Home

Manual GS200/GS200i

Contents

1. Opening a zoom window for the x axis scaling ofthe y axis is not changed Opening any zoom window for the y axis scaling of the x axis is not changed 5 1 3 2 Zooming and shifting of diagram contents using the mouse With the help of the mouse it is possible to zoom into the contents of a diagram Mouse Zoom and to shift zoomed contents within the diagram window Mouse Shift Selection of mouse assignment op tions is performed via tool 2 in the main tool bar see overview above In the Mouse Zoom mode the tool icon is a hand and in the Mouse Shift mode the icon is a magnifying glass Mouse Zoom For zooming the mouse is moved over the diagram window and the left mouse key Is clicked keep ing the left mouse key pressed the zoom window is opened The type of zoom window user defined Ultrasonic echoscope GS200 GS200i User manual version 0 60 19 Software General program structure parallel with x axis or parallel with y axis is determined by means oftool 12 ofthe respective tool bar see overview on page 19 Click in the main tool bar Fig 15 Expanding any optional zoom window using the mouse Click in the x axis tool bar Fig 16 Expanding a zoom window for the x axis Click 4 in the y axis tool bar Fig 17 Expanding a zoom window for the y axis 20 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software General program structur
2. 0 099 54 99 1 099 Fig 41 Transmission measurements at acrylic cylinders of different lengths top down 40 mm 80 mm and 120 mm To be able to compare the measured amplitude values the measurements must be per formed under equal conditions transmission output gain set up Consequently it is not possible to compare e g values from TGC amplified ranges with other amplitude values Ultrasonic echoscope GS200 GS200i User manual version 0 60 43 Software Echoscope operation with single element transducers GS200 GS200i 5 3 5 2 Measuring accuracy The analogue measuring signals of the ultrasonic transducers are digitized in the echoscope prior to transfer to the PC Display of the individual measurement points see figure 42 diagram on the right can be switches on and off by means of the set up tool Channels Points Visible in the main tool bar or the diagrams Resolution of analogue digital conversion Time offlight Depending on the sampling rate see chapter 5 3 3 1 Params tab At a sampling rate of 100 MHz it consequently is 10 ns Amplitude approx 1 mV A scan beembe A I I I I I r I I I r I I L I I I I I I r I I L Ro a r a I I I I I I I 1 I I I l I l I 1 I a 16 75 i 1725 1750 17 75 1800 18 25 16 9100 16 9200 16 9500 16 9400 16 3500 1 cursor Depth ps Depth ps la 1 Lae os 2 ee Cursors fae en 1 lL aes 2
3. Fig 36 Amplitude signal within the valid value range between 1 V and 1 V GS EchoYiew A mode About Print Brmode B mode M mode CT mode Imaging Refresh L SEES oas Front panel Status Trigger intern Online data FET filter off D lt T HF data overrun Average off Frame rate 5 Hz Se De Ze SAMPT Fig 37 Overdriven measurement signal cut out at 1 Volt Status of average value calculation Average Average Average off 5x The Average status indicator displays whether average value calculation is taking place and if so how many individual scans data sequences are used Setting of the average value calculation is per formed in the Params tab via the Averaging parameter see page 31 section Additionals Averaging Ultrasonic echoscope GS200 GS200i User manual version 0 60 39 Software Echoscope operation with single element transducers GS200 GS200i Frame rate Frame rate Frame rate 10 Hz The Frame rate indicates the update frequency for graphical display of the measurement results diagrams The maximum obtainable Frame rate depends on various factors such as duration of data transmission between echoscope and computer computing power of the PC number of measurement points determined by sampling rate and measurement range number of diagrams opened or number of notifications Frame rate must not be mistaken for the PRF parameter Th
4. Dia4 In the A mode tab it is possible to individually switch the diagrams on and off Since all other imaging ultrasonic procedures in the program are based on amplitude scans the A scan and TGC diagrams are also available B M and CT mode Ultrasonic echoscope GS200 GS200i User manual version 0 60 41 Software Echoscope operation with single element transducers GS200 GS200i 5 3 5 1 Time offlight and amplitude measurements With the help of the measurement cursor chapter 5 1 3 3 the times of flight of sound and echo amplitudes can be measured in the A scan diagram Time of flight measurement Time of flight measurements are carried out e g to determine the depth of discontinuities in a body or to determine the velocity of sound in a certain material With the sound velocity known scaling of the x axis can be switched over from time of flight to depth see figure 29 For measuring the time of flight of an echo signal or the depth of a discontinuity the vertical meas uring line of one of the measuring cursors must be moved to the starting point of the rising edge of the echo pulse to be measured figure 40 a D 3 a 0 0 so 100 350 400 450 500 550 600 650 700 750 800 Depth ps Cursor 1 Cursor 2 delta Cursors 22 31 1 000 55 569 1 000 36 37 2 000 Fig 40 Positioning of the measuring cursors for time of flight measurement in the Amp representation of an ultrasonic scan Measurements of th
5. Spectrum FFT I I i 1 li 1 I I I I a Br en A p ar been ee a ee eae 1 1 1 1 1 1 100 150 200 250 300 350 400 450 S500 550 i i 6 0 5 0 Depth ps Frequency MHz Fig 43 A Scan left with appertaining frequency spectrum right The frequency range of the calculated FFT spectrum depends on the sampling rate of the i measurement Resolution of the spectrum is limited by the number of measuring points used for calculation At the first start of the program all measurement points of an A scan are used for calculation of the frequency spectrum To restrict the data range the FFT range check box must be activated The data range for spectrum calculation is highlighted in gray The data range can be adjusted at will by shift ing the left and right limit of this range with the mouse see figure 44 50 100 150 200 350 300 350 400 450 500 550 l i 6 0 6 0 Depth ps Frequency MHz Fig 44 Frequency spectrum for the section of the measurement signal between 17 4 us and 23 6 us Ultrasonic echoscope GS200 GS200i User manual version 0 60 45 Software Echoscope operation with single element transducers GS200 GS200i The signal range for which the calculation of the frequency spectrum is performed is always I displayed in the upper left part of the spectrum diagram In this way it is possible to specify whether the calculated frequency spectrum is applicable for the entire data set or only part of the meas
6. Unknown An ultrasonic transducer is connected but cannot be detected e g in case of defec tive transducer coding 1 MHz An ultrasonic transducer with a transducer frequency of 1 MHz is connected 5 3 4 2 Information on program and measuring operation The fields of the Status display panel provide information on the program and measuring status Triggering of ultrasonic pulse generation Trigger intern Trigger extern Periodical triggering of the ultrasonic transducers for generation of an ultrasonic pulse may be per formed internally stand alone operation or PC operation or externally by means of a trigger The trigger field indicates whether the echoscope is set to internal or external triggering see chapter 4 4 2 External triggering Ultrasonic echoscope GS200 GS200i User manual version 0 60 37 Software Echoscope operation with single element transducers GS200 GS200i Data status Simulation Online data ae This field indicates whether the system operates using current measuring data on line data from the echoscope or using saved data simulation data in simulation mode see chapter 5 2 2 Simulation mode Status of the FFT filter FFT Filter off FFT Filter on Spectral analysis of the measured ultrasonic amplitude signal is possible by means of the program A variable frequency filter can be superimposed on the frequency spectrum which is determined with the help of an FFT function fast Fourier transfor
7. and 4 MHz figure 10 These ultrasonic probes are specifically designed for GS200 GS200i They are char acterized by high sound intensity and short sound pulses This makes it particularly suitable for pulse echo operation Depending on the operating mode of the probe ports the ultrasonic trans ducers operate as transmitter or receiver transmission or as transmitter receiver reflection Fig 10 Ultrasonic single element transducers blue 1 MHz red 2 MHz green 4 MHz The 1 MHz probes marked blue order no 10151 are particularly suitable for examinations with great penetration depths due to their high sound intensity Application of 1 MHz probes is particu larly recommended for examination of highly attenuating materials and for generation or Rayleigh or shear waves The 2 MHz probes marked red order no 10152 are suitable for a particularly wide range of applica tions Due to their higher frequency the axial resolution Is significantly higher than with 1 MHz probes In contrast to that the attenuation characteristics of most materials are not too high at 2 MHz so that it is easily possible to reach examination regions of medium depth The 4 MHz probes marked green order no 10154 are characterized by extremely short oscillation decay behavior resulting in highest axial resolution They are predominantly used in cases where resolution of very small structures is required Penetration depth which may be limited in some mate
8. every individual measuring point of distance of a scan cycle at consistent a scan cycle and stops velocity Trigger source GS EchoView measurement software CT control unit Ultrasonic echoscope GS200 GS200i User manual version 0 60 59 Software Triggering Data recording and processing Update ofthe dia grams Interruptingan CT measurement ble Echoscope operation with single element transducers GS200 GS200i Internal As soon as the CT scanner ap proaches a measuring point and stops there the measurement soft ware triggers transmission meas urement The measuring data of the transmis sion measurements are called up by the measurement software Sound attenuation and transition time and or velocity of sound are directly calculated for every measurement point of a scan cycle A scan Dia 11 The measuring lines of the cursors are positioned over the A scan signal according to the measurement values for signal am plitude signal attenuation and time of flight velocity of sound Attenuation Sound velocity Dia 13 Measuring curves of sound attenua tion and sound velocity are con stantly updated during the scan cycle Tomograms The CT images are up dated after every scan cycle The CT measurement can be inter rupted at any time External After every travelled section of the overall distance that corresponds to the Accuracy parameter the CT control unit transmits the trigger s
9. ultrasonic signal Ultrasonic echoscope GS200 GS200i User manual version 0 60 53 Software Echoscope operation with single element transducers GS200 GS200i 5 3 7 M mode In M mode of the GS EchoView program ultrasonic measurements may be performed according to the TM Time Motion method Representation and function are similar to B mode ofthe program see chapter 5 3 6 from page 51 Figure 53 illustrates a TM measurement using the example of a model of a human heart GAMPT 10220 Equal to a B scan the amplitudes of the ultrasonic signal echoes of an A scan are mapped on the y axis of the TM scan in gray or color values The time shifted echoes occurring with a high PRF are mapped on the horizontal time axis one next to the other In contrast to the B scan method the ul trasonic transducer is not moved during measurement Moreover in the TM image only the last ul trasonic echoes of a definable time window are displayed In this way a continuous curve chart run ning from right to left is generated it represents the temporal movement of the structure under test GS EchoYiew M mode Exit About Print E Parameters Start M scan amp mode B mode M mode CT mode Imaging 4 scan selection HF Amp Both NM scan Params USB Draw M mode Levels Show levels Depth mm v Gray scale Auto min max Level min 0 0 T gt Level max 0 3 gt U 040 Measurement time 20 15 aed ere s 10 0 020 I
10. actuating the button again which is named Stop B scan while the B scan measurement is performed After completion of the B scan measurement the measuring cursor and the tools of the diagram tool bar can be used for evaluation of the B scan image Ultrasonic echoscope GS200 GS200i User manual version 0 60 51 Software Echoscope operation with single element transducers GS200 GS200i e During a B scan measurement all other switches diagram tools and measuring cursors are i deactivated If the program is still in stand by mode when the measurement is started it is automatically switched to measuring mode After completion of the measurement the program will re main in measuring mode i e the program continues to perform amplitude scans Coding of the amplitude scans By coding the amplitude scans are transformed into line scans with every measuring point of a scan being assigned a gray or colored value according to its amplitude Normalization and scaling of the gray and color values can be performed automatically or manually specified The Levels group in the B mode tab is intended for that Show levels Display of the gray value or color value scaling on the right opposite the B scan diagram Gray scale Switch over between gray value and color value coding Auto min max Automatic or manual Level min max normalization of scaling B scan B scan 4 scan selection HF Amp Both A scan selection HF Amp Both Para
11. echoscope PROBE 1 or PROBE 2 Display PROBE 1 PROBE 2 Operating mode T1 R1 f Transmitter and receiver not active Reflection reflection T1 R2 f PE ne Transmitter Receiver Transmission transmission T2 R2 en Receiver Transmitter Transmission transmission T2 R2 f f l not active Transmitter and receiver Reflection reflection 36 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i Transmission output of the echoscope OUERLIE Ou Bue Ou BuUE OFF 5 dB u 30 dE The Output field displays the transmission level set atthe echoscope In the Mode indicator field the user can read to which connection port Probe 1 or Probe 2 the transmission level is applied Gain of the echoscope aain aain 34in O dB c dE u 35 dE The Gain field displays the amplification of the signal of the ultrasonic transducer set at the echo scope Connected ultrasonic transducers Probe 1 l Frobe 1 Frobe 1 Probe 1 Frobe 1 no probe unknown 1 MHz 2 MHz 4 MHz The fields Probe 1 and Probe 2 indicate whether or not an ultrasonic transducer is connected to the respective probe input and whether or not the transducer was detected by the system The GAMPT ultrasonic transducers are equipped with a hardware code so that they can be detected automati cally Display Description no probe There is no ultrasonic transducer connected
12. is designed for operation with sin gle element ultrasonic transducers as described in chapter 4 5 1 It is equipped with two probe con nections that can each be used individually in pure pulse echo mode reflection with an ultrasonic transducer connected or together in transmission mode with two equal type ultrasonic transducers The GS200 has a USB interface for transfer of measuring and control data between the device and a computer connected For computer operation mode of the device the GS EchoView measuring and control software is included in the scope of delivery A detailed description of the program is pro vided in chapter 5 In combination with an oscilloscope the GS200 may also be used in stand alone operations 4 2 The extended device version GS200i The GS200i is the same as GS200 except with an extra component for imaging ultrasonic examina tions including an ultrasonic array transducer according to the B scan procedure i e GS200i GS200 Imaging module The scope of delivery includes a convex array transducer see chapter 4 5 2 The connection port for the array transducer is located on the rear of the GS200i chapter 4 4 Setting and performance of measurements using the array transducer are only possible in computer operation mode with the GS EchoView program Factory retrofitting of the basic unit GS200 ata later stage implementing an additional com i ponent for B imaging operation together with an array
13. specimen and transducer head the amplitude of the echo impulses decreases with increasing run time and number of reflections Amplitude V o Bs oO D to oO 0 00 QV TT SEHEN Orca 0 0 25 5 0 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 S500 525 550 575 600 j cursor Depth ps it ae 1 LO eee ER 2 i A Cursors it ae 00 0 662 LO eee ER 99 0 000 i A 99 0 582 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525 550 575 600 Depth ps Fig 5 Amplitude scan with TGC Figure 5 shows an amplitude scan performed in the same test specimen as figure 4 applying the same measurement conditions but also implementing time gain control 10 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Ultrasonic echoscope Control elements on the front side 4 3 3 BNC outputs MONITOR For stand alone operation ofthe echoscope together with an oscilloscope GS200 GS200i is equipped with four BNC outputs These are located on the front side ofthe device in the MONITOR section fig ure 2 After switch on ofthe GS200 GS200i the following analogue signals may be picked up atthese out puts TRIGGER Trigger signal for pulse activation of the 1 2 and 4 MHz probes TGC Signal of the time gain control US SIGNAL Ultrasound signal actual measurement signal A SCAN A Scan or amplitude signal envelope of the ultrasound signal MONITOR Tek Ue T
14. tool bars Saving loading of diagram settings Using the Load and Save buttons figure 34 it is possible to save and load the settings for all dia grams in A mode B mode M mode and CT mode at once With the help of the Auto load and Au to save the user can activate or deactivate automatic loading and or saving of the diagram settings during start up and closing of the program All diagrams settings Load Save Fig 34 All diagrams settings function group in the Draw tab i Please note that during closing of the program the last saved diagram settings are overwrit ten without further notice ifthe Auto save parameter is activated Below a brief description ofthe program behavior at various settings ofthe Auto load and Auto save parameters with regard to saving and backup of diagram settings is provided Auto load Auto save At program start up the default settings are loaded Any modified dia gram settings are not saved when closing the program Auto load Auto save At program start up the settings last saved are loaded When closing the program the program overwrites the data backed up last by the current diagram settings Auto load Auto save At program start up the settings last saved are loaded Any modified dia gram settings are not saved when closing the program Autoload iw Auto save At program start up the default settings are loaded When closing the program the program overwrites the data backed up las
15. transducer is possible For this pur pose please contact your vendor or GAMPT mbH GS200 GS200i and the ultrasonic transducers have been specifically adapted to one another Please only connect the ultrasonic transducer to the device specifically provided by GAMPT GAMPT will not assume any warranty or liability if transducers of other makes are connected to the devices 6 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Ultrasonic echoscope Control elements on the front side 4 3 Control elements on the front side The major control elements and connection ports for measuring operation using single element transducers are located on the front side of the GS200 GS200i For better illustration of the basic operating principle ofthe device the individual components ofthe echoscope have been grouped according to their functions and are also visually separated accordingly D C B A RECEIVER TRANSMITTER GAIN dB 0 OUTPUT dB OFF ULTRASONIC 11 ECHOSCOPE GS200i gaMPT 12 1 3 TRANSMITTER RECEIVER MODE 112 211 14 1 ON OFF 10 9 8 7 6 5 4 3 2 Fig 2 Front view of the GS200i A Power supply unit C Time gain control 1 On Off switch of the device 7 Rotary switch for slope 8 Rotary switch for start point 9 Rotary switch for width 10 Rotary switch for threshold B Receiver transmitter unit 2 Probe port 2 3 Rotary switch for transmitter output level 4 Mode selector sw
16. ultrasonic transducers described in chapter 4 5 1 CT scanner order no 60200 CTsample order no 60121 CTcontrolunit order no 60210 Hydrophone support order no 60123 CT reservoir order no 60120 Hydrophone order no 10250 6 1 1 CT control unit UCT200 The CT control unit is the electronic control system for the CT scanner The device may be operated and controlled both by means of the GS EchoView program via the USB interface and manually by means of the switches at the front side of the device ULTRASONIC COMPUTER TOMOGRAPH UCT200 8 RASONIC SOLUTION 3 4 Fig 62 Frontand rear side of the CT control unit Front side Rear side 1 Switch for travel of the motor carriage 6 Socket for power supply connection 2 Switch for rotation of the magnetic plate including fuse 3 Connection port for the CT scanner 7 USB interface 4 Switch for velocity selection 8 Trigger output 5 On Off switch 64 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Accessories CT equipment Fuse replacement Replacement ofthe fuse ofthe device may be performed analogously to the descriptions in chapter 4 4 1 on page 12 for the echoscope GS200 GS200i 6 1 2 CT scanner By means of the CT scanner a sensor ultrasonic converter hydrophone or an object under test CT sample can be rotated in a defined manner or moved forward and backward on a linear axis The scanner is equipped
17. AHSB GAHS E GAHSE GAHS B gt A oap ADC Version 6 6 ADC Version 6 6 EI HULMLEER TIR version 2 1 TIR Yersion 2 1 z CT control CT control CT control d CT control Open USB to CT control Open USB to CT control Open USB to CT control ID string GACT ID string GAFR ID string SAT ID string GALT no adapter Found no adapter Found G4CTOOOO CT Contral G4CTOOOO CT Contral ue version 5 10 ue version 5 10 Fig 31 USB tab at various connection statuses A devices not connected or not switched on B USB connection with echoscope established no connection established with CT control unit incorrect USB ID string C USB connection with echoscope and CT control unit established D echoscope not connected or not switched on USB connection with CT control unit established scanner functions can be used chapter 5 3 3 4 5 3 3 3 Drawtab Color schemes In the Draw tab it is possible to perform basic color settings for the diagrams that will be applicable for all diagrams and are automatically saved when closing the program Users can change between two color schemes Dark Dark background bright foreground axes and writing This setting is particularly suitable when working with a monitor see figure 32 Bright Bright background dark foreground axes and writing This color scheme is best suitable for printing diagrams or screen shots see figure 33 32 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Ph
18. Em Cursors la 33 0 250 Lae os 99 1 000 ee 06 1 250 33 0 250 ee 99 1 000 Em 06 1 250 L 42 Display Losi values in various zoom views The numeric values individual points axis scaling and cursor positions that can be read from the diagrams generally are interpolated values that seem to become more and more accurate through auto scaling during zooming see figure 42 Therefore we recommend generally not using numeric values with higher accuracy than the resolu tions of AD conversion stated above For this reason the cursor values below the curves are always displayed with an accuracy of 0 01 us and or 0 001 V Naturally the accuracy with which the measuring cursors are positioned within the diagram in creases with increasing zoom However the extent of improvement of measuring accuracy achieved by more precise positioning also depends on the absolute value of the variable to be measured relative error A4 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i 5 3 5 3 Frequency spectrum and frequency filter Frequency spectrum In A mode of the program it is possible to perform a frequency analysis ofthe ultrasonic scan called up The frequency spectrum ofthe ultrasonic scan is calculated by means of a fast Fourier Transfor mation FFT and is displayed in the Spectrum FFT diagram figure 43
19. H Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Technical data Ultrasonic probes 8 2 Ultrasonic probes Single element transducers GAMPT 10151 10152 and 10154 Frequency 1 2 and 4 MHz Dimensions 65 mm x 27 mm L x D without cable Active transducer element Disk with a diameter of 16 mm Cable Length approx 1 5 m LEMO plug for connection with one of the PROBE outputs of the GS200 GS200i Array transducer GAMPT 10415 Frequency range 3 5 MHz Transducer array Convex 64 individual elements 8 3 CT devices CT control unit UCT200 GAMPT 60210 Front side connection port Stepper motor control SCANNER bipolar 5 V max 2A Rear side connection ports Mains connection BNC trigger output USB interface Mains voltage 100 240 V 50 60 Hz Power consumption Max 50 VA Fuse T 1A EN 60127 2 3 G fuse link time lag 1 ampere 5 x 20 mm Dimensions Approx 185 mm x 170 mm x 325 mm W x H x D CT scanner GAMPT 60200 Linear movement Max travel distance approx 400 mm Resolution lt 10 um Max travel velocity approx 18 cm min Rotary movement 360 Resolution approx 0 225 Max rotary velocity approx 1 U s Dimensions Approx 210 mm x 353 mm x 520 mm W x H x D Ultrasonic echoscope GS200 GS200i User manual version 0 60 69 Literature 9 Literature Millner R Ultraschalltechnik Grundlagen und Anwendung Physik Verlag 1987 Kuttruff H Physik und Te
20. ITTER cccccccsccecescccececcesececeees 8 232 NGC Unitt ime GanContro ass a a 8 42323 BNE outputs MON TOR 2a 11 4 4 Connection ports on the rear side of GS200 GS2001 csccscescscescscesceees 12 detec FUSE TE Dla Celie tu isn 12 PAD EMT OEM at LiL erine ana Eu 13 4 5 Ultrasonic pr besa u u ns 14 4 5 1 Single element transducers GS200 GS200i ceccscesccscescescescescescesceecescees 14 4 552 ALA Urals Gc GS72 00 2 5 ee 15 5 SOWA eier 17 5 1 lt General program Structure u ar e 17 5 121 Userinterfaceof the program na reine 17 5 142 FUNTON WEC S assa ea 18 Da so Diap raS aioe E R N a amemceraaenuegees 18 SLL Diagram OO DI eos iera n E Guaanseuatesunes 18 5 1 3 2 Zooming and shifting of diagram contents using the mouse 19 5 13 23 Measuring CUISONS en 22 Ser PLN Com None een een ee 23 3 2 Propgramstart snscssin 24 5 2 1 MM ali Za tl Ole ceseiece senate sleet E Aa 24 5 2 2 SIMULIO Modena ER Aen ad 25 5 3 Echoscope operation with single element transducers GS200 GS200i 26 5 3 1 Starting interrupting and completing the measuring mode ceeeeeee eee ee 26 5 3 2 Visualization of the measurement signals in an A scan diagraM ceeeeeeeeeeee 26 Ultrasonic echoscope GS200 GS200i User manual version 0 60 1 Table of Contents 10 11 5 3 3 Measuring and program parameters cccscccccccscscscecescscscscscscseseseseesasescsoees 27 533 1 Para
21. R TE EI FE Fe BE FE aa LP eS Cee ae ed Oe ee 00 100 200 300 400 500 0 00 1 00 2 00 3 00 4 00 5 00 6 00 7 00 8 00 gaMPT O cursor Depth ps O cursor Frequency MHz reg Fig 46 Measurement using a 2 MHz probe without filter in the top range and band pass filter in the bottom range When delimiting the data range ofthe ultrasonic signal for calculation ofthe frequency spectrum the frequency filter is only applied to the data of this signal range Fig 47 M FFT range Ascan with FFT filter L16 2 gt 34 5us_ Spectrum FFT Den SE oo N CTP Pt Can 0 60 ES Kaneidst eee Trigger intern Params USB Draw i a a ae Lee 0 20 E Ba BS eee oe 5 0 00 FFT filter on B o20 MR Al eee a en Middle md fo gt He data in range 0 40 4 ik l r t t width MH2 fuo gt i Average 0604 ft kasance eee off Gate form 2 J gt Frame rate w ie pave o 10 He Fern BE ER oes vem a VE EEE CHEN emma Fre HIER HT a ll terete fC gt er Terme ls ee et Cepstrumfilter 00 100 200 300 400 500 0 00 1 00 2 00 3 00 4 00 5 00 6 00 7 00 8 00 gaMPT one i a O cursor Depth ps O cursor Frequency MHz en Fig 47 Bari pass filter applied to a frequency spectrum that was only calculated for a part of the measure ment signal Ultrasonic echoscope GS200 GS200i User manual ver
22. Training Aid ULTRASONIC ECHOSCOPE GS200 GS200 Reflection and Transmission Measurements A scan B scan TM mode CT mode amp B imaging ECHOSCOPE GS200i e15 gaMPrT User Manual 5 ULTRASONIC SOLUTIONS www gampt de Revision Version 0 60 EN Dezember 09 2015 Gesellschaft f r Angewandte Medizinische Physik und Technik mbH Hallesche Stra e 99F 06217 Merseburg Phone 49 3461 278691 0 Fax 49 3461 278691 101 E mail info gampt de Visit us on the internet www gampt de 2015 GAMPT mbH All rights are reserved for GAMPT mbH No part of this manual may be reproduced or processed cop led or distributed in any form without the prior approval of GAMPT mbH GAMPT mbH is not liable for damages occurring as a result of incorrect use or for repairs and altera tions carried out by third parties not authorized by GAMPT mbH Subject to technical alterations Errors excepted Printed 12 09 2015 Version 0 60 EN Table of Contents Table of Contents 1 Safe Informations mv u a rtrbk z sus aa 4 2 SCOpeOF delivery een 4 3 Introduction esse 5 4 Ultras nicechoscop 22222222 2222 Ba BE ana aa aaa ee 6 WA The bas c unit 65200 6 4 2 The extended device version GS200i csccsccscsccccsccscsceccscescscescscescscesceee 6 4 3 Control elements on the front side cscsscescsceccscescsccscscescscescscsscscescees 7 4 3 1 Receiver transmitter unit RECEIVER TRANSM
23. age travels forward and backward The value ought to be selected such that the object under test can be scanned completely Fig 57 Scanner parameters for Angle Defines the angle in degrees by which the sample i e the a CT measurement magnetic plate at the motor carriage of the CT scanner is rotated after every scan One CT measurement process takes until the Bm sample is rotated by 360 In this way the angle determines the number ofscan cycles of aCT measurement Accuracy Defines the resolution of a scan cycle in millimeters i e the distance between two measuring points ofa scan cycle The quotient from length and accuracy is the number of measuring weg ae u aaa points per scan cycle cursor Depth Fig 58 Determining the time of Threshold for velocity Defines the threshold value of the A scan flight by means of a amplitude in millivolt at which the time of flight or velocity of threshold value sound Is calculated figure 58 5 3 8 3 Internal and external triggering of CT scans Synchronization of the mechanical movements of the CT scanner with generation of ultrasonic pulses for determination of sound attenuation and time of flight velocity of a transmission pulse during a CT scan as well as data recording and evaluation are performed in different ways based on the trig ger type selected Internal External Mechanical move Stepwise The CT scanner approaches Continuous The CT scanner travels the ment
24. al millivolts measurement curve on the left in figure 30 This amplitude offset has an effect on calculation of the envelope of the ultra sonic signal Activation of the delete Yoffset parameter results in automatic correction of the offset for every amplitude scan measurement curve on the right in figure 30 delete Yoffset A scan J 50 100 L cursor Depth mm J 50 100 L cursor Depth mm Fig 30 Amplitude scans with and without amplitude offset correction Additionals PRF Activation of the ultrasonic transducers for generation of sound pulses and subsequent analogue digital conversion of the signal channels ultrasonic signal and TGC signal in the echoscope is trig gered by a specific frequency This trigger frequency is either pre defined stand alone operation external trigger or dependent on the PRF parameter PC operation with GS EchoView Only one signal channel is processed per trigger pulse If both the ultrasonic signal and the TGC sig nal are requested by the program analogue digital conversion of the signals is performed alter nately While the ultrasonic signal is always requested by the program in measuring mode the TGC signal is only requested with the TGC window open 30 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i The PRF parameter pulse repetition frequency then speci
25. an so that the tomogram generation can be tracked step by step amplitude velocity filtered Shep Logan Dias 23 und 33 Cross sectional CT images equal to Dias 22 and 32 but with application of the Shep Logan filter that is intended to emphasize the contours GS EchoYiew CT mode Cancel CT A mode B mode M mode CT mode Imaging Freeze last scan velocity 4 scan selection P HF R Amp Both Params USB polling Scanner CT mode 40 00mm 158 4 End Point Switch amplitude unfiltered velocity unfiltered i Current Scan 12126 80 0 90 0 time 00 01 21 Depth ps Shots ol161 Length mm Angle Accuracy mm Treshold mW For 50 velocity 40 0 200 00 200 400 gaMPT O cursor scan length mm UURASONIC sout ONS Fig 56 Program view in CT mode operation 58 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i CT parameters Speed Relative velocity ofthe motor carriage Use external trigger Defines the trigger type external internal of the echoscope during the CT scans With this check box activated triggering is performed externally by the CT control unit Length mm Angle Accuracy mm Treshold mV for velocity Length Defines the width of the desired cross sectional image of a CT measurement i e the path in millimeters that the motor car ri
26. asurement range Begin ps Ot Sound velocity azn aTe 2f10 unit in diagrams us un Begin mm Bo rm 100 Bia al O90 0 90 0 80 0 70 0 60 0 S 0 40 Amplitude W I ZU BE 0 10 F T 1 L cursor Fig 29 A scan on the left represents run time measurement and on the right represents depth measurement Ultrasonic echoscope GS200 GS200i User manual version 0 60 Amplitude Y Measurement range Begin ps 0 End ps 50 Sound Velocity rg alo ms unit in diagrams SoCs Lis e mmi Begin mm End mm A scan 1 00 Hase 0 g0 0 30 0 80 0 60 0 50 0 40 ee ee ee nnnm ee ee ee eenubecMecscecboeaotesoboe odo oseboac d Zu BE 10 nl om hoshooo sootess 00 100 200 300 400 50 0 L cursor Depth mm 29 Software Echoscope operation with single element transducers GS200 GS200i A scan parameters Measurement range Sound velocity Amplitude scans may be performed as run time or depth measurements figure 29 Selection is made by specification ofthe scaling unit at Unit in diagrams us microseconds for run time measurement or mm millimeters for depth measurement Indication ofthe propagation velocity velocity ofsound required for calculating a depth measure ment can be made in the Sound velocity input field Additionals delete Yoffset The amplitude of an ultrasonic signal may have an offset of sever
27. chnik des Ultraschalls S Hirzel Verlag Stuttgart 1988 Krautkr mer J Krautkr mer H Werkstoffpr fung mit Ultraschall Springer Verlag 1968 Further Sutilov V A Physik des Ultraschalls Akademie Verlag Berlin 1984 Morse P M Ingard K U Theoretical Acoustics McGraw Hill Book Company New York 1968 10 Revisions of the user manual Revision Revision date Description 0 50 Feb 17 2015 Initial release GS EchoView version 4 15 1 27 0 60 Dez 09 2015 GS EchoView Version 4 2 15 6 17 Added chapters Scanner tab and Scanner status Updated chapter Frequency spectrum and frequency filter Updated chapter CT mode 70 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Index 11 Index A A mode 42 Amplitude measurement 43 Cepstrum 49 Cepstrum filter 50 Frequency filter 47 Frequency spectrum 46 Time of flight measurement 43 Array transducer 16 A SCAN BNC output 11 A scan visualization HF Amp Both 27 Averaging 32 B mode Color value coding 53 Gray value coding 53 Time location coordinates 53 TOFD 54 BNC sockets 7 11 13 C Cepstrum 49 Cepstrum filter 50 Color schemes 33 Computer tomography 57 Connection ports Frontside 7 Rear side 13 14 17 Controlelements 7 CT mode Measuring procedure 62 Parameters 60 Scanner status 41 Triggering 60 Ultrasonic echoscope GS200 GS200i User manual version 0 60 D Depth measurement 31 Dev
28. command Fig 22 Print command The Print command in the program menu is perfectly suitable for quickly capturing the program status measurement curves parameter settings status information This command generates a screen shot of the program interface and displays it in a preview window From there it is possible to directly print the screen shot or save it as a pixel graphic jpg bmp Preview freee Mere per a Erit Save as Printer Setup In Qu Refresh Close aeragho PRE THe Save Ptr L Lod Pararmtar s O arer orientation Borders AN Er portait lanscape AY mm 20 gt 2q BO 0 Fit Kyocera F5 1370DN KX oben 44 297 x 210mm Fig 23 Preview window of the print function Inthe same way it is possible to use the print function in the main tool bar ofthe diagramsto create a screen shot of an individual diagram chapter 5 1 3 1 Diagram tool bars Ultrasonic echoscope GS200 GS200i User manual version 0 60 23 Software Program start 5 2 Program start 5 2 1 Initialization During program start the GS EchoView program performs an initialization phase During this phase the connection status with the GS200 GS200i echoscope is first verified Subse quently the measuring parameters and program settings are loaded that were saved during the last closing of the program Finally the device and program status is determined and displayed in the
29. cursors are designed as cross line cursors comprising two measuring lines of which one runs parallel with the x axis and the other runs parallel with the y axis For each of the two measuring cursors the appertaining x y coordinates for their current position intersection points of the measuring lines with the axes of the diagram are displayed below the diagram Cursor 1 and Cursor 2 Moreover the differential values between the x and y coordinates of the two cross line cursors are displayed delta Cursors It is possible to define additional cursors by means of the set up function in the main tool bar However only the coordinates and differential values of the pre set cursors 1 and 2 are dis played below the diagram Positioning the measuring cursors Double clicking the left mouse key moves measuring cursor 1 to the position of the mouse pointer in the diagram and double clicking the right mouse key moves similarly measuring cursor 2 Moreover the measuring lines of a cursor can be individually or jointly be selected and shifted by means of the 22 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software General program structure mouse figure 21 Forthat purpose the mouse pointer is positioned above the respective measuring line which is then visually highlighted The selected measuring line can only be moved within the diagram with the left mouse key pressed and held 5 1 4 Print
30. drives back to its start position During the scans the respective change in amplitude and time of flight in comparison with the first measuring point is displayed in diagram 13 in the bottom left corner At the same time the position current angle and duration of the measurement are displayed in the CT Status field in the CT mode tab After completion of a scan for an angle one scan cycle the measured values are converted to color values and included in the CT images according to the respective angle see description in chapter 5 3 8 2 This sequence is repeated after every angle so that formation of the ultrasonic tomogram can be tracked step by step Recommended parameters for first measurements of the CT sample GAMPT 60121 Params tab CT mode tab Sample Rate 50 MHz Angle 14 4 Begin End 70 us 100 us Length 80 mm delete Yoffset activated Accuracy 0 500 mm Threshold 50 mV Settings at the echoscope OUTPUT and GAIN 15 dB 15 dB 2 MHz probes TRANSMITTER RECEIVER MODE 1 2 or 2 1 transmission TGC THRESHOLD WIDE SLOPE START all switches in zero position Switch for external triggering off see chapter 4 4 2 on page 13 Ultrasonic echoscope GS200 GS200i User manual version 0 60 63 Accessories Accessories 6 1 CT equipment With the help of the equipment listed below in addition to CT measurements it is possible to also perform mechanically guided B scan measurements or linear sound field scans of the
31. e Mouse Shift Zoomed diagram contents can be freely shifted within the diagram window For shifting the mouse is moved over the diagram window and the left mouse key is clicked keeping the left mouse key pressed the diagram is moved into the required direction Fig 18 Free shifting of zoomed diagram content Axially parallel shift 8 Q It is also possible to shift zoomed contents parallel to the axis within the diagram window independ ently of the set mouse mode For this purpose the mouse Is moved over the x or y axis and the left mouse key is clicked keeping the left mouse key pressed the diagram is moved into the required direction ve 70 g 80 Se 90 TR 100 40 50 60 70 Fig 19 Shift parallel to the x axis 0 67 0 4 0 2 0 2 Fig 20 Shift parallel to the y axis Ultrasonic echoscope GS200 GS200i User manual version 0 60 21 Software General program structure 5 1 3 3 Measuring cursors In general for every diagram two measuring cursors Cursor 1 and Cursor 2 are pre set With its help it is possible to make statement e g of absolute and relative run times depths or amplitudes The measuring cursors can be shown or hidden by means of a check box in the lower left corner of the diagram GS EchoYiew A mode Exit About Print E Armode B mode M mode CT mode Imaging gt bar lt SL o UL sql Depth ps Tr Fig 21 Selected measuring cursor in the A scan diagram The measuring
32. e TGC The TGC is infinitely variable between 0 and maximum approx 30 dB The maximum adjustable time range to which the TGC can be applied is approx 150 us By changing the start value the TGC curve can be shifted along the time axis The GS EchoView measuring and control software provides a separate diagram window that displays the TGC in the form ofa curve figure 3 The TGC diagram is always available paral lel with the A scan diagram in allprogram modes 1 THRESHOLD 2 WIDE 3 SLOPE 4 START 400 50 0 Depth ps Fig 3 Diagram with TGC curve GS EchoView Ultrasonic echoscope GS200 GS200i User manual version 0 60 9 Ultrasonic echoscope Control elements on the front side The two figures below illustrate the principle of functioning ofthe TGC 75 100 125 150 175 200 225 250 275 300 325 350 375 400 25 450 475 500 525 50 575 600 Depth ps it iii 1 i FE 2 i ii Cursors it iii 00 0 862 i FE 99 0 236 i ii 99 0 646 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 525 550 575 600 Depth ps Fig 4 Amplitude scan without TGC Figure 4 shows the amplitude scan of a reflection measurement without TGC using a homogeneous test specimen The scan shows a number of echo pulses resulting from repeated reflections at the bottom of the specimen material air boundary Based on the attenuation of sound inside the mate rial and the mere partial reflection at the border between test
33. e absolute time of flight may be faulty e g due to co measurement of the time of flight within the matching layers of the ultrasonic transducers These faults may be avoided by relative time of flight measurements using both measuring cursor use of multiple reflections use of a delay path determination of the difference by measurement of times of flight for various sound paths Amplitude measurement Amplitude measurements are performed e g for determining the sound attenuation in a material For measuring the amplitude of an echo signal the horizontal measuring line of one of the measur ing cursors is used figure 41 The amplitude value of an individual echo signal is not diagnostically conclusive on its own There fore comparative measurements are generally carried out The amplitude scans in figure 41 show e g amplitude measurements at acrylic cylinders of different lengths In this example decrease of 42 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i the amplitude of the pulse signal with increasing time of flight represents a measure for sound at tenuation in acrylic Amplitude V 60 50 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 Depth ps Cursor 1 Cursor 2 0 00 1 000 54 99 0 970 Cursor 1 0 00 1 000 0 4 901 109 0 00 1 000 54 99
34. e g for evaluation of multiple echoes at very thin layers figure 48 The dimension of the independent cepstrum variables is identical with the dimension of in dependent variables of the starting function from which the spectrum was derived Depend ing on the unit set for the A scan diagram usec or mm see figure 29 on page 29 in cepstrum it is possible to read times of flight e g of a thin layer or directly the thickness of such a lay er 48 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i FFT range 7 7 gt 65 9 us Spectrum FFT ey Seer ett ie eed oe i ANS h i J i i l 50 200 250 3 00 wre Frequency MHz ee ee et a ee oe oe de 100 125 150 175 200 225 250 275 Distance lt n Gap Interval mm ee ee 75 121 60 Baer 57 12 31 15 52 134 00 FFT range 1 00 7 0 90 0 50 0 70 0 60 0 50 0 40 0 30 0 20 gt 0 10 Hr ED i 0 10 0 20 0 30 0 40 0 50 0 60 0 70 0 80 0 90 100 125 150 175 200 225 250 275 1 00 Distance an Gap Interval mm O cursor Depth mm eee 75 121 60 a ae 74 1 24 1 99 122 90 Fig 48 Amplitude scan frequency spectrum and using the Bi ofthin acrylic plates top one plate with a thickness of 9 7 mm bottom two plates with a thickness of 7 8 mm and 9 7 mm respectively 3 aa 3 50 200 250 3 00 ll ae Frequency MH
35. e that the CT control unit is switched to Online mode In older program versions also the Use scanner check box must be activated Step 2 Setting the measuring and CT parameters Then the general measurement parameters are set in the Params tab and the transmission level the receiver gain and the measuring mode transmission T1 R2 or T2 R1 are set at the front side of the GS200 GS200i e At 0 usec in A scan the amplitude of the transmission signal shows a slight overshooting that generally exceeds the set threshold value for time of flight and or velocity determina tion Select a value shortly before the transmission pulse to be the starting point of the meas uring range It must be noted that although it is possible to have TGC activated during CT measurements I this may well lead to unforeseeable results The CT algorithm used is not capable of compen sating for various gains during measurement Therefore we recommend deactivating the TGC during a CT measurement or setting TGC such that it causes uniform gain throughout the set measuring range TGC at a maximum In the end the CT parameters described on page 59 will be set Step 3 Performing the actual measurement Now the CT measurement can be started by the Start CT button Start CT Line break Shot break If the Line break check box is activated the program will automatically interrupt the CT measure ment after every scan cycle Ascan cycle corresponds to al
36. e ultrasonic echoscope is a laboratory device not a medical product The ultrasonic probes must not be used with persons or other living beings Compliance with the special operating and safety information in the individual chapters is mandatory 2 Scope of delivery Device GS200 GS200i Order number 10400 10410 Connecting cable Mains cable Mains cable USB cable USB cable Measurement software GS EchoView GS EchoView Ultrasonic transducer Convex array transducer amp GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Introduction 3 Introduction Ultrasonic echoscopy sonography is one ofthe most important examination methods in medicine and materials engineering Despite the vast number of ultrasonic devices used for the most varied applications all are based on the same fundamental principle transmission of a mechanical wave reflection transmission of the wave and recording it in an echogram num ULTRASOUND FETAL PHANTOM Fig 1 Echoscope GS200i including equipment With our range of ultrasonic echoscopes we provide highly sensitive measuring devices for ultrasonic examination in pulse echo mode reflection or transmission using single element transducers GS200 GS200i or in B M imaging mode using an array transducer GS200i only The devices may be used together with an oscilloscope to combine to simple ultrasonic echoscopes for A scan measurements with sing
37. e values of these two parameters may significantly deviate from one another While PRF is limited by the processing speed of the electronic components ADC micro controller etc Frame rate depends on the factors described above 5 3 4 3 Scanner status Se ep pee eee pee eee eee ee Scanner I PL moving i aenn TITETETTTYTTITYTITETETETITTITYTTTETETETITETEETETETET 16 0 Scanner End Point Switch Pelling 20 27 Current 0 0 Scan 3145 End Point Switch time 00 00 19 Shots Current oligi Trans Rotat Fig 38 Examples of status information on scanner and measurement The Scanner group displays status information that is specifically relate to the CT scanner and measurements using the CT scanner While handling the CT scanner or during a measure ment the latest values with regard to position of the motor carriage and angle position of the magnetic plate or on the sequence of the measurement number of the current scan cycle duration of measurement can be found here Moreover the current status of the limit switches of the CT scanner is displayed see chapter 6 1 2 Eg Limit switch at the end stop ON Limit switch is free OFF The Scanner group is only displayed if the program detects a connected CT control unit GAMPT 60210 In older program versions the fields can be found in the CT mode tab 40 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de So
38. el Plot Area Fig 14 Schematic program structure 1 Button bar This section primarily contains the mode selector switches used for calling up the various program modes A mode B mode M mode CT mode and Imaging Depending on the pro gram mode selected additional function switches may appear In the program module GS Image imaging mode with the GS200i chapter the button bar is not available 2 Parameter panel This panel can be optionally shown or hidden and contains all relevant adjust able program and measuring parameters in a structurally grouped manner Assignment of the pa rameter groups that can be called up via the tabs varies by the respective program modes For clarity and overview purposes it is possible to optionally show or hide individual parameter groups 3 Plot area Depending on the program mode in the central area of the program interface it is pos sible to display one to none diagrams for evaluation and visualization of the measuring data supplied Ultrasonic echoscope GS200 GS200i User manual version 0 60 17 Software General program structure by the echoscope Except for Imaging mode every diagram can be separately configured and con trolled via tool bars see chapter 5 1 3 1 Diagram tool bars 4 Info panel This field provides information about settings to be performed at the front side of the echoscope operating mode transmission output gain probes connected and information about the prog
39. facts are compa rable Moreover time of flight or velocity ofthe ultrasonic signal between the transmitter and re ceiver can be measured with US CT as an additional variable Through evaluation of several simulta neously measured parameters US computer tomography is able to provide additional information for an object under test 56 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i Differences between X ray CT and GAMPT ultrasonic CT With X ray CT Fig 55 top a transmitter transmits rays through the object The x rays attenuated by the object are detected and recorded by a receiver at several points simultaneously Then the transmitter receiver system rotates around the object under test and starts another scan This is re peated until all required angles are included Scan 1 Scan 2 Scan 3 Transducer N NY Receiver X ray CT Transducer o Receiver GAMPT US CT Fig 55 Comparison between x ray CT and GAMPT ultrasonic CT With our ultrasonic CT Fig 55 bottom the transmitter and receiver are fixed Attenuation of the intensity and the time of flight are only measured at one location Therefore for every angle the attenuation values of the object and the sound transition times are measured at several positions one af
40. ff switch for external triggering 2 BNC connection port for external triggering 3 Socket for power supply connection 4 Connection port for array transducer GS200i only 5 USB port 4 4 1 Fuse replacement A fuse insert is integrated in the lower section of the power supply socket 3 This accommodates the fuse for the device and a spare fuse For replacement of the device fuse the fuse insert must be pulled out from the power supply socket figure 8 Fuse type required T 1A see chapter 8 1 Fig 8 Power supply socket with the fuse insert partly pulled out 12 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Ultrasonic echoscope Connection ports on the rear side of GS200 GS200i The device operates using mains supply voltage Contact with live parts is extremely danger ous and may even cause death Switch offthe device and disconnect the mains supply cable from the socket before pulling out the fuse insert Only replace the fuse by a fuse of the type specified in the manual Use of incorrect or unsuit able fuse types may cause fire hazards 4 4 2 External triggering In general triggering of the ultrasonic probes for generation of pulses is either performed internally at a fixed frequency value of 500 Hz stand alone mode or based on a pulse repetition rate which can be set and adjusted in the GS EchoView software PRF page 30 Moreover there is an external trig
41. fies the frequency at which the ultrasonic signal is to be sampled and processed If only the ultrasonic signal is requested the trigger frequency that can be measured at the trigger output on the front side of the echoscope is approximately corre sponding to the PRF value If the TGC signal is additionally requested the trigger frequency meas ured is double the specified PRF value e In CT mode the PRF parameter is not applicable since triggering is initiated by a different method Additionals Averaging In measurement mode the data sequences of the individual ultrasonic scans requested by the pro gram are written into a buffer memory The value of the Averaging parameter defines the number of buffered data sequences for which an average Is calculated With every new data sequence the aver age values are re calculated with the oldest measured values being pushed out of the buffer The method of moving averaging of the measurement signals results in the measurement signals being smoothed out due to interferences in the measurement signal being suppressed and variations and noise on the signal being reduced In order to avoid the disadvantages of smoothing particularly with high Averaging values i e g slow reaction to fast or sudden changes for measurements with moved or moving ul trasonic transducers or examination objects the Averaging parameter is only used in A mode 5 3 3 2 USB tab During program start the program scan
42. ftware Echoscope operation with single element transducers GS200 GS200i 5 3 5 A mode As described above the GS EchoView measurement software is always started up in A mode In this program mode it is possible to perform ultrasonic measurements according to the A scan method in pulse echo mode reflection or in through transmission mode transmission GS EchoYiew A mode Exit About Print Armode B mode M mode CT mode Imaging Freeze A scan selection HF Both Params Draw i gt 1 z A s width MHz Gate form Middle Width Gate form Depth ps C cursor Distance Gap Interval ps Fig 39 Program view in A mode operation The parameters for measurements are set and adjusted in the Params tab and with the help of the control elements on the front side of the echoscope Start measurement operation as is described in chapter 5 3 1 Then the echoscope will continuously perform ultrasonic scans and provide the measurement data for transfer to the PC The GS EchoView program retrieves the provided measurement data from the echoscope and displays them in a graph ic chart The Frame rate displayed in the info panel specifies the update rate of the diagrams i e the number of data sequences that can be actually displayed by the program For illustration and evaluation of the measurement data in A mode of the program four diagrams are available A scan Dial TGC Dia2 Spectrum FFT Dia3 and Cepstrum
43. g of the probe ports 6 and 2 as transmitting output receiving input or both is carried out with the help of rotary switch 4 figure 2 Receiver transmitter setting Switch position Transmitter Receiver Mode of operation 111 Probe 1 Probe 1 Reflection 112 Probe 1 Probe 2 Transmission 211 Probe 2 Probe 1 Transmission 212 Probe 2 Probe 2 Reflection For transmission measurements we recommend always using ultrasound probes of the same type and frequency 4 3 2 TGC unit Time Gain Control Sound undergoes attenuation during propagation within a medium Sound attenuation results ina decrease of the sound signal intensity with increasing run time or depth By means of TGC Time Gain Control referring to a time dependent or depth dependent gain it is possible to partly compensate for attenuation of the intensity of the ultrasound signal In this way it is possible to amplify and visu alize echoes of deep discontinuities The following TGC parameters may be modified by means of the rotary switches 11 to 14 figure 2 8 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Ultrasonic echoscope Control elements on the front side THRESHOLD rotary switch 10 Threshold value for the starting point of TGC WIDE rotary switch 9 Width i e the time or depth range to which the TGC is applied SLOPE rotary switch 7 Gradient of the gain dB us or dB mm START rotary switch 8 Starting point of th
44. gering option available for the echoscope The external trigger is connected to the echoscope via BNC input 2 figure 7 on the rear side of the device A y 2 Fig 9 Switch and BNC port for an external trigger left switched off right switched on In stand alone operation change over of the echoscope to an external trigger is performed by means of switch 1 see figures 7 and 9 that is located directly above the BNC port In PC operation the external triggering option is used for synchronization of the mechanical move ments of the CT scanner with the ultrasonic measurement processes of the echoscope e g in CT mode chapter 5 3 8 Here switch over to external triggering is automatically executed by the soft ware With the trigger switch being switched on the echoscope expects an external trigger signal both in stand alone operation and in PC operation with the GS EchoView software There Jore the trigger switch ought to be used in stand alone operation only In PC operation the trigger switch on the rear side ofthe echoscope should generally always be switched off fig ure 9 left image and switch over to external triggering should be made in the software Ultrasonic echoscope GS200 GS200i User manual version 0 60 13 Ultrasonic echoscope Ultrasonic probes 4 5 Ultrasonic probes 4 5 1 Single element transducers GS200 GS200i For GS200 GS200i single element transducers are available at nominal frequencies of 1 2
45. h reales 65 EXDerimentsa u ee 67 Technical 433 2 anbauen 8 1 ECHOSCOPE erarbeiten 68 8 2 Ultrasonic probes u sche 69 BS CGS VICES as er ee ler 69 Eternal Be E et tree7 Revisions of the user manual ccccscccccccccccccccccccccccsccccsccssccccccsssccsces 10 i eS Eaa erry I GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Table of Contents Please read through the whole user manual before using the device and e accessories Ultrasonic echoscope GS200 GS200i User manual version 0 60 3 Safety information 1 Safety information Priorto takingthe ultrasonic echoscope and the accessories into operation please carefully read the notes below to ensure your own health and safety and operational safety ofthe device gt The opening slits on the device are for ventilation and must be kept absolutely free in order to prevent the device from overheating It is recommended to use the folding feet on the device Make sure thatthe voltage values and fusing stated for the device are adhered to in the elec tricity supply Never try to insert objects through the openings on the device because this can lead to short circuits or electric shocks Only the ultrasonic transducers supplied by GAMPT mbH must be connected to the ports named PROBE 1 and PROBE 2 Caution During transmission mode voltage up to 300 V may be applied to the ports Attention th
46. he check box next to the equal 52 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i sign must be activated In this way the time values on the x axis are converted to paths and or distances see figure 51 time coordinates on the left location coordinates on the right i The prerequisite for allocation of time coordinates to location coordinates is that the scan must be performed at consistent speed And the start and stop times must match the dis tance However slight deviations may occur during assessment using the measuring cursor Selection of the measuring signal to be coded In general B scan images are generated by coding of the amplitude signal i e the envelope of the actual ultrasonic signal In the program this is performed if the Amp or Both view option is set for the A scan diagram In contrast to that in HF view the measured ultrasonic signal is coded This result in ultrasonic images similar to those e g known from TOFD measurements in non destructive material testing see figure below GS EchoYiew B mode Exit About Print 4 scan selection HF Amp Both Start B scan A mode B mode M mode CT mode Imaging Params USB Draw B mode Show levels Gray scale Auto min max Level min 0 4 F gt Measurement time 13 45 s ee Fig 52 Grey value coding of the HF
47. hoYiew A mode emode B mode M mode CT mode Imaging amp mode Params Sample rate in MHz 100 25 e 50 10 Measurement range Begin ys 0 gt End us 100 gt Sound Velocity mis 1480 gt unit in diagrams us mm Begin mm End mm delete Yoffset Averaging 1 gt PRF Hz 10 gt Save Parameters Load Parameters Fig 27 Tab for measuring and program parameters Ultrasonic echoscope GS200 GS200i User manual version 0 60 27 Software Echoscope operation with single element transducers GS200 GS200i The parameters and functions are grouped by topics in the following tabs Tab Description Params Basic parameters and generally all measuring and auxiliary parameters for A scans applicable in all program modes chapter 5 3 3 1 USB Functions for inspection and resetting of USB connections between the echo scope andtheCT control unit Change over between on line and simulation mode ofthe program chapter 5 3 3 2 Draw Basic color settings for all diagrams Storage options for the diagram settings chapter 5 3 3 3 A mode Parameters settings and functions for performance and evaluation of ultra sonic measurements according to the A scan method chapter 5 3 5 B mode Parameters and settings for generation and evaluation of manually created B scans using single element transducers chapter 5 3 6 M mode Parameters and settings for generation and evaluation of ultraso
48. ice information Gain 38 Operating mode 37 Output 38 Ultrasonic transducers connected 38 Diagrams Settings 35 Tool bars 19 Zooming 20 Diagrams GS EchoView 23 E Echoscopes Technical data 71 F Frequency filter 47 Frequency spectrum 46 Fuse 13 G GAIN control element 8 GS200 6 71 GS200i 6 71 GS EchoView 18 Imaging module 6 M Measurement range 29 Measuring accuracy A scan 45 Measuring cursors GS EchoView 23 71 Index Measuring mode GS EchoView 27 M mode Temporalresolution 56 Time window 56 MONITOR 11 O OUTPUT control element 8 P Power supply connection 13 Power supply unit 7 PRF 31 Program mode A mode 42 B mode 52 CT mode 57 M mode 55 R Receiver 7 8 RECEIVER control elements 8 Receiver gain 8 Reflection 8 Resolution A scan Amplitude 45 Time of flight 45 S Safety information 4 Sampling rate 29 Scanner status 41 Scope of delivery 4 Single element transducers 15 27 SLOPE control element 9 Software 18 Diagrams 19 Function switches 19 General program structure 18 72 GAMPT mbH Hallesche Stra e 99F Measuring parameters 28 Printing 24 Program parameters 28 Program start 25 Simulation mode 26 Tabs 29 Sound velocity 31 START control element 9 Status information Averaging 40 Data source 39 FFT filtering 39 Frame rate 41 Signal overdrive 39 Triggering 38 T Tabs CT mode 58 Params 29 USB 32 Tabs GS EchoView Dra
49. if the program detects the connected CT control unit GAMPT 60210 In older program versions the functions can be found in the CT mode tab User manual version 0 60 35 Software Echoscope operation with single element transducers GS200 GS200i 5 3 4 Information on device settings and program status On the right side ofthe program window information on the status ofthe measuring system is dis played in the info panel Refresh The displayed information is constantly updated during measuring operation Data transfer between the PC and echoscope is not taking place in stand by mode In this case the display can be manually updated after a change or modification replacement of a probe change in the transmission level and gain change of program parameters etc by means of the Refresh button 5 3 4 1 Device information Front panel The Front panel group displays information on the connected ultrasonic transducers and on device settings that are performed at the front side of the echoscope Operating mode of the echoscope Mode Mode Mode Mode Ti Ri Ti R T2 Ri Tz Rz reflection transmission transmission reflection The Mode display field provides information on the set operating mode of the echoscope reflection or through transmission and on the mode of application of the connected ultrasonic transducers In the display the letter T is for transmitter R is for receiver and the number refers to the probe connec tion port at the
50. ignal for transmission measurement The measuring data of the transmis sion measurements are called up by the measurement software and stored in a buffer memory Evaluation of the transmission measurements is only performed after completion of the respective scan cycle A scan Dia 11 Only A scans are up dated Measuring values are not marked by means of the measuring cursors Attenuation Sound velocity Dia 13 The measuring points or measuring curves for sound attenuation and sound velocity for one scan cycle are only calculated and displayed after completion of the scan cycle Tomograms The CT images are up dated after every scan cycle The CT measurement can only be inter rupted after a complete scan cycle for one angle setting Fora CT measurement with external triggering by the CT control unit the BNC sockets on the rear sides of the echoscope and the CT control unit have to be connected by using a BNC ca 60 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i 5 3 8 4 Procedure of a CT measurement Step 1 Verifying the connection with the CT control unit At first it is important to verify that communication with the CT control unit is operable in addition to the connection with the GS200 GS200i chapter 5 3 3 2 USB tab CT control Online Simulation wf Use scanner Make sur
51. info panel After initialization is completed the program is in stand by mode GS EchoYiew A mode Exit About Print BEN Brmode B mode M mode CT mode Imaging Start 4 scan Greeee Refresh 4 scan selection tont pa HF mp ie Both Mode T2 R2 reflection Output 10 dB Params USB Draw iy rae ver DESPA VITA T Gain Diagram se RER 10 dB ia 3 Probe 1 nnn m Probe 2 ee 2 MHz Middle MHz Width MHz Trigger intern Gate form FET Filter on Online data FFT filter off Middle 0 HF data in Width 20 0 gt range DIT Average Gate form 20 gt g Gepstriin kitern Frame rate Fig 24 GS EchoView after program start The program is always started in A mode Starting there all other activities or evaluations can be selected and started In stand by mode of the program the info panel is not updated e g during probe replace ment change of the transmission level or gain level etc since no data transfer is taking place between the program and the echoscope However with the help of the Refresh switch it is possible to force an update of the info panel without having to change the program to measuring mode 24 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Program start 5 2 2 S mulation mode The software is equipped with a simulation mode that is activated if no echoscope is connected or if the connected device is off
52. itch D BNC outputs for oscilloscope transmitter receiver 11 Trigger signal 5 Rotary switch for 12 TGCsignal receiver gain 13 Ultrasonic signal 6 Probe port 1 14 A scan signal The control elements on the front side of the echoscope do not have any effect on the exten sion module of GS200i In the imaging mode of the GS200i all settings transmitting level gain TGC are performed via the measuring and control software GS EchoView Ultrasonic echoscope GS200 GS200i User manual version 0 60 7 Ultrasonic echoscope Control elements on the front side 4 3 1 Receiver transmitter unit RECEIVER TRANSMITTER Two rotary switches are provided on the front side ofthe device for adjustment of transmitting level and receiver gain The transmitting level OUTPUT is adjusted by means of rotary switch 3 figure 2 It can be increased in 5 dB increments up to 30 dB with the maximum transmitting level of 30 dB corresponding to an output voltage of approx 300 Volt i If the transmitting level is set to a lower level or to zero OFF it will take a few seconds until the actual transmitting output effectively drops to the set lower value this drop lag depends on the magnitude of the change Setting of the receiver gain GAIN is performed by means of rotary switch 5 figure 2 It can be ad justed within a range from 0 to 35 dB in increments of 5 dB Selection of the mode of operation reflection or transmission i e switchin
53. itch for correct mechanical functioning 66 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Experiments 7 Experiments The list below contains suggestions on experiments that can be performed using the GS200 GS200i and corresponding accessories Brief descriptions of and information on the required equipment with regard to set up or for performance is provided in our catalogue and on our website Physical basics PHYO1 PHYO2 PHYO3 PHYO4 PHYO5 PHYO6 PHYO7 PHY08 PHYO9 PHY10 PHY20 PHY21 PHY22 INDO1 INDO3 INDO6 INDO7 INDO8 INDOS Basics of pulse echo method A Scan Sound velocity in solids Acoustic attenuation in solids Acoustic attenuation in liquids Spectral investigations Frequency dependence of resolution power Shear waves in solids Ultrasonic B scan Ultrasonic computer tomography CT Characteristics of sound field Determination of focus zone Reflection and transmission at boundaries Phase shift and resonance effects Industrial applications Non Destructive Testing NDT Level measurement Angle beam testing Crack depth determination TOFD Detection of discontinuities Transit time flow meter Medical Applications MEDO1 Ultrasonic TM mode echocardiography MEDO2 Ultrasonic imaging at breast phantom mammasonography MEDO4 Biometry at the eye phantom Only GS200i MEDO7 Experiment for the ultrasound test phantom MEDO8 Experiment for the ultraso
54. l single measurements shots for one an gle setting The number of single measurements per scan cycle is defined by the parameters Length and Accuracy Ultrasonic echoscope GS200 GS200i User manual version 0 60 61 Software Echoscope operation with single element transducers GS200 GS200i If the Shot break check box is set the program interrupts in dependence on the type of triggering either the CT measurement after every single measurement internal triggering or the update of diagram Dial3 after every evaluation step of a single measurement see also table on page 60 Bestatigen Status connection to GS200 checked connection to Scanner Control checked external trigger selected 1 Move Scanner to start position 2 Be sure scan path is Free both end position switches Far away 3 Be sure TGC is off or have constant level Stark Scans nen Fig 59 Check list for the start of the CT measurement Directly after start of the CT measurement the program requires the user to 1 position the CT sample i e the motor carriage in the middle between the two ultrasonic transducers using switches at the front side of the CT control unit 2 inspect the motor carriage for freedom of movement with regard to the limit switches and end stops and 3 checking the TGC settings After positive confirmation of the Check list in figure 59 the motor carriage travels to its start posi tion by Length 2 and s
55. le element transducers GS200 GS200i 5 3 6 B mode In B mode of the GS EchoView program it is possible to record B rightness scan images using single element transducers The figure below illustrates a B scan of an acrylic test block GAMPT 10201 GS EchoYiew B mode Exit About Print a Parameters 4 scan selection HF Amp Both Start B scan M mode CT mode Imaging B scan A scan Params USB Draw l B mode v Show levels r a a O O ad We TEE 14 L v Gray scale Depth mm r ins pan oo qn te jek v Auto minimax St rn ur mn th f ar CJ Level min Level max Measurement time s Path length mm 12 3 gt D 2 G 8 12 4 6 18 20 1 00 0 50 0 00 0 50 1 00 00 100 200 30 0 Time s _ curso Amplitude V curso TGC dB Fig 50 Program view in B mode operation Three diagrams are available for evaluation B scan Dia 1 A scan Dia 2 and TGC Dia 3 A scan and TGC diagram are adapted to the B scan diagram in terms of alignment In this way it is possible to directly track generation of a B scan image by stringing together gray value or color value coded amplitude scans The actual start of recording a B scan image B scan measurement is triggered by means of the Start B scan button Subsequently the ultrasonic transducer is manually evenly pulled over the surface of the test object along the desired intersection line The measurement is stopped by
56. le element transducers for example required for non destructive material testing NDT The range of application of these devices is extended by far if they are connected to a computer and operated using the GS EchoView measuring and control software On the one hand the software allows for direct control of the echoscopes and auxiliary devices CT scanner On the other hand the program ensures substantial assessment and detailed imaging of the measured ultrasonic signals The software is designed such that it ensures clear tracking of the process path from the measured ultrasonic signal to an A scan B scan regardless of the use of an array transducer or manual use with single element transducers TM scan or ultrasonic computer tomogram Various ultrasonic probes and a considerable range of test objects and other accessories allow fora large variety of practical experiment set ups with regard to physical principles of ultrasound the principle of imaging processes or for industrial and medical applications Ultrasonic echoscope GS200 GS200i User manual version 0 60 5 Ultrasonic echoscope The basic unit GS200 4 Ultrasonic echoscope 4 1 The basic unit GS200 The new product range of ultrasonic echoscopes produced from 2014 currently comprises two device models GS200 and GS200i The basic unit GS200 GAMPT Scan 200 is a high resolution A scan device and represents the basic configuration of echoscopes within this product range The GS200
57. line i e fault in the USB connection device switched off etc In this case a warning is displayed upon program start figure 25 Warnung Connection status Program Found no connection to device and will be switched to simulation mode in simulation mode online parameters will be lost Repeat Connection Check Fig 25 Warning displayed at connection fault or aborted connection In that case the user has the following possibilities A Inspection of the connection to the echoscope USB and mains cable device switched on and subsequently attempt to re establish the connection B The program is directly started in simulation mode If the echoscope is correctly connected and switched on but it is still not possible to establish a con nection the USB settings of the program must be checked For that purpose the program is started in simulation mode and the USB tab is called up in the parameter panel see chapter 5 3 3 2 from page 31 The program behavior described above also occurs if the connection between the echoscope and the computer program is lost during program operation Simulation data The software also contains simulation data that are used for simulating ultrasonic measurements Depending on the program mode some of the display and evaluation functions may be directly ap plied to the simulation data l By carrying out simulated measurements using the simulation data saved measuring pa rameters
58. ly track movements and modifications of a structure under test over a longer period Temporal resolution of the TM scan depends on the set PRF value and is mainly limited by the maximum possible frame rate of the program Ultrasonic echoscope GS200 GS200i User manual version 0 60 55 Software Echoscope operation with single element transducers GS200 GS200i 5 3 8 CT mode We are sure that the contemplation in this chapter is also interesting for users who do not use a CT scanner However it must be noted that the measurements described in this chapter can only be performed using a CT scanner GAMPT 60200 and the corresponding controller unit GAMPT 60210 see chapter 6 1 CT equipment In simulation mode the CT program is also operable without any hardware connected Fig 54 Echoscope with CT equipment 5 3 8 1 Ultrasonic computer tomography X ray CT MRT and PET are computer aided imaging methods that are used in medical industrial and research fields of application Processes such as radiation absorption nuclear magnetic resonance or particle emission are used to generate cross sectional images by means of measurable physical quantities Ultrasonic computer tomography is another CT method It differentiates from X ray CT in thatthe attenuation of ultrasonic signals is measured in the object under test instead of attenuation of x rays However the evaluation algorithms are identical and even any occurring arti
59. mage width s 10 0 gop 44 0 000 wat n i i Amplitude V Fig 53 Program view in M mode operation The actual start of recording a TM scan is triggered by means of the Start M scan button The meas urement is stopped by actuating the button again which is named Stop M scan while the TM scan is performed After completion of the TM scan measurement the measuring cursors and the tools of the diagram tool bar can be used for evaluation of the B scan image 54 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i e During a TM measurement all other switches diagram tools and measuring cursors are de i activated If the program is still in stand by mode when the measurement is started it is automatically switched to measuring mode After completion of the measurement the program will re main in measuring mode i e the program continues to perform amplitude scans Time window of an M scan While the B scan image always consists of all amplitude scans of the measurement the TM scan im age only comprises a certain number of amplitude scans The size of the mapped time window of the TM scan is set in the M mode tab by means of the Image width parameter For example a value of 10 sec means that the TM scan comprises the amplitude scans of the last 10 seconds This makes it possible to optimally and prompt
60. mation In operating condition this FFT filter is directly applied to the measuring signal see description Frequency spectrum and frequency filter on page 45 Status of HF data HF data in HF data range Overrun For digitization in the echoscope the analogue ultrasonic measuring signal is limited to a voltage range between 1 Volt and 1 Volt All voltage values that are higher and lower are cut out figure 36 and 37 This kind of overdriving of the measurement signal by exceeding transmission output or exceeding gain is indicated as HF data overrun in the status display Since the envelope Amp signal of the ultrasonic measurement signal is also calculated in cases where the measurement signal is overdrived the HF data overrun status message must always be taken into account Particularly for amplitude measurements the transmission level and gain level must be selected such that the voltage amplitude of the measurement signal does not exceed 1 Volt 38 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i GS EchoYiew A mode About Print Brmode B mode M mode CT mode Imaging Refresh gg D QQ QQ Ot Front panel 7132 3 0 88 a i 7 Da j Trigger intern Online data FFT fiter off Amplitude V HF data in range Average off Frame rate 5 Hz Depth ps l u 2 j K gaMPT
61. ms USB Draw Params USB Draw B mode B mode Diagram selection Diagram selection Levels l Levels v Show levels v Show levels T N e amp O KIN rN J oO ah 4 oO to on oO a ee v Gray scale Gray scale n eb am v Auto min max v Auto minimax Level min Level min Level max 1 0 Level max 1 1 Image width Image width Measurement time 21 15 s Measurement time 21 15 s Path length mm 12 3 erry v Path length mm 12 3 4 gt Time s Fig 51 Grey value color value coding and allocation of time location coordinates to a B scan measurement Time location coordinates of a B scan y axis The y axis of the B scan diagram is used for mapping of the time of flight or the depth Selec tion is again made by setting the diagram unit usec or mm for the A scan in the Params tab For correct conversion of time of flight and depth the correct sound velocity of the medium through which ultrasound is transmitted must naturally also be specified x axis With B scan measurement the duration of the measurement is recorded and displayed in the Image width group in the B mode tab If the length of the intersection line of the B scan along which the ultrasonic transducer was moved is known the measured time values can be assigned to local coordinates For that purpose the path length must be specified and t
62. ms la t en ee dsnter 28 533 322 USB TOD Neben 31 DI a Draw OD ass 32 23 6 Saner Daseins 35 5 3 4 Information on device settings and program statuS sssessssesessssesessesesseseses 36 5 3 4 1 Device information Front panel essessessessonsnnsnnsnnsnnennennnnnennnnnn 36 5 3 4 2 Information on program and measuring operation zereresessereneeenenn 37 32 3 ScanNerstalls nn ER 40 53 3 N NO ee es ace ah onesies Eee E E R 41 5 3 5 1 Time of flight and amplitude measureMents ceceeeecececeeeeceeeeees 42 5 3 522 Measunne accUrayaassent neun 44 5 3 5 3 Frequency spectrum and frequency filter ssssssessssessssessseessseeesses 45 53k Cepstrumtand CepstrUm filter aussen Ba dal 48 53 6 IB Mol asien sao nsatantensane Sienaauesionecas ioewates 51 93 1 MMO realen etwas 54 53 8 CEMO ee ee essen 56 5 3 8 1 Ultrasonic computer tomography sssssssssssesessessessesessessessessesesseses 56 Sda CMO de ab area 57 5 3 8 3 Internal and external triggering Of CT SCaNS ssssessessessesessessesseseee 59 5 3 8 4 Procedure ofa CT measurement au 61 Accessories a u o s a o ess aa a a e lt c lt c c c 0 00 00 sooeeses sa oo gt 0 oooo ooso es2 oa oassoooea oao c a c 00oss s 0 o 64 6 1 CT eauipmenti a uunseate a E 64 Gite CTEONErO UN EU CZ OD vices usestic cade a a euaudascadbendesanecs 64 62 Cl SCAN C
63. nic images according to the Time Motion method chapter 5 3 7 CT mode Parameters and settings for generation and visualization of ultrasonic com puter tomograms chapter 5 3 8 Scanner Scanner moving functions chapter 5 3 3 4 5 3 3 1 Params tab The Params tab includes measuring and software parameters that apply for all four program modes Within the tab the individual parameters are classified in two groups A scan parameters and Addi tionals A scan parameters Sample rate The analogue measuring signals are digitized in the echoscope for data transmission via the USB in terface For digitizing the user can select one of the four sampling rates available 10 25 50 or 100 MHz see figure 28 A scan parameters Measurement range Begin End ps The measurement range represents the run time range of an ultrasonic signal or the depth range of the ultrasonic measurement that is measured and recorded by the echoscope The range is defined by means of a beginning value in us Begin and an end value in us End The maximum measurement range End minus Begin depends on the selected sampling rate 28 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Sample rate in MHz 100 io 25 Echoscope operation with single element transducers GS200 GS200i 3100 25 Fig 28 Ultrasonic echo pulse digitized at sampling rates of 10 and 100 MHz 4 MHz probe Me
64. ntains functions for copying printing and sav ing or for adjustment of the graphic display of the measuring data curve type color dots etc The other group provides zoom functions 18 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software General program structure If the mouse cursor is moved over the x or y axis the respective tool bar is opened The axis tool bars only contain zoom functions for the respective axis Overview of diagram tools Main tool bar 1 Hold Resume Interrupting II or continuing the diagram update 1 2 345 6 Switch over between the following mouse modes Mouse Shift Shifting the contents of a window i e 7 8 9101112 a zoomed diagram in the diagram window a Mouse Zoom Opening the zoom window in the diagram 3 Copy copying the diagram into the Windows buffer memory 4 Print printing diagrams x axis tool bar 5 Save saving the diagram as BMP or JPEG file 6 Setup calling up the diagram settings 7 Zoom In zooming into the diagram 8 Zoom Out zooming out of the diagram 9 Zoom Auto automatic zoom or resetting the diagram scales to standard values depending on the diagram contents 10 Backward Zoom History going back by one zoom step y axis tool bar 11 Forward Zoom History going forward by one zoom step 12 Setting for the type of zoom window that can be opened with the help ofthe mouse j Opening any zoom window
65. ofa previous on line measurement are overwritten Use the save and load func er tions for parameters in Additionals in the Params tab Ultrasonic echoscope GS200 GS200i User manual version 0 60 25 Software Echoscope operation with single element transducers GS200 GS200i 5 3 Echoscope operation with single element transducers GS200 GS200i 5 3 1 Starting interrupting and completing the measuring mode After program start is completed the program is in stand by mode There is no data transfer taking place from and to the echoscope Only by clicking the Start A scan button the program changes to measuring mode In measuring mode the echoscope continuously performs ultrasonic scans The analogue measuring signals are digitized in the echoscope and provided for data transfer to the computer via the USB interface The digitized measuring data are constantly retrieved processed and visualized by the program in the form of curves or as ultrasonic image in diagrams Clicking the Start A scan button again stops the measuring operation In B M and CT mode the measuring system is automatically switched to measuring opera tion upon start ofa B M or CT scan For stopping the measuring operation the current B M or CT scan must be previously stopped While the Hold Resume tool ofthe diagrams page 19 only interrupts the update function ofthe diagrams the Freeze button interrupts the entire measuring operation ofthe prog
66. one 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i GS EchoYiew A mode Serpe oot eee NET NE TEE EIN Diag tet All diagrams settings Auto load Auto save Load Save Select scheme Dark Bright Change colors All default colors Fig 32 Basic color scheme Dark GS EchoYiew A mode Spectrum FFT All diagrams settings Auto load Auto save Amplitude V Load Save Select scheme Dark Change colors 20 0 30 0 40 0 50 0 60 0 All default colors Depth ps Here a 13 53 1 000 54 12 1 000 40 59 2 000 Frequency MHz Fig 33 Basic color scheme Bright ME The background and foreground colors of the two color schemes can be adjusted by means of the Background and Axes text buttons Clicking one of the buttons opens a selection window in which the required color adjustments can be made Ultrasonic echoscope GS200 GS200i User manual version 0 60 33 Software Echoscope operation with single element transducers GS200 GS200i All default colors The All default colors button resets the color values of both schemes to standard values The settings of the two color schemes are applicable for all diagrams in A mode B mode M i mode and CT mode and are automatically saved when closing the program All other settings of the diagrams are separately performed in the set up menu of the respective dia gram chapter 5 1 3 1 Diagram
67. r curve and the filtered spectrum are displayed in the spectrum diagram in addition to the spectrum itself The filtered frequency spectrum is calculated backwards using an inverse FFT In the A scan diagram only filtered measuring data are displayed 46 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i CI FFT range Ascan Lage Spann FFT 1 00 0 8 oso 25 Oo o a 0 60 20 0 Trigger intern Params USB Draw A mode a ie Online data sili a 0 20 15 0 No are FFT fiter off PoC ee z E 0 20 10 0 Middle mnz fzo 4 gt lt HF data in range 0 40 75 width MHz fos a gt verage 0 60 50 off Gate form 2 LT Frame rate 0 80 25 i FFT filter on i 100 0 0 00 100 20 300 400 500 0 00 1 00 2 00 300 4 00 5 00 6 00 7 00 8 00 gaMPT ASSES A MAE O cursor Depth ps O cursor Frequency MHz een OFFTrange Ascan with FFT filter Lasse Sem FFT 1 00 350 0 80 25 o Status 0 60 20 0 Trigger intern Params USB Draw A mode ann ie Online data Veen a 0 20 15 0 ee Bu FET fiter on hin E 0 20 10 0 Middle mn fjue a gt HF data in range 040 75 A width MHz 0 5 Jo verage 060 50 off Gate form 2 T gt ya oe Frame rate a 1 00 0 0 pg eed WE
68. ram and device status 5 1 2 Function switches Program functions and operations such as starting ofthe measuring operation switch over to an other program mode update of data in the info panel etc are called up by means of switches Depending on the function switches may provide different performance and layout options Possible switch conditions are described below Condition Layout Description 1 ErEErE Switch is deactivated function action cannot be carried out 2 Freeze Switch is activated function action can be called up 2 3 Freeze Switch is activated function action is being carried out Some functions automatically reset the switch to condition 2 after performance of the action Other functions and actions must be directly completed by clicking the buttons In certain situations it is not possible to access switches although they are in condition 2 or 3 For example in B M or CT mode it is not possible to access the Start A scan and Freeze switches or the switches for changing the program mode during a B scan M scan or CT measurement 5 1 3 Diagrams e The following descriptions refer to the diagrams in A B M and CT mode of the GS EchoView i program 5 1 3 1 Diagram tool bars Configuration and control of the diagrams is performed via the tool bars When moving the mouse cursor over a diagram the main tool bar is displayed in it upper right cor ner It comprises two icon groups The upper group co
69. ram and echo scope In that case the echoscope will stop triggering and generation of ultrasonic pulses Moreover the data transfer from and to the echoscope is interrupted l e the measuring operation is virtually frozen Clickingthe Freeze button again the measuring operation is continued During performance ofa B M or CT measurement interruption of the measuring operation i by means of the Freeze button is not possible 5 3 2 Visualization of the measurement signals in an A scan diagram For graphic illustration of ultrasonic signals in A scan diagrams three different methods are available figure 26 HF Only the ultrasonic signal i e the digitized measuring signal is displayed Amp Only the amplitude signal i e the envelope of the ultrasonic signal calculated by the program is displayed Both Both the ultrasonic and the amplitude signal are displayed 26 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i A scan Se cn N selection Amp Fig 26 Display modes of an amplitude scan 5 3 3 Measuring and program parameters In the Parameters field on the left side of the program interface almost all functions parameters and setting options are provided that are required for performance recording and evaluation of ul trasonic measurements using the 1 2 or 4 MHz ultrasonic probes GS Ec
70. rials is no problem especially for examination of liquids The high resolution and associated spectral bandwidth make these ultrasonic probes required for examinations of thin plates for exam ple 14 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Ultrasonic echoscope Ultrasonic probes The ultrasonic probes are hardware coded in accordance with their frequency values so thatthey can be automatically identified by the measuring system All ultrasonic probes have a robust metal housing and the sound output surface is made of water resistance casting material The probes are equipped with robust special plugs for connection with the echoscope Fig 11 Connecting a single element transducer to GS200 GS200i I When establishing or when disconnecting the connection between an ultrasonic transducer and the echoscope the connection plug ofthe transducer must be specifically held as illus trated in Fig 11 Tensile load acting on the connection cable must be avoided to prevent dis connection ofthe cable from the connector piece 4 5 2 Array transducer GS200i The scope of delivery of the GS200i includes an ultrasonic array transducer similar to those used e g in medicine for examination of the abdomen The ultrasonic transducer comprises an array of 64 individual elements arranged in a convex struc ture For control of the array transducer and for recording and processing of signal
71. rig d Wi Pos 40 40 us MEASURE k TRIGGER CH1 wee g Hone TRIGGER CH1 CH2 2 None TGC CH2 AM E EE ERE CH3 None US SIGNAL US SIGNAL CH3 CH4 None lt lt l A SCAN CH4 aot ur RE Tee CH1 5 00 CH2 500m M100us CHI Ler CHS 1 00 CHI 500m 14 May 14 14 42 463 635Hz Fig 6 BNC outputs and appertaining oscilloscope signals In stand alone operation without external triggering activation of an ultrasonic transducer con nected to the front side of the GS200 GS200i is performed by means of a fixed trigger frequency of 500 Hz pulse repetition period 2 ms For this frequency a fixed value is specified in the firmware and it is not possible to set or adjust this value at the device For PC operation including the GS EchoView program setting and adjustment of this trigger fre quency is performed by means of the PRF parameter see page 30 Moreover triggering of pulse generation may be performed by an external trigger that is connected to the rear side of the echoscope chapter 4 4 2 Ultrasonic echoscope GS200 GS200i User manual version 0 60 11 Ultrasonic echoscope Connection ports on the rear side of GS200 GS200i 4 4 Connection ports on the rear side of GS200 GS200i a gaMPT Order No GAMPT GS200 esomcesxunons Type Ultrasonic echoscope Made in Germany Serial No 14 008 Voltage 100 240V 50 60Hz Power Rating 1 nA Fuse T 14 zs amp Fig 7 Rear side of GS200 GS200i 1 On o
72. s a separate ex tension module is integrated into the GS200i ultrasonic echoscope The connection port for the array transducer is located on the rear of the GS200i see figures 7 and 13 Ultrasonic echoscope GS200 GS200i User manual version 0 60 15 Ultrasonic echoscope Ultrasonic probes Fig 12 Fig 13 Connection port for the array transducer on the rear side of GS200i The echoscope must be taken out of operation prior to connecting or disconnecting the ultra sonic array transducer 16 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software General program structure 5 Software The scope of delivery of the GS200 GS200i includes the GS EchoView control and measuring software Moreover the current program version Is available on line for download at www gampt de On the one hand the program is used for control of the echoscope and the CT control unit order no 60210 for the CT scanner order no 60200 On the other hand it is used for recording evalua tion and display of the measured data retrieved by the echoscope 5 1 General program structure 5 1 1 User interface of the program The user interface of the echoscope software is generally divided into a maximum of four areas with varying contents depending on the selected program modes Programmfenster Program Window Schalterleiste Button Bar 3 Parameterfeld Diagrammbereich Parameter Pan
73. s the USB interfaces Devices that are connected and switched on echoscope CT control unit are normally detected and connected automatically If it is not possible to establish a connection with the echoscope we recommend starting the program in simulation mode and calling up the USB tab In the tab information on the current connection status and functions for manually establishing a connection with the echoscope or the CT control unitare provided figure 31 To be able to successfully establish a connection with the echoscope and or the CT control I unit the correct USB ID string must be entered into the ID string field The USB ID string is saved in the USB chip of the device Currently valid USB ID strings are GAHS for the echoscope GS200 GS200i and GACT forthe CT control unit Ultrasonic echoscope GS200 GS200i User manual version 0 60 31 Software Echoscope operation with single element transducers GS200 GS200i A B C D Params USE Draw Params USE Draw Params USE Draw Params USE Draw Refresh connection status Refresh connection status Refresh connection status Refresh connection status Echoscope Echoscope Echoscope Echoscope Online Simulation Online Simulation Online Simulation Online e Simulation CT control CT control CT control CT control Online e Simulation Online Simulation Online Simulation Online Simulation ID string SAHS ID string GAHS ID string SAHS ID string SAHS fQHS4 GAHS A GAHA SG4H5 A f G
74. sion 0 60 47 Software Echoscope operation with single element transducers GS200 GS200i The activated frequency filter is not only active in A mode but also in B M and CT mode of the program It has priority over all other evaluations for application on the measurement data transmitted by the echoscope so that all other evaluation steps of the imaging methods A B M and CT are carried out using filtered measurement data Therefore with unfavorable filter settings the generated ultrasonic images may have more or less distinct artifacts or they simply cannot be evaluated figure 47 The frequency filter can only be activated and deactivated in A mode By having the filter status displayed in the info panel it is possible to check frequency filter activity at any time also in other program modes Status info FFT filter on 5 3 5 4 Cepstrum and cepstrum filter Cepstrum The Cepstrum diagram is another option for spectral evaluation in the A mode of the program The cepstrum is generally determined by repeated application of a fast Fourier transformation but this time it is applied to the frequency spectrum described above The name cepstrum originates from the name spectrum with the first four letters being arranged in reverse order The cepstrum analysis provides information repetition of certain intervals within the frequency spec trum these are visualized in cepstrum in the form of peaks Such information may be useful
75. t by the current diagram settings 34 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software 5 3 3 4 Scanner tab Scanner Moving Direction Left Speed Length mm 30 0 gt Angle 90 0 4 2 Move Path More Angle Cancel mowing Define zero point Move to zero point zero path mm 30 d b Fig 35 Control functions for the CT scanner Ultrasonic echoscope GS200 GS200i Echoscope operation with single element transducers GS200 GS200i With the function switches Move Angle and Move Path it is possible to position the motor carriage of the CT scanner and rotate the magnetic plate at the carriage The parameters Speed and Length define the movement speed and path length for the carriage In view of the magnetic plate Speed and Angle define the rotation speed and rotation angle The direction of movement or rotation can be set by selecting one of the options Left or Right Movement or rotation can be stopped at any time by pressing Cancel moving With the Define zero point button the distance between the current carriage position and the right end stop zero point can be determined in millimeters by driving against the end stop and defined as zero point Then this carriage position and any other position between the limits can be approached in a de fined manner by means of the Move to zero point button The Scanner tab is only displayed
76. tarts the first scan Bestatigen Sure to start with external trigger 1 Abbrechen Fig 60 Confirmation request for external triggering If the Use external trigger check box is activated in older program versions see page 59 another prompt for confirming external triggering of the echoscope by the CT control unit is displayed prior to the CT scans 62 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with single element transducers GS200 GS200i Cancel CT Line break Shot break Break CT Cancel CT Line break Shot break Continue CT If using the internal triggering a CT measurement can be interrupted at any time by pressing the Break CT switch To carry on the measurement the Continue CT switch is pressed If using the external triggering a CT measurement can only be interrupted automatically by setting die check boxes Line break and or Shot break If the check box Line break was activated the next scan cycle of an interrupted CT measurement can be carried on by pressing the Continue CT or Continue Line switch Cancel CT wf Line break Shot break Cancel CT Line break of Shot break With Continue Shot the next single measurement at internal triggering or the next evaluation step between two scan cycles at external triggering is carried out To cancel a measurement press the Cancel CT switch After that the motor carriage
77. ter the other For that purpose the object under test is moved forward and backward between the transmitter and receiver Accuracy is calculated from the distance of these measuring points and the scanning path from the sum ofall of these distances After such a scan in our system the object under test is rotated instead of the transmitter receiver system and the next scan is started 5 3 8 2 CT mode tab Equal to the other program modes a special tab is also available for this mode containing the mode specific parameters and functions Diagram selection In CT mode up to nine diagrams are available for evaluation A scan Dia 11 Ultrasonic signal of transmission measurement TGC Dia 12 Time gain control Ultrasonic echoscope GS200 GS200i User manual version 0 60 57 Software Echoscope operation with single element transducers GS200 GS200i Attenuation Sound velocity Dia 13 Measuring curves ofthe sound attenuation or sound velocity measured along the width of a CT scan at unchanged angle setting The measured values are determined relative to the first measuring point last scan amplitude velocity Dias 21 und 31 Color value coded images of the respective scans performed last The images are only updated after completion of a scan amplitude velocity unfiltered Dias 22 und 32 Unfiltered cross sectional CT images that re sult from overlay of all completed scans of the measurement The images are updated after every sc
78. und fetal phantom 67 Ultrasonic echoscope GS200 GS200i User manual version 0 60 Technical data Echoscope 8 Technical data 8 1 Echoscope Basic unit GS200 GAMPT 10400 Frequency range 1 5 MHz Measuring operation Switchable between Reflection pulse echo mode and Transmission mode Transmission signal Dirac pulse lt 1 us max 300 V Transmission output 0 30 dB changeable in 5 dB increments Gain 0 35 dB changeable in 5 dB increments TGC Setting of start time threshold value slope and time of flight range depth range infinitely variable Minimum start time approx 6 usec Maximum time range approx 150 usec Maximum gain approx 30 dB Front side connection 2 connection ports for ultrasonic single element probes ports transmission and receiving mode optionally selectable BNC connection ports for tapping the analogue TRIGGER TGC US SIGNAL and A SCAN signals Rear side connection ports gt Mains connection BNC input for external trigger including on off switch logic level max 5 V Connection port for array transducer GS200i only Mains voltage 100 240 V 50 60 Hz Power consumption Max 100 VA Fuse T 1A EN 60127 2 3 G fuse link time lag 1 ampere 5 x 20 mm Dimensions Approx 256 mm x 169 mm x 327 mm W x H x D Expansion to GS200i GAMPT 10410 Additional component Internal imaging module for array transducers with automatic probe detection Imaging methods B B M 68 GAMPT mb
79. uring data even if the data range for FFT is not highlighted in the A scan diagram In older program versions the vertical measurement lines are used to limit the data range for calculating the frequency spectrum figure 45 Here it should be noted that at measurement of times of flight depths by means of the measurement lines the data range for calculating the FFT spectrum is also changed Spectrum FFT ee ne en en en ar si 45 0 40 0 35 0 30 0 250 20 0 150 10 0 5 0 30 0 40 0 50 0 a Depth ps Tr RW gt 17 24 1 000 23 03 1 000 6 29 2 000 J cursor Frequency MHz Fig 45 Limiting the data range for FFT calculation by using vertical measurement lines in older program ver sions Frequency filter A frequency filter can be superimposed on the frequency spectrum This allows for elimination of certain interfering signal proportions from the measuring signal The frequency filter can be activated and deactivated by means of the FFT Filter on button in the A mode tab figure 46 According to the filter parameters set there a band pass high or low pass and or a band stop filter can be generated The Middle parameter determines the position of the filter on the spectrum and Width determines the filter width The Gate form parameter defines the slopes of the filter edges A value of 0 corresponds to a rectangular shape and negative values result in a band stop filter With the frequency filter activated the filte
80. w 33 Scanner 36 TGC 8 BNC output 11 Control elements 7 Function 10 Slope 9 Starting point 9 Threshold value 9 Width 9 THRESHOLD control element 9 Time Gain Control TGC 8 Time of flight measurement 31 43 Transmission 8 Transmitter 7 8 TRANSMITTER control elements 8 Transmitting level 8 TRIGGER BNC output 11 D 06217 Merseburg Phone 49 3461 2786910 www gampt de Index Triggering External 14 60 Frequency 11 14 Internal 60 Port 13 U Ultrasonic probe 15 16 Ultrasonic probes Technical data 72 USB Ultrasonic echoscope GS200 GS200i User manual version 0 60 Connection port 13 ID string 33 Settings 33 US SIGNAL BNC output 11 W WIDE control element 9 Y Yoffset 31 73
81. with a stepper motor for linear movement of the motor carriage 4 anda second stepper motor for rotation of the magnetic plat 5 The stepper motors are manually con trolled via the CT control unit or by means of the GS EchoView program The motor carriage is equipped with two limit switches for automatic limitation of the travel range and shut down of the stepper motor see figure 64 The appertaining end stops 3 can be optionally positioned 3 k 4 5 6 ee Fig 63 CT scanner status 12 2014 gt Motor carriage Magnetic plat Sample holder 1 Clamping screw 2 Connecting cable 3 End stop S A Oo Wm ti Ultrasonic echoscope GS200 GS200i User manual version 0 60 65 Accessories End points End points Fig 64 Status indication in the GS EchoView software and position of the limit switches left switch free OFF and right switch in end stop position ON Update of the limit switch status indication is performed within the GS EchoView software only after the motor carriage is stopped If the carriage is at an end stop for example and is then moved in the other direction to switch off the limit switch the status display will only change from red to green after the carriage is stopped again If moving the motor carriage is not possible in one direction although the corresponding i limit switch has not yet reached its end stop the first thing to do is to check the sw
82. z Cepstrum filter A cepstrum filter can be superimposed on the cepstrum This filter calculates back transformation of the cepstrum data that are displayed as a bright blue line in the Spectrum FFT diagram with standard settings of the program e g for smoothing out the frequency spectrum Ultrasonic echoscope GS200 GS200i User manual version 0 60 49 Software Echoscope operation with single element transducers GS200 GS200i The cepstrum filter can be activated and deactivated by means of the Cepstrum filter on button in the A mode tab figure 49 The filter parameters Middle Width and Gate form are set equally as de scribed above for frequency filter With the filter activated the filter curve and the filtered cepstrum are also displayed in the cepstrum diagram FFT range 7 7 gt 65 9 us Spectrum FFT 1 00 Params USB Draw A mode DE GE Gr Saeed ees eee eee meee oes 0 00 050 1 00 150 200 250 300 350 400 450 500 C cursor Frequency MHz 2 E E 5 Middle 0 0 4 gt Width 10 0 op Gate form 2 T gt 300 400 500 i i i 10 0 15 0 20 0 Depth mm Distance Gap Interval mm Fig 49 Cepstrum filter activated In contrast to the frequency filter the cepstrum filter does not have any effect on the meas uring data of the ultrasonic scan 50 GAMPT mbH Hallesche Stra e 99F D 06217 Merseburg Phone 49 3461 2786910 www gampt de Software Echoscope operation with sing

Download Pdf Manuals

Related Search

Related Contents

  PRODUCT GUIDE - EdenPURE Service  SPARE PARTS LIST • ERSATzTEILLISTE  tipo UD561 982  StarTech.com INSERTBLANKW patch panel accessory  Manuale Utente - Pride Mobility Products  Pfister F-049-KYCC Use and Care Manual  User Manual  Soehnle 68050  Philips SPP4068D  

Copyright © All rights reserved. Failed to retrieve file