Alternative Design 2 - BME - University of Connecticut
Contents
1. LCD Interface i Touch Display Input Microprocessor Interface Motor Sensors 7 Control Input g Sound Chip E Battery Charger Module Syringe Holder Assembly Batteries i m Figure 22 Automated Syringe Loader Case Rear View 2 Realistic Constraints The intended design to satisfy the problem faced by many diabetic patients with a variety of conditions causes factors based on limitations to be followed when considering not only the pure design of the device but the user s capabilities For the automated syringe loading device health and safety of the user are important to keep in mind when proposing a design The device should be able to impact their lives in a positive way and not compromise what has already been by their disability A constraint that is proposed by this design is the interaction between the user and device input selection A significant problem may arise in trying to interpret user input via touch screen as well as spoken word To overcome such an obstacle it is important for the program to repeat that the information has been received and have it confirmed prior to acting on commands and injecting the syringe with insulin The device is intended to be portable This requires a minimum battery life to be implem2. Figure 12 Flexible Bracket Bottle Holder Insulin es Bottle Pelee lots EEDAN R J Bottle Sere aes Removal Tool Figure 13 Bottle Holder Assembly Figure 14 Bottle Removal Tool 1 2 5 Motor and Potentiometer For this design the plunger will be moved by a brushless DC motor The one selected is the EC 20 Flat Motor Part No 241916 by Maxon Motors http www maxonmotorusa com EC_motor asp It requires 9 Volts of DC potential and will provide the power needed with limited heat and noise This motor will interact with a potentiometer though the use of gears according to the figure below The gears will be on both the motor and the potentiometer The potentiometer selected is the MW22 Wirewound Precision Multi Turn Potentiometer by ETI Systems http www etisystems com mw22 asp This potentiometer has an accuracy tolerance of only 0 09 in some places allowing for excellent precision in distance readings The loading device will use these two devices to pull the plunger of the syringe by according to the user input Once the user has input the amount of insulin desired the device will calculate the distance the plunger must travel to achieve this volume Then the device will calculate the resistance that must be met by the potentiometer to achieve this distance using a preprogrammed function The motor will turn the screw which moves the plunger at the same rate it turns the potentiometer see Fig 15 The resistance readin
3. languages could be provided quickly by downloading different programs and data into the microprocessor and sound chip This can lead to the syringe loading device being able to be used by more people all over the world The customization will allow it to be better tailored to them with ease of use The portability of the intended device allows diabetes patients to explore other opportunities and will give them the confidence that they lacked before regaining such independence Allowing the user to bring the device on day trips and vacations will give them the freedom they may have thought was gone The accuracy of the device will allow insulin users to receive the maximum benefits from a precise amount of required insulin This precision can improve their everyday activities and allow the user to receive the benefits intended by the design The design of the project is meant to appeal to everyone regardless of their familiarly of technology The simple user interface and instructions will deliver an accurate dosing of insulin to all users 5 Life Long Learning In using the CUBLOC component the team will be able to utilize past computer programming techniques to learn BASIC and Ladder Logic languages These two new languages can be combined to implement interwoven programs which can take advantage of both sequential and parallel processing While these languages are relatively easy to learn they are capable of performing the advanced tasks put
4. capable of accessing the memory area of the Ladder Logic program by manipulating data in this area it will be able to initiate Ladder Logic processing in response to data from the sensors and commands from the user 1 1 4 Bottle Holder Flexible metal brackets will bend to conform to the sides of the insulin bottle and hold it top down centered over the syringe needle port A built in removal tool will aid in the extraction of bottles from the device 1 1 5 Motor and Potentiometer A DC motor will be used to pull the plunger of the syringe and fill it to the desired dosage To ensure accuracy the motor will turn a potentiometer while pulling the syringe plunger The computer will read the potentiometer resistance and through the use of a simple math algorithm the microprocessor will be able to tell how far the plunger has been pulled The motor will always be connected to the plunger claw which attaches to the syringe 1 1 6 Syringe Tray and Motor The syringe tray will be made out of lightweight aluminum with groves for the syringe and a slot for the plunger grip to slide though Two sensors will be incorporated into tray one sensor for detecting the presence of the syringe and the other for indicating its size 50 units vs 100 units 1 1 7 Bottle and Syringe Interaction When the computer has reached the step where the syringe connects with the insulin bottle for filling a servo is activated This servo will slide the syringe tray
5. for insertion and removal of the syringe The previous Design accomplished movement of the platform through the use of a linear gear in the current design a screw gear has been implemented Previously the stopping of the servo motor was controlled using a sensor in this design precision movement of the servo will be done using the microprocessor The bottle holding assembly has been altered from the original design instead of implementing an expanding plastic sleeve a housing will be constructed with four flexible metal brackets Additional space with be left between the brackets to make it easier for users to reach in and extract bottles A bottle removal tool will also be incorporated into the housing to further aid users in lifting bottles up and out of the device In Design 1 the sensors for the device were pre built modules that could communicate with the laptop via its USB port In the current design the sensors are constructed using individual electrical components These components will be directly connected to the CUBLOC microprocessor In the Design 1 the energy needs for the various components of the device were met mostly by drawing power directly from the laptop s USB ports In this new design rechargeable batteries will be used to power all of the components of the design 1 1 1 Monitor Touch Screen The monitor used to display prompts and insulin dosage amounts is the IntelliLCD 1TL710 by Comfile It is a fully colored to
6. forth by the requirements of the syringe loading device This allows the team to learn powerful techniques in computer programming The process of designing a circuit that uses the CUBLOC microprocessor and the voice recognition synthesis chips will be very educational The team will be integrating high level circuit components for the first time this will help give us a better understanding for circuit design 6 References 1 DS1302 MAXIM lt http www maxim ic com quick_view2 cfm qv_pk 2685 gt 2 Speech Chip Listens Well Talks Clearly Plays Music Electronic Design lt http electronicdesign com Articles Index cfm AD 1 amp ArticleID 1673 amp pg 1 gt 3 CUBLOC User Manual 2 5 Comfile Technology lt http cubloc com download cubloctouchmanual pdf gt 4 Deployment of Human Machine Dialogue Systems The National Academic Press lt hitp books nap edu openbook php record_id 2308 amp page 392 gt 5 New Fonts For Documents Jenson Harris An Office User Interface Blog lt http blogs msdn com jensenh archive 2005 12 07 501009 aspx gt 6 Can I add voice recognition to my program martin2k lt http www martin2k co uk vb6 tips vb_10 php gt
7. 50 unit syringe has been loaded The servo will be able to move the drawer the specified amount and hold it there until the microprocessor stops sending a signal to it The servo chosen for this task is the Futaba 9252 All Purpose Servo http www gpdealera com cgi bin wgaint100p pgm I RKUTM0222 This device requires 6 volts from the power source Figure 18 The Syringe Drawer When activated by the microprocessor the servo will move everything inside of the rectangle along small tracks imbedded in the device case towards the insulin bottle EN O A E E E E l E E E E E 1 T Figure 18 The Syringe Drawer 1 2 7 1 Orientation Sensor The orientation sensor is a very simple device It consists of a cone a ball bearing and a Omron 3635 Momentary Switch http www sciplus com category cfm subsection 14 category 143 To prevent the accumulation of air bubble inside of the syringe the device will only load the syringe when the bottle is over it The orientation sensor enables the device to check that this arrangement is satisfied When the device is properly positioned the ball bearing will fall on the switch completing a circuit If the circuit is complete the loading process may continue It the circuit is not complete it means the bearing is not on the switch and that the device is not in the correct position In this case loading will not be allowed to commence Figure 5 shows a
8. Alternative Design 2 Report Automatic Syringe Loading Device Team 2 Daniel Littleton Scott Relation Kathryn Tempe October 26 2007 Client Contact Dr John Enderle Biomedical Engineering University of Connecticut Email jenderle bme uconn edu Phone 860 486 5521 Alternative Design Project 2 1 1 Introduction This is an alternative design for an automated syringe loading device The goal of this device is to allow diabetes patients with a variety of disabilities to be able to prepare their insulin injections without requiring any assistance or supervision from others The automated syringe loading device will allow users to specify data and commands though the use of a touch screen display in addition to accepting spoken commands from the user Prompts data and error messages will be presented to the user visually using large characters on an LCD Display and audibly using synthesized speech This design differs from the previous design in several ways Design 1 utilized a laptop as its main component it was used a display a processor and a touch amp sound input device Instead of a laptop the current design uses several individual components to accomplish the same tasks A touch input enabled LCD Display the IntelliLCD is now used to present information graphically to the user and to get touch screen commands from the user A CUBLOC microprocessor the CB 405 will be used to run programs to monitor data from the devic
9. Dimensions in mm With timekeeping chip such as the DC1302 the device will be capable of keeping time stamped records of doses drawn The chip contains a real time clock calendar and 31 bytes of SRAM By a simple serial interface the chip communicates with the CUBLOC The clock operates in either 24 or 12 hour format with AM PM indicators The clock calendar provides seconds minutes hours day date month and year information and is automatically adjusted for months with less than 31 days and also makes corrections for leap year 1 Additional input slots included on the IntelliLCD are a USB host and device ActiveSync RS232 serial port 5 V and a communications speed switch ActiveSync software is used to link IntelliLCD with a PC Although IntelliLCD has a touch screen adding a mouse or keypad by USB port can allow the user to also make selections A USB hub can be used to for the device to control by mouse and keypad IntelliLCD receives data through the RS232 port Programs administered by the IntelliLCD can be built with a CUBLOC chip The chip is attached to a study board that includes two RS232 connection sites BASIC and or Ladder Logic languages encode CUBLOC The advantage of using BASIC is that for those building the program they don t need to be familiar with it in order to use it properly because of its simplicity The language built program can also be tested for operation status or function with IntelliLCD by being conn
10. Dose Amount and Date Time Information Adjust Remaining Bottle Amount Main Menu Figure 11 Menu Flowchart Part 5 1 2 4 Bottle Holder This component needs to securely hold a bottle in a vertical position while a syringe extracts insulin from it In order to accommodate a wide variety of bottle sizes and shapes flexible metal brackets will be created and installed in the device case The top part of each bracket see Fig 12 will be affixed to the top of the case while the bottom arm of the bracket will press against the side of a cylindrical housing Four brackets will be placed within the housing in an equally spaced arrangement When a bottle is lowered into the bottle assembly the brackets will compressed against the sides of the housing Pressure from the brackets against the sides of the bottle will automatically center and secure it into position see Fig 13 When attempting to remove a bottle from the device the space in between the brackets will make it easier for the user to reach down and get a better grip on its sides For those users that may have difficulty in reaching into the device to remove the bottle a bottle removal tool has been incorporated into the assembly s design see Fig 14 The user can pull up on the two straps of the tool to lift the bottle up and out of the assembly In order to allow easy access to the bottle assembly the cover to it will be held in place by two Velcro straps
11. along groves under the tray moving it into position A metal cone will help direct the syringe needle into the opening in the insulin bottle When the syringe has been filled the servo will move the tray back to its original place for removal 1 1 8 Rechargeable Batteries Charger The components for the automated syringe loader will be powered by rechargeable batteries A charger module will be incorporated into the device to allow it to be plugged into a standard wall outlet for charging 1 1 9 Case Layout A plastic case will enclose the automated syringe loading device The front of the case with have a vertically positioned touch screen monitor a microphone and a speaker The bottle loader door on the top on the device and syringe loading door located in the lower right portion of the device will be secured using Velcro flaps 1 2 Subunits 1 2 1 Monitor Touch Screen IntelliLCD The intended monitor for the design is expected to be IntelliLCD 1TL710 by Comfile cubloc com It is relatively inexpensive compared to laptop alternatives Similar to the once considered portable PC IntelliLCD has a screen size of 7 in diagonally The IntelliLCD screen is also colored and is powered by 24 V It features a GB secure digital SD card that is removable and can be upgraded with a maximum of 2 GB Dosage Amount 94 04 Viewing Area 103 6 Figure 1 Example IntelliLCD Interface Design with
12. demonstration of this device Figure 19 Orientation Sensor The figure shows how the sensor determines whether the device is properly oriented or not Bearing on the Switch Ball not on the Switch Device is Properly Oriented and Device is not Properly Oriented and Loading May Commence Loading is Stalled J D Figure 19 Orientation Sensor 1 2 8 Batteries Charger The components for the automated syringe loader will be powered by rechargeable batteries In adding to together the voltage needed for the various electrical components it was determined that the device would require approximately 30v of power To meet this energy need three AirSoft 10 8v rechargeable batteries will be incorporated into the device A charging module will be built into the syringe loader s case so that a detachable power cord will be able to be plugged into a standard wall outlet for charging the device s batteries Figure 20 10 8v Rechargeable Battery 1 2 9 Case Layout A plastic case will enclose the automated syringe loading device The front of the case with have a vertically positioned touch screen monitor a microphone and a speaker The bottle loader door on the top on the device and syringe loading door located in the lower right portion of the device will be secured using Velcro flaps 11 75 otf 45 6 5 Figure 21 Automated Syringe Loader Case Front View
13. e s sensors communicate with LCD Display and sound synthesizer chip operate the device s motor and servo and implement a simple menu interface for the user to interact with Design s programming was to be written using Visual Basic in Design 2 programs will be written using BASIC and Ladder Logic While the BASIC program will run sequentially similar to what would be done in Design 1 s Visual Basic program the Ladder Logic program will run using parallel processing This programming method will allow the microprocessor to gather data from sensors and control components in real time Sound input will be handled by a sound recognition chip the RSC 4128 as opposed to relying on a software package Dragon Naturally Speaking such as that used for Design 1 Although this chip will be somewhat limited in the number of words that it will be able to recognize from voice input its major advantage over Design 1 s software is that it is speaker independent it will not require any voice training in order for its pattern recognition processing to work This sound chip will also be used to synthesize speech for system prompts and other audio output The syringe platform assembly has been modified from Design 1 the syringe is now incased in a moveable drawer which will be accessible from the rear of the device The C shaped guides for holding the syringe have been replaced with grips which will maintain its position while allowing easier access
14. e Amount from User Display Dose Amount Entered Ask if Correct Get Data from Orientation Sensor Device is Vertical Prompt User to Yes Orient Device Vertically Ready to Load Syringe Ask to Confirm Load No Dose Cancelled No Yes Load Syringe Confirmed Yes Get Data from Bottle Touch Sensor Double Check Bottle Present Bottle Present Prompt for Bottle Get Data from the Syringe Rear Touch Sensor No Double Check Syringe Present Dose Cancelled Yes No Syringe Present Prompt for Syringe Dose Cancelled Yes Figure 9 Menu Flowchart Part 3 Double Check Device Vertical Get Data from Orientation Sensor Device is Vertical Operate Syringe Motor to Insert Syringe in Bottle Syringe Inserted in Bottle Calculate Distance to Move Syringe Plunger Operate Plunger Motor Plunger Distance Reached Operate Syringe Motor to Remove Syringe from the Bottle and Present it to User Prompt User to Orient Device Vertically Dose Cancelled Main Menu Figure 10 Menu Flowchart Part 4 Prompt User to Take Loaded Syringe Ask if Load Dosage was Successful Ask if Insulin was Drawn from the Bottle Store
15. e errors which will give the user false confirmation of the intended dosing These errors can become significant to a person who must have the correct amount of insulin The device should have no exposed electrical wires The patient can be harmed in the occasion that it produces an electrical shock The device must also be contained in such a way that if a spill accidentally occurred there would not be any risk to the user To assure that there is no additional hazards to the user a clear shielding made out of lightweight plastic can be used to cover the mechanical components An additional safety issue is malfunction within the mechanical components Failure in the syringe guides could lead to mis positioning or jamming of the syringe during loading In addition failure in the bottle holding assembly could lead to misalignment of the bottle which could result in syringe needle damage or breakage All have the possibility of injuring the user of the device Sterilization of all syringes is an important safety consideration Each syringe comes individually packaged for sterilization reasons so it is therefore necessary to maintain an environment in which the patient will know they are being protected from harmful conditions 4 Impact of Engineering Solutions A programmable display and an updateable audio interface approach opens up many customization options for clients with specific needs Different front panel versions and support for other
16. ected to the PC building the program by another RS322 port The CUBLOC CB405 can have up to 200 KB of programmable memory It has an operating voltage of 4 5 to 5 5 V eenmnenen eRe eOse RE RPRRRR ERRRRRRE maseeone seoses5 sseeenee apasgpgg TS rr e kai RAS 8 a x 2 me ne gt i Li p 6 gt u PEN 2ga e2r les rr a 7 p FPFSSEEL EELEESEES SESEREE A ee t ast o gt pa e WEEMUEBEEREEREECEERL a L iL ad A jatpaep S2SSoSs gt KESREREE dos at o5 eror ii A irea aay Y ara aa aa a MT Joas p Oe y wa Ox TS Sur syp f s azen F a K A Sa m aoe s Tein ioTolwreraeroy m Figure 3 CUBLOC CB405 Base Board To download the program built on a PC to the CUBLOC board an USB to RS232 converter can be used When disconnecting IntelliLCD with a PC the main program is stored on the internal flash memory of CUBLOC and can be retained without power With the CUBLOC device the program can be downloaded modified and erased an unlimited amount of times An Internet modulus XPORT converts RS232 signals into TCP or UDP packets Using the Internet XPORT can be used in sync with CUBLOC to download and monitor programs This means that the programmer can gain access to the device anywhere in the world by use of the Internet Such a feature is important for distributors of the device to provide customer support and access problems associated with it Figure 4 XPORT 1 2 2 Vo
17. emos can use either 8 bits 64 Kbps or 4 bits 32 Kbps per sample To compress the speech external parallel or serial bus Flash or SRAM is required The recorded information by the programmer of the syringe loading device will be the prompts directed at the user for insulin dosage amounts verification and any additional instructions or questions These recordings will be played for the user upon instruction from the programmed CUBLOC chip With the addition of an external microphone an audio signal is passed to the preamplifier and the analog to digital converter ADC to convert the incoming speech signal into digital data The speech features are extracted using Digital Filter engine The microcontroller then processes the speech features using speech recognition algorithms in firmware This resulting speech recognition results can be ran through the programmed CUBLOC chip for further implementation This is possible by the included three bidirectional 8 bit I O ports that allow the processor to interact with external devices 2 1 2 3 Programming The programs that will control the main functions of the syringe loading device will be written in both BASIC and Ladder Logic The Ladder Logic program will communicate with all the sensors simultaneously using a parallel processing approach 3 Data will be able to be received continuously allowing the program to acknowledge voice or touch instructions from the user in real time Real time
18. ented so the user does not come into a dilemma that may cause their health to be in jeopardy The device must therefore have rechargeable or easy replaceable batteries that allow a longer life of the device and an increase of portability The size of the device is a consideration for reasons pertaining to portability and to ensure that the user will not feel the device is a nuisance The self contained device should be as lightweight as possible since some of the users do not have great strength For active users the device should not hinder other aspects of life such as carrying young children and objects By putting the device intended to be the size of a briefcase in a bag that can be worn on the shoulder across the chest or even in a backpack fashion the user will be able to select their choice of style and what is most comfortable to them The device should be protected in the case that the device drops on the ground or is shaken around The layout of the internal casing will be designed in such a way that every component is affixed to the case and protected The layout will also be maximized so the case is not larger then it absolutely must be 3 Safety Issues Accuracy and durability of sensors is a main safety issue for the automated syringe loading device Without accurate sensors incorrect doses of insulin will most likely be drawn Such errors may result in too much insulin or not enough Air bubbles will also be a product of th
19. g will therefore have a linear relationship with the distance the plunger has moved It will simultaneously turn the potentiometer until it reads the desired resistance indicating that the calculated distance has been achieved The device will then fill the syringe an additional amount then expel this additional amount in an effort to remove any air bubbles that may have formed Figure 15 The Motor and Potentiometer Set up As the motor turns the screw the potentiometer turns with it to mark the distance traveled as a function of resistance Motor Potentiometer Point of Contact Between Gears Gear Figure 15 The Motor and Potentiometer Set up Figure 16 The Motor pulls the Plunger As the motor turns the screw the nut on the screw moves in a linear motion pulling the syringe plunger with it Empty Syringe Side View Top View Full Syringe Side View Top View Figure 16 The Motor pulls the Plunger 1 2 6 Syringe Tray and Motor The syringe tray seen in Fig 17 will be made out of lightweight aluminum with groves for the syringe and a slot for the plunger grip to slide though There are also two sensors present in the syringe tray One sensor tells the processor that a syringe is in the tray and the other tells the microprocessor that a syringe of 100 units is present If the first sensor states that a syringe is present while the seco
20. ice Recognition RSC 4128 RSC 4x Series from Sensory Inc www sensoryinc com is a speech recognition and synthesis microcontroller family The one chip design of RSC along with a battery microphone speaker and a crystal or resonator is combined to perform the necessary duties required of the design The single chip RSC 4x series is an 8 bit microcontroller The RSC 4128 model offers an increased amount 128 KB of ROM over the other model and includes an optional real time clock The chip maximizes battery live with a 2 4 3 6 V operation Its typical operating current at 3 V is 12 mA and the RSC 4128 chip has two low power modes Figure 5 RSC 4128 Processor by Sensory Inc RSC 4128 operates with FluentChip technology With this technology in occasions presenting noise great accuracy is improved In addition FluentChip technology creates the ability of speaker independent SI recognition vocabulary However speaker dependent recognition is also available SI vocabularies create a large population for potential users because it is independent of accents and certain disabilities Speaker independence also cuts down on training between manufacture and client and helps to make the device cost effective This method of recognition can recognize up to 30 words which is limited by the internal ROM size With FluentChip multiple languages can be accessed for users of the device 3 58 MHz Oscillator 32 KHz Oscillater optional
21. lowchart Main Menu No Yes Proceed to Prepare Dosage Display Last Dose Get Data from Information Bottle Touch Sensor Insulin Bottle No Loaded View Previous Prompt for Bottle Yes View Next Dose Information No Display Prior Dose Information No Dose Cancelled Yes Display Bottle Amount Remaining Ask if Correct Display Next Dose Information Yes Bottle Amount Correct Prompt for Bottle Yes Amount Store Bottle Get Bottle Amount Amount from User Display Bottle Amount Entered Get Data from the Syringe Rear Ask if Correct Touch Sensor Dose Cancelled Yes Figure 7 Menu Flowchart Part 1 Get Data from the Syringe Rear Touch Sensor Syringe Present Yes Display Last Dose Amount Ask if Correct Dose Amount Correct Yes Yes Dose gt 50 Units Get Data from the No Syringe Front Touch Sensor 100 Unit Syringe Present No Dose Amount Exceeds Syringe Capacity Re enter Yes Yes Dose gt Bottle Amount Dose Amount Exceeds Available Insulin Re enter No Figure 8 Menu Flowchart Part 2 Dose Cancelled Main Menu Prompt for Syringe Prompt for Dose Amount Dose Cancelled Main Menu No Get Dos
22. nd sensor does not confirm that a 100 unit syringe has been loaded the device assumes a 50 unit syringe has been loaded The sensors are simple switches that have a normally open characteristic The switch chosen for the design is the Omron 3635 Momentary Switch http www sciplus com category cfm subsection 14 category 143 Also Velcro straps will be added to the tray to secure the syringe during loading Figure 17 The Syringe Tray The syringe tray is shown with the plunger grip and with a syringe in place Syringe Placement Sensor Syringe Size Sensor Grooves in the Tray Help Hold the Syringe in Place During Loading Not Shown Straps to Secure Syringe Figure 17 The Syringe Tray 1 2 7 Syringe and Bottle Interaction The syringe tray motor and potentiometer will be placed into a drawer so the syringe can be moved to the insulin bottle during loading The drawer can be seen in Fig 18 The motor and potentiometer will move with the syringe and syringe tray so the wires that power them and connect them to the microprocessor will be longer To make movement possible a servo will be employed This servo will move the drawer along tracks when the device prompts it to Because the device knows the size of the syringe because of the sensors in the syringe tray it knows how far to move the drawer It will move the drawer a short distance when a 100 unit syringe has been inserted and a slightly farther distance when a
23. or Resonator Watchdor ADC Timers 3 ca DAC DAC Out Timer l Digital i P r Arm p Filters PRH annnm Fy Dif and Gain Speaker Out Control ie AEN R S C ig Infernal Rom Space Microphone Wakeup OK 128K or 256K General Purpese i Micracantraller _ AGC E CEE 4 8K SRAM Law Batilery Coamparaters Detection 4 Input Vector Accelerator with Twin OMA RASC 4x Searles General Purpose I O External Memory Interface 3 x 8 bil ports 24 l O amp bit data 20 bit Address Figure 6 Block Diagram of RSC 4128 An additional feature of RSC 4128 1s Audio Wakeup This allows the user to start the device when the chip is in power down mode By simply clapping or whistling Audio Wakeup will wakeup the device for speech or application tasks Such a feature 1s especially useful for the syringe loading device because it allows minimal battery usage for a device that can be continuously listening Speaker Verification is also a feature that is appealing because of its voice password capabilities To access the Speaker Verification feature the target user speaks the previously trained password A third available feature Word Spotting lets RSC 4128 to spot specific words surrounded by other speech within a phrase Due to user limitations being able to spot specific words among phrases is important Easy to use tools allow developers to record and compress voice recordings for playback specified by the program These voice m
24. sensor readings will also be used to ensure that the bottle amp syringe are securely in position throughout the syringe loading process and that the device remains in the correct orientation Any bottle amp syringe position problems or orientation issues will cause the loading process to pause until the condition is corrected Real time sensing will also be used in operating the motor for drawing the syringe s plunger as the plunger is drawn back the potentiometer will be continuously monitored until the calculated resistance value is reached The BASIC program for the device will handle all communication with the LCD Display and the sound chip by accessing the memory that is used by the Ladder Logic program it will be able to determine if the user is entering data and or commands via touch or voice input In addition to reading Ladder Logic memory the BASIC program will also be able to write to it allowing it to affect the processing flow of the Ladder Logic program This will allow the BASIC program to indirectly control the device s servo and motor operation The BASIC program will be used to implement a simple menu from which users can choose to view past dosage information or prepare a new dose of insulin Menu prompts data and error messages will be communicated visually using the LCD Display and audibly using the sound chip and speaker connected to it Below is a flowchart that outlines the BASIC program s major processing steps F
25. uch screen monitor The device has a variety of font sizes and styles in addition to different languages that can be changed to fit an individual s needs The device will be intergraded with a CUBLOC405 chip that uses BASIC and Ladder Logic programming languages A real time clock chip will be added to the board to provide the user with time stamped records of doses drawn The information can be accessed by connection to the computer by USB or by removing the SD card from the IntelliLCD monitor The monitor s touch screen will allow users to easily select the amount of insulin they wish to inject with additional confirmations of the amount 1 1 2 Voice Recognition The voice recognition system used in the design is RSC 4128 chip model by Sensory Inc This chip is capable of voice recognition and synthesis It can be used with either speaker independent SI or speaker dependent SD recognition modes The RSC board will have connections for a speaker and microphone 1 1 3 Programming The programming for the device will be written using both BASIC and Ladder Logic A Ladder Logic program will be used to monitor all of the sensor inputs of the device simultaneously using a parallel processing approach This program will also be used to operate the syringe loader s servo and plunger motor A BASIC program will be used for sending and receiving data from the LCD Display the memory card and the sound processing chip The BASIC program will be
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