Azadeh Farzin - School of Engineering Science
Contents
1. 2 Physical Requirements The following list of physical requirements was derived after considering the operating environment for Auto Wake In general AutoWake will be employed in the vicinity of a human eye while traveling at reasonably high velocities As a result we conclude that Auto Wake must be lightweight small and should not have a sharp or jagged geometry PR 1 Light plastic eyeglass frame with wide range of view sight PRI2 Small IR emitters and IR receivers to prevent view blocking PR 3 P Thin light flexible circuit and wires for wiring the sensors out of the eyeglass frame to minimize any obstruction to the users field of view PR 4 Flexible wires for reliable connection between the frame and the control board PR 5 Small control board box not larger than the size of a text book compatible with the design of dashboard or seat of the car PR 6 Self dedicated power cord to connect to the cigarette lighter of the car PRI7 pl Extra space near the control board for an alternate power unit PR 8 P PR 9 P PR 10 2 3 2 3 1 SR 1 f SR 2 SR 3 P SR 4 SR 5 2 3 2 SR 6 P SR 7 P SR 8 P SR 9 P SR 10 SecuriTeam Co Safe mounting place for the control box as well as safe design of the frame in case of an accident to prevent damage to the passengers and the eyes respectively Proper location for driver s status indicator LEDs to be2. the user to start stop the device at will The status LEDs shall be placed at a proper position that can be viewed by all the passengers The color and luminance of status LEDs shall be recognizable during the day and night in different weather conditions The frame shall be reached easily by the driver Regulatory Requirements Horns shall be used to alert others of a danger and shall be used wisely 3 Documentation and Training The manual for this product shall contain user instructions The manual shall contain basic information of functionality The manual shall contain customer service contacts for repair concerns and any encountered difficulties The manual shall contain basic troubleshooting instructions The manual shall provide a FAQ section The device shall be calibrated and adjusted for users of the first stage prototype l Section 2 System Overview provides some answers to FAQ SecuriTeam Co 7 Final Notes The user shall refer to the user manual for more elaborate instruction on using the device The user can also refer to our website at www autowake com for contact info and downloadable version of the user manual and functional specification documents
3. used by other passengers Optimized positioning of IR sensors to minimize blocked view sight and distraction System Requirements General The system s operation shall be stable independent of the brightness of the environment The system s operation shall be stable independent of varying temperature environment This system s operation shall be stable in reasonably normal humidity and pressure conditions The control box cooler system shall keep the temperature of the CPU under 40 degrees The operation of the system shall not be affected by convection currents inside the cabin Performance Eye blinks shall be distinguished from sleepy eyes The alert systems shall stop automatically 2 seconds after the recovery from the sleep state The buzzer activation time shall be less than 2 sec from the time that eyes become closed Undesirable conditions shall be signaled via status indicator LED s The secondary alert system horning 2 shall start after 10 seconds from the activation of the primary alert system 2 3 3 SR 11 2 3 4 SR 12 SR 13 2 3 5 SR 14 2 3 6 SR 15 SR 16 SR 17 f SR 18 Zor SR 19 2 4 CR 1 CR 2 P SecuriTeam Co Sensitivity The device shall be sensitive enough to detect partially closed eyes Buzzer The loudness of the buzzer should be greater than 65 dB The upper limit is still to be determined We est
4. SecuriTeam Co School of Engineering Science Simon Fraser University Burnaby BC V6A 1S6 Dr Andrew Rawicz School of Engineering Science Simon Fraser University Burnaby BC V5A 1S6 RE ENSC 340 Functional Specification for AutoWake Sleep Detector Dear Dr Rawicz Attached you will find the technical specifications for AutoWake Sleep Detector The design of Auto Wake is meant for alerting drowsy drivers who are at the brink of falling asleep at the wheel This device is composed of an eyeglass frame and a main control board for user interface purposes 1 The control board allows the user to activate the device when the frame is properly installed in front of the eyes For convenience of use adjustments are made by sales people to ensure appropriate positioning of the frame with respect to the eyes while in use The attached functional specification provides target specifications for the complete design and assembly of the first stage prototype We estimate that we will reach this stage by December 2002 SecuriTeam members are Nima Boostani Azadeh Farzin Ali Keyvani and Nasim Morawej If you have any further inquiries please do not hesitate to contact our Chief Excecutive Officer Azadeh Farzin She can be reached at afarzin Q sfu ca Sincerely A zadeh F arzin Azadeh Farzin SecuriTeam Co SecuriTeam Co Functional Specification for AutoWake Sleep Detector SecuriTeam Co School of Engineering Scien
5. all However if the two signals are significantly different then the CPU interprets this to mean that the eyelid is not obscuring the light reflected from the eyeball as shown in figure 2 1 b The CPU continually checks the status of the eye It is not necessary to monitor both eyes as very few people sleep with exactly one eye open and one eye closed The CPU is capable of distinguishing between simple eye blinks and the onset of sleep IR light IR light emitter 1 emitter 1 IR light emitter 2 IR light emitter 2 a b Figure 2 1 1 a Different IR light reflections from the eyeball and the eyelid when eyes open b Identical IR light reflections when eyes closed Upon detecting the onset of sleep the CPU alarms the driver by activating a buzzer The alarm ceases when the driver re opens her his eyes However the CPU continues the primary alarm and activates a secondary alarm mechanism if the driver fails to wake up This secondary alarm will be the activation of a flashing lamp in the SecuriTeam Co first stage prototype and the activation of the horn of the car in the production prototype Reference IR receiver Secondary Alarm Monitoring IR receiver Check Sensors again Figure 2 1 2 Block diagram of the design of AutoWake system If the user wishes to stop start using the device at any time a stop start button is available on the control board in the design of the first stage prototype 2
6. at via VA screws or installed in a dashboard compartment CR 8 The control buttons shall be wired to the left side of the driver s seat and mounted at driver s hand level CR 9 The frame case and the cord winder shall be mounted on the right side of the driver s seat 3 Reliability and Serviceability The AutoWake operating system and control board shall be designed to ensure the most reliable operation possible However due to different shapes of human eye and eyelid that the system has to monitor different reactions from the system may be obtained The following requirements shall be met to expect a reliable functioning of the device RSR 1 In case of failure the unit must recover by cycling the power RSR 2 The Start Stop button must have a duty cycle of at least 1 000 000 RSR 3 The unit shall be installed by trained technicians RSRI4 The unit shall be serviced by the technicians and not the user RSR 5 The unit must operate continuously for 2 days without failure RSR 6 The unit must be able to reliably monitor young middle aged and old eyes 4 SecuriTeam Co User Interface The following requirements should be met in order to ensure that Auto Wake is user friendly UIR 1 UIR 2 UIR 3 UIR 4 P 5 RR 1 6 DR 1 P DR 2 DR 3 P DR 4 P DR 5 P DR 6 f The Start Stop button mounted on the left side of the driver s seat enables
7. ce 8888 University Drive Simon Fraser University Burnaby B C Canada V5A 1S6 778 881 2943 Project Team Nima Boostani Azadeh Farzin Nasim Morawej Ali Keyvani Contact Person Azadeh Farzin afarzin sfu ca Submitted to Dr Andrew Rawicz ENSC 340 Steve Whitmore ENSC 305 School of Engineering Science Simon Fraser University Issued date October 14 2002 Revision 1 1 SecuriTeam Co Executive Summary Statistics show a significant correlation between tiredness and car accidents and thus sleepy drivers behind the wheel are indirectly a dominant cause of death in North America second only to heart disease and cancer 2 Auto Wake automatically buzzes up sleepy drivers thus saving many lives Auto Wake s main purpose is to ensure safe driving conditions for drivers This device has the following features Friendly and non invasive eye closure detection method Easy to use Easy to mount supplementary devices Reasonable cost ad val i SecuriTeam Co Table of Contents EXECUTIVE SUMMAR N AN EE EE EE EE EO EG N Il 1 TIN FRODU C HON siese sedes des Ge sed se ede ee oe si ee ee ee ee oe N Ge ee 1 tl Sane rr ee ee 1 1 2 AR NINE 2 1 3 REFERENCES ses ees sees es Ge eo ee se Ge ee Ge se Ge Ge Ge ee ee ee ee ee es ie ee 2 1 4 INTENDED AUDIENCE erevovnovevnernvnenennenennenennrnennrnenennensnnenennnnennnnensnnenennenennnnenennensnnenee 2 Lo CONVENON ea TR 2 Z SYSTEM REQUIREMENTS sc
8. d how good of a bed your car seat would be If so AutoWake will set you straight AutoWake detects when a driver is on the verge of falling asleep Since in this state the driver is losing control of the car Auto Wake responds by alarming the driver This alarm is Auto Wake s primary alarm mechanism If the primary mechanism is unsuccessful Auto Wake invokes a secondary mechanism to alert the surrounding drivers and pedestrians How beneficial Auto Wake is really Have a look at the scene in figure 1 1 Figure 1 1 How else would they know The first stage prototype will be completed by December 2002 Details of mass production of Auto Wake are left for future investigations 1 1 Scope This document provides the functional details for the first stage prototype of AutoWake Some discussions regarding a production prototype are interspersed throughout the document SecuriTeam Co 1 2 Acronyms FAQ Frequently Asked Questions IR Infrared CPU Central Processing Unit LED Light Emitting Diode VDC Volt Direct Current dB Decibels AH Amp Hour 1 3 References 1 Proposal for AutoWake SecuriTeam Co 2 Rothsein Catalog On Disaster Recovery http www disastercenter com cdc 3 YOU AND YOUR VEHICLE ICBC DOCUMENT http www icbc com Licensing rsd ch02 pdf 1 4 Intended Audience Design engineers can use this document to gain more insight of the functionality of Auto Wake Project manager can use this document for in
9. formation on project design and objectives Sales manager can use this document to obtain primary marketing information Users can use this document to gain a general idea of how to use the device 1 5 Conventions Requirements start with the annotation of aR where denotes the logical order of each step and a is any of the following P Physical Requirement S System Requirement C Connection Requirement RS Reliability and Serviceability UI User Interface Requirements R Regulatory Requirement DR Documentation and Training SecuriTeam Co Functional requirements for first stage and production prototypes first stage prototype only and production prototype only are followed by p f and p suffixes respectively 2 System Requirements 2 1 System Overview The information contained in this section describes the overall expected function of AutoWake An eyeglass frame is set up in front of the driver s eye As shown in Figure 2 1 a in normal driving conditions where the eyes of the driver are fully open one of the two IR emitters casts IR light at the eyelid and the other sensor casts IR light at the eyeball Two IR receivers detect the light that is reflected from the eyelid and eyeball respectively The reflection from the eyeball is weaker than that of the eyelid A CPU compares the signals from the two receivers If the two signals are similar then the CPU interprets this to mean that the eyelid has closed over the eyeb
10. imate an upper limit of 85 dB The operating voltage of the buzzer shall not exceed 12 VDC Alternate Supply The alternate power supply shall be 12 VDC 7 AH for reliable continuous operation of 1000 hr IR Emitter and IR Receiver The radiant intensity of the IR emitters shall not exceed 10 mW sr The current through the IR emitters shall not exceed 10 mA to prevent damage to the retina The IR emitters and IR receivers shall be 3mm IR LEDs to minimize view obstruction IR receivers and IR emitters shall be positioned in black tubes to reduce the effect of ambient light Frame Wire Winding An automatic cord winder shall wind the frame connection wire when the frame 1s not in use Connection and Setup Requirements The IR emitters and receivers shall be connected to a flexible circuit which is on the frame The flexible circuit shall be connected to the control board via a stranded wire SecuriTeam Co CR 3 The control board shall be connected to the cigarette lighter of the car via standard 6 3A cord CR 4 Flexible circuit IR emitters and IR receivers shall be connected to the plastic frame permanently after adjusting using super glue CR 5 Stranded wire from the frame shall be connected to the control board via a 4 pin PC header connector CR 6 alternate supply shall be connected to the control board via a 2 pin PC header connector CR 7 The control board shall be mounted under the driver s se
11. ssssasicsscocsassecervavcceeoacvecsussabesececvesssaevsavsvdeucanstuessivsesousees 3 2 1 SYSTEM OVERVIEW io sesse ie ie oues oe od Se oe eu ee de de oe sie oe oe Ge ee ee de Da 3 2 2 PHYSICAL REQUIREMENTS eie ee dee see ees see see ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 4 2 3 SYSTEM REQUIREMENTS esoovnevnvvnnvnnvnnvnnvnnennvnnvnnennennennennennennennennennennennennennennennennenee 5 ERNS JE 5 LAG SE Ee REE EEE gt 2 NN 6 ET EE EE N Ee 6 2 NNN 6 2 3 6 IR Emitter and IR Receiver EE SS ee ee ee ee ee ee ee ee eed 6 2 TEN NN 6 2 4 CONNECTION AND SETUP REQUIREMENTS iese dee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 6 3 RELIABILITY AND SERVICEABILIT Y cececccccccccccccccccccccecs 7 4 BSH SE D DUET VEE N OE EO ON 8 5 REGULATORY REQUIREMENTS soos sissies seed see Ges seges oes ie dee NG ee eg vei ede 8 6 DOCUMENTATION AND TRAINING eeesessevevsevsevevneenevnvneenerneneenernenneneenenneneeneee 8 7 MENN 9 SecuriTeam Co Table of Figures FIGURE 1 1 HOW ELSE WOULD THEY KNOW ees ese ees sees se ee sees ee ee ee ee ee se ee ee ee ee ee ee ee ee ee ee l FIGURE 2 1 1 A DIFFERENT IR LIGHT REFLECTIONS FROM THE EYEBALL AND THE EYELID WHEN EYES OPEN B IDENTICAL IR LIGHT REFLECTIONS WHEN EYES CLOSED 3 FIGURE 2 1 2 BLOCK DIAGRAM OF THE DESIGN OFA UTOWAKE SYSTEM ese ees ees see ees see 4 SecuriTeam Co 1 Introduction Have you ever wondere
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