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S3 Technologies Presents

S3 Technologies Presents. S3 Technologies: Shaun Marlatt Sam Zahed Sina Afrooze ENSC 340 Presentation: December 17, 2004. Tactile Vision Glove for The Blind. Overview. Meet The Team Introduce Product Purpose and Market Marketability Technical Aspects Wrap Up. Meet The Team.

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S3 Technologies Presents

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  1. S3 Technologies Presents S3 Technologies:Shaun MarlattSam ZahedSina AfroozeENSC 340 Presentation: December 17, 2004 Tactile Vision Glove for The Blind

  2. Overview • Meet The Team • Introduce Product • Purpose and Market • Marketability • Technical Aspects • Wrap Up

  3. Meet The Team • S3 Technologies • Group Leader and CEO • Shaun Marlatt • CFO • Sam Zahed • COO • Sina Afrooze

  4. Purpose and Market • Problem • Blind People need a device to help them ‘see’ • Market • 104,187 Visually impaired, blind and deafblind persons in Canada. (CNIB Statistic, 2002) • Current Solutions • Walking Sticks • Seeing Eye Dogs • Laser Equipped Walking Sticks ($3000 US) • Electronic Eye (under development, risk of infection)

  5. The S3 Solution • Tactile Vision Glove • Idea – Converts vision into a sense of touch • Simple, low-cost • Goal – to use off the shelf components • Software solution – minimize part count/cost • Easy to use • Simple interface

  6. Features • Multiple Sensors and Actuators • Allows edge detection and direction of motion • 4 Operation Modes - 2 Power Modes, 2 Vibration Modes • Low Power, Normal Power, Absolute Distance, Differential Distance • User Controlled Gain adjustment • From 0 to 200%

  7. Features • Audio Feedback • 1 Beep = Absolute/Differential Mode Toggle • 2 Beeps = Normal/Power Save Mode Toggle • 3 Beeps = Normal/50% Vibration Mode Toggle

  8. Operation Modes • Absolute Intensity Mode • Maximum vibration for about 15cm and no vibration for greater than 150cm. • Can detect the shape of the object • Reduced Intensity Mode • Maximum vibration intensity goes to half • Used When in low power mode • Can be set/reset by the user

  9. Operation Modes Cont… • Differential Mode • Time average of distance measured by sensors • No vibration feedback if distance not changed • With placement of new object, intensity goes high and down back to zero • Reduced power mode • Default in case of low battery supply • Mode change to diff/low intensity mode

  10. Marketability • Market Potential • Blind people need something accurate, cheap and easy to use • No such a device available in market • Production cost • Inexpensive off-the-shelf components • Prototype parts cost: $150 • Suggested Retail Price • Initial market price < $300 • Even cheaper when mass produced

  11. Operation Concept Sensors Controller Actuators Object Reflects infrared Distance Measuring Sensors Tactile Feedback to User Micro Controller Vibrating Motors User Interface System Overview Sensors measure distance PIC calculates the vibration intensity Motors output the calculated intensity User controls the operation mode

  12. Sensors • Only one sensor on at a time to reduce power consumption and avoid crosstalk • Each sensor on for 50ms • Required for device stabilization • Longest time obligation in system • Results in sampling rate of 50ms • Max output 2.85Volts at 15Cm • Connected to three AD channels

  13. Microcontroller • Samples sensor’s readings through AD • Manipulates data in “Control Signal Path” • Outputs the calculated duty cycle as a PWM signal to motor drivers. • Adjusts for any control buttons pushed by the user

  14. 8 8 8 10 8 8 8 Microcontroller Signal Path Diagram Sensor Signal Conversion (AD -> PWM Duty) AD Downsample A/D Mode Select User Gain Setting 0 0 PWM Duty Gain Upsample MUX DEMUX 12 1 1 8 PWM Override 2xABS 8 FIR HP Filter Deadband Generator Sign Bit

  15. Actuators • Each motor on, when its corresponding sensor detects an object • Max vibration intensity depends on mode of operation • Max vibration intensity can be set by user

  16. Budget Comparison • Proposed Budget • $190 • Actual Cost • $205 (8% More than predicted) • Funding (ESSEF) • $300 • Profit  • $95

  17. Task Research Complete Preliminary Design Complete Initial Prototype Built Testing and Debugging Demo Proposed Actual Oct 10 Oct 17 Oct 20 Oct 31 Oct 30 Nov 30 Nov 20 Dec 8 Dec 1 Dec 17 Timeline Comparison

  18. Future Developments • Package the device and design an actual glove • Improve the resolution for better mapping between distance and tactile feeling • Create user manual

  19. Lessons Learned • Behind a successful product is a smart idea developed by extensive research • Divide the project into tasks that can be completed by each group member • Plan ahead to achieve good timing

  20. Lessons Learned • To design efficiently, search for and think of “the best solution”. • The simpler solution is better. (Less time to implement, less chance for error, less expensive). • Always order extra parts • Use a modular design approach for assembly code. • Don’t be afraid of mistakes, try to learn from them

  21. Conclusion • It is a smart idea • It is a well designed product • We got it working

  22. Demonstrations • Operation modes demonstration • Normal and Low Power Modes • Absolute Distance Mode • Differential Mode • Gain Control

  23. Demonstrations • Performance Demonstration • Intensity Versus Distance • Differential Mode (-ve and +ve distance change representation) • Edge Detection

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