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Enhanced Navigational Aid For the Visually Impaired

Enhanced Navigational Aid For the Visually Impaired. Peter Okma (CPE) Abhay Sampath (EE) Katelyn Sapio (EE). 04/28/2010. Presentation Outline. Project Formulation Peter Okma Design Specifics Abhay Sampath Additional Considerations Katelyn Sapio. Problem.

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Enhanced Navigational Aid For the Visually Impaired

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  1. Enhanced Navigational Aid For the Visually Impaired Peter Okma (CPE) AbhaySampath (EE) Katelyn Sapio (EE) 04/28/2010

  2. Presentation Outline • Project Formulation Peter Okma • Design Specifics AbhaySampath • Additional Considerations Katelyn Sapio

  3. Problem • There is a need for devices to aid the visual impaired with navigation • Widely used solutions don’t take advantage of modern technologies • Seeing eye dogs, canes, etc. • The few high-tech solutions currently available are not very effective and are extremely expensive • MOWAT, Laser Cane

  4. Project Goals • Design a device that will provides useful feedback to enhance the navigational ability of the visually impaired • The device should be • Useful • Portable • Reliable • Affordable

  5. Solutions Considered

  6. Chosen Design

  7. High-Level Algorithm • Sensor reads distance • Microcontroller gets the direct distance reading, then computes the differential reading

  8. Intuitive Implementation • Amplitude proportional to distance • Pitch proportional to velocity (differential distance) • Difference between either ear is related to angle • Sensor information is delivered through the corresponding speakers

  9. Functional Flowchart

  10. System Model

  11. System Model

  12. System Model

  13. Economics • Ultrasonic Sensors $120 • Maxbotix LV-MaxSonar-EZ • Speakers $15 • Microcontroller & Board $65 • Arduino Mega2560 • Atmel ATmega2560 • Miscellaneous $50_____ • Total $250

  14. Health and Safety • Should not obstruct hearing • Software: Beeps vs. constant tone • Hardware: Shape of headgear • Safety Risks • Product meant for eye level detection • Learning Curve • Battery Life • Calibration and Accuracy

  15. Ethical Responsibilities • Reliability vs. Cost • Software: Must act with minimal delay • Hardware: Accuracy and reliability must be maximized • Marketing: Risks and limitations should be made clear • Ex: This device cannot sense elevations in floors, so it must be used with a cane or a seeing eye dog

  16. Conclusion • Improvements on existing products • Omni-directional awareness • Velocity Recognition • Comfort/Aesthetics • Intuitive audio feedback • Low Cost

  17. References • http://www.rehab.research.va.gov/jour/74/11/2/443.pdf • http://classes.engr.oregonstate.edu/eecs/spring2003/ece44x/groups/g14/white%20papers/whitepaper_matt.htm • http://www.maxbotix.com/MaxbotixHome.html • http://www.brailleinstitute.org/facts_about_sight_loss • Fast and robust tracking of multiple moving objects with a laser range finder • http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=932853&tag=1 • A comparison of line extraction algorithms using 2D laser rangefinder • http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1545234 • Laser range finder based on synchronized scanners • http://www.opticsinfobase.org/abstract.cfm?&id=27938 • Compact laser radar and three-dimensional camera • http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-23-4-800 • http://www.tsbvi.edu/seehear/fall98/waytogo.htm • http://www.noogenesis.com/eta/current.html • http://www.agis.com/Eldercare-Basics/Assisted-Daily-Living-Aids/Mobility/Blind-Mobility-Aids/default.aspx • http://en.wikipedia.org/wiki/Blindness#Adaptive_techniques_and_aids • http://trid.trb.org/view.aspx?id=810306 • http://www.onlineethics.org/Resources/ethcodes/EnglishCodes/9972.aspx • http://www.onlineethics.org/Resources/ethcodes/EnglishCodes/IEEEguidelines.aspx • http://www.acm.org/about/se-code • http://www.ilr.cornell.edu/edi/disabilitystatistics/ • http://www.worldaccessfortheblind.org/node/119 • http://en.wikipedia.org/wiki/Animal_echolocation

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