Matt Waldersen TJ Strzelecki Rick Schuman Krishna Jhajaria (Presenting)

 The proposed project is a mobile brain-computer interface.  Tracks the eye movements and attention levels and uses it to interact with a head up display (HUD)  Consists of various components –  EOG circuit (non-commercial)  Neurosky mindwave  FPGA Module  Beagle Board  Microcontroller  Video glasses  Web camera  Rechargeable Batteries

 Manufacture  natural resources  Hazardous Chemicals  Energy  Normal Use  expected product lifetime  energy consumed when both “on” and “off  Disposal/Recycling  Proper disposal of various components

 Inclusion of Hazardous chemicals in the manufacture of -  Integrated circuits  printed circuit boards  rechargeable batteries (lead acid,NiCd)  Solution  Use a manufacturer that is RoHS compliant and RoHS compliant components.  RoHS (Restrictions of Hazardous Substances) checks for the presence of Hazardous chemicals  For Lead there must be no more than 0.1% of the material by weight.  Must have 100 ppm or less of mercury

 Expected product lifetime –  The average life of a Li-Ion battery is 300 to 500 discharge-recharge cycles, or 2 to 3 years  Other components – 5 to 8 years  Can be increased by efficient use – instructions provided in the manual  Provision for replacing batteries  Parts sold separately/used separately  Power consumption –  beagle board ~1.5 watts  Webcam ~ 2.5 – 3 Watts  Video Glasses ~ 5 watts  Support power saving mode – Turn off video glasses and webcam when idle

 Vuzix Wrap 920 AR have two 640 x 480LCD screens  If broken the backlight of the LCD can release mercury  Provide warnings in the manual  Battery hazards  Possible leak or fire if exposed to extreme heat or abuse  Make it clear to treat the battery intelligently in manual

 Disposal of Battery  Make the battery easily removable and give instructions in manual on how to find locations that recycle or properly dispose of them  Remainder of Product  Easy to disassemble parts  Give instruction on how to find a location that recycles or disposes of electronics

 Two aspects of operational safety  safety under “normal” operating conditions  safety in the event of malfunction  Hardware failures  Webcam  Video Glasses  Neurosky Mindwave  Software failures  Communication failure between devices  ANN failure  Display software failure

 EOG circuit electrodes –  Circuit had direct contact with skin through the electrodes  the device needed to contain appropriate safeguards so that any potential shock to the user does not exceed a safe level  The National Institute for Occupational Safety and Health considers to be 1mA  Using current limiting resistors to limit the current

 Testing to safeguard potential shock performed –  at various temperatures  Different skin types/individuals  In moisture (Sweat can cause moisture)  For prolonged use

 Head up displays (HUD)–  Positive misaccommodation causes objects in the visual field to appear smaller and more distant than they actually are.  This issue can be resolved by placing the glasses at the right focal point

 Issues of cognitive capacity have a greater impact on safety in HUD  May reduce detection of unexpected events  Reduce clutter  Keep display simple and intelligible

 Webcam failure / video glasses failure  Will cause blocking of view if unable to remove the device immediately  May be dangerous if outside/mobile  Could injure yourself/others

 Webcam failure / video glasses failure solutions -  Device should be easily removed when vision is blocked  Efficient packaging and design is needed

 Display software failure  Display irrelevant/misguiding information  Display images which are not live  Worst case – Not realize the failure

 Webcam failure / video glasses failure solutions -  Using human factors criteria for display – “Present information in such a way that failure or malfunction of the display itself will be immediately obvious.”

 Other software failures –  Communication failure between devices ▪ Faulty behavior  ANN failure ▪ Unable to make selection ▪ Make wrong selections  Not dangerous yet unethical to sell buggy products  Thoroughly testing the device for performance at all conditions and corner cases

 Our team will be responsible for ensuring that a product has been “adequately” and/or “reasonably” designed and tested to ensure operator safety?  Individual components will be tested separately first  EOG circuit and the head up display have safety concerns hence will be tested thoroughly.  Failure modes would be recognized and debugging instruction will be provided in the manual  In case of major failures “graceful shutdown” of the system will be ensured  Additional Measures -  placement of warning labels  providing cautions in user documentation

Questions