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Automotive Applications of Display Systems and Human-Machine Interfaces using a

Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010. Assim Addous Sam Coogan Santiago Hässig Martin Perry. Dash-Mounted Automotive HMI. EcoCAT Overview.

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Automotive Applications of Display Systems and Human-Machine Interfaces using a

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  1. Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 • Assim Addous • Sam Coogan • Santiago Hässig • Martin Perry

  2. Dash-Mounted Automotive HMI

  3. EcoCAT Overview • Automotive Human-Machine Interface (AHMI) to display vehicle information to driver • Modern vehicles contain wealth of disparate data • OEMs and car enthusiasts seek a consolidating interface • Must be below $1,200 to be competitively priced as vehicle upgrade package

  4. Design Objectives

  5. Vehicle Panel

  6. Engine Panel

  7. 2-Mode Panel

  8. Electric Panel

  9. GPS Panel

  10. Video Demonstration

  11. Packaging

  12. Hardware Overview HMI Computer parses USB data CAN Controller reads in signals from HUB

  13. Hardware Selection • Custom Built CAN Hub • 6 DB-9 ports • Vehicle cockpit • Cargo area • NI USB CAN Controller • 1 DB-9 Port • Highspeed CAN • 500 kBaud • Lenovo Desktop • Windows XP Home • x86 Architecture • LabVIEW compatible • 6 USB ports • Xenarc 705TS • 7.5” display • 4-wire, USB touch interface • High viewing angle • Antiglare • 800x480 resolution

  14. CAN-bus Topology

  15. Software Development • LabVIEW Designed • Uses Virtual Instruments (VI) library for CAN messages • Frame to channel conversion library • Easy to add new signals • Compiled to standalone executable • Executable run as OS shell

  16. Acceptance Testing • Packaged within dash of vehicle • Demoed in vehicle using previously-obtained data • Signals replayed by vehicle controller • Data from vehicle run in December • Transparent to AHMI • Displayed data values compared to known values to ensure accurate display

  17. Power Handling • Power on • Power applied when ignition moves to accessory • Computer BIOS adjusted to boot when power is applied • Executable runs on OS startup • Power off • Soft power off switch on display • Handled by driver before car shutdown • Not ideal, but simple and intuitive • Power integrity • Will not experience power or voltage spikes

  18. Computer Power • Computer board uses 19V • Voltage detection on computer prevents lower voltage • Uses DC-AC inverter and original AC-DC adapter to power PC

  19. Prototype Cost

  20. Prototype Labor We assume an engineer making $40 per hour, with a 3x multiplier to cover benefits, overhead, etc., resulting in $120 per hour.

  21. Costs for 10,000 Units

  22. Future Work • Power off initiated by vehicle power off • Requires custom power circuitry • Embedded operating system • More lightweight for minimal hardware • Quicker boot and shutdown • Cheaper licensing and manufacturing for large scale implementation • Map database • Direct DC power to computer

  23. Temperature Control • Vehicle interior can reach temperatures of up to 120°F • Have not observed any negative effects • If implement large scale, hardware would likely not cause issue • As a prototype, difficult to mitigate

  24. Technical Specifications

  25. Technical Specifications

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