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EcoCAT: Automotive Touch Screen System for Displaying Vehicle Data

This dash-mounted touch screen computer, EcoCAT, serves as the Automotive Human-Machine Interface (AHMI) for real-time display of vehicle information. The system aims to consolidate various data points, including fuel efficiency, emissions composition, historical data, and more. Priced competitively below $1,200, EcoCAT features a 7" touch screen running on a Windows XP platform with LabVIEW GUI. It communicates with the CAN controller via a CAN hub, ensuring efficient data parsing and reading. The system is designed for safe operation in high-temperature environments without a fan and supports seamless power on/off handling triggered by vehicle signals. Future work includes HIL testing, EcoCAR integration, and vehicle installation discussions.

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EcoCAT: Automotive Touch Screen System for Displaying Vehicle Data

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  1. Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer March 09, 2010 • Assim Addous • Sam Coogan • Santiago Hässig • Martin Perry

  2. Dash-mounted Touch Screen

  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 • Real-time data • Fuel efficiency • Motor & engine operating points • Emissions composition • Historical data • Projected mileage on current drive cycle • Fuel saved • Diagnostic data • Low fuel • Engine overheating

  5. GUI Content • 7” touch screen • Windows XP platform • LabVIEW 8.6 GUI

  6. Current Status • Touch screen enabled computer that communicates with the CAN controller • CAN hub has been assembled • Rudimentary GUI developed on LabVIEW

  7. EcoCAT System Overview HMI Computer parses USB data CAN Controller reads in signals from HUB

  8. EcoCAR’s CAN-bus Topology

  9. Temperature Control • Vehicle interior can reach temperatures of up to 120°F • The HMI Computer operates safely without a fan in environments under 95°F

  10. Power On/Off Handling • Power off • Computer shutdown sequence triggered by vehicle signal indicating ignition off state • Initiate proper shutdown of operating system • Turn off power to the computer and monitor • Power on • Startup triggered by key position • Initiate operating system and LabVIEW

  11. Monday Tuesday Wednesday Thursday Friday Saturday Sunday 9 19 Establish CAN comm. 31 GUI 1.0 Projected Schedule & Future Work March

  12. Monday Tuesday Wednesday Thursday Friday Saturday Sunday 6 HIL Testing GUI 2.0 13 EcoCAR testing 29 Demonstrate Car ships Projected Schedule & Future Work April 10 Vehicle installation

  13. Discussion & Questions • Power on/off handling • Handled by external hardware • Software-on-computer • Temperature control • GUI content

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