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Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch...
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![Page 1: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/1.jpg)
Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer
April 29, 2010
Assim AddousSam CooganSantiago HässigMartin Perry
![Page 2: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/2.jpg)
Dash-Mounted Automotive HMI
![Page 3: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/3.jpg)
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
![Page 4: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/4.jpg)
Design Objectives
![Page 5: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/5.jpg)
Vehicle Panel
![Page 6: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/6.jpg)
Engine Panel
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2-Mode Panel
![Page 8: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/8.jpg)
Electric Panel
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GPS Panel
![Page 10: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/10.jpg)
Video Demonstration
![Page 11: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/11.jpg)
Packaging
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Hardware Overview
CAN Controller reads in signals from HUB
HMI Computer parses USB data
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Hardware SelectionCustom Built CAN Hub•6 DB-9 ports•Vehicle cockpit•Cargo area
NI USB CAN Controller•1 DB-9 Port•Highspeed CAN•500 kBaudLenovo 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
![Page 14: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/14.jpg)
CAN-bus Topology
![Page 15: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/15.jpg)
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
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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
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• 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
Power Handling
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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
![Page 19: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/19.jpg)
Prototype Cost
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Prototype Labor
We assume an engineer making $40 per hour, with a 3x multiplier to cover benefits, overhead, etc., resulting in $120 per hour.
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Costs for 10,000 Units
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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
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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
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Technical SpecificationsComponent/Topic Specification ActualTouch screenScreen Size 7” – 8” 7.5”Touch control interface USB USB
Display interface VGA VGAPower 12V 12V (native)HMI ComputerMaximum Size 20cm x 12cm x
16.5cmMet
Power 12V 12V (through inverter)Operating system Windows XP
EmbeddedWindows XP Home
USB Interface At least 3 USB 2.0 ports
4 USB 2.0 ports
![Page 25: Automotive Applications of Display Systems and Human-Machine Interfaces using a Dash-Mounted Touch Screen Computer April 29, 2010 Assim Addous Sam Coogan.](https://reader036.fdocuments.in/reader036/viewer/2022062716/56649dbc5503460f94aaef77/html5/thumbnails/25.jpg)
Technical SpecificationsComponent/Topic Specification ActualCAN ControllerComputer interface USB USBCAN Technology 2-wire, high-speed CAN High-speed or low-speed
CAN Interface DB-9 DB-9Software InterfaceSoftware platform LabVIEW 8.6 LabVIEW 8.6CAN InterfaceWiring No smaller than 20 AWG,
stranded wire 16 AWG, stranded wire
Connector DB-9 DB-9Wiring configuration One pair of twisted-pair
wiring for CAN high and low signaling, one wire for ground
One pair of twisted-pair wiring for CAN high and low signaling, one wire for ground