Electronic digital speedometer for a multi-measurand data communication system
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United States of America Patent
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Oct 18, 1988
Grant Date -
N/A
app pub date -
May 27, 1987
filing date -
May 27, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A firmware/hardware electronic digital speedometer connected to a vehicle multi-measurand data communications system maintains virtually no flicker in the display of digital numbers in a digital display unit such as a vacuum fluorescent display during movement of a vehicle when no change in speed is apparent. A speed sensor supplies speed information to a first computing unit which establishes an accumulated count of speed during a first interval. Then the first computing unit supplies over a communications link the speed count to a second computing unit at a rate that approximates the update rate of the display unit. The second computing unit processes the speed data in a particular manner to effect the virtually flicker-free updating of the display and improved accuracy.
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