Vehicle compass system
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United States of America Patent
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-
Jun 2, 1998
Grant Date -
N/A
app pub date -
Jan 18, 1996
filing date -
Jan 18, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A vehicle compass system having a magnetic field sensor coupled to a processing circuit which samples the sensor data and implements a calibration routine that generates compensation signals to compensate the sensor for the effects of vehicular magnetism so that accurate heading information can be displayed on a display coupled to the processing circuit. If the signal levels detected are outside of a variable threshold, then the calibration routine is run. Also provided is a circuit for receiving vehicle position information in response to which the processing circuit adjusts the signals supplied to the display in order to account for magnetic variations between the true north and magnetic north.
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