System and method for compensating for motor magnetic...

Details System and method for compensating for motor magnetic... System and method for compensating for motor magnetic...

2008-01-29

2008-01-29

Fulton, Christopher W (Department: 2859)

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

Reexamination Certificate

active

07322117

ABSTRACT:
A method for correcting a vehicle compass measurement for an interfering magnetic field generated by a vehicle accessory, where the interfering magnetic field has an intensity sufficient to cause a compass measurement error, includes monitoring the operation of the vehicle accessory and detecting a characteristic of operation of the vehicle accessory. A measurement or timing signal is then generated based on the characteristic of operation. A magnetic field for direction is measured in response to the measurement signal and an offset or correction value is determined based at least one the measured magnetic field and the characteristic of operation of the vehicle accessory.

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