| 摘要 |
PROBLEM TO BE SOLVED: To correct a vehicle compass measurement for an interfering magnetic field generated by a vehicle accessory. SOLUTION: 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 on at least one of the measured magnetic field and the characteristic of operation of the vehicle accessory. COPYRIGHT: (C)2009,JPO&INPIT
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