Compensation system for electronic compass

  • US 5,632,092 A
  • Filed: 06/01/1995
  • Issued: 05/27/1997
  • Est. Priority Date: 12/20/1991
  • Status: Expired due to Fees
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First Claim
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1. In combination, for use in a vehicle,an electronic compass comprising first and second magnetoresistive sensors oriented in a predetermined angular relation with each other and in a predetermined angular relation with respective axes of the vehicle, the first and second sensors each having an adjustable offset magnetic field generator for generating an offset magnetic field and being responsive to said offset magnetic field and to an external magnetic field for developing first and second electronic signals, respectively, representative of the combination of said magnetic fields, said external magnetic field being a combination of the earth magnetic field and a deviating field of the vehicle,an electronic circuit coupled with said sensors for developing signals indicative of the direction of said vehicle,an electronic display coupled with said circuit for displaying said direction,said electronic display being disposed for viewing by a driver of said vehicle.

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