Compensation system for electronic compass

  • US 5,802,727 A
  • Filed: 03/24/1997
  • Issued: 09/08/1998
  • Est. Priority Date: 12/20/1991
  • Status: Expired due to Fees
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First Claim
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1. An electronic compass suitable for use in a vehicle,said electronic compass comprising first and second sensors responsive to an external magnetic field for developing first and second electronic sensor signals respectively representative of said external magnetic field, said external magnetic field being a combination of the earth magnetic field and a deviating field of the vehicle;

  • said first and second sensors being oriented in a predetermined angular relation with each other and being aligned in a predetermined angular relation with respective axes of said vehicle;

    an electronic circuit for measuring said sensor signals for developing signals indicative of the direction of said vehicle; and

    a digital lag filter operating on said sensor signals to reduce the noise in said sensor signals.

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