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Electronic compass and method for tracking vehicle rotation

  • US 7,225,551 B2
  • Filed: 04/07/2005
  • Issued: 06/05/2007
  • Est. Priority Date: 04/07/2004
  • Status: Expired due to Fees
First Claim
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1. A method of controlling an electronic compass assembly comprising:

  • determining compass tracking angles in a coordinate system for magnetic field data points that correspond to magnetic field sensor signals produced as a vehicle rotates relative to a surrounding magnetic field, the magnetic field data points producing an expected curve in the coordinate system;

    tracking rotation of the vehicle relative to the surrounding magnetic field based upon the compass tracking angles; and

    determining whether the vehicle has rotated a desired amount based at least partially upon the expected curve and the compass tracking angles.

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