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Electronic compass system

  • US 7,149,627 B2
  • Filed: 02/23/2004
  • Issued: 12/12/2006
  • Est. Priority Date: 03/01/2002
  • Status: Active Grant
First Claim
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1. An electronic compass system for a vehicle, comprising:

  • a magnetic sensor circuit for sensing three components of the Earth'"'"'s magnetic field vector, and for generating output signals representing the three sensed components;

    a pitch and roll sensing circuit for measuring the pitch and roll of the magnetic sensor circuit; and

    a processing circuit coupled to said magnetic sensor circuit and said pitch and roll sensing circuit for receiving the output signals, compensating the sensed components for the measured pitch and roll, computing a heading of the vehicle as a function of at least two of the compensated sensed components, and generating a heading signal representing the computed heading.

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