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Accelerometer augmented precision compass

  • US 6,785,975 B1
  • Filed: 08/05/2003
  • Issued: 09/07/2004
  • Est. Priority Date: 08/05/2003
  • Status: Expired due to Fees
First Claim
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1. A compass system comprising:

  • a platform defining an x-axis, a y-axis and an xy-plane, wherein a z-axis is orthogonal to said xy-plane;

    a beam rotatably coupled to said platform such that said beam rotates about said y-axis;

    an accelerometer comprising a flexure plate perpendicular to said y-axis, said accelerometer coupled to said beam a distance from said y-axis, said accelerometer generating an accelerometer signal in response to movement of said flexure plate;

    an angular position sensor sensing angular position of said beam relative to said x-axis and said y-axis within said xy-plane, said angular position sensor generating an angular position signal therefrom; and

    a processor receiving said accelerometer signal and said angular position signal, said processor generating an East-West signal therefrom.

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