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Gyro-compass

  • US 5,375,336 A
  • Filed: 04/29/1993
  • Issued: 12/27/1994
  • Est. Priority Date: 05/08/1992
  • Status: Expired due to Term
First Claim
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1. A gyro-compass comprising:

  • an angular velocity sensor;

    angular velocity applying means for applying a known rotational angular velocity to said angular velocity sensor;

    a plurality of synchronous detection circuits for detecting an output signal of said angular velocity sensor in synchronism with different phases;

    a plurality of smoothing circuits for smoothing output signals of said plurality of synchronous detection circuits;

    a composite circuit for composing output signals of said plurality of smoothing circuits;

    a differential circuit for obtaining a difference between one output signal of said plurality of smoothing circuits and an output signal of said composite circuit; and

    a separate differential circuit for obtaining a difference between an output of said differential circuit and a signal corresponding to the known rotational angular velocity applied by said angular velocity applying means.

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