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Angular velocity sensor

  • US 6,705,151 B2
  • Filed: 03/20/2001
  • Issued: 03/16/2004
  • Est. Priority Date: 05/30/1995
  • Status: Expired due to Term
First Claim
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1. An angular velocity sensor comprising:

  • a sensor including a vibrator and a detector for detecting an angular velocity;

    a drive unit including a driver circuit and a monitor circuit, wherein said driver circuit supplies a driving signal to the vibrator part of said sensor, and said monitor circuit receives a monitor signal from said sensor;

    detection unit including an amplifier unit and a synchronous demodulator, wherein said amplifier unit receives outputs from the detector of said sensor and wherein said synchronous demodulator sample-holds an output from said amplifier unit in synchronous with the driving signal or the monitor signal from said drive unit and outputs an angular velocity signal; and

    self diagnosis unit which provides a diagnosis signal to detect an abnormality of at least one of said sensor, said detection unit and said drive unit by providing a displacement signal synchronized with said driving signal or said monitor signal to said detection unit.

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