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Oscillatory angular speed detecting apparatus

  • US 5,197,331 A
  • Filed: 03/13/1992
  • Issued: 03/30/1993
  • Est. Priority Date: 12/30/1987
  • Status: Expired due to Fees
First Claim
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1. An oscillatory angular velocity detecting apparatus, comprising:

  • a pillar-shaped oscillator body;

    means for applying a drive signal to a transducer mounted to a first side surface of the oscillator body, said transducer comprising means for applying a driving force to said oscillator body;

    means, mounted to a second side surface substantially perpendicular to the first side surface of the oscillator body, i) for producing a first readout signal when no rotational force is added to the oscillator body and ii) for producing a second readout signal when a rotational force is added to the oscillator body;

    phase detecting means, i) for a first comparison of the respective first and second readout signals with the drive signal to obtain first and second compared readout signals, and ii) for a second comparison between the respective phases of the first and second compared readout signals to obtain a first DC angular signal having a voltage level;

    means for conducting amplitude detection by comparison between amplitudes of the first readout signal and the second readout signal to obtain a second DC angular signal having a voltage level; and

    means for deriving a strength value and a direction value, respectively, of angular velocity from the voltage level of the first DC angular signal.

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