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Vibrator, vibratory gyroscope, and vibration adjusting method

  • US 5,998,911 A
  • Filed: 11/17/1997
  • Issued: 12/07/1999
  • Est. Priority Date: 11/26/1996
  • Status: Expired due to Term
First Claim
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1. A vibratory gyroscope for detecting a turning angular rate about an axis of rotation, said vibratory gyroscope comprising:

  • a vibrator comprising (i) a fixing part arranged in a plane substantially perpendicular to said axis of rotation, (ii) a base part arranged in said plane and having a first end attached to said fixing part and a second end opposed thereto in the longitudinal direction of said base part, and (iii) at least one substantially straight bending vibration piece arranged in said plane and having a first end attached to a portion of said base part other than said first end of said base part, and a second end distal from said first end in a longitudinal direction of said bending vibration piece, the longitudinal direction of said bending vibration piece intersecting the longitudinal direction of said base part, wherein said bending vibration piece terminates at said second end thereof;

    excitation means for exciting vibration of one of said base part and said bending vibration piece in said plane; and

    detecting means for detecting bending vibration of said vibrator generated by Coriolis force within said vibrator as a result of said vibrator being rotated around said axis of rotation;

    wherein one of said excitation means and said detecting means is positioned on said bending vibration piece.

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