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Single ended tuning fork internal sensor and method

  • US 5,408,876 A
  • Filed: 11/15/1993
  • Issued: 04/25/1995
  • Est. Priority Date: 03/12/1991
  • Status: Expired due to Term
First Claim
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1. In a method for sensing rate by the use of a single ended tuning fork mounted in a housing and having first and second tines lying in a plane and having an axis of symmetry and a body formed integral with the first and second tines and having drive electrodes and pickup electrodes mounted on the tines, the method comprising supplying an oscillator frequency to the drive electrodes to drive them in a drive mode and sensing an angular rate signal provided by the pickup electrodes in response to rotation about said axis of symmetry, the improvement comprising forming each of the first and second tines so that they are rectangular in cross section and having a width which is different from the thickness to separate by a delta f frequency the pickup mode from the drive mode and forming a stem in the body which has width and length that causes reduction in the delta f frequency.

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