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Pendulous Accelerometer with electrostatic rebalancing

  • US 5,054,320 A
  • Filed: 03/28/1990
  • Issued: 10/08/1991
  • Est. Priority Date: 06/30/1987
  • Status: Expired due to Fees
First Claim
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1. Rebalance electrostatic accelerometer, comprising:

  • a flat pendulum, having a center of gravity,a base member including means for supporting the pendulum for oscillation of limited amplitude about a rotation axis located in the plane of the pendulum and whose distance to the center of gravity is small as compared with the span of the pendulum on both sides of the rotation axis,a first electrode carried by one major face only of the pendulum symmetrically with respect to the axis,a pair of mutually identical second electrodes formed on the base member, substantially parallel to the first electrode, each located on one side of the rotation axis and each forming a respective capacitor with a respective portion of the first electrode, andmeans for applying respective voltages to said second electrodes for generating a rebalancing electrostatic field restoring the pendulum to a predetermined balanced condition,wherein the pendulum has a shape of a sheet symmetrical with respect to the rotation axis, both sides of the major face of the sheet opposed to the major face carrying the pendulum electrodes being each formed with a plurality of recesses and the recesses located on one side of the rotation axis being different from the recesses located on the other side of the rotation axis.

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