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Vibratory digital integrating accelerometer

  • US 4,699,006 A
  • Filed: 02/04/1986
  • Issued: 10/13/1987
  • Est. Priority Date: 03/19/1984
  • Status: Expired due to Fees
First Claim
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1. Apparatus for sensing the magnitude of acceleration along an input axis, such apparatus comprising:

  • a base, defining an opening transverse to the input axis;

    a sheet member, pivotally suspended from the base over the opening by at least one torsion spring for reciprocating angular motion about a first axis lying in the sheet member;

    a weight, having a center of gravity offset from the sheet member along an input axis;

    suspension means, suspending the weight to the sheet member for displacement with respect to the first axis, such displacement being responsive to acceleration along the input axis;

    the movable system consisting of the sheet member, the suspension means, the weight and the at least one torsion spring being characterized by a natural frequency of angular motion about the first axis, said natural frequency varying subject to displacement of the weight, whereby the natural frequency of angular motion of such movable system is representative of the acceleration along the input axis; and

    means for sensing said natural frequency.

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