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Method for continuously calibrating an optical vibration sensor

  • US 5,146,776 A
  • Filed: 11/26/1990
  • Issued: 09/15/1992
  • Est. Priority Date: 11/26/1990
  • Status: Expired due to Term
First Claim
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1. A method for calibrating a vibration sensor attached to equipment, comprising the steps of:

  • (a) obtaining a vibration signal, corresponding to vibration of the equipment, from the vibration sensor;

    (b) extracting a beat frequency vibration signal having a beat frequency from the vibration signal obtained in step (a);

    (c) computing a resonant frequency of the vibration sensor in dependence upon the beat frequency extracted in step (b); and

    (d) calibrating the vibration sensor in dependence upon the resonant frequency computed in step (c).

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