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Virtual RPM sensor

  • US 7,031,873 B2
  • Filed: 05/16/2003
  • Issued: 04/18/2006
  • Est. Priority Date: 06/07/2002
  • Status: Expired due to Fees
First Claim
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1. A method for estimating the operating speed of a machine from time-based vibration data samples obtained from a vibration transducer, comprising the steps of:

  • (a) acquiring said time-based vibration data samples from said vibration transducer in physical constant with said machine;

    (b) filtering said acquired time-based vibration data samples in order to obtain maximum low order vibration components while eliminating other components;

    (c) estimating machine operating speed using said filtered time-based vibration data samples;

    (d) fine tuning said machine operating speed estimate using a continuous vibration model; and

    (e) providing said fine tuned machine operating speed estimate to a user.

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