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Method and apparatus for processing electrical signals and a stress wave sensor

  • US 5,176,032 A
  • Filed: 06/02/1992
  • Issued: 01/05/1993
  • Est. Priority Date: 02/21/1990
  • Status: Expired due to Term
First Claim
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1. A method of processing an outlet signal from a transducer, the outlet signal from the transducer corresponding to an acoustic emission activity generated by a process, comprising filtering and enveloping the transducer output signal to produce an electrical signal, removing a direct current component from the electrical signal, measuring an alternating current component of the electrical signal for variations which are indicative of variations in the process producing the acoustic emission.

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