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Apparatus and a method for locating a source of acoustic emission in a material

  • US 5,270,950 A
  • Filed: 09/17/1991
  • Issued: 12/14/1993
  • Est. Priority Date: 10/17/1990
  • Status: Expired due to Fees
First Claim
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1. An apparatus for locating a source of acoustic emissions in a material comprising:

  • at least three spaced transducers acoustically coupled to the material, each transducer being arranged to detect acoustic emissions in the material and being arranged to produce a corresponding electrical output signal,measuring means to measure the time taken for each of the electrical output signals to equal or exceed at least two predetermined amplitudes from a datum time,means for analyzing the values of time taken for each of the electrical output signals to equal or exceed each of the at least two predetermined amplitudes for a plurality of artificially induced acoustic emission events having known locations to infer a mathematical relationship between the values of time for each of the electrical output signals and the location of a source of acoustic emission,means for storing the deduced mathematical relationship,means for calculating from the values of time taken for each of the electrical output signals to equal or exceed each of the at least two predetermined amplitudes for an acoustic emission of unknown source location and the stored mathematical relationship the location of the source of the acoustic emission.

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