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METHODS AND SYSTEMS FOR DETECTING DEFECTS IN WELDED STRUCTURES UTILIZING PATTERN MATCHING

  • US 20110023609A1
  • Filed: 08/03/2009
  • Published: 02/03/2011
  • Est. Priority Date: 08/03/2009
  • Status: Active Grant
First Claim
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1. A method for determining if a defect is present in a weld from ultrasonic response signals collected from a plurality of measurement locations along a weld, the method comprising:

  • filtering an ultrasonic response signal from each of the measurement locations to produce a filtered response signal for each of the measurement locations;

    calculating an ultrasonic energy for each of the measurement locations with the corresponding filtered response signal;

    comparing the ultrasonic energy for each measurement location to the ultrasonic energy of adjacent measurement locations to identify potential defect locations, wherein, when the ultrasonic energy of a measurement location is less than the ultrasonic energy of the adjacent measurement locations, the measurement location is a potential defect location; and

    analyzing fluctuations in the ultrasonic energy at measurement locations neighboring the potential defect locations to determine if a defect is present in the weld.

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