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Development of defect detection technique for ultrasonic nondestructive evaluation using blind deconvolution and EMD

  • Journal of Knowledge Information Technology and Systems
  • Abbr : JKITS
  • 2011, 6(3), pp.39-46
  • Publisher : Korea Knowledge Information Technology Society
  • Research Area : Interdisciplinary Studies > Interdisciplinary Research
  • Published : June 30, 2011

MyungWoo Nam 1 이영석 2

1혜전대학
2청운대학교

Candidate

ABSTRACT

In this paper, we proposed new method using empirical mode decomposition and blind deconvolution for defect detection technique of ultrasonic nondestructive evaluation. At first, the maximum energy signal among IMFs obtained from EMD was selected and used by blind deconvolution method. Next, impulse signal was made by inverse filter from using blind deconvolution method in time domain. In order to evaluate the proposed method, the conventional methods were compared using the specimen with artificial defects. From the experiment results, the proposed method can be confirmed that it can detect the defect location more accurate than conventional methods.

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