Identification of Multiple Cracks from Eddy Current Testing Signal by Image Processing Using a Template Matching Method

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  • テンプレートマッチングを用いた画像処理による渦電流探傷信号からの複数き裂の同定
  • テンプレート マッチング オ モチイタ ガゾウ ショリ ニ ヨル ウズデンリュウタンショウ シンゴウ カラ ノ フクスウ キレツ ノ ドウテイ

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Abstract

This paper describes a novel method identifying the number and positions of cracks. Using the ECT signal obtained by two-dimensional scanning as a picture image, a template matching method with help of genetic algorithms is applied to predict the number and positions of cracks. The present method employs a superposition of crack signals and a nonlinear scaling technique of a signal profile on crack length which are verified by numerical simulation. The number and positions of cracks are predicted sufficiently.

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