Characterization of multiple cracks from eddy current testing signals by a template matching method and inverse analysis

Yoshiaki Nagaya, Toshiyuki Takagi, Tetsuya Uchimoto, Haoyu Huang

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

This chapter describes a method for identifying the number and positions of cracks and reconstructing of the crack shape. Using the eddy current testing signal obtained by 2D scanning as a picture image, a template matching method, with the help of a genetic algorithm is applied to predict the number and positions of the cracks. The present method employs the scaling technique of a signal profile with respect to crack length, which is verified by numerical simulation. The number and positions of the cracks are sufficiently well predicted. Crack shape reconstructions from the predicted data are achieved with a satisfactory degree of accuracy.

Original languageEnglish
Title of host publicationInverse Problems in Engineering Mechanics IV
PublisherElsevier Ltd
Pages185-194
Number of pages10
ISBN (Print)9780080442686
DOIs
Publication statusPublished - 2003 Nov

ASJC Scopus subject areas

  • Engineering(all)

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