Identification of multiple cracks from eddy current testing signal by image processing using a template matching method

Yoshiaki Nagaya, Toshiyuki Takagi, Haoyu Huang, Tetsuya Uchimoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)1236-1243
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume69
Issue number8
DOIs
Publication statusPublished - 2003 Aug

Keywords

  • Eddy current testing
  • Genetic algorithm
  • Inverse problem
  • Multiple cracks
  • Nondestructive inspection
  • Numerical analysis
  • Pattern recognition
  • Steam generator tubes
  • Template matching

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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