A method of multi-crack shape identification from eddy current testing signals of steam generator tubes including support plates as noise sources

Yoshiaki Nagaya; Hisashi Endo; Toshiyuki Takagi; Tetsuya Uchimoto

doi:10.1299/kikaia.71.254

A method of multi-crack shape identification from eddy current testing signals of steam generator tubes including support plates as noise sources

Yoshiaki Nagaya, Hisashi Endo, Toshiyuki Takagi, Tetsuya Uchimoto

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

This paper deals with identifying multiple cracks from eddy current testing (ECT) signals obtained in a steam generator tube with a support plate and deposits. Assume two-dimensionally scanned ECT signals to be a picture image, then the signal processing by a multi-frequency technique eliminates noise caused by the support plate and deposits. A template matching with help of genetic algorithms detects number and positions of cracks from the image after the signal processing. Inverse analysis estimates the crack profile based on the predicted position of cracks. The number and positions of the cracks are sufficiently well predicted. Crack shape reconstructions are achieved with a satisfactory degree of accuracy.

Original language	English
Pages (from-to)	254-261
Number of pages	8
Journal	Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	71
Issue number	2
DOIs	https://doi.org/10.1299/kikaia.71.254
Publication status	Published - 2005 Feb

Keywords

Eddy Current Testing
Genetic Algorithms
Inverse Problems
Multiple Cracks
Nondestructive Inspection
Numerical Analysis
Steam Generator Tubes
Support Plates
Template Matching

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1299/kikaia.71.254

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A method of multi-crack shape identification from eddy current testing signals of steam generator tubes including support plates as noise sources. / Nagaya, Yoshiaki; Endo, Hisashi; Takagi, Toshiyuki et al.

In: Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Vol. 71, No. 2, 02.2005, p. 254-261.

Research output: Contribution to journal › Article › peer-review

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abstract = "This paper deals with identifying multiple cracks from eddy current testing (ECT) signals obtained in a steam generator tube with a support plate and deposits. Assume two-dimensionally scanned ECT signals to be a picture image, then the signal processing by a multi-frequency technique eliminates noise caused by the support plate and deposits. A template matching with help of genetic algorithms detects number and positions of cracks from the image after the signal processing. Inverse analysis estimates the crack profile based on the predicted position of cracks. The number and positions of the cracks are sufficiently well predicted. Crack shape reconstructions are achieved with a satisfactory degree of accuracy.",

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A method of multi-crack shape identification from eddy current testing signals of steam generator tubes including support plates as noise sources

Abstract

Keywords

ASJC Scopus subject areas

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