Evaluating the III-posedness of inverse problem to size flaws from eddy current NDT signals obtained with an absolute type probe

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

This study discusses the applicability of eddy current testing to the non-destructive evaluation of the depth of a flaw. Three-dimensional finite element simulations are carried out to calculate eddy current signals due to a flaw, and subsequent calculations correlate the difference between signals due to two flaws with the difference between the depths of the flaws. Standard deviation of the difference between the depths of the flaws is used to discuss the ill-posedness of the problem. A flaw is modeled as a sufficiently long rectangular region with a constant width and uniform electrical conductivity; an absolute pancake probe is considered. This study reveals that lift-off and coil diameter do not have a large effect on the ill-posedness, which supports that it is reasonable to decide parameters in actual inspections so that signal-to-noise ratio is maximized. The results obtained also indicate the difficulty in evaluating the depth of a flaw deeper than 1 mm using the signals obtained using an absolute pancake probe.

本文言語English
ホスト出版物のタイトルMechanical and Electrical Technology VI
出版社Trans Tech Publications Ltd
ページ337-341
ページ数5
ISBN(印刷版)9783038352051
DOI
出版ステータスPublished - 2014
イベント6th International Conference on Mechanical and Electrical Technology, ICMET 2014 - Bangkok, Thailand
継続期間: 2014 7月 172014 7月 18

出版物シリーズ

名前Applied Mechanics and Materials
619
ISSN(印刷版)1660-9336
ISSN(電子版)1662-7482

Other

Other6th International Conference on Mechanical and Electrical Technology, ICMET 2014
国/地域Thailand
CityBangkok
Period14/7/1714/7/18

ASJC Scopus subject areas

  • 工学(全般)

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