Modelling and evaluation of eddy current stimulated thermography

John Wilson, Gui Yun Tian, Ilham Zainal Abidin, Suixian Yang, Darryl Almond

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

Thermographic inspection with eddy current (EC) excitation is an emerging integrative NDTE method with the ability to inspect for defects over large areas. The resultant surface heat distribution from direct EC heating and diffused heat can be obtained easily with a thermal camera, but techniques for the determination of heating mechanisms around a particular defect for quantitative defect characterisation are required. In this paper, numerical modelling and experimental studies are applied to understand EC stimulated thermography on simple discontinuity defects, including transient EC distribution and heating propagation for slots and notches. This fundamental understanding of transient EC distribution and heating propagation will aid in the development of feature extraction and pattern recognition techniques for the quantitative analysis of EC thermography images and defect characterisation.
Original languageEnglish
Pages (from-to)205-218
Number of pages14
JournalNondestructive Testing and Evaluation
Volume25
Issue number3
DOIs
Publication statusPublished - Sep 2010

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