Flaw Detection And Quantification For
Ferromagnetic Steels Using Pulsed Eddy Current
Techniques And Magnetization
Author(s)
A. sophian, G.Y. Tian, D. Taylor & J. Rudlin
Abstract
Steel is an important industrial material and is used in various structures. Nondestructive
testing (NDT) is required to make sure that these structures meet the
safety requirements and function as intended. Eddy current technique (ECT) is
one of NDT techniques used for steel inspection. The use of ECT in steel
inspection is generally, however, limited due to skin effect and magnetic
property variations, particularly in sub-surface defect detection and
quantification. Ths paper shows how DC magnetic saturation improves the
sensitivity of pulsed eddy current (PEC) sensors in steel inspection and the
theory behmd it. Based on a modelling, a practical study has illustrated the
advantages of the approach. A wavelet-based feature extraction developed from
our previous work ha
Keywords
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