Study of Frequency Domain Lift-off Intersections of Ferromagnetic and Non-ferromagnetic Materials

10.6919/ICJE.202205_8(5).0049

Song Hu

Pulsed Eddy Current Signal ； Ferromagnetic ； Non-ferromagnetic ； Lifting Off Cross Point

International Core Journal of Engineering

8卷5期（2022 / 05 / 01）

406 - 417

英文

In this paper, the signal characteristics of pulsed eddy currents in ferromagnetic and non-ferromagnetic materials are analyzed, the intermediate signal intercepts of pulsed eddy currents are taken, and the method of measuring peel height is derived through experimental verification. Through the analysis of the pulsed eddy current detection signal, it is found that there is a correlation between the intercept of the intermediate signal and the peeling height in the double logarithmic coordinate system. Combining with the revealed characteristics and change law of the peeling intersection, the research on the acquisition and adjustment method of the peeling intersection of the pulsed eddy current signal is carried out in depth by using theoretical modeling, numerical simulation analysis and experiments.

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