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Vector-Based Eddy-Current Testing Method

By Cheng Li, Runcong Liu, Shangjun Dai, Nianmei Zhang and Xiaodong Wang

Abstract

We present a type of eddy-current testing (ECT) method based on measuring the reaction of the Lorentz force by using a small permanent magnet (PM) as the probe. The means of measuring impedance is superseded by measuring force. By analyzing the variations in different components of the reaction of Lorentz force, the defects characteristics within the measured conductor can be revealed. The results indicate that the vector-based eddy-current testing method obtains good quantitative results and precisely evaluates the lift-off effect during measurement along two orthogonal directions. Numerical simulations are performed to provide supports for the experimental results. The method described in this paper may have great potential for use in industrial nondestructive testing applications

Topics: eddy current testing, Lorentz force, magnetic field, lift-off effect, Technology, T, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
Publisher: MDPI AG
Year: 2018
DOI identifier: 10.3390/app8112289
OAI identifier: oai:doaj.org/article:25d3518d63d14bd1a81896348c9dd391
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