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Lookup NU author(s): Professor Bin Gao,
Professor Gui Yun Tian,
This is the authors' accepted manuscript of an article that has been published in its final definitive form by IEEE, 2019.
For re-use rights please refer to the publisher's terms and conditions.
IEEE Pulsed Remote field eddy current (PRFEC) technique has been utilized broadly in detection of tubular material because of its abundant frequency spectrums with lower power consumption. A novel multi-layer magnetic focusing sensor structure is proposed for PRFEC. The new sensing structure consists of several promising characteristics. It significantly enhances the detectability of the deeper depth of ferromagnetic material, and provides detection capability without covering U type component. Both driver and receiver coil are integrated in the same sensing structure while the traditional methods are put them separated. The theoretical derivation based on electromagnetic principles has been developed for analyzing and interpreting the results. In addition, number of experiments and simulations on different defects have been studied. In experiments, both surface and subsurface defects with different width, depth, inclined angle and circular type have been carried out. The results have confirmed that all types of defects can be detected and it has shown the relatively preferable linear relationships and reliabilities.
Author(s): Yang C, Gao B, Ma Q, Xie L, Tian G, Yin Y
Publication type: Article
Publication status: Published
Journal: IEEE Sensors Journal
Print publication date: 01/04/2019
Online publication date: 14/12/2018
Acceptance date: 02/04/2018
Date deposited: 03/01/2019
ISSN (print): 1530-437X
ISSN (electronic): 1558-1748
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