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Analytical model of tilted driver-pickup coils for eddy current nondestructive evaluation

Lookup NU author(s): Professor Gui Yun TianORCiD


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© 2018 Chinese Physical Society and IOP Publishing Ltd. A driver-pickup probe possesses better sensitivity and flexibility due to individual optimization of a coil. It is frequently observed in an eddy current (EC) array probe. In this work, a tilted non-coaxial driver-pickup probe above a multilayered conducting plate is analytically modeled with spatial transformation for eddy current nondestructive evaluation. Basically, the core of the formulation is to obtain the projection of magnetic vector potential (MVP) from the driver coil onto the vector along the tilted pickup coil, which is divided into two key steps. The first step is to make a projection of MVP along the pickup coil onto a horizontal plane, and the second one is to build the relationship between the projected MVP and the MVP along the driver coil. Afterwards, an analytical model for the case of a layered plate is established with the reflection and transmission theory of electromagnetic fields. The calculated values from the resulting model indicate good agreement with those from the finite element model (FEM) and experiments, which validates the developed analytical model.

Publication metadata

Author(s): Cao B-H, Li C, Fan M-B, Ye B, Tian G-Y

Publication type: Article

Publication status: Published

Journal: Chinese Physics B

Year: 2018

Volume: 27

Issue: 3

Print publication date: 01/03/2018

Acceptance date: 02/04/2016

ISSN (print): 1674-1056

ISSN (electronic): 2058-3834

Publisher: Institute of Physics Publishing


DOI: 10.1088/1674-1056/27/3/030301


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