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Motion-induced eddy current thermography for high-speed inspection

Lookup NU author(s): Dr Jianbo Wu, Kong Jing Li, Professor Gui Yun Tian, Junzhen Zhu, Yunlai Gao, Chaoqing Tang, Xiaotian Chen



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2017 Author(s). This letter proposes a novel motion-induced eddy current based thermography (MIECT) for high-speed inspection. In contrast to conventional eddy current thermography (ECT) based on a time-varying magnetic field created by an AC coil, the motion-induced eddy current is induced by the relative motion between magnetic field and inspected objects. A rotating magnetic field created by three-phase windings is used to investigate the heating principle and feasibility of the proposed method. Firstly, based on Faraday's law the distribution of MIEC is investigated, which is then validated by numerical simulation. Further, experimental studies are conducted to validate the proposed method by creating rotating magnetic fields at different speeds from 600 rpm to 6000 rpm, and it is verified that rotating speed will increase MIEC intensity and thereafter improve the heating efficiency. The conclusion can be preliminarily drawn that the proposed MIECT is a platform suitable for high-speed inspection.

Publication metadata

Author(s): Wu J, Li K, Tian G, Zhu J, Gao Y, Tang C, Chen X

Publication type: Article

Publication status: Published

Journal: AIP Advances

Year: 2017

Volume: 7

Issue: 8

Online publication date: 01/08/2017

Acceptance date: 01/07/2017

Date deposited: 28/09/2017

ISSN (electronic): 2158-3226

Publisher: American Institute of Physics Inc.


DOI: 10.1063/1.4997152


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