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Issue title: Selected papers from the International Symposium on Applied Electromagnetics and Mechanics - ISEM 2019
Guest editors: Jinhao Qiu, Ke Xiong and Hongli Ji
Article type: Research Article
Authors: Song, Jinga | Zhao, Yanzhena;
Affiliations: [a] School of Electrical Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi, China
Correspondence: [*] Corresponding author: Yanzhen Zhao, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi, China. E-mail: zhaoyzh@mail.xjtu.edu.cn
Abstract: Quantitative evaluation of surface cracks using detection signal is of great significance for accurate prediction of cracks in eddy current testing. It is very difficult to evaluate both the width and depth of small cracks. A quantitative evaluation method based on Bayesian network is proposed for estimating the width and depth of surface cracks in the ferromagnetic materials. First, the simulation model of eddy current testing (ECT) is established and verified by the experimental results. Then, the variation of induced voltage with crack size is studied. Four feature points of real and imaginary part of induced voltage of the receiver coil are selected to characterize the crack size. Finally, a Bayesian network is applied to evaluate the crack size based on numerical simulation results. The evaluation results show that Bayesian network can accurately estimate the width and depth of small cracks.
Keywords: Eddy current testing, surface crack, quantitative evaluation, Bayesian network
DOI: 10.3233/JAE-209423
Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 64, no. 1-4, pp. 1073-1079, 2020
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