Study on Eddy-current Nondestructive Testing Method of the Double-layers Conductive Coating Thickness

被引：2
|
作者：
Gao K. [1 ]
Yu Y. [1 ]
Yang J. [1 ]
Shen P. [2 ]
机构：
[1] School of Mechatronics Engineering, University of Electronic Science and Technology of China, Chengdu
[2] School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an
来源：
Yu, Yating (wzwyyt@uestc.edu.cn) | 1600年 / Chinese Mechanical Engineering Society卷 / 53期
关键词：
Decoupling algorithm; Eddy current testing; Multi-frequency excitation; Multiple-layered conductive coating thickness;
D O I：
10.3901/JME.2017.14.114
中图分类号：
学科分类号：
摘要：
The multiple-layered coating structure can significantly improve the heat resistance, wear resistance and corrosion resistance of the substrate material and therefore is applied widely in aerospace, petroleum and chemicals, and shipbuilding fields. The coating thickness plays key role in improving the substrate material performances. An eddy current nondestructive approach is presented to measure the coating thickness of the multiple-layered conductive coating structure. Above all, the interactions between the different layer thickness and the interaction of the coating thickness and coating conductivity on the detection signal are investigated by using numerical and experimental study. Thereafter, an approach to detect the coating thickness is proposed based on the decoupling algorithm, which is verified by the experiment. The experiment results indicate that the calibration values of coating thickness and those detected from the experiment agree well within the relative error of 10%. This approach can be extended further to the coating thickness measurement for the three-layered structure or four-layered structure. © 2017 Journal of Mechanical Engineering.
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页码：114 / 119
页数：5
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