Analytical modelling and simulations for high-frequency eddy current testing with planar spiral coils

被引：14
作者：
Cao, Binghua [1 ]
Li, Xiaohan [1 ]
Wang, Mengyun [1 ]
Fan, Mengbao [2 ]
机构：
[1] China Univ Min & Technol, Sch Informat & Control Engn, Xuzhou, Jiangsu, Peoples R China
[2] China Univ Min & Technol, Sch Mechatron Engn, Xuzhou, Jiangsu, Peoples R China
来源：
NONDESTRUCTIVE TESTING AND EVALUATION | 2021年 / 36卷 / 02期
基金：
中国国家自然科学基金;
关键词：
High-frequency eddy current; analytical model; spiral coil; displacement current; THICKNESS MEASUREMENT; CURRENT RESPONSE; INSPECTION;
D O I：
10.1080/10589759.2020.1714614
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
An analytical model of eddy current field under sinusoidal excitation of a planar spiral coil is established, taking into account the gap between the turns of a spiral coil and displacement current. The developed model is firstly validated by FEM and experiments, and then was applied to investigate the influences of displacement current on eddy current signal. The results show that the increase of the excitation frequency and the permittivity of the specimen, the influence of the displacement current increase as well for thin samples. Basically, high-frequency eddy current testing allows for the measurement of relative permittivity of thin samples.
引用
收藏
页码：195 / 208
页数：14
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