LIU Zheng-ping, WANG Yan. Study on analysis methods of coil impedance of eddy current sensor[J]. 2008, 27(12): 51-53. DOI: 10.13873/j.1000-97872008.12.021.
涡流传感器线圈的阻抗分析法研究
摘要
针对涡流传感器的线圈阻抗值分析法问题
提出了理论计算和有限元法2种方法。介绍了线圈阻抗的级数表达式。在解析型设计的基础上
以厚度为S的线圈为求解对象
建立有限元模型
通过有限元仿真得到传感器磁力线分布和线圈阻抗图。最后将仿真结果与理论推导结果相对照
结果表明:仿真结果与实际传感器的特性是吻合的。
Abstract
To research the analysis methods about the coil impedance of eddy current sensor
two analysis methods
theoretic method and finite element method
are proposed.The series expression of the coil impedance is introduced.On the basis of analytical calculation
the computational model of the coil impedance is simplified as a cylindrical coil over a cylindrical measured target with the thickness S.The coil impedance value and the magnetic distribution figures are obtained by finite element analysis
respectively.Finally
the results from the derivation and finite element analysis are in agreement very well by comparison.