放置式涡流线圈测厚数值分析

Numerical value analysis of thickness measurement on placement eddy current probe coil

本文利用ANSYS有限元分析软件进行数值模拟,针对非磁性金属基体上非导电覆盖层厚度的影响,建立了涡流检测线圈的二维模型,求解了涡流检测线圈的阻抗变化,并对其阻抗值进行了归一化。计算得到的仿真结果与实际的传感器特性是吻合的,从而为涡流检测的原理分析、传感器设计和实际应用提供了一种有效的分析方法和参考依据。

In this paper, numerical simulation is done by ANSYS finite element analysis software. According to the variation of thick- ness of noneonduetive cladding over nonmagnetic workpiece, the two - dimension model of the probe coil is built, the impedance varia- tion of probe coil is acquired, and normalization of the impedance value of the probe coil is realized. The calculated simulative result is coincident with the traits of the real transducer. Thus, an effective analysis method and reference basis is consequently offered for the research of ECT theory, transducer design and practical application.