涡流法测量碳纤维复合材料涂层厚度的研究

Researh on Thickness Measureing of Carbon Fiber Composite's Coating with Eddy Current Testing

结合碳纤维复合材料特有的属性及组织特点,利用ANSYS软件建立涡流法测量复合材料上涂层厚度的三维仿真模型,分析了电导率不均匀条件下涂层厚度变换对检测线圈阻抗的影响。结果表明：通过选择合适的检测频率（600~700 kHz）可以使探头线圈阻抗与涂层厚度有很好的线性相关性;试验结果与理论分析结果一致,说明涡流法测量特种复合材料涂层厚度有较好的分辨力,为实现涡流法高精度测量特种复合材料涂层厚度提供了理论依据和试验支持。

Acording to material attributes and organization characteristics of carbon fiber composite material, three-dimensional simulation of eddy current test method for measuring the coating thickness of the composite material was carried out using ANSYS software, analysed the effect of changes in the coating thickness of the coil impedance under the conditions of non-uniform conductivity. The results show that selecting detection frequency （ 600 - 700 kHz）, the coil impedance and coating thickness will have good linear correlation. The results of experiment and simulation calculation have good consistency. Indicates that the eddy current method to measure coating thickness special composite material has good resolution, which provides a reliable theory basis and technical support for realizing high- accuracy measurement of carbon fiber composite coating thickness using eddy current testing method.