摘要
研究了多层厚度的电涡流检测原理和有限截面线圈置于多层结构上其各种参数与阻抗变化关系的数学模型 ;建立了用于多层厚度检测的涡流检测系统 ,对两层厚度的检测进行了几种检测电压值 -厚度回归模型实验研究 ,并对反演计算结果进行了比较分析 。
The impedance change model of a probe coil of rectangular cross section above a structure with an arbitrary number of parallel layers and the principle of multi-layered thickness measurement using eddy current testing method are studied. An ECT system for multi-layered thickness measurement is developed and several fitting models of impedance/voltage measurements-thickness relations are put forward using least square method and the evaluation of multi-layered thickness is performed after inverting the output voltage of the testing system. The best fitting and inversion models are presented.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2003年第15期1278-1281,共4页
China Mechanical Engineering
关键词
多层结构
厚度检测
涡流检测
多频
反演
multi-layered structure thickness measurement eddy current testing(ECT) multi-frequency inversion
