主动式电磁检测技术理论研究(英文)

Theoretical research on active electromagnetic detection technology

针对传统电磁检测技术不能适应复杂环境下工件缺陷检测的情况,提出了主动式电磁检测技术,该技术能根据工件厚度对装置进行主动调整。在设计主动式电磁检测装置的基础上,重点对其中的工件厚度测量方法进行研究。建立了基于透射式涡流检测的工件厚度测量模型,利用Matlab软件对模型进行仿真分析,最后搭建实验平台进行两组工件厚度测量实验,对比实验检测结果与理论计算值,两组实验检测误差分别为0.76%及1.46%。仿真及实验结果表明:基于透射式涡流检测建立的工件厚度测量模型是可行的。

Since the traditional electromagnetic detection technique can not be effectively used to defect the detec- tion for workpiece in the complicated environment, the active electromagnetic detection technique could take the initiative to adjust the device according to the thickness of workpiece and it was presented in this paper. The key point of this research was focused on the measurement method for workpiece with different thickness by designing the active electromagnetic detection for the device. Based on transmission-type eddy current detection technique, the model of thickness measurement of workpiece was established and analyzed. Furthermore, the experimental platform was set up to conduct the measurement experiments with two groups of thickness. Through the compari- sons between the experimental results and the theoretical analysis, it was found that the errors of experimental de- tection of these two groups are 0. 76% and 1.46% respectively. It could be safely concluded that the proposed model in this paper is feasible to measure the thickness of workpiece by using transmission-type eddy current de- tection.