脉冲涡流圆柱型探头参数的优化设计  

Optimization Design of Pulsed Eddy Current Circular Probe

作　　者：周德强 张斌强[2] 王海涛[3] 尤丽华 盛卫峰 

机构地区：[1]江南大学机械工程学院,无锡214122 [2]太原航空仪表有限公司,太原030006 [3]南京航空航天大学自动化学院,南京210016

出　　处：《无损检测》2012年第9期7-11,共5页Nondestructive Testing

基　　金：国家自然科学基金青年基金资助项目(051107053)

摘　　要：介绍了脉冲涡流检测的工作原理。通过有限元对圆柱型探头不同参数的线圈周围磁场和被检试件中感生涡流的分布进行了仿真,得出了扁平型的激励线圈产生的磁通量能够有效地渗透到被检试件的内部,有利于系统检测灵敏度的提高。通过不同激励频率在试件中的涡流密度、渗透深度的分析,能够根据脉冲涡流检测对象,得到探头中所用的最佳工作频率,为脉冲涡流探头的实际检测奠定基础。The paper introduced the theory of pulsed eddy current（PEC） testing. Based on Finite Element Method software, the distribution of magnetism and eddy current was presented for PEC circular probe. The results showed that the eddy current of flat excited coils could be effective to penetrate inside the metal sample, and it could improve the sensitivity of the testing system of PEC testing. Through the analysis of the eddy current density and the penetrating depth for the different excited frequency, the best excited frequency could be concluded. It will provide the guide of PEC probe design.

关 键 词：脉冲涡流检测 涡流密度 渗透深度 有限元 

分 类 号：TG115.28[金属学及工艺—物理冶金]