基于铝屏蔽的铁磁性构件缺陷脉冲涡流检测研究  

Research on ferromagnetic metal defects using pulsed eddy current testing based on aluminum shielding

作　　者：王蓉 周德强 

机构地区：[1]江苏省无锡汽车工程中等专业学校,江苏无锡214153 [2]江南大学机械工程学院,江苏无锡214122

出　　处：《电子设计工程》2016年第8期159-162,共4页Electronic Design Engineering

基　　金：国家自然科学基金项目(51107053);中国博士后基金项目(2012M520994)

摘　　要：针对铁磁性金属的缺陷检测,建立了铝屏蔽(真空磁屏蔽)与非屏蔽下的脉冲涡流检测有限元仿真模型,仿真分析了铁磁性材料下的电涡流与磁力线分布,并通过实验证实了仿真分析的有效性。仿真与实验结果表明:铝屏蔽下的脉冲涡流检测方法能有效的提高铁磁性材料的表面缺陷检测灵敏度,但对铁磁性金属内部缺陷检测效果不明显。Aiming at the defects detection of ferromagnetic, the circle probes of the finite element models with aluminum shielding（vacuum magnetic shielding）and without shielding were built. Distribution of eddy current and magnetic field for two metal materials were simulated. The validity of simulation analysis was demonstrated by experimental results. The results show that the aluminum magnetic shielding of pulsed eddy current can improve effectively the sensitivity on surface defects of ferromagnetic metal. However, it is not obvious that it can not improve the sensitivity of internal defects of ferromagnetic metal defects.

关 键 词：脉冲涡流 有限元分析 铁磁性 

分 类 号：TN06[电子电信—物理电子学]