铁磁性构件缺陷的脉冲涡流检测模式研究  

Research on detection modes of ferromagnetic component defects using pulsed eddy current

作　　者：周德强[1] 潘萌[1] 常祥[1] 王华[1] 曹丕宇 

机构地区：[1]江南大学机械工程学院江苏省食品先进制造装备技术重点实验室,无锡214122

出　　处：《仪器仪表学报》2017年第6期1498-1505,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51107053);中国博士后基金(2012M520994);无损检测技术教育部重点实验室基金(2D201629001)项目资助

摘　　要：针对铁磁性材料的脉冲涡流检测信号比较复杂的问题,建立脉冲涡流矩形传感器检测模型,提出了矩形探头中同时存在脉冲涡流与脉冲漏磁检测区域,并进行脉冲电磁检测的仿真分析,研究了缺陷和矩形探头轴线所呈角度的最佳检测位置。仿真和实验结果表明了矩形探头的脉冲涡流有效检测区域为探头正下方的边框区域,而脉冲漏磁有效检测区域为矩形线圈中心的正下方区域。脉冲涡流最佳检测点为矩形探头轴线与缺陷呈10°附近位置,而脉冲漏磁最佳检测点为矩形探头轴线与缺陷呈70°位置。Aiming at the complex signals of pulsed eddy current sensor for ferromagnetic materials, a detection model of pulsed eddy current rectangular sensor based on finite element is established. This paper proposes that there are pulsed eddy current detection area and pulsed magnetic flux leakage detection area in pulsed eddy current rectangular sensor. The simulation analysis of pulsed electromagnetic detection is carried out. The best detection position of the angles between the defect and the axis of the rectangular probe is studied. Both simulation and experiment results show that the effective detection area of the pulsed eddy current of the rectangular probe is the border area under the probe, and the effective detection area of the pulsed magnetic flux leakage detection is the area under the center of the rectangular coil. The best detecting point of pulsed eddy current is the position at the angle of 10° between the defect and the axis of the rectangular probe, and the best detecting point of pulse magnetic flux leakage is the position at the angle of 70° between the defect and the axis of the rectangular probe.

关 键 词：脉冲涡流 矩形探头 铁磁性金属 检测点 

分 类 号：TG115.28[金属学及工艺—物理冶金] TH878[金属学及工艺—金属学]