非磁性航空金属构件检测中 脉冲远场涡流传感器的仿真设计

在分析脉冲远场涡流检测原理的基础上,采用U型罩结构模拟管道,成功的将脉冲远场涡流技术应用到了非磁性金属平板的检测中；仿真设计了空心、聚磁、连通磁路3种传感器模型,比较了不同模型过渡区的远近、对缺陷检测的灵敏度及对不同厚度平板的检测能力.仿真结果表明:带连通磁路的传感器模型不仅可以将激励与检测线圈之间的距离从20 mm缩短至10 mm,还可以提高对缺陷检测的灵敏度,同时,带连通磁路的传感器模型对厚度为11 mm以上的平板具有更强的检测能力.

Simulation Design of Pulsed Remote Field Eddy Current Probe for Nonmagnetic Metal Aviation Component

Based on the analysis of pulsed remote field eddy current principle,this article applied the pulsed remote field eddy current technology in the detection of nonmagnetic aviation metal plate components with using U-type component,simulated and designed hollow model,assembled magnetic model, connected magnetic circuit model,compared the distance of the three models'' transition zone,the defects detection sensitivity, and the detection capability of the three models for different thickness plates.The simulation results show that, with connected magnetic circuit of the sensor model can not only narrow the distance between the excitation and detection coil from 20 mm to 10 mm,but also can improve the sensitivity of defects detection,while it has a stronger detection capability for more than 11 mm thickness plates.