脉冲涡流检测中传感器空间位置变化对检测结果影响规律的仿真分析

在脉冲涡流检测中，为了研究传感器空间位置变化对检测结果的影响规律，通过AN—SYS有限元仿真的方法，分析了传感器水平和垂直位置变化对感应电压信号及缺陷附近电磁场分布的影响。仿真结果表明，传感器位于水平及垂直方向的不同检测位置时，前者可通过感应电压得到峰值时的检测位置，实现对缺陷的边缘检测，后者的感应电压信号具有提离交叉点。仿真结果为试验研究传感器空间位置变化对检测结果的影响提供了理论指导。

Simulation on Testing Results Influenced by the Variation of Sensor Space Position with Pulsed Eddy Current Testing

In the course of pulsed eddy current nondestructive testing（NDT）, in order to study the disciplinarian of testing results influenced by the variation of sensor space position, induction voltage of the detecting coil and distributions of electromagnetic fields near defect, influenced by the level and upright variations of sensor space position, are analyzed using ANSYS finite element simulation method. Simulating results proved that when the sensor lies in different level or upright detecting positions, the edge of defects can be detected through the detecting positions at the peaks of induction voltage in the first situation, and the signals of induction voltage intersect at a point in the other. Simulating results provide theoretical guidance for studying testing results influenced by variations of sensor space position on experimentation.