基于模块组合式阵列的三维漏磁检测系统

3D Weak Magnetic Signals Detecting System Based on Module Combination Array

为了研究阵列传感器在试件上大面积扫查检测的问题,研制了一种基于模块组合式AMR磁阻传感器阵列的三维弱磁信号检测系统。检测系统由结构相同的标准模块组成,每个模块可同时采集X、Y、Z三个方向的磁信号。对含预制裂纹的16MnR钢平板试件进行检测实验,并采集试件表面的磁信号。结果表明:可重配置式三维阵列探头对表面裂纹具有较高的灵敏度,并对亚表面裂纹具有一定的辨识能力;三维阵列探头可有效扩大检测范围,并通过对磁阵列信号成像可得到裂纹的形状及所处的位置信息。

In order to study detection problems of the array sensor when scanning on the large area,the system based on AMR magneto-resistive sensor of module combination type was designed and produced to detect magnetic signals. The system was composed of standard modules with the same structure and each unit may pick up X,Y,Z three-dimensional magnetic signals. The16 MnR steel specimen which contained cracks was detected by the system,collecting X,Y,Z array magnetic signals. The results show that,the system has high sensitivity,and can recognize the surface crack in some way. The probe can also effectively expand the inspection scope. Meanwhile,the shape and position information of cracks can be obtained through imaging of the magnetic array signals.