Development of nondestructive evaluation and analysis system for complicated defects by using advanced magnetic sensors

为了对复杂的缺陷或裂纹进行定量无损检测，采用先进的磁通门传感器磁通传感器测量了缺陷周围的漏磁分布。建立了缺陷漏磁分布与磁偶极矩之间的关系式。通过使用Tikhonov正则化等逆分析技术，可以获得磁偶极矩，并对复杂缺陷的宽度、形状和大小进行评估。利用先进的磁传感器测量技术和磁逆分析技术，构建了复杂裂纹或缺陷的无损评价分析系统。

In order to establish quantitative nondestructive evaluation of complicated defects or cracks, magnetic flux leakage distribution around defects was measured using advanced magnetic sensor of fluxgate sensor. And the relationship between magnetic flux leakage distribution and magnetic dipole moment of defect was formulated. By using inverse analysis technique such as Tikhonov regularization, magnetic dipole moment could be obtained and the width, shape and size of complicated defects were evaluated. It was concluded that nondestructive evaluation and analysis system for complicated cracks or defects was constructed by using advanced magnetic sensor measurement and magnetic inverse analysis technique.