一、前言金属表面缺陷(如裂纹、折迭)由磁粉或渗透方法检查出来后,精确估计出它的深度和倾角,对存在缺陷的工件使用和加工有着重要的意义。目前常用的一些深度测量方法都假定缺陷与表面垂直。但实际上,大多数缺陷在金属内部并不垂直于表面,而与它倾斜成一定角度。因此,无法从单次的测量中确定出缺陷的深度和倾角。只有采用动态方法沿表面进行连 I. Introduction Metal surface defects (such as cracks, folding) by magnetic or infiltration method to check out, accurately estimate its depth and inclination, the existence of defects in the use and processing of the workpiece is of great significance. Some commonly used depth measurement methods assume that the defect is perpendicular to the surface. In fact, however, most of the defects in the metal are not perpendicular to the surface, but at an angle to it. Therefore, the depth and inclination of defects can not be determined from a single measurement. Only use dynamic methods along the surface