Eddy current detection of the surface cracks in the headings of brake tubes, including the making of testing probe, computer control and the design of mechanical driving mechanism is described.
介绍油管镦头表面裂纹涡流检测方法，包括探头的制作以及计算机控制过程和机械传动机构设计。
2
A series of techniques for making the EMI sensor based on the theory of ElectroMagnetic Induction, eddy current effect and skin-effect were introduced.