Railway Wheel Fluorescent Magnetic Particle Inspection Defect Recognition System

Magnetic crack inspection is a kind of general Non Destructive Testing methods. It is used to detect the surface cracks of ferromagnetic material. Fluorescent magnetic particle inspection has been widely used because of its high sensitivity, brief and dependable craft. In this paper, the characteristics of railway wheelsets images are analyzed, the characters of the defects on railway wheelsets surface are investigated, and the defects are sorted. The segmentation method, adaptive dynamic threshold, on the basis of the edges and the special structure between the edges, is studied. On the basis of analyzing the unique characteristic of railway wheelsets and its surface cracks, feature extraction and crack identification methods of segmented images are performed. The fake crack identification methods of using grads and special related degree of pixels arepresented. At last, synthesizing the characteristic of inspection pipelining and the research all above, fluorescent magnetic crack inspection system is designed. The system plans the pipelining flow reasonable and makes the system models work in phase, the fluorescent magnetic crack inspection system is realized。...