03-02-2010 дата публикации
Номер: CN0101639452A
Принадлежит:
The invention relates to a 3D detection method for rail surface defects, which can realize 3D defect online detection on four surfaces of a rail. The method comprises the following steps: laser line light sources are respectively arranged on the top surface, the bottom surface and the two sides of the rail, and the laser lines emitted by the four laser line light sources form a closed curve; meanwhile, 8 area-array CCD cameras are arranged around the rail so as to synchronously acquire a closed area formed by the laser lines; and transferring the laser line image acquired by the camera to a computer, and judging the change condition of a laser line coordinate by extracting the laser lines to detect the 3D defects on the rail surface. In the invention, the method helps transform depth variable quantity of the rail surface into a 2D gray scale image, and detect the 3D defects on the rail surface by a distribution map of surface depth variation so as to detect a defect area by an image processing ...
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