Our country introduce into the technology of straddled-type monorail PC beam for the first time. It's main features are as follows:using beam substitute the rail,this beam not only have the function of carrying the train as traditional bridge, but also the oriented function . Thus it's called PC rail-beam configuration system in general.In the use of beams, the surface can be damaged by the train or the factor of nature, such as cracks. Surface test is difficult and dangerious as the beam is very long and high for human. To manage and service all the beam, we must improve the level of test. So it is useful of automatic testing the surface of beam , not by people.Only using this methed, the test of beam surface can be efficient.This paper study the detect and identify technology of the beam surface on the base of analysis of the beam surface feature.. We put forward the test system of beam surface's damage, which collecting the beam surface's image, using camera in the condition of fit illumination, and save the image to the disk, then process them online or not. First, we filter the noise , then pick-up the damage region from the surface image by the arithmetic of image division. Then calculate the area of the damage and give the condition of the beam.In the application, this method is rapid and accurate. It give the damage of beam surface and the evidence by which we repair the beam surface. We can test the damage of beam surface usually, then can solve the problem in time. |