Abstract:In order to realize correct and fast recognition of parts’ pose on Coordinate Measuring Machine (CMM), a single camera stereo vision recognition method based on the translation of CMM was proposed, and its principles, solution and recognition procedure of the pose parameters were studied. According to the double-camera stereo vision principles, an image of the part to be measured is captured by the CCD camera, which is driven by CMM along its x or y axis, on two different positions correspondingly. Thus, the part’s single camera stereo vision measurement is realized with the image matching on two images of the same feature point to be measured on the part, and each feature point’s 3D coordinates in the camera coordinate system can be obtained. Then, using the camera calibration parameters, each feature point’s 3D coordinates in the machine coordinate system can be calculated. At last, combining with each feature point’s 3D coordinates in the part CAD coordinate system, the part’s pose parameters can be solved. The recognition system was set up, and experiments were conducted. Experimental results show that the recognition method is correct and practical, which can meet the real-time measuring requirement.
