Research On Drilling Detection And Location System Based On Machine Vision

With the development of social economy,the shortage of labor is becoming more and more prominent,and industrial automation has become an inevitable trend in the future.Machine vision technology has been applied in various fields of national economy because of its advantages of non-contact,high speed and high precision.According to the requirement of an enterprise to carry on the automatic reconstruction project to the container floor,this paper introduces the machine vision technology to the project.The paper has finished the following tasks:(1)By means of Sobel and Canny edge detection operator,the experimental results show that the Canny edge detection operator is better than the Sobel operator in image processing.In the edge detection of the camera image acquisition,the Canny operator can be used to achieve the requirements.(2)When the image is matched,the image is symmetrical or similar,and the SIFT algorithm has better matching performance to the similar or symmetrical image.On the basis of sift and its improved algorithm surf,a new feature point matching algorithm is presented.The experimental results show that the algorithm can match the features of the image with symmetrical or similar structure.(3)Camera calibration technique is to achieve precise positioning of the key.In this paper the three calibration methods are systematically found: Based on the invariance of cross ratio step by step linear calibration method of positioning accuracy and Tsai two steps calibration method and Zhang Zhengyou calibration method is almost the same,but its location to less than the other two.(4)In order to further study the technology of machine vision in the drilling system application,this paper designs a test platform with four degrees of freedom can be completed x,y,Z three directions of translational motion and around Z axis rotation;using F2812 processor as the core design of the control circuit of a motor;with CPLD as the core design a four channel coder decoder circuit.The software design of image processing and the design of DSP control program are completed.The experimental results show that the design is feasible.