Abstract:Steam generator of the complex work environment risk, construction personnel in the finished wall plate bolts has certain risk introduced a bolt fastening method based on image recognition robot autonomous operation platform mainly includes the robot system and image acquisition system of two parts, with image processing software Halcon, realize the image threshold segmentation based on grey value, circular curve algorithm are used to get the round after, finally get the center of the circle in addition, also shows that the torque and time control method of fastening bolt method at last, through experiments and the test precision of the image recognition and bolt tightening process.The results show that the recognition rate of the positioning algorithm based on threshold segmentation is 100%, the maximum positioning error is 1.10mm, and the minimum error is 0.92mm, which meets the requirements of the autonomous positioning accuracy of the robot bolt.