Abstract：In order to realize coordinate tracking and measuring in large size range, a small laser tracking and measuring system with small volume and light weight is developed. The mechanical structure of opto-mechatronics is designed. The optical module, mechanical structure and electronic control module are integrated to reduce the volume of the system and improve the anti-interference ability. The optical module of the system is designed, and the maximum allowable deviation of the target is increased by optimizing the optical path of the acquisition part of the target deviation based on the position sensitive detector. Through the calibration experiment of position sensitive detector, the linear interval and deviation ratio coefficient of position sensitive detector are measured, which provides key parameters for the development of tracking control algorithm. The tracking control module is designed, and the tracking control algorithm is developed to realize the fast tracking measurement of the system. The 3D visual measurement software of the system is developed to realize the real-time control of the spatial position and motion state of the system and the target. The experimental results show that the tracking stability and displacement resolution of the system are 20μm and 40μm respectively, the tracking speed of the system can reach up to 480mm/s, the acceleration can reach up to 506mm/s2, the tracking range is no less than 70m, and the system has 3D coordinate measurement and 3D visualization functions. At the same time, compared with the existing tracker, it has the advantages in volume, weight and angle measurement range, and has good tracking performance and application prospects.
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2024, Vol. 45 
