Research on the Application of Calibration Scheme for Laser Tracker T-scan Scanning System

Abstract The laser tracker scanning measurement system has the characteristics of portability, non-contact, high precision, and fast scanning speed, and is widely used in the aerospace industry. Due to the inevitable bumps and vibrations during the transportation process of laser trackers in different locations, as well as the frequent measurement and transfer movements during use, the system structure of the T-scan scanning probe may deviate, resulting in a decrease in the point cloud scanning accuracy of the scanning system. The laser tracker ball target measurement system will be regularly evaluated by a professional organization and issued a certificate of qualification, but there is no evaluation procedure for the laser tracker scanning system, and it can only be calibrated by sending it to the manufacturer. For laser tracker scanning systems that work in remote locations for a long time, it is more likely to experience out of tolerance phenomena, but it is difficult to calibrate them back to the manufacturer and the cycle is long, which affects the progress of the project. A method for error determination and scanning calibration of laser tracker T-scan scanning system is proposed to address this issue. Through experimental verification, the calibration results are compared with the measurement results of laser tracker ball target contact and contact type coordinate measuring equipment, and the effect is good. After on-site testing and application, the scanning accuracy has been significantly improved, and it has high engineering application value.