对自主研制的激光跟踪仪的精度评定进行研究，以期解决大尺寸空间坐标测量系统的空间坐标精度难于评定的问题。 考虑现场环境条件、仪器状态和操作者技能等因素对测量精度影响都很大，提出了基于光束平差原理对激光跟踪仪系统进行精度评定的方法。通过Matlab软件对激光跟踪仪的精度评定进行了仿真，仿真结果显示光束平差法能客观地反映激光跟踪仪的测量精度。另外，使用Faro生产的激光跟踪仪进行了实物实验，实验结果显示其水平角精度σH为1.97″，垂直角精度σV为2.61″，测距精度σD为3.75×10-6，对比Faro生产的激光跟踪仪精度(σH=2.0″；σV=2.0″；σD=4 μm)可证明采用光束平差法评定自主研发的激光跟踪仪测量精度是正确、可行的。该方法为探索激光跟踪仪新的应用技术、开展面向对象的测量不确定评定奠定了基础。

The accuracy evaluation methods for a laser tracker developed by ourselves are investigated to solve the problem that the coordinate precision in a large-size space coordinate measuring system is difficult to be evaluated. In consideration of the great impacts of environmental conditions, equipment status, operator skills and other factors on measurement accuracy, this paper proposes a bundle adjustment method to evaluate the accuracy of the laser tracker under practical conditions. The Matlab is used to simulate the accuracy evaluation, and results show that the bundle adjustment can generally reflect the measurement accuracy of laser tracker measurement system . Furthermore, a practical experiment is performed on a laser tracker made from Faro company, and results show that the measuring accuracies of horizontal angle σH and vertical angle σV are 1.97″ and 2.61″,respectively, and measuring accuracy σD for the distance is 3.75×10-6.As compared with the instrument accuracy of the Faro (σH=2.0″,σV=2.0″,σD=4 μm), It proves that using bundle adjustment to evaluate the performance of the laser tracker developed is feasibility and correctness. The method will be useful to broaden application of laser tracker technology and to open a way to task-oriented uncertainty evaluation.