The Error Analysis of the Non-orthogonal Total Station Coordinate Measurement System
WU Bin1,DING Wen1,YANG Feng-ting1,XUE Ting2
1. State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China;
2. School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Abstract：According to the Non-orthogonal total station system principle, the main sources of the system measurement error are the rotation angle errors of rotary tables and the distance measurement error of the laser range finder. Using GUM algorithm, the uncertainties of these two sources are estimated and the system measurement uncertainty is evaluated. The result is validated by the simulation on MATLAB and the experiment conducted in the laboratory. The results show that when the distance is constant, the measurement uncertainty is almost independent of the horizontal angle, and increases with the absolute value of the vertical angle. When the angle value is constant, the measurement uncertainty increases with the distance from the measured point and the calibration point on the collimated axis.The accuracy of the simulation results is preliminarily verified by experiments.
2017, Vol. 38 
