多边法坐标测量系统中解算方式对测量精度的影响研究

Study on the Influence of the Calculation Method on the Accuracy of the Multilateral Coordinate Measurement System

为了研究多边法坐标测量系统中解算方式对测量精度的影响,建立了多边法坐标测量模型,分析了两种目标点坐标解算方式的差异,并针对典型的4台测站多边法坐标测量系统进行了两种解算方式的仿真测量实验。仿真结果表明:预先准确标定系统参数方式能有效提升测量精度,测量精度依次改善了69.5%、64.6%、46.3%。进行了坐标测量精度验证实验,实验结果表明:与同步解算方式相比较,预先准确标定系统参数取模后的3组实验平均测量误差由203.0μm降至23.8μm,且3组实验的测量误差与测量距离的平均相关系数由99.8%降至37.8%,验证了仿真实验结果。

In order to study the influence of the calculation method on the accuracy of the multilateral coordinate measurement system,the multilateral coordinate measurement model was established,and the differences between the two methods of coordinate calculation were analyzed.The simulation experiment of the two methods was carried out for the typical multilateral coordinate measurement system of four stations.The simulation results show that the pre-accurate calibration of system parameters can effectively improve the measurement accuracy,which is improved by 69.5%,64.6% and 46.3% respectively.An experiment was conducted to verify the accuracy of coordinate measurement.The experimental results show that,compared with the synchronous calculation method,the average measurement error of the three groups of experiments after the pre-accurate calibration of system parameters decrease from 203.0μm to 23.8μm,and the average correlation coefficient between the measurement error and the measurement distance of the three groups of experiments is reduced from 99.8% to 37.8%,which verify the simulation results.