绝对定向图形结构对经纬仪测量系统精度的影响

Influence of Absolute Directional Graphic Structure on the Accuracy of Theodolite Measurement System

为了分析经纬仪测量系统绝对定向不同的图形结构对其观测精度的影响,根据现场测量环境给出绝对定向最佳的图形结构,提高测量系统观测精度。本文从经纬仪测量系统原理及精度分析,要获取空间点精密的三维坐标,一定要确定两仪器AB方向和仪器间距离(基准线b);对经纬仪系统绝对定向进行误差分析,得出基线b的精度主要取决于基准尺与两仪器相对位置关系——图形结构[1]。通过模拟基准尺与两仪器的相对位置关系,得出最佳的图形结构,提高测量系统的观测精度,并通过试验加以验证。

In order to analyze the influence of different graphic structures on the observation accuracy of theodolite measuring system,the best graphic structure of absolute orientation is given according to the field measurement environment to improve the observation accuracy of the measuring system.Based on the principle and precision analysis of theodolite measurement system,the direction AB of two instruments and the distance between instruments(reference line B)must be determined in order to obtain the precise 3D coordinates of space points.The error analysis of the absolute orientation of the theodolite system shows that the accuracy of baseline B mainly depends on the relative position relationship between the reference ruler and the two instruments-graphic structure[1].By simulating the relative position relationship between the reference ruler and the two instruments,the best graphic structure is obtained to improve the observation accuracy of the measuring system,and it is verified by experiments.