基于精密测距的三维坐标基准建立方法及精度研究

Establishment Method and Precision Research of 3D Coordinate Datum Based on Precise Distance Measurement

随着现代工业测量和工程测量的不断发展,目前三维控制网的建立呈现出大范围、高精度的趋势和特点,现有的方法主要是通过测角或者测距建立。利用经纬仪进行精密测角建立三维控制网虽然精度较高,但存在着操作复杂、受人差影响较大、范围较小等不足。随着激光干涉测距技术的发展,测距精度有了飞跃式的提高,本文利用高精度测距值分别进行经典三边网平差和自由设站平差建立三维控制网,通过实验分析两种方法建立控制网的精度并进行对比,实验数据表明,利用自由设站法建立三维坐标基准具有非常高的精度,发挥出了激光干涉测距的高精度优势。

With the continuous development of modern industrial survey and engineering survey,at present of the three-dimensional control network established showing the trend and characteristics of large range,high precision,existing methods is mainly through the measuring angle or distance.The three-dimensional control network is established by using theodolite for precise angle measurement.Although the accuracy is high,there are some problems,such as complex operation,bad influence,small scope and so on.With the development of laser interferometer technology,ranging accuracy has a huge improvement,using high precision ranging values were adjustment and free station adjustment to establish three-dimensional control network of three classical edge network,through the experiment and analysis of two methods to establish the accuracy of the control network and comparing the experimental data show that the station method to establish the 3D coordinates of the base with a very high accuracy by using the free,play the advantages of high-precision laser interferometer.