光电测距中间法三角高程测量的试验研究

Experimental Study of Trigonometrical Levelling Measurement with Electro-Optical Distance Method

本文概述了光电测距(EDM)中间法三角高程测量的主要公式与误差分析.讨论了全站型电子经纬仪(如WILD T2000)施测所能达到的精度;对国内外的研究成果作了简述;列举了作者的旨在代替精密水准测量的试验分析.根据试验结果,如果限制每站的距离在500m的范围以内,所得高差可望达到二等水准测量的精度.这对丘陵地区、山区的水利水电工程建设来说有一定的实用价值.

This paper describes briefly the main formulas of EDM (Electro-Optical Distance Measurement) trigonometrieal levelling and analys it's error. The observation precision by using informaties theodolite WILD T2000 is discussed. The observation station is placed between two staff stations. A summary of the research achievements made both in China and abroad is also given. This paper also presents the authors' experiments and some analysis for replacing high-precision levelling. According to the experimental methods and results, if the sight distance is within 500m, the precision of the second order levelling can be reached. This will be of practical value to hydro-pwoer plant construction in hilly areas.