经纬仪测量系统尺度基准测定及误差分析  

Determination and error analysis of length-scale datum for theodolite measuring system

作　　者：刘尚国[1,2] 于胜文[1,2] 王喜芹[1] 郑文华[1] 

机构地区：[1]山东科技大学山东省基础地理信息与数字化技术重点实验室,山东青岛266590 [2]海岛(礁)测绘技术国家测绘地理信息局重点实验室,山东青岛266590

出　　处：《测绘科学》2015年第11期127-130,共4页Science of Surveying and Mapping

基　　金：海岛(礁)测绘技术国家测绘地理信息局重点实验室资助项目(2011B09)

摘　　要：针对经纬仪测量系统缺少距离观测值而难以构建其尺度基准的问题,该文分别基于相似原理和垂直角视距法,阐述了通过交会测量已知长度的基准尺构建尺度基准的原理与方法;依据误差传播定律,分析指出水平基线中误差是衡量尺度基准精度的重要数字指标,而基准尺摆放位置与姿态、基准尺长度和水平基线长度等构形要素对尺度基准误差影响较大;最后基于Matlab GUI编制了水平基线中误差仿真计算程序,定量分析了各类构形要素对水平基线中误差的影响规律,归纳总结出提高尺度基准测定精度、优化系统测量空间构形的若干措施。Aiming at the problem that it is difficult for the theodolite measuring system to determinate its length-scale datum due to lack of distance observation value,the paper elaborated the method of length-scale datum determination calculated from intersection measurement of a known-length scale bar based on similar principles and vertical angle tachymetry firstly;and then according to the law of propagation of error,it was pointed out that the mean square error of level baseline is an important index to measure the precision of the length-scale datum,moreover,some configuration factors,including scale bar placed attitude,length of baseline and length of scale bar and so on,were considered as major error resources of length-scale datum.Finally,based on Matlab GUI simulated calculation,the influence law of many factors on the mean square error of level baseline was analyzed,and some methods of improving the measure accuracy of length-scale datum and optimizing the measure spatial configuration were summarized.

关 键 词：经纬仪测量系统 工业测量 尺度基准 空间前方交会 误差仿真 

分 类 号：P241.1[天文地球—测绘科学与技术]