摘要
目的利用全站仪对空间物体表面进行观测时,无法在1个测站上进行全部观测时,多测站得到的观测数据需换算到同1个坐标系中。自由设站的各站点观测成果,要通过公共点和计算转换参数,统一到同1个坐标系统中,方便后期的数据处理。方法采用最小二乘原理利用6个转换参数和相邻2个测站上4个公共点的坐标,将2个测站的结果统一到同一个坐标系中。结果通过实地现场对某建筑物前圆柱形物体进行2个测站的数据采集,分别得到2个测站的两套坐标数据,并设置4个公共点,即测站1和测站2需同时观测这4个点的坐标,作为后期坐标转换的公共点,对于采集得到的坐标数据利用该转换算法。结论从设置的公共点转换残差来看,该转换算法完全符合测量精度要求。该系统经完善后可用于大坝、桥梁等大型建筑物的自由设站观测,在不同的测站点上同时采集观测点的数据,将这些采集到的数据经该系统统一转换,可得到整体的观测结果,从而大大节省了传统控制测量的时间,提高了工作效率。
Objective When the total station is used to observe the surface of space objects,it is impossible to observe all of them on one station.The observed data from these Multi-stations need to be converted into the same coordinate system.The observation results of the free-standing stations should be unified into the same coordinate system through common points and calculation of conversion parameters,so as to facilitate later data processing.Methods In this paper,the least square principle was used to unify the results of two stations into the same coordinate system by use of six transformation parameters and coordinates of four common points on two adjacent stations.Results Two sets of coordinate data of two stations were acquired by collection of data of cylindrical objects in front of a building on the spot.Four common points were set up,i.e.coordinates of the four points were observed simultaneously on station 1 and station 2,as common points of coordinate transformation in the later stage.The transformation algorithm was used for coordinate data collected.Conclusion From the set of common point conversion residuals,the conversion algorithm fully meets the measurement accuracy requirements.The system can be used for free observation of large buildings such as dams and bridges.The data of observation points can be collected at different stations at the same time.The overall observation results can be obtained by the unified transformation of the collected data through the system,which greatly saves the time of traditional measurement and improves the work efficiency.
作者
杨丽
YANG Li(Shanghai Urban Constrution Engineering School(Shanghai Landscape School),Shanghai 200232,China)
出处
《河北北方学院学报（自然科学版）》
2019年第9期21-24,共4页
Journal of Hebei North University:Natural Science Edition
关键词
坐标转换
数据拼接
转换残差
改正数
coordinate transformation
data splicing
transformation residual
correction
