利用重心基准的激光跟踪三维测边网平差  

Adjustment of 3-D laser tracking network based on barycenter datum

作　　者：刘硕[1] 刘光博 刘尚国[1] LIU Shuo;LIU Guangbo;LIU Shangguo(College of Geodesy and Geomatics, Shandong University of Science & Technology, Qingdao, Shandong 266590, China;General Technology Group Engineering Design Co. Ltd, Jinan, Shandong 250031, China)

机构地区：[1]山东科技大学测绘与空间信息学院,山东青岛266590 [2]通用技术集团工程设计有限公司,山东济南250031

出　　处：《山东科技大学学报（自然科学版）》2021年第6期20-27,共8页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：通用技术集团工程设计有限公司研发项目(RD80)。

摘　　要：针对激光跟踪三维测边网平差中起算数据不足引起的秩亏问题,引入重心基准约束条件进行参数求解。以Leica AT930型激光跟踪仪为例,在试验场内构建了高精度三维测边网,利用公共点转换模型求取各测站点的近似坐标。然后利用重心基准理论,引入附加约束矩阵,较好地解决了测边网中秩亏自由网平差的问题。实验表明,该模型在10 m测量范围内,测站点、控制点点位精度平均值优于0.1 mm,平差后点坐标反算距离与测距值偏差可控制在10μm以内,有效消除了激光跟踪仪测角误差对点位精度的影响。In order to solve the problem caused by insufficient initial data in the adjustment of laser tracking three-dimensional edge measuring network,the constraint condition of barycenter datum is introduced to solve the parameters.Taking Leica AT930 laser tracker as an example,a high-precision three-dimensional edge measuring network is constructed in the test site,and the approximate coordinates of each measuring station are obtained by using the common point transformation model.Then,by using barycenter datum theory and introducing additional constraint matrix,the problem of rank deficient free network adjustment is solved.The experimental results show that the average precision of measuring station and control point is better than 0.1 mm in the range of 10 m,and the deviation between back calculation distance and distance measurement value can be controlled within 10μm after adjustment.The influence of the angle measurement error of the laser tracker on the point accuracy is effectively eliminated.

关 键 词：激光跟踪仪 精密三维测边网 公共点转换模型 重心基准 秩亏自由网平差 

分 类 号：P258[天文地球—测绘科学与技术]