工作空间测量定位系统参数模型建立方法  

Method for Establishing Parameter Models in Workshop Measurement and Positioning System

作　　者：郑书彦 林嘉睿[1] 滕明鑫 张饶 邾继贵[1] Zheng Shuyan;Lin Jiarui;Teng Mingxin;Zhang Rao;Zhu Jigui(State Key Laboratory of Precision Measurement Technology and Instruments,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学精密测试技术及仪器全国重点实验室,天津300072

出　　处：《光学学报》2024年第16期171-180,共10页Acta Optica Sinica

基　　金：国家自然科学基金(52127810,51835007)。

摘　　要：针对工作空间测量定位系统扫描光面相较于理想平面存在变形的问题,利用高精度转台对扫描光信号进行细分采样,通过对比旋转激光扫描时间,建立了面型变形信息和仪器原始观测量之间的映射关系,从而准确评估了扫描光面型,并分析了该评估方法的误差影响因素。根据面型评估结果,研究了基于差分进化算法确定最佳分割角度的分区平面模型建立方法,并设计实验对模型拟合效果及测量精度进行了评价。实验结果表明,采用本文方法评价扫描光面型更加准确,新参数模型的拟合效果及测量精度也有明显提升。Objective Large scale measurement plays a pivotal role in the manufacturing and assembly process of substantial equipment such as ships and airplanes.The distributed multi-base station measurement systems,represented by workshop measurement and positioning systems(wMPSs),have been widely used in large-scale measurement due to their characteristics of real-time,multiple objectives and tasks,high precision,and high efficiency.wMPS is made up of numerous transmitters and photoelectric receivers that are spread throughout space,and each transmitter emits two fan-shaped laser beams that rotate and scan the entire space.The model parameters used to fit the spatial surface shape of the scanning light are referred to as internal parameters.The initial observation of the instrument refers to how long it takes for the scanning light to reach the photoelectric receiver.By converting the scanning time into spatial azimuth,single station scanning angle measurement can be accomplished.Furthermore,employing an internal parameter model facilitates the achievement of multi-station spatial rendezvous,enabling the calculation of three-dimensional coordinates.The accurate description of the scanning light spatial surface by the internal reference model is crucial for ensuring the measurement precision of the instrument.The scanning laser used in wMPS disperses the point light source emitted by the semiconductor laser into a linear laser through a cylindrical mirror,thereby forming a light plane in space.Previous research has shown that optical non-uniformity,geometric errors,and assembly errors of cylindrical mirrors in lasers can induce small deformations of the optical surface in various shapes and directions when deviating from the ideal plane within large spatial domains.Therefore,the spatial surface depicted by the traditional in-plane parametric model,which assumes the scanning light surface to be an ideal plane,may not fully correspond to the actual surface,leading to systematic errors in the measurement outcomes.During the l

关 键 词：测量 工作空间测量定位系统 大尺寸测量 参数模型 差分进化算法 

分 类 号：TH74[机械工程—光学工程]