海洋工程装备制造现场大尺寸组网测量

发布时间：2018-04-29 02:15

本文选题：激光跟踪仪 + 全局控制网　；参考：《电子测量与仪器学报》2017年03期

【摘要】：为满足海洋工程高端装备的制造与装配过程中对宏观测量大尺寸和局部细节高精度的双重要求,提出了一种构建全局控制网络并优化转站精度的方法。在研究激光跟踪仪测量规律的基础上,对激光跟踪仪测量过程中误差的传递建立了数学模型,并据此来预测跟踪仪在单点测量时的不确定度。试验证明实际测量与仿真数据具有较好的一致性。基于该试验结果,预先为激光跟踪仪测量的全局控制点分配权重,并把权重融入奇异值分解法(SVD)中,求得转站参数。使用均方根法(RMS),与普通SVD法相比较,发现带权重的SVD法具有统计学意义上的优化性。使用转站参数的评价方法分析了转站精度,利用整体最小二乘法,综合考虑两个测站的测量误差,分析出影响转站精度的因子,为后续研究转站精度的提高打下基础。
[Abstract]:In order to meet the double requirements of macroscopical measurement and high precision of local detail in the manufacture and assembly of high-end equipments of marine engineering, a method of constructing global control network and optimizing the precision of transfer station is proposed. On the basis of studying the measuring law of laser tracker, the mathematical model of error transfer in the measurement process of laser tracker is established, and the uncertainty of tracking instrument in single point measurement is predicted. The experimental results show that the measured data are in good agreement with the simulation data. Based on the experimental results, the weights of the global control points measured by the laser tracker are assigned in advance, and the weights are incorporated into the singular value decomposition method (SVD) to obtain the parameters of the transposed station. Compared with the ordinary SVD method, the RMS method with RMS root method shows that the SVD method with weight has statistical significance in optimization. The accuracy of the transfer station is analyzed by using the evaluation method of the parameters of the transfer station. The measuring error of the two stations is considered synthetically by using the integral least square method, and the factors affecting the accuracy of the transfer station are analyzed, which lays a foundation for the further research on the improvement of the accuracy of the transfer station.
【作者单位】：天津大学国家重点实验室;国网河北省电力公司;
【基金】：天津市科技兴海项目(KJXH2014-08)资助
【分类号】：P75

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