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工作空间测量定位系统是一种基于激光扫描的三维坐标大尺寸分布式测量系统,目前已广泛应用于大尺寸测量领域。该系统可以通过增加发射站数目来扩展量程同时精度并不损失,其前提是有一套精确的全局定向参数。在系统多平面约束的数学模型基础上,阐述了一种基于三维控制场的w MPS全局组网定向方法。在标定空间内设置点位坐标已知的控制点组成控制场,给出了组网定向的模型及优化方法,并给出迭代初值生成方法。实验表明:通过基于控制场全局组网定向方法后,系统与激光跟踪仪对比后点位误差优于0.15 mm,在提高效率的同时大大提高了系统的精度。
Work space measurement and positioning system is a large-scale distributed measurement system based on laser scanning and three-dimensional coordinates. It has been widely used in the field of large-size measurement. The system can expand the range by increasing the number of transmitting stations without loss of accuracy, provided that there is a precise set of global orientation parameters. Based on the mathematical model of multi-plane constraints, a global w MPS network orientation method based on three-dimensional control field is presented. In the calibration space, set the control point with known coordinates as the control field, and give the model and the optimization method of network orientation, and give the generation method of iterative initial value. Experiments show that the point error is better than 0.15 mm after the system is compared with the laser tracker based on the global network orientation method based on the control field, which greatly improves the system accuracy while improving the efficiency.