纯距离法激光跟踪坐标测量系统的布局与仿真

一般激光跟踪测量系统通过测量距离变化量和跟踪镜转角来确定目标的位置坐标。而纯距离法激光跟踪测量系统只测量距离和距离变化量 ,而不用测量角度量 ,即可进行坐标测量 ,因此可得到较高的测量精度。其系统几何参数可以不借助外界实物标准尺进行自标定 ,并建立虚拟坐标测量参考系。多站测量系统的布局、测量点选择、计算的收敛性与误差等必须进行分析。从激光跟踪测量系统自标定的数学模型出发 ,分析其方程组的雅可比矩阵 ,推导出在自标定时测量系统中各站点和测量点的布局限制 ,并用计算机进行了仿真验证。

The arrangement and simulation of laser tracking system for measuring coordinate with distance-measured-only

In ordinary laser tracking and measuring system, the target coordinates are determined by measuring the variation of distance and the turning angle. In the laser tracking and measuring system with distance measured only, the coordinate measurement can be made only by measuring the distance and variation of distance without measuring the angle, so the measurement precision is high. The geometric parameters of this system may self calibrate without standard ruler, and the reference system for measuring virtual coordinate is set up. Therefore the arrangement of multi station measuring system, the selection of measured points, the convergence and error of the computation, and so on, must be analyzed. The mathematical model of self calibration in laser tracking and measuring system is presented at first. Then the Jacobian matrix of the equations is analyzed. And the restriction on the arrangement of stations and measured points in the measuring system by self calibration is deducted. Finally the conclusion is validated by the computer simulation.