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利用姿态角传感器、角度编码器结合激光测距传感器,与全站仪构成非接触的组合测量系统,实现大尺度空间中隐藏区域的空间坐标测量。建立了测量系统的数学模型,设计标定靶并对系统进行了标定。针对测量系统,提出一种根据控制点在空间的分布确定权值的加权最小二乘的标定方法。以全站仪直接测量和组合系统测量两种测量方式,对同一空间点进行坐标测量,通过测量对比来验证组合系统的测量精度。实验结果表明:该测量系统可以使得组合测量的量程扩大并保持较高的空间坐标测量精度,采用加权最小二乘算法进行标定的结果使测量误差更小。
Attitude angle sensor and angle encoder combined with laser ranging sensor are used to form a non-contact combined measuring system with the total station to realize the spatial coordinate measurement of the hidden area in large-scale space. The mathematical model of the measurement system is established, the calibration target is designed and the system is calibrated. Aiming at the measurement system, a weighted least square calibration method based on the distribution of control points in space is proposed. The total station direct measurement and combined system measurement of two measurement methods, the same space point coordinate measurement, by measuring the comparison to verify the measurement accuracy of the combined system. The experimental results show that the measurement system can make the range of combined measurement expand and maintain high spatial coordinate measurement accuracy, and the result of weighted least square algorithm calibration makes the measurement error smaller.