入射角对VZ-400激光点云测量精度的影响

地面三维激光扫描仪在实际测量工作中,因扫描目标过高,导致激光光束达到截止高度角大小。高入射角将导致激光光斑的变形,使得激光可能落在光班的任何一处,增加了不确定性,损失了点位精度。针对VZ-400扫描仪设计测量方案,通过曲线拟合得到入射角系数与d/h的函数,便于确定监测方案中的最佳扫描距离。

Effects of Incidence Angle on the Accuracy of VZ-400 Scanning Point Cloud Measurement

In the actual measurement of the terrestrial 3 D laser scanner,the laser beam reaches the cut-off angle of incidence because of the high scanning target.High incidence angle will lead to the deformation of laser spot,which makes the laser could fall on any part of the light shift,increases the uncertainty,and loses the accuracy.Aiming at VZ-400 scanner,we designed the measurement scheme,and obtained the functions of incidence angle coefficient and d/h by curve fitting,which was convenient to determine the best scanning distance in the measurement scheme.