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由于测距原理不同,相位式地面三维激光扫描仪相较于脉冲式具有测量精度高、测程短的特点。文中以Z+F IMAGER 5010C相位式地面三维激光扫描仪为试验对象,从距离入手,对其内、外符合精度进行了计算分析,并研究了此扫描仪用于变形监测的适用条件。结果表明:Z+F IMAGER 5010C扫描仪的测量精度随着距离的增加而降低;内符合精度要优于外符合精度;内符合精度分析结果表明,在设置靶标用于扫描数据配准的作业方式下同时开展高程、水平方向的监测,扫描仪距离扫描对象控制在30 m之内,可进行三级变形监测;外符合精度分析结果表明,借助全站仪测量靶标中心点坐标用于扫描数据配准的作业方式下同时开展高程、水平方向的监测,扫描仪距离扫描对象的距离控制在20 m之内,亦可进行三级变形监测。
Due to the different ranging principle, the phase terrestrial 3D laser scanner has the characteristics of high measurement precision and short range compared with the pulse type. In this paper, the Z + F IMAGER 5010C phase type ground 3D laser scanner was used as the test object, and its internal and external coincidence accuracy was calculated from the distance, and the applicable conditions of the scanner for deformation monitoring were studied. The results show that: the accuracy of the Z + F IMAGER 5010C scanner decreases with the increase of the distance; the accuracy of the internal coincidence is better than that of the external coincidence; the accuracy of the internal coincidence analysis shows that when setting the target for the scan data registration Under the same time to carry out elevation, horizontal direction of the monitoring, the distance between the object under scanning scanner control within 30 m, can be three levels of deformation monitoring; external meet the accuracy of the results show that the total station with the coordinates of the target center for scanning data with Under the quasi-operation mode, the elevation and the horizontal direction are monitored at the same time. The distance between the scanner and the object to be scanned is controlled within 20 m, and the three-level deformation monitoring can also be performed.