三维激光扫描作业中测量精度影响因素及控制措施

The Influencing Factors and Control Measures of Measurement Accuracy in 3D Laser Scanning Operation

分析三维激光扫描作业中测量精度影响因素及控制措施,有助于提升测量质量,对测量结果合理化与规范化有重要意义。以检校场为例,采用中海达HS-650扫描仪进行了实地测量,讨论了其内外符合精度,并从扫描目标不等高、扫描距离、点云密度等方面分析了扫描仪对测量结果精度的影响。结果表明:扫描目标不等高不影响测量结果精度;目标物的扫描距离与点云密度和测量精度成正相关。在此基础上,联系实际应用案例进一步讨论了三维激光扫描精度控制措施,验证了三维激光扫描技术在煤矿区变形监测的实用性与可行性。

Analyzing the influencing factors and control measures of measurement accuracy in three-dimensional laser scanning operation is helpful to improve the measurement quality and is of great signifi-cance to the rationalization and standardization of measurement results.Taking the calibration field as an ex-ample,the Zhonghaida HS-650 scanner was used for field measurement,and its internal and external coin-cidence accuracy was discussed.The influence of the scanner on the accuracy of the measurement results was analyzed from the aspects of unequal height of the scanning target,scanning distance and point cloud density.The results show that the unequal height of the scanning target does not affect the accuracy of the measurement results,the scanning distance of the target is positively correlated with the point cloud density and measurement accuracy.On this basis,the accuracy control measures of 3D laser scanning are further dis-cussed in combination with practical application cases,and the practicability and feasibility of 3D laser scanning technology in deformation monitoring of coal mine areas are verified.