精密单点定位在背负式移动激光扫描系统中的应用
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摘要
部分利用DGPS技术的移动激光扫描系统的点云数据质量很大程度上受移动轨迹的解算精度影响。针对DGPS必须架设基站的局限性,以背负式移动激光扫描系统为例,使用精密单点定位(precise point positioning, PPP)技术对背负式激光扫描系统的移动轨迹进行解算并进行PPP内符合精度分析。文中通过GPS-RTK分别对PPP与DGPS辅助获取的点云数据精度进行检测,将两种技术获取的点云数据精度进行对比分析。试验结果表明:利用PPP辅助获取点云数据精度与DGPS辅助获取点云数据精度相当,PPP代替DGPS应用于背负式移动激光扫描系统完全是可行的。
The point cloud data quality of some mobile laser scanning systems using DGPS technology is largely affected by the resolution accuracy of the moving trajectory. For the limitation of DGPS, it is necessary to set up the base station. The piggyback mobile laser scanning system is used as an example. Precise point positioning(PPP) technology is used to solve the movement trajectory of the piggyback laser scanning system and the PPP is matched for precision analysis. The accuracy of point cloud data acquired by PPP and DGPS is detected by GPS-RTK respectively. The accuracy of point cloud data obtained by the two techniques is compared and analyzed, and the accuracy of point cloud data acquisition and DGPS assisted acquisition are obtained by PPP. The accuracy of point cloud data is quite equal. It is completely feasible to use PPP instead of DGPS for the piggyback mobile laser scanning system.
The point cloud data quality of some mobile laser scanning systems using DGPS technology is largely affected by the resolution accuracy of the moving trajectory. For the limitation of DGPS, it is necessary to set up the base station. The piggyback mobile laser scanning system is used as an example. Precise point positioning(PPP) technology is used to solve the movement trajectory of the piggyback laser scanning system and the PPP is matched for precision analysis. The accuracy of point cloud data acquired by PPP and DGPS is detected by GPS-RTK respectively. The accuracy of point cloud data obtained by the two techniques is compared and analyzed, and the accuracy of point cloud data acquisition and DGPS assisted acquisition are obtained by PPP. The accuracy of point cloud data is quite equal. It is completely feasible to use PPP instead of DGPS for the piggyback mobile laser scanning system.
引文
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[2] 黄鹤,王柳,姜斌,等.3D SLAM激光影像背包测绘机器人精度验证[J].测绘通报,2016(12):68-73.
[3] 李晨曦,张军,靳欣宇,等.激光雷达SLAM技术及其在无人车中的应用研究进展[J].北京联合大学学报,2017,31(4):61-69.
[4] 宋福成,陈宜金,杨汀,等.矿山近井点测量精密单点定位技术研究[J].煤炭科学技术,2017,45(1):200-204.
[5] 危双丰,刘振彬,赵江洪,等.SLAM室内三维重建技术综述[J].测绘科学,2018,43(7):15-26.
[6] 李晨曦,张军,靳欣宇,等.激光雷达SLAM技术及其在无人车中的应用研究进展[J].北京联合大学学报,2017,31(4):61-69.
[7] 张继海,广伟,袁海波,等.北斗测距信号评估与精密单点定位应用研究[J].仪器仪表学报,2017,38(11):2707-2714
[8] 郑亮,王刊生.稀少控制条件下无人机空三加密及在公路地形测图中的精度分析[J].测绘通报,2017(11):139-143.
[9] 郭文兵,白二虎,陈俊杰.三维激光扫描监测开采沉陷的精度分析[J].煤炭科学技术,2014,42(11):85-89.
[10] 冒爱泉,朱益虎,郝思宝,等.地面三维激光扫描仪精度测评方法和误差改正模型研究[J].测绘通报,2014(2):72-75.
[11] 李夫鹏,张超,李崇辉,等.一种提高精密单点定位实时性的方法[J].测绘工程,2016,25(9):63-67.