摘要
在地形复杂的偏远地区开展测量工作时,常会遇到常规测量仪器架设困难、信号缺失等问题,故提出一种Post Processed Kinematic(PPK)模式下的无人机航测方法。结合四川省某火车站改建前期勘测项目,以DJI Phantom 4 RTK多旋翼无人机为搭载工具,分析基于PPK得到的POS辅助空三加密,PPK无人机作业中相对航高设置、像片重叠度设置以及像控点布设等影响航测精度的技术关键,探究PPK无人机作业模式下基站与流动站之间的基线长与最终三维模型精度之间的关系。研究表明,设置3组距离测区分别为1.76 km、7.04 km和12.75 km的基准站,分别解算POS,空三加密以及生产三维模型,并对其生产的三维模型进行精度评定,平面中误差分别为0.027 m、0.030 m、0.054 m,高程中误差分别为0.047 m、0.061 m、0.113 m。
In terms of the difficulty of railway survey by conventional measurement and the disconnection of data link with complex terrain,this paper discussed the application of UAV aerial survey based on Post Processed Kinematic(PPK)mode.This paper combined real cases and used the DJI Phantom 4 RTK as a research tool to analyze the aerial triangulation based on PPK,the relative altitude setting,the photo overlap setting and the image control point layout and other technical keys that affect the accuracy of aerial surveys were considered.In order to explore the relationship between the baseline length between the base station and the rover and the accuracy of the final 3D model in the PPK UAV operation mode,this paper set up three sets of reference stations with a distance of 1.76 km,7.04 km and 12.75 km from the survey area respectively.Then POS,made Aerial triangulation,and producing 3D models,and evaluated the accuracy of the 3D models were calculated.In this case,the errors in the plane are 0.027 m,0.030 m,and 0.054 m,and the errors in the elevation are 0.047 m,0.061 m,0.113 m respectively.
作者
宋益桥
郭刚
陈红兵
Song Yiqiao;Guo Gang;Chen Hongbing(China Railway ErYuan Engineering Group Co.,Ltd.,Chengdu 610031,China)
出处
《铁道勘察》
2022年第5期28-30,36,共4页
Railway Investigation and Surveying
关键词
无人机
PPK
车站改造
三维模型
航测精度
UAV
PPK
the station reconstruction
3d model
arial survey accuracy
作者简介
宋益桥(1985—),男,2008年毕业于西南科技大学测绘工程专业,工学学士,工程师,E-mail:281044481@qq.com。
