大疆精灵PHANTOM 4 RTK无人机在铁路勘测中的应用

Practical Application of Phantom 4 RTK in Railway Survey

为了解决铁路勘测中特殊地段测量难的问题,比如悬崖峭壁、滑坡地带、采石场、采空区、高速公路、既有铁路等人员不易或不能到达的地方。采用无人机免像控航测技术,实现空对地目标远距离非接触测量。通过室内规划航线,动态RTK获取校正参数,100 m高的低空航拍,80%的航带重叠加倾斜飞行,大疆智图软件制作倾斜模型,南方CASS软件裸眼3D画图,可以取得满足测量规范要求精度的1∶500地形图。从长沙至赣州铁路定测二十多个代表工点的使用效果看,平面中误差为2.1 cm,高程中误差为2.9 cm,精度满足规范要求。充分说明无人机免像控航测技术制作1∶500地形图方案可行,无人机免像控航测技术的应用,大大节省了人力资源投入,提高了作业效率,降低了作业风险,具有较强的工程适用性及经济性。

In order to solve the problem of difficult measurement in special sections in railway survey,such as cliffs,landslide areas,quarries,goaf,expressways,existing railways and other places that are inaccessible to personnel,UAV image free aerial survey technology is adopted to realize long-distance non-contact measurement of air to ground targets.To obtain the 1∶500 topographic map which meets the accuracy requirements,the following steps have to be adopted:indoor route planning,dynamic RTK to obtain correction parameters,100m low altitude aerial photography,80%overlap strip and tilt flight,Dajiang intelligent map software to make tilt model,and South CASS software to draw naked eye 3D map.Though the applications of more than 20 representative work sites in the location survey of Changsha Ganzhou railway,it shows that the mean square error of plane is 2.1cm and the mean square error of elevation is 2.9cm,which meets the specification accuracy requirements.It fully shows that the scheme of making 1∶500 topographic map by UAV image free aerial survey technology is feasible.The application of UAV image free aerial survey technology greatly reduces the required human resources,improves the operation efficiency,reduces the operation risk,and has an abroad industrial application with low cost.