基于PPK的无人机航测技术在水电工程中的应用

Application of UAV Aerial Photogrammetry Technology Based on PPK in Hydropower Engineering

以某水力发电工程项目为例,进行了无人机航测生产4D产品的实验,并通过对4D产品的相关技术指标进行了严格的误差分析与精度分析,验证了利用高精度后差分GNSS/IMU技术(PPK)获取差分POS,在布设的地面像控点更为稀少条件下,可以生产出符合规范要求的4D产品,大大提高了产品制作效率、降低了外业从业人员的劳动强度,缩短了项目工程周期。

Taking a hydropower station project as an example,experiments were conducted on UAV 4D aerial photogrammetry products,the production of 4D aerial photogrammetry products of UAVs was completed,and the relevant technical indicators were analyzed strictly with respect to error analysis and accuracy,and it was proved that the differential POS was obtained by using the high-precision post-differential GNSS/IMU technology(PPK).Under the condition of more sparse ground image control points,aerial photogrammetry 4D products that meet the specifications can be produced,thereby improving work efficiency,greatly reducing the labor intensity of operators,and shortening the project cycle.