大载荷长航时无人机航空应急测绘系统设计与实现

无人机航空摄影是应急测绘保障的重要手段。近年来，大载荷长航时无人机已逐步进入民用领域。以往关于航空应急测绘系统的研究主要是针对轻小型无人机和有人机，缺少适用于大载荷长航时无人机性能和特点的系统设计方法。本文首先分析了不同固定翼无人机产品的性能差异，从无人机平台、任务传感器、遥感数据处理软件等的集成关系入手，提出了基于航测控制器的多载荷一体化集成的设计方案，以及涵盖航摄规划、视频实时处理、影像高精度处理的软件系统集成方案。采用该设计方案研制实现了CH-4航空应急测绘系统，并在四川广元某区域进行了试验，结果表明该系统不仅可以同时获取视频、光学影像和SAR数据，而且数据获取质量能够满足大比例尺测图的要求。

Design and realization of high payload and long endurance UAV based aerial photography system for emergency surveying and mapping

UAV (unmanned aerial vehicle) based aerial photogrammetry is one of the major methods for emergency surveying and mapping. In recent years, a series of UAVs with high payload and long endurance have been applied in civil area. But, former researches on UAV based aerial photogrammetry systems mainly focused on micro/mini UAVs and manned aircraft. These researches are unable to fit with the characters of UAVs with strong capabilities because of the lack of special design methods. In order to solve this problem, this paper analyzes the differences between various types of fixed-wing UAVs, and takes the integration of UAV platforms, mission sensors and remote sensing processing software as the key point of the design of this type of UAV system. Then, an integration method for multiple sensors based on special aerial photography controller is proposed, and the integration process of different software including plan of aerial photography, real-time processing of video and high precision processing of images is introduced. Based on the above methods, an aerial photography system for emergency surveying and mapping based on CH-4 is realized and experimented in Guangyuan Sichuan. The experiment results show that this system can obtain video, optical image and SAR dataset by a single flight, and the quality of datasets can meet the requirements of large-scale surveying and mapping.