Abstract: In order to explore the distribution pattern of peanut canopy droplet deposition during aerial spraying by UAV, an experiment was designed to investigate the effect of different spraying operation parameters of UAV on the droplet deposition distribution of peanut canopy. The experiment was conducted with DJ T20 multirotor electric UAV, and the fog droplet deposition data was collected with water instead of pesticide spraying, and the image processing software Depositscan was used to analyze the collected watersensitive paper data. The results showed that the droplet deposition distribution trends of all groups of tests were similar, the droplet deposition in the target area was roughly normal distribution, influenced by the ambient wind field, a large number of droplets deposited in the left side of the central route, influenced by the speed and height of the UAV takeoff, the first sampling zone R1 in each area of the droplet deposition effect was better. From the analysis of the uniformity of droplet deposition amount and deposition density, it could be seen that when the flying speed was 2.5 m/s, the spray flow rate was 1.6 L/min, and the flying altitude was 3.5 m, the spray effect was the best, which was the best operation combination. The effects of flight height and flight speed on the droplet deposition volume and droplet deposition uniformity in the target area were significant. This study has very important guiding significance for improving the spraying efficiency of UAV.

Key words: UAV spraying, peanut canopy, operational parameters, droplet deposition, uniformity

摘要： 为探究无人机航空喷施时花生冠层雾滴沉积分布规律，设计无人机不同喷雾作业参数对花生冠层的雾滴沉积分布影响的试验。该试验以DJ T20型多旋翼电动无人机进行作业，以清水代替农药喷施采集雾滴沉积数据，以图像处理软件Depositscan来分析采集来的水敏纸数据。结果表明：各组试验的雾滴沉积分布趋势均相似，在靶区内雾滴沉积大致呈正态分布，受环境风场的影响，大量雾滴在中心航线左侧沉积，受无人机起飞时速度和高度的影响，各区域内第一条采样带R1的雾滴沉积效果较好；从雾滴沉积量、沉积密度均匀性分析可知，当飞行速度为2.5 m/s、喷雾流量为1.6 L/min，飞行高度为3.5 m时，喷雾效果最佳，为最佳作业组合；飞行高度、飞行速度对靶区内雾滴沉积量、雾滴沉积均匀性影响均显著。该研究对提高无人机喷施效率具有十分重要的指导意义。

关键词: 无人机喷雾, 花生冠层, 作业参数, 雾滴沉积, 均匀性