摘要
为研究多旋翼植保无人机低空喷施作业过程中,水稻垂直方向雾滴沉积的分布规律,在水稻冠层叶片、中部叶片、底部叶片分别放置了雾滴测试卡,收集植保无人机喷洒过程中的雾滴信息。使用清水代替农药来模拟喷施过程,利用雾滴沉积分析软件i DAS分析雾滴测试卡,得出植保无人机雾滴在水稻垂直方向的分布结果。试验结果表明:植保无人机低空喷雾在水稻垂直方向的雾滴覆盖率存在显著差异,有效喷幅内旋翼下方区域的雾滴覆盖效果最好,而远离旋翼的位置,雾滴覆盖率较差。从水稻垂直方向的不同位置分析,雾滴总体覆盖率为冠层54.86%,中部32.69%,底部24.7%;水稻垂直各位置的粒径分布中,平均粒径范围处于110~140μm之间,粒径大小适合植物病虫的防治。冠层的点密度最大,而水稻中间部位和水稻底部的点密度分布较为相似;水稻中部雾滴扩散比(0.465)优于冠层(0.38)和底部(0.31),整体喷雾的雾滴扩散比与相对粒谱宽度的数值均低于正常值(0.67)。
In order to study the vertical distribution of spray droplet deposition of plant protection multi rotor UAV in low altitude spraying operation process, droplet test card were placed in rice canopy leaves, middle leaves and bottom leaves to collect protection UAV spray droplet. Water was used instead of pesticide in spraying process simulation, and iDAS analysis software was used to analyze the droplet deposition on the test card and the distribution of spray droplet deposition at different positions. The results showed that the spray droplet coverage rate of low altitude UAV in vertical direction was significantly different, the droplet coverage effect in the effective range and below rotor was the best, and the droplet coverage effect away from the rotor was poor. From different positions of rice canopy, overall droplet coverage rate in canopy was 54. 86% , in middle canopy was 32.69% , and in bottom canopy was 24.7%. The particle size distribution in the vertical position of rice was in the range of 110 - 140 μm, and the particle size was suitable for the prevention and control of plant diseases and insect pests. The density of the canopy was the highest, while the density distribution of the middle part and the bottom of rice was similar. The central rice droplet diffusion ratio （0. 465） was better than those of the canopy （0.38） and bottom （0. 31 ） , the overall spray width and relative numerical diffusion of particle spectrum were lower than the normal value （0.67）.
作者
许童羽
于丰华
曹英丽
杜文
马明洋
XU Tongyu YU Fenghua CAO Yingli DU Wen MA Mingyang(College of Information and Electrical Engineering, Shenyang Agricultural University, Shenyang 110866, China Liaoning Engineering Research Center for Information Technology in Agriculture, Shenyang 110866, China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2017年第10期101-107,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家重点研发计划项目(2016YFD020060307)
辽宁省教育厅重点项目(LSNZD201605)
关键词
植保无人机
雾滴沉积
粳稻
plant protection UAV
deposition of droplets
japonica rice
