植保无人飞机作业参数对田外除草靶标区内外雾滴沉积规律的影响

雾滴大小、气象条件和施药装备的作业参数对雾滴的覆盖范围、靶标的吸附性能有影响。无人飞机(UAV)是目前有助于高效喷雾的现代施药技术装备。然而作业参数对靶标区和脱靶区的影响依然尚待确定。开展了田间试验并运用沉积扫描软件测定了在田外除草中不同飞行高度(2 m和3 m)和飞行速度(2 m/s和3 m/s)下雾滴的沉积量、覆盖密度、覆盖率和雾滴直径。结果表明,当无人飞机在处理T_1中以2 m/s速度、2 m高度飞行时,靶标区域平均沉积量最高,为2.29μL/cm~2,飞行航线中央0点位置的覆盖率达到36.19%。处理T_1、T_2、T_3和T_4在飞行航线中央的雾滴谱相对宽度分别为0.70、1.01、1.03、1.05。处理T_1体积中值直径(VMD,也即D_(v0.5))最大,为448.75μm;而处理T_4的D_(v0.5)最小,为238.95μm。单旋翼无人飞机在脱靶区的沉积量几乎可以忽略不计。本研究为无人飞机运营商、农民和生产企业提供了参考,从而优化航空植保技术在除草上的应用。

Effect of operational parameters of UAV sprayer on spray deposition patternin target and off target zones during outer field weed control application (Cai Chen Translator)

Droplet size, weather conditions and operational parameters of sprayers also affect the spray coverage, absorption attachment to the target. Unmanned aerial vehicles (UAVs) currently, is considered a modern spraying technology which is helpful for efficient spraying. However, the effect of operational parameters on deposition intarget and off target zones still required to determine. Field tests were conducted to determine spray deposition,the number of spray deposits, coverage and droplet size under various flight heights (2 and 3 m) and flight speed (2 and 3 m/s) for control of outer field control. Deposit Scan software was applied to determine the spray deposition, number of deposits, coverage and droplet diameter. The results showed that the average deposition(2.29 μL/cm2) in the target area was found the highest when the UAV operates with 2 m/s forward speed at 2 m height (T1), the spray coverage under the T1 treatment achieved 36.19% at zero position of the central flight line.At the flight central line, the relative span was 0.70, 1.01, 1.03 and 1.05 for treatments T1, T2, T3 and T4 respectively. The treatment T1 showed maximum VMD=Dv0.5 as 448.75 μm whereas T4 showed minimum Dv0.5with a value of 238.95 μm. The deposition in the off target zone was nearly negligible for single rotor UAV. This study provides a recommendation UAV operators, farmers and manufacturers for better utilization of this modern technology for weed control.