DESIGN AND EXPERIMENT OF AN AERIAL ELECTROSTATIC SPRAYING SYSTEM FOR UNMANNED AGRICULTURAL AIRCRAFT SYSTEMS

文献类型： 外文期刊

第一作者： Wang, S.

作者： Wang, S.;Li, X.;Zhou, H.;Lv, X.;Shen, W.

作者机构：

关键词： Chemical application; Droplet spectrum; Deposition; Specific charge; Unmanned agricultural aircraft system

期刊名称：APPLIED ENGINEERING IN AGRICULTURE （ 影响因子：0.985； 五年影响因子：1.02 ）

ISSN： 0883-8542

年卷期： 2020 年 36 卷 6 期

页码：

收录情况： SCI

摘要： Chemical application by unmanned agricultural aircraft systems (UAASs) has developed rapidly in China and other Asian countries due to their suitability to complex terrains, high working efficiency, and labor intensity reduction. To enhance spraying performance of unmanned aerial spraying systems (UASSs), an aerial elecfrostatic spraying system (AESS) was designed consisting of a lithium battery, electrostatic generator, positive and negative charging electrodes, tanks, pumps, and centrifugal atomizers. The AESS elecfrostatic voltage (EV) was adjusted from 15 to 35 kV, the atomizer rotation speed reached 9600 r/min, and the pump pressure ranged from 0.02 to 0.1 MPa. The AESS specific charge and droplet spectrum under water spraying was measured at different EVs. Results showed that the specific charge due to the negative electrostatic electrode was higher than that due to the positive electrostatic elecfrode. At a negative elecfrostatic elecfrode EV of 35 kV, its specific charge was 1.84 mC/kg. The negative and positive elecfrostatic elecfrode volume median diameters (VMDs) ranged from 81.39 to 84.04 mu m and 86.8 to 88.80 mu m, respectively, and no significant droplet size and relative span differences occurred between the different EVs for the same elecfrostatic electrode. The AESS was installed on single-rotor and multirotor UAASs for chemical application to pear frees. The results revealed that the electrostatic spray from the AESS has no effect on droplet deposition on the upper side of pear free canopy leaves, while charged droplets can produce a wrap-around effect on the underside of the leaves, which promotes the adhesion of droplets on the underside of the leaves. The AESS is suitable for chemical application under aerial UAAS spraying.

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