Development of a charge transfer space loop to improve adsorption performance in aerial electrostatic spray

Zhao, Denan; Lan, Yubin; Wang, Shizhou; Dixit, Abhishek

doi:10.25165/j.ijabe.20201305.5531

Cited by 4 publications

(6 citation statements)

References 10 publications

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“…The inductive charging voltage is usually between 2 kV and 15 kV, and the electrode making and insulation methods are easy to be realized, which is the most developed method of charging droplets at present [47]. In addition, contact charging has also been tried in China, which has also achieved good results [34][35][36]41,45]. However, it needs to keep the absolute insulation of the spray system in the charging process, which puts forward high requirements for the design method and safety.…”

Section: Discussionmentioning

confidence: 99%

“…Through field spraying experiments, as shown in Figure 3, it was found that the flight height is an important factor affecting the deposition amount and the horizontal deposition uniformity but has little effect on the vertical deposition uniformity. Zhao et al [36] proposed a method of charging the liquid in two isolated water tanks with positive and negative charges respectively by a high-voltage electrostatic generator based on the contact charge mode to solve the problem of insufficient adsorption rate of droplets on the target back when using an aerial electrostatic spray. Aerial electrostatic spraying test stand and UAV electrostatic spray system were designed, which proved that it was feasible to develop a charge transfer loop in space to improve the adsorption performance of droplets.…”

Section: Continuous Optimization Of Uav-based Electrostatic Spray Tec...mentioning

confidence: 99%

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Development and Prospect of UAV-Based Aerial Electrostatic Spray Technology in China

et al. 2021

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Aerial electrostatic spray technology for agriculture is the integration of precision agricultural aviation and electrostatic spray technology. It is one of the research topics that have been paid close attention to by scholars in the field of agricultural aviation. This study summarizes the development of airborne electrostatic spray technology for agricultural use in China, including the early research and exploration of Chinese institutions and researchers in the aspects of nozzle structure design optimization and theoretical simulation. The research progress of UAV-based aerial electrostatic spray technology for agricultural use in China was expounded from the aspects of nozzle modification, technical feasibility study, influencing mechanism of various factors, and field efficiency tests. According to the current development of agricultural UAVs and the characteristics of the farmland environment in China, the UAV-based aerial electrostatic spray technology, which carries the airborne electrostatic spray system on the plant protection UAVs, has a wide potential in the future. At present, the application of UAV-based aerial electrostatic spray technology has yet to be further improved due to several factors, such as the optimization of the test technology for charged droplets, the impact of UAV rotor wind field, comparison study on charging modes, and the lack of technical accumulation in the research of aerial electrostatic spray technology. With the continuous improvement of the research system of agricultural aviation electrostatic spray technology, UAV-based electrostatic spray technology will give play to the advantages in increasing the droplets deposition on the target and reducing environmental pollution from the application of pesticides. This study is capable of providing a reference for the development of the UAV-based agricultural electrostatic spray technology and the spray equipment.

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Section: Discussionmentioning

confidence: 99%

Section: Continuous Optimization Of Uav-based Electrostatic Spray Tec...mentioning

confidence: 99%

Development and Prospect of UAV-Based Aerial Electrostatic Spray Technology in China

et al. 2021

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“…Compared with a non-electrostatic spray, electrostatic spray increased droplet deposition by 0.0143 μg/cm 2 . Zhao et al (2020) proposed a high-voltage electrostatic generator, which is positively and negatively charged for the liquid in two isolated water tanks. A charge transfer circuit was developed in the space between the airborne electrostatic spray system and the ground.…”

Section: Techniques For Improving the Deposition Effectmentioning

confidence: 99%

Research on Methods Decreasing Pesticide Waste Based on Plant Protection Unmanned Aerial Vehicles: A Review

Kaizu

Huang

et al. 2022

Front. Plant Sci.

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In plant protection, the increasing maturity of unmanned aerial vehicle (UAV) technology has greatly increased efficiency. UAVs can adapt to multiple terrains and do not require specific take-off platforms. They do well, especially in farmland areas with rugged terrain. However, due to the complex flow field at the bottom of a UAV, some of the droplets will not reach the surface of a plant, which causes pesticide waste and environmental pollution. Droplet deposition is a good indicator of the utilization rate of pesticides; therefore, this review describes recent studies on droplet deposition for further method improvement. First, this review introduces the flight altitude, speed, and environmental factors that affect pesticide utilization efficiency and then summarizes methods to improve pesticide utilization efficiency from three aspects: nozzles, electrostatic sprays, and variable spray systems. We also point out the possible direction of algorithm development for a UAV’s precision spray.

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“…Driven by the widespread adoption of agricultural UAVs, researchers have undertaken extensive efforts to optimize the structure and parameters of these UAV spray systems to enhance their applicability [20][21][22]. UAV electrostatic spraying technology is a lowaltitude, low-volume method for plant protection [5,23].…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of a Contact-Charging Electrostatic Spray UAV System

Zhao,

Cooper,

Chima

et al. 2024

Agriculture

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Utilizing agricultural UAVs for pesticide and insecticide spraying is an effective measure for plant protection. However, achieving effective coverage on the back side of target is often challenging. To address this issue, this study combined a contact-charging spraying system with a UAV to develop an electrostatic plant protection UAV system. Upon activating the electrostatic component, strong electrostatic effects were observed at the nozzle, altering the distribution of the liquid flow; the distribution within the liquid flow became more homogeneous, while the edge regions experienced electrostatic repulsion, leading to changes in droplet size and an increase in droplet density. In the central area, droplet size reduced from 159 μm to 135 μm, while in the edge area, it changed from no value to 120 μm. During field tests using the UAV, the results showed an increase of 1.0 m in effective spray width (at a flight height of 4.0 m), indicating that the charges and propellor wind field contributed to the diffusion of droplets towards the edges. Additionally, the droplet density increased by an average of 19.7 droplets/cm2, and the overall deposition increased by 0.12 μL/cm2, resulting in an approximate three-fold increase compared to conventional spray, which aids in insect control and reduces pesticide usage.

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Development of a charge transfer space loop to improve adsorption performance in aerial electrostatic spray

Cited by 4 publications

References 10 publications

Development and Prospect of UAV-Based Aerial Electrostatic Spray Technology in China

Development and Prospect of UAV-Based Aerial Electrostatic Spray Technology in China

Research on Methods Decreasing Pesticide Waste Based on Plant Protection Unmanned Aerial Vehicles: A Review

Development and Characterization of a Contact-Charging Electrostatic Spray UAV System

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