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Method for uav spraying pattern measurement with PLS model based spectrum analysis

International Journal of Agricultural and Biological Engineering 2020年第3期13卷 22-28页

作者： Ruirui Zhang Yao Wen Longlong Li Liping Chen Gang Xu Yanbo Huang Qing Tang Tongchuan Yi National Research Center of Intelligent Equipment for Agriculture Beijing Academy of Agricultural And Forestry SciencesBeijing 100097China Beijing Research Center of Intelligent Equipment for Agriculture Beijing Academy of Agricultural And Forestry SciencesBeijing 100097China National Center for International Research on Agricultural Aerial Application Technology Beijing Academy of Agricultural And Forestry SciencesBeijing 100097China Beijing Key laboratory of Intelligent Equipment Technology for Agriculture Beijing Academy of Agricultural And Forestry SciencesBeijing 100097China United States Department of Agriculture Agricultural Research ServiceCrop Production Systems Research UnitStoneville MS 38776USA

Unmanned aerial vehicle(uav)chemical application is widely used for crop protection,and spraying pattern is one of the most important factors that influence the chemical control efficacy.A method for uav spraying pattern measurement with partial least squares(PLS)model based spectrum analysis was proposed in this study to measure the uav spraying pattern more *** method involved the steps of fluorescent tracer solution spray and its droplets collection,the spectrum on paper strip acquiring,spectrum processing and analysis,PLS *** order to verify the applicability of the method and obtain the parameters of the PLS model,uav spraying experiments were performed in the *** Fluorescent tracer solution was sprayed and its droplets are collected by paper strip,and the original spectrum on paper strip obtained by a spectrometer was processed by the Savitzky-Golay and standard normalized variable(SNV)*** prediction model of coverage rate selected as the droplet deposition parameter to measure the uav spraying pattern,was established by using PLS *** verify the superiority of the PLS model,a traditional linear regression(LR)model of coverage rate was established *** results demonstrate that the method with PLS model based spectrum analysis can measure the uav spraying pattern effectively,and PLS model has a better performance of RV2=0.94 and RMSEP=0.9446 than that of the LR model.

关键词： pattern measurement uav spraying spectrum model coverage rate partial least squares method

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Design and performance test of a novel uav air-assisted electrostatic centrifugal spraying system

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International Journal of Agricultural and Biological Engineering 2022年第5期15卷 34-40页

作者： Heming Hu Yutaka Kaizu Jingjing Huang Kenichi Furuhashi Hongduo Zhang Xu Xiao Ming Li Kenji Imou Graduate School of Agricultural and Life Sciences the University of TokyoTokyo 113-0033Japan Hunan Agricultural Equipment Research Institute Changsha 410125China Hunan Advanced Engineering Technology Research Center for Agricultural Aviation Changsha 410125China Hunan Agricultural University Changsha 410128China

In order to improve the deposition and uniformity of the pesticide sprayed by the agricultural spraying drone,this study designed a novel spraying system,combining air-assisted spraying system with electrostatic ***,an air-assisted electrostatic centrifugal spray system was designed for agricultural spraying drones,including a shell,a diversion shell,and an electrostatic ***,experiments were conducted to optimize the setting of the main parameters that affect the charge-to-mass ratio,and outdoor spraying experiments were carried out on the spraying effect of the air-assisted electrostatic centrifugal spray *** results showed the optimum parameters were that the centrifugal rotation speed was 10000 r/min,the spray pressure was 0.3 MPa,the fan rotation speed was 14000 r/min,and the electrostatic generator voltage was 9 kV;The optimum charge-to-mass ratio of the spray system was 2.59 mC/*** average deposition density of droplets on the collecting platform was 366.1 particles/cm^(2) on the upper layer,345.1 particles/cm^(2) on the middle layer,and 322.5 particles/cm^(2) on the lower *** to the results of uncharged droplets on the upper,middle,and lower layers,the average deposition density was increased by 34.9%,30.4%,and 30.2%,respectively,and the uniformity of the distribution of the droplets at different collection points was better.

关键词： uav spraying droplet drift centrifugal sprayer air-assisted spraying electrostatic spraying

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