Development of sensor system for real-time measurement of droplet deposition of agricultural sprayers  

作　　者：Longlong Li Ruirui Zhang Liping Chen Tongchuan Yi Gang Xu Daxuan Xue Qing Tang Linhuan Zhang Andrew John Hewitt Yining An 

机构地区：[1]Beijing Research Center of Intelligent Equipment for Agriculture,Beijing Academy of Agricultural and Forestry Sciences,Beijing 100097,China [2]National Research Center of Intelligent Equipment for Agriculture,Beijing 100097,China [3]National Center for International Research on Agricultural Aerial Application Technology,Beijing 100097,China [4]Beijing Key Laboratory of Intelligent Equipment Technology for Agriculture,Beijing Academy of Agricultural and Forestry Sciences,Beijing 100097,China [5]College of Information Engineering,Capital Normal University,Beijing 100048,China [6]Centre for Pesticide Application and Safety,the University of Queensland,Queensland 4072,Australia [7]Faculty of Science and Engineering,the University of Nottingham Ningbo China,Ningbo 315100,Zhejiang,China

出　　处：《International Journal of Agricultural and Biological Engineering》2021年第5期19-26,共8页国际农业与生物工程学报（英文）

基　　金：supported by the National Key Research and Development Project of China(Grant No.2019YFD1101102-3);Youth Research Fund of Beijing Academy of Agriculture and Forestry Sciences(Grant No.QNJJ202009);Outstanding Scientist Cultivation Project of Beijing Academy of Agriculture and Forestry Sciences(Grant No.JKZX201903);National Natural Science Foundation of China(Grant No.32071907);and Outstanding Young Talents Projects of Beijing Academy of Agriculture and Forestry Sciences-Research on positioning and control technology and equipment of unmanned vehicles in orchards.Also,Shuaihui Feng,Shufan Chai,Mingjia Zhang and Jiaxing Song’s contributions to this experimental work are highly appreciated.

摘　　要：During the chemical application process,droplet deposition on a target is an important reference indicator for evaluating the spraying technique and its performance.In order to quickly obtain deposition results in the field,this study proposed a novel system based on surface humidity sensors.The basic principle is to convert the measured physical quantity change into a capacitance change,thereby realizing the physical quantity to electrical signal conversion.An Android application for mobile terminal and the corresponding coordinator were developed,which allowed operators to control multiple sensors simultaneously through the Bluetooth.The soluble tracer detected by spectrophotometer was used to calibrate the system.The obtained results indicated a good correlation between deposition volume and voltage increment output from the newly developed system(R2 of the six nozzles with Dv0.5 ranging from 107.28μm to 396.20μm were 0.8674-0.9729),and a power regression model based on the least squares technique(R2=0.8022)was developed.In the field test,the system exhibited an optimal performance in predicting the deposition volume.Compared with the conventional method of measuring tracer concentration,the deviation was less than 10%.In addition,the system exhibited good fitting curve of the deposition distribution with droplet number results measured by the water sensitive paper method.

关 键 词：deposition measurement agricultural sprayer droplets intelligent sensor 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]