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Design and experiment of variable rate orchard sprayer based on laser scanning sensor

International Journal of Agricultural and Biological Engineering 2018年第1期11卷 101-108页

作者： Longlong Li Xiongkui He Jianli Song Yajia Liu Aijun Zeng Liu Yang Chaohui Liu Zhixiong Liu Center for Chemicals Application Technology(CCAT) College of ScienceChina Agricultural UniversityBeijing 100193China Wuxi Zhongbo Machinery Manufacturing Co. LtdWuxi 214028China Beijing Hualing Feichi Information Technology CO. LTDBeijing 100094China

During different growth periods,canopy size and density in orchards are variable,which need application conditions(flow rate and air flow)to be adjusted to match the canopy’s *** order to improve orchard sprayer’s automatic operating performance,an automatic variable-rate orchard sprayer(VARS)fixed with 40 electromagnetic valves and 8 brushless fans was developed based on the canopy’s spatial *** solenoid valve and brushless motor can be individually adjusted in real-time through pulse width modulation(PWM)signals emitted by a control system to adjust each nozzle’s spout and fan rotation speed.A high-precision laser scanning sensor(light detecting and ranging,LIDAR)was adopted as the detector to measure the canopy volume using the variable rate algorithm *** experiments were conducted in an apple orchard,and conventional air blast sprayer(CABS)and directed air-jet sprayer(DAJS)were tested as a *** showed that on average,46%less spraying solution was applied compared to conventional applications,while penetration rate was similar to *** deposition in the canopy with variable application was higher than that of conventional applications,indicating that electronic sprayers are more efficient than conventional *** was also observed that VARS could significantly reduce off-target *** field experiment showed that the newly developed variable-rate sprayer can greatly reduce pesticide use and protect the environment for the orchard fruit production,and also provide a reference for design and performance optimization for plant protection machinery.

关键词： variable rate orchard sprayer spatial dimension air volume flow rate laser scanning sensor precision agriculture

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