农机化研究2024，Vol.46Issue(2)：132-138,7.
果园风送喷雾风力调控试验台设计及试验
Design and Test of the Airflow Adjustment Test Bench for Orchard Air-assisted Spraying
摘要
Abstract
Pesticide application rate and air supply rate are the two manipulated outputs of an orchard sprayer control sys-tem.The distribution of pesticide deposits inside and outside the canopy of fruit trees depends largely on the air supply rate supply.The pesticide application rate and air supply rate should be simultaneously controlled precisely to realize the orchard precision spraying.Based on the axial flow fan,this paper designs an orchard airflow adjustment test bench that can independently control the fan speed,the air inlet area and the angle of deflectors in the bellows.The fan speed is ad-justed by DC motor,the air inlet adopts a louver structure to change the air inlet area by adjusting the inclination angle of the louvers,the air outlet adopts a tower structure,the deflectors at different nozzle positions of the air outlet are con-trolled by 22 steering gears to independently adjust the angle of the deflector,and developed the host computer interface based on C#language.The independent wind adjustment characteristic tests of fan speed,air inlet area and angle of de-flectors in the air outlet was carried out based on the test bench.The results show that the variation of air speed and air volume at the outlet is positively correlated with the fan speed and the air inlet area regulation,the distribution position of air velocity at the outlet in the vertical direction changes with the increase of the deflector tilt angle.Meanwhile,the rela-tionship model between the maximum wind velocity at the outlet and the fan speed and the air inlet area is established re-spectively.In the process of spraying,the air speed and air volume at different positions of the fruit tree canopy can be regulated by adjusting the fan speed and the inclination angle of the deflector or the air inlet area and the inclination angle of the deflector.This research provides a new method for the airflow online on-demand adjustment based on changes in the volume and density of the fruit tree canopy,which is of great significance to accelerate the application of precision spraying technology in orchard.关键词
果园精准施药/风力调控试验台/风送喷雾Key words
orchard precision spraying/airflow adjustment test bench/air-assisted spraying分类
农业科技引用本文复制引用
李琪,窦汉杰,翟长远,高原源,杨硕,赵春江..果园风送喷雾风力调控试验台设计及试验[J].农机化研究,2024,46(2):132-138,7.基金项目
国家自然科学基金面上项目(31971775) （31971775）
北京市农林科学院智能装备技术研究中心开放项目(KFZN2020W012) （KFZN2020W012）
