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首页> 外文会议>American Society of Agricultural and Biological Engineers Annual International Meeting >Design and Test on Orchard Air-assisted Variable Rate Sprayer
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Design and Test on Orchard Air-assisted Variable Rate Sprayer

机译：果园空气辅助变速喷雾器的设计与测试

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摘要

Orchard variable-rate spraying technology is an effective way to improve pesticide utilization and reduce environmental pollution. However, spray stability and accuracy are the bottleneck problem in the development of variable-rate spraying technology. The air-assisted orchard sprayer3 WF-400Z is commonly used in China, which is applied as the research object in this paper. Firstly, the traditional nozzle was replaced by the combination of "solenoid valve + nozzle", and the solenoid valve was mountedupstream of the spray head and connected by a hose, independent adjustment of spray flow of each nozzle was achieved by adjusting the duty cycle of the PWM signal. Then the manual pressure regulating valve was modified into a direct acting proportionalrelief valve, and a turbo flow sensor and a piezoresistive pressure sensor were installed in the main pipeline. After that, the signal feedback loop was constructed by the pressure sensor to conquer the pressure fluctuation characteristics in the spray system, and the analog adjustment proportional relief valve was output by the PID algorithm to ensure that the system working pressure is stable at the preset value. Finally, the control system and human-computer interaction interface were constructed byapplying industrial control board and touch screen, from which the sprayer obtain the spraying amount of every nozzle and spray as required. Experimental results showed that the orchard variable rate sprayer could meet the flow-duty cycle model in actualwork, and the control system exhibited high precision and stability.
机译：果园变速率喷涂技术是提高农药利用率，减少环境污染的有效途径。然而，喷雾的稳定性和精确性都在变速率喷涂技术发展的瓶颈问题。的空气辅助式果园sprayer3 WF-400Z通常在中国使用，这被作为本文的研究对象。首先，传统的喷嘴通过的“电磁阀+喷嘴”的组合来取代，并且所述电磁阀是喷头的mountedupstream以及连接通过软管，各喷嘴的喷射流的独立调节，通过调节的占空比来实现的PWM信号。然后手动压力调节阀被修改成直接作用proportionalrelief阀，和一个涡轮流量传感器和压阻式压力传感器被安装在主管道。在此之后，信号反馈环路是由压力传感器构造成克服在喷雾系统中的压力波动的特性，并且将模拟调整比例溢流阀由PID算法的输出，以确保系统的工作压力稳定在预设值。最后，控制系统和人机交互界面构建byapplying工控板和触摸屏，从该喷雾器获得每个喷嘴的喷射量，并根据需要喷雾。实验结果表明，果园可变速率喷雾器能满足在actualwork流动占空比模型，并且所述控制系统显示出高的精度和稳定性。

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