农机化研究2024，Vol.46Issue(2)：139-144,6.
电磁阀异步启闭的PWM喷雾系统设计与试验
The PWM Spray Characteristic Test of the Asynchronous Opening and Closing of Solenoid Valve
摘要
Abstract
PWM variable spraying is a research hotspot in the field of precision agriculture,but in the process of PWM variable spraying,the rapid opening and closing of the solenoid valve is likely to form pressure pulses in the pipeline,re-sulting in changes in the spray pressure of the nozzle,resulting in a decrease in spray quality.In order to reduce the pressure pulse,a PWM spray system with asynchronous opening and closing of adjacent solenoid valves is designed.The solenoid valve can be opened and closed asynchronouslybydelay control.Under the condition of indoor windless environ-ment,we explored the pressure fluctuation characteristicsin the pipeline before the solenoid valve and the distribution uni-formity of spray deposition.The test results show that compared with the PWM spray system in which the solenoid valve opens and closes synchronously,the asynchronous opening and closing of the solenoid valve can effectively reduce the pressure in the pipeline;under different PWM frequency conditions,the maximum decrease is 14%when the duty cycle is 50%.Under the condition of 20Hz frequency,the coefficient of variation of deposition distribution uniformity of asyn-chronous opening and closing PWM spray is slightly higher than that of conventional continuous spray,but both are less than 15%,which is in line with the national standard of technical performance of boom sprayer.关键词
变量喷雾/脉宽调制/沉积分布均匀性/电磁阀异步启闭Key words
variable spraying/pulse width modulation/deposition distribution/solenoid valve asynchronous分类
农业科技引用本文复制引用
袁常健,张兰婷,韩虎,何雄奎,刘亚佳..电磁阀异步启闭的PWM喷雾系统设计与试验[J].农机化研究,2024,46(2):139-144,6.基金项目
国家重点研发计划项目(2020YFD1000202) （2020YFD1000202）
国家自然科学基金项目(31761133019) （31761133019）
