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当前位置: 首页 > 文章 > 用大喷头脉宽调制间歇喷雾提高沉积率的试验研究 农业工程学报 2009,25 (1) 104-108
Position: Home > Articles > Experimental study on improving deposition rate using PWM-based intermittent spray from enlarged nozzle Transactions of the Chinese Society of Agricultural Engineering 2009,25 (1) 104-108

用大喷头脉宽调制间歇喷雾提高沉积率的试验研究

作  者：
邓巍;何雄奎;丁为民
单  位：
南京农业大学工学院;中国农业大学理学院
关键词：
沉积率;脉冲宽度调制(PWM);间歇喷雾;农药喷施;雾滴速度;雾滴粒径
摘  要：
为了得到合适的雾滴细度,提高雾滴运动速度,从而提高农药喷施沉积率,该文提出一种基于脉冲宽度调制(pulse width modulation,PWM)间歇喷雾的沉积率提高方法。试验设置3种流量控制方法(改变液压控制流量;PWM间歇喷雾控制流量以及结合脉宽调制、喷头尺寸和液压调节共同控制流量),采用4组试验对雾滴粒径和速度的影响规律进行研究。研究结果表明,使大喷头在提高工作压力的情况下间歇喷雾,通过系统调节喷雾占空比、压力和喷头大小,可在流量得到控制的同时,产生合适的粒径谱,雾滴速度得到提高,从而改善雾滴沉积率。
译  名：
Experimental study on improving deposition rate using PWM-based intermittent spray from enlarged nozzle
作  者：
Deng Wei 1 ,He Xiongkui 1 ,Ding Weimin 2※ (1.College of Science,China Agricultural University,Beijing 100193,China; 2.College of Engineering,Nanjing Agricultural University,Nanjing 210031,China)
关键词：
deposition rate,pulse width modulation(PWM),intermittent spray,pesticide spray,spray droplet velocity, spray droplet diameter
摘  要：
In order to obtain appropriate small spray droplet size spectra and increase spray droplet velocity,so as to improve pesticide spray deposition rate,a method to improve spray deposition rate using PWM-based(pulse width modulation,PWM)intermittent variable spray technology was discussed.Through four groups of comparative tests,the effects of three kinds of flow-rate control methods on spray droplet sizes and velocity were compared.The three flow-rate control methods are:1)spray flow-rate control by changing pressure,2)spray flow-rate control by PWM-based intermittent variable spray,and 3)spray flow-rate control by combining PWM-based intermittent variable spray,variety of nozzle size,and change of pressure.The study results show that not only can the flow-rate be controlled,but also suitable smaller droplet diameter spectra can be obtained and spray droplet velocity can be increased through adjusting spray duty cycle,spray pressure,and nozzle size using the method of PWM-based intermittent spray from enlarged nozzles operated at increased liquid pressure.Therefore,spray deposition rate could be improved.

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