| 基于PWM的远程控制新型变量喷雾系统设计 |
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| 引用本文： | 武同昆,周超英,谢鹏.基于PWM的远程控制新型变量喷雾系统设计[J].农机化研究,2017(7):76-82. |
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| 作者姓名： | 武同昆 周超英 谢鹏 |
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| 作者单位： | 哈尔滨工业大学 深圳，广东深圳 518000; 深圳市先进制造技术重点实验室，广东深圳 518000 |
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| 基金项目： | 深圳市创新环境建设计划重点实验室提升项目( ZDSYS20140508161547829)；深圳市科技计划基础研究项目( JCYJ20150625142543480)；深圳市科技计划基础研究项目(JCYJ20150625142543480，JCYJ20150625142543449) |
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| 摘 要： | 针对目前地面植保喷雾机械的局限性,开发了一种新型的变量喷雾系统。该系统在保持电动离心喷头压力和流量不变的前提下,采用离心雾化方式,雾化盘由三相无感无刷直流电机带动,利用ARM控制器输出频率固定占空比不同PWM信号作为无刷直流电机电子调速器的油门转速信号,改变雾化盘的转速,从而改变雾滴的粒径大小及覆盖率等参数。该系统采用了一个功率较大的无线收发模块SI4432,最大距离达到2km范围(这也是和其他远程喷雾系统相比根本的优势),用单片机和上位机远程实时地控制雾化盘的转速,同时在上位机和液晶屏幕上显示占空比。最后,利用设计的变量喷雾平台,在喷头压力为0.5MPa、流量为2L/min、雾化盘直径为5 8 mm的条件下,获得了离心雾化喷头在不同的占空比对应的雾滴中值直径和覆盖率大小,通过上位机就可以实现电动离心喷头转速的较大范围的调整,可以在不同喷雾环境下针对不同的农作物使用这套系统。
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| 关 键 词： | PWM 远程控制 离心雾化 喷雾系统 单片机 |
Remote Control Variable Rate Sprayer Controller System Based on PWM |
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| Wu Tongkun,Zhou Chaoying,Xie Peng.Remote Control Variable Rate Sprayer Controller System Based on PWM[J].Journal of Agricultural Mechanization Research,2017(7):76-82. |
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| Authors: | Wu Tongkun Zhou Chaoying Xie Peng |
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| Abstract: | Due to the limitations of ground plant protection spraying machinery , a new type of variable spray system was designed .Under the premise of constant pressure , centrifugal atomization was adopt in the spray system , the atomizing disk is driven by three phase brushless DC Motor , apply different duty cycles PWM principle from ARM Controller , change the speed of atomizing disk , thus changed the parameters , such as particle size of the droplet , coverage etc .The variable spray system adopt a radio frequency chip SI 4432 , MCU and PC to control the speed of atomizing disk remotely , at the same time, the duty cycle of PWM is shown on LCD and PC .At last, when the diameter of atomizing disk is 58mm,nozzle pressure is 0.5MPa and the flow is 2L/min ,use the variable spray platform , get the Dv(50) and coverage size of droplet that correspond to different duty cycles .A wide speed range of atomizing disk can be changed by PC .So , the system can be used in different occasions . |
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| Keywords: | PWM remote control centrifugal atomizing spray system MCU |
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