喷杆喷雾机独立喷嘴控制的实时压力动态研究

Real-time Pressure Dynamics Research on Independent Nozzle Control of Boom Sprayer

喷雾压力的变化会引起喷施流量的变化,最终影响喷雾均匀性。以喷杆喷雾机独立喷嘴控制的实时喷嘴尖端压力为研究对象,基于C37控制器搭建了独立喷嘴控制系统和喷嘴尖端压力数据采集系统,采集了5、10、15路喷嘴同时开闭时喷嘴尖端压力动态,并分析压力动态特性。独立喷嘴控制的实时压力动态试验结果表明,喷嘴开闭的数目对喷嘴尖端压力有明显影响;喷嘴打开的位置对喷嘴尖端压力变化没有明显影响,所有压力传感器采集的喷嘴尖端压力变化一致;同时开闭5、10、15路电磁阀过程中,喷嘴尖端压力在6.0%~20.0%之间变化,喷施流量在3.20%~10.90%之间变化。所得到的喷杆喷雾机独立喷嘴控制的实时压力动态特性,可为大田喷杆喷雾机独立喷嘴控制的喷雾均匀性研究和对靶喷雾技术提供参考。

The change in spray pressure causes the change in spray flow rate and finally affects the uniformity of the spray.In this paper,the real-time nozzle tip pressure controlled by the independent nozzle of the boom sprayer was taken as the research object,the independent nozzle control system and nozzle tip pressure data acquisition system were built based on the C37 controller.The pressure dynamics of the nozzle tip when 5,10,or 15 nozzles were opened and closed at the same time were collected,and the pressure dynamic characteristics were analyzed.The real-time pressure dynamic test results of independent nozzle control showed that the number of nozzle openings and closings had a significant influence on the nozzle tip pressure.The opening position of the nozzle had no significant influence on the pressure change of the nozzle tip,and the pressure changes of the nozzle tip collected by all pressure sensors were consistent.At the same time,in the process of opening and closing 5,10,or 15 solenoid valves,the pressure at the nozzle tip varied during 6.0%and 20.0%,and the spray flow rate varied during 3.20%and 10.90%.Using the independent nozzle control system and nozzle tip pressure data acquisition system built in this paper,the real-time pressure dynamics of independent nozzle control of boom sprayers were obtained,which provided a reference for spray uniformity research of independent nozzle control boom sprayers on a farm and the research of the target spray technology.