大田环境中不同助剂和喷头对无人机喷洒雾滴分布和漂移的影响

Effects of different adjuvants and nozzles on droplet distribution and drift when applied with UAV

【目的】探索在大田环境中不同助剂和喷头型号对无人机喷洒雾滴分布和漂移的影响。【方法】利用色素染色法染色雾滴,使用大疆MG-1S无人机进行喷洒作业,并收集雾滴卡进行扫描分析。喷洒中使用φ为1%的不同助剂溶液或不同种类喷头,以比较助剂和喷头对雾滴分布的影响。【结果】室内喷洒φ为1%助剂溶液时,雨燕油性助剂、禾大助剂提高雾滴粒径的效果较优。IDK 120-01喷头增大雾滴粒径效果最明显。在大田测试中,所有的助剂相比清水对照都降低了漂移。大部分雾滴集中于距离喷洒航线2 m距离内。离地80 cm处的雾滴沉积量比离地50 cm的雾滴沉积量少40%~60%。雨燕油性助剂在目标区域沉积较多。目标区域内使用IDK 120-01喷头的雾滴沉积量最大,但单位面积的雾滴数量较少。【结论】使用助剂和大粒径喷头均可以明显降低雾滴漂移,提高目标区域雾滴沉积量。不同助剂抗漂移效果有明显差异。

【Objective】To explore the influences of different adjuvants and nozzles on the distribution and drift of droplets when applied with UAV in the field environment.【Method】The droplets were dyed by pigment staining.DJI MG-1S was used for spraying.The droplet reception cards were collected,scanned and analyzed.The solutions of different adjuvants(φ=1%)and different nozzles were used to compare the influences of adjuvant and nozzle on distribution of droplets.【Result】In the lab spraying experiments,the solutions of Yuyan oily and Heda adjuvants(φ=1%)showed better effect on increasing droplet size.The IDK 120-01 nozzle increased droplet size most significantly.In the field test,compared with clear water control,all adjuvants reduced drift,most droplets were within two meters of the spraying route.The amount of droplets at 80 cm above the ground was 40%–60%less than that at 50 cm above the ground.Yuyan oily adjuvant had more deposition in the target area.The IDK 120-01 nozzle showed the most deposition in the target area with less droplet number per unit area.【Conclusion】Using adjuvants and large droplet size nozzles can significantly reduce drift and increase deposition in the target area.The anti-drift effects of different adjuvants are significantly different.