Effects of application parameters on spray characteristics of multi-rotor UAV

Abstract

As the new favorite of agricultural plant protection operations, the spray characteristics of plant protection unmanned aerial vehicle (UAV) are the key standards to measure their quality, and the quality of spray of plant protection UAV is largely determined by the droplet drift behavior. Thus, recently, the droplet drift in the operation of plant protection UAV has been extensively studied and discussed. This paper proposes a method for studying the effects of three variables on the deposition characteristics and droplet size using a spray performance comprehensive experimental platform (developed by Jilin Agricultural Machinery Research Institute). The 12 groups of spray experiments were carried out with different combinations, rotor speed, spray height and nozzle speed and regression analysis was carried out on the obtained 12 sets of sedimentary characteristics and droplet size data to explore its effects on the deposition characteristics and droplet size. The results show that the spray height has a significant effect on the sedimentation amount, but the influence on the droplet size is negligible. The nozzle rotation speed and rotor rotation speed have a notable effect on the droplet size, but the effect on the sedimentation volume is not significant. This paper can provide theoretical basis and data support for the study of pesticide application techniques to reduce the phenomenon of droplet drift. Keywords: droplet drift, multi-rotor UAV, experimental platform of droplet collection, laser particle size analyzer, centrifugal nozzle DOI:  10.33440/j.ijpaa.20190201.0025  Citation: Zhu H, Jiang Y, Li H Z, Li J X, Zhang H H.  Effects of application parameters on spray characteristics of multi-rotor UAV.  Int J Precis Agric Aviat, 2019; 2(1): 18–25.