Effect of temperature and humidity on droplet deposition of unmanned agricultural aircraft system

Haixia Qi, Zhenxin Lin, Jingkang Zhou, Jianwen Li, Pengchao Chen, Fan Ouyang

Abstract


Abstract: Meteorological factors are one of the important factors that affect the distribution characteristics of droplet deposition and drift in unmanned agricultural aircraft system spraying operations.  Among meteorological elements, there are many studies about the effects of wind speed, but there are few studies about other variables such as temperature and humidity.  In order to reveal the effect of temperature and humidity on the droplet deposition parameters of unmanned agricultural aircraft system spraying operations, this study designed an experiment based on the following conditions: (1) a wind tunnel lab environment that can well control the environmental wind speed conditions; (2) UAV indoor orbit operation platform that can greatly reduce the difference in UAV flight status; (3) Guangzhou's environment with great variable temperature and humidity in December.  The results show that the influence of air pressure and light on the droplet deposition is not significant; with the increase of the environmental humidity, the droplet size, coverage, and deposition amount will increase; within the temperature range of 10~29°C, the effect of temperature conditions on droplets deposition is not significant.  The research results can provide guidance for the practical production and application of agricultural aviation to reduce droplet loss and improve pesticide utilization.

Keywords: temperature, humidity, plant protection UAV, spray, droplet deposition

DOI: 10.33440/j.ijpaa.20200303.100

 

Citation: Qi H X, Lin Z X, Zhou J K, Li J W, Chen P C, Ouyang F.  Effect of temperature and humidity on droplet deposition of unmanned agricultural aircraft system.  Int J Precis Agric Aviat, 2020; 3(3): 41–49.


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