Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Development of Aerial Application System Attachable to Unmanned Helicopter - Basic Spraying Characteristics for Aerial Application System -

무인헬리콥터를 이용한 항공방제시스템 개발(I) - 항공방제시스템 구축을 위한 기초 분무특성 -

  • Kang, Tae-Gyoung (Department of Agricultural Engineering, National Academy of Agricultural Science) ;
  • Lee, Chai-Sik (Department of Agricultural Engineering, National Academy of Agricultural Science) ;
  • Choi, Duck-Kyu (Department of Agricultural Engineering, National Academy of Agricultural Science) ;
  • Jun, Hyeon-Jong (Department of Agricultural Engineering, National Academy of Agricultural Science) ;
  • Koo, Young-Mo (Bio-Industrial Machinery Engineering, Kyungpook National University) ;
  • Kang, Tae-Hwan (Agricultural Science & Technology Research Institute, Chungbuk National University)
  • Received : 2010.06.30
  • Accepted : 2010.08.05
  • Published : 2010.08.25
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Abstract

In order to develop an precision aerial pesticide application system to be attached to an unmanned helicopter which can be applied to small lots of land, this study analyzed the flowing and spraying characteristics of the spray droplets by the main rotor downwash by setting the application conditions at the flight altitude of 3 m, the diameter of main rotor of 3.1 m, the boom length of around 2.8 m, and the spraying rate of 8 L/ha. The results of this study are summarized below. Through analysis of the covering area ratio of the spray droplets by main rotor downwash by nozzle type, boom with tilt angle and height, it was found that the covering area ratio of the twin flat-fan nozzle of around 25% was more uniform than other types of nozzle, also boom with $10^{\circ}$ tilt angle and spraying height of 3 m was shown to be the appropriate conditions for aerial application of pesticides. It was found that the nozzle position to minimize the scattering loss of spray droplets due to vortex phenomenon at both ends of the main rotor was around 10 cm from the end of the main rotor. An application test for the aerial pesticide application system attached to the HUA-ACEI unmanned helicopter developed by the Rural Development Administration showed that the range of covering area ratio of the spray droplets was 10-25%, and the spraying width was approximately 7 m when over 10% of covering area ratio was considered for valid spraying.

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References

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