Unmanned aerial vehicle for pollinating watermelons in greenhouse

The invention provides an unmanned aerial vehicle for pollinating watermelons in a greenhouse and belongs to the field of pollination of unmanned aerial vehicles. Four landing gears are uniformly mounted at four sides of the bottom of a duct shell respectively; four ultrasonic sensors are mounted at four sides of the middle part of the duct shell respectively; a first motor is mounted at the upper part of a middle shaft in a duct through a motor bracket; a first rotor wing is mounted on the first motor; two second motors are mounted at two sides of a connecting frame respectively; two rotary barrels are symmetrically mounted on the second motors respectively; the connecting frame is mounted at the bottom of the middle shaft in the duct; a pollination device is mounted at the bottom of the connecting frame; a camera is mounted at the bottom of the connecting frame through a camera bracket. According to the unmanned aerial vehicle provided by the invention, the ultrasonic sensors are mounted at the four sides o