The invention discloses an automatic chemical feeding
system and device for a
plant protection unmanned aerial vehicle. The
system comprises an airborne subsystem of the
plant protection unmanned aerial vehicle and a ground
base station; the airborne subsystem comprises a liquid level detection module and a chemical feeding control module; the output end of the liquid level detection module is connected with the chemical feeding control module; the liquid level detection module is used for detecting the liquid level of a chemical box of the
plant protection unmanned aerial vehicle, and the chemical feeding control module is used for controlling the plant protection unmanned aerial vehicle to return to the ground
base station when the liquid level of the chemical box of the plant protection unmanned aerial vehicle is lower than a preset value; the ground
base station comprises an unmanned aerial vehicle parking detection device, a base
station control center and a chemical feeding device; the output end of the unmanned aerial vehicle parking detection device is connected with the base
station control center, and the output end of the base
station control center is connected with the chemical feeding device. According to the automatic chemical feeding
system and device for the plant protection unmanned aerial vehicle, real-time detection on the liquid level of the chemical box of the plant protection unmanned aerial vehicle can be achieved, when the liquid level in the chemical box is lower than the preset threshold value, the unmanned aerial vehicle is controlled to return to the base station for automatic chemical feeding, and the situation of chemical-free operation of the plant protection unmanned aerial vehicle is avoided.