INCREASING THE FLIGHT ENDURANCE OF AGRICULTURAL DRONES

The analysis and review of methods for solving the problem of short flight duration of unmanned aerial vehicles (UAVs) for agricultural purposes is performed. The state of the issue of insufficient flight time and the need to charge drones to ensure full automation and continuity of the work process is studied. The main types and models of batteries used in UAVs as energy sources are characterized. The main methods of their refueling are considered in a comparative aspect. Particular attention is paid to the study of the advantages and disadvantages of technical solutions to the designated problem. Such methods as: using an automatic charging station for drones, designing drones called "flying batteries", using a laser and a high-power electromagnetic field are noted and described. A method for increasing the flight duration of a drone by installing a payload and a power source on an accompanying vehicle (TS) is proposed. It is recommended to provide a wired connection between the drone and the TS for charging the drone and refueling it with chemical liquids for spraying crops. The following advantages are noted: continuous power supply to the drone from the vehicle, increased duration of spraying without refueling with chemicals, the ability to perform various tasks by drones, no need for expensive drones due to the possibility of using low-power engines due to the location of power sources on the vehicle. To solve the above problem, an automated device for replacing UAV batteries is proposed, which will increase the flight duration. This device consists of two drums for batteries in which feed springs are installed, a control module, a drum shaft drive, and a platform for automatic drum change and battery charging.