Multi-rotor plant protection unmanned aerial vehicle

Abstract

The invention discloses a multi-rotor plant protection unmanned aerial vehicle, belonging to the technical field of unmanned aerial vehicles. The multi-rotor plant protection unmanned aerial vehicle comprises an undercarriage, a body, a rack, arms, a main rotor, an auxiliary rotor, a spray system and a control system, wherein the body is arranged above the undercarriage and connected with the undercarriage; the rack is arranged above the body and connected with the body; the arms are mounted on the rack; even number of arms are provided and symmetrically distributed on the rack; an engine is arranged at the upper part of the rack; the main rotor is connected with an output shaft of the engine; an motor is arranged on each arm; an output shaft of each motor is connected with the corresponding auxiliary rotor; a spoiler is arranged on each arm; the spoilers are used for offsetting the anti-torque effect generated by the rotation of the main rotor; the control system, the engine and the motors are all connected with a power supply; and the control system controls the working states of the main rotor, the auxiliary rotors and the spray system. In the invention, gasoline-electric hybrid power is adopted, the whole structure is simplified, the structure is simple, and the time of endurance is long.

Description

technical field [0001] The invention relates to an unmanned aerial vehicle, in particular to a multi-rotor plant protection unmanned aerial vehicle. Background technique [0002] Unmanned aerial vehicles, referred to as unmanned aerial vehicles, have developed rapidly in recent years due to their applicability to various environments and their rapid response capabilities. UAVs can be divided into various types according to their structural characteristics, including fixed-wing UAVs, unmanned helicopters, multi-rotor UAVs, etc. Among them, the take-off and landing of fixed-wing UAVs requires a relatively open space and complex terrain. However, the anti-torque generated when the propeller of the unmanned helicopter rotates needs to be balanced by the tail rotor, and the transmission from the propeller to the tail rotor must ensure a certain transmission ratio. In addition, the output shaft of the engine needs to be transmitted to the The propeller requires an additional dece...

AI Technical Summary

Problems solved by technology

UAVs can be divided into various types according to their structural characteristics, including fixed-wing UAVs, unmanned helicopters, multi-rotor UAVs, etc. Among them, the take-off and landing of fixed-wing UAVs requires a relatively open space and complex terrain. However, the anti-torque generated when the propeller of the unmanned helicopter rotates needs to be balanced by the tail rotor, and the transmission from the propeller to the tail rotor must ensure a certain transmission ratio. In addition, the output shaft of the engine needs to be transmitted to the The propeller requires an additional deceleration device. At the same time, the design and structure of the propeller hub is complex, and its design and maintenance costs are high. When the propeller rotates at high speed, there are many transmission parts. Once any part fails, it will cause immeasurable safety hazards. Therefore, no one The failure rate of driving a helicopter is relatively high. At the same time, due to the large number of fuselage components, the weight of the fuselage is relatively large, resulting in limited payload capacity. In addition, in order to maintain the balance of the helicopter, the addition of a longer tail beam results in a larger overall structural size. It is convenient for packaging, carrying and transportation, and also increases the weight of the whole machine

Although the multi-rotor UAV is flexible and light, it has been used in the field of aerial photography and reconnaissance, but because the multi-rotor UAV is powered by electricity, and the battery capacity is small, the effective load of the whole machine is greatly limited, and The service life of the battery is short, the relative price is relatively high, and it needs to be charged continuously, which increases the cost and wastes time. When a multi-rotor drone is flying, if there is a problem with one rotor, it will cause the entire drone to crash. Serious consequences. In addition, multi-rotor flight requires high-speed operation of the rotors on each axis to provide lift, so it consumes more power, and the effective working time is greatly shortened. At the same time, if you want to increase the power configuration, you need a larger capacity battery or increase the number of batteries. , which leads to an increase in the self-weight of the multi-rotor UAV, which cannot meet the heavy load requirements of the multi-rotor UAV

Images