Tandem type oil-electric hybrid unmanned aerial vehicle

Abstract

The invention provides a tandem type oil-electric hybrid unmanned aerial vehicle. The oil-electric hybrid unmanned aerial vehicle comprises a vehicle body, a plurality of electric motors, a plurality of propellers, a fuel oil engine, an alternator, a rectifier, a battery, an accelerator servo and a control circuit, wherein the control circuit detects the electric quantity and charge-discharge status of the battery in real time and controls the rotating speed of the fuel oil engine in a closed manner, thereby controlling the electric quantity of the battery. The tandem type oil-electric hybrid unmanned aerial vehicle has high cruising ability, flies stably and can be applied to remote pipeline patrol and electric line patrol, small-scale express delivery, emergency and relief work which requires high-density takeoff and landing, large-area plant protection operation, long-time unmanned hang photographing, air surveillance, emergency locale information feedback and the like.

Description

technical field [0001] The invention relates to an aircraft, in particular to a serial oil-electric hybrid unmanned aircraft. Background technique [0002] In recent years, brushless electric drones have been widely used because of their good maneuverability, flexibility and convenience. Most multi-rotor aircraft are composed of four main components: battery, electric motor, electronic governor, and flight controller. [0003] At present, most brushless electric drones use polymer lithium batteries to provide energy. Limited by the energy density of batteries, the battery life of drones is mostly limited to less than 30 minutes. Increasing the load capacity of the battery can effectively improve the endurance time, because more batteries increase the take-off weight, which requires the motor to stay in the air with a higher output, so it is difficult to achieve longer endurance time. [0004] At present, there are two known schemes that can effectively prolong the unmanne...

AI Technical Summary

Problems solved by technology

Limited by the energy density of the battery, the battery life of drones is mostly limited to less than 30 minutes

Increasing the load capacity of the battery can effectively increase the endurance time, because more batteries increase the take-off weight, which requires the motor to stay in the air with a higher output, so it is difficult to achieve longer endurance time

[0004] At present, there are two known schemes that can effectively prolong the unmanned life time. All four methods can increase the life time of the drone to more than 30 minutes, but each has its own disadvantages: the first one is based on patents CN102514711A and CN204473131U. The representative parallel gasoline-electric hybrid power scheme; this scheme uses the fuel engine and the electric motor to drive different propellers respectively, with the fuel engine as the main power output, and the electric motor as the power output auxiliary to achieve extended endurance time; because the fuel engine is used to drive the rotor The direct output of this scheme has special requirements for propeller layout and body structure, so it is inevitable to make necessary trade-offs in the optimization of aerodynamic layout and structural layout during design; the second one is represented by the design of a German company Yeair The parallel gasoline-electric hybrid scheme differs from the first scheme in that it uses a fuel engine and an electric motor to drive the same propeller, that is, each propeller is equipped with two power sources; although this scheme has a certain impact on battery life However, multiple miniaturized fuel engines will inevitably reduce the overall thermal efficiency of the engine and increase the probability of failure

Although fuel cells have a high energy density, the power-to-weight ratio of existing technologies is much lower than that of micro internal combustion engines and their cost is high, so there are many difficulties in the application of existing technologies on non-aircraft

[0005] Therefore, it is a technical problem to be solved urgently in this field to design a battery that can break through the bottleneck of low energy density of the battery, prolong the battery life of the UAV, and overcome the constraints of the above-mentioned existing technical solutions.

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