KR20150136641A - Vertical takeoff and landing aircraft for agricultural chemicals spraying - Google Patents

Abstract

The vertical take-off and landing device for agricultural use according to the present invention includes a body portion, a control portion coupled to the body portion, a frame having one end coupled to the body portion and extending radially from the center of the body portion, A propulsion unit coupled to one end of the engine and configured to rotate by the engine to generate a thrust in a vertical direction, a fuel tank installed in the body, A fuel supply unit fixed to the frame and configured to supply fuel to each of the engines, and a pesticide application unit installed on the body unit and spraying pesticides. .
According to the present invention, there is provided an agricultural landing control vertical take-off and landing device for agricultural use, which has a large loadable maximum load, a long flight time, a large number of propellers, a high stability, and a simple structure.

Description

{Vertical takeoff and landing aircraft for agricultural chemicals spraying}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vertical landing machine for unmanned agricultural irrigation, and more particularly, to an agricultural unmanned vertical take-off and landing aircraft having a large maximum load and a long flight time with a large number of engines and propellers.

A helicopter is an aircraft with lift and propulsive force generated by turning a rotating wing, called a rotor, to the engine. Vertical takeoff and landing and air stopping are possible, and the rotary wing controls the angle so that it can move forward, backward, and horizontally.

Helicopters are available for a variety of purposes such as police service, lifeguarding, fire suppression, aerial photographing, and the ability to take off and land on a small area, fly at slow speed along complicated terrain, and stay in one place. In addition, a helicopter may be used without aerial photographing, pesticide spraying, or the like, without user's direct boarding.

However, since the conventional helicopter is composed of the main rotor and the sub rotor two wings, even if a single wing is damaged or obstructed, the unmanned helicopter crashes, and at the same time, the side is gentle and flat, I have a problem.

Recently, a multi-copter with a number of electric motors and propellers has been developed that uses a battery to operate as an electric motor. The multi-copter is a type of helicopter capable of vertical takeoff and landing, . Most multicopers have an even number of rotor blades in the form of two pairs (quadrupole copter, X copter), three pairs (hexacopter, Y-6) and four pairs (octocopter) In the case of -6, it is placed on the two lower planes. However, the multi - copter has a limited take - off load due to the use of electricity from the battery, which limits the flight time.

In addition to the main power source of helicopter, agricultural power source is needed to spray pesticide. In order to load pesticide and agricultural water, large capacity battery is needed. However, large-capacity batteries are very expensive and heavy, which makes it difficult to mount them on unmanned helicopters.

As a conventional technique, Patent Document 1 proposes a rotary wing unmanned reconnaissance aircraft having four wing structures, but it has a disadvantage in that it can not fly for a long time like a vertical unmanned agricultural landing aircraft of the present invention and the load load is not large.

1. Korean Published Patent No. 10-2008-0099839

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned needs, and it is an object of the present invention to provide a multi-copter which can operate with a battery and an electric motor, And a vertical take-off and landing aircraft for agricultural use having an engine and a propeller.

According to another aspect of the present invention, there is provided an agricultural lifting / unloading vertical take-off and landing machine for agricultural use including a body part, a control part coupled to the body part, A propulsion unit coupled to the other end of the frame and driven by receiving signals from the control unit and a propeller coupled to one end of the engine and rotated by the engine to generate a thrust in a vertical direction, A fuel supply unit which is composed of a fuel tank installed in the body and a fuel line fixed to the frame and supplying fuel to each engine, and an agrochemical spraying unit installed in the body and spraying agrochemicals .

According to an embodiment of the present invention, the controller controls a throttle valve that controls a fuel injection amount of the engine to control a rotational speed of the propeller, thereby controlling a posture and a thrust of the vertical take-off and landing device.

In one embodiment of the present invention, the propulsion unit is characterized in that the propeller rotating in the clockwise direction and the propeller rotating in the counterclockwise direction are paired.

According to an embodiment of the present invention, the pesticide spraying unit includes a battery installed in the body, a medicine pail, and a DC pump for supplying the medicine to the spraying nozzle in the medicine pail.

In an embodiment of the present invention, the remote control and remote control may be performed by remote control of the unmanned control vertical take-off and landing device, and GPS for confirming the position of the unmanned control vertical take-off and landing device and transmitting it to the control unit .

In one embodiment of the present invention, the propulsion unit includes a starter connected to the engine shaft in the opposite direction to which the propeller is connected, and the control unit receives a start signal from the remote controller and transmits a current signal to the starter And the engine is activated by an electric motor of the starter.

The present invention has a large maximum load and a long flying time as compared with a multi-copter in which a fuel cell is disposed at the center and a plurality of engines and a propeller are used for a battery and an electric motor.

In addition, it is equipped with a large number of propellers, and has high stability.

1 is a perspective view showing a vertical landing gear for agricultural unmanned control using a plurality of engines and propellers according to the present invention.
2 is a plan view of an unmanned vertical take-off and landing aircraft according to the present invention.
3 is a view showing a propulsion unit of an unmanned vertical take-off and landing aircraft according to the present invention.
4 is a side view of the unmanned vertical take-off and landing aircraft according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings illustrate only the essential features of the invention in order to facilitate clarity of the invention, and the accompanying drawings are not intended to be construed in a limiting sense.

2 is a plan view of an unmanned vertical take-off and landing device according to the present invention. The vertical take-up and landing device includes a body 100, a control unit 200, a frame 200, (300), a propulsion unit (400), a fuel supply unit (500), and an agricultural chemical spraying unit (600).

The body part 100 may further include landing means for supporting the vertical take-off and landing device so as to be spaced apart from the ground at a predetermined height.

The controller 200 may be coupled to the body 100. The control unit 200 controls the propulsion unit 400 and the fuel supply unit 500 to stably control the flight of the vertical take-off and landing device and the spraying of the chemical solution.

The frame 300 has one end coupled to the body 100 and extending radially from the center of the body 100, and may be formed of two or more pairs. The conventional helicopter has two wing structures and is low in stability and is likely to fall when one wing is damaged. However, the frame 300 according to the present invention extends radially to the body 100 and is formed as a pair The stability of flight can be improved.

3, the propulsion unit 400 is coupled to the other end of the frame 300, receives signals from the control unit 200, and drives the propulsion unit 400 And a propeller 420 coupled to one end of the engine 410 and rotated by the engine 410 to generate a vertical thrust. The vertical take-off and landing according to the present invention has a large number of engines 410 and a propeller 420 and has a large maximum load and a long flight time as compared with a multi-copter using a battery and an electric motor. Engine 410 may be a nitro engine, two-stroke or four-stroke gasoline engine. In addition, since a plurality of propellers 420 are provided, the flight stability is excellent, and even if a single wing is damaged due to a simple structure, it is possible to fly. At present, the unmanned helicopter is two months in pilot training period, but the vertical take-off and landing aircraft according to the present invention composed of four engines and propellers is very easy to operate and can be operated after two days of training. In addition, the propeller 420 may include a cylindrical duct on its outer periphery to support and protect the propeller 420 while improving the propulsion efficiency.

The propelling unit 400 can control a posture and a thrust of the vertical take-off and landing device by a pair of a propeller 420 rotating in a clockwise direction and a propeller 420 rotating in a counterclockwise direction. A control unit 200 at the center, and an internal combustion engine engine 410 composed of four or more even numbers, and a propeller 420 corresponding to the engine 410 is formed at an upper portion of the engine 410. Half of the even number of engine 410 and propeller 420 rotate in the clockwise direction and the other half in the counterclockwise direction and the forward rotation engine is rotated at a constant pitch so that the propeller 420 generates a downward air flow, The rotating engine may have an inverse pitch. In the case of a quad rotor equipped with four propellers 420, the front and rear propellers 420 rotate in a clockwise direction, and the left and right propellers 420 rotate counterclockwise. The same number of propellers 420 are turned counterclockwise to cancel the torque. In order to ascend or descend, the entire rotational speed may be increased or decreased. To tilt leftward, the rotational speed of the left propeller 420 may be lowered and the rotational speed of the right propeller 420 may be increased. Forward and reverse can be done in the same way.

The controller 200 controls the throttle valve 412 to adjust the fuel injection amount of the engine 410 to control the rotational speed of the propeller 420 to control the posture and the thrust of the vertical take-off and landing device. The rotation servo 411 receives the pulse width modulation (PWM) signal received from the control unit 200 and interlocks the rotation servo 411 and the throttle valve 412 of the vaporizer of the engine 410 to move the rotation servo 411 And adjusts the angle of the throttle valve 412 corresponding thereto. The controller 200 may control the rotation speed of the engine 410 by adjusting the angle of the throttle valve 412 to increase or decrease the fuel injected or drawn into the engine 410. The control unit 20 controls the engine 410 and controls the rotational speed of the propeller 420 provided in each engine 410 to control the ascending, descending, and flying directions of the vertical take-off and landing aircraft.

The throttle valve 412 may correspond to 0 to 90 degrees from 360 degrees (0 to 100%) of the rotation servo 411 and the throttle valve 412 may control the response characteristic of the rotation servo 411 For butterfly valve structure, 0 ~ 50% of rotation servo can be made to correspond to 0 ~ 90 degree of valve. The throttle valve 412 has a butterfly valve structure so that when it is fully opened, it is horizontally positioned with respect to the fluid flow so that it can not rotate anymore.

4 is a side view of the unmanned vertical take-off and landing aircraft according to the present invention. The fuel supply unit 500 includes a fuel cell 510 installed in the body 200 and a fuel tank 510 fixed to the frame 300, And a fuel line 520 for supplying fuel to the fuel cell. The fuel tank of the fuel supply unit 500 is installed in the body part 200 and supplies fuel to each engine 410 through the fuel line 520. The fuel cell 510 is disposed at the center of the multi-copter and the fuel is supplied to drive the plurality of engines 410 and the propeller 420, thereby increasing the flight time of the vertical take- The maximum loadable weight can be increased. By increasing the loading weight, it is possible to increase the efficiency of the control work by loading and transporting a large amount of the chemical liquid at a time.

The pesticide spraying unit 600 is installed in the body part 200 and can spray the pesticide. The pesticide spraying unit 600 includes a battery 610 installed in the body part 200, a medicine container 620 and a DC pump 640 for supplying medicine to the spray nozzle 630 from the medicine container 620. [ . ≪ / RTI > The medicine container 620 may be made of a high-strength resin material so as to be light in weight and can be easily mounted on the body 200 with a bracket. The medicine container 620 is easily detachable and can be utilized for various crops and applications. The spraying nozzle 630 can be installed on the four sides of the front, rear, left, and right sides of the nozzle unit, and can be selectively installed and sprayed, thereby facilitating the cleaning work in flight. The DC pump 640 is operated by using the power of the installed battery 610 and can operate the pump 640 according to the radio control to spray the chemical liquid. When the chemical liquid is completely injected, it can be supplemented through the stopper of the chemical container 620 or the other chemical container 620 can be installed after separating the chemical container 620.

The agricultural unmanned vertical take-off and landing aircraft according to the present invention can be remotely controlled or autopilot including a remote controller and GPS. The remote controller can remotely control the unmanned vertical takeoff and landing device. The remote controller remotely controls the flight of the vertical take-off and landing aircraft, and when the pesticide spraying unit 600 is remote-controlled and reaches a position where spraying of the chemical solution is required, the DC pump 640 is operated to spray the chemical liquid.

The GPS can confirm the position of the unmanned vertical take-off and landing device and transmit it to the control unit. It is possible to check the position of the vertical takeoff and landing gear with GPS, and it is possible to return to the departure position in case of a flight obstacle. In addition, you can set the arrival point to fly automatically to the flight path.

The propulsion unit 400 includes a starter. A starter may be provided in the opposite direction to the axis of the engine 410 and connected to the propeller. The controller 200 receives a start signal from the remote controller and transmits a current signal to the starter to activate the engine 410 by the electric motor of the starter. The starter is connected to an axis behind the engine 410 to operate electrically.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

100: body part 200:
300: frame 400: propelling unit
410: engine 411: rotation servo
412: Throttle valve 420: Propeller
500: fuel supply unit 510: fuel tank
520: Fuel line 600: Pesticide spraying unit
610: Battery 620: Pharmaceutical container
630: Spray nozzle 640: DC pump

Claims (6)

A body portion;
A control unit coupled to the body portion;
A frame, one end of which engages with the body and extends radially from the center of the body, wherein the frame is formed in two or more pairs;
A propulsion unit coupled to the other end of the frame and configured to receive and drive signals from the control unit and a propeller coupled to one end of the engine and rotated by the engine to generate a vertical thrust;
A fuel supply unit comprising a fuel tank installed in the body and a fuel line fixed to the frame and supplying fuel to each engine; And
And a pesticide spraying unit installed on the body part and spraying the pesticide. The method according to claim 1,
Wherein the control unit controls the throttle valve to adjust the fuel injection amount of the engine to control the rotational speed of the propeller to control the posture and thrust of the vertical take-off and landing aircraft. The method according to claim 1,
Wherein the propulsion unit comprises a pair of a propeller rotating in a clockwise direction and a propeller rotating in a counterclockwise direction. The method according to claim 1,
Wherein the pesticide spray unit comprises a battery installed in the body, a medicine pail, and a DC pump for supplying the medicine to the spray nozzle in the medicine pail. The method according to claim 1,
The remote control device remote-controlled by the unmanned vertical take-off and landing device
And a GPS for confirming the position of the unmanned control vertical take-off and landing device and transmitting it to the control unit, wherein remote control flight or automatic flight is possible. 6. The method of claim 5,
The propulsion unit includes a starter connected to the engine shaft in the opposite direction to which the propeller is connected. The control unit receives a start signal from the remote controller and transmits a current signal to the starter, Wherein the engine is activated.

Images