Landing protection device for disconnection and crash of unmanned aerial vehicle

Abstract

According to the landing protection device, a slow descent parachute catapult is arranged at the top of the unmanned aerial vehicle, and an air bag catapult is arranged at the bottom of the unmanned aerial vehicle; a distance sensor is arranged in the unmanned aerial vehicle. The unmanned aerial vehicle landing protection device is provided with double landing protection devices, can prevent the unmanned aerial vehicle from falling, landing and exploding after the unmanned aerial vehicle is lost, and is convenient to find after the unmanned aerial vehicle is lost.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicle (UAV) equipment, in particular to a device for protecting a UAV from loss of connection or crash. Background Art

[0002] Drones, particularly quadcopter drones, offer advantages such as simple design, compact size, and high payload capacity. They are already widely used in a variety of fields, including agriculture, photography, and military applications. However, quadcopter drones are also very fragile. Since they lack fixed wings, they rely solely on propeller lift to stay aloft. If the power runs out or the signal is lost, the propellers stop rotating and the drone plummets, potentially breaking wings or causing the drone to explode. This can lead to minor damage or even destruction, resulting in economic losses. Therefore, protecting quadcopter drones from falls is a key consideration for designers.

[0003] In existing literature, although drones can be protected by devices such as parachutes and protective airbags, they still need to be reasonably designed to open smoothly and timely. Summary of the Invention

[0004] The purpose of the utility model is to provide a drone crash protection device that has a double crash protection device, which can prevent the drone from crashing and exploding after losing contact, and at the same time facilitates the search for the drone after losing contact.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:

[0006] A device for protecting a drone from loss of contact and crashing. The device comprises a parachute ejector on the top of the drone, an airbag ejector on the bottom of the drone, and a distance sensor inside the drone.

[0007] The distance sensor can be an ultrasonic sensor, which sends ultrasonic pulses to the ground and measures the time it takes for the pulses to return to calculate the height above the ground. The processor determines whether to start the protection device based on the preset height above the ground signal and the working status signal of the drone rotor. The protection device will only be triggered when both signals meet the conditions.

[0008] The parachute box includes a box bottom plate and a box cover divided into four pieces along a square diagonal line. The box cover is movably hinged to the four sides of the box bottom plate. After the box cover is unlocked, it opens in a radiating outward direction. The parachute box accommodates and places a parachute, and the parachute is in an eye-catching color.

[0009] Torsion springs are installed at the hinged joint between the lid and the bottom plate, allowing the lid to open quickly once unlocked. The four-piece lid design allows for maximum opening, creating a more open space and reducing obstruction to the parachute opening from the box body and lid, thereby increasing the speed of parachute deployment. Two parachutes can be installed, one on each side of the box body, to minimize interference with the central locking mechanism.

[0010] At the position where the tops of the box covers are assembled, a fan-shaped buckle is provided on the inner side of each box cover, an arc-shaped convex edge is provided in the middle of each fan-shaped buckle, a T-shaped rotating pin device is connected to the center of the box bottom plate through a bearing, and the fan blade part of the T-shaped rotating pin device is provided with an arc-shaped slot whose shape matches the arc-shaped convex edge; the T-shaped rotating pin device is also connected to the box bottom plate through a torsion spring; the bottom of the straight rod of the T-shaped rotating pin device is connected to the rotating shaft of the motor through a worm gear, and the motor is powered by a power supply.

[0011] When the drone processor sends a signal, the motor rotates, and the worm on the motor shaft engages with the worm gear on the T-shaped rotating latch, driving the T-shaped rotating latch to rotate to overcome the torque of the torsion spring. The arc-shaped slot on the top fan blade of the T-shaped rotating latch is disengaged from the arc-shaped convex edge of the latch and the fan-shaped buckle, the box cover loses its restriction, and the four-piece box cover opens divergently outward.

[0012] The airbag ejector comprises an airbag box body and an airbag box cover. The upper layer of the airbag box body is a medicine storage bin filled with medicine powder and provided with an igniter. The lower layer of the airbag box body accommodates a safety airbag, which is connected to the medicine storage bin through a diaphragm.

[0013] The storage chamber is filled with a powdered drug, primarily sodium azide (NaN3). The igniter is an electrode ignition device. Electric current ignites the powder, causing a decomposition reaction, releasing a large amount of nitrogen gas that fills the airbag. The airbag pushes open the lid, creating an air cushion that protects the drone even when encountering rough, rocky, or watery terrain. The diaphragm, which can be a PVC film, seals the powder within the storage chamber.

[0014] Utility model advantages

[0015] 1. This utility model has a double ground protection device, which can prevent the drone from crashing and exploding after losing contact, and at the same time facilitate the search for the drone after it loses contact; compared with the current similar drone protection equipment, the damage rate can be reduced by 80%.

[0016] 2. The design of the four-piece parachute box cover of this utility model makes the box body light and easy to install. When it is not opened, the shape is flat and wide, which reduces flight resistance and saves energy during the normal flight of the UAV.

[0017] 3. The design of the four-piece parachute box cover of the utility model can open the parachute box to the maximum extent, increase the speed of parachute release, and improve the probability of safe landing of the drone.

[0018] 4. The design of the four-piece parachute box cover of the utility model can also increase the wind resistance of the descent when it is in the open state, thereby partially slowing down the descent speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the safety device in the released state of the utility model;

[0020] Figure 2 This is a structural diagram of the parachute box body and the box cover in the locked state;

[0021] Figure 3 This is a structural diagram of the parachute box body and the box cover in the open state;

[0022] Figure 4 This is a diagram of the internal structure of the parachute box;

[0023] Figure 5 A schematic diagram of the motion relationship between the T-shaped rotating detent and the fan-shaped slot;

[0024] Figure 6 This is a diagram of the internal structure of the airbag box;

[0025] The serial numbers and component names in the figure are: 1-UAV; 2-parachute box; 21-parachute; 22-box bottom plate; 23-box cover; 24-fan-shaped buckle; 241-arc-shaped convex edge; 25-T-shaped rotating latch; 251-arc-shaped slot; 26-torsion spring; 27-worm gear; 28-motor; 29-power supply; 31-airbag box body; 32-airbag box cover; 33-medicine storage chamber; 34-igniter; 35-airbag. DETAILED DESCRIPTION Example 1

[0026] A device for protecting a drone from loss of contact and crashing. The top of the drone 1 is provided with a parachute ejector, the bottom of the drone 1 is provided with an airbag ejector, and a distance sensor is provided inside the drone 1.

[0027] The parachute box 2 includes a box bottom plate 22 and a box cover 23 divided into four pieces along the diagonal line of a square. The box cover 23 is movably hinged to the four sides of the box bottom plate 22. After the box cover 23 is unlocked, it opens in a radially outward direction. The parachute box 2 accommodates the parachute 21.

[0028] At the position where the top of the box cover 23 is assembled with each other, a fan-shaped buckle 24 is provided on the inner side of each box cover 23, and an arc-shaped convex edge 241 is provided in the middle of each fan-shaped buckle 24. The center of the box bottom plate 22 is connected to the T-shaped rotating latch 25 through a bearing, and the fan blade portion of the T-shaped rotating latch 25 is provided with an arc-shaped slot 251 whose shape matches the arc-shaped convex edge 241; the T-shaped rotating latch 25 is also connected to the box bottom plate 22 through a torsion spring 26; the bottom of the straight rod of the T-shaped rotating latch 25 is connected to the rotating shaft of the motor (28) through a worm gear 27, and the motor 28 is powered by a power supply 29.

[0029] The airbag ejector includes an airbag box body 31 and an airbag box cover 32. The upper layer of the airbag box body 31 is a medicine storage bin 33, which is filled with medicine powder and is provided with an igniter 34; the lower layer of the airbag box body 31 accommodates a safety airbag 35, and the safety airbag 35 is connected to the medicine storage bin 33 through a diaphragm.

Claims

1. A device for protecting a drone from loss of connection and crash, characterized by: A parachute ejector is arranged on the top of the drone (1), and an airbag ejector is arranged on the bottom of the drone (1); and a distance sensor is arranged inside the drone (1).

2. The UAV loss and crash protection device according to claim 1 is characterized by: The parachute box (2) comprises a box bottom plate (22) and a box cover (23) divided into four pieces along a square diagonal line. The box cover (23) is movably hinged to the box bottom plate (22) at four sides. After the box cover (23) is unlocked, it opens in a radially outward direction. The parachute box (2) accommodates the parachute (21).

3. The UAV loss and crash protection device according to claim 2 is characterized by: At the position where the tops of the box covers (23) are joined together, a fan-shaped buckle (24) is provided on the inner side of each box cover (23), and an arc-shaped convex edge (241) is provided in the middle of each fan-shaped buckle (24). The center of the box bottom plate (22) is connected to a T-shaped rotating latch (25) through a bearing, and a fan blade portion of the T-shaped rotating latch (25) is provided with an arc-shaped slot (251) whose shape matches the arc-shaped convex edge (241); the T-shaped rotating latch (25) is also connected to the box bottom plate (22) through a torsion spring (26); the bottom of the straight rod of the T-shaped rotating latch (25) is connected to the rotating shaft of the motor (28) through a worm gear (27), and the motor (28) is provided with power through a power supply (29).

4. The UAV loss and crash protection device according to claim 1 is characterized by: The airbag ejector comprises an airbag box body (31) and an airbag box cover (32); the upper layer of the airbag box body (31) is a medicine storage bin (33), the medicine storage bin (33) is filled with medicine powder, and an igniter (34) is provided; the lower layer of the airbag box body (31) accommodates a safety airbag (35), and the safety airbag (35) is communicated with the medicine storage bin (33) through a diaphragm.

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