CN111619810A - Airbag device for unmanned aerial vehicle - Google Patents

Abstract

The application provides an airbag device for an unmanned aerial vehicle, comprising: a silo body fixed on the bottom of the unmanned aerial vehicle body, and the interior of the silo body is provided with a gas transmission component, an acceleration sensor and a processor; wherein the processor is respectively connected with The acceleration sensor and the gas transmission component are electrically connected; the airbag storage piece is fixed on the side wall of the silo body, the airbag storage piece is provided with a accommodating cavity, and the end of the airbag storage piece away from the silo body is provided with a slit elastic The slotted elastic body has a closed state without force and an open state under force; a through slot is provided in the slotted elastic body, and the through slot communicates with the accommodating cavity; the airbag arranged in the accommodating cavity, the airbag The air inlet of the silo is communicated with the air delivery component in the silo. When the airbag is not inflated, the slotted elastic body will not be subjected to the impact force generated by the popping of the airbag, so it is in a closed state, and the airbag storage part is sealed to prevent dust or rainwater from entering the airbag storage part.

Description

Airbag device for unmanned aerial vehicle

technical field

The invention relates to the technical field of airbags, in particular to an airbag device of an unmanned aerial vehicle.

Background technique

Unmanned aerial vehicle, referred to as "UAV", is an unmanned aircraft operated by radio remote control equipment and self-provided program control device. Unmanned aerial vehicle is actually a general term for unmanned aerial vehicle, which can be divided into: unmanned fixed-wing aircraft, unmanned vertical take-off and landing aircraft, unmanned airship, unmanned helicopter, unmanned multi-rotor aircraft, unmanned Paragliders etc.

At present, drones have been greatly developed, and are optimistic about both the professional market and the consumer market. The development of multi-rotor unmanned aerial vehicles is even more rapid, because the advancement of related electronic technologies has made the cost of such aircraft rapidly reduce, and at the same time, the safety has been rapidly improved. However, during the flight of a small unmanned aerial vehicle, the malfunction of any part or link may cause the aircraft to lose control and crash, thereby causing damage to the body itself and the airborne equipment. Some unmanned aerial vehicles are equipped with parachutes at the top of the body, often When a drone crashes at a high altitude, the bottom of the body or the wing usually falls to the ground first, resulting in poor protection of the parachute.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the present invention provides an airbag device for an unmanned aerial vehicle, comprising: a silo body fixed on the bottom of the unmanned aerial vehicle body, the interior of the silo body is provided with a gas transmission component and an acceleration sensor and a processor; wherein the processor is electrically connected to the acceleration sensor and the gas delivery assembly respectively; an airbag storage part, the airbag storage part is fixed on the side wall of the bin body, and the airbag stores A accommodating cavity is arranged in the component, and an end of the airbag storage component away from the bin body is provided with a slit elastic body, and the slit elastic body has a closed state without force and an open state with force A through slot is provided in the slotted elastic body, the through slot communicates with the accommodating cavity, and the diameter of the through slot gradually increases along the direction close to the silo body; it is arranged in the accommodating cavity The airbag inside the airbag is communicated with the air delivery component in the bin.

Applying the technical solution of this embodiment, the silo body is installed on the bottom of the drone body by means of a buckle, the gas transmission component in the silo body is communicated with the air inlet of the airbag, and the acceleration sensor is used to obtain the acceleration in the vertical direction of the drone. , the processor is electrically connected to the acceleration sensor, so that the processor can receive the acceleration value in the vertical direction of the UAV conveyed by the acceleration sensor in real time, and when the acquired acceleration value reaches the preset threshold, the processor controls the electrical connection with the processor The gas delivery component of the drone performs gas delivery work, so that the airbag is inflated, and then the airbag is ejected from the accommodating cavity through the through groove to protect the body and wings of the drone.

Wherein, when the airbag is not inflated, the slotted elastic body disposed at the end of the airbag storage member away from the bin body will not be subjected to the impact force generated by the popping of the airbag, so that it is in a closed state, so that the airbag storage member is sealed and avoids Dust or rainwater enters into the airbag storage part, thereby effectively improving the practicability of the airbag storage part. When the airbag is inflated, the slitted elastic body will be subjected to the impact force generated by the pop-up of the airbag, and then the slitted elastic body will be in an open state, making the The air bag can extend outward in the direction of the through groove.

In addition, the diameter of the through groove gradually increases along the direction close to the silo body, and the connection with the accommodating cavity is the maximum diameter of the through groove, which can prevent impurities in the environment from being easily squeezed out of the open gap due to the small thickness of the slotted elastomer. The elastic body, entering the airbag storage member and the excessive thickness of the slotted elastic body cause the impact force generated by the popping of the airbag to be unable to squeeze the slotted elastic body.

In some embodiments of the present invention, the diameter of the accommodating cavity gradually increases along the direction away from the cartridge body. In this way, the airbag in the inflated state can be guided, so that the airbag can be easily ejected.

Specifically, the diameter a of the airbag is smaller than the minimum distance b between the two wings of the drone.

Since the air bag is inflated and popped out in a very short period of time, the wings of the drone may still be rotating. With this structural design, when the air bag is inflated and in a maximized state, the diameter of the air bag is a. If it is smaller than the minimum distance b between the two wings of the drone, it can avoid the contact between the air bag and the rotating wing, causing the rotating wing to be hindered by the air bag and break.

The maximum distance c from the airbag to the body is greater than the maximum distance e from the wing to the body. In this way, when the drone laterally contacts the ground, the airbag can first contact the ground, so that the wing can be protected, and the use effect of the airbag can be effectively improved.

Regarding the specific structure of the gas delivery assembly, the gas delivery assembly includes a carbon dioxide compression bottle, a five-way joint, a gas delivery pipe and a solenoid valve; one end of the gas delivery pipe is communicated with the carbon dioxide compression bottle through the five-way joint, and the other end is connected to the carbon dioxide compression bottle. It is threadedly connected with the air inlet of the airbag; the solenoid valve is arranged on the pipeline connecting the carbon dioxide compression bottle and the five-way joint. The solenoid valve is electrically connected with the processor, so that the processor can control the opening and closing of the solenoid valve. When the gas needs to be delivered, the processor controls the solenoid valve to be in an open state, and the carbon dioxide in the carbon dioxide compression bottle enters the four and The air delivery pipe connected with the airbag realizes the effect of inflating the airbag arranged in the circumferential direction of the drone body.

In some embodiments of the present invention, one end of the carbon dioxide compression bottle and the five-way joint is connected to the silo body through a platform, and the other end is mounted on the inner wall of the silo body through a fastening cap. In this way, stable support for the carbon dioxide compression bottle is achieved.

For the specific structure of the air bag, the air bag includes an outer layer bag body and an inner layer bag body; the inner layer bag body is communicated with the air inlet; the outer layer bag body is wrapped on the inner layer bag body, And the inner wall of the outer layer bag body is fixedly connected with the outer wall of the inner layer bag body near the air inlet. In this way, the impact resistance of the airbag in a gas-filled state can be improved by adopting the airbag of the inner and outer double-layer structure.

Specifically, a gap is provided between the inner wall of the outer layer bag body on the side away from the air inlet and the outer wall of the outer layer bag body. The outer wall of the inner layer bladder is provided with a ventilation hole, and the ventilation hole is communicated with the inner wall of the outer layer bladder.

When the impact force of the falling of the drone is too large, the gas-filled airbag is easy to rebound, thereby causing the problem of rollover. When the impact force is too large, the outer layer bag will be damaged, so that the inner bag body can achieve the effect of deflation, thereby reducing the rebound force received by the air bag and avoiding the problem of rollover.

The airbag device of the unmanned aerial vehicle provided by the present invention has the following beneficial effects:

1. A slotted elastic body is arranged at the end of the airbag storage member away from the bin body. When the airbag is not inflated, the slotted elastic body will not be subjected to the impact force generated by the pop-up of the airbag, so it is in a closed state and realizes the operation of the airbag storage member. It is airtight to prevent dust or rainwater from entering into the airbag storage part, which effectively improves the practicability of the airbag device.

2. The use of the appropriate airbag design size can effectively improve the use effect of the airbag.

3. The inner and outer double-layered airbags are used to fill the inner and outer airbags with gas respectively. When the impact force is too large, the outer layer of airbags will be damaged, so that the inner airbags will achieve the effect of deflation, thereby reducing the impact on the air. The rebound force of the airbag can avoid the problem of secondary damage to the drone caused by rollover.

Description of drawings

1 is an overall schematic diagram of an airbag device for a drone according to an embodiment of the present invention (the airbag is not popped up);

2 is an overall schematic diagram of an airbag device for a drone according to an embodiment of the present invention (the airbag is ejected);

FIG. 3 is a state schematic diagram of an airbag device of an unmanned aerial vehicle according to an embodiment of the present invention;

FIG. 4 is a schematic state diagram of another airbag device of an unmanned aerial vehicle according to an embodiment of the present invention;

FIG. 5 is an internal partial structure diagram of the body of an airbag device of an unmanned aerial vehicle according to an embodiment of the present invention;

6 is an internal structural diagram of an airbag storage member of an airbag device of an unmanned aerial vehicle according to an embodiment of the present invention;

Fig. 7 is the enlarged view at the A place of Fig. 6;

8 is a side view of an airbag storage member of an airbag device of an unmanned aerial vehicle according to an embodiment of the present invention;

FIG. 9 is a structural diagram of an airbag of an airbag device of an unmanned aerial vehicle according to an embodiment of the present invention.

Wherein, the above-mentioned drawings include the following reference signs:

10. Bin body; 11. Carbon dioxide compression bottle; 12. Fastening cover; 13. Five-way joint; 14. Air pipe; 15. Solenoid valve; 16. Acceleration sensor; 17. Processor; 20. Airbag storage part; 21 , accommodating cavity; 22, slit elastomer; 2201, through groove; 30, air bag; 31, outer layer bag body; 32, inner layer bag body.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related invention, but not to limit the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Referring to FIG. 1 , it shows an overall schematic diagram of an airbag device of an unmanned aerial vehicle according to an embodiment of the present application when the airbag is not ejected.

As shown in FIG. 1 , the silo body 10 is installed on the bottom of the drone body by means of snap-fit installation, and four airbag storage parts 20 are fixed along the periphery of the silo body 10 by means of injection molding respectively. The airbags 30 are folded by It is placed in the accommodating cavity 21 of the airbag storage member 20 in the manner of .

Referring to FIG. 2 , it shows an overall schematic diagram of an airbag device of an unmanned aerial vehicle after the airbag is ejected according to an embodiment of the present application.

As shown in FIG. 2 , the air inlet of the airbag 30 is communicated with the air delivery component of the bin body 10 , and by inflating the airbag 30 , the airbag 30 can be ejected from the airbag storage member 20 .

Referring to FIG. 3 , it shows a state schematic diagram of the wing of the unmanned aerial vehicle according to an embodiment of the present application.

As shown in FIG. 3 , since the inflation and opening of the airbag 30 is completed in a very short period of time, the wings of the drone may still be rotating at this time. When the airbag 30 is inflated and in a maximized state, the airbag The diameter a of the 30 is smaller than the minimum distance b between the two wings of the drone, which can prevent the airbag 30 from contacting the rotating wing, causing the rotating wing to be hindered by the airbag 30 and break.

Referring to FIG. 4 , it shows another state schematic diagram of the wing of the unmanned aerial vehicle according to an embodiment of the present application.

As shown in FIG. 4 , the maximum distance c from the airbag 30 to the body is greater than the maximum distance e from the wing to the body. In this way, when the drone laterally contacts the ground, the airbag 30 can first contact the ground, so that the wing can be protected, and the use effect of the airbag 30 can be effectively improved.

Further, please refer to FIG. 5 , which shows a structural diagram of an internal part of the body of an airbag device for an unmanned aerial vehicle of the present application.

As shown in FIG. 5 , a gas delivery assembly, an acceleration sensor 16 and a processor 17 are arranged inside the bin body 10. The gas delivery component includes a carbon dioxide compression bottle 11, a five-way joint 13, a gas delivery pipe 14 and a solenoid valve 15; the gas delivery pipe 14 One end is connected with the carbon dioxide compression bottle 11 through the five-way joint 13 , and the other end is threadedly connected with the air inlet of the airbag 30 ;

The processor 17 is electrically connected to the acceleration sensor 16 and the solenoid valve 15 respectively.

The acceleration sensor 16 of the model JY-61 is used to obtain the acceleration in the vertical direction of the drone, and the processor 17 of the model AMDfx8300 is electrically connected to the acceleration sensor 16, so that the processor 17 can receive the acceleration sensor 16 in real time to convey unmanned aerial vehicles. The electromagnetic valve 15 of the model 2W-160-15 is electrically connected to the processor 17, so that the processor 17 can control the opening and closing of the electromagnetic valve 15, when the acquired acceleration value reaches the preset threshold value At this time, the processor 17 controls the solenoid valve 15 to be in an open state, and the carbon dioxide in the carbon dioxide compression bottle 11 enters the four air pipes 14 connected with the air bag 30 through the five-way joint 13, so that the air bag 30 is inflated, and then the air bag 30 is discharged from the air bag 30. The airbag storage member 20 is ejected to protect the body and wings of the drone.

As shown in FIG. 6 , the airbag 30 is placed in the accommodating cavity 21 by folding. When the airbag 30 is not inflated, the slotted elastic body 22 provided at the end of the airbag storage member 20 away from the silo body 10 will not be affected by the ejection of the airbag 30 . Therefore, it is in a closed state, realizing the sealing of the airbag storage member 20, preventing dust or rainwater from entering the airbag storage member 20, thereby effectively improving the practicability of the airbag storage member 20. When the airbag 30 is inflated, the opening The slit elastic body 22 will be subjected to the impact force generated by the pop-up of the airbag 30 , and then the slitted elastic body 22 will be in an open state, so that the airbag 30 can extend outward along the direction of the through groove 2201 .

As shown in FIGS. 7 and 8 , the diameter of the through groove 2201 gradually increases in the direction close to the silo body 10 , and the connection with the accommodating cavity 21 is the maximum diameter of the through groove 2201 , which can prevent the thickness of the slotted elastic body 22 from being excessively thick. The small size causes impurities in the environment to easily squeeze the slotted elastic body 22 , and the impact force generated by the pop-up of the airbag 30 cannot squeeze the slotted elastic body 22 when it enters the airbag storage member 20 and the slotted elastic body 22 is too thick.

As shown in FIG. 9 , the air bag 30 includes an outer layer bag body 31 and an inner layer bag body 32; the inner layer bag body 32 is communicated with the air inlet; the outer layer bag body 31 is wrapped on the inner layer bag body 32, and the outer layer bag body 32 is The inner wall of the body 31 is fixedly connected with the outer wall of the inner layer bladder 32 close to the air inlet. In this way, the impact resistance of the airbag 30 in the gas-filled state can be improved by adopting the airbag 30 having the inner and outer double-layer structure.

Specifically, a gap is provided between the inner wall of the side of the outer layer bag body 31 away from the air inlet and the outer wall of the outer layer bag body 31 . The outer wall of the inner layer bag body 32 is provided with a ventilation hole, and the ventilation hole is communicated with the inner wall of the outer layer bag body 31 .

When the impact force of the falling of the drone is too large, the airbag 30 filled with gas is easy to rebound, thereby causing the problem of rollover. The airbag 30 of the present invention adopts an inner and outer double-layer structure, so that the gas fills the inner layer bag 32 and the outer layer respectively. As for the bladder 31, when the impact force is too large, the outer bladder 31 will be damaged, so that the inner bladder 32 achieves the effect of deflation, thereby reducing the rebound force of the bladder 30 and avoiding the problem of rollover.

In a specific embodiment, the landing of the drone is simulated by the drone at a height of 1.6m. When the vertical acceleration of the ^drone is 5m/s when landing, the outer layer capsule 31 with a tear strength of N10 Tear occurs.

The above are just some embodiments of the invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention.

Claims (9)

1. An unmanned aerial vehicle's air bag device, its characterized in that includes:

the unmanned aerial vehicle comprises a cabin body (10) fixedly arranged on the bottom of an unmanned aerial vehicle body, wherein an air transmission assembly, an acceleration sensor (16) and a processor (17) are arranged in the cabin body (10);

the processor (17) is electrically connected with the acceleration sensor (16) and the gas transmission assembly respectively;

the air bag storage part (20) is fixed on the side wall of the bin body (10), an accommodating cavity (21) is formed in the air bag storage part (20), a slit elastic body (22) is arranged at one end, away from the bin body (10), of the air bag storage part (20), and the slit elastic body (22) has an unstressed closed state and a stressed open state;

a through groove (2201) is arranged in the slotted elastomer (22), the through groove (2201) is communicated with the accommodating cavity (21), and the diameter of the through groove (2201) is gradually increased along the direction close to the bin body (10);

the air bag (30) is arranged in the accommodating cavity (21), and an air inlet of the air bag (30) is communicated with the air conveying assembly in the bin body (10).

2. The device according to claim 1, characterized in that said housing cavity (21) has a diameter that increases progressively in a direction away from said cartridge body (10).

3. The device according to claim 1, characterized in that the diameter a of the balloon (30) is smaller than the minimum separation b of the two wings of the drone.

4. The device according to claim 1, characterized in that the maximum distance c of the balloon (30) from the body is greater than the maximum distance e of the wing from the body.

5. The device according to claim 1, wherein the gas transmission assembly comprises a carbon dioxide compression bottle (11), a five-way joint (13), a gas transmission pipe (14) and an electromagnetic valve (15);

one end of the gas transmission pipe (14) is communicated with the carbon dioxide compression bottle (11) through the five-way joint (13), and the other end of the gas transmission pipe is in threaded connection with the gas inlet of the gas bag (30);

the electromagnetic valve (15) is arranged on a pipeline connecting the carbon dioxide compression bottle (11) and the five-way joint (13).

6. The device according to claim 5, characterized in that said carbon dioxide compression bottle (11) and said five-way union (13) are connected to said cartridge body (10) by means of a bearing platform at one end and are mounted on the inner wall of said cartridge body (10) by means of a fastening cover (12) at the other end.

7. The device according to claim 1, wherein said balloon (30) comprises an outer bladder (31) and an inner bladder (32);

the inner bladder (32) is communicated with the air inlet;

the outer-layer balloon body (31) is wrapped on the inner-layer balloon body (32), and the inner wall of the outer-layer balloon body (31) is fixedly connected with the outer wall of one side, close to the air inlet, of the inner-layer balloon body (32).

8. A device according to claim 7, wherein a gap is provided between the inner wall of the outer bladder (31) on the side remote from the inlet port and the outer wall of the outer bladder (31).

9. The device according to claim 7, characterized in that the outer wall of the inner bladder (32) is provided with ventilation holes which are communicated with the inner wall of the outer bladder (31).

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