阅读说明：本技术 小型无人机坠落保护装置及其工作方法 (Small unmanned aerial vehicle falling protection device and working method thereof ) 是由 吴远航 李小光 朱清华 宦萍 于 2021-05-11 设计创作，主要内容包括：本发明公开了一种小型无人机坠落保护装置及其工作方法,包括：气囊、直线舵机、拉杆、隔板、气嘴、反应盒、电点火器；该保护装置的主体为反应盒。所述反应盒内分为两层,中间用一块隔板分开,上层放置叠氮化钠以及被真空压缩的气囊,下层放置硝酸钾以及二氧化硅。此外上层还有一个电点火器。所述反应盒上方设有一个气嘴。所述拉杆一端与直线舵机相连,另一端与反应盒内隔板相连,可以快速抽离隔板。所述气囊的进气孔与反应盒上的气嘴相连,气囊特制成一定的形状,充气后可将整个飞行器包裹住,工作前气囊被压缩塞在反应盒内。通过气囊保护,无人机在坠落后也不会对地面人或物造成较大损伤。(The invention discloses a small unmanned aerial vehicle falling protection device and a working method thereof, wherein the device comprises: the device comprises an air bag, a linear steering engine, a pull rod, a partition plate, an air nozzle, a reaction box and an electric igniter; the main body of the protection device is a reaction box. The reaction box is divided into two layers, the middle of the reaction box is separated by a partition plate, the upper layer is provided with sodium azide and an air bag compressed by vacuum, and the lower layer is provided with potassium nitrate and silicon dioxide. The upper layer also has an electric igniter. An air nozzle is arranged above the reaction box. One end of the pull rod is connected with the linear steering engine, and the other end of the pull rod is connected with the inner partition plate of the reaction box, so that the pull rod can be quickly pulled out of the partition plate. The air inlet of the air bag is connected with the air tap on the reaction box, the air bag is specially made into a certain shape, the whole aircraft can be wrapped after the air bag is inflated, and the air bag is compressed and plugged in the reaction box before work. Through the protection of gasbag, unmanned aerial vehicle also can not cause great damage to ground people or thing after falling.)

1. The invention discloses a falling protection device for a type unmanned aerial vehicle, which comprises: the system comprises an air bag, an unmanned aerial vehicle, a linear steering engine, a pull rod 7, a partition plate, an air nozzle, a reaction box, an electric igniter and a flight control computer comprising an unmanned aerial vehicle falling emergency module;

the unmanned aerial vehicle falling protection device comprises an unmanned aerial vehicle falling protection device main body, a reaction box, a gas bag and a gas bag, wherein the unmanned aerial vehicle falling protection device main body is a reaction box, the reaction box is arranged above the unmanned aerial vehicle and is connected through quick-release equipment such as magic tape, sodium hydride, ammonium nitrate and sulfur dioxide are arranged in the reaction box, and the gas bag is connected with the reaction box through a gas nozzle and is arranged in the reaction box;

the reaction box is internally provided with a partition plate and an electric igniter, the partition plate is connected with a pull rod, the other end of the pull rod is connected with a linear rudder, and the linear rudder is arranged on a rack.

2. A type unmanned aerial vehicle protection device that falls of claim 1, characterized in that, divide into two-layerly in the reaction box, the centre separates with the baffle, and wherein upper space big fish lower floor space, sodium azide and gasbag by vacuum compression are placed to the upper strata, and potassium nitrate and silica are placed to the lower floor.

3. The crash protection device for unmanned aerial vehicle according to claim 1, wherein the air faucet is integrated with the reaction box, one end of the air faucet is directly connected with the upper end of the reaction box, the other end of the air faucet is connected with the air bag, gas generated in the reaction box enters the air bag through the air faucet to inflate the air bag, and the air bag is completely plugged into the upper layer of the reaction box through the air faucet when the protection device is started.

4. A unmanned aerial vehicle fall protection device of claim 1, wherein the airbag is made of PA66 engineering plastic, and has good physical and mechanical properties: the strength is high, the weight is light, the friction performance is good, the elasticity is good, and the folding volume is small; suitable thermal properties: the high melting point is beneficial to the heat load generated when the capsule body is unfolded so as to effectively resist flame; high chemical stability and aging resistance; therefore, the air bag is not damaged during reaction; the air bag 1 is manufactured into a specific shape, and the unmanned aerial vehicle can be wrapped by the air bag after being inflated.

5. The unmanned aerial vehicle crash protection device of claim 1, wherein the electrical igniter is fixedly mounted on an upper layer of the reaction box and is connected with the battery on the aircraft through an electric wire.

6. The type unmanned aerial vehicle fall protection device of claim 1, wherein one end of the pull rod is fixedly connected with an inner partition plate of the reaction box, and the other end of the pull rod is connected with the linear steering engine.

7. A working method of a small unmanned aerial vehicle falling protection device is characterized by comprising the following steps:

1) when the unmanned aerial vehicle is out of control due to mechanical failure and cannot be corrected through flight control, and when the attitude angle of the unmanned aerial vehicle exceeds a limit angle and is about to crash, the emergency module in the flight control automatically starts emergency operation, drives the electric igniter to ignite, and simultaneously drives the linear steering engine to rapidly pull the partition plate to enable chemical substances in the reaction box to contact and react to generate nitrogen so as to inflate the air bag;

2) the air bag is made of a material with specific high temperature resistance and excellent mechanical property, is cut into a specific shape, and wraps the unmanned aerial vehicle after being inflated;

3) thereby unmanned aerial vehicle falls to the ground the in-process because the great windward area of gasbag produces great resistance and reduces unmanned aerial vehicle and fall to the ground speed, simultaneously through the gasbag protection, reduces or even avoids unmanned aerial vehicle to the damage of ground personnel and property, reduces unmanned aerial vehicle's damage degree simultaneously.

Technical Field

The invention belongs to the technical field of aviation, and particularly relates to a small unmanned aerial vehicle falling protection device and a working method thereof.

Background

In recent years, due to the world spread of unmanned aerial vehicles such as those in the world, small unmanned aerial vehicles flying in the air are often seen in cities and tourist sites. Generally, such consumer-grade unmanned aerial vehicles all fly above places with dense personnel or dense ground buildings, and once the unmanned aerial vehicles are out of control and crashed due to mechanical failure, secondary damage to people and objects on the ground is very likely to be caused. Therefore, the safe landing technology of the unmanned aerial vehicle after being out of control has great market prospect. Whereas the prior art has mainly focused on making the drone fall to the ground at low speed by ejecting a parachute. Although the method can cause damage to the personnel and articles on the ground after the unmanned aerial vehicle lands on the ground, the unmanned aerial vehicle directly collides with the ground when the unmanned aerial vehicle lands on the ground, and the unmanned aerial vehicle is easy to further damage due to certain speed, especially the airborne camera is easy to damage. In addition, if unmanned aerial vehicle falls on the surface of water, unmanned aerial vehicle will sink into the bottom, is difficult to salvage. In addition, at present, for the problem, the existing solution is too single and lacks of technical diversity.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a small unmanned aerial vehicle falling protection device and a working method thereof. Thereby enabling the aircraft to fall safely to the ground or water. Through the protection of gasbag, unmanned aerial vehicle also can not cause great damage to ground people or thing after falling.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the invention discloses a falling protection device for a type unmanned aerial vehicle, which comprises: the device comprises an air bag, a linear steering engine, a pull rod, a partition plate, an air nozzle, a reaction box and an electric igniter;

the unmanned aerial vehicle falling protection device main part is the reaction box. The reaction box is arranged above the unmanned aerial vehicle and is connected through quick-release equipment such as a magic tape;

the reaction box is divided into two layers, the middle of the reaction box is separated by a partition plate, and the space of the upper layer is larger. The upper layer is provided with sodium azide and a vacuum compressed air bag, and the lower layer is provided with potassium nitrate and silicon dioxide;

the gas bag is characterized in that the gas nozzle and the reaction box are integrated, one end of the gas nozzle is directly connected with the upper end of the reaction box, the other end of the gas nozzle is connected with the gas bag, gas generated in the reaction box enters the gas bag through the gas nozzle to expand the gas bag, and the gas bag is completely plugged into the upper layer of the reaction box through the gas nozzle when the protection device is started;

the air bag is made of PA66 engineering plastics and has good physical and mechanical properties: high strength, light weight, good friction performance, good elasticity and small folding volume. Suitable thermal properties: the high melting point is beneficial to the heat load generated when the capsule is unfolded, so that the fire is effectively retarded. High chemical stability and ageing resistance. The air bag is manufactured into a specific shape, and the unmanned aerial vehicle can be wrapped by the air bag after being inflated;

the electric igniter is fixedly arranged on the upper layer of the reaction box and is connected with the battery on the aircraft through an electric wire;

one end of the pull rod is fixedly connected with the inner partition plate of the reaction box, and the other end of the pull rod is connected with the linear steering engine;

the steering engine is arranged on a rack of the unmanned aerial vehicle, and the mounting position of the steering engine depends on the structure of the unmanned aerial vehicle, so that the pull rod is ensured to have enough stroke;

the working method of the invention comprises the following steps:

when the unmanned aerial vehicle is out of control in mechanical failure, the unmanned aerial vehicle attitude angle exceeds the limit angle and is about to crash when the unmanned aerial vehicle cannot be corrected through flight control. The emergency module automatically starts emergency operation in flight control, drives the electric igniter to ignite, and simultaneously drives the linear steering engine to rapidly pull the partition plate to enable chemical substances in the reaction box to contact and react to generate nitrogen so as to inflate the air bag. The gasbag is made by specific high temperature resistant, the material that mechanical properties is good, cuts to have specific shape, wraps up unmanned aerial vehicle after aerifing. Thereby unmanned aerial vehicle falls to the ground the in-process because the great windward area of gasbag produces great resistance and reduces unmanned aerial vehicle and fall to the ground speed, simultaneously through the gasbag protection, reduces or even avoids unmanned aerial vehicle to the damage of ground personnel and property, reduces unmanned aerial vehicle's damage degree simultaneously.

The invention has the beneficial effects that:

(1) when the unmanned aerial vehicle cannot be corrected through flight control after mechanical failure is out of control, and the unmanned aerial vehicle is about to crash when the attitude angle of the unmanned aerial vehicle exceeds a limit angle, the air bag is inflated to wrap the unmanned aerial vehicle. The whole windward area of parcel back gasbag is big, has great resistance, makes unmanned aerial vehicle fall to the ground with slower speed. In addition, because the gasbag protection, unmanned aerial vehicle also can not produce serious secondary damage to ground.

(2) When the unmanned aerial vehicle falls into the water surface, the unmanned aerial vehicle can be attached to the water surface due to buoyancy of the air bag, so that the unmanned aerial vehicle is convenient to disturb, and further damage caused by water inflow of the unmanned aerial vehicle is reduced.

Drawings

FIG. 1 is a schematic representation of the invention after start-up;

FIG. 2 is a schematic diagram of the overall configuration of the present invention before start-up;

FIG. 3 is a schematic view of the inside of the reaction cassette of the present invention;

in the figure, 1-an air bag, 2-an unmanned aerial vehicle, 3-an air nozzle, 4-a linear steering engine, 5-a reaction box, 6-a partition plate, 7-a pull rod and 8-an electric igniter.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

Referring to fig. 1-3, the invention discloses a falling protection device for an unmanned aerial vehicle, which comprises: the device comprises an air bag 1, an unmanned aerial vehicle 2, a linear steering engine 4, a pull rod 7, a partition plate 6, an air tap 3, a reaction box 5 and an electric igniter 8;

the unmanned aerial vehicle falling protection device main part is reaction box 5. The reaction box 5 is arranged above the unmanned aerial vehicle 2 and is connected through quick-release equipment such as a magic tape;

the reaction box 5 is divided into two layers, the middle of the reaction box is separated by a partition plate 6, and the upper layer space is larger. The upper layer is provided with sodium azide and a vacuum compressed air bag 1, and the lower layer is provided with potassium nitrate and silicon dioxide;

the gas nozzle 3 and the reaction box 5 are integrated, one end of the gas nozzle is directly connected with the upper end of the reaction box 5, the other end of the gas nozzle is connected with the gas bag 1, gas generated in the reaction box 5 enters the gas bag 1 through the gas nozzle 3 to expand the gas bag 1, and the gas bag 1 is completely plugged into the upper layer of the reaction box 5 through the gas nozzle 3 when the protection device is started;

the air bag 1 is made of PA66 engineering plastics and has good physical and mechanical properties: high strength, light weight, good friction performance, good elasticity and small folding volume. Suitable thermal properties: the high melting point is beneficial to the heat load generated when the capsule is unfolded, so that the fire is effectively retarded. High chemical stability and ageing resistance. The airbag 1 is therefore not damaged during the reaction; the air bag 1 is manufactured into a specific shape, and the unmanned aerial vehicle 2 can be wrapped by the air bag after being inflated;

the electric igniter 8 is fixedly arranged on the upper layer of the reaction box 5 and is connected with the battery on the aircraft through an electric wire;

one end of the pull rod 7 is fixedly connected with the inner partition plate 6 of the reaction box 5, and the other end of the pull rod is connected with the linear steering engine 4;

the linear steering engine 4 is arranged on a rack of the unmanned aerial vehicle 2, the installation position of the linear steering engine is determined according to the structure of the unmanned aerial vehicle, the enough stroke of the pull rod is ensured, and the linear steering engine 4 is automatically controlled by flight control;

the working method of the invention comprises the following steps:

when the unmanned aerial vehicle is out of control in mechanical failure, the unmanned aerial vehicle attitude angle exceeds the limit angle and is about to crash when the unmanned aerial vehicle cannot be corrected through flight control. The emergency module automatically starts emergency operation in flight control, drives the electric igniter to ignite, and simultaneously drives the linear steering engine to rapidly pull the partition plate to enable chemical substances in the reaction box to contact and react to generate nitrogen so as to inflate the air bag. The gasbag is made by specific high temperature resistant, the material that mechanical properties is good, cuts to have specific shape, wraps up unmanned aerial vehicle after aerifing. Thereby unmanned aerial vehicle falls to the ground the in-process because the great windward area of gasbag produces great resistance and reduces unmanned aerial vehicle and fall to the ground speed, simultaneously through the gasbag protection, reduces or even avoids unmanned aerial vehicle to the damage of ground personnel and property, reduces unmanned aerial vehicle's damage degree simultaneously.

While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.