Auxiliary multi-functional airbag system for fast trans-medium vehicle

Abstract

The application relates to a multifunctional airbag system for assisting a cross-medium vehicle to quickly cross media, which is suitable for a rotary-wing cross-medium vehicle and comprises an airbag buffer device, an airbag ballast device and a multi-airbag air volume unified control module. The airbag buffer device is arranged at the head of the cross-medium vehicle, the airbag ballast device is arranged at the middle section of the cross-medium vehicle, and the multi-airbag air volume unified control module is arranged at the tail of the cross-medium vehicle. The cross-medium vehicle is provided with three functions of underwater attitude adjustment, high-speed water entry buffering and rapid water exit assisting, the airbag ballast device replaces a traditional ballast water system, the inflation amount of the ballast airbag and the propeller power are controlled, and the functions of the cross-medium vehicle in underwater attitude adjustment, such as floating, diving and rotating, and the function of zero-energy consumption suspension in water can be realized.

Description

Technical Field

[0001] This invention relates to the field of cross-medium vehicle design, and more specifically, to a multifunctional airbag system that assists cross-medium vehicles in rapid cross-medium travel. Background Technology

[0002] A cross-medium vehicle is a new concept vehicle capable of both underwater navigation and aerial flight. It integrates key technologies from aerial unmanned aerial vehicles (UAVs) and underwater submersibles, offering advantages such as high stealth, strong autonomy, and flexible operation. In the marine environment, cross-medium vehicles can be widely used in military reconnaissance, scientific research, environmental monitoring, and maritime rescue, demonstrating vigorous vitality and enormous potential.

[0003] Airbags are widely used in many fields due to their lightweight, flexibility, and excellent shock absorption and energy absorption properties. In the automotive industry, airbags serve as an important safety device to protect drivers and passengers during collisions; in the aerospace industry, airbags are used during the landing process of spacecraft to reduce landing impact and protect astronauts; in water sports equipment, airbags are used in life jackets and floats to provide buoyancy and protection.

[0004] The main characteristic of cross-medium vehicles is their ability to navigate underwater and fly in the air. Therefore, in the design process, in addition to considering the safety and efficiency of navigation in both attitudes, it is also necessary to take into account the safety and efficiency during entry and exit from the water. To improve the maneuverability and stealth of cross-medium vehicles, the viscosity of water and air at room temperature differs by about 55 times, and their density by about 800 times. This huge difference in medium properties means that UAVs and vehicles not only differ in design but also in their navigation states in their respective media. Therefore, this factor must be fully considered in the structural design of cross-medium vehicles. In addition, the difference in medium properties also has a significant impact on the entry and exit of cross-medium vehicles from the water. For example, the vehicle generates a huge impact force during high-speed entry into the water, and the vehicle needs to provide a large amount of power to overcome the constraints of water surface tension when exiting the water. These influencing factors necessitate that the structural design of cross-medium vehicles should reasonably consider functions such as underwater attitude adjustment, high-speed water entry buffering, and rapid water exit assistance.

[0005] The design of cross-medium vehicles needs to consider three functions: underwater attitude adjustment, high-speed water entry buffer, and rapid water exit assist. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a multi-functional airbag system that assists cross-medium vehicles in rapid cross-medium travel. The system integrates ballast airbags, UAV soft landing airbags, and buoyancy-assisted salvage airbags into a single design, forming a multi-functional integrated airbag system suitable for rapid cross-medium vehicles. This enables cross-medium vehicles to have functions such as underwater attitude adjustment, high-speed water entry buffering, and rapid water exit assistance.

[0007] The technical solution adopted by the present invention to solve its technical problem is: to construct a multi-functional airbag system to assist a cross-medium vehicle in rapid cross-medium travel, characterized in that it includes an airbag buffer device, an airbag ballast device, and a multi-airbag air volume unified control module. The airbag buffer device is located at the head of the cross-medium vehicle, the airbag ballast device is located in the middle section of the cross-medium vehicle, and the multi-airbag air volume unified control module is located at the tail of the cross-medium vehicle.

[0008] According to the above scheme, the airbag buffer device includes a buffer airbag, a guide rail, a slider, a pressure plate, a sliding hatch, and a water divider. When the vehicle is in a horizontal attitude, the head of the buffer airbag is set at the front end of the sliding hatch via a pressure ring, and the tail of the buffer airbag is fixedly set on the pressure plate via a slider. The pressure plate is set on the water divider, and the slider is set on the guide rail. The buffer airbag is used to alleviate the impact load on the vehicle during high-speed water entry. The pressure plate is used to limit the buffer airbag, and the guide rail is used to limit the sliding of the sliding hatch. The sliding hatch can slide on the water divider and is used to limit the shape of the buffer airbag and provide a sealed internal environment for the vehicle. The water divider is used to reduce the impact of the vehicle entering the water across a medium and the underwater navigation resistance.

[0009] According to the above scheme, there are four guide rails and four sliders, and the four guide rails are evenly arranged inside the sliding hatch.

[0010] According to the above scheme, the airbag ballast device includes a ballast airbag, a clamping frame, an inner shell, and an outer shell; the ballast airbag is fixedly mounted on the inner shell through the clamping frame, and the ballast airbag is located between the inner shell and the outer shell when it is not inflated. The inner shell and the outer shell are connected by bolts, and the outer shell is provided with a slot for releasing the ballast airbag; the ballast airbag is used to protect and adjust the underwater navigation attitude of the vehicle and assist the vehicle in quickly emerging from the water, and the inner shell is used to provide a sealed internal environment for the vehicle.

[0011] According to the above scheme, there are four ballast airbags, four clamping frames and four slots. The ballast airbags are evenly arranged on the outer side of the inner shell, and the slots on the outer shell correspond one-to-one with the ballast airbags.

[0012] According to the above scheme, the airbag adjustment device includes an air pump and a high-pressure gas tank; the air pump is located on top of the high-pressure gas tank, and the high-pressure gas tank is located at the tail of the vehicle; the air pump is used to control the gas flow in the airbag system, and the high-pressure gas tank is used to store high-pressure gas.

[0013] According to the above scheme, four high-pressure gas tanks are provided, and the four high-pressure gas tanks are evenly distributed at the tail of the vehicle.

[0014] The multi-functional airbag system for rapid cross-medium navigation of the present invention, which implements the present invention, has the following features:

[0015] Beneficial effects:

[0016] 1. The present invention is equipped with an airbag buffer device, an airbag ballast device and a multi-airbag air volume unified control module, and adopts an integrated structure and functional design, enabling the cross-medium vehicle to have three functions: underwater attitude adjustment, high-speed water entry buffer and rapid water exit assist.

[0017] 2. This invention enables cross-medium vehicles to have ballast functions under the premise of small size, realize underwater attitude adjustment functions like those of a submarine. The airbag ballast device replaces the traditional ballast water system. By controlling the inflation of the ballast airbag and the propeller power, the cross-medium vehicle can realize underwater attitude adjustment functions such as surfacing, diving and rotating, as well as the function of zero-energy water suspension.

[0018] 3. Under the dual buffer protection of the buffer airbag and the ballast airbag, this invention not only realizes the function of buffering the high-speed water entry of the cross-medium vehicle, but also improves its water entry efficiency and risk avoidance capability. When the cross-medium vehicle is subjected to violent impact during water entry, firstly, the water distribution frame disperses the water flow in all directions with its slender structure, reducing the impact of water entry; then, the buffer airbag is passively compressed and transfers gas to the ballast airbag, realizing the first buffer protection; finally, the gas in the ballast airbag is passively compressed, realizing the second buffer protection. The three processes effectively reduce the peak pressure when the vehicle structure is subjected to water entry impact load, extend the buffer time, and realize the effective protection of the cross-medium vehicle structure.

[0019] 4. This invention uses ballast airbags to assist the cross-medium vehicle in rapidly exiting the water. When the cross-medium vehicle enters the water to a certain depth, it overcomes the water pressure and fully opens the ballast airbags, increasing the vehicle's displacement volume and thus obtaining sufficient buoyancy. Under the combined action of the ballast airbags and the propeller, a higher water exit speed can be obtained, thereby shortening the water exit time, improving water exit efficiency, and reducing water exit energy consumption. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0021] Figure 1This is a schematic diagram of the gas control and flow structure of the multi-functional airbag system for assisting rapid cross-medium navigation of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the multi-functional airbag system for assisting cross-medium vehicles to quickly cross media, as per the present invention.

[0023] Figure 3 This is a three-dimensional schematic diagram of a multi-functional airbag system that assists a cross-medium vehicle in rapidly crossing media during the underwater navigation phase, aided by this invention.

[0024] Figure 4 This is a three-dimensional schematic diagram of a multi-functional airbag system that assists a cross-medium vehicle in rapidly crossing media during the high-speed water entry phase, aided by this invention.

[0025] Figure 5 This is a three-dimensional schematic diagram of the multi-functional airbag system that assists a cross-medium vehicle in rapidly crossing media during the rapid water exit phase, aided by this invention.

[0026] Figure 6 This is a cross-sectional structural schematic diagram of the airbag buffer device of the present invention;

[0027] Figure 7 This is a partially enlarged structural schematic diagram of the airbag cushioning device of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the airbag ballast device of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the multi-airbag air volume unified control module of the present invention;

[0030] In the diagram: 301, airbag buffer device; 302, airbag ballast device; 303, multi-airbag air volume unified control module; 601, sliding hatch cover; 602, guide rail; 603, slider; 604, pressure plate; 605, buffer airbag; 606, pressure ring; 607, water distribution frame; 801, ballast airbag; 802, outer shell; 803, inner shell; 804, clamping frame; 805, slot; 901, air pump; 902, first high-pressure air tank; 903, central air pipe; 904, first air valve; 905, second air valve; 906, third air valve; 907, fourth air valve; 908, fifth air valve; 909, control terminal; 910, second high-pressure air tank; 911, third high-pressure air tank; 912, fourth high-pressure air tank. Detailed Implementation

[0031] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0032] like Figure 1-9 As shown, the multi-functional airbag system for rapid cross-medium navigation of the present invention includes an airbag buffer device, an airbag ballast device, and a unified airbag volume control module. It is suitable for rotorcraft cross-medium navigation vehicles. In a horizontal attitude, the airbag buffer device is located at the nose of the cross-medium navigation vehicle, the airbag ballast device is located in the middle section, and the unified airbag volume control module is located at the tail. The airbag buffer device, airbag ballast device, and unified airbag volume control module adopt an integrated structure and functional design, forming a multi-functional integrated airbag system suitable for rapid cross-medium navigation vehicles.

[0033] The airbag cushioning device includes an airbag 605, a guide rail 602, a slider 603, a pressure plate 604, a pressure ring 606, a sliding hatch 601, and a water divider 607. When the aircraft is in a horizontal attitude, the head of the airbag 605 is mounted on the front end of the sliding hatch 601 via the pressure ring 606, and the tail of the airbag 605 is fixed to the pressure plate 604 via the slider 603. The pressure plate 604 is mounted on the water divider 607, and the slider 603 is mounted on the guide rail 602. The airbag 605 is used to alleviate the impact of the flight path. During the high-speed, vertical entry of the vehicle into the water, the impact load is mitigated by a pressure plate 604, which restricts the airbag 605. A guide rail 602 restricts the sliding of the sliding hatch 601, which can slide on a water divider 607. The sliding hatch 601 constrains the shape of the airbag 605 and provides a sealed internal environment for the vehicle. The water divider 607 is located at the front end of the airbag buffer device. The water divider 607 has a slender structure and is used to reduce the impact of the vehicle entering the water and underwater drag. There are four guide rails 602 and sliders 603, which work together. The four guide rails 602 are evenly distributed inside the sliding hatch 601.

[0034] The ballast device includes a ballast airbag 801, a clamping frame 804, an inner shell 803, and an outer shell 802. The ballast airbag 801 is fixedly mounted on the inner shell 803 via the clamping frame 804. When deflated, the ballast airbag 801 is located between the inner shell 803 and the outer shell 802, which are connected by bolts. The outer shell 802 has a slot 805 for releasing the ballast airbag 801. The ballast airbag 801 provides secondary protection during high-speed vertical water entry, enables the switching between vertical and horizontal underwater navigation attitudes, and assists in the rapid surfacing of the vehicle. The inner shell 803 provides a sealed internal environment for the vehicle. There are four ballast airbags 801, four clamping frames 804, and four slots 805. The ballast airbags 801 are evenly distributed on the outside of the inner shell 803, and the slots 805 on the outer shell 802 correspond one-to-one with the ballast airbags 801.

[0035] The multi-airbag air volume unified control module includes an air pump 901, a first high-pressure air tank 902, a second high-pressure air tank 910, a third high-pressure air tank 911, a fourth high-pressure air tank 912, a central air pipe 903, a control terminal 909, a pressure sensor, a first air valve 904, a second air valve 905, a third air valve 906, a fourth air valve 907, and a fifth air valve 908. The air pump 901 is located on top of the first high-pressure air tank 902. All four high-pressure air tanks are located at the tail of the vehicle. The central air pipe 903 is located between the first high-pressure air tank 902, the second high-pressure air tank 910, the third high-pressure air tank 911, and the fourth high-pressure air tank 912. The control terminal 909 is located on top of the air pump 901. The air pump 901, the first air valve 904, the second air valve 905, the third air valve 906, the fourth air valve 907, and the fifth air valve 908 are used to control the gas flow within the airbag system. The first high-pressure gas tank 902, the second high-pressure gas tank 910, the third high-pressure gas tank 911, and the fourth high-pressure gas tank 912 are used to store compressed high-pressure gas. The central gas pipe 903 serves as a hub for gas flow. The control terminal 909 is used to control the air pump 901, the first air valve 904, the second air valve 905, the third air valve 906, the fourth air valve 907, and the fifth air valve 908, and to receive and process data feedback from the pressure sensor. The high-pressure gas tanks are evenly distributed at the stern of the vehicle. There are usually four high-pressure gas tanks and five air valves. The first air valve 904 is located at the first high-pressure gas tank 902. The second high-pressure air tank 910 is located between the ballast airbag 801, the second air valve 905 is located between the second high-pressure air tank 910 and the ballast airbag 801, the third air valve 906 is located between the third high-pressure air tank 911 and the ballast airbag 801, the fourth air valve 907 is located between the fourth high-pressure air tank 912 and the ballast airbag 801, and the fifth air valve 908 is located between the buffer airbag 605 and the central air pipe 903. Five pressure sensors are provided, one of which is located inside the buffer airbag 801 and the other four are located inside the ballast airbag 801. The pressure sensors are used to detect and provide feedback on the pressure inside the airbag.

[0036] The outlets of the four high-pressure gas tanks are connected to the inlet of the air pump 901 via air pipes. The outlet of the air pump 901 is connected to the head of the central air pipe 903 via air pipes. The tail of the central air pipe 903 is connected to five air valves via air pipes. The first air valve 904, the second air valve 905, the third air valve 906, and the fourth air valve 907 are connected to four ballast airbags 801 via air pipes. The fifth air valve 908 is connected to the buffer airbag 605 via air pipes.

[0037] The main processes for cross-medium vehicles to perform missions include: mission planning, takeoff, flight, water entry, underwater navigation, water exit, and recovery. This invention aims to improve the performance of cross-medium vehicles during the three continuous processes of water entry, underwater navigation, and water exit. The three functions are specifically:

[0038] Underwater Attitude Adjustment: To effectively meet the functional requirements of underwater attitude adjustment for cross-medium vehicles, and considering that cross-medium vehicles are often designed with a small size to meet high maneuverability requirements, it is inconvenient to install the ballast water system of traditional submersibles. This invention, referencing the working principle of submersible ballast water systems, specifically incorporates an airbag assembly with ballast function on the cross-medium vehicle. Utilizing the law of buoyancy, by controlling the inflation volume of the airbag, the displacement volume of the cross-medium vehicle is effectively changed, and the average density of the vehicle is controlled in real time. This eliminates the over-reliance on propellers by most current cross-medium vehicles for underwater attitude adjustment functions such as surfacing, diving, and rotation, and enables zero-energy underwater suspension.

[0039] High-Speed ​​Water Entry Buffering: To effectively meet the functional requirements of high-speed water entry buffering for cross-medium vehicles, and considering the excellent collision protection performance of airbag structures, this invention leverages its functional advantages to overcome the current inadequacy of water entry impact protection for cross-medium vehicles. Referring to the working principle of pneumatic buffers, this invention specifically incorporates a two-stage pneumatic buffering airbag assembly on cross-medium vehicles, namely, a buffer airbag 605 and a ballast airbag 801 (secondary buffer airbag). When the cross-medium vehicle experiences a violent impact upon water entry, utilizing the compressibility of gas, the gas in the buffer airbag 605 and the ballast airbag 801 is passively compressed sequentially, effectively reducing the peak pressure of the vehicle structure under the impact load, extending the buffer time, and achieving effective protection for the cross-medium vehicle structure.

[0040] Rapid Water Ejection Assistance: To effectively meet the functional requirements of rapid water ejection assistance for cross-medium vehicles, and considering the advantages of airbag structures in buoyancy performance during shipwreck salvage, this invention breaks away from the current single-method approach of cross-medium vehicles relying solely on propellers and other power units for water ejection. Referring to the working principle of salvage airbags, this invention specifically incorporates an airbag assembly with water ejection assistance on the cross-medium vehicle, effectively utilizing ballast airbags 801. When the cross-medium vehicle is submerged to a certain depth, it overcomes water pressure to fully open the ballast airbags 801, increasing the vehicle's displacement volume, reducing its average density, and thus obtaining sufficient buoyancy assistance. After sufficient underwater travel, combined with the action of the propeller, the cross-medium vehicle can achieve a higher water ejection speed, thereby achieving efficient water ejection.

[0041] When a cross-medium vehicle needs to perform underwater missions or perform emergency underwater evasion, it utilizes an airbag buffer device, a multi-airbag air volume unified control module, and an airbag ballast device to complete water entry preparation and high-speed water entry response, thereby achieving high-speed water entry buffering. During the water entry preparation phase, the control terminal 909 controls the air pump 901 to transport gas from the first high-pressure air tank 902, the second high-pressure air tank 910, the third high-pressure air tank 911, and the fourth high-pressure air tank 912 to the central air pipe 903. The fifth air valve 908 opens, and the remaining air valves close. The buffer airbag 605 rapidly inflates, and the inflated airbag causes the sliding hatch 601 to slide down. The pressure sensor inside the buffer airbag 605 monitors and provides feedback on the pressure in real time. When the pressure reaches the expected value, the control terminal 909 controls the air pump 901 to stop working. During rapid water entry... During the response phase, the vehicle enters the water vertically. The sharp shape of the water divider 607 disperses the water flow in all directions. The sliding hatch 601 slides upward due to the pressure of the water. The pressure forces the gas in the buffer airbag 605 into the central air pipe 801. Subsequently, the control terminal 909 controls the opening of the first air valve 904, the second air valve 905, the third air valve 906, and the fourth air valve 907, and the gas is transported to the four ballast airbags 801. During the process, the buffer airbag 605 provides the first buffer protection, and the ballast airbag 801 provides the second buffer protection.

[0042] When the cross-medium vehicle completes a high-speed water entry and needs to adjust to an underwater navigation attitude, it uses an airbag ballast device and a multi-airbag air volume unified control module to adjust its underwater navigation from a vertical to a horizontal attitude. First, the control terminal 909 controls the opening of the third air valve 906 and the fourth air valve 907. The air pump 901 discharges the gas in the corresponding ballast airbag 801 into the first high-pressure air tank 902, the second high-pressure air tank 910, the third high-pressure air tank 911, and the fourth high-pressure air tank 912. Subsequently, the third air valve 906 and the fourth air valve 907 close, and the first air valve 904 and the second air valve 905 open, adjusting the gas in the corresponding ballast airbag 801 so that the vehicle's weight equals its buoyancy, and its center of gravity is higher than its center of buoyancy. The vehicle rotates from a vertical water entry attitude to a horizontal underwater navigation attitude, better meeting the needs of underwater missions.

[0043] After completing its underwater mission, the cross-medium vehicle, with the help of the airbag ballast device and the unified air volume control module for multiple airbags, completes the preparation for and rapid response to water release, thereby achieving rapid water release assistance. During the water release preparation phase, the control terminal 909 controls the opening of the first air valve 904, the second air valve 905, the third air valve 906, and the fourth air valve 907. The first high-pressure air tank 902, the second high-pressure air tank 910, the third high-pressure air tank 911, and the fourth high-pressure air tank 912 use the air pump 901 to uniformly inflate the four ballast airbags 801. The pressure sensors inside the four ballast airbags 801 monitor the pressure in real time and feed it back to the control terminal 909. The cross-medium vehicle rotates from a horizontal underwater navigation attitude to a vertical rapid water release attitude. Subsequently, the propeller provides downward thrust to counteract the difference between buoyancy and gravity, maintaining a suspended state. After the ballast airbag 801 is fully inflated, it enters the rapid water-out response phase. The propeller provides upward thrust. With the hybrid power of the ballast airbag 801 and the propeller, the aircraft achieves rapid water-out assistance. During this process, the control terminal 909 needs to adjust the internal pressure of the ballast airbag 801 in real time according to the pressure data fed back by the pressure sensor to prevent the airbag from being damaged due to excessive internal pressure.

[0044] In addition to the applications mentioned above, the cross-medium vehicle can also achieve underwater suspension or floating on the water surface under numerical attitude conditions by means of the airbag ballast device and the unified air volume control module of multiple airbags. The control terminal 909 controls the opening of the first air valve 904, the second air valve 905, the third air valve 906 and the fourth air valve 907, and the air pump 901 adjusts the inflation volume in the four ballast airbags 801 so that the buoyancy of the cross-medium vehicle is equal to the weight, thereby achieving zero-energy underwater suspension or floating on the water surface.

[0045] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A multi-functional airbag system for assisting cross-medium vehicles in rapid cross-medium travel, characterized in that, It includes an airbag buffer device, an airbag ballast device, and a multi-airbag air volume unified control module. The airbag buffer device is located at the head of the cross-medium vehicle, the airbag ballast device is located in the middle section of the cross-medium vehicle, and the multi-airbag air volume unified control module is located at the tail of the cross-medium vehicle. The airbag buffer device includes a buffer airbag, a guide rail, a slider, a pressure plate, a sliding hatch, and a water divider. When the aircraft is in a horizontal attitude, the head of the buffer airbag is set at the front end of the sliding hatch via a pressure ring, the tail of the buffer airbag is fixedly set on the pressure plate via a slider, the pressure plate is set on the water divider, the slider is set on the guide rail, and the water divider is set at the front end of the airbag buffer device. The airbag ballast device includes a ballast airbag, a clamping frame, an inner shell, and an outer shell; the ballast airbag is fixedly mounted on the inner shell by the clamping frame, and the ballast airbag is located between the inner shell and the outer shell when it is not inflated; the inner shell and the outer shell are connected by bolts; and the outer shell is provided with a slot for releasing the ballast airbag. There are four ballast airbags, four clamping frames, and four slots. The ballast airbags are evenly arranged on the outer side of the inner shell, and the slots on the outer shell correspond one-to-one with the ballast airbags.

2. The multi-functional airbag system for assisting rapid cross-medium navigation in vehicles according to claim 1, characterized in that, There are four guide rails and four sliders, with the four guide rails evenly arranged inside the sliding hatch cover.

3. The multi-functional airbag system for assisting rapid cross-medium navigation in vehicles according to claim 1, characterized in that, The multi-airbag air volume unified control module includes an air pump, a first high-pressure air tank, a second high-pressure air tank, a third high-pressure air tank, a fourth high-pressure air tank, a central air tube, a control terminal, a pressure sensor, a first air valve, a second air valve, a third air valve, a fourth air valve, and a fifth air valve. The first, second, third, and fourth high-pressure air tanks are all located at the tail of the vehicle. The air pump is located on top of the first high-pressure air tank. The central air pipe is located between the first, second, third, and fourth high-pressure air tanks. The control terminal is located on top of the air pump. The first air valve is located between the first high-pressure air tank and the ballast airbag. The second air valve is located between the second high-pressure air tank and the ballast airbag. The third air valve is located between the third high-pressure air tank and the ballast airbag. The fourth air valve is located between the fourth high-pressure air tank and the ballast airbag. The fifth air valve is located between the buffer airbag and the central air pipe. Pressure sensors are installed inside both the ballast airbag and the buffer airbag.

4. The multi-functional airbag system for assisting rapid cross-medium navigation in vehicles according to claim 3, characterized in that, The four high-pressure gas tanks are evenly distributed at the tail of the vehicle. The outlet of the high-pressure gas tank is connected to the inlet of the air pump through an air pipe. The outlet of the air pump is connected to the head of the central air pipe through an air pipe. The tail of the central air pipe is connected to five air valves through an air pipe. The first, second, third and fourth air valves are connected to four ballast airbags through air pipes, respectively. The fifth air valve is connected to the buffer airbag through an air pipe.

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