An unmanned search and rescue ship based on Beidou navigation

Abstract

This invention relates to the field of intelligent ship technology, specifically to an unmanned search and rescue vessel based on BeiDou navigation. The vessel includes a hull with a cabin and a placement compartment at the rear. A sliding block is slidably connected inside the placement compartment, and a control groove is provided on the sliding block. A control rack is provided on one side of the control groove and is fixedly mounted on the sliding block. A rescue ladder is slidably connected inside the control groove and located inside the placement compartment. A control gear is fixedly connected to a sliding column slidably connected to the rescue ladder and the control groove, and the control gear engages with the control rack. During search and rescue operations, this device can automatically lower and adjust the angle of the rescue ladder. It can also lower the hull height by introducing water into the vessel, facilitating the boarding of personnel who have fallen into the water.

Description

Technical Field

[0001] This invention relates to the field of intelligent ship technology, specifically to an unmanned search and rescue vessel based on BeiDou navigation. Background Technology

[0002] With the successful completion of the BeiDou-3 global network, its unique integrated communication and navigation capabilities, high-precision positioning, and wireless short message communication provide ultimate protection for emergency response in the open ocean. Meanwhile, unmanned vessel technology, starting with China's first vessel, Tianxiang-1, has achieved mature capabilities such as autonomous obstacle avoidance, intelligent decision-making, and remote control after more than a decade of development, and has been listed as a key future industrial direction by the Ministry of Industry and Information Technology. The deep integration of these two technological trends makes BeiDou combined with unmanned vessels the optimal solution to the challenges of search and rescue in the open ocean. It can autonomously navigate, accurately locate, and transmit data in real time in the absence of public networks, and can also autonomously deliver lifebuoys, provide verbal guidance, and conduct nighttime infrared search and rescue, truly achieving all-weather, full-coverage, and zero-casualty intelligent search and rescue.

[0003] When existing equipment is in use and a person falls into the water is being rescued, the hull is constantly rocked and rolled by the waves, making it difficult for the person to board the rescue vessel and increasing the difficulty of boarding. Summary of the Invention

[0004] The purpose of this invention is to provide an unmanned search and rescue vessel based on Beidou navigation, in order to solve the problem mentioned in the background art where, during the use of the equipment, when encountering and rescuing people who have fallen into the water, the hull is constantly pitching and rolling due to the influence of waves, making it difficult for people who have fallen into the water to board the rescue vessel, thus increasing the difficulty of boarding the vessel.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an unmanned search and rescue vessel based on Beidou navigation, comprising a hull, a cabin provided on the hull, a placement compartment provided at the rear of the hull, a sliding block slidably connected inside the placement compartment, a control groove provided on the sliding block, a control rack provided on one side of the control groove, the control rack being fixedly mounted on the sliding block, a rescue ladder slidably connected inside the control groove, the rescue ladder being located inside the placement compartment, and a control gear fixedly connected to a sliding column slidably connected to the rescue ladder and the control groove, the control gear being used for meshing with the control rack.

[0006] Furthermore, a limiting groove is provided on the side wall of the placement compartment, and the end of the sliding column of the rescue ladder is slidably connected to the limiting groove.

[0007] Furthermore, a sliding groove is provided on the lower side of the placement compartment. The sliding groove is formed on the hull. A sliding protrusion is slidably connected inside the sliding groove. The sliding protrusion is fixedly connected to the sliding block. A hydraulic rod is fixedly connected to one side of the sliding protrusion. The hydraulic rod is installed inside the hull.

[0008] Furthermore, a water tank is provided inside the lower part of the hull, and the water tank is connected to a water inlet.

[0009] Furthermore, a pair of sealing floats are slidably connected inside the water tank, and each sealing float has a hollow groove in the middle.

[0010] Furthermore, a sliding plate is slidably connected inside the empty slot, a sliding column is fixedly connected to one side of the sliding plate, a fixed rod is fixedly connected to one side of the sliding plate, the fixed rod is slidably connected to the inside of the hull, and one end of the fixed rod is fixedly connected to one side of the sliding block.

[0011] Furthermore, the sealing float has a guide groove and a guide straight groove inside, the guide groove and the guide straight groove are interconnected, and the sliding column is slidably connected to the guide groove and the guide straight groove.

[0012] Furthermore, a pressure plate is slidably connected to one side of the guide groove, and an airbag is fixedly connected to one side of the pressure plate. A first spring is provided inside the airbag, and one end of the first spring abuts against the inside of the sealing float. An air tube is fixedly connected to the airbag.

[0013] Furthermore, one end of the air tube is fixedly connected to a sealed slide chamber, and an extended float plate is provided inside the sealed slide chamber. The extended float plate is slidably connected to the interior of the sealed float block. A second spring is fixedly installed on one side of the extended float plate, and one end of the second spring is fixedly connected to the interior of the sealed float block.

[0014] The technical solution provided by this invention has the following advantages compared with the known prior art: I. The life ladder 7 of this invention achieves angle self-locking through gear and rack meshing to prevent rotation during climbing. At the same time, the sealing float 15 extends from inside the hull 1 to increase the water surface contact area. The water tank 13 is filled with water through the water inlet 14 to lower the center of gravity and water level. The extended float 27 extends from inside the sealing float 15 to further increase the contact area, forming a triple stabilizing combination of float, water filling and extended float. This makes the hull 1 more stable, the water level lower, the climbing height of people falling into the water less, the swaying amplitude less, and the boarding process safer and less strenuous. Second, relying on Beidou navigation and unmanned driving technology, this invention can automatically search for and locate people who have fallen into the water and adjust the hull 1 to the optimal position without human intervention; the hydraulic rod 12 drives the gear and rack of the control gear 8 and the control rack 6 to mesh and transmit the transmission, so that the rescue ladder 7 can complete the entire set of actions of sliding out, tilting down, rotating and locking the angle in a very short time. The entire deployment process is fast and efficient, minimizing the waiting time of people who have fallen into the water and seizing the golden rescue opportunity. Third, after the person who fell into the water boarded the boat, the hydraulic rod 12 can be reversed to retract the entire mechanism with one click. The inclined surface of the guide chute 20 automatically pushes the sealing float 15 back into the hull, while squeezing out the water in the water tank 13 to reduce the weight of the hull 1 and save return power. The airbag 23 is automatically refilled with gas through the air pipe 25 with the cooperation of the first spring 24 and the second spring 28. The whole process does not require additional energy, which greatly reduces the operation and maintenance cost and improves the endurance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fully deployed hull structure of the present invention; Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 4 This is a schematic diagram of the limiting groove structure of the present invention; Figure 5 This is a schematic cross-sectional view of the sealing float structure of the present invention; Figure 6 This is a schematic diagram of the guide groove structure of the present invention; Figure 7 This is a schematic diagram of the sealing float structure of the present invention; Figure 8 This is a schematic diagram of the sliding column structure of the present invention; Figure 9 This is a schematic cross-sectional view of the airbag structure of the present invention.

[0017] In the diagram: 1. Hull; 2. Cabin; 3. Storage compartment; 4. Sliding block; 5. Control chute; 6. Control rack; 7. Life ladder; 8. Control gear; 9. Limiting chute; 10. Sliding chute; 11. Sliding protrusion; 12. Hydraulic rod; 13. Water tank; 14. Water inlet; 15. Sealing float; 16. Empty chute; 17. Sliding plate; 18. Sliding column; 19. Fixing rod; 20. Guide sloping chute; 21. Guide straight chute; 22. Pressure plate; 23. Airbag; 24. First spring; 25. Air pipe; 26. Sealing compartment; 27. Extension float; 28. Second spring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to embodiments.

[0020] Example: An unmanned search and rescue vessel based on BeiDou navigation, such as Figures 1-9As shown, the vessel includes a hull 1. It should be noted that the power equipment of the hull 1 is existing technology, and professionals in this field can freely select it according to actual conditions. The hull 1 is equipped with a cabin 2, which provides a position for people who fall into the water. A placement compartment 3 is located at the rear of the hull 1. A sliding block 4 is slidably connected inside the placement compartment 3. The placement compartment 3 can restrict the position of the sliding block 4, preventing it from deviating during its linear sliding along the inner wall of the placement compartment 3. A control groove 5 is provided on the sliding block 4, and a control rack 6 is provided on one side of the control groove 5. The control rack 6 is fixedly installed on the sliding block 4. A rescue ladder 7 is slidably connected inside the control groove 5. The rescue ladder 7 is located inside the placement compartment 3, and a sliding column is fixedly connected to the control groove 5. The rescue vessel is equipped with a control gear 8. Through the design of the control groove 5, the position of the rescue ladder 7 can be restricted. The control gear 8 is used to mesh with the control rack 6. With this design, the angle of the rescue ladder 7 can be adjusted by the cooperation between the control gear 8 and the control rack 6, making it easier for people who have fallen into the water to board the vessel. It should be noted that the rescue vessel is equipped with Beidou navigation technology and unmanned driving technology. These technologies are existing technologies, and professionals in this field can freely select them according to the actual situation. At the same time, the tooth width direction of the control gear 8 and the tooth width direction of the control rack 6 are both set in the vertical direction. The two form a vertical gear and rack meshing pair. When the sliding column moves vertically downward in the control groove 5, the tooth surface of the control gear 8 and the tooth surface of the control rack 6 gradually contact and mesh, thereby driving the rescue ladder 7 to rotate around the axis of the sliding column. It should be noted that the control slide 5 is a straight groove extending in the vertical direction with a rectangular cross-section. The control rack 6 is fixedly installed on one side of the groove wall of the control slide 5, with its tooth surface facing the inside of the control slide 5.

[0021] A limiting groove 9 is provided on the side wall of the placement compartment 3, and the end of the sliding column of the rescue ladder 7 is slidably connected to the limiting groove 9.

[0022] A sliding groove 10 is provided on the lower side of the placement compartment 3. The sliding groove 10 is opened on the hull 1. A sliding protrusion 11 is slidably connected inside the sliding groove 10. The opening of the sliding groove 10 can limit the position of the sliding protrusion 11 and prevent the sliding protrusion 11 from deviating during the sliding process. The sliding protrusion 11 is fixedly connected to the sliding block 4. A hydraulic rod 12 is fixedly connected to one side of the sliding protrusion 11. The hydraulic rod 12 is installed inside the hull 1. The design of the hydraulic rod 12 can provide power to the sliding block 4.

[0023] A water tank 13 is provided inside the lower part of the hull 1. The water tank 13 is connected to a water inlet 14. This design allows water to enter the water tank 13, thereby increasing the stability of the hull 1 and lowering the water level of the hull 1, making it easier for people who fall into the water to get on board.

[0024] The water tank 13 has a pair of sealing floats 15 that are slidably connected inside, and each sealing float 15 has a slot 16 in the middle.

[0025] A sliding plate 17 is slidably connected inside the empty groove 16. A sliding column 18 is fixedly connected to one side of the sliding plate 17. A fixed rod 19 is fixedly connected to one side of the sliding plate 17. The fixed rod 19 is slidably connected to the inside of the hull 1. One end of the fixed rod 19 is fixedly connected to one side of the sliding block 4. It should be noted that, in order to prevent water from seeping into the hull from the sliding gap between the sealing float 15 and the hull 1, a sealing ring is embedded in the inner wall of the sliding guide hole of the hull 1. The sealing ring is slidably sealed with the outer wall of the sealing float 15.

[0026] The sealing float 15 has a guide groove 20 and a guide straight groove 21 inside. The guide groove 20 and the guide straight groove 21 are interconnected. The sliding column 18 is slidably connected to the guide groove 20 and the guide straight groove 21. With this design, when the sliding plate 17 drives the sliding column 18 to slide in the guide groove 20, the sealing float 15 can extend outward from the inside of the hull 1, thereby increasing the contact area between the hull 1 and the water surface, and thus increasing the stability of the hull 1.

[0027] A pressure plate 22 is slidably connected to one side of the guide groove 21, and an airbag 23 is fixedly connected to one side of the pressure plate 22. A first spring 24 is provided inside the airbag 23, and one end of the first spring 24 abuts against the inside of the sealing float 15. An air tube 25 is fixedly connected to the airbag 23.

[0028] One end of the air pipe 25 is fixedly connected to a sealed slide chamber 26. An extension float 27 is provided inside the sealed slide chamber 26. The extension float 27 is slidably connected to the inside of the sealed float 15. With this design, after the sealed float 15 extends out of the hull 1, the extension float 27 can also extend out of the sealed float 15, further increasing the contact area with the water surface and making the hull 1 more stable. A second spring 28 is fixedly installed on one side of the extension float 27. One end of the second spring 28 is fixedly connected to the inside of the sealed float 15. It should be noted that if the first spring 24 and the second spring 28 experience elastic fatigue during later use, they can be directly replaced.

[0029] When the equipment encounters a person in the water during the search, it first automatically adjusts the position of the hull 1 to facilitate the person's boarding. Then, it activates the hydraulic rod 12 inside the hull 1, which drives the sliding protrusion 11 to slide within the sliding groove 10. This allows the sliding protrusion 11 to move the sliding block 4 within the placement compartment 3. Simultaneously, the sliding block 4 moves the life ladder 7, allowing it to slide out of the placement compartment 3 for the person in the water to board. While the sliding block 4 moves the life ladder 7, it also causes one end of the sliding column on the life ladder 7 to slide within the limiting groove 9. Figure 1 This allows the life ladder 7 to slide downwards under the guidance of the limiting groove 9 while sliding to the left. By moving the life ladder 7 downwards, it can be inserted into the water, providing convenience for people who have fallen into the water. As the sliding column of the rescue ladder 7 slides downwards, it will slide downwards within the control groove 5. Figure 4 When the sliding column of life ladder 7 slides downwards, it drives the control gear 8 to slide downwards as well. During the downward sliding process, the control gear 8 engages with the control rack 6 on the sliding block 4. Through the cooperation between the control gear 8 and the control rack 6, the life ladder 7 can rotate in the direction of underwater movement while sliding downwards, allowing it to be inserted into deeper water and further facilitate the entry of people in the water. It should be noted that the cooperation between the control rack 6 and the control gear 8 can fix the position of the life ladder 7 after it is inserted into the water, preventing the life ladder 7 from rotating when used by people in the water. At the same time, when the life ladder 7 rotates in the direction of underwater movement, the hull 1 will maintain a safe distance from the people in the water to prevent collisions. Once the life ladder 7 is fully in place, the hull 1 will immediately adjust its position to facilitate the entry of people in the water onto the boat.

[0030] As the hydraulic rod 12 drives the sliding block 4 to slide within the placement chamber 3, the sliding block 4 will cause the fixed rod 19 to slide together. While the fixed rod 19 is sliding, it will cause the sliding plate 17 to slide together. As the sliding plate 17 is sliding, it will cause the sliding column 18 to slide together, allowing the sliding column 18 to slide within the guide groove 20. Guided by the guide groove 20, the sealing float 15 extends outward from the hull 1. As the sealing float 15 extends, it will open the water tank 13 inside the hull 1. When the water tank 13 opens, a large amount of water will enter the water tank 13 through the inlet 14. This design increases the overall weight of the hull 1, allowing the hull 1 to descend, increasing the stability of the hull and lowering the center of gravity, thus reducing the swaying amplitude of the hull when people who have fallen into the water board the hull. Meanwhile, the extension of the sealing float 15 increases the overall contact area between the hull 1 and the water surface. This design further reduces the swaying amplitude of the hull 1, increases the stability of the hull 1, and facilitates the boarding of people who have fallen into the water.

[0031] When the sealing float 15 extends from the hull 1, the fixing rod 19 continues to slide along with the sliding block 4. At this time, the fixing rod 19 pulls the sliding column 18 on the sliding plate 17 from the guide groove 20 into the guide straight groove 21. During the sliding process of the sliding column 18 in the guide straight groove 21, it comes into contact with the pressure plate 22 inside the guide straight groove 21. While contacting the pressure plate 22, the sliding column 18 compresses the pressure plate 22, causing the pressure plate 22 to compress the airbag 23 and the first spring 24 inside the airbag 23. (See...) Figure 9 When the pressure plate 22 is pressed down, it will squeeze the gas in the airbag 23 into the air pipe 25. Then, the gas in the airbag 23 will enter the sealed slide chamber 26 through the air pipe 25. This allows the gas to drive the extension float 27 in the sealed slide chamber 26. While the extension float 27 slides in the sealed slide chamber 26, it can extend out from the sealed float block 15, further increasing the contact area between the hull 1 and the water surface. This can further reduce the swaying amplitude of the hull 1, increase the stability of the hull 1, and facilitate the boarding of personnel who fall into the water. It should be noted that the equipment can be fully deployed in a very short time.

[0032] Once the person who fell into the water boards the ship and enters cabin 2, the hydraulic rod 12 is activated, causing it to slide back. This pulls the sliding block 4 and the life ladder 7 into the placement compartment 3. As the sliding block 4 slides back, it also pulls the fixed rod 19 back, gradually reducing the pressure of the sliding column 18 on the pressure plate 22. This allows the pressure plate 22 to return to its original position under the action of the first spring 24. At the same time, the extended float 27 returns to its original position under the action of the second spring 28, allowing the gas in the sealed sliding compartment 26 to flow back into the airbag 23 through the air pipe 25, preparing for the next use. When the sliding column 18 slides from the guide straight groove 21 into the guide inclined groove 20, it guides the sealing floats 15 on both sides to slide into the interior of the hull 1. As the sealing floats 15 slide into the hull 1, they squeeze out the water in the water tank 13, reducing the weight of the hull 1 and saving power for the return voyage.

[0033] It should be noted that the inlet 14 is always open. In the initial state, the sealing float 15 is completely retracted into the water tank 13 and acts as a sealing cover for the water tank 13 to prevent external water from entering. When the sealing float 15 slides outward, it communicates with the external water body through the inlet 14. Water rushes into the water tank 13 under the weight of the hull 1 and the water pressure. When the sealing float 15 retracts into the water tank 13 under the drive of the hydraulic rod 12, its front end face forcibly squeezes the water stored in the water tank 13. The water pressure generated pushes the water out of the hull from the inlet 14, thereby achieving rapid drainage and weight reduction.

[0034] In this embodiment: The system automatically searches for people who have fallen into the water using BeiDou navigation and unmanned driving technology. After locating them, it automatically adjusts the position of the hull 1. Subsequently, the hydraulic rod 12 drives the sliding protrusion 11 to slide within the sliding groove 10, causing the sliding block 4 to move within the placement compartment 3. This allows the life ladder 7 to slide out of the placement compartment 3. The end of the sliding column of the life ladder 7 slides within the limiting groove 9, and under the guidance of the limiting groove 9, it tilts downwards and inserts into the water. Simultaneously, the control gear 8 on the life ladder 7 moves downwards with the sliding column within the control groove 5, engaging with the sliding block 4... The control rack 6 engages, causing the life ladder 7 to rotate underwater and lock at an angle as it descends, preventing rotation during use and ensuring the safety of people climbing into the water. Simultaneously, the sliding block 4, via the fixed rod 19, drives the sliding plate 17 and sliding column 18 to slide within the guide groove 20, pushing a pair of sealing floats 15 out of the hull 1, increasing the contact area between the hull 1 and the water surface. At the same time, the water tank 13 opens, allowing a large amount of water to rush into it through the inlet 14, increasing the weight of the hull 1, lowering the center of gravity and water level, and significantly improving stability. The deployment process is designed to reduce the difficulty of boarding the vessel. Then, the sliding column 18 slides from the guide sloping groove 20 into the guide straight groove 21, squeezing the pressure plate 22. This forces the gas in the airbag 23 through the air pipe 25 into the sealed sliding chamber 26, driving the extension float 27 to extend from the sealed float block 15. Under the action of the second spring 28, the water surface contact area is further increased, achieving a double stabilizing effect. The entire deployment process is completed in a very short time. After the person in the water smoothly boards the vessel and enters the cabin 2 via the locked-angle life ladder 7, the hydraulic rod 12 reverses the driving action of the sliding block 4 and the life ladder. Ladder 7 retracts into placement compartment 3, and fixing rod 19 pulls back, causing sliding column 18 to return from guide straight groove 21 to guide inclined groove 20. The inclined surface of guide inclined groove 20 pushes sealing float 15 back into the hull 1. At the same time, pressure plate 22 resets under the action of first spring 24, and gas flows back to airbag 23 through air pipe 25. Extended float 27 retracts under the action of second spring 28. When sealing float 15 retracts, it squeezes water out of water tank 13 to reduce the weight of hull 1 and save return power. Airbag 23 automatically refills with gas to prepare for the next use. The overall solution achieves the comprehensive advantages of rapid response, precise positioning, dual stabilization, automatic locking, and cyclic reuse through the linkage of multiple mechanisms such as hydraulic rod 12 drive, control gear 8 meshing with control rack 6 transmission, airbag 23 pneumatic transmission, and guide inclined groove 20. This greatly improves the efficiency and safety of unmanned search and rescue.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An unmanned search and rescue vessel based on Beidou navigation, comprising a hull (1), wherein a cabin (2) is provided on the hull (1), characterized in that: A storage compartment (3) is provided at the rear of the hull (1). A sliding block (4) is slidably connected inside the storage compartment (3). A control groove (5) is provided on the sliding block (4). A control rack (6) is provided on one side of the control groove (5). The control rack (6) is fixedly installed on the sliding block (4). A life ladder (7) is slidably connected inside the control groove (5). The life ladder (7) is located inside the storage compartment (3). A control gear (8) is fixedly connected on the sliding column that is slidably connected to the control groove (5). The control gear (8) is used to mesh with the control rack (6).

2. The unmanned search and rescue vessel based on Beidou navigation as described in claim 1, characterized in that: The side wall of the placement compartment (3) is provided with a limiting groove (9), and the end of the sliding column of the rescue ladder (7) is slidably connected to the limiting groove (9).

3. The unmanned search and rescue vessel based on Beidou navigation as described in claim 1, characterized in that: The lower side of the placement compartment (3) is provided with a sliding groove (10), the sliding groove (10) is opened on the hull (1), the sliding groove (10) is slidably connected to a sliding protrusion (11), the sliding protrusion (11) is fixedly connected to the sliding block (4), and a hydraulic rod (12) is fixedly connected to one side of the sliding protrusion (11), the hydraulic rod (12) is installed inside the hull (1).

4. The unmanned search and rescue vessel based on Beidou navigation as described in claim 1, characterized in that: A water tank (13) is provided inside the hull (1) below the hull, and the water tank (13) is connected to a water inlet (14).

5. The unmanned search and rescue vessel based on Beidou navigation according to claim 4, characterized in that: The water tank (13) is internally connected to a pair of sealing floats (15), and each of the sealing floats (15) has a slot (16) in the middle.

6. The unmanned search and rescue vessel based on Beidou navigation according to claim 5, characterized in that: The interior of the slot (16) is slidably connected to a sliding plate (17), a sliding column (18) is fixedly connected to one side of the sliding plate (17), a fixed rod (19) is fixedly connected to one side of the sliding plate (17), the fixed rod (19) is slidably connected to the interior of the hull (1), and one end of the fixed rod (19) is fixedly connected to one side of the sliding block (4).

7. The unmanned search and rescue vessel based on Beidou navigation according to claim 6, characterized in that: The sealing float (15) has a guide groove (20) and a guide straight groove (21) inside. The guide groove (20) and the guide straight groove (21) are interconnected. The sliding column (18) is slidably connected to the guide groove (20) and the guide straight groove (21).

8. The unmanned search and rescue vessel based on Beidou navigation according to claim 7, characterized in that: A pressure plate (22) is slidably connected to one side of the guide groove (21), and an airbag (23) is fixedly connected to one side of the pressure plate (22). A first spring (24) is provided inside the airbag (23), and one end of the first spring (24) abuts against the inside of the sealing float (15). The airbag (23) is fixedly connected to an air tube (25).

9. The unmanned search and rescue vessel based on Beidou navigation according to claim 8, characterized in that: One end of the air tube (25) is fixedly connected to a sealed slide chamber (26). An extension float (27) is provided inside the sealed slide chamber (26). The extension float (27) is slidably connected to the inside of the sealed float block (15). A second spring (28) is fixedly installed on one side of the extension float (27). One end of the second spring (28) is fixedly connected to the inside of the sealed float block (15).

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