Wireless communication device suitable for underwater model test in negative-pressure high-sea-condition environment

Abstract

The invention provides a wireless communication device suitable for an underwater model test in a negative-pressure high-sea-condition environment, and belongs to the field of water-air cross-medium model tests of navigation bodies. The problem that a cross-medium communication device is prone to water leakage in the working condition of pressure change is solved. The device comprises a wireless device bearing assembly, a cavity used for containing a wireless device is formed in the wireless device bearing assembly, an airtight cabin penetrating structure is arranged on the end face of the near-water side, and an air cavity is formed between the airtight cabin penetrating structure and the water surface; and the buoyancy part is arranged on the wireless device bearing assembly and is used for lifting the wireless device bearing assembly above the water surface. The wireless communication device is mainly used for wireless communication of underwater model tests.

Description

Technical Field

[0001] The present invention belongs to the field of water-air cross-medium model testing of navigation bodies, and in particular relates to a wireless communication device suitable for underwater model testing in a negative pressure and high sea condition environment. Background Art

[0002] Conducting water-emergence tests on vehicle models in the laboratory is an important means of understanding the surface cavitation development characteristics and corresponding mechanical properties involved in the water-emergence process of the vehicle. In order for laboratory results to be used to guide the development of actual cross-media vehicles and other marine equipment, the test environment must meet the test conditions. The most important of these is the negative pressure test environment, which poses stability challenges to the various equipment in it. The water-emergence test of a vehicle under high sea conditions involves a water-air cross-media process. The vehicle needs to communicate uninterruptedly both underwater and above water. However, simple radio, underwater acoustic, and optical communications will produce great instability at the interface between air and water, and radio cannot propagate normally in water or underwater acoustics in air. Especially in a laboratory environment, the interference of large equipment and the impact of high sea conditions and waves will further deteriorate the communication quality and stability, seriously affecting the progress of the cross-media water-emergence test.

[0003] To further conduct laboratory high-sea-state model underwater testing, there is an urgent need to develop a stable and reliable water-to-air communication device that can operate in alternating positive and negative pressure environments and overcome the effects of high sea-state waves and currents. Patent Publication No. CN117318837A discloses a cross-medium communication method suitable for underwater vehicles. This method achieves underwater-to-surface communication by deploying optical fiber cables between an underwater base station and an aerial communication target, and placing an optical fiber compensator on the water surface. However, the optical fiber compensator in this method is not suitable for negative pressure environments, and the optical fiber payout is directional, making it unsuitable for environments with high sea-state wave simulations. Patent Publication No. CN116800561A discloses a wireless terminal-based cross-medium communication gateway device, providing a method for underwater-to-surface communication. However, this device is not suitable for the alternating positive and negative pressure conditions and high sea-state waves and currents encountered in the test. Furthermore, the device uses underwater acoustic transducers for communication, and the dense concentration of various large and medium-sized equipment in the laboratory can severely impact underwater acoustic communication. Therefore, this device is not suitable for underwater model testing in negative pressure and high sea-state environments. Summary of the Invention

[0004] In view of this, the present invention aims to propose a wireless communication device suitable for underwater model testing in a negative pressure and high sea condition environment, so as to solve the problem that cross-medium communication devices are prone to water leakage under pressure-changing working conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a wireless communication device suitable for underwater model testing in a negative pressure high sea state environment, comprising:

[0006] A wireless device housing assembly is provided with a cavity for accommodating the wireless device, and an airtight through-cabin structure is provided on the end surface near the water, forming an air cavity between the airtight through-cabin structure and the water surface;

[0007] The buoyancy part is arranged on the wireless device holding assembly and is used to lift the wireless device holding assembly above the water surface.

[0008] Furthermore, the device also includes underwater equipment, which is connected to the wireless device through a zero-buoyancy network cable.

[0009] Furthermore, the airtight through-cabin structure is a stepped opening, and the diameter of the opening close to the interior of the wireless device receiving assembly is smaller than the diameter of the opening on the side away from the wireless device receiving assembly.

[0010] Furthermore, the wireless device receiving assembly includes a blocking portion and a bearing portion. The blocking portion and the bearing portion are connected to form a cavity for accommodating the wireless device. The bearing portion is a cylindrical structure.

[0011] Furthermore, a sealing component is provided at the connection position between the blocking portion and the bearing portion.

[0012] Furthermore, the buoyancy center formed by the buoyancy portion is lower than the buoyancy center of the wireless device receiving assembly.

[0013] Furthermore, the buoyancy parts are spherical and are provided in a plurality of spheres, and are evenly arranged around the wireless device receiving assembly.

[0014] Furthermore, the buoyancy portion is connected to the wireless device receiving assembly via a support portion.

[0015] Furthermore, the wireless device housing assembly is connected to the underwater equipment via a constraint portion, and the constraint portion is used to prevent the zero-buoyancy network cable from being pulled.

[0016] Furthermore, the constraint portion is connected to the zero-buoyancy mesh line through binding components arranged at intervals, and the length of the corresponding constraint portion between each two adjacent binding components is less than the length of the zero-buoyancy mesh line.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This device can achieve stable communication in underwater cross-medium water testing under the requirements of negative pressure environment and high sea state environment simulation in the laboratory. A universal wireless communication module is placed in it to establish an above-water and underwater communication bridge;

[0019] 2. This device uses the buoyancy section to lift the wireless device assembly above the water surface. At the same time, thanks to the formation of the air cavity, the airtight penetration structure is always isolated from the water. Regardless of the pressure conditions, especially when the relative air pressure of the test environment changes positively or negatively, water infiltration caused by the simultaneous existence of negative pressure and contact with ambient water is effectively avoided.

[0020] 3. The combined design of the float and the wireless device mounting assembly ensures the stability of the floating direction of the float when impacted by waves in high sea conditions, and can resist the pushing effect of the waves to a certain extent, so that it does not drift in the direction of the waves.

[0021] 4. The underwater tensile strength method formed by the setting of the constraint part and the binding method with the zero-buoyancy network cable can effectively prevent the communication instability or even link disconnection caused by the impact of high sea conditions and currents on the water surface and the dragging caused by the horizontal movement of the underwater test system.

[0022] 5. This device can be used in relevant water discharge tests in negative pressure environments and high sea wave and current environments, and has high practical engineering significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a front cross-sectional view of a wireless communication device suitable for underwater model testing in a negative pressure and high sea state environment according to the present invention;

[0025] Figure 2 A top view of a wireless communication device suitable for underwater model testing in a negative pressure and high sea state environment according to the present invention;

[0026] Figure 3 A bottom view of a wireless communication device suitable for underwater model testing in a negative pressure and high sea state environment according to the present invention;

[0027] Figure 4 Schematic diagram of the connection relationship between the bearing portion and the buoyancy portion of the present invention;

[0028] Figure 5 Schematic diagram of the structure of the blocking portion of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection between a wireless communication device and underwater equipment suitable for underwater model testing in a negative pressure and high sea condition environment as described in the present invention.

[0030] Sealing part 1; bearing part 2; airtight through-chamber structure 3; buoyancy part 4; support part 5; first through hole 6; first groove 7; second groove 8; second through hole 9; O-ring groove 10; O-ring 11; zero buoyancy network line 12; constraint part 13; fixed support part 14; movable underwater equipment watertight compartment 15. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features therein can be combined with each other in the absence of conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0032] It should be noted that the descriptions of the present invention regarding directions such as "left", "right", "left side", "right side", "upper", "lower", "top", and "bottom" are all defined based on the relationship between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure described must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0034] Referring to the accompanying drawings, this embodiment is described. A wireless communication device suitable for underwater model testing in a negative pressure high sea state environment includes:

[0035] The wireless device housing assembly has a cavity for accommodating the wireless device, and an airtight through-cabin structure 3 is provided on the water-side end face, forming an air cavity between the airtight through-cabin structure 3 and the water surface; the airtight through-cabin structure 3 is specifically arranged at the center position of the water-side end face, and is extended in the axial direction.

[0036] Specifically, the wireless device housing assembly includes a sealing portion 1 and a bearing portion 2. The sealing portion 1 and the bearing portion 2 are connected to form a cavity for accommodating the wireless device. The bearing portion 2 is a flat cylindrical structure with a certain thickness. Its upper surface is grooved, and a rubber O-ring is placed in the groove. The sealing portion 1 is disc-shaped and is connected to the open side provided on the upper part of the bearing portion 2 to form a cavity for accommodating the wireless device. First through holes 6 are provided at corresponding positions of the sealing portion 1 and the bearing portion 2. The specific number is 12, and they are arranged in a circumferentially uniform manner, for passing screws to fix the sealing portion 1 and the bearing portion 2. In order to facilitate the removal of the screws or connection in the form of a bolt group, a first groove 7 is provided on the circumferential side of the bearing portion 2 to communicate with the first through holes 6.

[0037] The buoyancy portion 4 is provided on the wireless device housing assembly and is used to lift the wireless device housing assembly above the water surface. Specifically, the buoyancy center formed by the buoyancy portion 4 is lower than the buoyancy center of the wireless device housing assembly. In this way, the wireless device housing assembly can be lifted above the water surface, which can, to a certain extent, prevent the airtight through-tank structure 3 from coming into contact with water. At the same time, since an air cavity is formed at the position of the airtight through-tank structure 3, the buoyancy portion 4 provides support, allowing the bearing portion 2 to maintain a floating posture in the waves. In this case, the air cavity can be maintained after contact with water. Regardless of whether the external experimental or actual conditions are positive or negative pressure, the air cavity can effectively isolate water from the airtight through-tank structure 3, preventing water from entering the wireless device housing assembly through the airtight through-tank structure 3 and affecting the wireless device.

[0038] The underwater equipment is connected to the wireless device via a zero-buoyancy network cable 12. Specifically, a penetration piece is provided at the airtight penetration structure 3, and the zero-buoyancy network cable 12 is connected to the wireless device via the penetration piece.

[0039] In this embodiment, the airtight penetration structure 3 is a stepped opening, and the diameter of the opening close to the inside of the wireless device receiving assembly is smaller than the diameter of the opening on the far side. It can also be set as a slotted hole, in which the side with the larger diameter is set in the form of a slot. In this way, the penetration component is installed from the inside to the outside during installation, so that when the air pressure of the external experimental environment is negative, the penetration component can be further compressed by the internal pressure to prevent leakage. At the same time, it is conducive to the formation of an air cavity, and the diameter of the larger side of the opening is 2-3 times that of the smaller side. This structure can ensure that when the isolation barrel is placed vertically under the water surface, the penetration position is surrounded by a certain amount of air to prevent water from entering the isolation barrel, i.e., the bearing part 2, when the surrounding gas environment switches from positive to negative pressure under certain circumstances.

[0040] In this embodiment, a sealing assembly is provided at the connection between the sealing portion 1 and the supporting portion 2. Specifically, an O-ring groove 10 is provided on the open end surface of the supporting portion 2, and an O-ring 11 is disposed in the O-ring groove 10. When the sealing portion 1 and the supporting portion 2 are in close contact, a sealing effect is achieved. The specific positions of the O-ring groove 10 and the O-ring 11 can be arranged appropriately according to actual conditions and are not shown in the figure.

[0041] In this embodiment, the buoyancy components 4 are spherical and are provided in multiple numbers, evenly spaced around the wireless device housing assembly. This arrangement allows the cylindrical support component 2 to float while maintaining a vertical position, maintaining a stable position during undulations. During vertical immersion in water, the air cavity forms an insulating layer, effectively isolating the airtight penetrating structure 3 from the water in most situations. This extends the service life and prevents water leaks from affecting the wireless device.

[0042] In this embodiment, the buoyancy part 4 is connected to the wireless device housing assembly through the support part 5. The support part 5 specifically adopts an oblique rod to extend the buoyancy part 4 for a distance and then fix it. This method can expand the distribution points provided by the buoyancy, thereby increasing the stability in dealing with waves and currents in all directions. It is beneficial to maintain the vertical posture of the bearing part 2, which is beneficial to the formation of the air cavity. The sealing part 1, the bearing part 2 and the support part 5 are made of nylon, and the buoyancy part 4 is made of PVC foam. The specific connection method between the support part 5 and the bearing part 2 is welding, and the support part 5 and the buoyancy part 4 are connected by plug-in bonding. The buoyancy part 4 is specifically set to 8, which are evenly arranged around the circumference.

[0043] In this embodiment, the wireless device housing assembly and the underwater equipment are connected via a restraint 13, which prevents the zero-buoyancy network cable 12 from being pulled. Specifically, restraint 13 is a strong, corrosion-resistant steel wire rope. One end of restraint 13 is secured to the main body of the isolation barrel (carrying portion 2), and the other end is connected to the watertight outer shell of the test system, enhancing the cable's tensile strength in the presence of waves and currents. Both ends of the zero-buoyancy network cable 12 are modified with connectors that mate with airtight penetrations to enhance ease of use and replacement.

[0044] In this embodiment, the constraint portion 13 is connected to the zero-buoyancy mesh line 12 through spaced-apart bundling components. Between each two adjacent bundling components, the length of the corresponding constraint portion 13 is less than the length of the zero-buoyancy mesh line 12. The bundling component is specifically a fixed ring with a certain strength and corrosion resistance. It can be reasonably selected according to actual needs. All components that can ensure a stable bundling between the constraint portion 13 and the zero-buoyancy mesh line 12 can be used in this application. By making the length of the corresponding constraint portion 13 less than the length of the zero-buoyancy mesh line 12, the zero-buoyancy mesh line 12 has both constraints and stretching margin as a whole, which can effectively prevent the zero-buoyancy mesh line 12 from structural damage due to the movement of waves and currents, thereby ensuring durability and stability in use. The method for connecting the reinforcement mesh cable to the barrel body is as follows: a shallow second groove 8 is opened circumferentially at a certain distance from the lower surface of the barrel body, a steel wire rope is bundled in the second groove 8, and four second through holes 9 are punched from the four quadrants of the bottom surface of the second groove 8 to the bottom of the bearing part 2. The four steel wire ropes are respectively passed through the four second through holes 9 to connect with the circumferential steel wire ropes. The other ends of the four steel wire ropes are welded and fixed and connected to the zero buoyancy mesh cable 12. The underwater equipment here specifically refers to the fixed support part 14 and the movable underwater equipment watertight compartment 15 connected thereto. The fixed support part 14 is specifically configured as a steel frame to provide support for the movable underwater equipment watertight compartment 15.

[0045] In the above description, the sensors, controllers and control programs that may be involved are all existing technologies and will not be described in detail.

[0046] The embodiments of the present invention disclosed above are intended only to illustrate the present invention. The embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A wireless communication device suitable for underwater model testing in a negative pressure high sea state environment, characterized in that: include: A wireless device receiving assembly is provided with a cavity for accommodating the wireless device, and an airtight through-cabin structure (3) is provided on the end surface near the water, and an air cavity is formed between the airtight through-cabin structure (3) and the water surface; The buoyancy part (4) is arranged on the wireless device receiving assembly and is used to lift the wireless device receiving assembly above the water surface.

2. A wireless communication device suitable for underwater model testing in a negative pressure and high sea state environment according to claim 1, characterized in that: The device also includes underwater equipment connected to the wireless device via a zero-buoyancy network cable (12).

3. The wireless communication device suitable for underwater model testing in a negative pressure and high sea state environment according to claim 1, characterized in that: The airtight cabin penetration structure (3) is a stepped opening, and the diameter of the opening close to the interior of the wireless device receiving assembly is smaller than the diameter of the opening on the far side.

4. The wireless communication device suitable for underwater model testing in a negative pressure high sea state environment according to claim 1, characterized in that: The wireless device receiving assembly comprises a sealing portion (1) and a bearing portion (2); the sealing portion (1) and the bearing portion (2) are connected to form a cavity for accommodating the wireless device; the bearing portion (2) is a cylindrical structure.

5. The wireless communication device suitable for underwater model testing in a negative pressure and high sea state environment according to claim 4, characterized in that: A sealing component is provided at the connection position between the blocking portion (1) and the bearing portion (2).

6. The wireless communication device suitable for underwater model testing in a negative pressure and high sea state environment according to claim 1, characterized in that: The buoyancy center formed by the buoyancy portion (4) is lower than the buoyancy center of the wireless device receiving assembly.

7. The wireless communication device suitable for underwater model testing in a negative pressure and high sea state environment according to claim 1, characterized in that: The buoyancy parts (4) are spherical and are provided in a plurality and are evenly arranged around the wireless device receiving assembly.

8. The wireless communication device suitable for underwater model testing in a negative pressure and high sea state environment according to claim 7, characterized in that: The buoyancy part (4) is connected to the wireless device receiving assembly via the support part (5).

9. A wireless communication device suitable for underwater model testing in a negative pressure high sea state environment according to any one of claims 1 to 8, characterized in that: The wireless device receiving assembly is connected to the underwater equipment via a restraint portion (13), and the restraint portion (13) is used to prevent the zero-buoyancy network cable (12) from being pulled.

10. The wireless communication device suitable for underwater model testing in a negative pressure and high sea state environment according to claim 9, characterized in that: The constraint portion (13) is connected to the zero-buoyancy network line (12) through spaced-apart bundling assemblies, and the length of the corresponding constraint portion (13) between each two adjacent bundling assemblies is less than the length of the zero-buoyancy network line (12).

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