An underwater acoustic signal acquisition device

Abstract

This utility model discloses an underwater acoustic signal acquisition device, including a floating assembly, a signal collector, an antenna, and several stable floating blocks that can be extended upwards to increase the contact area between the acquisition device and the water surface. The signal collector is installed at the bottom of the floating assembly, and the antenna is installed at the top of the floating assembly. The output end of the signal collector is electrically connected to the antenna. The several stable floating blocks are evenly spaced around the floating assembly, and one end of each stable floating block is rotatably connected to the side of the floating assembly. This utility model increases the water surface contact area by setting up deployable stable floating blocks, effectively suppressing the swaying caused by water flow and waves, and improving the stability of signal acquisition. It has the advantage of increasing the water surface contact area to improve the stability of the device.

Description

Technical Field

[0001] This utility model belongs to the field of underwater acoustic signal acquisition technology, specifically relating to an underwater acoustic signal acquisition device for marine environmental monitoring. Background Technology

[0002] Underwater acoustic signal processing and acquisition technology is an important technical means that combines acoustic principles, signal acquisition, and signal processing methods for marine environmental monitoring. Since sound waves are the only form of energy that can effectively propagate over long distances underwater, they play an irreplaceable role in marine resource utilization, environmental monitoring, and underwater safety. To effectively acquire acoustic information from the marine environment, stable and reliable underwater acoustic signal acquisition devices are essential. These devices play a crucial role in several key areas, including marine environmental monitoring, underwater communication, marine exploration, ship navigation, and underwater acoustic detection.

[0003] Most underwater acoustic signal acquisition devices on the market currently employ a buoy-type structure, with the signal collector fixed to the bottom of the buoy. However, this traditional structure has significant drawbacks: First, the limited contact area between the device and the water surface makes it prone to significant swaying under the influence of water currents and waves; second, this instability directly affects the quality of the acquired underwater acoustic signals, causing data distortion; furthermore, traditional devices lack sufficient floating stability and may capsize under adverse weather conditions, severely impacting the continuity and reliability of data acquisition. These problems severely restrict the performance of underwater acoustic signal acquisition devices in practical applications.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the aforementioned background technology and provide an underwater acoustic signal acquisition device that has the advantage of increasing the water surface contact area to improve device stability.

[0006] The technical solution adopted by this utility model is: an underwater acoustic signal acquisition device, including a floating component, a signal collector, an antenna, and several stable floating blocks that can increase the contact area between the acquisition device and the water surface when unfolded upwards. The signal collector is installed at the bottom of the floating component, the antenna is installed at the top of the floating component, the output end of the signal collector is electrically connected to the antenna, and the several stable floating blocks are evenly spaced around the floating component. One end of each stable floating block is rotatably connected to the side of the floating component.

[0007] Furthermore, the floating assembly includes a floating sleeve and a mounting base. The signal collector is fixed to the bottom of the mounting base, the top of the mounting base passes through the floating sleeve and is fixedly connected to the floating sleeve, the antenna is mounted on the top of the mounting base, and the plurality of stable floating blocks are evenly spaced around the floating sleeve.

[0008] Furthermore, the floating sleeve has a cylindrical structure, with a through hole in the middle along the axial direction, and several axial positioning grooves are provided on the inner wall of the through hole along the circumference.

[0009] Furthermore, the mounting base includes a cylindrical body, with a limiting block at the top for engaging with the top surface of the floating sleeve, and a detachable limiting ring in the middle for engaging with the bottom surface of the floating sleeve. The side of the body between the limiting block and the limiting ring has several positioning blocks along its circumference for engaging with several positioning grooves on the floating sleeve. The signal collector is fixed to the bottom of the body, the antenna is mounted on the top of the limiting block, and the interior of the body has space for accommodating the cable connecting the signal collector and the antenna.

[0010] Furthermore, the bottom of the main body is provided with a tubular protective cover, the signal collector is located inside the protective cover, and the side of the protective cover is provided with several water-permeable holes.

[0011] Furthermore, the floating assembly has two connecting blocks and two fixing blocks on its side for limiting the rotation angle of the stabilizing floating block. The end of the stabilizing floating block is hinged to the two connecting blocks, and the two sides of one end of the stabilizing floating block are respectively connected to the two fixing blocks.

[0012] Furthermore, the fixing block includes a fixing seat, a second rotating shaft, a buoyancy block, and an inverted L-shaped rotating block. The fixing seat is fixed to the side of the floating assembly. A U-shaped groove is opened on the outer side of the fixing seat, and a square groove is opened on the top of the fixing seat. The U-shaped groove and the square groove are connected. The horizontal bar of the rotating block is located in the square groove, and the top surface of the horizontal bar is flush with the top surface of the fixing seat. The end of the horizontal bar is connected to the second rotating shaft, which is located in the square groove and its two ends are hinged to the two sides of the square groove. The vertical bar of the rotating block is located in the U-shaped groove. A space is formed between the inner side of the vertical bar and the inner wall of the U-shaped groove to accommodate the end of the limiting rod of the stabilizing floating block. The buoyancy block is fixed to the top of the horizontal bar, and the bottom surfaces on both sides of the buoyancy block are in contact with the top surface of the fixing seat.

[0013] Furthermore, the stabilizing floating block includes a connecting rod, a stabilizing block, a first rotating shaft, and a limiting rod. The stabilizing block is connected to one end of the connecting rod, and the other end of the connecting rod is perpendicularly connected to the first rotating shaft. Both ends of the first rotating shaft are hinged to the connecting blocks on the side of the floating assembly. The limiting rod is disposed on both sides of the connecting rod and arranged parallel to the first rotating shaft. The end of the limiting rod away from the connecting rod cooperates with the fixing block on the side of the floating assembly.

[0014] Furthermore, the stabilizing block has a plate-like structure.

[0015] Furthermore, when the rotation angle of the stabilizing floating block is 0, the bottom height of the stabilizing floating block is lower than the bottom height of the signal collector.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention increases the water surface contact area by setting up an expandable stable floating block, which effectively suppresses the swaying caused by water flow and waves, and improves the stability of signal acquisition. It has the advantage of increasing the water surface contact area to improve the stability of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the floating sleeve of this utility model.

[0020] Figure 3 This is a schematic diagram showing the interaction between the signal collector, antenna, and mounting base of this utility model.

[0021] Figure 4 This is a schematic diagram showing the cooperation between the stable floating block and the floating sleeve of this utility model.

[0022] Figure 5 This is a schematic diagram of the structure of the fixing block of this utility model.

[0023] In the diagram, 1-floating component; 2-floating sleeve; 2.1-through hole; 2.2-positioning groove; 3-mounting base; 3.1-body; 3.2-limiting block; 3.3-limiting ring; 3.31-stop block; 3.4-positioning block; 4-signal collector; 5-antenna; 6-stabilizing floating block; 6.1-connecting rod; 6.2-stabilizing block; 6.3-first rotating shaft; 6.4-limiting rod; 6.5-bottom; 7-protective cover; 7.1-water-permeable hole; 8-connecting block; 9-fixing block; 9.1-fixing base; 9.11-U-shaped groove; 9.12-square groove; 9.2-second rotating shaft; 9.3-buoyancy block; 9.4-rotating block; 9.41-horizontal bar; 9.42-vertical bar. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Underwater acoustic signal processing and acquisition technologies are widely used in marine environmental monitoring, underwater communication, and other fields. Existing buoy-based acquisition devices typically fix the signal collector to the bottom of the buoy. Due to the limited contact area between the device and the water surface, it is easily affected by currents and waves, resulting in significant swaying and a decline in data quality, thus affecting monitoring accuracy. In nearshore areas with strong currents or during stormy weather, traditional devices may experience violent shaking, causing the signal collector to deviate from its intended position and preventing the continuous acquisition of effective acoustic data.

[0027] To address the aforementioned issues, the inventors noted a deficiency in the existing device's structural design: insufficient water surface support points. Through analysis of fluid mechanics principles, they discovered that increasing the contact area between the device and the water surface effectively disperses the impact force of the water flow. Considering the need for portability, designing a deployable structure became crucial. After numerous experiments, it was verified that a floating block structure with rotating connections maintains a compact volume when stored and provides multi-point support when deployed. Further research revealed that evenly distributed floating blocks create symmetrical equilibrium, preventing tilting issues caused by localized forces.

[0028] Therefore, this utility model provides an underwater acoustic signal acquisition device, such as... Figure 1-5 As shown, it includes a floating assembly 1, a signal collector 4, an antenna 5, and several stabilizing floating blocks 6. The signal collector 4 is installed at the bottom of the floating assembly 1, and the antenna 5 is installed at the top of the floating assembly 1 and electrically connected to the signal collector 4 via a cable. The stabilizing floating blocks 6 are evenly distributed around the floating assembly 1 and can rotate around the connection point. When fully extended upwards, they are flush with the water surface, which can increase the contact area between the device and the water surface.

[0029] The floating assembly 1 refers to the buoyancy structure that supports the signal collector 4 and antenna 5. Specifically, it can be implemented using a hollow cylinder with a mounting base, maintaining the device's basic buoyancy on the water surface. The stabilizing float block 6 is a buoyancy component rotatably connected to the floating assembly 1. Specifically, it can be implemented using a hinged plate-shaped float, increasing stability by adding support points during deployment. The rotatable connection refers to the mechanical structure that allows the float block to rotate around an axis. Specifically, it can be implemented using a hinged connection between a rotating shaft and a bearing, allowing the float block to automatically adjust its deployment angle according to the water flow. The uniform spacing means that each stabilizing float block is equidistantly distributed along the circumference. Specifically, it can be implemented using a symmetrical layout of four or six float blocks to ensure balanced force distribution on the device.

[0030] Specifically, the floating assembly 1 provides basic buoyancy for the device, while the signal collector 4, model HTD-42, installed at the bottom and submerged in water, collects acoustic signals. The top antenna 5 transmits the data to the receiving end in real time. The stabilizing float 6, in its retracted state, adheres to or runs parallel to the side of the floating assembly 1. After deployment, it unfolds upwards to a horizontal position under buoyancy. The unfolded stabilizing float 6 forms a ring-shaped support surface, significantly increasing the contact area between the device and the water surface. When waves impact the device, multiple stabilizing floats work together to disperse the impact force. The rotating connection structure allows the floats to finely adjust their angles with the wave action, preventing excessive stress on the rigid structure. The symmetrically distributed floats form a dynamic balance system, effectively suppressing lateral displacement and rotational swaying of the device, ensuring the signal collector maintains a stable operating posture.

[0031] Compared to existing technologies, traditional buoys rely on a single floating body for balance, while this solution uses multiple deployable floating blocks to form a distributed support structure. Existing devices are prone to tilting in wavy environments, causing signal collector misalignment; this solution utilizes symmetrically arranged floating blocks to automatically counteract tilting moments. Traditional structures cannot adjust the support area according to water flow intensity; the rotating connecting floating blocks in this solution can fully deploy to their maximum angle in strong currents and partially retract in calm waters to reduce resistance.

[0032] Through the above technical solutions, this utility model effectively reduces the impact of water flow and waves on the stability of the device. By increasing the contact area, the impact force is dispersed, reducing the swaying amplitude of the device. The deployed floating block forms a ring-shaped support structure, suppressing lateral displacement and rotational swaying of the device, ensuring that the signal collector is always in the optimal working position. The rotating connection design allows the device to adapt to water flow environments of varying intensities, ensuring stability while also facilitating storage and transportation.

[0033] This utility model further proposes a technical solution for the floating component 1, which includes a floating sleeve 2 and a mounting base 3. The signal collector 4 is fixed to the bottom of the mounting base 3, the top of the mounting base 3 passes through the floating sleeve 2 and is fixedly connected to the floating sleeve 2, the antenna 5 is installed on the top of the mounting base 3, and several stable floating blocks 6 are evenly spaced around the floating sleeve 2.

[0034] The floating sleeve 2 is a hollow structure that provides the main buoyancy. It can be made of cylindrical foam material, and its through-hole allows the mounting base to be axially fixed through it. The increased lateral cross-sectional area enhances its anti-overturning ability. The mounting base 3 is a rigid support structure that supports the signal collector 4 and the antenna 5. It can be made of metal tubing. Its structure, which penetrates the floating sleeve 2, forms vertical constraints to ensure that the signal collector 4 and the antenna 5 maintain a vertical alignment. The stabilizing floating block 6 is a deployable auxiliary buoyancy unit. It can be made of hinged plastic plates and is evenly arranged around the floating sleeve to disperse the impact force of the water flow.

[0035] Specifically, the floating sleeve 2 and the mounting base 3 form a separate structure. The mounting base 3 passes through the floating sleeve 2 and is bidirectionally fixed by the top limiting block 3.2 and the bottom limiting ring 3.3. This rigid connection method avoids the relative displacement caused by the separation of components in traditional buoy structures. The signal collector is directly fixed to the bottom of the mounting base, and the antenna is set at the top of the mounting base. The two transmit signals through wiring in the internal cavity of the mounting base, eliminating the risk of external cable entanglement. Stabilizing floating blocks are evenly distributed around the circumference of the floating sleeve. When the device is impacted by waves, multiple stabilizing floating blocks deploy simultaneously to form distributed support, reducing the device's sway amplitude by increasing the water surface contact area.

[0036] This solution utilizes a split-type floating sleeve 2 and mounting base 3 structure to achieve rigid fixation of the core components and concealed wiring. Simultaneously, the surrounding stabilizing floating blocks 6 provide multi-point support in the deployed state, significantly improving the device's resistance to water flow disturbance. Through the above technical solution, this invention effectively solves the problem of signal distortion caused by structural instability in buoy devices. The through-type fixing structure of the mounting base and floating sleeve ensures that the signal collector always maintains the predetermined working depth, and the circumferentially distributed stabilizing floating blocks work together to suppress device deflection, thereby improving the accuracy and continuity of underwater acoustic signal acquisition.

[0037] This utility model further proposes that the floating sleeve 2 is a cylindrical structure, and the floating sleeve 2 has a through hole 2.1 in the middle along the axial direction, and a number of positioning grooves 2.2 are provided on the inner wall of the through hole 2.1.

[0038] Among them, the cylindrical structure refers to an axisymmetric geometric shape with a circular cross-section, which can be achieved by injection molding. Its symmetry helps to evenly disperse the impact force of water flow.

[0039] Among them, through hole 2.1 refers to the hole structure that runs through the central axis of the floating sleeve. Specifically, it can be achieved by mechanical drilling. This structure can reduce the overall weight and provide an installation channel.

[0040] Among them, the positioning groove 2.2 refers to the groove structure that extends longitudinally along the inner wall of the through hole. It can be specifically processed by milling and forms a mechanical fitting relationship with the positioning block on the mounting base.

[0041] Specifically, the cylindrical structure, through its axisymmetric properties, ensures uniform force distribution on the floating sleeve on the water surface, reducing the risk of tilting due to localized pressure concentration. The through-hole structure, while reducing its own weight, creates an installation channel, allowing the mounting base to be inserted axially and form a tight fit with the inner wall of the through-hole. Positioning grooves are longitudinally distributed along the inner wall of the through-hole, forming a circumferential constraint with the positioning blocks on the surface of the mounting base. When the mounting base is inserted into the through-hole, the positioning blocks embed into the positioning grooves, preventing relative rotation due to water flow impact.

[0042] This solution achieves longitudinal positioning through a cylindrical structure and through-hole, while the interlocking relationship between the positioning groove and the positioning block creates circumferential constraint, thus fixing the mounting base and the floating sleeve in three-dimensional space. Through this technical solution, the present invention solves the problem of insufficient stability in the connection between the mounting base and the floating sleeve, preventing the signal acquisition device from shifting due to relative displacement, thereby improving the accuracy of underwater acoustic signal acquisition data. The interlocking structure of the positioning groove and the positioning block effectively resists rotational torque, ensuring the device maintains stable operation in complex water flow environments.

[0043] This utility model further proposes that the mounting base 3 includes a cylindrical body 3.1, with a limiting block 3.2 at the top of the body 3.1 for engaging with the top surface of the floating sleeve 2, and a detachable limiting ring 3.3 in the middle of the body 3.1 for engaging with the bottom surface of the floating sleeve 2. The side of the body 3.1 between the limiting block 3.2 and the limiting ring 3.3 is provided with several positioning blocks 3.4 along the circumference for engaging with several positioning grooves 2.2 on the floating sleeve 2. The signal collector 4 is fixed to the bottom of the body 3.1, and the antenna 5 is installed on the top of the limiting block 3.2. The body 3.1 has a space inside to accommodate the cable connecting the signal collector 4 and the antenna 5.

[0044] Among them, the cylindrical body 3.1 refers to a cylindrical structure with a circular axial cross section. Specifically, it can be made of metal or engineering plastic and is used to form a coaxial fit with the through hole of the floating sleeve 3.2 to realize the axial positioning of the mounting base 3 and the floating sleeve 2.

[0045] Among them, the limiting block 3.2 refers to the protruding structure set at the top of the body 3.1. Specifically, it can be an annular boss integrally formed with the body 3.1, used to contact the top surface of the floating sleeve 2 and restrict the downward movement of the mounting base 3.

[0046] The detachable limiting ring 3.3 is a ring-shaped component fitted around the middle of the main body 3.1. Specifically, it can be a split retaining ring or a threaded fastening ring, used to contact the bottom surface of the floating sleeve 2 and restrict the upward movement of the mounting base 3. The limiting ring 3.3 is provided with stop blocks 3.31 around its perimeter, which can further enhance the limiting effect.

[0047] Among them, the positioning block 3.4 refers to the protruding structure distributed circumferentially along the side of the body 3.1. Specifically, it can be a rectangular or trapezoidal protrusion, used to embed into the positioning groove 2.2 of the inner wall of the floating sleeve 2 to prevent the mounting base 3 from rotating relative to the floating sleeve 2.

[0048] The cable accommodating space refers to the cavity arranged axially inside the main body 2.1, which can be achieved through a hollow cylindrical structure or internal slots, and is used to centrally store the connecting cable between the signal collector 4 and the antenna 5.

[0049] Specifically, after the cylindrical body 3.1 is inserted into the through hole 2.1 of the floating sleeve 2, the top limiting block 3.2 abuts against the top surface of the floating sleeve 2, and the detachable limiting ring 3.3 in the middle is fixed to the bottom surface of the floating sleeve 2 by threads or snaps, forming a bidirectional clamping structure to ensure the vertical fixation of the mounting base 3 and the floating sleeve 2. The positioning block 3.4 on the side of the body 3.1 is embedded in the positioning groove 2.2 on the inner wall of the floating sleeve 2, limiting the circumferential displacement between the mounting base 3 and the floating sleeve 2. The signal collector 4 is fixed to the bottom of the body 3.1, and the antenna 5 is installed on the top of the limiting block 3.2. The connecting cable between the two is routed through the cable receiving space inside the body 3.1 to avoid the cable being exposed to the external environment. The design of the detachable limiting ring 3.3 allows the mounting base to be disassembled during maintenance, facilitating the inspection and repair of the signal collector or antenna.

[0050] This design utilizes a double clamping mechanism formed by the limiting block 3.2 and the detachable limiting ring 3.3, combined with the circumferential limiting of the positioning block 3.4 and the positioning groove 2.2, significantly enhancing the connection stability between the mounting base 3 and the floating sleeve 2. The cable accommodating space encapsulates the electrical connection lines within the main body 3.1, eliminating reliability issues caused by exposed cables. Through the above technical solutions, this invention solves the problem of insufficient connection stability between the mounting base 3 and the floating sleeve 2. The cooperation of the upper and lower limiting structures and the circumferential positioning block effectively suppresses mechanical displacement of the device when it sways on the water surface. Simultaneously, the internal cable accommodating space provides centralized protection for signal transmission lines, preventing cable breakage or short circuits due to external environmental interference, thereby improving the overall reliability of the device.

[0051] The present invention further proposes that the bottom of the main body 3.1 is provided with a tubular protective cover 7, the signal collector 4 is located inside the protective cover 7, and the side of the protective cover 7 is provided with several water-permeable holes 7.1.

[0052] The tubular protective cover 7 refers to the cylindrical shell that surrounds the signal collector 4. It can be made of stainless steel or engineering plastic and its axial extension direction is coaxial with the bottom of the main body 3.1. It is fixed to the bottom of the main body 3.1 by a ring buckle or threaded connection. This structure disperses the impact force of external water flow through a rigid shell, preventing the signal collector from being directly subjected to force.

[0053] The permeable hole 7.1 refers to the through hole penetrating the side wall of the protective cover 7. Specifically, it can be implemented using circular, elliptical, or elongated holes, for example, three to five rows of through holes evenly distributed along the circumference of the protective cover 7. This design allows water to flow through the interior of the protective cover 7, avoiding the formation of a closed space that interferes with the sound wave propagation path, while utilizing the edges of the holes to generate a damping effect on the water flow.

[0054] Specifically, the tubular structure of the protective cover 7 completely encloses the signal collector 4 within its internal cavity. When the device is underwater, the impact force of the water flow first acts on the outer surface of the protective cover, and the impact energy is dispersed through the curved deformation of the tube wall. The water-permeable holes 7.1 form continuous water flow channels on the side of the protective cover, allowing external water to freely enter and exit the interior of the protective cover, eliminating acoustic wave reflection interference caused by the confined space. The axial extension length of the protective cover 7 can be set to cover all sensitive elements of the signal collector. The aperture size and distribution density of the water-permeable holes 7.1 are calculated to match the wavelength range of the underwater acoustic signal, maintaining the continuity of sound wave propagation while ensuring structural strength.

[0055] This solution, through the coordinated design of a tubular protective cover and permeable holes, achieves both physical protection and maintains acoustic performance, resolving the contradiction between protection and signal fidelity. Using this technical solution, the present invention can effectively prevent mechanical damage to the signal collector caused by impacts from floating objects in the underwater environment, reduce the device sway caused by turbulence, and maintain the normal propagation path of the underwater acoustic signal through the permeable holes, thus avoiding any negative impact of the protective structure on acoustic acquisition performance.

[0056] This utility model further proposes that the floating component 1 is provided with two connecting blocks 8 and two fixing blocks 9 on its side. The end of the stabilizing floating block 6 is hinged to the two connecting blocks 8, and one end of the stabilizing floating block 6 is respectively connected to the two fixing blocks 9 on both sides. The fixing block 9 includes a fixing seat 9.1, a second rotating shaft 9.2, a buoyancy block 9.3, and an inverted L-shaped rotating block 9.4. The fixing seat 9.1 is fixed to the side of the floating sleeve 2 of the floating component 1. A U-shaped groove 9.11 is opened on the outer side of the fixing seat 9.1, and a square groove 9.12 is opened on the top. The U-shaped groove 9.11 and the square groove 9.12 are connected. The crossbar 9.41 of the rotating block 9.4 is located in the square groove 9.12, and the top surface of the crossbar 9.41 is flush with the top surface of the fixing seat 9.1. The end of 41 is connected to the second rotating shaft 9.2, which is located inside the square groove 9.12 and is hinged to both ends of the square groove 9.12. The vertical rod 9.42 of the rotating block 9.4 is located inside the U-shaped groove 9.11. The inner side of the vertical rod 9.42 and the inner wall of the U-shaped groove 9.11 form a space to accommodate the end of the limiting rod 6.4 of the stable floating block 6. The buoyancy block 9.3 is fixed to the top of the horizontal rod 9.41, and the bottom surfaces of both sides of the buoyancy block 9.3 are in contact with the top surface of the fixed seat 9.1.

[0057] The connecting block 8 is a support structure used to achieve a hinged connection between the stabilizing float block 6 and the floating assembly 1. It can be a block-shaped component made of metal or engineering plastic, forming a rotating pair with the stabilizing float block via a hinge shaft. The fixing block 9 is a mechanical limiting structure used to restrict the rotation angle of the stabilizing float block 6. It is a composite mechanism consisting of a fixing seat 9.1, a rotating block 9.4, and a buoyancy block 9.3. The fixing seat 9.1 is a base fixed to the side of the floating assembly to support the rotating block 9.4 and the buoyancy block 9.1. It can be fixed by bolts or welding, and is made of cast aluminum alloy. Its outer U-shaped groove 9.11 communicates with the top square groove 9.13, providing movement space for the rotating block 9.4. The second rotating shaft 9.2 is a rotating support component located within the square groove 9.12, connecting the rotating block 9.4 and the fixing seat 9.1. It can use stainless steel bearings or nylon bushings to achieve low-friction rotation, allowing the rotating block to rotate around the shaft. The buoyancy block 9.3 refers to the component that provides buoyancy to drive the rotation of the rotating block 9.4. Specifically, it can be made of foamed material or a hollow sealed structure, and the buoyancy drives the rotating block 9.4 to rotate around the second rotating shaft 9.2. The rotating block 9.4 refers to the limiting component with an inverted L-shaped structure composed of a horizontal bar 9.41 and a vertical bar 9.42. Specifically, it can be made of nylon material through injection molding. Its horizontal bar 9.41 is connected to the second rotating shaft 9.2 to form a rotation fulcrum, and its vertical bar 9.42 forms a space to accommodate the limiting rod 6.4 of the stable floating block 6 by cooperating with the inner wall of the U-shaped groove 9.11.

[0058] Specifically, when the data collection device is placed in the water, the buoyancy block 9.3 rises upward under the buoyancy of the water, causing the horizontal bar 9.41 to rotate around the second pivot 9.2. This, in turn, causes the vertical bar 9.1 to rotate and move outward from the U-shaped groove 9.11, releasing the fixation of the limiting rod 6.1. This allows the stabilizing block 6.2 to rotate upward around the first pivot 6.3 due to buoyancy. After the stabilizing block 6.2 floats to the surface, it provides buoyancy to the floating sleeve 2, making the entire device float more stably on the water surface. During the upward rotation of the stabilizing block 6.2, since the maximum rotation angle of the rotating block 6.4 is 90° (when rotating 90°, the horizontal bar 9.41 will abut against the side wall of the square groove 9.12, forming a rigid... The limiting rod 6.4 remains below the vertical rod 9.42 throughout the rotation of the stabilizing block 6.2, thus the maximum rotation angle of the stabilizing block 6.2 is 90°. After the device is removed from the water, the buoyancy block 9.3 loses its buoyancy support, the rotating block 9.4 resets under gravity, the vertical rod 9.42 returns to its initial position in the U-shaped groove 9.11, and the stabilizing block 6.2 also rotates downwards due to gravity, causing the limiting rod 6.4 to enter the space formed by the vertical rod 9.42 and the U-shaped groove 9.11. The rotating block 9.4 will not rotate without external force; therefore, the limiting rod 6.4 and the corresponding stabilizing block 6.2 are fixed by the rotating block and will not rotate. Through the dual action of mechanical limiting and buoyancy drive, the rotation angle of the stabilizing floating block is strictly controlled within the design range.

[0059] This design, through the synergistic action of the fixed block 9 and the connecting block 8, effectively avoids unexpected angular deviations caused by water flow impact after the stabilizing floating block 6 is deployed. The dual action of buoyancy drive and mechanical limiting maintains the device's balance on the water surface, thereby improving the device's anti-interference capability and data acquisition stability during underwater acoustic signal acquisition. The coordinated design of the rotating block 6.4 with the U-shaped groove 9.11 and the square groove 9.12 ensures the stability of the deployment angle and provides a reliable reset path for device retrieval, ultimately achieving stable attitude of the acquisition device during water surface operation.

[0060] This utility model further proposes a stabilizing floating block 6 including a connecting rod 6.1, a stabilizing block 6.2, a first rotating shaft 6.3, and a limiting rod 6.4. The stabilizing block 6.2 is connected to one end of the connecting rod 6.1, and the other end of the connecting rod 6.1 is perpendicularly connected to the first rotating shaft 6.3. The two ends of the first rotating shaft 6.3 are respectively hinged to two connecting blocks 8 on the side of the floating assembly 1. The limiting rod 6.4 is disposed on both sides of the connecting rod 6.1 and arranged parallel to the first rotating shaft 6.3. The end of the limiting rod 6.4 away from the connecting rod cooperates with the fixing block 9 on the side of the floating assembly 1.

[0061] The connecting rod 6.1 is a rigid rod connecting the stabilizing block 6.2 and the first rotating shaft 6.3. It can be made of aluminum alloy tubing and converts the unfolding motion of the stabilizing block 6.2 into rotational motion around the first rotating shaft 6.3. The stabilizing block 6.2 is a planar plate-like structure, which can be made of foamed polyethylene material. It suppresses device swaying by increasing the water surface contact area. The first rotating shaft 6.3 is a rotating shaft perpendicular to the connecting rod. It can be made of stainless steel pins, allowing the stabilizing block to rotate 0-90 degrees around the floating assembly. The limiting rod 6.4 is a constraint rod arranged parallel to the first rotating shaft. It can be injection molded from nylon material and limits the unfolding angle of the stabilizing block through mechanical cooperation with the fixed block.

[0062] Specifically, when the stabilizing block 6.2 is in its retracted state, the connecting rod 6.1 is either in contact with or parallel to the side of the floating assembly. When the device is deployed to the water surface, the water flow pushes the stabilizing block 6.2 to unfold around the first rotating shaft 6.3. The limiting rod 6.4 rotates synchronously with the connecting rod 6.1 until it reaches its maximum angle. At this point, the side of the stabilizing block 6.2 is fully unfolded to form a horizontal support surface. Through the hinged structure between the first rotating shaft 6.3 and the connecting block 8, the stabilizing block 6.2 can adaptively adjust its unfolding angle according to the wave direction. The cooperation between the limiting rod 6.4 and the fixing block 9 ensures that the unfolded stabilizing block maintains a preset angle (i.e., not exceeding 90 degrees).

[0063] This design utilizes a deployable stabilizing floating block 6 structure to extend the water surface contact area to the perimeter of the floating assembly. Simultaneously, the cooperation between the limiting rod 6.4 and the fixing block 9 forms a rigid constraint, preventing excessive swaying of the stabilizing block due to wave impact. Through this technical solution, the present invention achieves precise positioning of the stabilizing floating block 6 in its deployed state, increasing the water surface contact area of ​​the device to 2-3 times the projected area of ​​the floating assembly body, effectively suppressing the lateral swaying amplitude of the device. The cooperation between the limiting rod and the fixing block ensures the stability of the stabilizing block's deployment angle, preventing angular deviation caused by water flow impact. The planar plate design of the stabilizing block enhances the water surface adsorption effect, further reducing the vertical swaying amplitude of the device.

[0064] This utility model further proposes that the stabilizing block 6.2 adopts a plate-like structure and the bottom 6.5 of the plate-like structure is a plane.

[0065] Among them, plate-like structures refer to geometric shapes with length and width dimensions significantly larger than thickness. Specifically, they can be achieved by molding engineering plastics, and their lateral extension characteristics can increase the effective contact area with the water surface.

[0066] The bottom section 6.5 represents the bottom of the stabilizing block 6.2 when it is not deployed and is in a vertical position; that is, the bottom of the stabilizing floating block 6. The bottom is designed to be flat. When the data collection device is removed from the water, it contacts the ground surface through the flat surfaces of the bottoms of multiple stabilizing blocks 6.2, increasing the stability of the device. The plate-like structure can be square or circular. If it is circular, a portion of the bottom can be cut off to form a flat surface, or a long strip structure can be added to the bottom to form a flat surface, ensuring that the bottom of the plate-like structure is flat.

[0067] Specifically, in its fully deployed state, the side of the stabilizing block 6.2, with its plate-like structure, forms a continuous support surface in contact with the water surface. When the device is impacted by water flow or waves, the increased contact area disperses the lateral force, reducing the pressure per unit area. Simultaneously, the geometric characteristics of the plate-like structure provide sufficient structural strength in the vertical direction, enabling the stabilizing block to withstand dynamic loads without deformation. During the device's recovery and placement, the bottom planes of multiple stabilizing blocks collectively form a support surface in contact with the ground, preventing the device from tipping over due to a shift in its center of gravity.

[0068] This invention further proposes that when the rotation angle of the stabilizing floating block 6 is 0, the bottom height of the stabilizing floating block 6 is lower than the bottom height of the signal collector 4. When the signal collector 4 is provided with a protective cover 7, the bottom height of the stabilizing floating block 6 is lower than the bottom height of the protective cover 7.

[0069] The fact that the stabilizing floating block 6 rotates at an angle of 0 means that the stabilizing floating block 6 is in an undeployed state, at which time the stabilizing floating block remains parallel to the side of the floating component.

[0070] The phrase "the bottom height is lower than the bottom height of the signal collector 4 (or the bottom height of the protective cover 7)" refers to the vertical distance between the lowest point of the stabilizing floating block and the bottom of the signal collector 4 (or the bottom of the protective cover 7) when the stabilizing floating block is not deployed. This can be achieved by adjusting the length of the stabilizing floating block 6 or the installation position of the hinge point, so that the stabilizing floating block 6 will preferentially contact the support surface when the device is placed on the ground, thus reducing the risk of damage to the signal collector.

[0071] Specifically, when the device is removed from the water and placed on the ground, the stabilizing float 6 is in an indeployed state, with its bottom end lower than the bottom of the signal collector 4. At this time, the stabilizing float 6 acts as a support structure, directly contacting the ground to prevent the signal collector 4 from colliding or rubbing against the ground. When the device is submerged in water, the stabilizing float 6 expands outward to its maximum angle under the action of buoyancy. At this time, the side of the stabilizing float 6 is submerged below the water surface, increasing the contact area between the device and the water surface.

[0072] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Contents not described in detail in this specification belong to prior art known to those skilled in the art.

Claims

1. A water acoustic signal acquisition device, characterized in that: The device includes a floating assembly (1), a signal collector (4), an antenna (5), and several stable floating blocks (6) that can be expanded upward to increase the contact area between the collection device and the water surface. The signal collector (4) is installed at the bottom of the floating assembly (1), and the antenna (5) is installed at the top of the floating assembly (1). The output end of the signal collector (4) is electrically connected to the antenna (5). The several stable floating blocks (6) are evenly spaced around the floating assembly (1), and one end of the stable floating block (6) is rotatably connected to the side of the floating assembly (1).

2. The underwater acoustic signal acquisition device according to claim 1, characterized in that: The floating assembly (1) includes a floating sleeve (2) and a mounting base (3). The signal collector (4) is fixed to the bottom of the mounting base (3). The top of the mounting base (3) passes through the floating sleeve (2) and is fixedly connected to the floating sleeve. The antenna (5) is installed on the top of the mounting base (3). The several stable floating blocks (6) are evenly spaced around the floating sleeve (2).

3. The underwater acoustic signal acquisition device according to claim 2, characterized in that: The floating sleeve (2) is a cylindrical structure. A through hole (2.1) is provided in the middle of the floating sleeve (2) along the axial direction. Several axial positioning grooves (2.2) are provided on the inner wall of the through hole (2.1) along the circumference.

4. The underwater acoustic signal acquisition device according to claim 2, characterized in that: The mounting base (3) includes a cylindrical body (3.1), the top of the body (3.1) is provided with a limiting block (3.2) for cooperating with the top surface of the floating sleeve, the middle of the body (3.1) is provided with a detachable limiting ring (3.3) for cooperating with the bottom surface of the floating sleeve, and the side of the body (3.1) between the limiting block (3.2) and the limiting ring (3.3) is provided with several positioning blocks (3.4) along the circumference for cooperating with several positioning grooves (2.2) on the floating sleeve (2); the signal collector (4) is fixed to the bottom of the body (3.1), the antenna (5) is installed on the top of the limiting block (3.2), and the interior of the body (3.1) is provided with a space to accommodate the cable connecting the signal collector (4) and the antenna (5).

5. The underwater acoustic signal acquisition device according to claim 4, characterized in that: The bottom of the main body (3.1) is provided with a tubular protective cover (7), the signal collector (4) is located inside the protective cover (7), and the protective cover (7) is provided with several water-permeable holes (7.1) on its side.

6. The underwater acoustic signal acquisition device according to claim 1, characterized in that: The floating component (1) has two connecting blocks (8) and two fixing blocks (9) on its side for limiting the rotation angle of the stabilizing floating block (6). The end of the stabilizing floating block (6) is hinged to the two connecting blocks (8), and the two sides of one end of the stabilizing floating block (6) are respectively connected to the two fixing blocks (9).

7. The underwater acoustic signal acquisition device according to claim 6, characterized in that: The fixing block (9) includes a fixing seat (9.1), a second rotating shaft (9.2), a buoyancy block (9.3), and an inverted L-shaped rotating block (9.4). The fixing seat (9.1) is fixed to the side of the floating component. A U-shaped groove (9.11) is opened on the outside of the fixing seat (9.1), and a square groove (9.12) is opened on the top of the fixing seat (9.1). The U-shaped groove (9.11) and the square groove (9.12) are connected. The crossbar (9.41) of the rotating block (9.4) is located in the square groove (9.12), and the top surface of the crossbar (9.41) is connected to the top surface of the fixing seat (9.1). The horizontal bar (9.41) is connected to the second rotating shaft (9.2) at the end. The second rotating shaft (9.2) is located in the square groove (9.12) and its two ends are hinged to the two sides of the square groove. The vertical bar (9.42) of the rotating block (9.4) is located in the U-shaped groove (9.11). The inner side of the vertical bar (9.42) and the inner wall of the U-shaped groove (9.11) form a space to accommodate the end of the limiting rod of the stable floating block (6). The buoyancy block (9.3) is fixed to the top of the horizontal bar (9.41). The bottom surfaces of the two sides of the buoyancy block (9.3) are in contact with the top surface of the fixed seat (9.1).

8. The underwater acoustic signal acquisition device according to claim 1, characterized in that: The stabilizing floating block (6) includes a connecting rod (6.1), a stabilizing block (6.2), a first rotating shaft (6.3), and a limiting rod (6.4). The stabilizing block (6.2) is connected to one end of the connecting rod (6.1), and the other end of the connecting rod (6.1) is perpendicularly connected to the first rotating shaft (6.3). Both ends of the first rotating shaft (6.3) are hinged to the connecting blocks on the side of the floating assembly. The limiting rod (6.4) is located on both sides of the connecting rod (6.1) and is arranged parallel to the first rotating shaft (6.3). The end of the limiting rod (6.4) away from the connecting rod (6.1) cooperates with the fixing block on the side of the floating assembly (1).

9. The underwater acoustic signal acquisition device according to claim 8, characterized in that: The stabilizer block (6.2) has a plate-like structure.

10. The underwater acoustic signal acquisition device according to claim 1, characterized in that: When the rotation angle of the stabilizing floating block (6) is 0, the bottom height of the stabilizing floating block (6) is lower than the bottom height of the signal collector (4).

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