Signal amplifier of pressure-resistant hydrophone

Abstract

The invention relates to the technical field of signal amplification, in particular to a signal amplifier of a pressure-resistant hydrophone, and the signal amplifier comprises a shell which comprises an outer shell and an inner shell, the outer shell is of an annular hollow structure, the outer shell and the inner shell are fixedly connected through a pressure-resistant mechanism, and the pressure-resistant mechanism is annularly arranged between the outer shell and the inner shell; a cushioning mechanism is further arranged between the outer shell and the inner shell, the cushioning mechanism is annularly arranged between the outer shell and the inner shell, the sealing mechanism is located in the inner shell and the outer shell, the amplifying mechanism is located in the inner shell, and the amplifying mechanism and the inner shell are connected in a matched mode through the sealing mechanism; the stability of the structure under the dynamic load is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of signal amplification, and in particular to a signal amplifier of a pressure-resistant hydrophone. Background Art

[0002] A hydrophone is a sensor that converts underwater acoustic signals into electrical signals. It is widely used in fields such as ocean exploration, communications, navigation, and environmental monitoring. Because underwater sound waves are the primary carrier of information, the performance of the hydrophone directly determines the sensitivity and reliability of the underwater acoustic system. Signal amplifiers, as the core components of hydrophone systems, must amplify, filter, and condition weak electrical signals in extreme environments to ensure the accuracy of subsequent processing (such as digitization or transmission). When operating in the deep sea, the amplifier design must withstand extreme conditions such as high pressure, corrosion, and low temperatures.

[0003] However, due to the unpredictable deep-sea environment, existing signal amplifiers for hydrophones will cause drastic changes in hydrostatic pressure if the signal amplifier dives or surfaces rapidly during use. Traditional static sealing structures (such as O-rings) will not be able to respond to pressure fluctuations in a timely manner due to material creep lag, resulting in leakage in the micro-gaps of the sealing surface. At the same time, the impact of ocean currents or the falling of equipment will generate non-uniformly distributed transient impact forces. The existing signal amplifiers have insufficient pressure resistance, which can easily cause the inner shell to deform and squeeze the internal circuit.

[0004] Therefore, there is an urgent need for a pressure-resistant hydrophone signal amplifier to solve the problems existing in the current technology. Summary of the Invention

[0005] In view of this, the present invention proposes a signal amplifier for a pressure-resistant hydrophone, aiming to solve the problem of poor anti-impact robustness of existing signal amplifiers.

[0006] The present invention provides a signal amplifier for a pressure-resistant hydrophone, comprising:

[0007] The shell includes an outer shell and an inner shell, the outer shell is an annular hollow structure, the outer shell and the inner shell are fixedly connected by a pressure-resistant mechanism, and the pressure-resistant mechanism is annularly arranged between the outer shell and the inner shell, a shock-absorbing mechanism is also provided between the outer shell and the inner shell, and the shock-absorbing mechanism is annularly arranged between the outer shell and the inner shell, a sealing mechanism is located between the inner shell and the outer shell, the amplification mechanism is located inside the inner shell, and the amplification mechanism and the inner shell are cooperatively connected by the sealing mechanism.

[0008] Furthermore, the pressure-resistant mechanism includes a reinforcement ring and a longitudinal reinforcement rib, the longitudinal reinforcement rib is located between the outer shell and the inner shell, and the longitudinal reinforcement rib is fixedly connected to the outer shell and the inner shell, the reinforcement ring is located at both ends of the outer shell and the inner shell, and the reinforcement ring is fixedly connected to the outer shell and the inner shell.

[0009] Furthermore, the shock-absorbing mechanism includes a reinforcing column and a shock-absorbing part. The reinforcing column is fixedly connected to the inner shell. There are several reinforcing columns, and several of the reinforcing columns are located between the longitudinal reinforcing ribs. The shock-absorbing part is provided in each of the reinforcing columns.

[0010] Furthermore, the shock-absorbing part includes a connecting column, a sliding plate, a torsion spring, a sliding groove and a limit plate. The sliding groove is arranged in the reinforcing column. The interior of the sliding groove is vertically slidably connected to the sliding plate. A torsion spring is arranged between the lower surface of the sliding plate and the bottom wall of the sliding groove, and a connecting column is arranged on the upper surface of the sliding plate. The upper ends of the connecting columns pass through the reinforcing columns and are fixedly connected to the outer shell.

[0011] Furthermore, the inner shell includes a groove, an inner partition and an inner liner. Inner partitions are provided on both sides of the inner shell. The inner partitions are fixedly connected to the inner wall of the inner shell. The grooves are located at both ends of the inner shell, and the inner liner is provided between the two inner partitions.

[0012] Furthermore, the amplifying mechanism includes an insulating part and an amplifying part, the insulating part is located at both ends of the inner shell, and the insulating part is fixedly connected to the inner wall of the inner shell, the amplifying part passes through both ends of the inner shell, and the amplifying part is fixedly connected to the insulating part.

[0013] Furthermore, the insulating part includes an insulating seat, a first through hole and a second through hole. The insulating seat is located in the groove and is fixedly connected to the inner wall of the groove and the inner partition respectively. The insulating seat is penetrated by a first through hole, and the inner partition is penetrated by a second through hole.

[0014] Furthermore, the amplifying part includes a pin, a wire and a processing device, the pin is located in the first through hole, and the pin is fixedly connected to the insulating seat, a section of the wire passes through the first through hole and is fixedly connected to the pin, and the other end of the wire passes through the second through hole and is fixedly connected to the processing device, and the processing device is located in the inner tank.

[0015] Furthermore, it is characterized in that the sealing mechanism includes epoxy resin, the epoxy resin is filled between the outer shell and the inner shell, and the epoxy resin is also filled in the inner liner.

[0016] Furthermore, the sealing mechanism also includes sealant, and the sealant is filled in the groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the annular double shell structure in the present invention constructs a multi-level pressure-bearing system through the spatial layered structure of the outer shell and the inner shell. The pressure-resistant mechanism is evenly distributed between the inner and outer shells in the form of an annular array, forming a continuous mechanical support network, converting the external hydrostatic pressure from a point load to a surface load, thereby realizing the dispersion and transmission of pressure. The outer shell serves as the main load-bearing layer to resist environmental pressure, and the inner shell is indirectly protected by the rigid connection of the pressure-resistant mechanism. The double protection structure reduces the risk of overall deformation of the shell. The annular layout of the shock-absorbing mechanism introduces an elastic buffering function on the basis of the pressure-resistant structure, absorbs instantaneous impact energy through periodic deformation, and avoids external vibration from being directly transmitted to the internal core components through the rigid connection. The synergistic effect of the double shell and the pressure-resistant and shock-absorbing mechanisms enables the equipment to withstand continuous high pressure while having the redundant ability to cope with sudden impacts, thereby enhancing the stability of the structure under dynamic loads. The sealing mechanism between the outer shell and the inner shell forms the first barrier to block the seawater infiltration path; the secondary seal between the inner shell and the amplification mechanism further enhances the protection level of the key area. The annular sealing layout ensures the continuity of circumferential protection, and the buffer gap formed by the hollow structure alleviates the instantaneous impact of pressure fluctuations on the sealing interface. It not only prevents the intrusion of external media and causes circuit short circuit or corrosion, but also reduces the interference of internal sensitive components caused by temperature and humidity changes. The amplification mechanism is completely placed inside the inner shell, and the physical fixation and interface stability of the electrical connection are achieved through the sealing mechanism. The independent cavity formed by the inner shell isolates external electromagnetic interference and mechanical vibration, providing a low-noise working environment for signal processing. The pressure-resistant mechanism and shock-absorbing mechanism not only avoid the stress concentration of the circuit board caused by shell deformation, but also suppress the signal baseline drift caused by external vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0019] Figure 1 A schematic cross-sectional view of a signal amplifier of a pressure-resistant hydrophone provided by an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of a damping mechanism in a signal amplifier of a pressure-resistant hydrophone provided by an embodiment of the present invention.

[0021] Among them: 1. Outer shell; 2. Inner shell; 201. Groove; 202. Inner partition; 203. Inner liner; 3. Anti-pressure mechanism; 301. Reinforcement ring; 302. Longitudinal reinforcement rib; 4. Shock-absorbing mechanism; 401. Reinforcement column; 402. Connecting column; 403. Sliding plate; 404. Torsion spring; 405. Slide groove; 406. Limiting plate; 5. Sealing mechanism; 6. Amplification mechanism; 6011. Insulating seat; 6012. First through hole; 6013. Second through hole; 6021. Pin; 6022. Wire; 6023. Processing device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0023] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0026] See Figure 1-2As shown, this embodiment provides a signal amplifier for a pressure-resistant hydrophone, comprising: a housing, comprising an outer housing 1 and an inner housing 2, the outer housing 1 being an annular hollow structure, the outer housing 1 and the inner housing 2 being fixedly connected via a pressure-resistant mechanism 3, and the pressure-resistant mechanism 3 being annularly arranged between the outer housing 1 and the inner housing 2, a shock-absorbing mechanism 4 being further arranged between the outer housing 1 and the inner housing 2, and the shock-absorbing mechanism 4 being annularly arranged between the outer housing 1 and the inner housing 2, a sealing mechanism 5 being located within the inner housing 2 and the outer housing 1, the amplifying mechanism 6 being located inside the inner housing 2, and the amplifying mechanism 6 being cooperatively connected to the inner housing 2 via the sealing mechanism 5.

[0027] Specifically, a gap is left between the outer shell 1 and the inner shell 2, and a pressure-resistant mechanism 3 and a shock-absorbing mechanism 4 are arranged in the gap. At the same time, the gap is sealed by a sealing mechanism 5, and the amplification mechanism 6 is located inside the inner shell 2 and is also sealed by the sealing mechanism 5.

[0028] As can be understood, the combined annular double hull structure and pressure-resistant mechanism 3, through the layered layout of the outer hull 1 and inner hull 2, transforms external hydrostatic pressure from a single-point load to a multi-level distribution. The pressure-resistant mechanism 3 is evenly distributed in a circular array across the hull gap, forming a continuous rigid support network that transmits and balances external loads, reducing the risk of localized stress concentration. The outer hull 1 serves as the primary load-bearing layer to resist environmental pressure, while the inner hull 2 ​​is indirectly protected by the pressure-resistant mechanism 3. This dual-protection structure prevents damage to internal components caused by hull deformation. The shock-absorbing mechanism 4 incorporates an elastic buffering function in addition to its pressure-resistant properties. It absorbs transient impact energy through periodic deformation and mitigates vibration transmission caused by ocean currents or collisions. The synergistic effect of the double hull, the pressure-resistant, and shock-absorbing mechanisms 4 ensures stability under static high pressure and enhances structural reliability under dynamic impact. The sealing mechanism 5 achieves environmental isolation and redundant protection through a spatially layered structure. The sealing mechanism 5 within the gap between the outer hull 1 and inner hull 2 ​​forms a primary barrier, blocking the path for seawater infiltration. A secondary seal between the inner hull 2 ​​and the amplification mechanism 6 further strengthens the protection level of the core area. The annular sealing layout ensures seamless circumferential protection, while the buffer space within the gap mitigates the transient impact of pressure fluctuations on the sealing interface. This structure not only prevents external media intrusion, leading to circuit shorts or corrosion, but also stabilizes the internal microenvironment, reducing the impact of temperature and humidity fluctuations on electronic components. The synergistic effect of the multi-stage sealing extends the device's stable operation cycle in humid and high-salt environments, reducing maintenance requirements due to seal failure. The physically isolated functional module structure completely houses the amplifier mechanism 6 within the inner housing 2, with the sealing mechanism 5 securing the electrical connections and stabilizing the interface. The independent cavity formed by the inner housing 2 isolates external electromagnetic noise and mechanical vibration, providing a low-interference environment for signal processing. The combined use of the pressure-resistant mechanism 3 and the vibration-absorbing mechanism 4 prevents stress concentration on the circuit board caused by housing deformation and suppresses signal baseline drift caused by external vibration. The symmetrical annular layout of the vibration-absorbing mechanism 4 reduces interference from multi-directional vibration on signal acquisition through balanced damping properties. The rigid connection between the amplifier mechanism 6 and the housing optimizes impedance matching in the signal transmission path, reduces contact losses, and ensures efficient acoustic-to-electrical conversion and data fidelity.

[0029] In some embodiments of the present application, the pressure-resistant mechanism 3 includes a reinforcement ring 301 and a longitudinal reinforcement rib 302, the longitudinal reinforcement rib 302 is located between the outer shell 1 and the inner shell 2, and the longitudinal reinforcement rib 302 is fixedly connected to the outer shell 1 and the inner shell 2, the reinforcement ring 301 is located at both ends of the outer shell 1 and the inner shell 2, and the reinforcement ring 301 is fixedly connected to the outer shell 1 and the inner shell 2.

[0030] Specifically, the reinforcement ring 301 is located at both ends of the gap between the outer shell 1 and the inner shell 2, and the longitudinal reinforcement ribs 302 fix the connecting beam reinforcement ring 301 to the inner shell 2 and the outer shell 1, and are longitudinally distributed between the inner shell 2 and the outer shell 1. The reinforcement ring 301 is fixedly connected to the inner shell 2 and the outer shell 1 to achieve a primary sealing effect, and then the sealing mechanism 5 is filled in the gap to achieve a secondary sealing effect.

[0031] It is understandable that the combined structure of the reinforcement ring 301 and the longitudinal reinforcement ribs 302 optimizes the load transfer path through spatial layout. The longitudinal reinforcement ribs 302 are evenly distributed along the axial direction of the shell, forming a multi-channel mechanical support network, which transmits external pressure from the surface of the outer shell 1 to the inner shell 2 step by step, avoiding plastic deformation caused by local stress concentration. The reinforcement ring 301 is set at both ends of the shell, and the radial expansion of the end face is suppressed by annular rigid constraints. In conjunction with the longitudinal reinforcement ribs 302, it forms a "ring-longitudinal" composite pressure-resistant frame, which improves the overall bending stiffness of the shell. Through multi-directional support and boundary reinforcement, this structure reduces the risk of shell instability under asymmetric loads (such as lateral impact of ocean currents) and alleviates material fatigue damage in long-term high-pressure environments. The layered sealing system achieves redundant protection through the synergy of structure and material filling. The rigid connection between the reinforcement ring 301 and the shell forms the primary sealing interface, blocking the direct intrusion of external media by the tight fit between the metals; the secondary filling sealing mechanism 5 in the gap further closes the microscopic gap, and the adaptive deformation of the elastic material compensates for manufacturing tolerances and pressure fluctuations. The gradient structure of the primary seal and the secondary seal not only takes advantage of the high reliability of the metal interface, but also utilizes flexible materials to fill potential leakage paths. The annular layout ensures the continuity of the circumferential seal, and the separating effect of the longitudinal reinforcement ribs 302 prevents the overall displacement of the sealing material after being compressed, maintaining the long-term stability of the sealing interface. This structure reduces the risk of penetration of corrosive media in high-salt and high-pressure environments, and provides a dry and stable working environment for the internal circuits. The shock-absorbing synergistic effect of the composite pressure-resistant structure optimizes the dynamic response through the division of labor between rigid support and flexible buffering. The axial stiffness of the longitudinal reinforcement ribs 302 suppresses the transmission of low-frequency vibrations and reduces the interference of the shell resonance on the internal components; the end face constraint of the reinforcement ring 301 limits the deformation amplitude of the shell end under impact load, preventing the sealing interface from failing due to excessive displacement. The shock-absorbing mechanism 4 filled in the gap forms a distributed damping unit in the rigid frame, which absorbs high-frequency impact energy through local deformation and weakens the destructive power of instantaneous overload on precision circuits. The physically separated structure of compression resistance and shock absorption functions takes into account both static load-bearing and dynamic energy dissipation requirements, improving the environmental adaptability of the equipment under complex working conditions.

[0032] In some embodiments of the present application, the shock-absorbing mechanism 4 includes a reinforcement column 401 and a shock-absorbing part. The reinforcement column 401 is fixedly connected to the inner shell 2. Several reinforcement columns 401 are provided. Several of the reinforcement columns 401 are located between the longitudinal reinforcement ribs 302. Shock-absorbing parts are provided in several of the reinforcement columns 401.

[0033] In some embodiments of the present application, the shock-absorbing part includes a connecting column 402, a sliding plate 403, a torsion spring 404, a slide groove 405 and a limit plate 406. The slide groove 405 is arranged in the reinforcing column 401. The interior of the slide groove 405 is vertically slidably connected with the sliding plate 403. A torsion spring 404 is arranged between the lower surface of the sliding plate 403 and the bottom wall of the slide groove 405, and a connecting column 402 is arranged on the upper surface of the sliding plate 403. The upper ends of the connecting columns 402 pass through the reinforcing columns 401 and are fixedly connected to the outer shell 1.

[0034] Specifically, a number of reinforcing columns 401 are arranged in the gap between the outer shell 1 and the inner shell 2. The bottom wall of the reinforcing column 401 is fixedly connected to the outer wall of the inner shell 2. A shock-absorbing part is provided in the reinforcing column 401, and the shock-absorbing effect is achieved by a torsion spring 404. The connecting column 402 is fixedly connected to the inner wall of the outer shell 1, thereby realizing a fixed shock-absorbing mechanism 4.

[0035] As can be understood, the composite damping mechanism of sliding plate 403 and torsion spring 404 achieves multi-stage absorption of impact energy through innovative mechanical pathways. External impact loads are transmitted through the outer shell 1 to the connecting column 402, driving the sliding plate 403 along the chute 405 and compressing the torsion spring 404, converting kinetic energy into elastic potential energy and frictional heat. The vertical guide structure of the chute 405 ensures axial transmission of the impact force, preventing structural instability caused by lateral components. The limit plate 406 constrains the displacement of the sliding plate 403, preventing spring overload failure. The rigid support of the reinforcing column 401 and the elastic deformation of the damping portion form a "rigid and flexible" buffering system, which not only suppresses the transmission of high-frequency vibrations but also reduces the destructive effects of low-frequency shocks. This structure reduces the risk of transient overload on the internal circuitry caused by external shocks through multimodal conversion of mechanical energy. The coordinated response of the distributed damping mechanism 4 improves adaptability to dynamic environments through spatial layout. The reinforcing columns 401 are evenly spaced along the longitudinal reinforcement ribs 302, forming a grid-like damping network that can synchronously respond to impact loads from different directions. The combination of sliding plate 403 and torsion spring 404 allows for axial compression and slight torsional deformation, adapting to the force component of non-vertical impact forces. The rigid attachment of connecting column 402 to outer shell 1 ensures a controllable load transfer path and avoids localized stress concentration. The nested structure of the shock-absorbing mechanism 4 and the compression-resistant frame balances static load-bearing and dynamic energy dissipation requirements, maintaining the overall rigidity of the shell while endowing the structure with adaptability to complex impact scenarios.

[0036] In some embodiments of the present application, the inner shell 2 includes a groove 201, an inner partition 202 and an inner liner 203. Inner partitions 202 are provided on both sides of the inner shell 2. The inner partitions 202 are fixedly connected to the inner wall of the inner shell 2. The groove 201 is located at both ends of the inner shell 2, and the inner liner 203 is provided between the two inner partitions 202.

[0037] It is understandable that the composite support structure of the inner baffles 202 and the grooves 201 enhances the overall stability of the inner shell 2 through spatial mechanical layout. The connection between the inner baffles 202 on both sides and the inner wall of the shell forms a longitudinal continuous support surface, which suppresses the tendency of radial deformation of the shell; the end grooves 201 disperse local stress concentration through the geometric reinforcement effect, avoiding warping or crack propagation of the end face due to uneven pressure. The inner liner 203 is confined between the two baffles as an independent functional unit. Its closed structure forms a secondary pressure barrier. By separating the inner and outer load transfer paths, it reduces the risk of the core components directly bearing external pressure. Through the synergistic effect of the multi-level pressure-resistant architecture, the shell's anti-bending ability under asymmetric loads is improved. The spatial separation effect of the inner baffles 202 divides the interior of the shell into independent chambers, realizing physical isolation of the functional modules. The inner liner 203 serves as a dedicated accommodation area for the core amplification mechanism 6. Its closed environment shields external electromagnetic interference and mechanical vibration; the buffer zone formed by the baffles on both sides can be used to arrange auxiliary circuits or sensors to reduce signal crosstalk. The end positioning characteristics of groove 201 provide a directional installation reference for the cable interface or sealing mechanism 5, ensuring the shortest electrical connection path and optimized impedance matching. The refined structure of functional partitions reduces the probability of multi-source noise coupling and ensures the purity of the signal acquisition and amplification process.

[0038] In some embodiments of the present application, the amplifying mechanism 6 includes an insulating part and an amplifying part, the insulating part is located at both ends of the inner shell 2, and the insulating part is fixedly connected to the inner wall of the inner shell 2, the amplifying part passes through both ends of the inner shell 2, and the amplifying part is fixedly connected to the insulating part.

[0039] In some embodiments of the present application, the insulating part includes an insulating seat 6011, a first through hole 6012 and a second through hole 6013. The insulating seat 6011 is located in the groove 201, and the insulating seat 6011 is fixedly connected to the inner wall of the groove 201 and the inner partition 202 respectively. The insulating seat 6011 is penetrated by a first through hole 6012, and the inner partition 202 is penetrated by a second through hole 6013.

[0040] As can be understood, the insulating base 6011 is fixed within the grooves 201 at both ends of the inner housing 2, forming a closed insulation barrier with the inner partition 202, preventing the risk of leakage from the outer housing due to deformation or corrosion. The through-hole structure of the first through-hole 6012 and the second through-hole 6013 ensures that the signal transmission path has no direct contact with the metal structure of the housing, suppressing parasitic capacitance coupling. The non-conductive connection between the amplifier and the housing via the insulating base 6011 reduces electromagnetic noise crosstalk on sensitive circuits and ensures the purity of weak signal amplification. The integrated through-hole structure of the amplifier reduces energy loss by shortening the signal transmission distance. The fixed connection between the two ends of the amplifier and the insulating base 6011 forms a rigid electrical channel, avoiding the contact impedance fluctuations of traditional cable connections. The directional guidance characteristics of the through-holes ensure the shortest signal path and, combined with the partitioned isolation of the inner partition 202, suppress cross-interference of multi-channel signals. The positioning function of the insulating base 6011 provides a precise installation reference for the amplifier, ensuring the coaxial alignment of the signal input / output ports and optimizing the impedance matching characteristics of high-frequency signal transmission. The geometrically adapted structure of the insulating seat 6011 and the groove 201 enhances the overall rigidity of the inner shell 2 through mechanical synergy. The insulating seat 6011 is embedded in the groove 201 and secured to the inner wall and partitions at multiple points, forming localized reinforcement nodes that inhibit radial expansion of the shell end faces under high pressure. The amplifying portion, extending through both ends of the inner shell 2, balances the compressive effects of external hydrostatic pressure on the shell through axial tension. The inner partition 202 surrounding the through-hole reinforces the structure, dispersing stress concentration and preventing weakening of the shell due to the opening. This structure enhances the shell's resistance to bending and deformation while achieving electrical functionality.

[0041] In some embodiments of the present application, the amplifying part includes a pin 6021, a wire 6022 and a processing device 6023, the pin 6021 is located in the first through hole 6012, and the pin 6021 is fixedly connected to the insulating seat 6011, a section of the wire 6022 passes through the first through hole 6012 and is fixedly connected to the pin 6021, and the other end of the wire 6022 passes through the second through hole 6013 and is fixedly connected to the processing device 6023, and the processing device 6023 is located in the inner tank 203.

[0042] It is understandable that the rigid connection design between the pin 6021 and the wire 6022 optimizes the signal transmission path through physical fixation. The pin 6021 is embedded in the first through hole 6012 of the insulating seat 6011 to form a stable electrical interface, avoiding the contact impedance fluctuation of traditional connectors; one end of the wire 6022 is fixed to the pin 6021, and the other end passes through the second through hole 6013 of the inner partition 202 directly to the processing device 6023, thereby minimizing the axial length of the signal path. This design reduces the risk of signal attenuation and phase distortion by reducing intermediate transfer links, while avoiding the problem of loose connections caused by vibration. The separation effect of the inner partition 202 further isolates the signal transmission area from other functional units, suppressing multi-source interference coupling. The double isolation mechanism of the insulating seat 6011 blocks the risk of leakage through the coordinated use of space and materials. Pin 6021 is completely encapsulated within first through-hole 6012 of insulating base 6011, using non-conductive materials (such as ceramic or modified engineering plastics) to isolate potential interference from the metal structure of the housing. Wire 6022 passes through the through-hole without contact with the hole wall, eliminating the effects of parasitic capacitance on high-frequency signals. Processing device 6023 is enclosed within inner liner 203. Physically shielded by inner partition 202 and secondary isolated from insulating base 6011, it forms a "clean island" of core circuitry, improving the signal-to-noise ratio of weak signals.

[0043] In some embodiments of the present application, the sealing mechanism 5 includes epoxy resin, and the epoxy resin is filled between the outer shell 1 and the inner shell 2 , and the epoxy resin is also filled in the inner liner 203 .

[0044] In some embodiments of the present application, the sealing mechanism 5 further includes a sealant, and the sealant is filled in the groove 201 .

[0045] As can be understood, the layered, complementary structure of epoxy resin and sealant achieves redundant protection through differential material properties. Epoxy resin fills the gaps between the housing and within the liner 203, leveraging its high rigidity and curing properties to form a base sealant, blocking direct seawater infiltration. Sealant is injected into complex geometric areas, such as groove 201, where it elastically deforms to fill microscopic gaps and assembly tolerances, suppressing interfacial micro-leakage caused by pressure fluctuations. The spatial distribution and complementary functions of the two materials leverage the structural stability of epoxy resin while leveraging the sealant's flexibility to adapt to dynamic deformation, creating a "rigidity-elasticity" gradient sealing system and improving environmental isolation reliability. The chemically inert nature of epoxy resin completely encapsulates the metal housing and circuit components, blocking direct contact between seawater and the high-salt spray environment and inhibiting electrochemical corrosion and biofouling. The continuous coverage of the sealant within groove 201 further seals metal machining gaps and weld defects, eliminating localized corrosion initiation points. The synergistic effect of the two creates a seamless chemical barrier, slowing material aging and ensuring the functional stability of the equipment during long-term deep-sea operations.

[0046] The annular dual-shell architecture in the signal amplifier of a pressure-resistant hydrophone in each of the aforementioned embodiments establishes a multi-level pressure-bearing system through the spatially layered structure of the outer shell 1 and the inner shell 2. The pressure-resistant mechanism 3 is evenly distributed in an annular array between the inner and outer shells 1, forming a continuous mechanical support network. This transforms the external hydrostatic pressure from a point load to a surface load, achieving pressure dispersion and transmission. The outer shell 1 serves as the primary load-bearing layer to resist environmental pressure, while the inner shell 2 is indirectly protected by the rigid connection of the pressure-resistant mechanism 3. This dual protective structure reduces the risk of overall shell deformation. The annular shock-absorbing mechanism 4 introduces an elastic buffering function based on the pressure-resistant structure. It absorbs transient impact energy through periodic deformation and prevents external vibration from being directly transmitted to the internal core components through the rigid connection. The synergistic effect of the dual shell and the pressure-resistant and shock-absorbing mechanism 4 enables the device to withstand sustained high pressure while having redundancy to cope with sudden shocks, thereby enhancing the stability of the structure under dynamic loads. The sealing mechanism 5 between the outer shell 1 and the inner shell 2 forms a primary barrier, blocking the seawater infiltration path. The secondary seal between the inner shell 2 and the amplifier mechanism 6 further strengthens the protection level of critical areas. The annular sealing layout ensures the continuity of circumferential protection, and the buffer gap formed by the hollow structure alleviates the instantaneous impact of pressure fluctuations on the sealing interface, which not only prevents the intrusion of external media to cause circuit short circuit or corrosion, but also reduces the interference of internal sensitive components caused by temperature and humidity changes. The amplification mechanism 6 is completely placed inside the inner shell 2, and the physical fixation and interface stability of the electrical connection are achieved through the sealing mechanism 5. The independent cavity formed by the inner shell 2 isolates external electromagnetic interference and mechanical vibration, providing a low-noise working environment for signal processing. The pressure-resistant mechanism 3 and the shock-absorbing mechanism 4 not only avoid the stress concentration of the circuit board caused by shell deformation, but also suppress the signal baseline drift caused by external vibration.

[0047] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A signal amplifier for a pressure-resistant hydrophone, characterized in that: include: The shell comprises an outer shell (1) and an inner shell (2), wherein the outer shell (1) is an annular hollow structure, the outer shell (1) and the inner shell (2) are fixedly connected via a pressure-resistant mechanism (3), and the pressure-resistant mechanism (3) is annularly arranged between the outer shell (1) and the inner shell (2), a shock-absorbing mechanism (4) is also arranged between the outer shell (1) and the inner shell (2), and the shock-absorbing mechanism (4) is annularly arranged between the outer shell (1) and the inner shell (2), a sealing mechanism (5) is located inside the inner shell (2) and the outer shell (1), an amplifying mechanism (6) is located inside the inner shell (2), and the amplifying mechanism (6) and the inner shell (2) are cooperatively connected via the sealing mechanism (5).

2. The signal amplifier of the pressure-resistant hydrophone according to claim 1, characterized in that: The pressure-resistant mechanism (3) comprises a reinforcement ring (301) and a longitudinal reinforcement rib (302), wherein the longitudinal reinforcement rib (302) is located between the outer shell (1) and the inner shell (2), and the longitudinal reinforcement rib (302) is fixedly connected to the outer shell (1) and the inner shell (2), and the reinforcement ring (301) is located at both ends of the outer shell (1) and the inner shell (2), and the reinforcement ring (301) is fixedly connected to the outer shell (1) and the inner shell (2).

3. The signal amplifier of the pressure-resistant hydrophone according to claim 2, characterized in that: The shock absorbing mechanism (4) comprises a reinforcing column (401) and a shock absorbing portion, wherein the reinforcing column (401) is fixedly connected to the inner shell (2), and a plurality of reinforcing columns (401) are provided, wherein the plurality of reinforcing columns (401) are located between the longitudinal reinforcing ribs (302), and a shock absorbing portion is provided in each of the plurality of reinforcing columns (401), and the shock absorbing portion is elastically connected to the outer shell (1).

4. The signal amplifier for a pressure-resistant hydrophone according to claim 3, characterized in that: The shock absorbing part includes a connecting column (402), a sliding plate (403), a torsion spring (404), a sliding groove (405) and a limiting plate (406), wherein the sliding groove (405) is arranged in the reinforcing column (401), and the interior of the sliding groove (405) is vertically slidably connected to the sliding plate (403), a torsion spring (404) is arranged between the lower surface of the sliding plate (403) and the bottom wall of the sliding groove (405), and a connecting column (402) is arranged on the upper surface of the sliding plate (403), and the upper ends of the connecting columns (402) respectively pass through the reinforcing columns (401) and are fixedly connected to the outer shell (1).

5. The signal amplifier for a pressure-resistant hydrophone according to claim 4, characterized in that: The inner shell (2) comprises a groove (201), an inner partition (202) and an inner liner (203); inner partitions (202) are provided on both sides of the inner shell (2); the inner partitions (202) are fixedly connected to the inner wall of the inner shell (2); the grooves (201) are located at both ends of the inner shell (2); and the inner liner (203) is provided between the two inner partitions (202).

6. The signal amplifier for a pressure-resistant hydrophone according to claim 5, characterized in that: The amplifying mechanism (6) comprises an insulating portion and an amplifying portion, wherein the insulating portion is located at both ends of the inner shell (2) and is fixedly connected to the inner wall of the inner shell (2), and the amplifying portion passes through both ends of the inner shell (2) and is fixedly connected to the insulating portion.

7. The signal amplifier for a pressure-resistant hydrophone according to claim 6, characterized in that: The insulating portion comprises an insulating seat (6011), a first through hole (6012) and a second through hole (6013); the insulating seat (6011) is located in the groove (201), and the insulating seat (6011) is fixedly connected to the inner wall of the groove (201) and the inner partition (202), respectively; the insulating seat (6011) is provided with a first through hole (6012) extending therethrough, and the inner partition (202) is provided with a second through hole (6013) extending therethrough.

8. The signal amplifier for a pressure-resistant hydrophone according to claim 7, characterized in that: The amplifying portion comprises a pin (6021), a wire (6022) and a processing device (6023); the pin (6021) is located in the first through hole (6012), and the pin (6021) is fixedly connected to the insulating seat (6011); a section of the wire (6022) passes through the first through hole (6012) and is fixedly connected to the pin (6021); and the other end of the wire (6022) passes through the second through hole (6013) and is fixedly connected to the processing device (6023); and the processing device (6023) is located in the inner tank (203).

9. The signal amplifier for a pressure-resistant hydrophone according to claim 8, characterized in that: The sealing mechanism (5) comprises epoxy resin, the epoxy resin is filled between the outer shell (1) and the inner shell (2), and the epoxy resin is also filled in the inner liner (203).

10. The signal amplifier of the pressure-resistant hydrophone according to claim 9, characterized in that: The sealing mechanism (5) further comprises a sealant, and the sealant is filled in the groove (201).

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