Deepwater nonporous spherical sound pressure hydrophone and manufacturing method thereof

Abstract

The invention provides a deepwater nonporous spherical sound pressure hydrophone and a manufacturing method thereof. The deepwater nonporous spherical sound pressure hydrophone comprises a nonporous ceramic ball, a foam decoupling piece, a cable adapter and a cable, the non-porous ceramic ball is fixed on the foam decoupling piece through a high-temperature-resistant epoxy adhesive, a wire of the non-porous ceramic ball is led into a wiring hole in the foam decoupling piece from a side hole of the foam decoupling piece, and the cable adapter is fixed at the bottom of the foam decoupling piece; the wire sequentially penetrates through the foam decoupling piece and the cable adapter to be connected with the cable, and the cable is fixed in the cable adapter through a high-temperature-resistant epoxy adhesive. The cable, the cable adapter, the foam decoupling piece and the non-porous ceramic ball are sealed through vulcanized sound transmission rubber. Compared with a high-pressure-resistant hydrophone with an oil-filled or conventional structure, the non-porous structure has the advantages that the air backing is adopted, the sensitivity can be remarkably improved, the risk of oil leakage is avoided, the size of the pressure-resistant hydrophone is reduced, the service life of a transducer is prolonged, and the stability of the hydrophone during vulcanization is ensured through a high-temperature-resistant epoxy bonding technology.

Description

Technical Field

[0001] The present invention relates to the technical field of scalar hydrophones, and in particular to a deep-water hole-free spherical acoustic pressure hydrophone and a manufacturing method thereof. Background Art

[0002] The deep sea contains extremely rich resources and has been a key area of ​​competition among countries since the 21st century. The working depth of hydroacoustic equipment has developed from meeting the needs of 500m sea depth to 6000m or even 10,000 meters, and corresponding deep-sea transducers are also needed to match deep-sea equipment. For a long time, deep-sea hydrophone products have been the focus of research and development, and pressure-resistant hydrophones are indispensable equipment in deep-sea development and strategy. The working depths of various underwater equipment such as submarines, mines, underwater drones, underwater gliders, underwater robots, buoys, etc. are getting deeper and deeper. These deep-water equipment usually need to be equipped with pressure-resistant hydrophones that can meet their working depths. Deep-water hydrophone technology is a very important technical support.

[0003] As an omnidirectional transducer, the spherical piezoelectric ceramic transducer has a uniform radiation sound field in space and is one of the most widely used transducer types in the field of underwater acoustics. The piezoelectric spherical shell transducer has many advantages such as simple structure and process, high sensitivity, good omnidirectionality, and wide working frequency band. More importantly, the characteristics of the material and structure determine that the piezoelectric ceramic shell itself has a high pressure resistance.

[0004] For deep-water hydrophones, the load they bear is mainly external water pressure, and their failure modes are mainly strength failure and stability failure. The design of the piezoelectric element, the structural design of the hydrophone, and the packaging of the hydrophone must all be within the scope of design considerations. Most piezoelectric ceramic shells work in shallow water, with a hole in one hemisphere for easy structural assembly, and air backing is often used inside the hole. This structure is very likely to cause the ceramic ball to fail in strength and stability in a deep-water working environment, which is not conducive to the measurement of acoustic performance under deep-water conditions. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide a deep-water hole-free spherical acoustic pressure hydrophone and a manufacturing method thereof.

[0006] The deep-water non-porous spherical acoustic pressure hydrophone provided by the present invention comprises a non-porous ceramic ball, a foam decoupling component, a cable adapter and a cable;

[0007] The non-porous ceramic ball is fixed on the foam decoupling piece by a high temperature resistant epoxy adhesive, and the wire of the non-porous ceramic ball is introduced into the wiring hole inside the foam decoupling piece from the side opening of the foam decoupling piece, and the cable adapter is fixed on the bottom of the foam decoupling piece;

[0008] The wire passes through the foam decoupling piece and the cable adapter in sequence to connect one end of the cable, and one end of the cable is fixed inside the cable adapter by a high-temperature resistant epoxy adhesive; one end of the cable, the cable adapter, the foam decoupling piece and the outside of the non-porous ceramic ball are sealed by vulcanized sound-transmitting rubber.

[0009] Preferably, it also includes a head adapter and a through-hole adapter;

[0010] The top of the head adapter is fixedly connected to the bottom of the foam decoupling component, the bottom of the head adapter is fixedly connected to the top of the through-hole adapter, and the bottom of the through-hole adapter is fixedly connected to the top of the cable adapter;

[0011] The conductive wire of the non-porous ceramic ball passes through the head adapter, the through-hole adapter and the cable adapter in sequence and then is connected to the cable.

[0012] Preferably, the head adapter and the foam decoupling component are fixed by a high temperature resistant epoxy adhesive.

[0013] Preferably, the bottom of the head adapter is provided with threads, and the bottom of the head adapter is rigidly connected to the through-hole adapter via the threads;

[0014] The top of the cable adapter is provided with threads, and the top of the cable adapter is rigidly connected to the through-hole connector via the threads.

[0015] Preferably, a three-way wiring hole is provided in the middle of the foam decoupling component, and the three openings of the three-way wiring hole are respectively provided on both sides and the bottom of the foam decoupling component;

[0016] The positive and negative electrodes of the non-porous ceramic ball wire are respectively introduced into the three-way wiring hole through the openings on both sides of the foam decoupling component, and are led out through the opening at the bottom of the foam decoupling component.

[0017] Preferably, the non-porous ceramic ball is formed by bonding two piezoelectric ceramic hemispheres, and silver layers are attached to both inner and outer surfaces of the non-porous ceramic ball, and both are radially polarized in opposite directions.

[0018] Preferably, a groove is provided on the top of the foam decoupling member and fits with the bottom of the non-porous ceramic ball, and the non-porous ceramic ball is fixed in the groove by a high temperature resistant epoxy adhesive.

[0019] Preferably, the cable is fixed to the cable adapter by potting with a high temperature resistant epoxy adhesive after being stripped.

[0020] Preferably, the internal wiring holes of the foam decoupling component are blocked and cured by epoxy adhesive.

[0021] The method for manufacturing a deep-water hole-free spherical acoustic pressure hydrophone provided by the present invention is used to manufacture the deep-water hole-free spherical acoustic pressure hydrophone, comprising the following steps:

[0022] Step 1: Pass the wire of the bonded non-porous ceramic ball through the routing hole of the foam decoupling component, fix the spherical surface of the non-porous ceramic ball on the foam decoupling component through a high-temperature resistant epoxy adhesive, cure at room temperature for a first preset time, then set the curing temperature to the first preset temperature, and cure for a second preset time;

[0023] Step 2: After the cable conductor of the cable is passed through the cable adapter and fixed, a high temperature resistant epoxy adhesive is injected along the upper surface of the cable adapter and then cured, and the adhesive is cured at room temperature for a third preset time, and then the curing temperature is set to a second preset temperature and cured for a fourth preset time;

[0024] Step 3: Pass the wires of the non-porous ceramic ball through the head adapter and the through-hole adapter in turn, and connect them with the leads of the cable in the cable adapter according to the positive and negative poles;

[0025] Step 4: Tighten the threads between the through-hole adapter and the cable adapter, then tighten the threads between the head adapter and the through-hole adapter, and rotate the foam decoupling piece to keep the wires smooth and free of twist;

[0026] Step 5: Apply epoxy adhesive on the contact surface between the foam decoupling component and the head adapter, set the curing temperature to the third preset temperature, and cure for the fifth preset time to assemble the hydrophone into one piece;

[0027] Step 6: Attach the wires located outside the hydrophone to the surface of the hydrophone, and plug the through holes on the surface of the foam decoupling component with epoxy adhesive and cure them. Place the assembled hydrophone in a vulcanization mold for vulcanization at a fourth preset temperature. Maintain the temperature and pressure for a sixth preset time to complete the watertight packaging.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. Compared with oil-filled or conventional high-pressure hydrophones, the non-porous structure adopted in the present invention adopts air backing, which can significantly improve the sensitivity and avoid the risk of oil leakage, and can reduce the size of the pressure-resistant hydrophone. The use of a non-porous ball structure can greatly increase the service life of the transducer. In order to assemble the non-porous ball, a special high-temperature resistant epoxy bonding technology is used between the foam and the ceramic to ensure the stability of the hydrophone during vulcanization.

[0030] 2. The present invention enables the hydrophone to withstand high hydrostatic pressure through special structural design, ensuring its sensitivity while enabling the hydrophone to work normally in an environment of 6000m underwater, providing a hardware foundation for various underwater carrier platforms. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0032] Figure 1 It is a schematic diagram of the structure of a bonded piezoelectric ceramic ball in an embodiment of the present invention;

[0033] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0034] Figure 3 is the sensitivity curve of the embodiment of the present invention at 1kHz-100kHz;

[0035] Figure 4 The conductivity value curve of the embodiment of the present invention at 1kHz-100kHz;

[0036] Figure 5 1 is a capacitance curve of an embodiment of the present invention at 1kHz-100kHz.

[0037] The figure shows:

[0038] Non-porous ceramic ball 1 Cable adapter 5

[0039] Foam decoupling 2 Cable 6

[0040] Head adapter 3 Vulcanized sound-transmitting rubber 7

[0041] Through-hole adapter 4 Wire 8 DETAILED DESCRIPTION

[0042] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0043] The purpose of the present invention is to provide a deep-water hole-free spherical acoustic pressure hydrophone and a manufacturing method thereof, so as to solve the problem that the load on the surface of the spherical shell of the ceramic spherical hydrophone increases due to the increase in working depth, which easily causes stability failure near the spherical hole and on the surface of the spherical shell, and meet the engineering application requirements for the normal operation of the hydrophone under high hydrostatic pressure.

[0044] The deep-water non-porous spherical acoustic pressure hydrophone provided by the present invention comprises a non-porous ceramic ball 1, a foam decoupling part 2, a head adapter 3, a through-hole adapter 4, a cable adapter 5 and a cable 6; the non-porous ceramic ball 1 is fixed to the foam decoupling part 2 by a high-temperature resistant epoxy adhesive, and the wire 8 of the non-porous ceramic ball 1 is introduced into the internal wiring hole of the foam decoupling part 2 from the side opening of the foam decoupling part 2, the top of the head adapter 3 is fixedly connected to the bottom of the foam decoupling part 2, the bottom of the head adapter 3 is fixedly connected to the top of the through-hole adapter 4, and the bottom of the through-hole adapter 4 is fixedly connected to the top of the cable adapter 5; the wire 8 of the non-porous ceramic ball 1 passes through the head adapter 3, the through-hole adapter 4 and the cable adapter 5 in sequence and then connects to the cable 6. One end of the cable 6 is fixed inside the cable adapter 5 by a high temperature resistant epoxy adhesive; one end of the cable 6, the cable adapter 5, the head adapter 3, the through hole adapter 4, the foam decoupling component 2 and the outside of the non-porous ceramic ball 1 are sealed by a vulcanized sound-transmitting rubber 7.

[0045] Example 1

[0046] The present embodiment provides a deep-water non-porous spherical acoustic pressure hydrophone, comprising a non-porous ceramic ball 1, a foam decoupling component 2, a head adapter 3, a through-hole adapter 4, a cable adapter 5, a cable 6, a vulcanized sound-permeable rubber 7, and a conductor 8. During installation, firstly lead out the positive and negative electrode wires from the non-porous ceramic ball 1, fix the spherical surface to the foam decoupling component 2 through a high-temperature resistant epoxy adhesive, and introduce the conductors through the two holes of the foam decoupling component 2, then process the cable 6, pass the cable wire through the adapter 5, and then fix it, fill it with high-temperature resistant epoxy adhesive and solidify it, then fix the through-hole adapter 4 and the head adapter 3 to the cable adapter 5 in turn, and finally fix the head adapter 3 to the foam decoupling component 2 through a high-temperature resistant epoxy adhesive, and after assembly, watertightly package it through the vulcanized sound-permeable rubber 7;

[0047] The non-porous ceramic ball 1 is formed by bonding two piezoelectric ceramic hemispheres with a diameter not greater than 20 mm and a thickness not less than 2 mm, with a silver layer attached to the inner and outer surfaces, both of which are radially polarized and polarized in opposite directions. The foam decoupling component 2 has a wiring hole with a diameter not greater than 4 mm inside, a groove on the upper surface, and a through hole in the solid part that is connected to the bottom. The head adapter 3 has a thread at the lower end, the upper end is bonded to the foam decoupling component 2, and the lower end is rigidly connected to the through-hole adapter 4 through the thread. The cable adapter 5 has a thread at the upper end and is rigidly connected to the through-hole adapter 4.

[0048] The outer diameter of the cable 6 should be close to the inner diameter of the cable adapter 5; after the cable 6 is stripped, it is fixed to the cable adapter 5 by epoxy potting. The wire 8 passes through the through hole of the foam decoupling component 2, passes through the head adapter 3 and the through hole adapter 4, and is connected to the cable 6.

[0049] Example 2

[0050] See also Figure 1 This embodiment provides a process method for making a deep-water pore-free piezoelectric ceramic to produce a deep-water pore-free acoustic pressure hydrophone, the structure of which includes a piezoelectric ceramic shell 1 and a wire 8. In implementation, the end cut surface of the piezoelectric ceramic shell with a diameter of not more than 20 mm, a thickness of not less than 2 mm and opposite polarization directions is polished with fine sandpaper, the inside is connected with a wire, and after treatment, it is bonded into a whole ball with an epoxy adhesive, the curing temperature is set to 80°C, and the curing time is 6 hours; after the curing is completed, the wires are respectively led out from the two hemispheres as the positive and negative electrodes of the hydrophone.

[0051] like Figure 2 As shown, a deep-water non-porous spherical acoustic pressure hydrophone is provided in an embodiment of the present invention, comprising a non-porous ceramic ball 1, a foam decoupling component 2, a head adapter 3, a through-hole adapter 4, a cable adapter 5, a cable 6, a vulcanized sound-transmitting rubber 7, and a conductor 8. The foam decoupling component 2 is provided with a through hole inside, and a groove is formed on the bonding surface; the head adapter 3, the through-hole adapter 4, and the cable adapter 5 are all provided with threads for rigid connection between structural components.

[0052] During installation, first pass the wire 8 from the bonded ceramic ball through the through hole of the foam decoupling part 2, fix the spherical surface to the foam decoupling part 2 through a high temperature resistant epoxy adhesive, and cure it at room temperature for at least 12 hours, then set the curing temperature to 120°C and the curing time to 2 hours to fully bond it. Then, pass the cable conductor of the cable 6 through the adapter 5 and fix it, inject a high temperature resistant epoxy adhesive along the upper surface of the cable adapter 5 and cure it; cure it at room temperature for at least 12 hours, then set the curing temperature to 120°C and the curing time to 2 hours to fully bond it.

[0053] Then, the ceramic lead wire is passed through the head adapter 3 and the through-hole adapter 4 in sequence, and connected with the lead wire in the cable adapter 5 according to the positive and negative poles. Preferably, at least 5 cm of wire margin is left and folded into the through-hole adapter 4. Tighten the thread between the through-hole adapter 4 and the cable adapter 5, and then tighten the thread between the head adapter 3 and the through-hole adapter 4, and keep the wire smooth and free of twist by rotating the foam decoupling 2; apply epoxy adhesive on the contact surface of the foam decoupling 2 and the head adapter 3, set the curing temperature to 80°C, and the curing time to 6 hours, so that the hydrophone is assembled into one piece.

[0054] Finally, ensure that the wires leaking out of the hydrophone are close to the surface of the hydrophone without hanging in the air, and use epoxy adhesive to plug the through holes on the surface of the foam decoupling component 2 and solidify them, and then place the assembled hydrophone into the vulcanization mold for vulcanization. The vulcanization temperature is not less than 150°C, and the heat preservation and pressure maintenance are at least 30 minutes. Complete the watertight packaging; after the watertight packaging is completed, take it out, cool it to room temperature, and then cut and correct the appearance. During implementation, the components are arranged from top to bottom in the order of vulcanized sound-transparent rubber 7, non-porous ceramic ball 1, foam decoupling component 2, head adapter 3, through-hole adapter 4, cable adapter 5, and cable 6.

[0055] In this embodiment, in order to make the deep-water non-porous spherical acoustic pressure hydrophone have better pressure resistance performance, the foam decoupling component 2 uses high-density pressure-resistant foam; the head adapter 3, the through-hole adapter 4, and the cable adapter 5 are made of stainless steel; the wire 8 uses a wire with an outer diameter of not less than 0.08 mm.

[0056] like Figure 3 As shown, the sensitivity test results of the deep-water hole-free spherical sound pressure hydrophone provided in this embodiment are tests performed when no signal preamplifier is set. The test results show that the hydrophone sensitivity is -200.1dB@1kHz (excluding preamplifier gain). The hydrophone has a flat receiving sensitivity in the frequency band of 1kHz-80kHz; in the frequency band of 1kHz-80kHz, the sensitivity is not less than -204.1dB; the fluctuation within the band is 4.2dB. It should be noted that in view of the purpose of the invention, this embodiment only measures the low frequency to 1kHz, which does not mean that the invention cannot be applied to frequencies below 1kHz. According to the performance trend of the hydrophone, in the embodiments below 1kHz, the sensitivity fluctuation is very small and can also meet the test requirements, so they will not be listed one by one.

[0057] Because the existing equipment cannot calibrate its sensitivity under the high hydrostatic pressure of 60MPa, its Cp-G curve is measured to reflect its electroacoustic performance. Figure 4 , Figure 5 shown.

[0058] The present invention enables the hydrophone to withstand high hydrostatic pressure through the special structural design, ensuring its sensitivity while allowing the hydrophone to work normally in an environment of 6000m underwater, providing a hardware foundation for various underwater carrier platforms. Compared with oil-filled or conventional structure high-pressure hydrophones, the non-porous structure adopts air backing, which can significantly improve the sensitivity and avoid the risk of oil leakage, and can reduce the size of the pressure-resistant hydrophone. The use of a non-porous ball structure can greatly increase the service life of the transducer. In order to assemble the non-porous ball, a special high-temperature resistant epoxy bonding technology is used between the foam and the ceramic to ensure the stability of the hydrophone during vulcanization.

[0059] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A deep-water hole-free spherical acoustic pressure hydrophone, characterized in that: It comprises a non-porous ceramic ball (1), a foam decoupling component (2), a cable adapter (5) and a cable (6); The non-porous ceramic ball (1) is fixed to the foam decoupling member (2) by means of a high temperature resistant epoxy adhesive, and the wire (8) of the non-porous ceramic ball (1) is introduced into the internal wiring hole of the foam decoupling member (2) from the side opening of the foam decoupling member (2), and the cable adapter (5) is fixed to the bottom of the foam decoupling member (2); The conductor (8) passes through the foam decoupling component (2) and the cable adapter (5) in sequence to connect one end of the cable (6); one end of the cable (6) is fixed inside the cable adapter (5) by means of a high temperature resistant epoxy adhesive; one end of the cable (6), the cable adapter (5), the foam decoupling component (2) and the outside of the non-porous ceramic ball (1) are sealed by means of a vulcanized sound-transmitting rubber (7).

2. The deep-water hole-free spherical acoustic pressure hydrophone according to claim 1, characterized in that: It also includes a head adapter (3) and a through-hole adapter (4); The top of the head adapter (3) is fixedly connected to the bottom of the foam decoupling component (2), the bottom of the head adapter (3) is fixedly connected to the top of the through-hole adapter (4), and the bottom of the through-hole adapter (4) is fixedly connected to the top of the cable adapter (5); The conductive wire (8) of the non-porous ceramic ball (1) passes through the head adapter (3), the through-hole adapter (4) and the cable adapter (5) in sequence and is then connected to the cable (6).

3. The deep-water hole-free spherical acoustic pressure hydrophone according to claim 2, characterized in that: The head adapter (3) and the foam decoupling component (2) are fixed by a high temperature resistant epoxy adhesive.

4. The deep-water hole-free spherical acoustic pressure hydrophone according to claim 2, characterized in that: The bottom of the head adapter (3) is provided with threads, and the bottom of the head adapter (3) and the through-hole adapter (4) are rigidly connected via the threads; The top of the cable adapter (5) is provided with a thread, and the top of the cable adapter (5) is rigidly connected to the through-hole connector (4) via the thread.

5. The deep-water hole-free spherical acoustic pressure hydrophone according to claim 1, characterized in that: A three-way wiring hole is arranged in the middle of the foam decoupling member (2), and the three openings of the three-way wiring hole are arranged on both sides and the bottom of the foam decoupling member (2) respectively; The positive and negative electrodes of the lead (8) of the non-porous ceramic ball (1) are respectively introduced into the interior of the three-way wiring hole through the openings on both sides of the foam decoupling component (2), and are led out through the opening at the bottom of the foam decoupling component (2).

6. The deep-water hole-free spherical acoustic pressure hydrophone according to claim 1, characterized in that: The non-porous ceramic ball (1) is formed by bonding two piezoelectric ceramic hemispheres. Silver layers are attached to both the inner and outer surfaces of the non-porous ceramic ball (1), and both are radially polarized with opposite polarization directions.

7. The deep-water hole-free spherical acoustic pressure hydrophone according to claim 1, characterized in that: The top of the foam decoupling member (2) is provided with a groove that fits with the bottom of the non-porous ceramic ball (1), and the non-porous ceramic ball (1) is fixed in the groove by means of a high-temperature resistant epoxy adhesive.

8. The deep-water hole-free spherical acoustic pressure hydrophone according to claim 1, characterized in that: After being stripped, the cable (6) is fixed to the cable adapter (5) by encapsulation with a high-temperature resistant epoxy adhesive.

9. The deep-water hole-free spherical acoustic pressure hydrophone according to claim 1, characterized in that: The internal wiring holes of the foam decoupling component (2) are blocked and cured by epoxy adhesive.

10. A method for manufacturing a deep-water hole-free spherical acoustic pressure hydrophone, for manufacturing the deep-water hole-free spherical acoustic pressure hydrophone according to any one of claims 1 to 9, comprising the following steps: Step 1: Pass the wire (8) of the bonded non-porous ceramic ball (1) through the routing hole of the foam decoupling component (2), fix the spherical surface of the non-porous ceramic ball (1) on the foam decoupling component (2) through a high-temperature resistant epoxy adhesive, cure at room temperature for a first preset time, then set the curing temperature to the first preset temperature, and cure for a second preset time; Step 2: After the cable conductor of the cable (6) is passed through the cable adapter (5) and fixed, a high temperature resistant epoxy adhesive is injected along the upper surface of the cable adapter (5) and then cured, and cured at room temperature for a third preset time, and then the curing temperature is set to a second preset temperature and cured for a fourth preset time; Step 3: Pass the lead wire (8) of the non-porous ceramic ball (1) through the head adapter (3) and the through-hole adapter (4) in sequence, and connect the lead wires of the cable (6) in the cable adapter (5) according to the positive and negative poles; Step 4: Tighten the threads between the through-hole adapter (4) and the cable adapter (5), then tighten the threads between the head adapter (3) and the through-hole adapter (4), and rotate the foam decoupling piece (3) to keep the wire (8) smooth and free of twist; Step 5: Apply epoxy adhesive on the contact surface between the foam decoupling component (2) and the head adapter (3), set the curing temperature to the third preset temperature, and cure for the fifth preset time, so that the hydrophone is assembled into one piece; Step 6: Attach the wire (8) located outside the hydrophone to the surface of the hydrophone, and use epoxy adhesive to seal and cure the through holes on the surface of the foam decoupling component (2), place the assembled hydrophone in a vulcanization mold for vulcanization, the vulcanization temperature is a fourth preset temperature, and the temperature and pressure are maintained for a sixth preset time to complete the watertight packaging.

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