Low-magnetism anti-sonar detection stealth diving suit system and preparation method

Abstract

The invention relates to the technical field of diving equipment, in particular to a low-magnetism anti-sonar detection stealth diving suit system and a preparation method, and the system comprises a low-magnetism base material layer, a gradient impedance acoustic layer, a nonmetal fastening assembly, a thermal signal regulation and control layer, a fluid noise suppression surface, a multi-layer composite structure module and a dynamic regulation device. Magnetic field signals are reduced through a low-magnetic material and non-metal design, sonar reflection is reduced through a gradient impedance layer, thermal signals are regulated and controlled through a phase change material, fluid noise is restrained through bionic textures, and a multifunctional layered structure and a dynamic adjustment function are combined. The underwater concealment and action efficiency of the diver can be remarkably improved, and the problems that a traditional diving suit is prone to being detected, heavy, inflexible and the like are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of diving equipment, and in particular relates to a stealth diving suit system with low magnetism and resistance to sonar detection, and a preparation method thereof. Background Art

[0002] With the continuous development of underwater detection technology, the detection risks faced by divers during missions have increased significantly. Traditional diving suits contain metal components (such as zippers and fiber coatings), which are easily detected by magnetic anomaly detectors (MADs), increasing the possibility of exposure.

[0003] At the same time, the acoustic impedance of existing diving suit materials is significantly different from that of water, resulting in significant reflection of active sonar signals, further increasing the probability of being detected.

[0004] While currently used stealth technologies (such as rubber sound-absorbing layers) can reduce sonar reflections to a certain extent, their overall design is bulky and limited in flexibility, hindering the diver's operational efficiency. Furthermore, existing solutions still have numerous shortcomings: while non-magnetic metals (such as titanium) can reduce magnetic signals, they are expensive and complex to manufacture; sound-absorbing coatings are prone to detachment during use and lack durability; and effective control of thermal signals and fluid noise is lacking. These limitations make it difficult to achieve an ideal balance between stealth and practicality in diving suits. Therefore, the present invention provides a stealth diving suit system and method for its manufacture that is low in magnetic properties and resistant to sonar detection. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the low-magnetic and sonar-resistant stealth diving suit system described in the present invention includes a low-magnetic substrate layer, a gradient impedance acoustic layer, a non-metallic fastening component, a thermal signal regulation layer, a fluid noise suppression surface, a multi-layer composite structure module and a dynamic adjustment device. The low-magnetic substrate layer is composed of a low-magnetic polymer composite material and is embedded in a conductive network to maintain functionality; the gradient impedance acoustic layer is formed by a composite of porous silicone rubber and hollow microspheres to form a gradient impedance characteristic; the non-metallic fastening component adopts a ceramic zipper and a high-strength fiber sewing method; the thermal signal regulation layer utilizes a phase change material dispersion to absorb and delay heat release; the fluid noise suppression surface reduces turbulent vibration noise through a bionic texture design; the multi-layer composite structure module realizes waterproof, antibacterial, wave-absorbing and other functions through a layered design; the dynamic adjustment device adjusts buoyancy and comfort through air bags in response to water pressure changes.

[0007] Preferably, the low-magnetic substrate layer includes a polyurethane-aramid blended matrix, a carbon nanotube conductive mesh, and a graphene-reinforced coating; the gradient impedance acoustic layer includes a porous silicone rubber matrix, a hollow glass microsphere filler, and an absorbing film outer coating; the non-metallic fastening components include ceramic fasteners, a PBO fiber zipper, and a metal-free suture; the thermal signal regulation layer includes a paraffin-based microcapsule dispersion, a thermal conduction buffer layer, and an infrared reflective film; the fluid noise suppression surface includes a bionic shark skin texture structure, a diamond groove array, and a flexible elastic coating; the multi-layer composite structure module includes a waterproof and antibacterial outer layer, a absorbing middle layer, and a highly elastic inner layer; the dynamic adjustment device includes a water pressure sensing airbag, an expansion adjustment mechanism, and an airtight interface.

[0008] Preferably, the gradient impedance acoustic layer forms a continuous impedance transition through a combination of a porous silicone rubber matrix and a hollow glass microsphere filler, with an impedance value gradually changing from 1.5MRayl to 1.6MRayl and a thickness ranging from 2mm to 5mm. A stable structure is formed after spraying and curing layer by layer; the ceramic fasteners in the non-metallic fastening assembly are fixed to the gas cylinder interface through a threaded connection, the PBO fiber zipper is embedded in the clothing seam using a seamless weaving process, and the metal-free suture is combined with the substrate through hot melt technology; the paraffin-based microcapsule dispersion in the thermal signal regulation layer is evenly distributed on the inner layer substrate through electrostatic spraying, the heat conduction buffer layer uses a porous foam material, and the infrared reflective film is attached to the inner layer surface through a vacuum coating process.

[0009] Preferably, the fluid noise suppression surface is formed into a bionic shark skin texture through a mold embossing process, the diamond groove array has a depth of 0.5mm to 1mm and a width of 2mm to 3mm, and the flexible elastic coating is sprayed and covered with silicone material; the waterproof and antibacterial outer layer in the multi-layer composite structure module is enhanced by plasma treatment to enhance the surface hydrophobicity, the wave-absorbing middle layer is formed by a composite of porous polymer and metamaterial, and the high-elasticity inner layer is knitted by a polymer elastomer; the water pressure sensing airbag in the dynamic adjustment device monitors the water depth changes in real time through a micro pressure sensor, the expansion adjustment mechanism controls the airbag volume through a micro air pump, and the airtight interface is made of ceramic material and achieves high sealing through an O-ring.

[0010] Preferably, a method for preparing a low-magnetic, sonar-resistant stealth diving suit, based on the above system structure, comprises the following steps:

[0011] S1: Polyurethane and carbon nanotubes are blended and spun into conductive fiber fabrics with a volume resistivity below 100 Ω·cm;

[0012] S2: spraying a silicone layer containing 30% hollow glass microspheres with a thickness gradually increasing from 2 mm to 5 mm, forming a gradient impedance layer after curing;

[0013] S3: Use PBO fiber to sew the seams, ceramic fasteners to fix the cylinder interface, and the metal-free sutures are bonded to the base material through hot melt technology;

[0014] S4: Electrostatic spraying of paraffin-based microcapsule dispersion on the inner substrate, the thermal conductive buffer layer uses porous foam material, and the infrared reflective film is attached to the inner surface through a vacuum coating process;

[0015] S5: A bionic shark skin texture is formed through a mold embossing process. The diamond groove array has a depth of 0.5 mm to 1 mm and a width of 2 mm to 3 mm. The flexible elastic coating is sprayed with silicone material.

[0016] S6: The waterproof and antibacterial outer layer is plasma treated to enhance its surface hydrophobicity, the wave-absorbing middle layer is formed by a composite of porous polymer and metamaterial, and the highly elastic inner layer is knitted with a polymer elastomer;

[0017] S7: Install a water pressure sensing airbag and an expansion adjustment mechanism. The micro pressure sensor monitors the water depth changes in real time. The micro air pump controls the volume of the airbag. The airtight interface is made of ceramic material and uses an O-ring to achieve high sealing.

[0018] Preferably, the polyurethane-aramid blended matrix in the low-magnetic substrate layer is prepared by an extrusion molding process, the carbon nanotube conductive network is embedded in the substrate by electrospinning, and the graphene enhanced coating is formed by a chemical vapor deposition process; the porous silicone rubber matrix in the gradient impedance acoustic layer is prepared by a compression molding process, the hollow glass microsphere filler is evenly distributed by stirring and mixing, and the absorbing film outer coating is covered on the silicone rubber surface by a coating process; the ceramic fasteners in the non-metallic fastening components are prepared by an injection molding process, the PBO fiber zipper is embedded in the seam of the clothing by a seamless weaving process, and the metal-free suture is combined with the substrate by hot melt technology; the paraffin-based microcapsule dispersion in the thermal signal regulation layer is evenly distributed on the inner substrate by electrostatic spraying, the heat conduction buffer layer uses a porous foam material, and the infrared reflective film is attached to the inner surface by a vacuum coating process.

[0019] Preferably, the bionic shark skin texture in the fluid noise suppression surface is formed by a mold embossing process, the diamond groove array has a depth of 0.5mm to 1mm and a width of 2mm to 3mm, and the flexible elastic coating is sprayed and covered with silicone material; the waterproof and antibacterial outer layer in the multi-layer composite structure module is enhanced by plasma treatment to enhance the surface hydrophobicity, the wave-absorbing middle layer is formed by a composite of porous polymer and metamaterial, and the high-elasticity inner layer is knitted by a polymer elastomer; the water pressure sensing airbag in the dynamic adjustment device monitors the water depth changes in real time through a micro pressure sensor, the expansion adjustment mechanism controls the airbag volume through a micro air pump, and the airtight interface is made of ceramic material and achieves high sealing through an O-ring.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The low-magnetic, sonar-resistant stealth diving suit system and preparation method described in the present invention significantly reduce the diving suit's magnetic field signal through the design of a low-magnetic substrate layer and non-metallic fastening components, thereby preventing it from being detected by magnetic anomaly detection equipment. The gradient impedance acoustic layer effectively reduces sonar signal reflections through the gradient impedance characteristics formed by the composite of porous silicone rubber and hollow microspheres. The thermal signal regulation layer absorbs and delays heat release through a phase change material dispersion, thereby suppressing infrared radiation. The fluid noise suppression surface reduces turbulent vibration noise through a bionic texture design.

[0022] 2. The low-magnetic, sonar-resistant stealth diving suit system and its manufacturing method, described in this invention, utilizes a multi-layered composite structural module, achieving multiple functions such as waterproofing, antibacterial properties, and wave absorption through a layered design. A dynamic adjustment mechanism utilizes air bladders to respond to changes in water pressure, enhancing the suit's flexibility and comfort. These technical solutions address the challenges of traditional diving suits, such as their susceptibility to detection, bulkiness, and inflexibility, as well as their inability to balance thermal signatures and fluid noise, significantly improving a diver's underwater stealth and operational efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 Schematic diagram of the overall structure of the system of the present invention;

[0025] Figure 2 is a flow chart of the method of the present invention;

[0026] Figure 3 Schematic diagram of the structure of the fluid noise suppression surface.

[0027] In the figure: 1. Low-magnetic substrate layer; 2. Gradient impedance acoustic layer; 3. Thermal signal regulation layer; 4. Fluid noise suppression surface; 5. Multi-layer composite structure module; 6. Water pressure sensing airbag; 7. Expansion adjustment mechanism; 8. Ceramic fasteners; 9. Bionic shark skin texture; 10. Diamond groove array. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments;

[0029] like Figure 1 As shown, a low-magnetic and sonar-resistant stealth diving suit system according to an embodiment of the present invention includes a low-magnetic substrate layer 1, a gradient impedance acoustic layer 2, a thermal signal regulation layer 3, a fluid noise suppression surface 4, a multi-layer composite structure module 5, and a dynamic adjustment device;

[0030] The low-magnetic substrate layer 1 is composed of a polyurethane-aramid blended matrix, a carbon nanotube conductive mesh and a graphene reinforced coating; the polyurethane-aramid blended matrix is prepared by an extrusion molding process, and its fiber arrangement direction is consistent with the force direction of the diving suit to ensure strength and flexibility; the carbon nanotube conductive mesh is embedded in the substrate through an electrospinning process, and its volume resistivity is controlled below 100Ω·cm, thus forming a uniform conductive network; the graphene reinforced coating forms a reinforcement layer with a thickness of 10 to 20 microns on the surface of the substrate through a chemical vapor deposition process. This layer is tightly bonded to the substrate and improves the overall mechanical properties through a mechanical anchoring effect; the low-magnetic substrate layer 1 is located in the innermost layer of the diving suit system, directly contacting the human skin, and its outer side is tightly fitted with the gradient impedance acoustic layer 2, and the two are seamlessly connected through a hot pressing process.

[0031] The gradient impedance acoustic layer 2 is composed of a porous silicone rubber matrix, hollow glass microsphere fillers and an absorbing film outer covering; the porous silicone rubber matrix is prepared by a compression molding process, and hollow glass microsphere fillers with a diameter of 50 microns to 100 microns are evenly distributed inside it, with a filling ratio of 30% volume fraction; the introduction of hollow glass microspheres reduces the material density and forms a gradient impedance characteristic, with the impedance value gradually transitioning from 1.5MRayl to 1.6MRayl, and the thickness ranges from 2mm to 5mm; the absorbing film outer covering is covered on the silicone rubber surface by a coating process, with a thickness of 0.2mm, and its main component is a composite material of ferrite particles and polymers; the gradient impedance acoustic layer 2 is located on the outside of the low-magnetic substrate layer 1, and the two are bonded and fixed by hot melt adhesive, and the bonding interface is plasma treated to enhance the bonding strength.

[0032] The thermal signal regulation layer 3 includes a paraffin-based microcapsule dispersion, a heat conduction buffer layer and an infrared reflective film; the paraffin-based microcapsule dispersion is evenly distributed on the surface of the inner substrate by electrostatic spraying, and its particle size ranges from 1 micron to 5 microns, and the spraying density is 1000 microcapsules per square centimeter; the heat conduction buffer layer uses a porous foam material with a thickness of 1 mm and a porosity of 70%, which can effectively delay heat transfer; the infrared reflective film is attached to the surface of the heat conduction buffer layer through a vacuum coating process, with a thickness of 0.1 mm and a composite film of aluminum and aluminum oxide as the main component; the thermal signal regulation layer 3 is located on the outside of the gradient impedance acoustic layer 2, and the two are bonded and fixed by hot melt adhesive, and the porous structure of the heat conduction buffer layer and the surface texture of the gradient impedance acoustic layer 2 interlock with each other to enhance stability.

[0033] The design features of the fluid noise suppression surface 4 are as follows Figure 3As shown, it consists of a bionic shark skin texture 9 and a diamond groove array 10; the bionic shark skin texture 9 is formed by a mold embossing process, and its surface has tiny protrusions with a height of 0.1mm to 0.2mm, and the protrusion spacing is 0.5mm; the diamond groove array 10 has a depth of 0.5mm to 1mm and a width of 2mm to 3mm, which is achieved through precise mold design and embossing process; the flexible elastic coating is sprayed with silicone material with a thickness of 0.3mm and a Shore hardness of 30A, which can adapt to deformation requirements under different water pressure conditions; the fluid noise suppression surface 4 is located on the outside of the multi-layer composite structure module 5, and the two are firmly combined through a hot vulcanization process, and the edge of the flexible elastic coating extends to the surface of the multi-layer composite structure module 5 to enhance sealing.

[0034] The multi-layer composite structure module 5 includes a waterproof and antibacterial outer layer, a wave-absorbing middle layer and a highly elastic inner layer; the waterproof and antibacterial outer layer is enhanced in surface hydrophobicity by plasma treatment, and its contact angle reaches more than 120°, which can effectively prevent moisture penetration; the wave-absorbing middle layer is formed by a composite of porous polymer and metamaterial, with a thickness of 1mm, a porosity of 60%, and a metamaterial unit size of 1mm×1mm, which can absorb electromagnetic waves within a specific frequency range; the highly elastic inner layer is knitted by a polymer elastomer, with a tensile strength of 20MPa and an elongation at break of 400%, which can adapt to the deformation requirements during human movement; the multi-layer composite structure module 5 is located on the outside of the thermal signal control layer 3, and the two are bonded and fixed by hot melt adhesive, and the porous structure of the wave-absorbing middle layer and the pores of the heat conduction buffer layer are interconnected to optimize the overall performance.

[0035] The dynamic adjustment device includes a water pressure sensing airbag 6, an expansion adjustment mechanism 7 and an airtight interface; the water pressure sensing airbag 6 monitors the water depth changes in real time through a micro pressure sensor, which is made of medical-grade silicone with a thickness of 0.5mm and a volume range of 100ml to 500ml; the expansion adjustment mechanism 7 controls the airbag volume through a micro air pump, and its response time is within 1 second, and it can quickly adjust the airbag state according to the water pressure change; the airtight interface is made of ceramic material and achieves high sealing through an O-ring. The interface diameter is 10mm and the maximum pressure it can withstand is 10MPa; the dynamic adjustment device is installed in the back area of the multi-layer composite structure module 5, and the water pressure sensing airbag 6 is connected to the expansion adjustment mechanism 7 through a flexible pipe. The airtight interface is located at the bottom of the expansion adjustment mechanism 7 and is connected to the external air source.

[0036] The non-metallic fastening components include a ceramic fastener 8, a PBO fiber zipper and a metal-free suture. The ceramic fastener 8 is prepared by an injection molding process, and its threaded connection is fixed at the gas cylinder interface, with a thread diameter of 8 mm and a pitch of 1 mm. The PBO fiber zipper is embedded in the seam of the clothing through a seamless weaving process, with a zipper tooth width of 3 mm and a zipper bandwidth of 10 mm. The metal-free suture is bonded to the base material through hot-melt technology, with a melting point of 200°C and a wire diameter of 0.5 mm. The non-metallic fastening components are distributed at the key connection parts of the diving suit, with the ceramic fastener 8 located at the gas cylinder interface, the PBO fiber zipper arranged along the front of the clothing, and the metal-free suture running through all seam areas.

[0037] like Figure 2 As shown, the preparation method of the present invention is based on the above system structure, and the specific steps are as follows:

[0038] S1: Polyurethane and carbon nanotubes are blended and spun into conductive fiber fabrics with a volume resistivity below 100 Ω·cm;

[0039] S2: spraying a silicone layer containing 30% hollow glass microspheres with a thickness gradually increasing from 2 mm to 5 mm, forming a gradient impedance layer after curing;

[0040] S3: Use PBO fiber to sew the seams, ceramic fasteners to fix the cylinder interface, and the metal-free sutures are bonded to the base material through hot melt technology;

[0041] S4: Electrostatic spraying of paraffin-based microcapsule dispersion on the inner substrate, the thermal conductive buffer layer uses porous foam material, and the infrared reflective film is attached to the inner surface through a vacuum coating process;

[0042] S5: A bionic shark skin texture is formed through a mold embossing process. The diamond groove array has a depth of 0.5 mm to 1 mm and a width of 2 mm to 3 mm. The flexible elastic coating is sprayed with silicone material.

[0043] S6: The waterproof and antibacterial outer layer is plasma treated to enhance its surface hydrophobicity, the wave-absorbing middle layer is formed by a composite of porous polymer and metamaterial, and the highly elastic inner layer is knitted with a polymer elastomer;

[0044] S7: Install a water pressure sensing airbag and an expansion adjustment mechanism. The micro pressure sensor monitors the water depth changes in real time. The micro air pump controls the volume of the airbag. The airtight interface is made of ceramic material and uses an O-ring to achieve high sealing.

[0045] The present invention realizes the complete preparation process of the stealth diving suit system with low magnetic resistance to sonar detection through the above-mentioned specific embodiments. The functional layers work together through reasonable connection methods and positional relationships to jointly improve the diver's concealment and operational efficiency underwater.

[0046] In order to better enable relevant personnel in this technical field to fully understand and implement the present invention, the specific implementation principle of the present invention is supplemented below with reference to a specific application scenario;

[0047] When performing underwater exploration missions, divers must first wear the low-magnetic, sonar-resistant stealth diving suit system described in this invention. This diving suit, through its multi-layered functional module design and the synergistic effect of its dynamic adjustment device, significantly improves a diver's concealment and operational efficiency in complex underwater environments. The following describes its operating principles and steps with reference to accompanying figures and specific scenarios.

[0048] Step 1: After the diver puts on the diving suit, the low-magnetic substrate layer 1 directly contacts the human skin. The embedded carbon nanotube conductive network and the graphene reinforced coating together form a uniform conductive network, which effectively reduces the strength of the magnetic field signal. When the diver enters the underwater environment, the polyurethane-aramid blended matrix in the low-magnetic substrate layer 1 has the fiber arrangement direction consistent with the force direction, which ensures the flexibility and strength of the material and avoids performance degradation due to stretching or extrusion. At the same time, the gradient impedance acoustic layer 2 forms a gradient impedance characteristic through the combination of its internal hollow glass microsphere filler and porous silicone rubber matrix, and the impedance value gradually transitions from 1.5MRayl to 1.6MRayl. This structural design enables the active sonar signal to be absorbed and scattered layer by layer when it contacts the surface of the diving suit, thereby reducing the intensity of the reflected signal. The absorbing film outer coating further enhances the absorption capacity of sound waves of specific frequencies, reducing the possibility of sonar detection.

[0049] Step 2: When the diver moves underwater, the fluid noise suppression surface 4 effectively reduces the generation of turbulent vibration noise through the design features of the bionic shark skin texture 9 and the diamond groove array 10. The height of the tiny protrusions of the bionic shark skin texture 9 is 0.1mm to 0.2mm, and the protrusion spacing is 0.5mm, which can form a stable boundary layer when the water flows through, suppressing the generation of turbulence; the diamond groove array 10 has a depth of 0.5mm to 1mm and a width of 2mm to 3mm. It is achieved through a precise mold stamping process, which can guide the water flow along a specific path and further reduce the noise level; the flexible elastic coating is sprayed with a silicone material with a Shore hardness of 30A and a thickness of 0.3mm, which can adapt to the deformation requirements under different water pressure conditions and ensure the stability and durability of the surface structure;

[0050] Step 3: As the diver's diving depth increases, the water pressure sensing airbag 6 in the dynamic adjustment device monitors the water depth changes in real time through a micro pressure sensor and transmits the data to the expansion adjustment mechanism 7. The micro air pump in the expansion adjustment mechanism 7 quickly adjusts the airbag volume according to the water pressure change, and the response time is controlled within 1 second. The change in the airbag volume can not only adjust the buoyancy of the diving suit, but also optimize the diver's comfort by changing the airbag shape. The airtight interface is made of ceramic material and uses O-rings to achieve high sealing, ensuring that the airbag system maintains stable operation in high-pressure environments. In addition, the ceramic fasteners 8, PBO fiber zippers and metal-free sutures in the non-metallic fastening components are distributed at the key connection points of the diving suit, avoiding the use of metal components and further reducing the risk of magnetic anomaly detection.

[0051] Step 4: During prolonged underwater operations, the thermal signal regulation layer 3 absorbs and delays heat release through a paraffin-based microcapsule dispersion, effectively inhibiting the transfer of heat from the diver's body surface to the outside world. The paraffin-based microcapsule dispersion has a particle size range of 1 micron to 5 microns and a spray density of 1,000 microcapsules per square centimeter. It can undergo a phase change when body temperature rises and absorb excess heat. The thermal conductive buffer layer uses a porous foam material with a thickness of 1 mm and a porosity of 70%, which can slow the speed of heat transfer and prevent heat from rapidly diffusing to the external environment. The infrared reflective film is attached to the surface of the thermal conductive buffer layer through a vacuum coating process. It is 0.1 mm thick and is a composite film mainly composed of aluminum and aluminum oxide. It can reflect most infrared radiation, further reducing the risk of thermal signal exposure.

[0052] Step 5. The multi-layer composite structure module 5 realizes the integration of multiple functions through the layered design of waterproof and antibacterial outer layer, wave-absorbing middle layer and highly elastic inner layer; the waterproof and antibacterial outer layer enhances the surface hydrophobicity through plasma treatment, and the contact angle reaches more than 120°, which can effectively prevent water penetration and inhibit bacterial growth; the wave-absorbing middle layer is formed by a composite of porous polymer and metamaterial, with a thickness of 1mm, a porosity of 60%, and a metamaterial unit size of 1mm×1mm, which can absorb electromagnetic waves within a specific frequency range and reduce the risk of electromagnetic signal leakage; the highly elastic inner layer is knitted by polymer elastomer, with a tensile strength of 20MPa and an elongation at break of 400%, which can adapt to the deformation requirements of the human body during movement and ensure the flexibility and comfort of the diving suit.

[0053] Through the above steps, the low-magnetic, sonar-resistant stealth diving suit system of the present invention can significantly improve a diver's concealment and operational efficiency in practical applications. The synergistic effect of the various functional layers, through rational connection methods and positional relationships, addresses the issues of traditional diving suits, such as their susceptibility to detection, bulkiness, and inflexibility, as well as their inability to balance thermal signals and fluid noise. This ensures both concealment and operational efficiency during underwater exploration missions.

[0054] Any content not described in detail in this specification belongs to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they belong to the prior art and will not be described here.

[0055] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-magnetic, sonar-resistant stealth diving suit system, characterized by: The invention comprises a low-magnetic substrate layer (1), a gradient impedance acoustic layer (2), a thermal signal regulation layer (3), a fluid noise suppression surface (4), a multi-layer composite structure module (5), a dynamic adjustment device, and a non-metallic fastening component; the low-magnetic substrate layer (1) is composed of a polyurethane-aramid blended matrix, a carbon nanotube conductive mesh, and a graphene enhanced coating; the gradient impedance acoustic layer (2) is composed of a porous silicone rubber matrix, a hollow glass microsphere filler, and an absorbing film outer coating; the thermal signal regulation layer (3) is composed of a paraffin-based microcapsule dispersion, a heat conduction buffer layer, and an infrared reflective film; the fluid noise suppression surface (4) is composed of a bionic shark skin texture (9), a diamond groove array (10), and a flexible elastic coating; the multi-layer composite structure module (5) is composed of a waterproof and antibacterial outer layer, a absorbing middle layer, and a high-elasticity inner layer; the dynamic adjustment device comprises a water pressure sensing airbag (6), an expansion regulation mechanism (7), and an airtight interface; and the non-metallic fastening component comprises a ceramic fastener (8), a PBO fiber zipper, and a metal-free suture.

2. The low-magnetism, sonar-resistant stealth diving suit system according to claim 1, characterized in that: The polyurethane-aramid blended matrix in the low-magnetic substrate layer (1) is prepared by an extrusion molding process, the carbon nanotube conductive network is embedded in the substrate by electrostatic spinning, and the graphene enhanced coating is formed by a chemical vapor deposition process. The thickness of the graphene enhanced coating is 10 microns to 20 microns.

3. The low-magnetism, sonar-resistant stealth diving suit system according to claim 2, characterized in that: The porous silicone rubber matrix in the gradient impedance acoustic layer (2) is prepared by a compression molding process, the diameter of the hollow glass microsphere filler is 50 microns to 100 microns, the filling ratio is 30% by volume, and the thickness of the absorbing film outer coating is 0.2 mm.

4. The low-magnetism, sonar-resistant stealth diving suit system according to claim 3, characterized in that: The particle size of the paraffin-based microcapsule dispersion in the thermal signal regulation layer (3) ranges from 1 micron to 5 microns, the spraying density is 1000 microcapsules per square centimeter, the thickness of the heat conduction buffer layer is 1 mm, the porosity is 70%, and the thickness of the infrared reflective film is 0.1 mm.

5. The low-magnetism, sonar-resistant stealth diving suit system according to claim 4, characterized in that: The bionic shark skin texture (9) in the fluid noise suppression surface (4) has a protrusion height of 0.1 mm to 0.2 mm, a protrusion spacing of 0.5 mm, a diamond groove array (10) with a depth of 0.5 mm to 1 mm and a width of 2 mm to 3 mm, and a thickness of the flexible elastic coating of 0.3 mm.

6. The low-magnetism, sonar-resistant stealth diving suit system according to claim 5, characterized in that: The contact angle of the waterproof and antibacterial outer layer in the multi-layer composite structure module (5) reaches above 120°, the thickness of the wave-absorbing middle layer is 1 mm, the porosity is 60%, the size of the metamaterial unit is 1 mm×1 mm, the tensile strength of the high-elasticity inner layer is 20 MPa, and the elongation at break is 400%.

7. The low-magnetism, sonar-resistant stealth diving suit system according to claim 6, characterized in that: The water pressure sensing airbag (6) in the dynamic adjustment device is made of medical grade silicone with a thickness of 0.5 mm and a volume range of 100 ml to 500 ml. The response time of the expansion adjustment mechanism (7) is within 1 second. The diameter of the airtight interface is 10 mm and the maximum pressure resistance is 10 MPa.

8. The low-magnetism, sonar-resistant stealth diving suit system according to claim 7, characterized in that: The ceramic fastener (8) in the non-metallic fastening assembly has a thread diameter of 8 mm and a pitch of 1 mm, the zipper tooth width of the PBO fiber zipper is 3 mm, the zipper belt width is 10 mm, the melting point of the non-metallic suture thread is 200° C., and the wire diameter is 0.5 mm.

9. The method for preparing a low-magnetic, sonar-resistant stealth diving suit according to claim 8, characterized in that: The method is applicable to a low-magnetic, sonar-resistant stealth diving suit system as described in any one of claims 1 to 8; the method comprises the following steps: S1: Polyurethane and carbon nanotubes are blended and spun into conductive fiber fabrics with a volume resistivity below 100 Ω·cm; S2: spraying a silicone layer containing 30% hollow glass microspheres with a thickness gradually increasing from 2 mm to 5 mm, forming a gradient impedance layer after curing; S3: Use PBO fiber to sew the seams, ceramic fasteners to fix the cylinder interface, and the metal-free sutures are bonded to the base material through hot melt technology; S4: Electrostatic spraying of paraffin-based microcapsule dispersion on the inner substrate, the thermal conductive buffer layer uses porous foam material, and the infrared reflective film is attached to the inner surface through a vacuum coating process; S5: A bionic shark skin texture is formed through a mold embossing process. The diamond groove array has a depth of 0.5 mm to 1 mm and a width of 2 mm to 3 mm. The flexible elastic coating is sprayed with silicone material. S6: The waterproof and antibacterial outer layer is plasma treated to enhance its surface hydrophobicity, the wave-absorbing middle layer is formed by a composite of porous polymer and metamaterial, and the highly elastic inner layer is knitted with a polymer elastomer; S7: Install a water pressure sensing airbag and an expansion adjustment mechanism. The micro pressure sensor monitors the water depth changes in real time. The micro air pump controls the volume of the airbag. The airtight interface is made of ceramic material and uses an O-ring to achieve high sealing.

10. The method for preparing a low-magnetic, sonar-resistant stealth diving suit according to claim 8, characterized in that: The impedance value of the gradient impedance acoustic layer (2) gradually changes from 1.5 MRayl to 1.6 MRayl, and the thickness ranges from 2 mm to 5 mm. A stable structure is formed after spraying and curing layer by layer.

Images