Ocean defense network incorporated with distributed optical fibers

Abstract

The utility model discloses an ocean defense net woven with distributed optical fibers, which comprises floating bodies, stainless steel anchor cables, cement positioning anchor blocks, a liftable fence door and a sensing function net body, and is characterized in that the floating bodies are uniformly distributed above the sensing function net body; the stainless steel anchor cable is connected with the floating body and the cement positioning anchor block, the cement positioning anchor block is arranged on the seabed and matched with the stainless steel anchor cable, the liftable fence door is arranged on one side or multiple sides of the sensing function net body, and the sensing function net body is composed of stainless steel wires, ultra-high molecular weight polyethylene filaments or polyformaldehyde filaments and distributed optical fibers. The sensing function net body is a rope formed by weaving eight strands of stranded ropes, the ultra-high molecular weight polyethylene filaments or the polyformaldehyde filaments are six strands of stranded ropes, the stainless steel wires are one strand of stranded ropes, and the distributed optical fibers are one strand of stranded ropes. The network not only can stably operate in a marine environment, but also can provide accurate sensing data, and provides powerful support for marine research and monitoring.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering or marine monitoring technology, specifically to a marine defense network incorporating distributed optical fibers. Background Technology

[0002] With the increasing strategic importance of the ocean globally, the demand for security and environmental monitoring in key sea areas such as ports, waterways, marine ranches, and military facilities is growing. Traditional marine protection nets, mainly woven from stainless steel wire and polyethylene fiber, are limited to physical interception and cannot provide real-time detection and early warning of underwater intrusions (such as small submersibles and frogman infiltration), illegal fishing activities, and abnormal water quality. They are no longer sufficient to meet the requirements of modern, sophisticated, and intelligent marine protection.

[0003] In recent years, distributed fiber optic sensing technology has been gradually introduced into the field of marine monitoring due to its advantages such as long-distance continuous monitoring, resistance to electromagnetic interference, corrosion resistance, and high sensitivity. Existing technologies have attempted to simply bind ordinary communication optical cables to a net to achieve basic vibration or strain monitoring functions. However, this integration method has significant drawbacks: the fiber optic sensing unit is not firmly integrated with the net, making it susceptible to displacement or breakage due to wave impact; it lacks targeted structural protection design, resulting in poor reliability under complex sea conditions; more importantly, its outer sheath material is easily adhered to by barnacles, oysters, algae, and other organisms in the high-salt, eutrophic marine environment, causing localized stress concentration, increased micro-bending loss, and consequently, sensor signal attenuation or even failure, severely affecting long-term monitoring stability. According to research in "Biofouling Protection Technology for Marine Engineering Materials" (China Shipbuilding, 2021), the thickness of biofouling on the surface of untreated marine facilities can reach over 50 mm within 3-6 months, causing irreversible damage to precision sensing structures.

[0004] Furthermore, existing fiber optic marine protective nets mostly use ordinary polyethylene or polyurethane sheaths, which, while providing basic waterproofing, lack sufficient chemical stability and are prone to swelling and cracking under long-term seawater immersion. They also cannot simultaneously meet the requirements for tensile strength and flexibility. While some technical solutions propose using stainless steel armor protection, its excessive rigidity is unsuitable for the dynamic conditions of the net swaying with the waves, and instead accelerates fatigue damage.

[0005] In summary, existing technologies have not yet solved the core challenges of ensuring long-term stable operation of distributed fiber optic sensing systems in marine environments, resisting biofouling, and efficiently integrating with flexible mesh structures. There is an urgent need for a marine defense network technology solution that is structurally reliable, has excellent anti-fouling performance, and stable sensing functions.

[0006] Currently, there is a lack of a marine defense network incorporating distributed optical fibers that can resist marine organism attachment. Utility Model Content

[0007] The purpose of this invention is to provide a marine defense network incorporating distributed optical fibers that can resist the attachment of marine organisms.

[0008] To address the problems of the prior art, the present invention adopts the following technical solution: This application provides a marine defense network incorporating distributed optical fibers. The marine defense network incorporating distributed optical fibers includes a floating body, stainless steel anchor cables, cement positioning anchor blocks, a liftable fence gate, and a sensing function network body. The floating body is evenly distributed above the sensing function network body. The stainless steel anchor cables are connected to the floating body and the cement positioning anchor blocks. The cement positioning anchor blocks are set on the seabed and are adapted to the stainless steel anchor cables. The liftable fence gate is set on one or more sides of the sensing function network body.

[0009] The sensor network body is composed of stainless steel wire, ultra-high molecular weight polyethylene filaments or polyoxymethylene filaments, and distributed optical fibers. The ultra-high molecular weight polyethylene filaments or polyoxymethylene filaments and distributed optical fibers are woven into the stainless steel wire.

[0010] The main body of the sensing network is a rope woven from eight strands, six strands of ultra-high molecular weight polyethylene (UHMWPE) or polyoxymethylene (POM) filaments, one strand of stainless steel wire, and one strand of distributed optical fiber. The UHMWPE or POM filaments are bent and passed through the first intermediate gap of the stainless steel wire to form a loop structure. The intermediate gap is formed between the strands. The UHMWPE or POM filaments and the distributed optical fiber then pass through the second intermediate gap of the stainless steel wire to form the main body of the sensing network, which is composed of UHMWPE or POM filaments, distributed optical fiber, and stainless steel wire.

[0011] The outer surface of the sensing network body is provided with a flexible high-performance fiber-reinforced cyclic olefin resin layer; the flexible high-performance fiber-reinforced cyclic olefin resin protective material has many advantages, such as excellent optical performance, high light transmittance in the visible light range, good chemical stability, resistance to water, alkali, salt and polar solvent corrosion, and low moisture absorption, which helps protect the optical fiber from damage by external chemicals.

[0012] The addition of high-performance fibers further enhances the strength and toughness of the material. When the optical fiber is subjected to external forces such as compression, stretching, or bending, it can effectively buffer and disperse stress, preventing damage to the optical fiber. Its flexibility also allows it to adapt well to various optical fiber laying environments.

[0013] Flexible high-performance fiber-reinforced cyclic olefin resin product source: Polyplastics Co., Ltd., Japan POM.

[0014] Distributed optical fibers, including:

[0015] An optical fiber core consists of at least four optical fibers and is used to transmit optical signals.

[0016] The reinforcing element is a double-sided plastic-coated steel tape PSP wrapped longitudinally and tightly wound around the outside of the optical fiber core to improve the tensile strength and flexibility of the optical cable.

[0017] The filler, located between the fiber core and the metal armor, fills the gap between the fiber core and the metal armor, providing protection and support;

[0018] The metal armor, made of stainless steel, is tightly wrapped around the outside of the filler and is located between the outer and inner sheaths, providing additional mechanical protection;

[0019] The inner sheath, made of a protective and flame-retardant material, is tightly wrapped inside the metal armor to support the internal optical cable bundle.

[0020] The outer sheath, made of flame-retardant polyethylene, tightly wraps around the inner sheath to protect the optical cable from damage by solvents and abrasion.

[0021] Furthermore, the marine defense network incorporating distributed optical fibers also includes a remote control center, which is connected to the main body of the sensor network via radio.

[0022] Furthermore, the mode field diameter of the optical fiber is 9.2±0.4μm at 1310nm and 10.4±0.5μm at 1550nm.

[0023] Furthermore, the cladding diameter of the optical fiber is 124.8±0.7μm, the cladding non-circularity does not exceed 0.7%, the core / cladding concentricity error does not exceed 0.5μm, and the filler is a loose polymer material or a gel-like substance surrounding the optical fiber.

[0024] Furthermore, the diameter of the coating layer on the optical fiber is 245±5μm, and the cutoff wavelength λcc of the optical cable does not exceed 1260nm.

[0025] Furthermore, the attenuation coefficient of the optical fiber does not exceed 0.36 dB / km at 1310 nm and does not exceed 0.25 dB / km at 1550 nm.

[0026] Beneficial effects: The mesh of this invention can accurately monitor marine water quality parameters and biological activity, and the protective layer ensures the stability and reliability of the sensor.

[0027] Compared with the prior art, the present invention has the following advantages: (1) By reducing the cost of manual sampling and monitoring and improving the efficiency and quality of data acquisition, the network helps to improve the economic benefits of marine resource utilization.

[0028] (2) This network can not only operate stably in the marine environment, but also provide accurate sensor data, providing strong support for marine research and monitoring. This network provides an innovative monitoring and defense tool for marine ecological research, fisheries production management and engineering security monitoring, and has important scientific and practical value.

[0029] (3) Enhanced early warning capabilities: By monitoring changes in the marine environment in real time, the network can provide timely early warnings of potential environmental risks, ensuring the safe operation of marine engineering facilities. Environmentally friendly: The materials and design of the sensor network itself reduce interference with the marine environment, making it an environmentally friendly monitoring tool.

[0030] (4) The sensor network system of this utility model is designed to be deployed in the marine environment for a long period of time to capture key data such as marine biodiversity, migration dynamics, habitat evolution, and various environmental parameters in real time. The system integrates advanced sensor technology and leverages the advantages of distributed optical fiber technology to achieve high-precision, wide-area real-time monitoring of multiple environmental parameters, providing scientific support for decision-making in multiple fields. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the structure of a marine defense network incorporating distributed optical fibers, provided in an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the structure of the sensing functional network body provided in the embodiments of this application;

[0034] Figure 3 This is a schematic diagram of the structure of a distributed optical fiber provided in an embodiment of this application;

[0035] The components include: 1. Remote control center; 2. Floating body; 3. Stainless steel anchor cable; 4. Cement positioning anchor block; 5. Liftable fence gate; 6. Sensor function net body; 601 stainless steel wire; 6021 ultra-high molecular weight polyethylene filament; 6022 polyoxymethylene filament; 603 distributed optical fiber; 6031 optical fiber core; 6032 reinforcing element; 6033 filler; 6034 metal armor; 6035 inner sheath; 6036 outer sheath; and 604 flexible high-performance fiber-reinforced cyclic olefin resin layer. Detailed Implementation

[0036] To make the technical problems, technical solutions, and beneficial effects of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] Example 1

[0038] This application of the present invention provides a marine defense network incorporating distributed optical fibers. The marine defense network incorporating distributed optical fibers includes a float 2, a stainless steel anchor cable 3, a cement positioning anchor block 4, a liftable gate 5, and a sensor function network body 6. The float 2 is evenly distributed above the sensor function network body 6. The stainless steel anchor cable 3 is connected to the float 2 and the cement positioning anchor block 4. The cement positioning anchor block 4 is set on the seabed and is adapted to the stainless steel anchor cable 3. The liftable gate 5 is set on one or more sides of the sensor function network body 6.

[0039] The sensing network body 6 is composed of stainless steel wire 601, ultra-high molecular weight polyethylene filament 6021 or polyoxymethylene filament 6022, and distributed optical fiber 603. The ultra-high molecular weight polyethylene filament 6021 or polyoxymethylene filament 6022 and distributed optical fiber 603 are woven into the stainless steel wire 601.

[0040] The sensing network body 6 is a rope woven from eight strands. The ultra-high molecular weight polyethylene filament 6021 or polyoxymethylene filament 6022 is a six-strand rope, the stainless steel wire 601 is a single strand, and the distributed optical fiber 603 is a single strand. The ultra-high molecular weight polyethylene filament 6021 or polyoxymethylene filament 6022 is bent and the distributed optical fiber 603 passes through the first intermediate gap of the stainless steel wire 601 to form a loop structure. The intermediate gap is formed between the strands. The ultra-high molecular weight polyethylene filament 6021 or polyoxymethylene filament 6022 and the distributed optical fiber 603 then pass through the second intermediate gap of the stainless steel wire 601 to form a sensing network body that integrates ultra-high molecular weight polyethylene filament 6021 or polyoxymethylene filament 6022, distributed optical fiber 603 and stainless steel wire 601.

[0041] The manufacturer of the ultra-high molecular weight polyethylene filament 6021 is DSM Royal DSM NV (Koninklijke DSM NV) of the Netherlands. The manufacturer of the polyoxymethylene filament fiber 6022 is Kailuan Energy Chemical Co., Ltd. The outer surface of the sensor network body 6 is provided with a flexible high-performance fiber-reinforced cyclic olefin resin layer 604; the flexible high-performance fiber-reinforced cyclic olefin resin layer 604 is a protective material for the flexible high-performance fiber-reinforced cyclic olefin resin. Cyclic olefin resin itself has many advantages, such as excellent optical properties, high light transmittance in the visible light range, and good chemical stability, which can resist the corrosion of water, alkali, salt and polar solvents, and has low moisture absorption, which helps to protect the optical fiber from damage by external chemicals.

[0042] The addition of high-performance fibers further enhances the strength and toughness of the material. When the optical fiber is subjected to external forces such as compression, stretching, or bending, it can effectively buffer and disperse stress, preventing damage to the optical fiber. Its flexibility also allows it to adapt well to various optical fiber laying environments.

[0043] Flexible high-performance fiber-reinforced cyclic olefin resin products sourced from Shanghai Chemical Industry Research Institute Co., Ltd., including distributed optical fibers:

[0044] Fiber optic core 6031 consists of at least four optical fibers and is used to transmit optical signals;

[0045] The reinforcing element 6032 is a double-sided plastic-coated steel tape PSP wrapped longitudinally and tightly wound around the outside of the optical fiber core to improve the tensile strength and flexibility of the optical cable.

[0046] Filler 6033 is located between the optical fiber core and the metal armor, filling the gap between the optical fiber core and the metal armor to provide protection and support;

[0047] Metal armor 6034, made of stainless steel, is tightly wrapped around the outside of the filler and is located between the outer and inner sheaths, providing additional mechanical protection;

[0048] The inner sheath 6035, made of a protective and flame-retardant material, is tightly wrapped inside the metal armor to support the internal optical cable bundle.

[0049] The outer sheath, 6036, is made of flame-retardant polyethylene and tightly wraps around the outside of the inner sheath to protect the optical cable from damage by solvents and abrasion.

[0050] The marine defense network, which incorporates distributed optical fibers, also includes a remote control center 1, which is connected to the sensor network body 6 via radio.

[0051] The mode field diameter of the optical fiber is 9.2±0.4μm at 1310nm and 10.4±0.5μm at 1550nm.

[0052] The cladding diameter of the optical fiber is 124.8±0.7μm, the cladding non-circularity does not exceed 0.7%, the core / cladding concentricity error does not exceed 0.5μm, and the filler is a loose polymer material or a gel-like substance surrounding the optical fiber.

[0053] The diameter of the coating layer on the optical fiber is 245±5μm, and the cutoff wavelength λcc of the optical cable does not exceed 1260nm.

[0054] The attenuation coefficient of the optical fiber is no more than 0.36 dB / km at 1310 nm and no more than 0.25 dB / km at 1550 nm.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. The scope of protection of this utility model is defined by the appended claims, specification, and their equivalents.

Claims

1. A distributed optical fiber-based maritime defense network, comprising: The marine defense network with the distributed optical fiber includes a floating body (2), a stainless steel anchor cable (3), a cement positioning anchor block (4), a liftable fence door (5), and a sensing function network body (6), the floating bodies (2) are uniformly distributed above the sensing function network body (6), the stainless steel anchor cable (3) is connected with the floating body (2) and the cement positioning anchor block (4), the cement positioning anchor block (4) is arranged on the seabed, the cement positioning anchor block (4) is matched with the stainless steel anchor cable (3), the liftable fence door (5) is arranged on one side or multiple sides of the sensing function network body (6); The sensing function network body (6) is composed of a stainless steel wire (601), an ultrahigh molecular polyethylene filament (6021) or a polyformaldehyde filament (6022), and a distributed optical fiber (603), the ultrahigh molecular polyethylene filament (6021) or the polyformaldehyde filament (6022) and the distributed optical fiber (603) are woven into the stainless steel wire (601), The sensing function network body (6) is a rope woven by eight strands, the ultrahigh molecular polyethylene filament (6021) or the polyformaldehyde filament (6022) is six strands, the stainless steel wire (601) is one strand, and the distributed optical fiber (603) is one strand, the ultrahigh molecular polyethylene filament (6021) or the polyformaldehyde filament (6022) is bent and the distributed optical fiber (603) passes through a first intermediate gap of the stainless steel wire (601), to form a ring eye structure, the intermediate gap is formed between the strands, and the ultrahigh molecular polyethylene filament (6021) or the polyformaldehyde filament (6022) and the distributed optical fiber (603) pass through a second intermediate gap of the stainless steel wire (601) again, to form the sensing function network body with the ultrahigh molecular polyethylene filament (6021) or the polyformaldehyde filament (6022), the distributed optical fiber (603), and the stainless steel wire (601) being integrated; An outer surface of the sensing function network body (6) is provided with a flexible high-performance fiber reinforced ring-shaped olefin resin layer (604); The distributed optical fiber comprises: An optical fiber core (6031) composed of at least four optical fibers for transmitting optical signals; A reinforcing element (6032) in the form of a double-sided plastic-coated steel strip PSP longitudinal wrapping tightly wrapped around the outside of the optical fiber core to improve the tensile strength and flexibility of the optical cable; A filler (6033) located between the optical fiber core and the metal armor, filling the gap between the optical fiber core and the metal armor, providing protection and support; A metal armor (6034) made of stainless steel tightly wrapped around the outside of the filler, located between the outer sheath and the inner sheath, providing additional mechanical protection; An inner sheath (6035) made of a material with protective and flame-retardant properties tightly wrapped around the inside of the metal armor for supporting the internal optical cable harness; An outer sheath (6036) made of flame-retardant polyethylene tightly wrapped around the outside of the inner sheath for protecting the optical cable from damage by solvents and abrasion.

2. The distributed optical fiber incorporated maritime defense network of claim 1, wherein: The marine defense network with the distributed optical fiber further comprises a remote control center (1), the remote control center (1) is connected with the sensing function network body (6) through radio.

3. The distributed optical fiber incorporated maritime defense network of claim 1, wherein: The mode field diameter of the optical fiber core (6031) is 9.2±0.4μm at 1310nm and 10.4±0.5μm at 1550nm.

4. The distributed optical fiber incorporated maritime defense network of claim 1, wherein: The cladding diameter of the optical fiber core (6031) is 124.8±0.7μm, the cladding non-circularity is not more than 0.7%, the core / cladding concentricity error is not more than 0.5μm, and the filler is loose polymer material or gel-like substance coated around the optical fiber.

5. The distributed optical fiber incorporated maritime defense network of claim 1, wherein: The coating diameter of the optical fiber core (6031) is 245±5μm, and the cable cutoff wavelength λcc is not more than 1260nm.

6. The distributed optical fiber incorporated maritime defense network of claim 1, wherein: The attenuation coefficient of the optical fiber core (6031) is not more than 0.36dB / km at 1310nm and not more than 0.25dB / km at 1550nm.

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