Sensing function network system for marine environment integration and preparation method thereof

Abstract

The invention discloses a marine environment integrated sensing function net system and a preparation method thereof, a net body is made of antibacterial polyformaldehyde / ultra-high molecular weight polyethylene bi-component composite fibers, and the antibacterial polyformaldehyde / ultra-high molecular weight polyethylene bi-component composite fibers have the characteristics of high strength, corrosion resistance, wear resistance, self-lubrication, biological adhesion resistance, weather resistance and the like, and are suitable for long-term marine deployment. Optical fiber sensing fibers containing single-mode distributed sensing optical fibers, a polytetrafluoroethylene sleeving and packaging layer and a stainless steel alloy wire woven protection layer are integrated in the net, and various sensing fibers such as basalt fiber base, carbon fiber base, carbon nanofiber base and polysulfonamide fiber base are converted into sensing fibers through an integrated sensor, so that a dual-channel multi-parameter sensing system is formed. And various ocean parameters such as temperature, pressure, water quality and biological activity can be monitored, and ocean water quality and biological activity can be accurately mastered. And the stability and reliability of the sensor are ensured through the protection layer. The preparation method ensures the stability of the net body structure and the accuracy of the sensing function. 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] The present invention relates to the technical field of water treatment, and in particular to a sensor function network system for marine environment integration and a preparation method thereof. Background Art

[0002] With population growth and economic development, the world's dependence on marine resources has reached a new level. The ocean is a treasure trove of resources and a regulator of climate and ecology, but the marine ecosystem is facing many severe challenges.

[0003] The marine ecosystem is complex and fragile. From shallow coral reefs to deep-sea hydrothermal areas, many unique organisms form a closely interdependent ecological network, each with its own place in the food chain and material cycle. However, human activities such as overfishing, pollution, climate change and engineering construction have seriously damaged the balance of marine ecology and threatened its stability and sustainability, making it imperative to deeply understand and effectively protect the marine ecology.

[0004] At present, there are many difficulties in data acquisition in the fields of marine ecological research, fishery management, marine engineering monitoring and national defense security. The traditional method of relying on manual sampling and regular monitoring has its drawbacks. In marine ecological research, manual sampling requires a lot of manpower, material resources and financial resources, and due to the dynamic changes in the marine environment, it is impossible to obtain continuous and real-time data, making it difficult to accurately grasp the dynamic laws and health status of the ecosystem. It is like groping in the dark, lacking scientific and accurate data support.

[0005] Due to the lack of real-time and accurate fishery resource data, fishery managers find it difficult to formulate reasonable fishing strategies, which can easily lead to overfishing, undermine the sustainability of fishery resources, affect the livelihoods of fishermen and the ecological balance of the ocean, and produce a series of chain negative reactions.

[0006] In terms of marine engineering monitoring, many offshore facilities such as oil platforms and submarine cables require real-time and accurate monitoring of marine environmental parameters to ensure safe operation. However, under extreme weather and geological conditions, traditional monitoring methods cannot respond to environmental changes in a timely manner due to delayed data feedback, which may cause serious safety accidents, huge economic losses and environmental pollution, and even threaten the lives and property of coastal residents.

[0007] In the field of national defense and security, marine environmental information is crucial to military operations, but the limitations of traditional monitoring methods make us passive when dealing with maritime security threats, affecting the country's maritime rights and interests and security capabilities.

[0008] The present invention proposes a sensor function network system for marine environment integration and a preparation method thereof. This system innovatively uses antibacterial polyoxymethylene / ultra-high molecular polyethylene two-component composite fiber, which has unique advantages. It has excellent mechanical properties, high strength and modulus, and can withstand the impact of ocean currents and waves in complex, changeable and harsh marine environments, maintain structural stability, and is not easy to break or damage, laying a solid foundation for the long-term and reliable deployment of the sensor function network.

[0009] Polyoxymethylene fiber has good chemical stability and strong tolerance to salinity, pH, etc. in seawater. It is not easily corroded even after long-term immersion, which ensures the stability of the material performance of the sensor functional network, thereby ensuring the accuracy of the monitoring data and the service life of the system.

[0010] Particularly outstanding is its antibacterial property. In the marine environment where microorganisms are easy to breed and attach, it can effectively inhibit the growth and reproduction of microorganisms on the sensor function network, reduce attachment, maintain the cleanliness and normal operation of the network, and greatly improve the reliability and stability of the system.

[0011] By integrating advanced sensor technology, the sensor network can conduct real-time, continuous and all-round monitoring of multiple environmental parameters such as water temperature, salinity, water flow speed, waves, tides, pressure, displacement, and chemical substances, just like building an "intelligent perception nervous system" in the ocean, providing key data support for various fields. It helps reveal ecological mysteries in marine ecological research, provides accurate resource dynamics for fishery management, ensures the safe and stable operation of marine engineering, and enhances the marine environmental intelligence capabilities of national defense and security. It is expected to promote breakthrough development in marine-related fields, has broad application prospects and great practical significance, and provides strong technical support for humans to better understand, protect and utilize marine resources. Summary of the invention

[0012] The object of the present invention is to provide a sensor function network system for marine environment integration that can resist the attachment of marine organisms and a preparation method thereof.

[0013] In order to solve the problems of the prior art, the technical solutions adopted by the present invention are as follows: On the first aspect, the present application provides a multi-parameter sensor function network system for marine environment integration; on the second aspect, the present application provides a processing method for the sensor function network system for marine environment integration.

[0014] The first aspect of the present application provides a sensor function network system for marine environment integration, which includes a control center, a floating body, stainless steel anchor cables, cement positioning anchor blocks, a liftable fence door and a sensor function network. The floating body is evenly distributed above the sensor function network, 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 matched with the stainless steel anchor cables, and the liftable fence doors are set on one side or multiple sides of the sensor function network.

[0015] Furthermore, the sensing function network is composed of antibacterial polyoxymethylene / ultra-high molecular polyethylene two-component composite fiber, a first sensing fiber and a second sensing fiber; the first sensing fiber is a basalt fiber-based sensing fiber, a carbon fiber-based sensing fiber, a carbon nanofiber-based sensing fiber, and a sulfone fiber-based sensing fiber that can monitor many marine parameters such as temperature, pressure, water quality, and biological activity, and is converted into a sensing fiber through an integrated sensor; the second sensing fiber is composed of an inner core optical fiber, a polytetrafluoroethylene sheath layer, a stainless steel alloy wire braided protective layer, and a polytetrafluoroethylene encapsulation layer.

[0016] Basalt fiber-based sensor fiber: Basalt fiber is a pure natural inorganic non-metallic material with many excellent properties such as high strength, electrical insulation, corrosion resistance, and high temperature resistance. The operating temperature range of basalt fiber is wide, generally between -260 and 880°C, and it has excellent high temperature resistance and thermal shock stability. In addition, basalt fiber also has good chemical stability, high elastic modulus and tensile strength, high sound absorption coefficient, good electrical insulation and dielectric properties, and low thermal conductivity.

[0017] Carbon fiber-based sensing fiber: Carbon fiber is a high-strength, high-modulus, lightweight material that is resistant to high temperatures and is widely used in aerospace, rail transit, marine engineering and other fields. Carbon fiber has temperature and force sensing functions, which can be realized based on a single carbon fiber material to develop flexible tactile sensor technology. Carbon fiber has high elastic modulus and tensile strength and can be used to prepare sensors of different sensing types.

[0018] Carbon nanotube-based sensing fibers: Carbon nanotube fibers have excellent electrochemical active area and BET specific surface area, providing stronger physical adsorption capacity, and can be used to prepare fiber sensors with excellent electrochemical performance. Carbon nanotube fibers can further improve their adsorption capacity for specific molecules by introducing carboxyl functional groups on the surface, and can be used for real-time and accurate detection of intracranial nitric oxide and other applications.

[0019] Aromatic sulfone-based sensing fiber: Aromatic sulfone fiber is a synthetic fiber material with good heat resistance and radiation stability, and has electrical insulation and flame retardant properties. It is mainly used in protective products and filter materials. Aromatic sulfone fiber has excellent electrical insulation, heat resistance, dyeability, flame retardancy and stability, and is widely used in aerospace and other fields. The second aspect of the present application provides a method for preparing a sensor function network system for marine environment integration, comprising the following steps: (a) Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene bicomponent composite fibers; (b) Preparation of optical fiber sensing fibers; (c) Weaving a mesh body, weaving the antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber and the optical fiber sensing fiber together to form a mesh body structure; the optical fiber sensing fiber is composed of a first sensing fiber and a second sensing fiber, and the first sensing fiber and the second sensing fiber are respectively inserted into the mesh column in a straight line by a weft insertion method to obtain a sensing function mesh system for marine environment integration. Weaving the first sensing fiber into the mesh body structure can also enhance the longitudinal and transverse strength of the mesh body.

[0020] Further, in step (a), The antibacterial polyoxymethylene is a composite fiber with a skin-core structure, wherein the core layer is composed of ultra-high molecular weight polyethylene (UHMWPE); the outer layer is coated with a blend of hexamethyleneguanidine hydrochloride and polyoxymethylene, which is the surface of the antibacterial polyoxymethylene blend; Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fibers: (a1) Raw material preparation: Outer layer material: ultrafine polyoxymethylene powder is mixed with dimethyl sulfoxide (DMSO) solvent to form a solution; hexamethyleneguanidine hydrochloride antibacterial powder is added to the solution and dispersed with the assistance of ultrasound; the solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the outer layer material; Core layer material: Choose materials with excellent mechanical properties, ultra-high molecular weight polyethylene chips UHMWPE; (a2) Melt preparation: Outer layer melt: The outer layer material antibacterial polyoxymethylene slices are prepared into a melt by melting. Premixing and melting can be performed in a twin-screw extruder to ensure uniform dispersion of the material; Core layer melt: The core layer material ultra-high molecular weight polyethylene chips UHMWPE are prepared into a melt by melting, and are also pre-mixed and melted in a twin-screw extruder to ensure that the material is evenly dispersed; (a3) Twin-screw spinning: using a two-component spinning device for spinning, wherein the mass ratio of the antibacterial polyoxymethylene chips and the ultra-high molecular weight polyethylene chips of the outer layer material is 100:20-100:30; controlling the parameters during the spinning process to achieve uniform composite and continuous extrusion of the fibers; (a4) Fiber curing: Air curing: After the fiber is extruded from the spinneret, it naturally cures in the air. The temperature and humidity in the air will affect the curing speed and performance of the fiber. Cooling: Use cooling device to accelerate the solidification process of fiber and ensure the stability and uniformity of fiber; (a5) Fiber molding: Drafting: Drafting the spun fibers to improve their orientation and mechanical properties. The drafting multiple is usually between 2-5 times. Heat setting: The dimensional stability and mechanical properties of the fiber are improved through heat setting treatment. The heat setting temperature is usually 100-150°C and the time is 1-5 minutes to produce antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fibers.

[0021] Further, in step (a1), an antibacterial polyoxymethylene blend surface is prepared: (a11) cooling the polyoxymethylene spinning chips to below -196°C with liquid nitrogen, slowly adding them into a reaction vessel containing a solvent of dimethyl sulfoxide (DMSO), wherein the weight ratio of the polyoxymethylene spinning chips to the solvent of dimethyl sulfoxide (DMSO) is 1:4-10, stirring at a temperature of 100-150°C in a closed environment for 1.5-6 hours to uniformly disperse the chips to form a solution; (a12) the solid antibacterial powder of hexamethyleneguanidine hydrochloride accounts for 10% to 40% of the total mass of the solid antibacterial powder of hexamethyleneguanidine hydrochloride and the polyoxymethylene spinning chips, and the hexamethyleneguanidine hydrochloride PHMG is slowly added to dimethyl sulfoxide DMSO, and the antibacterial agent is prevented from agglomerating under slow stirring; (a13) Then, ultrasonic assisted dispersion is used, the ultrasonic frequency is set to 20-40 kHz power, and the ultrasonic treatment time is 10-30 minutes to ensure that the antibacterial agent is evenly dispersed in the polyoxymethylene solution; (a14) The solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the dry outer layer material.

[0022] Furthermore, in step (a1), for the outer layer material part, the outer layer material includes polyoxymethylene and hexamethyleneguanidine hydrochloride, the temperature of the area near the feed port is 170-180°C, the temperature of the subsequent area gradually increases, and the temperature of the area near the extruder head is 190-210°C; the outer layer of the antibacterial ultra-high molecular polyethylene is formed by mixing, heating and extruding in a screw machine; the average molecular weight of polyoxymethylene (POM) is 100,000-300,000, and the melt index is 5-12g / 10min; the average molecular weight of the ultra-high molecular polyethylene is 1 million-10 million.

[0023] Furthermore, in step (a2), for the ultra-high molecular weight polyethylene part, the barrel temperature must be higher than its melting point and ensure that the melt has good fluidity; the temperature near the feed port can be 180-200°C, the temperature in the middle area is 220-240°C, and the temperature near the extruder head is 230-250°C; the mold temperature is 190-220°C, and the spinneret temperature is 230-260°C to ensure continuous extrusion of the fiber.

[0024] Further, in step (a3), temperature: the spinning temperature is adjusted according to the melting point and flow characteristics of the material to ensure that the material maintains appropriate fluidity during the spinning process. Generally, the melting temperatures of the skin layer and the core layer are 180-220°C and 200-260°C, respectively; Screw speed: Adjust the screw speed to ensure uniform mixing and stable conveying of the two materials in the screw. Usually the screw speed is between 100-300 rpm; Pressure: Adjust the spinning pressure to ensure that the two materials are evenly mixed and extruded at the spinneret. The pressure is usually 10-50 MPa. Spinning speed: Control the spinning speed to ensure the uniformity and continuity of the fiber. Usually the spinning speed is 100-500 m / min.

[0025] Furthermore, in step (b), the preparation of the optical fiber sensing fiber includes: (b1) Select an inner core optical fiber with a diameter of 4-10µm and a single-mode optical fiber with a wavelength of 1310nm or 1550nm and a relatively low attenuation coefficient; (b2) preparing a polytetrafluoroethylene sheath layer; using an extrusion molding process, adding a polytetrafluoroethylene raw material into an extruder; gradually increasing the temperature from 200°C to 350°C from the feed section to the discharge section, and the screw speed is 20-120 rpm, so that the polytetrafluoroethylene material is uniformly extruded and tightly wrapped on the inner core of the optical fiber, thereby preparing a polytetrafluoroethylene sheath layer; (b3) Preparing a stainless steel alloy wire braided protective layer: selecting a suitable stainless steel alloy wire material for wire drawing so that the diameter of the alloy wire is 0.01-0.05 mm; using a braiding machine for braiding operation, setting a braiding angle of 30°-60°, and setting a braiding density of 10-80 wires per square centimeter according to the protection requirements; braiding the stainless steel alloy wire outside the polytetrafluoroethylene sheath layer according to the set parameters to form a stainless steel alloy wire braided protective layer; (b4) Preparation of polytetrafluoroethylene encapsulation layer: the temperature is controlled at 250-320°C, and the pressure is adjusted according to the tube diameter and extrusion speed to ensure that the polytetrafluoroethylene encapsulation layer is tight, uniform and free of defects; (b5) Wrapping the inner core optical fiber with a polytetrafluoroethylene sheath layer; wrapping the polytetrafluoroethylene sheath layer with a stainless steel alloy wire braided protective layer; and wrapping the polytetrafluoroethylene encapsulation layer with a stainless steel alloy wire braided protective layer.

[0026] Furthermore, in step (b3), the stainless steel alloy wire braided protective layer includes 17-4PH martensitic stainless steel, 2Cr13 martensitic stainless steel or 0Cr 17 One or a combination of Ni4Cu4Nb austenitic stainless steel.

[0027] Furthermore, in step (c), the first sensing fiber is any one of basalt fiber-based sensing fibers, carbon fiber-based sensing fibers, carbon nano-based sensing fibers, or aromatic sulfone-based fibers converted through an integrated sensor, which can monitor a variety of ocean parameters such as temperature, pressure, water quality, and biological activity, and the second sensing fiber is composed of an inner core optical fiber, a polytetrafluoroethylene sheath layer, a stainless steel alloy wire braided protective layer, and a polytetrafluoroethylene encapsulation layer.

[0028] Beneficial effects: The net body of the present invention adopts antibacterial polyoxymethylene / ultra-high molecular polyethylene two-component composite fiber, which has excellent corrosion resistance, resistance to marine biological attachment, high strength and weather resistance, and is suitable for long-term deployment in the marine environment. The optical fiber sensing fiber integrated in the net is composed of a high-precision single-mode distributed optical fiber that can test temperature and displacement parameters, a polytetrafluoroethylene suit layer, a stainless steel alloy wire braided protective layer and a polytetrafluoroethylene encapsulation layer. The optical fiber sensing fiber and the basalt fiber-based sensing fiber that can monitor many marine parameters such as temperature, pressure, water quality, and biological activity, carbon fiber-based sensing fiber, carbon nano-based sensing fiber or aromatic sulfone-based sensing fiber cooperate with single-mode distributed optical fiber sensing to form a dual-channel multi-parameter sensing system, which can accurately monitor marine water quality parameters and biological activities, and ensure the stability and reliability of the sensor through the protective layer. The preparation method involves material preparation and net body weaving steps to ensure the stability of the net body structure and the accuracy of the sensing function. It has strong environmental adaptability and combines sensing technology with traditional net structures. The net can not only operate stably in the marine environment, but also provide accurate sensing data, providing strong support for marine research and monitoring. The network provides an innovative monitoring and defense tool for marine ecological research, fishery production management and engineering security monitoring, and has important scientific and practical value.

[0029] 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 net helps to improve the economic benefits of marine resource utilization. High data monitoring accuracy: The integrated optical fiber sensing fiber uses high-precision optical fiber sensors, which can accurately monitor key parameters such as temperature, salinity, pH value, dissolved oxygen content, chemicals, pressure, etc. in the marine environment, and provide high-quality data support. Strong environmental adaptability: Antibacterial polyoxymethylene / ultra-high molecular polyethylene two-component composite fiber is used. As a net material, it has excellent corrosion resistance and resistance to marine biological attachment, allowing the net to operate stably for a long time in the marine environment without frequent replacement or maintenance.

[0030] (2) Real-time monitoring capability: The sensor network can transmit monitoring data to the monitoring center on shore in real time, providing timely data support for marine environmental research and protection. Biological monitoring function: Through the equipped pressure sensors and acoustic sensors, it can monitor the activities of marine organisms, understand the distribution and activity patterns of marine organisms, and provide important information for marine ecological research.

[0031] (3) Strong environmental adaptability: Antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber is used. As a mesh material, it has excellent corrosion resistance and resistance to marine biological attachment, allowing the mesh to operate stably for a long time in the marine environment without frequent replacement or maintenance. Good structural stability: The mesh is woven with a chain and weft structure to ensure the morphological stability of the mesh in the marine environment. Easy to deploy and maintain: The design of the sensor function network takes into account the convenience of actual deployment and maintenance, is easy to install and recycle, and reduces operating costs.

[0032] (4) Enhance marine resource management: By providing key environmental parameters, the network helps marine fishery management and marine engineering monitoring, helping managers to develop more effective resource management strategies. Promote marine scientific research: The network can provide marine scientists with long-term and continuous marine environmental data, promoting in-depth research on marine ecosystems.

[0033] (5) Improve early warning capabilities: By real-time monitoring of changes in the marine environment, the network can promptly warn of possible environmental risks and provide protection for the safe operation of marine engineering facilities. Environmentally friendly: The materials and design of the sensor network reduce interference with the marine environment and are an environmentally friendly monitoring tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A schematic diagram of the structure of a sensor function network system for marine environment integration provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of the sensor function network provided in the embodiment of the present application; Figure 3 A schematic diagram of the structure of the optical fiber sensing fiber provided in the embodiment of the present application; Among them, 1 control center, 2 floating body, 3 stainless steel anchor cable, 4 cement positioning anchor block, 5 liftable fence door, 6 sensing function network, 601 first sensing fiber, 602 second sensing fiber, 603 antibacterial polyoxymethylene / ultra-high molecular polyethylene two-component composite fiber, 604 polytetrafluoroethylene encapsulation layer, 605 stainless steel alloy wire braided protective layer, 606 polytetrafluoroethylene suit layer, 607 inner core optical fiber. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] In this application, the term "and / or" describes the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0038] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can all mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can be single or multiple.

[0039] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution, some or all of the steps can be executed in parallel or sequentially, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0040] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0041] The weight of the relevant components mentioned in the embodiment description of the present application can not only refer to the specific content of each component, but also indicate the proportional relationship between the weights of the components. Therefore, as long as the content of the relevant components is proportionally enlarged or reduced according to the embodiment description of the present application, it is within the scope disclosed in the embodiment description of the present application. Specifically, the mass described in the embodiment description of the present application can be a mass unit known in the chemical industry such as µg, mg, g, kg, etc.

[0042] In a first aspect, an embodiment of the present application provides a sensor function network system for marine environment integration, the sensor function network system for marine environment integration includes a control center 1, a floating body 2, a stainless steel anchor cable 3, a cement positioning anchor block 4, a liftable fence gate 5 and a sensor function network 6, the floating body 2 is evenly distributed above the sensor function network 6, the stainless steel anchor cable 3 is connected to the floating body 2 and the cement positioning anchor block 4, the cement positioning anchor block 4 is set on the seabed and adapted to the stainless steel anchor cable 3, and the liftable fence gate 5 is set on one side or multiple sides of the sensor function network 6.

[0043] In some embodiments, the sensing function network 6 is composed of an antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber 603, a first sensing fiber 601, and a second sensing fiber 602; the first sensing fiber 601 is a basalt fiber-based sensing fiber, a carbon fiber-based sensing fiber, a carbon nano-based sensing fiber, or a sulfone-based sensing fiber, and the second sensing fiber 602 is composed of an inner core optical fiber, a polytetrafluoroethylene sheath layer, a stainless steel alloy wire braided protective layer, and a polytetrafluoroethylene encapsulation layer; Basalt fiber-based sensor fiber: Basalt fiber is a pure natural inorganic non-metallic material with many excellent properties such as high strength, electrical insulation, corrosion resistance, and high temperature resistance. The operating temperature range of basalt fiber is wide, generally between -260 and 880°C, and it has excellent high temperature resistance and thermal shock stability. In addition, basalt fiber also has good chemical stability, high elastic modulus and tensile strength, high sound absorption coefficient, good electrical insulation and dielectric properties, and low thermal conductivity.

[0044] Carbon fiber-based sensing fiber: Carbon fiber is a high-strength, high-modulus, lightweight material that is resistant to high temperatures and is widely used in aerospace, rail transit, marine engineering and other fields. Carbon fiber has temperature and force sensing functions, which can be realized based on a single carbon fiber material to develop flexible tactile sensor technology. Carbon fiber has high elastic modulus and tensile strength and can be used to prepare sensors of different sensing types.

[0045] Carbon nanotube-based sensing fibers: Carbon nanotube fibers have excellent electrochemical active area and BET specific surface area, providing stronger physical adsorption capacity, and can be used to prepare fiber sensors with excellent electrochemical performance. Carbon nanotube fibers can further improve their adsorption capacity for specific molecules by introducing carboxyl functional groups on the surface, and can be used for real-time and accurate detection of intracranial nitric oxide and other applications.

[0046] Aromatic sulfone-based sensor fiber: Aromatic sulfone fiber is a synthetic fiber material with good heat resistance and radiation stability, electrical insulation and flame retardant properties, and is mainly used in protective products and filter materials. Aromatic sulfone fiber has excellent electrical insulation, heat resistance, dyeability, flame retardancy and stability, and is widely used in aerospace and other fields.

[0047] In some embodiments, the second sensing fiber 602 is composed of an inner core optical fiber 607, a polytetrafluoroethylene jacket layer 606, a stainless steel alloy wire braided protective layer 605, and a polytetrafluoroethylene packaging layer 604; i. Inner core optical fiber 607 uses single-mode optical fiber with a relatively low attenuation coefficient of 1310nm or 1550nm; high-precision detection: 4~10µm flexible optical fiber is used as the inner core, and single-mode optical fiber with a relatively low attenuation coefficient of 1310nm or 1550nm is selected, with an attenuation coefficient of 0.3-0.5 dB / km or 0.2-0.3 dB / km, respectively, a dispersion coefficient of less than 3.5ps / km·nm or 18ps / km·nm, and a bandwidth greater than 250 GHz·km. It uses mid-infrared laser transmission and has extremely high sensitivity and accuracy. It can accurately detect various parameters in the marine environment, such as temperature, pressure, strain, etc., through the characteristics of light transmission and reflection. Optical fiber sensors have the advantages of anti-electromagnetic interference, corrosion resistance, and small size, and are suitable for use in marine environments. Stable signal transmission: Optical fiber can stably transmit the detected signal and is not affected by electromagnetic interference and noise in the marine environment. This ensures the accuracy and reliability of the sensing data and provides high-quality data support for marine environmental monitoring and research.

[0048] ii. Polytetrafluoroethylene sheath layer 604, wrapping the inner core optical fiber; Corrosion protection: Polytetrafluoroethylene has excellent corrosion resistance and can effectively protect the optical fiber from the corrosion of salt, chemicals and microorganisms in the marine environment. In the marine environment, seawater is very corrosive, and the polytetrafluoroethylene sheath can extend the service life of the optical fiber and ensure the long-term stable operation of the optical fiber sensing fiber. Good insulation performance: Polytetrafluoroethylene is a good insulating material that can prevent the optical fiber from contacting with external conductive materials and avoid problems such as signal interference and leakage. This is crucial for accurate sensing detection in the marine environment.

[0049] iii. Stainless steel alloy wire braided protective layer 605, wrapped with polytetrafluoroethylene suit layer 604; Enhanced mechanical strength: Basalt fiber-based sensing fiber, carbon fiber-based sensing fiber, carbon nano-based sensing fiber or aromatic sulfone-based sensing fiber braided layer provides additional mechanical strength for optical fiber sensing fiber. In the marine environment, optical fiber sensing fiber may be subjected to external forces such as water flow impact and marine organism collision. Basalt fiber-based sensing fiber, carbon fiber-based sensing fiber, carbon nano-based sensing fiber or aromatic sulfone-based braided layer can effectively protect the optical fiber and polytetrafluoroethylene wrapping layer to prevent damage. Tensile resistance: Basalt fiber-based sensing fiber, carbon fiber-based sensing fiber, carbon nano-based sensing fiber or aromatic sulfone-based sensing fiber has high tensile strength and can withstand a certain amount of tension. This makes the mesh body less likely to be broken during installation and use, improving its reliability and durability.

[0050] iv. The polytetrafluoroethylene encapsulation layer 606 encapsulates the stainless steel alloy wire braided protective layer 605. Further strengthening the corrosion resistance: The outermost encapsulation polytetrafluoroethylene further enhances the corrosion resistance of the optical fiber sensing fiber.

[0051] The second aspect of the present application provides a method for preparing a sensor function network system for marine environment integration, comprising the following steps: (a) Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene bicomponent composite fiber 603; (b) Preparation of optical fiber sensing fibers; (c) Weaving a mesh body, weaving the antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber 603 and the optical fiber sensing fiber together to form a mesh body structure; the optical fiber sensing fiber is composed of a first sensing fiber 601 and a second sensing fiber 602, and the first sensing fiber 601 and the second sensing fiber 602 are respectively inserted into the mesh column in a straight line by a weft insertion method to obtain a sensing function network system for marine environment integration. The first sensing fiber 601 is woven into the mesh body structure to enhance the longitudinal and transverse strength of the mesh body.

[0052] In some embodiments, in step (c), the first sensing fiber 601 is any one of basalt fiber-based sensing fiber, carbon fiber-based sensing fiber, carbon nano-based sensing fiber or aromatic sulfone-based sensing fiber, and the second sensing fiber 602 is composed of a single-mode distributed optical fiber, a polytetrafluoroethylene sheath layer, a stainless steel alloy wire braided protective layer and a polytetrafluoroethylene encapsulation layer. In the step of weaving basalt fiber-based sensing fiber, carbon fiber-based sensing fiber, carbon nano-based sensing fiber or aromatic sulfone-based sensing fiber into the net knot, at the intersection, the basalt fiber-based sensing fiber, carbon fiber-based sensing fiber, carbon nano-based sensing fiber or aromatic sulfone-based sensing fiber forms a cross state to enhance the strength of the net knot structure. The protective net adopts a braided chain and weft-inserted structure, which is connected by the net edge with a reed eye to form a large area coverage. The mesh is square, rectangular or diamond-shaped, and is produced by a six-comb warp knitting machine, of which four combs are used for loop weaving, and the other two combs are respectively woven into the optical cable and stainless wire in the form of weft-inserted.

[0053] This structural design not only ensures the strength of the net, but also facilitates the integration of optical fiber sensing fibers. The net knot is woven by four different yarns to form longitudinal strength. The optical fiber sensing fibers are inserted into the net column in a straight line through the weft insertion method to enhance the strength, stability and sensing function of the net column. This weaving method not only improves the overall performance of the net, but also provides structural support for the integration of optical fiber sensing fibers. This fine weaving process ensures the structural stability of the net and the reliability of the sensing function.

[0054] In step (a), the antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber 603 is a composite fiber with a skin-core structure, wherein the core layer is composed of ultra-high molecular weight polyethylene UHMWPE; and the outer layer is coated with a blend of hexamethyleneguanidine hydrochloride and polyoxymethylene, i.e., the antibacterial polyoxymethylene surface; Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber 603: (a1) Raw material preparation: Outer layer material: ultrafine polyoxymethylene powder is mixed with dimethyl sulfoxide (DMSO) solvent to form a solution; hexamethyleneguanidine hydrochloride antibacterial powder is added to the solution and dispersed with the assistance of ultrasound; the solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the outer layer material; Core layer material: Choose materials with excellent mechanical properties, ultra-high molecular weight polyethylene chips UHMWPE; In step (a1), for the outer layer material part, the outer layer material includes polyoxymethylene and hexamethyleneguanidine hydrochloride, the temperature of the area near the feed port is 170-180°C, the temperature of the subsequent area gradually increases, and the temperature of the area near the extruder head is 190-210°C; the outer layer of the antibacterial ultra-high molecular polyethylene is formed by mixing, heating and extruding in a screw machine; the average molecular weight of polyoxymethylene POM is 100,000-300,000, and the melt index is 5-12g / 10min; the average molecular weight of ultra-high molecular polyethylene is 1 million-10 million. Mold temperature: The mold temperature has an important influence on the molding and quality of the fiber; the mold temperature is controlled at 190-220°C, so that the two-component melt extruded from the extruder can be well molded in the mold and the dimensional stability of the fiber is guaranteed.

[0055] (a2) Melt preparation: Outer layer melt: The outer layer material antibacterial polyoxymethylene chips are melted to prepare a melt. Premixing and melting can be performed in a twin-screw extruder to ensure uniform dispersion of the material; Core layer melt: The core layer material ultra-high molecular weight polyethylene chips UHMWPE are prepared into a melt by melting, and are also pre-mixed and melted in a twin-screw extruder to ensure that the material is evenly dispersed; (a3) Twin-screw spinning: using a two-component spinning device for spinning, wherein the mass ratio of the antibacterial polyoxymethylene chips and the ultra-high molecular weight polyethylene chips of the outer layer material is 100:20-100:30; controlling the parameters during the spinning process to achieve uniform composite and continuous extrusion of the fibers; (a4) Fiber curing: Air curing: After the fiber is extruded from the spinneret, it naturally cures in the air. The temperature and humidity in the air will affect the curing speed and performance of the fiber. Cooling: Use cooling device to accelerate the solidification process of fiber and ensure the stability and uniformity of fiber; (a5) Fiber molding: Drafting: Drafting the spun fibers to improve their orientation and mechanical properties. The drafting multiple is usually between 2-5 times. Heat setting: The dimensional stability and mechanical properties of the fiber are improved through heat setting treatment. The heat setting temperature is usually 100-150°C and the time is 1-5 minutes to produce antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fibers.

[0056] In some embodiments, in step (a1), an antimicrobial polyoxymethylene surface is prepared: (a11) cooling the polyoxymethylene spinning chips to below -196°C with liquid nitrogen, slowly adding them into a reaction vessel containing a solvent of dimethyl sulfoxide (DMSO), wherein the weight ratio of the polyoxymethylene spinning chips to the solvent of dimethyl sulfoxide (DMSO) is 1:4-10, stirring at a temperature of 100-150°C in a closed environment for 1.5-6 hours to uniformly disperse the chips to form a solution; (a12) the solid antibacterial powder of hexamethyleneguanidine hydrochloride accounts for 10% to 40% of the total mass of the solid antibacterial powder of hexamethyleneguanidine hydrochloride and the polyoxymethylene spinning chips, and the hexamethyleneguanidine hydrochloride PHMG is slowly added to dimethyl sulfoxide DMSO, and the antibacterial agent is prevented from agglomerating under slow stirring; (a13) Then, ultrasonic assisted dispersion is used, the ultrasonic frequency is set to 20-40 kHz power, and the ultrasonic treatment time is 10-30 minutes to ensure that the antibacterial agent is evenly dispersed in the ultra-high molecular weight polyethylene solution; (a14) The solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the dry outer layer material.

[0057] In some embodiments, in step (a3), temperature: the spinning temperature is adjusted according to the melting point and flow characteristics of the material to ensure that the material maintains appropriate fluidity during the spinning process. Generally, the melting temperatures of the skin layer and the core layer are 180-220° C. and 200-260° C., respectively; Screw speed: Adjust the screw speed to ensure uniform mixing and stable conveying of the two materials in the screw. Usually the screw speed is between 100-300 rpm; Pressure: Adjust the spinning pressure to ensure that the two materials are evenly mixed and extruded at the spinneret. The pressure is usually 10-50 MPa. Spinning speed: Control the spinning speed to ensure the uniformity and continuity of the fiber. Usually the spinning speed is 100-500 m / min.

[0058] In some embodiments, in step (b), preparing the optical fiber sensing fiber comprises: (b1) selecting an inner core optical fiber 607 with a diameter of 4-10 µm and using a single-mode distributed optical fiber with a wavelength of 1310 nm or 1550 nm and a relatively low attenuation coefficient; (b2) preparing a polytetrafluoroethylene sheath layer 606; using an extrusion molding process, adding a polytetrafluoroethylene raw material into an extruder; gradually increasing the temperature from 200°C to 350°C from the feed section to the discharge section, and the screw speed is 20-120 rpm, so that the polytetrafluoroethylene material is uniformly extruded and tightly wrapped on the inner core of the optical fiber, thereby preparing a polytetrafluoroethylene sheath layer; (b3) preparing a stainless steel alloy wire braided protective layer 605: selecting a suitable stainless steel alloy wire material for wire drawing so that the diameter of the alloy wire is 0.01-0.05 mm; using a braiding machine for braiding operation, setting a braiding angle of 30°-60°, and setting a braiding density of 10-80 wires per square centimeter according to the protection requirements; braiding the stainless steel alloy wire outside the polytetrafluoroethylene sheath layer according to the set parameters to form a stainless steel alloy wire braided protective layer; (b4) preparing the polytetrafluoroethylene encapsulation layer 604: the temperature is controlled at 250-320° C., and the pressure is adjusted according to the tube diameter and the extrusion speed to ensure that the polytetrafluoroethylene encapsulation layer is tight, uniform and free of defects; (b5) Wrap the inner core optical fiber 607 with the polytetrafluoroethylene sheath layer 606; wrap the stainless steel alloy wire braided protective layer with the polytetrafluoroethylene sheath layer 606; and wrap the stainless steel alloy wire braided protective layer 605 with the polytetrafluoroethylene encapsulation layer 604.

[0059] In some embodiments, ultra-high molecular weight polyethylene UHMWPE: ultra-high molecular weight polyethylene particles with high purity and an average molecular weight of 1 million to 10 million are selected, polyoxymethylene POM: high purity and an average molecular weight of 100,000 to 300,000 are selected, the melt index is 5-12g / 10min, the crystallinity of homopolyoxymethylene is 75% to 85%, and the crystallinity of copolymer polyoxymethylene is 70% to 75%; hexamethyleneguanidine hydrochloride PHMG: the antibacterial agent powder of hexamethyleneguanidine hydrochloride PHMG is used to blend with ultra-high molecular weight polyethylene to prepare the outer layer material; solvent: dimethyl sulfoxide DMSO.

[0060] In some embodiments, in step (b3), the stainless steel alloy wire braided protective layer 605 includes 17-4PH martensitic stainless steel, 2Cr13 martensitic stainless steel or 0Cr 17 One or a combination of Ni4Cu4Nb austenitic stainless steel.

[0061] In some embodiments, the stainless steel alloy wire braided protective layer 605 is 0Cr 17 Ni4Cu4Nb austenitic stainless steel. Requires high strength and corrosion resistance 0Cr 17Ni4Cu4Nb austenite is combined with basalt fiber-based sensing fiber, carbon fiber-based sensing fiber, carbon nano-based sensing fiber or aromatic sulfone-based sensing fiber to ensure that the structural strength of the net can be enhanced in the marine environment.

[0062] In some embodiments, the preparation of the optical fiber sensing fiber includes: preparing an inner core optical fiber; Prepare a polytetrafluoroethylene suit layer 606; Prepare a stainless steel alloy wire braided protective layer 605; Prepare a polytetrafluoroethylene encapsulation layer 604. This fiber has a special structural design and a sensing function, and can accurately detect various parameters in the marine environment.

[0063] Water quality monitoring: The network integrates sensors that can monitor key parameters of ocean water quality, such as temperature, salinity, pH, dissolved oxygen content, chemicals, etc. These data are crucial to understanding the health of the marine environment and can be transmitted to the monitoring center on shore in real time, providing important data support for marine environmental research and protection.

[0064] Marine life monitoring: The net is equipped with sensors such as pressure sensors and acoustic sensors to detect the activities of marine life. These sensors can sense when marine life approaches or collides with the net, or monitor the sound signals of marine life, so as to understand the distribution and activity patterns of marine life. Example 1

[0065] The present invention discloses a sensor function network system for marine environment integration, which includes a control center 1, a floating body 2, a stainless steel anchor cable 3, a cement positioning anchor block 4, a liftable fence door 5 and a sensor function network 6. The floating body 2 is evenly distributed above the sensor function network 6, the stainless steel anchor cable 3 is connected to the floating body 2 and the cement positioning anchor block 4, the cement positioning anchor block 4 is arranged on the seabed and is compatible with the stainless steel anchor cable 3, and the liftable fence door 5 is arranged on one side or multiple sides of the sensor function network 6.

[0066] The sensing function network 6 is composed of antibacterial polyoxymethylene / ultra-high molecular polyethylene two-component composite fiber, a first sensing fiber and a second sensing fiber. The sensing function network is composed of antibacterial polyoxymethylene / ultra-high molecular polyethylene two-component composite fiber, a first sensing fiber 601 and a second sensing fiber 602; the first sensing fiber 601 is a basalt fiber-based sensing fiber, a carbon fiber-based sensing fiber, a carbon nano-based sensing fiber or a sulfone-based sensing fiber, and the second sensing fiber 602 is composed of a single-mode distributed optical fiber 607, a polytetrafluoroethylene sheath layer 606, a stainless steel alloy wire braided protective layer 605 and a polytetrafluoroethylene encapsulation layer 604; The optical fiber sensing fiber 602 is composed of a single-mode distributed optical fiber 607, a polytetrafluoroethylene sheath layer 606, a stainless steel alloy wire braided protective layer 605 and a polytetrafluoroethylene encapsulation layer 604; i. Single-mode distributed optical fiber 607, using single-mode optical fiber with a relatively low attenuation coefficient of 1310nm or 1550nm; high-precision detection: 4~10µm flexible optical fiber as the inner core, using single-mode optical fiber with a relatively low attenuation coefficient of 1310nm or 1550nm, the attenuation coefficient is about 0.3-0.5 dB / km or 0.2-0.3 dB / km, the dispersion coefficient is less than 3.5ps / km·nm or 18ps / km·nm, and the bandwidth is greater than 250 GHz·km. It adopts mid-infrared laser transmission, with extremely high sensitivity and accuracy. It can accurately detect various parameters in the marine environment, such as temperature, pressure, strain, etc. through the characteristics of light transmission and reflection. Optical fiber sensors have the advantages of anti-electromagnetic interference, corrosion resistance, and small size, and are suitable for use in marine environments. Stable signal transmission: Optical fiber can stably transmit the detected signal and is not affected by electromagnetic interference and noise in the marine environment. This ensures the accuracy and reliability of sensing data and provides high-quality data support for marine environmental monitoring and research.

[0067] ii. Polytetrafluoroethylene sheath layer 604, wrapping single-mode distributed optical fiber 607; Corrosion protection: Polytetrafluoroethylene has excellent corrosion resistance and can effectively protect the optical fiber from the corrosion of salt, chemicals and microorganisms in the marine environment. In the marine environment, seawater is very corrosive. The polytetrafluoroethylene sheath can extend the service life of the optical fiber and ensure the long-term stable operation of the optical fiber sensor fiber. Good insulation performance: Polytetrafluoroethylene is a good insulating material that can prevent the optical fiber from contacting with external conductive substances and avoid signal interference and leakage. This is essential for accurate sensing detection in the marine environment.

[0068] iii. a stainless steel alloy wire braided protective layer 605, wrapped with a polytetrafluoroethylene sheath layer 604; iv. Polytetrafluoroethylene encapsulation layer 606, wrapped with stainless steel alloy wire braided protective layer 605. Strengthening corrosion resistance again: The outermost layer of polytetrafluoroethylene further enhances the corrosion resistance of the optical fiber sensing fiber. It provides a smooth surface for the entire optical fiber sensing fiber, reducing the possibility of marine organisms attaching. Protecting the internal structure: The outermost layer of polytetrafluoroethylene plays a role in protecting the internal optical fiber. It can prevent the external environment from damaging the internal structure of the optical fiber sensing fiber and ensure the normal functioning of the sensing function.

[0069] Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fibers: 1. Material preparation Ultra-high molecular weight polyethylene UHMWPE: Select high-purity ultra-high molecular weight polyethylene particles with an average molecular weight of 1-10 million to ensure that they have good spinnability and mechanical properties as the core layer material.

[0070] Polyoxymethylene POM: Select high purity, average molecular weight of 100,000-300,000, melt index of 5-12g / 10min, and high crystallinity (the crystallinity of homopolyoxymethylene is 75%~85%, and that of copolymerization is 70%~75%), which makes it have excellent comprehensive properties, including high hardness, resistance to biological adhesion, high modulus, good dimensional stability, outstanding fatigue resistance and good resistance to chemical corrosion.

[0071] Hexamethyleneguanidine hydrochloride PHMG: The antibacterial powder of hexamethyleneguanidine hydrochloride PHMG is used to blend with ultra-high molecular polyethylene to prepare the outer layer material.

[0072] Solvent: Solvent dimethyl sulfoxide DMSO, the role of the solvent is to reduce the viscosity of the polyoxymethylene spinning material during the blending process to make the blending more uniform.

[0073] 2. Equipment Preparation Two-component spinning equipment: including twin-screw extruder, spinning assembly, winding device, etc. The extruder has precise temperature control and pressure regulation functions to meet the processing requirements of different materials. The spinning assembly is to ensure the separate feeding and uniform compounding of the core layer and the outer layer materials. The winding device must ensure the stability of the spinning speed and the winding quality of the fiber.

[0074] Ultrasonic equipment: Ultrasonic waves are used to assist dispersion during the blending process of the outer layer material, and it is equipped with an ultrasonic generator, a transducer and a probe.

[0075] 3. Preparation of antibacterial polyoxymethylene slices (a11) slowly adding a certain amount of polyoxymethylene spinning chips into a reaction vessel containing a solvent of dimethyl sulfoxide (DMSO), wherein the weight ratio of the polyoxymethylene spinning chips to the solvent of dimethyl sulfoxide (DMSO) is 1:4-10, and stirring at a temperature of 100-150° C. for 1.5-6 hours in a closed environment to uniformly disperse the chips to form a solution; (a12) solid antibacterial powder of hexamethyleneguanidine hydrochloride (purity greater than 99%) accounts for 10%-40% of the total material mass, and hexamethyleneguanidine hydrochloride PHMG is slowly added to the solution solvent dimethyl sulfoxide DMSO, while slowly stirring to prevent the antibacterial agent from agglomerating; (a13) Then, ultrasonic assisted dispersion is used, the ultrasonic frequency is set to 20-40 kHz power, and the ultrasonic treatment time is 10-30 minutes to ensure that the antibacterial agent is evenly dispersed in the ultra-high molecular weight polyethylene solution; (a14) The solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the dry outer layer material.

[0076] The antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber 603 is a composite fiber with a skin-core structure. The core is ultra-high molecular weight polyethylene UHMWPE and the outer layer material is coated with antibacterial polyoxymethylene. The spinning process is as follows: (a2) Melt preparation: Outer layer melt: The outer layer material antibacterial polyoxymethylene slices are prepared into a melt by melting. Premixing and melting can be performed in a twin-screw extruder to ensure uniform dispersion of the material; Core layer melt: The core layer material ultra-high molecular weight polyethylene chips UHMWPE are prepared into a melt by melting, and are also pre-mixed and melted in a twin-screw extruder to ensure that the material is evenly dispersed; (a3) Spinning process Temperature parameters: Barrel temperature: For the outer layer material (antibacterial polyoxymethylene), the temperature of the area near the feed port is 170-180°C, and the temperature of the subsequent areas gradually increases, and the temperature of the area near the extruder head is 190-210°C; because polyoxymethylene is a material that is easily decomposed, excessively high temperature will cause decomposition to produce irritating and corrosive gases, so the temperature control must be precise and not too high; For the ultra-high molecular weight polyethylene part, the barrel temperature should be higher than its melting point and ensure good melt fluidity; the temperature near the feed port can be 180-200°C, the temperature in the middle area is 220-240°C, and the temperature near the extruder head is 230-250°C; The mass ratio of polyoxymethylene spinning chips to hexamethyleneguanidine hydrochloride PHMG in the outer layer material is 100:3-10; Mold temperature: Mold temperature has an important influence on the molding and quality of the fiber. The mold temperature is controlled at 190-220℃, so that the two-component melt extruded from the extruder can be well molded in the mold and the dimensional stability of the fiber is guaranteed.

[0077] Spinneret temperature: The spinneret temperature is usually close to or slightly higher than the barrel temperature close to the die head, and is maintained at 230-260°C to ensure that the two-component melt has good fluidity when it is ejected from the spinneret, to prevent the melt from solidifying or deteriorating in fluidity at the spinneret, and to ensure continuous extrusion of the fiber.

[0078] The mass ratio of polyoxymethylene spinning chips to hexamethyleneguanidine hydrochloride PHMG in the outer layer material is 100:3-10; Mold temperature: Mold temperature has an important influence on the molding and quality of the fiber; the mold temperature is controlled at 190-220℃ so that the two-component melt extruded from the extruder can be well formed in the mold and the dimensional stability of the fiber is guaranteed.

[0079] Spinneret temperature: The spinneret temperature is usually close to or slightly higher than the barrel temperature close to the die head, and is maintained at 230-260°C to ensure that the two-component melt has good fluidity when it is ejected from the spinneret, to prevent the melt from solidifying or deteriorating in fluidity at the spinneret, and to ensure continuous extrusion of the fiber.

[0080] The mass ratio of the outer layer material polyoxymethylene spinning chips to hexamethyleneguanidine hydrochloride PHMG is 100:3-10; Pressure parameters: Extrusion pressure: The extrusion pressure needs to be high enough to push the two-component melt through the extruder and spinneret. The extrusion pressure is 180-250MPa. The specific pressure value should be adjusted according to the ratio of polyoxymethylene and ultra-high molecular weight polyethylene, molecular weight, melt viscosity and the performance of the extrusion equipment. If the pressure is too low, the melt may not be extruded smoothly; if the pressure is too high, it may damage the equipment.

[0081] Holding pressure: Holding pressure has an important influence on the dimensional stability and internal structural uniformity of the fiber. The holding pressure is 50%-80% of the extrusion pressure. The holding time is determined according to factors such as the fiber specifications and extrusion speed, and is usually between 5-20s.

[0082] Speed ​​parameters: Screw speed: The selection of screw speed should comprehensively consider the material supply and the extrusion speed of the melt. For twin-screw extruders, the screw speed is usually between 15-35r / min. If the speed is too fast, the material will be subjected to excessive shearing in the barrel, causing the melt temperature to rise too quickly, which may cause the decomposition of polyoxymethylene or the performance change of ultra-high molecular polyethylene; if the speed is too slow, it will affect production efficiency.

[0083] Pulling speed: Pulling speed determines the stretching degree and diameter of the fiber. If the pulling speed is too fast, the fiber will be overstretched, resulting in reduced fiber strength and elongation at break; if the pulling speed is too slow, the fiber diameter will increase, affecting the fiber performance and appearance. The pulling speed is between 10-20m / min, and the specific value needs to be adjusted according to the fiber specifications and performance requirements.

[0084] Other parameters: Spinneret aperture and number of holes: The aperture and number of holes in the spinneret will affect the fineness and yield of the fiber. The aperture is between 0.3-0.8mm, and the number of holes ranges from 24 to 200.

[0085] Air gap length: The air gap length refers to the distance from the spinneret to the coagulation bath or cooling device. If the air gap length is too short, the melt will not have enough time to cool and solidify, which may cause fiber adhesion; if the air gap length is too long, the melt will be exposed to the air for too long and may be affected by external factors such as oxidation and moisture absorption. The air gap length is between 10-20mm.

[0086] In step (a3), temperature: the spinning temperature is adjusted according to the melting point and flow characteristics of the material to ensure that the material maintains appropriate fluidity during the spinning process. Generally, the melting temperatures of the skin layer and the core layer are 180-220°C and 200-260°C respectively; Screw speed: Adjust the screw speed to ensure uniform mixing and stable conveying of the two materials in the screw. Usually the screw speed is between 100-300 rpm; Pressure: Adjust the spinning pressure to ensure that the two materials are evenly mixed and extruded at the spinneret. The pressure is usually 10-50 MPa. Spinning speed: Control the spinning speed to ensure the uniformity and continuity of the fiber. Usually the spinning speed is 100-500 m / min.

[0087] The stainless steel alloy wire braided protective layer 605 is 2Cr13 martensitic stainless steel.

[0088] (a4) Fiber curing: Air curing: After the fiber is extruded from the spinneret, it naturally cures in the air. The temperature and humidity in the air will affect the curing speed and performance of the fiber. Cooling: Use cooling device to accelerate the solidification process of fiber and ensure the stability and uniformity of fiber; (a5) Fiber molding: Drafting: Drafting the spun fibers to improve their orientation and mechanical properties. The drafting multiple is usually between 2-5 times. Heat setting: The dimensional stability and mechanical properties of the fiber are improved through heat setting treatment. The heat setting temperature is usually 100-150°C and the time is 1-5 minutes to produce antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fibers. Example 2

[0089] The difference between Example 2 and Example 1 is that the stainless steel alloy wire braided protective layer 605 is 17-4PH martensitic stainless steel. Example 3

[0090] The difference between Example 3 and Example 1 is that the stainless steel alloy wire braided protective layer 605 is 0Cr 17 Ni4Cu4Nb austenitic stainless steel. Example 4

[0091] A method for preparing a sensor function network system for marine environment integration of the present invention comprises the following steps: (a) Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene bicomponent composite fiber 603; (b) Preparation of optical fiber sensing fibers; (c) Weaving a mesh body, weaving the antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber 603 and the optical fiber sensing fiber together to form a mesh body structure; the optical fiber sensing fiber is composed of a first sensing fiber and a second sensing fiber, and the first sensing fiber and the second sensing fiber are respectively inserted into the mesh column in a straight line by a weft insertion method to obtain a sensing function mesh system for marine environment integration. The first sensing fiber is woven into the mesh body structure to enhance the longitudinal and transverse strength of the mesh body.

[0092] In step (a), The antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber 603 is a composite fiber with a skin-core structure, wherein the core layer is composed of ultra-high molecular weight polyethylene UHMWPE; the outer layer is coated with a blend of hexamethyleneguanidine hydrochloride and polyoxymethylene, i.e., the antibacterial polyoxymethylene blend surface; Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber 603: (a1) Ultrafine polyoxymethylene powder is mixed with dimethyl sulfoxide (DMSO) solvent to form a solution; hexamethyleneguanidine hydrochloride antibacterial powder is added to the solution and dispersed by ultrasound; the solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain the antibacterial polyoxymethylene blend surface of the outer layer material; for the outer layer material part, the outer layer material includes polyoxymethylene and hexamethyleneguanidine hydrochloride, the temperature of the area near the feed port is 180°C, and the temperature of the subsequent area gradually increases, and the temperature of the area near the extruder head is 200°C; the outer layer of the antibacterial ultra-high molecular polyethylene is formed by mixing, heating and extruding in a screw machine; the average molecular weight of polyoxymethylene POM is 200,000, and the melt index is 12g / 10min; the average molecular weight of ultra-high molecular polyethylene is 10 million.

[0093] (a11) cooling the polyoxymethylene spinning chips to below -196°C with liquid nitrogen, slowly adding them into a reaction vessel containing a solvent of dimethyl sulfoxide (DMSO), wherein the weight ratio of the polyoxymethylene spinning chips to the solvent of dimethyl sulfoxide (DMSO) is 1:4, and stirring is performed in a closed environment at a temperature of 120°C for 6 hours to uniformly disperse the chips to form a solution; (a12) The solid antibacterial powder of hexamethyleneguanidine hydrochloride accounts for 10% of the total mass of the solid antibacterial powder of hexamethyleneguanidine hydrochloride and the polyoxymethylene spinning chips. The hexamethyleneguanidine hydrochloride PHMG is slowly added into dimethyl sulfoxide DMSO, and the antibacterial agent is prevented from agglomerating under slow stirring; (a13) Then, ultrasonic assisted dispersion was used, the ultrasonic frequency was set to 30 kHz power, and the ultrasonic treatment time was set to 10 minutes to ensure that the antibacterial agent was evenly dispersed in the ultra-high molecular weight polyethylene solution; (a14) The solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the dry outer layer material.

[0094] (a2) Spinning is performed using a two-component spinning device, wherein the mass ratio of the antibacterial polyoxymethylene blend of the outer layer material to the ultra-high molecular weight polyethylene is 100:25; for the ultra-high molecular weight polyethylene portion, the barrel temperature must be higher than its melting point and ensure that the melt has good fluidity; the temperature near the feed port can be 180°C, the temperature in the middle area is 230°C, and the temperature near the extruder head is 250°C; the mold temperature is 220°C, and the spinneret temperature is 250°C to ensure continuous extrusion of the fiber.

[0095] (a3) controlling the temperature parameters, pressure parameters and speed parameters during the spinning process to achieve uniform compounding and continuous extrusion of the fibers, thereby obtaining antibacterial polyoxymethylene / ultra-high molecular weight polyethylene bicomponent composite fibers; (a4) The spun fibers are stretched and heat-set to improve the mechanical properties and dimensional stability of the fibers.

[0096] In step (b), the preparation of the optical fiber sensing fiber includes: (b1) Selecting an inner core optical fiber 607 with a diameter of 9.2 µm and using a single-mode optical fiber with a wavelength of 1310 nm and a relatively low attenuation coefficient; (b2) preparing a polytetrafluoroethylene sheath layer 606; using an extrusion molding process, adding a polytetrafluoroethylene raw material into an extruder; gradually increasing the temperature from 200° C. from the feed section to the discharge section, and the screw speed is 80 rpm, so that the polytetrafluoroethylene material is uniformly extruded and tightly wrapped on the inner core of the optical fiber, thereby preparing a polytetrafluoroethylene sheath layer 606; (b3) Preparation of a stainless steel alloy wire braided protective layer 605: Select a suitable stainless steel alloy wire material for wire drawing so that the diameter of the alloy wire is 0.01 mm; Use a braiding machine to perform the braiding operation, set the braiding angle to 60°, and set the braiding density to 80 wires per square centimeter according to the protection requirements; Braid the stainless steel alloy wire outside the polytetrafluoroethylene sheath layer 606 according to the set parameters to form a stainless steel alloy wire braided protective layer 605; The stainless steel alloy wire braided protective layer 605 is 17-4PH martensitic stainless steel.

[0097] (b4) preparing the polytetrafluoroethylene encapsulation layer 604: the temperature is controlled at 250° C., and the pressure is adjusted according to the tube diameter and the extrusion speed to ensure that the polytetrafluoroethylene encapsulation layer is tight, uniform and free of defects; (b5) Wrap the inner core optical fiber 607 with a polytetrafluoroethylene sheath layer; wrap the stainless steel alloy wire braided protective layer 605 with the polytetrafluoroethylene sheath layer 606; and wrap the polytetrafluoroethylene encapsulation layer 604 with the stainless steel alloy wire braided protective layer 605.

[0098] In step (c), the first sensing fiber 601 is a polysulfone-based sensing fiber, and the second sensing fiber 602 is composed of a single-mode distributed optical fiber 607, a polytetrafluoroethylene sheath layer 606, a stainless steel alloy wire braided protective layer 605 and a polytetrafluoroethylene encapsulation layer 604. Example 5

[0099] The difference between Example 5 and Example 4 is that: a method for preparing a sensor function network system for marine environment integration of the present invention comprises the following steps: Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fibers: (a1) Raw material preparation: Outer layer material: ultrafine polyoxymethylene powder is mixed with dimethyl sulfoxide (DMSO) solvent to form a solution; hexamethyleneguanidine hydrochloride antibacterial powder is added to the solution and dispersed with the assistance of ultrasound; the solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the outer layer material; Core layer material: Choose materials with excellent mechanical properties, ultra-high molecular weight polyethylene chips UHMWPE; Ultrafine polyformaldehyde powder is mixed with dimethyl sulfoxide (DMSO) solvent to form a solution; hexamethyleneguanidine hydrochloride antibacterial powder is added to the solution and dispersed with the assistance of ultrasound; the solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain the antibacterial polyformaldehyde blend surface of the outer layer material; for the outer layer material part, the outer layer material includes polyformaldehyde and hexamethyleneguanidine hydrochloride, the temperature of the area near the feed port is 170°C, and the temperature of the subsequent area gradually increases, and the temperature of the area near the extruder head is 190°C; the outer layer of the antibacterial polyformaldehyde / ultra-high molecular polyethylene two-component composite fiber is obtained by mixing, heating and extruding in a screw machine; the average molecular weight of polyformaldehyde POM is 100,000, and the melt index is 9g / 10min; the average molecular weight of ultra-high molecular polyethylene is 1 million.

[0100] (a11) cooling the polyoxymethylene spinning chips to below -196°C with liquid nitrogen, slowly adding them into a reaction vessel containing a solvent of dimethyl sulfoxide (DMSO), wherein the weight ratio of the polyoxymethylene spinning chips to the solvent of dimethyl sulfoxide (DMSO) is 1:8, stirring at 150°C in a closed environment for 1.5 hours to uniformly disperse the chips to form a solution; (a12) the solid antibacterial powder of hexamethyleneguanidine hydrochloride accounts for 30% of the total mass of the solid antibacterial powder of hexamethyleneguanidine hydrochloride and the polyoxymethylene spinning chips, and the hexamethyleneguanidine hydrochloride PHMG is slowly added into dimethyl sulfoxide DMSO, and the antibacterial agent is prevented from agglomerating under slow stirring; (a13) Then, ultrasonic assisted dispersion is used, the ultrasonic frequency is set to 40 kHz power, and the ultrasonic treatment time is 30 minutes to ensure that the antibacterial agent is evenly dispersed in the ultra-high molecular weight polyethylene solution; (a14) The solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the dry outer layer material.

[0101] (a2) Melt preparation: Outer layer melt: The outer layer material antibacterial polyoxymethylene slices are prepared into a melt by melting. Premixing and melting can be performed in a twin-screw extruder to ensure uniform dispersion of the material; Core layer melt: The core layer material ultra-high molecular weight polyethylene chips UHMWPE are prepared into a melt by melting, and are also pre-mixed and melted in a twin-screw extruder to ensure that the material is evenly dispersed; (a3) Twin-screw spinning: Use a two-component spinning device for spinning, wherein the mass ratio of the antibacterial polyoxymethylene chips of the outer layer material to the ultra-high molecular weight polyethylene chips is 100:20-100:30; control the parameters in the spinning process to achieve uniform compounding and continuous extrusion of the fibers; use a two-component spinning device for spinning, wherein the mass ratio of the antibacterial polyoxymethylene chips of the outer layer material to the ultra-high molecular weight polyethylene chips of the core layer is 100:20; for the ultra-high molecular weight polyethylene part, the barrel temperature must be higher than its melting point and ensure that the melt has good fluidity; the temperature near the feed port can be 190°C, the temperature in the middle area is 220°C, and the temperature near the extruder head is 230°C; the mold temperature is 200°C, and the spinneret temperature is 260°C to ensure continuous extrusion of the fibers.

[0102] (a4) Fiber curing: Air curing: After the fiber is extruded from the spinneret, it naturally cures in the air. The temperature and humidity in the air will affect the curing speed and performance of the fiber; Cooling: Use cooling device to accelerate the solidification process of fiber and ensure the stability and uniformity of fiber; (a5) Fiber molding: Drafting: Drafting the spun fibers to improve their orientation and mechanical properties. The drafting multiple is usually between 2-5 times. Heat setting: The dimensional stability and mechanical properties of the fiber are improved through heat setting treatment. The heat setting temperature is usually 100-150°C and the time is 1-5 minutes to produce antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fibers.

[0103] In step (b), the preparation of the optical fiber sensing fiber includes: (b1) Select an inner core optical fiber with a diameter of 9.8µm, and use a single-mode optical fiber with a wavelength of 1310nm, an attenuation coefficient of 0.36dB / km, and a dispersion coefficient of 0-3.5ps / nm·km; (b2) preparing a polytetrafluoroethylene sheath layer; using an extrusion molding process, adding a polytetrafluoroethylene raw material into an extruder; gradually increasing the temperature from 350° C. from the feed section to the discharge section, and the screw speed is 20 rpm, so that the polytetrafluoroethylene material is uniformly extruded and tightly wrapped on the inner core of the optical fiber, thereby preparing a polytetrafluoroethylene sheath layer; (b3) Preparing a stainless steel alloy wire braided protective layer: selecting suitable stainless steel alloy wire material for wire drawing processing so that the diameter of the alloy wire is 0.05 mm; using a braiding machine for braiding operation, setting a braiding angle of 30°, and setting a braiding density of 10 wires per square centimeter according to protection requirements; braiding the stainless steel alloy wire outside the polytetrafluoroethylene sheath layer according to the set parameters to form a stainless steel alloy wire braided protective layer; the stainless steel alloy wire braided protective layer includes a combination of 17-4PH martensitic stainless steel, 2Cr13 martensitic stainless steel and 0Cr17Ni4Cu4Nb austenitic stainless steel.

[0104] (b4) Preparation of polytetrafluoroethylene encapsulation layer: the temperature is controlled at 320°C, and the pressure is adjusted according to the tube diameter and extrusion speed to ensure that the polytetrafluoroethylene encapsulation layer is tight, uniform and free of defects; In step (c), the first sensing fiber 601 is a carbon nano-based optical fiber sensing fiber. Example 6

[0105] The difference between Example 6 and Example 4 is that: a method for preparing a sensor function network system for marine environment integration of the present invention comprises the following steps: Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fibers: (a1) Ultrafine polyoxymethylene powder is mixed with dimethyl sulfoxide (DMSO) solvent to form a solution; hexamethyleneguanidine hydrochloride antibacterial powder is added to the solution and dispersed by ultrasound; the solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain the antibacterial polyoxymethylene blend surface of the outer layer material; for the outer layer material part, the outer layer material includes polyoxymethylene and hexamethyleneguanidine hydrochloride, the temperature of the area near the feed port is 175°C, and the temperature of the subsequent area gradually increases, and the temperature of the area near the extruder head is 210°C; the outer layer of the antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber is obtained by mixing, heating and extruding in a screw machine; the average molecular weight of polyoxymethylene (POM) is 300,000, and the melt index is 5g / 10min; the average molecular weight of ultra-high molecular weight polyethylene is 9 million.

[0106] (a11) cooling the polyoxymethylene spinning chips to below -196°C with liquid nitrogen, slowly adding them into a reaction vessel containing a solvent of dimethyl sulfoxide (DMSO), wherein the weight ratio of the polyoxymethylene spinning chips to the solvent of dimethyl sulfoxide (DMSO) is 1:10, stirring at 100°C in a closed environment for 5 hours to uniformly disperse the chips to form a solution; (a12) the solid antibacterial powder of hexamethyleneguanidine hydrochloride accounts for 40% of the total mass of the solid antibacterial powder of hexamethyleneguanidine hydrochloride and the polyoxymethylene spinning chips, and the hexamethyleneguanidine hydrochloride PHMG is slowly added into dimethyl sulfoxide DMSO, and the antibacterial agent is prevented from agglomerating under slow stirring; (a13) Then, ultrasonic assisted dispersion is used, the ultrasonic frequency is set to 20 kHz power, and the ultrasonic treatment time is 20 minutes to ensure that the antibacterial agent is evenly dispersed in the polyoxymethylene solution; (a14) The solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the dry outer layer material.

[0107] (a2) Spinning is performed using a two-component spinning device, wherein the mass ratio of the antibacterial polyoxymethylene of the outer layer material to the ultra-high molecular weight polyethylene is 100:30; for the ultra-high molecular weight polyethylene portion, the barrel temperature must be higher than its melting point and ensure that the melt has good fluidity; the temperature of the area near the feed port can be 200°C, the temperature of the middle area is 240°C, and the temperature of the area near the extruder head is 240°C; the mold temperature is 190°C, and the spinneret temperature is 230°C to ensure continuous extrusion of the fiber.

[0108] (a3) controlling the temperature parameters, pressure parameters and speed parameters during the spinning process to achieve uniform compounding and continuous extrusion of the fibers, thereby obtaining antibacterial polyoxymethylene / ultra-high molecular weight polyethylene bicomponent composite fibers; (a4) The spun fibers are stretched and heat-set to improve the mechanical properties and dimensional stability of the fibers.

[0109] In step (b), the preparation of the optical fiber sensing fiber includes: (b1) Select an inner core optical fiber with a diameter of 8.5µm, and use a single-mode optical fiber with an attenuation coefficient of ≤1.0dB / km, a wavelength of 1550nm, and a dispersion coefficient of 20ps / nm·km; (b2) preparing a polytetrafluoroethylene sheath layer; using an extrusion molding process, adding a polytetrafluoroethylene raw material into an extruder; gradually increasing the temperature from 250° C. from the feed section to the discharge section, and the screw speed is 120 rpm, so that the polytetrafluoroethylene material is uniformly extruded and tightly wrapped on the inner core of the optical fiber, thereby preparing a polytetrafluoroethylene sheath layer; (b3) Preparation of a stainless steel alloy wire braided protective layer: Select suitable stainless steel alloy wire material for wire drawing so that the diameter of the alloy wire is 0.04 mm; Use a braiding machine to perform the braiding operation, set a braiding angle of 50°, and set a braiding density of 70 wires per square centimeter based on the protection requirements; Braid the stainless steel alloy wire outside the polytetrafluoroethylene sheath layer according to the set parameters to form a stainless steel alloy wire braided protective layer; The stainless steel alloy wire braided protective layer is 2Cr13 martensitic stainless steel.

[0110] (b4) Preparation of polytetrafluoroethylene encapsulation layer: the temperature is controlled at 270°C, and the pressure is adjusted according to the tube diameter and extrusion speed to ensure that the polytetrafluoroethylene encapsulation layer is tight, uniform and free of defects; In step (c), the first sensing fiber 601 is a carbon fiber-based optical fiber sensing fiber. Example 7

[0111] The difference between Example 7 and Example 4 is that: a method for preparing a sensor function network system for marine environment integration of the present invention comprises the following steps: in step (c), the first sensor fiber 601 is a basalt-based sensor fiber.

[0112] Basalt fiber-based sensing fibers are converted into sensing fibers through integrated sensors, and after being integrated with the mesh, they play a significant role in marine environmental monitoring. In marine structures, they are sensitive to stress and strain. On offshore drilling platforms and submarine pipelines, they can not only keenly sense the deformation caused by waves, currents and geological activities, but also quickly feedback the health status of the structure to prevent accidents. In marine water quality monitoring, multiple parameters such as temperature, pressure, and salinity can be measured in real time. Temperature can reflect the direction of ocean heat exchange and ocean currents. Pressure is related to ocean depth, biological living environment and engineering facilities. Salinity is important for marine ecological material circulation, pH value can warn of acidification, dissolved oxygen is related to biological respiration and survival, and turbidity reflects water pollution and clarity. These functions enable basalt sensor fiber meshes to help study various changes in marine scientific research, locate pollution sources and diffusion in environmental protection, and help manage them. In resource development, they can evaluate the geological stability of mining and the suitability of the breeding environment, effectively improve development efficiency and safety, and promote the sustainable development of the marine industry.

[0113] Basalt fiber-based sensing fibers also provide additional mechanical strength. In the marine environment, optical fiber sensing fibers may be subject to external forces such as water flow impact and collision with marine organisms. The basalt fiber-based sensing fiber braided layer can effectively protect the optical fiber and polytetrafluoroethylene wrapping layer to prevent them from being damaged. Tensile resistance: Basalt fiber-based sensing fibers have high tensile strength and can withstand a certain amount of tension. This makes the optical fiber sensing fiber less likely to be broken during installation and use, improving its reliability and durability.

[0114] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and the scope of protection of the present invention is defined by the attached claims, description and their equivalents.

Claims

1. A sensor function network system for marine environment integration, characterized by: The sensor function network system for marine environment integration comprises a control center (1), a floating body (2), a stainless steel anchor cable (3), a cement positioning anchor block (4), a liftable fence door (5) and a sensor function network (6), wherein the floating body (2) is evenly distributed above the sensor function network (6), the stainless steel anchor cable (3) is connected to the floating body (2) and the cement positioning anchor block (4), the cement positioning anchor block (4) (4) is arranged on the seabed to match the stainless steel anchor cable (3), and the liftable fence door (5) is arranged on one side or multiple sides of the sensor function network (6).

2. The sensor function network system for marine environment integration according to claim 1 is characterized in that: The sensing function network (6) is composed of an antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber, a first sensing fiber and a second sensing fiber; the first sensing fiber is any one of a basalt fiber-based sensing fiber, a carbon fiber-based sensing fiber, a carbon nano-based sensing fiber, and a sulfone-based sensing fiber that can monitor a variety of marine parameters such as temperature, pressure, water quality, and biological activity; the second sensing fiber is composed of a single-mode distributed optical fiber whose inner core can test temperature and displacement parameters, a polytetrafluoroethylene sheath layer, a stainless steel alloy wire braided protective layer, and a polytetrafluoroethylene encapsulation layer.

3. A method for preparing a sensor function network system for marine environment integration, characterized in that The steps include: (a) Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene bicomponent composite fibers; (b) Preparation of optical fiber sensing fibers; (c) Weaving a mesh, weaving the antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber and the single-mode distributed optical fiber sensing fiber together to form a mesh structure; the optical fiber sensing fiber consists of a first sensing fiber and a second sensing fiber, and the first sensing fiber and the second sensing fiber are respectively inserted into the mesh column in a straight line by a weft inserting method to obtain a sensing functional network system for marine environment integration.

4. The method for preparing the sensor function network system for marine environment integration according to claim 3 is characterized in that: In step (a), Preparation of antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber: the antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fiber is a composite fiber with a skin-core structure, wherein the core layer is composed of ultra-high molecular weight polyethylene UHMWPE; the outer layer is coated with a blend of hexamethyleneguanidine hydrochloride and polyoxymethylene, namely, the antibacterial polyoxymethylene slice; (a1) Raw material preparation: Outer layer material: ultrafine polyoxymethylene powder is mixed with dimethyl sulfoxide (DMSO) solvent to form a solution; hexamethyleneguanidine hydrochloride antibacterial powder is added to the solution and dispersed with the assistance of ultrasound; the solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the outer layer material; Core layer material: Choose materials with excellent mechanical properties, ultra-high molecular weight polyethylene chips UHMWPE; (a2) Melt preparation: Outer layer melt: The outer layer material antibacterial polyoxymethylene slices are prepared into a melt by melting, which can be premixed and melted in a twin-screw extruder to ensure uniform dispersion of the material; Core layer melt: The core layer material ultra-high molecular weight polyethylene chips UHMWPE are prepared into a melt by melting, and are also pre-mixed and melted in a twin-screw extruder to ensure that the material is evenly dispersed; (a3) Twin-screw spinning: using a two-component spinning device for spinning, wherein the mass ratio of the antibacterial polyoxymethylene chips and the ultra-high molecular weight polyethylene chips (UHMWPE) of the outer layer material is 100:20-100:30; controlling the parameters during the spinning process to achieve uniform composite and continuous extrusion of the fibers; (a4) Fiber curing: Air curing: After the fiber is extruded from the spinneret, it naturally cures in the air. The temperature and humidity in the air will affect the curing speed and performance of the fiber. Cooling: Use cooling device to accelerate the solidification process of fiber and ensure the stability and uniformity of fiber; (a5) Fiber molding: Drafting: Drafting the spun fibers to improve their orientation and mechanical properties. The drafting multiple is usually between 2-5 times. Heat setting: The dimensional stability and mechanical properties of the fiber are improved through heat setting treatment. The heat setting temperature is usually 100-150°C and the time is 1-5 minutes to produce antibacterial polyoxymethylene / ultra-high molecular weight polyethylene two-component composite fibers.

5. The method for preparing the sensor function network system for marine environment integration according to claim 4 is characterized in that: In step (a1), antimicrobial polyoxymethylene slices are prepared: (a11) cooling the polyoxymethylene spinning chips to below -196°C with liquid nitrogen, slowly adding them into a reaction vessel containing a solvent of dimethyl sulfoxide (DMSO), wherein the weight ratio of the polyoxymethylene spinning chips to the solvent of dimethyl sulfoxide (DMSO) is 1:4-10, stirring at a temperature of 100-150°C in a closed environment for 1.5-6 hours to uniformly disperse the chips to form a solution; (a12) the solid antibacterial powder of hexamethyleneguanidine hydrochloride accounts for 10% to 40% of the total mass of the solid antibacterial powder of hexamethyleneguanidine hydrochloride and the polyoxymethylene spinning chips, and the hexamethyleneguanidine hydrochloride PHMG is slowly added to dimethyl sulfoxide DMSO, and the antibacterial agent is prevented from agglomerating under slow stirring; (a13) Then, ultrasonic assisted dispersion is used, the ultrasonic frequency is set to 20-40 kHz power, and the ultrasonic treatment time is 10-30 minutes to ensure that the antibacterial agent is evenly dispersed in the polyoxymethylene solution; (a14) The solvent is removed by heating evaporation or reduced pressure distillation, and then solidified and sliced ​​to obtain antibacterial polyoxymethylene slices of the dry outer layer material.

6. The method for preparing the sensor function network system for marine environment integration according to claim 4 is characterized in that: In step (a1), for the outer layer material part, the outer layer material includes polyoxymethylene and hexamethyleneguanidine hydrochloride, the temperature of the area near the feed port is 170-180°C, the temperature of the subsequent area gradually increases, and the temperature of the area near the extruder head is 190-210°C; the outer layer of the antibacterial ultra-high molecular polyethylene is formed by mixing, heating and extruding in a screw machine; the average molecular weight of polyoxymethylene POM is 100,000-300,000, and the melt index is 5-12g / 10min; the average molecular weight of ultra-high molecular polyethylene is 1 million-10 million; In step (a2), for the ultra-high molecular weight polyethylene part, the barrel temperature must be higher than its melting point and ensure that the melt has good fluidity; the temperature near the feed port can be 180-200°C, the temperature in the middle area is 220-240°C, and the temperature near the extruder head is 230-250°C; the mold temperature is 190-220°C, and the spinneret temperature is 230-260°C to ensure continuous extrusion of the fiber.

7. The method for preparing the sensor function network system for marine environment integration according to claim 4 is characterized in that: In step (a3), temperature: the spinning temperature is adjusted according to the melting point and flow characteristics of the material to ensure that the material maintains appropriate fluidity during the spinning process. Generally, the melting temperatures of the skin layer and the core layer are 180-220°C and 200-260°C respectively; Screw speed: Adjust the screw speed to ensure uniform mixing and stable conveying of the two materials in the screw. Usually the screw speed is between 100-300 rpm; Pressure: Adjust the spinning pressure to ensure that the two materials are evenly mixed and extruded at the spinneret. The pressure is usually 10-50MPa. Spinning speed: Control the spinning speed to ensure the uniformity and continuity of the fiber. Usually the spinning speed is 100-500 m / min.

8. The method for preparing the sensor function network system for marine environment integration according to claim 3 is characterized in that: In step (b), the preparation of the optical fiber sensing fiber includes: (b1) The inner core diameter is 4-10µm, the attenuation coefficient is relatively low, the temperature and displacement parameters can be tested, and the wavelength is 1310nm or 1550nm single-mode distributed optical fiber; (b2) preparing a polytetrafluoroethylene sheath layer; using an extrusion molding process, adding a polytetrafluoroethylene raw material into an extruder; gradually increasing the temperature from 200°C to 350°C from the feed section to the discharge section, and the screw speed is 20-120 rpm, so that the polytetrafluoroethylene material is uniformly extruded and tightly wrapped on the inner core of the optical fiber, thereby preparing a polytetrafluoroethylene sheath layer; (b3) Preparing a stainless steel alloy wire braided protective layer: selecting a suitable stainless steel alloy wire material for wire drawing so that the diameter of the alloy wire is 0.01-0.05 mm; using a braiding machine for braiding operation, setting a braiding angle of 30°-60°, and setting a braiding density of 10-80 wires per square centimeter according to the protection requirements; braiding the stainless steel alloy wire outside the polytetrafluoroethylene sheath layer according to the set parameters to form a stainless steel alloy wire braided protective layer; (b4) Preparation of polytetrafluoroethylene encapsulation layer: the temperature is controlled at 250-320°C, and the pressure is adjusted according to the tube diameter and extrusion speed to ensure that the polytetrafluoroethylene encapsulation layer is tight, uniform and free of defects; (b5) Wrapping the inner core optical fiber with a polytetrafluoroethylene sheath layer; wrapping the polytetrafluoroethylene sheath layer with a stainless steel alloy wire braided protective layer; and wrapping the polytetrafluoroethylene encapsulation layer with a stainless steel alloy wire braided protective layer.

9. The method for preparing a sensor function network system for marine environment integration according to claim 3, characterized in that: In step (b3), the stainless steel alloy wire braided protective layer includes 17-4PH martensitic stainless steel, 2Cr13 martensitic stainless steel or 0Cr 17 One or a combination of Ni4Cu4Nb austenitic stainless steel.

10. The method for preparing a sensor function network system for marine environment integration according to claim 3, characterized in that: In step (c), the first sensing fiber is any one of a basalt fiber-based sensing fiber, a carbon fiber-based sensing fiber, a carbon nano-based sensing fiber, and a sulfone-based sensing fiber, and the second sensing fiber is composed of an inner core single-mode optical fiber, a polytetrafluoroethylene sheath layer, a stainless steel alloy wire braided protective layer, and a polytetrafluoroethylene encapsulation layer.

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