Armoured composite optical fibre array material and method of processing the same

By employing fiber braiding and armored composite structures with sub-fiber rods of various shapes in the fiber array, the problems of uneven stress and deformation of optical fibers under complex environments are solved, thereby improving the integrity and sensing accuracy of the multi-fiber array.

CN120669368BActive Publication Date: 2026-02-24ANHUI LUAN ROAD & BRIDGE ENG TECH CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202510401831.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-04-01
Publication Date
2026-02-24
Estimated Expiration
2045-04-01

AI Technical Summary

Technical Problem

When multiple optical fibers are placed in the same reinforcing bar for sensing and measurement, existing technologies suffer from problems such as fiber slippage, uneven deformation, and uneven loss, which cannot meet the sensing requirements in complex environments.

Method used

A fiber array bundle is formed by braiding sub-fiber rods of various shapes and then encapsulating them with fiber layers and polymer adhesives to form an armored composite structure, ensuring that the fiber is subjected to uniform stress, deformation, and loss in complex environments without relative slippage.

Benefits of technology

It achieves the integrity, coordination, sensing accuracy and durability of multi-fiber arrays under complex stress environments, and improves the service life and sensing accuracy of optical fibers.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120669368B_ABST
    Figure CN120669368B_ABST
Patent Text Reader

Abstract

The present application belongs to the armored array optical fiber composite tendon material technical field in the direction of measurement technology, and particularly relates to an armored composite optical fiber array material, which comprises optical fibers and fiber rods, the optical fibers are arranged in the fiber rods to form sub-fiber rod optical fibers, and the multiple sub-fiber rod optical fibers are braided together to form an optical fiber array bundle, which overcomes the shortcomings of the prior art, fills the blank of putting multiple optical fibers in the same tendon for sensing measurement, develops a multiple optical fiber array structure based on experimental data science, makes the space stress, deformation, loss and relative slip of each sub-optical fiber uniform, ensures the integrity, coordination, sensing accuracy, repeatability and durability of the multiple optical fiber array under a complex stress environment, and meanwhile, the optical fiber array developed in the present application can withstand the overall coupling processing technology of the armored outer layer and form a coordinated whole again, thereby becoming a new type of sensing material with multiple functions for measurement.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This invention belongs to the technical field of armored array fiber composite reinforcement materials in the field of measurement technology, and specifically relates to an armored composite fiber array material and its processing method. Background Technology

[0002] As a sensing element, optical fiber uses optical physical principles such as refraction and scattering for sensing and measurement. In various environments, the optical fiber must not be interrupted during measurement, nor should it cause significant loss or attenuation of the transmitted light signal. Simultaneously, it must ensure stable signal transmission under different conditions. Many scholars both domestically and internationally have applied optical fiber sensing technology to monitor the stress and strain of steel strands. Existing technology involves placing a single or dual optical fiber into fiber-reinforced resin to create a smart rib, which is then combined with the steel strand to develop a smart steel strand. This smart steel strand can achieve high-precision monitoring of local stress and strain at the measured points, which is of great significance. However, existing smart steel strands have not addressed issues such as local damage and signal attenuation caused by stress transmission to the fiber rod and optical fiber under different rib locations, local stress concentration, bending, and fatigue fretting corrosion. With the increase in the number of coupled optical fibers, simple uniform distribution or central stacking of fibers is no longer feasible. It is necessary to analyze and calculate the microstructure and scientifically design a multi-layered structure to fundamentally overcome the effects of these problems.

[0003] With the development of fiber optic technology, the current method of placing a single or dual fiber optic cable within the same reinforcing bar is no longer sufficient to meet practical needs. Multiple fibers need to be placed within the same reinforcing bar for sensing and measurement. Existing technologies use single or dual fiber optic cable placement for multiple fibers, but this introduces several technical problems, including but not limited to: slippage between fibers under shear stress, inconsistent deformation of fibers, uneven stress in the fiber space, uneven deformation of multiple fibers, and uneven loss of multiple fibers. Therefore, simply stacking fibers to a center point or simply distributing them evenly using single or dual fiber optic cable placement cannot solve the practical arrangement and construction problems. It is necessary to comprehensively consider factors such as fiber rod diameter and volume, and develop a scientific fiber optic array structure based on experimental data to ensure uniform stress, deformation, loss, and relative slippage among the sub-fibers.

[0004] Simulation calculation analysis

[0005] Use Rhino to draw the 3D geometric model of the smart tendon, such as Figure 19As shown, the tension of the reinforcing bar is 240 mm, the diameter of the central fiber rod is 7.2 mm, and six steel wires with a diameter of 4 mm are evenly distributed around it. The ABAQUS finite element software was used for calculation, and the three-dimensional geometric model was imported into ABAQUS to obtain the calculation model. In the numerical calculation process, both the inner carbon rod and the outer steel wire were considered as homogeneous solid materials. In addition to the intelligent reinforcing bar, models of the internal optical fibers and external loads of the fiber rod were established in ABAQUS, such as... Figure 20 As shown.

[0006] In ABAQUS, contact types are mainly divided into two categories: General Contact and Surface-to-Surface Contact. General Contact is suitable for complex 3D models or scenarios involving multi-body interactions, supports automatic detection of contact pairs, and allows self-contact; while Surface-to-Surface Contact requires manual definition of the master and slave surfaces. Surface-to-Surface Contact is selected for the numerical simulation of displacement between external loads and intelligent reinforcing bars, with the outer surface of the load as the master surface and the outer surface of the six steel wires of the intelligent reinforcing bars as the slave surface; to ensure that the fiber rods can be calculated normally under load, the outer surface of the fiber rods is set as the master surface and the outer surface of the steel wires as the slave surface, thus setting up Surface-to-Surface Contact.

[0007] During the simulation, a negative Y-axis gravity load was applied to the entire model, while the two ends of the smart stiffener were completely fixed. A displacement of 5 mm was applied along the negative Y-axis to the applied load. By changing the distribution distance of the optical fibers inside the fiber rod, the effect of different spacing on the stress of the optical fibers under the same external load was studied.

[0008] (1) Small fiber optic spacing

[0009] Figure 21 The modeling cross-section, stress cloud diagram, and side-view stress-deformation cloud diagram of the intelligent reinforcing bar with small fiber spacing are shown in the left figure. The three circles marked on the left represent three optical fibers arranged in an equilateral triangle, 1 mm away from the center point. Simulation calculations show that the stresses at the locations of the three optical fibers are 236 MPa, 300 MPa, and 702 MPa, respectively, and the reinforcing bar exhibits a certain degree of angular deformation. The stress at the location of fiber number 3 is relatively high. If the fiber is subjected to 702 MPa cyclic stress for a long period, its internal micro-defects, such as surface scratches and coating defects, will accelerate their propagation, eventually leading to brittle fracture. Fiber breakage will directly damage the integrity of the sensing network, causing distortion or interruption of strain monitoring signals, severely affecting the structural health diagnosis function of the intelligent reinforcing bar.

[0010] (2) Large fiber optic spacing

[0011] Figure 22The modeling cross-section and simulated stress cloud diagram of the intelligent reinforcing fiber rod with a large fiber distribution are shown in the left figure. The three circles marked represent three optical fibers arranged in an equilateral triangle, 1.75 mm from the center point. Simulation calculations show that the stresses at the locations of the three optical fibers are 300 MPa, 300 MPa, and 702 MPa, respectively. The reinforcing carbon fiber core exhibits a significant bending deformation angle. While the larger fiber spacing (1.75 mm) reduces stress concentration, it weakens the lateral constraint force of the matrix on the fibers. During bending deformation, the fibers are more prone to displacement along the direction of lower constraint. The symmetry of the equilateral triangle arrangement is disrupted during deformation, leading to a shift in the local load transfer path. Fiber slippage changes their initial arrangement position, causing strain monitoring signal drift or even failure. Simultaneously, slip friction accelerates interface wear and fiber breakage.

[0012] Analysis of test data under high stress conditions with small radius bending angles

[0013] Currently, the only research and experimental data available worldwide regarding fiber loss under single operating conditions such as bending angle or micro-stress are on the following:

[0014] Experimental observation of critical bending radius

[0015] a. Range of bending radii that are significantly affected

[0016] 1. High-sensitivity system (spatial resolution ≤ 1m)

[0017] R < 10 cm: Frequency shift changes exceeding system noise (typical noise level 1–5 MHz) can be detected.

[0018] R < 5 cm: Significant frequency shift (> 10 MHz), easily misjudged as strain or temperature event.

[0019] 2. Low-sensitivity systems (spatial resolution > 5 m)

[0020] R<3cm: Frequency shift changes may be averaged, but may still be identified as local anomalies.

[0021] Experimental data reference

[0022]

[0023] It has been demonstrated that bending or stress has a significant impact on the sensing of optical fibers, but no data literature on complex stress states under bending conditions has been found.

[0024] In response, we conducted relevant experimental research and analysis:

[0025] 1. Experimental Research Background: Two spatially symmetrical optical fibers were set up and coupled into the reinforcing rib structure. Spectral data were collected and analyzed at several stress stages, from 20% / 40% / 60% / 70% of the reinforcing rib's breaking strength to complete failure. Then, the spectral signal data was processed by an algorithm to identify the morphological curves and patterns.

[0026] Set two starting points with angles ranging from 5° to 10°, repeat the above mechanical loading test, and collect and analyze the data again.

[0027] The test data are as follows Figure 23 The data shows that although optical fibers have stress loss in a straight state, their mechanical linearity and symmetry are very good, which is consistent with existing calculation models and laws, and is consistent with the laws in international literature.

[0028] from Figure 24 Data shows that fiber optic sensing is significantly affected by bending and complex stress conditions:

[0029] 1. Under the combined effects of bending and stress, optical transmission loss increases exponentially, necessitating power adjustment.

[0030] The optical fibers at different positions of the reinforcing bars are affected differently.

[0031] The deformation coordination and synchronization of optical fibers during bending are affected.

[0032] Spatial positioning is affected by hardware and bending angle plus stress.

[0033] Therefore, if multiple optical fibers need to be placed in the same reinforcing bar for sensing and measurement, the arrangement and structure of the fibers must be considered. Specifically, there must be sufficient fiber spacing between the sub-fibers to ensure strength, while also ensuring no slippage and synchronous deformation under shear stress. Simply stacking fibers to the center point or simply distributing them uniformly is insufficient. Considering factors such as fiber rod diameter and volume, a scientific optical fiber array structure based on experimental data is needed to ensure uniform spatial stress, uniform deformation, uniform loss, and no relative slippage among the sub-fibers. Summary of the Invention

[0034] The purpose of this invention is to provide an armored composite fiber array material and its processing method, which overcomes the shortcomings of the prior art and fills the gap in sensing and measurement by placing multiple optical fibers in the same stress bar. It develops a multi-fiber array structure based on experimental data science, which ensures that each sub-fiber is subjected to uniform spatial stress, deformation, and loss without relative slippage. This ensures the integrity, coordination, sensing accuracy, repeatability, and durability of the multi-fiber array under complex stress environments. At the same time, the fiber array developed in this application can withstand the overall coupling processing technology of the armored outer layer and re-form a coordinated whole, becoming a new type of sensing material for multi-functional measurement applications.

[0035] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0036] An armored composite fiber optic array material includes fiber rods made of carbon fiber, glass fiber, rock fiber, or polymer fiber. The optical fibers are disposed inside the fiber rods to form independent sub-fiber rod fibers. There are multiple sub-fiber rod fibers, with two or more fibers. These multiple sub-fiber rod fibers are braided together to form an optical fiber array bundle. The cross-section of the sub-fiber rod fibers can have various shapes. The optical fiber array bundle can be formed by braiding sub-fiber rod fibers with a single cross-sectional shape individually or by mixing sub-fiber rod fibers with multiple cross-sectional shapes. The cross-sectional shape of the sub-fiber rod fibers is selected based on the requirements for overall strength, slippage, loss, and frictional resistance of the optical fiber array.

[0037] Furthermore, various shapes are available, including wavy cross-sections, rectangular cross-sections, hexagonal cross-sections, circular cross-sections, or rhomboid cross-sections. A fiber array bundle with a wavy cross-section is a wavy fiber array bundle; a fiber array bundle with a rectangular cross-section is a square grid fiber array bundle; a fiber array bundle with a hexagonal cross-section is a honeycomb fiber array bundle; a fiber array bundle with a circular cross-section is a circular grid fiber array bundle; and a fiber array bundle with a rhomboid cross-section is a rhomboid grid fiber array bundle.

[0038] Furthermore, the fiber array bundle is wrapped and filled with fiber layers to form a first wrapping layer.

[0039] Furthermore, a second protective sleeve made of polymer adhesive is disposed outside the first encapsulation layer.

[0040] The practical application of fiber array bundles is mainly in fiber optic reinforcement. Multiple reinforcements are coupled and processed into a whole on the outside of the fiber array bundle. The fiber array bundle is wrapped in the middle by multiple reinforcements. The reinforcements and the fiber array bundle can be filled with or not filled with polymer adhesive for overall processing, and are woven into multi-fiber array reinforcements.

[0041] A method for processing armored composite fiber array materials, the specific steps of which are as follows:

[0042] Step 1: Sub-fiber rod fiber processing. After mixing the adhesive and fiber, the adhesive is wrapped around the outside of the fiber through a mold to process the fiber into a sub-fiber rod fiber with a wavy cross-section, a rectangular cross-section, a hexagonal cross-section, a circular cross-section, or a rhomboid cross-section.

[0043] Step 2: Fiber array is bundled together by braiding two or more sub-fiber rods together to form a fiber array bundle. The cross-section of the sub-fiber rod is selected based on the requirements for the overall strength, slip, loss, and frictional resistance of the fiber array. The cross-section of the sub-fiber rod inside the fiber array bundle can be a single cross-section shape or a mixture of sub-fiber rods with multiple cross-section shapes.

[0044] Step 3: First wrapping layer processing. The first wrapping layer is wrapped around the outside of the fiber array bundle using a mold. The first wrapping layer is composed of a mixture of adhesive and fiber.

[0045] Step 4: Processing the second protective sleeve. The second protective sleeve is wrapped around the outside of the first wrapping layer using a mold. The second protective sleeve is made of a polymer adhesive.

[0046] Furthermore, in step two, when the errors in overall bending strength, relative slippage, synchronous deformation, loss, and frictional resistance are greater than 30% compared to those without fiber rods, fiber rods with wavy cross-sections are used to form wavy fiber array bundles.

[0047] Furthermore, in step two, when the errors in overall bending strength, relative slippage, synchronous deformation, loss, and frictional resistance are greater than 10% to 30% compared to those without fiber rods, fiber rods with rectangular, hexagonal, or rhomboid cross-sections are used to form square grid-like fiber array bundles, honeycomb-like fiber array bundles, or rhomboid grid-like fiber array bundles.

[0048] Furthermore, in step two, when the errors in overall strength, relative slip, synchronous deformation, loss, and frictional resistance are greater than 1% to 10% compared to those without fiber rods, fiber rods with circular cross-sections are used to form a circular mesh-like fiber array bundle.

[0049] Compared with the prior art, the present invention has the following advantages:

[0050] 1. It fills the gap in sensing and measurement by placing multiple optical fibers in the same stress bar, and develops a multi-fiber array structure based on experimental data science. This structure ensures that each sub-fiber is subjected to uniform spatial stress, deformation, and loss, and there is no relative slippage. This ensures the integrity, coordination, sensing accuracy, repeatability, and durability of the multi-fiber array under complex stress environments.

[0051] By forming a multi-layer armor around the optical fiber, consisting of a fiber rod made of carbon fiber, glass fiber, soil fiber, or polymer fiber, a first cladding layer, a second protective sleeve, and multiple reinforcing ribs, the optical fiber's ability to withstand bending and complex stress conditions can be better protected, thus improving its service life.

[0052] The fiber array developed in this application can withstand the overall coupling processing technology of the armored outer layer and re-form a coordinated whole, becoming a new type of sensing material for multi-functional measurement applications. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of the structure of a multi-fiber array intelligent steel strand.

[0054] Figure 2 A schematic diagram of a wavy fiber optic array bundle with a protective sleeve.

[0055] Figure 3 This is a schematic diagram of a wavy fiber array bundle.

[0056] Figure 4 This is a schematic diagram of a single sub-fiber rod optical fiber structure for a wavy optical fiber array bundle.

[0057] Figure 5 A schematic diagram of a square grid-shaped fiber optic array bundle with a protective sleeve.

[0058] Figure 6 This is a schematic diagram of a square grid-shaped fiber array bundle.

[0059] Figure 7 This is a schematic diagram of a single sub-fiber rod structure for a square grid-like fiber array bundle.

[0060] Figure 8 A schematic diagram of a honeycomb fiber optic array bundle with a protective sleeve.

[0061] Figure 9 This is a schematic diagram of a honeycomb fiber array bundle.

[0062] Figure 10 This is a schematic diagram of a single sub-fiber rod optical fiber structure in a honeycomb optical fiber array bundle.

[0063] Figure 11 A schematic diagram of a circular mesh-like fiber optic array bundle with a protective sleeve.

[0064] Figure 12 This is a schematic diagram of a circular grid-like fiber optic array bundle.

[0065] Figure 13 This is a schematic diagram of a single sub-fiber rod optical fiber structure for a circular grid-like optical fiber array bundle.

[0066] Figure 14 This is a schematic diagram of a diamond-shaped mesh fiber array bundle with a protective sleeve.

[0067] Figure 15 This is a schematic diagram of a diamond-shaped mesh fiber array bundle.

[0068] Figure 16 This is a schematic diagram of a single sub-fiber rod structure for a diamond-shaped mesh fiber array bundle.

[0069] Figure 17 This is a schematic diagram of a structure consisting of multiple shapes braided together with protective sleeves.

[0070] Figure 18 This is a schematic diagram of a structure in which multiple shapes are mixed and braided into a bundle.

[0071] Figure 19 To draw a 3D geometric model of the smart tendon using Rhino.

[0072] Figure 20 To create a model of the internal optical fiber and external load of a fiber rod in ABAQUS.

[0073] Figure 21 This study aims to model the cross-section, stress cloud diagram, and side-view stress-deformation cloud diagram of a smart tendon fiber rod with a small fiber distribution spacing.

[0074] Figure 22 Modeling cross-section and simulation stress cloud diagram of intelligent tendon fiber rod with large fiber distribution.

[0075] Figure 23 The force and spectrum of the optical fiber in a straight (without bending) state.

[0076] Figure 24 The stress and spectrum of the optical fiber under bending angle (bending device).

[0077] In the diagram: 1. Optical fiber; 2. Fiber rod; 3. Fiber array bundle; 4. First sheath; 5. Second protective sleeve; 6. Stiffener; 21. Sub-fiber rod optical fiber. Detailed Implementation

[0078] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0079] With the increasing demands for fiber optic measurement, it is necessary to acquire multiple measurement data within the same structure. For example, when measuring strain in a stress bar using fiber optics, it is necessary to simultaneously measure humidity, temperature, vibration, spatial attitude, etc. This requires multi-functional, multi-fiber collaborative real-time sensing, and it is also essential to ensure that the data comparison is meaningful only within the same stress unit. Therefore, multi-fiber armored array technology has been successfully developed and tested to meet this practical need. This invention, based on the distributable measurement characteristics of optical fibers, invents a structure that incorporates multiple optical fibers within the same stress bar for sensing and measurement. Considering the technical aspects of fiber arrangement and construction, namely, that there must be sufficient fiber spacing between sub-fibers to ensure strength, while also satisfying the requirements of non-slippage and synchronous deformation under shear stress. Taking into account factors such as fiber rod diameter and volume, a novel fiber array has been developed based on experimental data and scientific array construction, ensuring uniform spatial stress, uniform deformation, uniform loss, and no relative slippage in each sub-fiber.

[0080] Example 1

[0081] A new type of armored composite fiber array material has been developed, such as Figures 1-18 As shown, it includes an optical fiber 1 and a fiber rod 2 made of carbon fiber, glass fiber, rock and soil fiber or polymer fiber. The optical fiber 1 is set inside the fiber rod 2 to form an independent sub-fiber rod optical fiber 21. There are multiple sub-fiber rod optical fibers 21, and there are two or more sub-fiber rod optical fibers 21. The multiple sub-fiber rod optical fibers 21 are braided together to form an optical fiber array bundle 3.

[0082] Furthermore, the cross-section of the sub-fiber rod fiber can be of various shapes, and each shape of the sub-fiber rod fiber can be individually braided into a bundle or multiple shapes can be mixed and braided into a bundle.

[0083] Furthermore, various shapes are available, including wavy cross-sections, rectangular cross-sections, hexagonal cross-sections, circular cross-sections, or rhomboid cross-sections. A fiber array bundle with a wavy cross-section is a wavy fiber array bundle; a fiber array bundle with a rectangular cross-section is a square grid fiber array bundle; a fiber array bundle with a hexagonal cross-section is a honeycomb fiber array bundle; a fiber array bundle with a circular cross-section is a circular grid fiber array bundle; and a fiber array bundle with a rhomboid cross-section is a rhomboid grid fiber array bundle.

[0084] The fiber array bundle is wrapped and filled with fiber layers to form the first wrapping layer 4.

[0085] The first wrapping layer is surrounded by a second protective sleeve 5 made of polymer adhesive.

[0086] Example 2

[0087] The fiber array bundle 3 is mainly used on the fiber optic reinforcement. Multiple reinforcements 6 are set on the outside of the fiber array bundle and coupled into a whole. The fiber array bundle is wrapped in the middle by multiple reinforcements. The gaps between the multiple reinforcements and the fiber array bundle can be filled or not filled with polymer adhesive for overall processing, and then woven into a multi-fiber array reinforcement.

[0088] Example 3

[0089] The specific fabrication process of fiber optic arrays includes the following steps:

[0090] Step 1: Sub-fiber rod fiber processing. After mixing the adhesive and fiber, the adhesive is wrapped around the outside of the fiber through a mold to process the fiber into a sub-fiber rod fiber with a wavy cross-section, a rectangular cross-section, a hexagonal cross-section, a circular cross-section, or a rhomboid cross-section.

[0091] Step 2: Fiber array is bundled together by braiding two or more sub-fiber rods together to form a fiber array bundle. The cross-section of the sub-fiber rod is selected based on the requirements for the overall strength, slip, loss, and frictional resistance of the fiber array. The cross-section of the sub-fiber rod inside the fiber array bundle can be a single cross-section shape or a mixture of sub-fiber rods with multiple cross-section shapes.

[0092] Step 3: First wrapping layer processing. The first wrapping layer is wrapped around the outside of the fiber array bundle using a mold. The first wrapping layer is composed of a mixture of adhesive and fiber.

[0093] Step 4: Processing the second protective sleeve. The second protective sleeve is wrapped around the outside of the first wrapping layer using a mold. The second protective sleeve is made of a polymer adhesive.

[0094] In step two, when the errors in overall bending strength, relative slippage, synchronous deformation, loss, and frictional resistance are greater than 30% compared to those without fiber rods, fiber rods with wavy cross sections are used to form wavy fiber array bundles.

[0095] In step two, if the errors in overall bending strength, relative slippage, synchronous deformation, loss, and frictional resistance are greater than 10% to 30% compared to those without fiber rods, fiber rods with rectangular, hexagonal, or rhomboid cross-sections are used to form square grid-like fiber array bundles, honeycomb-like fiber array bundles, or rhomboid grid-like fiber array bundles.

[0096] In step two, when the errors in overall strength, relative slip, synchronous deformation, loss, and frictional resistance are greater than 1% to 10% compared to those without fiber rods, fiber rods with circular cross-sections are used to form a circular mesh-like fiber array bundle.

[0097] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An armored composite fiber array material, comprising optical fibers, characterized in that: The fiber array comprises fiber rods made of carbon fiber, glass fiber, geotextile fiber, or polymer fiber. The optical fibers are disposed inside the fiber rods to form independent sub-fiber rod fibers. There are multiple sub-fiber rod fibers, which are two or more in number. The multiple sub-fiber rod fibers are braided together to form an optical fiber array bundle. The cross-section of the sub-fiber rod fibers can be of various shapes. The optical fiber array bundle can be formed by braiding sub-fiber rod fibers with a single cross-section shape individually or by braiding a mixture of multiple cross-section shapes. The cross-section of the sub-fiber rod fibers is selected based on the requirements for the overall strength, slip, loss, and frictional resistance of the optical fiber array.

2. The armored composite fiber array material according to claim 1, characterized in that: The various shapes include wavy cross-sections, rectangular cross-sections, hexagonal cross-sections, circular cross-sections, or rhomboid cross-sections. A fiber array bundle with a wavy cross-section is a wavy fiber array bundle; a fiber array bundle with a rectangular cross-section is a square grid fiber array bundle; a fiber array bundle with a hexagonal cross-section is a honeycomb fiber array bundle; a fiber array bundle with a circular cross-section is a circular grid fiber array bundle; and a fiber array bundle with a rhomboid cross-section is a rhomboid grid fiber array bundle.

3. The armored composite fiber array material according to any one of claims 1 or 2, characterized in that: The fiber array bundle is wrapped and filled with fiber layers to form a first wrapping layer.

4. The armored composite fiber array material according to claim 3, characterized in that: A second protective sleeve made of polymer adhesive is provided outside the first wrapping layer.

5. The armored composite fiber array material according to any one of claims 1, 2, or 4, characterized in that: The fiber array bundle is applied to the fiber optic reinforcing ribs. Multiple reinforcing ribs are coupled and processed into a whole on the outside of the fiber array bundle. The fiber array bundle is wrapped in the middle by multiple reinforcing ribs. The positions between the multiple reinforcing ribs and the fiber array bundle are filled with polymer adhesive and processed into a multi-fiber array reinforcing rib, or it can be processed directly into a multi-fiber array reinforcing rib without filling.

6. A method for processing armored composite fiber optic array materials, characterized in that: The specific steps are as follows: Step 1: Sub-fiber rod fiber processing. After mixing the adhesive and fiber, the adhesive is wrapped around the outside of the fiber through a mold to process the fiber into a sub-fiber rod fiber with a wavy cross-section, a rectangular cross-section, a hexagonal cross-section, a circular cross-section, or a rhomboid cross-section. Step 2: Fiber array is bundled together by braiding two or more sub-fiber rods together to form a fiber array bundle. The cross-section of the sub-fiber rod is selected based on the requirements for the overall strength, slip, loss, and frictional resistance of the fiber array. The cross-section of the sub-fiber rod inside the fiber array bundle can be a single cross-section shape or a mixture of sub-fiber rods with multiple cross-section shapes. Step 3: First wrapping layer processing. A first wrapping layer is wrapped around the outside of the fiber array bundle using a mold. The first wrapping layer is composed of an adhesive and fiber mixture. Step 4: Processing the second protective sleeve. The second protective sleeve is wrapped around the outside of the first wrapping layer using a mold. The second protective sleeve is made of a polymer adhesive.

7. The method for processing armored composite fiber array materials according to claim 6, characterized in that: When the error in overall bending strength, relative slippage, synchronous deformation, loss, and frictional resistance in step two is greater than 30% compared to that without fiber rods, fiber rods with wavy cross sections are used to form wavy fiber array bundles.

8. The method for processing armored composite fiber array materials according to claim 6, characterized in that: When the error in overall bending strength, relative slippage, synchronous deformation, loss, and frictional resistance in step two is greater than 10% to 30% compared to that without fiber rods, fiber rods with rectangular, hexagonal, or rhomboid cross-sections are used to form square grid-like fiber array bundles, honeycomb-like fiber array bundles, or rhomboid grid-like fiber array bundles.

9. The method for processing armored composite fiber array materials according to claim 6, characterized in that: When the error in overall strength, relative slip, synchronous deformation, loss, and frictional resistance in step two is greater than 1% to 10% compared to the absence of fiber rods, fiber rods with circular cross-sections are used to form a circular mesh-like fiber array bundle.

Citation Information

Patent Citations

  • Intelligent carbon fiber ribs with internally implanted optical fibers and manufacturing method thereof

    CN112388990A

  • Stranded cable having optical fiber sensor

    KR1020090041268A