Long-gauge-length fiber grating carbon fiber intelligent rib anchoring structure based on micro-groove packaging
By using a long gauge length fiber grating carbon fiber smart reinforcement anchoring structure based on microgroove encapsulation, the problem of difficult replacement of fiber grating sensors is solved, realizing convenient sensor replacement and continuous strain monitoring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI UNIVERSITY OF TECHNOLOGY
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-08
AI Technical Summary
In existing technologies, fiber Bragg grating sensors are difficult to replace in carbon fiber smart ribs, leading to maintenance difficulties when damaged.
The fiber optic grating sensor is detachably encapsulated on the carbon fiber rib using a microgroove-based long gauge length fiber optic grating carbon fiber intelligent reinforcement anchoring structure. Through the design of detachable anchoring components and end caps, the fiber optic grating sensor can be detachably encapsulated on the carbon fiber rib, enabling the replacement of damaged sensors.
This enables convenient replacement of fiber optic grating sensors, improves the maintenance efficiency and reliability of carbon fiber smart ribs, and ensures the continuity of strain monitoring.
Smart Images
Figure CN224213129U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of carbon fiber smart reinforcement technology, and in particular to a long gauge-length fiber optic grating carbon fiber smart reinforcement anchoring structure based on microgroove encapsulation. Background Technology
[0002] In cable-stayed bridges, traditional steel cables suffer from corrosion and high weight. Carbon fiber cables, with their lightweight and corrosion resistance, are gradually replacing steel cables. During the production of carbon fiber cables, fiber optic grating sensors are embedded to create fiber optic grating carbon fiber smart tendons. These smart tendons can monitor the stress distribution of the cable in real time, thereby analyzing strain sensing patterns and performance losses.
[0003] In a fiber Bragg grating sensor, the grating is subjected to stress from the cable, causing strain. The fiber Bragg grating sensor senses the strain change, which causes a change in the center wavelength, and thus outputs the stress distribution of the cable.
[0004] The fiber Bragg grating sensor in carbon fiber smart ribs has various packaging technologies. The current mainstream manufacturing method is to implant the optical fiber in the carbon fiber rib production process in one go, and then form it as a whole through pultrusion winding and curing processes. However, this manufacturing method makes it difficult to replace the fiber Bragg grating sensor when it is damaged.
[0005] To facilitate the replacement of damaged fiber Bragg grating sensors in carbon fiber smart ribs, this application provides an anchoring structure for long gauge-length fiber Bragg grating carbon fiber smart ribs based on microgroove encapsulation. Utility Model Content
[0006] To overcome the problems existing in the related technologies, this application provides a long gauge length fiber optic grating carbon fiber smart rib anchoring structure based on microgroove encapsulation, including a first anchoring component, a second anchoring component, and an end cap.
[0007] The first anchoring component is provided with a first fixing ring and a first grating encapsulation groove, and the second anchoring component is provided with a second fixing ring and a second grating encapsulation groove;
[0008] The first fixing ring and the second fixing ring are sleeved on the carbon fiber reinforcement along the axial direction of the carbon fiber reinforcement and fixed thereon.
[0009] The first grating encapsulation slot and the second grating encapsulation slot are movably connected along the axial direction of the carbon fiber reinforcement. The first grating encapsulation slot and the second grating encapsulation slot are assembled to form a fiber grating receiving cavity. The fiber grating receiving cavity is used to inject adhesive for fiber grating encapsulation. The end cap is detachably installed on the top surface of the fiber grating receiving cavity.
[0010] In one embodiment, the first fixing ring and the second fixing ring are respectively provided with locking bolt through holes.
[0011] In one embodiment, the first grating encapsulation groove is provided with a sliding groove, and the second grating encapsulation groove is provided with a slider, wherein the sliding groove and the slider sleeve cooperate.
[0012] In one embodiment, the end cap is provided with a first side cover, a second side cover, and a top cover plate;
[0013] The first side cover and the second side cover are provided with two end cover mounting buckles, and the first anchoring component and the second anchoring component are respectively provided with a first end cover mounting groove and a second end cover mounting groove;
[0014] Structural adaptation between the end cap mounting buckle and the first end cap mounting slot, and between the end cap mounting buckle and the second end cap mounting slot.
[0015] In one embodiment, the top cover is provided with an adhesive injection hole.
[0016] In one embodiment, the first side cover and the second side cover are respectively provided with optical fiber through holes.
[0017] In one embodiment, the first anchoring component and the second anchoring component are respectively provided with end cap receiving grooves; the bottom surface of the end cap receiving groove is provided with an optical fiber receiving groove.
[0018] This application provides the following beneficial effects:
[0019] In this application, after the adhesive solidifies, the fiber Bragg grating is adhered to the first and second anchoring components. When the carbon fiber reinforcement experiences strain, it pulls on the first and second anchoring components in opposite axial directions. The two anchoring components pull on the solidified adhesive, transferring the strain to the fiber Bragg grating inside the adhesive. After the fiber Bragg grating experiences strain, the optical fiber collects the changed optical wavelength signal.
[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0021] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.
[0022] Figure 1 This is an exploded view of the long gauge-spacing fiber optic grating carbon fiber smart reinforcement anchorage structure shown in the embodiments of this application;
[0023] Figure 2This is an assembly state diagram of the long gauge-spacing fiber optic grating carbon fiber smart reinforcement anchoring structure shown in the embodiments of this application;
[0024] Figure 3 This is a three-dimensional structural schematic diagram of the first anchoring component shown in an embodiment of this application;
[0025] Figure 4 This is a three-dimensional structural schematic diagram of the second anchoring component shown in the embodiment of this application;
[0026] Figure 5 This is a schematic diagram of the combined state of the first anchoring component and the second anchoring component as shown in the embodiments of this application.
[0027] Figure labeling: 1. First anchoring component; 11. First fixing ring; 111. First carbon fiber reinforcement through hole; 112. First locking bolt through hole; 12. First grating encapsulation groove; 121. Sliding groove; 122. First end cap receiving groove; 123. First optical fiber receiving groove; 124. First end cap mounting slot; 2. Second anchoring component; 21. Second fixing ring; 211. Second carbon fiber reinforcement through hole; 212. Second locking bolt through hole; 22. Second grating encapsulation groove; 221. Slider; 222. Second end cap receiving groove; 223. Second optical fiber receiving groove; 224. Second end cap mounting slot; 3. End cap; 31. First side cap; 32. Second side cap; 33. Top cover plate; 4. Fiber grating receiving cavity. Detailed Implementation
[0028] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.
[0029] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0030] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0031] The fiber Bragg grating sensor in carbon fiber smart ribs has various packaging technologies. The current mainstream manufacturing method is to implant the optical fiber in the carbon fiber rib production process in one go, and then form it as a whole through pultrusion winding and curing processes. However, this manufacturing method makes it difficult to replace the fiber Bragg grating sensor when it is damaged.
[0032] To address the aforementioned technical problems, this application provides a long gauge-length fiber optic grating carbon fiber smart reinforcement anchoring structure based on microgroove encapsulation. This anchoring structure enables the grating sensor to be detachably encapsulated onto the carbon fiber reinforcement after its production, allowing for the replacement of damaged grating sensors.
[0033] Figure 1 This is an exploded view of the anchoring structure shown in the embodiment of this application.
[0034] like Figure 1 As shown, the anchoring structure includes an assemblable first anchoring component 1, a second anchoring component 2, and an end cap 3.
[0035] Figure 2 This is an assembly diagram of the anchoring structure shown in the embodiment of this application. The first anchoring component 1, the second anchoring component 2, and the end cap 3 of the anchoring structure are assembled as follows: Figure 2 As shown.
[0036] Figure 3 and Figure 4 These are three-dimensional structural schematic diagrams of the first anchoring component 1 and the second anchoring component 2, respectively.
[0037] like Figure 3 and Figure 4 As shown, the first anchoring component 1 is provided with a first fixing ring 11 and a first grating encapsulation groove 12, and the second anchoring component 2 is provided with a second fixing ring 21 and a second grating encapsulation groove 22.
[0038] The first fixing ring 11 and the second fixing ring 21 are sleeved on the carbon fiber rib along the axial direction of the carbon fiber rib and fixed thereon. The first fixing ring 11 and the second fixing ring 21 are respectively provided with a first carbon fiber rib through hole 111 and a second carbon fiber rib through hole 211.
[0039] It should be noted that the fixing ring structure is a mechanical component that locks along the axial direction of the cable, rope, or pipe structure using a locking element.
[0040] In this embodiment, the carbon fiber reinforcement passes through the first fixing ring 11 and the second fixing ring 21 in sequence. The first fixing ring 11 and the second fixing ring 21 are respectively provided with a first locking bolt through hole 112 and a second locking bolt through hole 212. The locking bolt passes through the locking bolt through hole and is tightened, so that the first fixing ring 11 and the second fixing ring 21 contract radially and clamp the carbon fiber reinforcement.
[0041] Before the first fixing ring 11 and the second fixing ring 21 are locked, the first grating encapsulation groove 12 and the second grating encapsulation groove 22 are movably connected along the axial direction of the carbon fiber reinforcement, and the first grating encapsulation groove 12 and the second grating encapsulation groove 22 are assembled to form the fiber grating receiving cavity 4.
[0042] Specifically, Figure 3 and Figure 4 The first anchoring component 1 and the second anchoring component 2 shown are movably connected by a sleeve fitting structure.
[0043] In this embodiment of the application, the first grating encapsulation groove 12 is provided with a sliding groove 121, and the second grating encapsulation groove 22 is provided with a slider 221, wherein the sliding groove 121 and the slider 221 are sleeved together.
[0044] The assembled fiber grating housing cavity 4 is as follows Figure 5 As shown, the fiber grating receiving cavity 4 is used to inject adhesive to fix the fiber grating.
[0045] Furthermore, the end cap 3 is detachably mounted on the top surface of the fiber grating receiving cavity 4.
[0046] After fixing the first anchoring component 1 and the second anchoring component 2 to the carbon fiber reinforcement, the fiber grating is placed in the fiber grating receiving cavity 4, and then the end cap 3 is installed on the fiber grating receiving cavity 4. The anchoring structure after installation is as follows: Figure 2 As shown.
[0047] Specifically, such as Figure 1 As shown, the end cap 3 is provided with a first side cap 31, a second side cap 32, and a top cap plate 33.
[0048] After the end cap 3 is installed, the first grating encapsulation slot 12, the second grating encapsulation slot 22, and the end cap 3 surround the fiber grating receiving cavity 4. The top cover plate 33 of the end cap 3 is provided with an adhesive injection hole, through which adhesive is injected into the fiber grating receiving cavity 4.
[0049] The adhesive is used to bond the fiber grating to the walls of the first grating encapsulation slot 12 and the second grating encapsulation slot 22. After the adhesive has solidified, the end cap 3 is removed.
[0050] Furthermore, the end cap 3 is movably connected to the first anchoring component 1 and the second anchoring component 2 via a snap-fit and slot structure.
[0051] Specifically, the end cap 3 is provided with end cap mounting buckles on opposite sides along the optical fiber axis, and the first anchoring component 1 and the second anchoring component 2 are respectively provided with a first end cap mounting groove 124 and a second end cap mounting groove 224. The first anchoring component 1 and the second anchoring component 2 are respectively provided with a first end cap receiving groove 122 and a second end cap receiving groove 222.
[0052] In order to preserve space for the passage of optical fibers, specifically, the first side cover 31 and the second side cover 32 are respectively provided with optical fiber through holes, and the bottom surfaces of the first end cover receiving groove 122 and the second end cover receiving groove 222 are respectively provided with a first optical fiber receiving groove 123 and a second optical fiber receiving groove 223.
[0053] In this embodiment, after the adhesive solidifies, the fiber Bragg grating is adhered to the first anchoring component 1 and the second anchoring component 2. When the carbon fiber reinforcement experiences strain, it pulls on the first anchoring component 1 and the second anchoring component 2 in opposite axial directions. The two anchoring components pull on the solidified adhesive, transferring the strain to the fiber Bragg grating inside the adhesive. After the fiber Bragg grating experiences strain, the optical fiber collects the changed optical wavelength signal.
[0054] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A long gauge-length fiber optic grating carbon fiber smart reinforcement anchoring structure based on microgroove encapsulation, characterized in that, It includes a first anchoring component (1), a second anchoring component (2), and an end cap (3); The first anchoring component (1) is provided with a first fixing ring (11) and a first grating encapsulation groove (12), and the second anchoring component (2) is provided with a second fixing ring (21) and a second grating encapsulation groove (22). The first fixing ring (11) and the second fixing ring (21) are fixedly sleeved on the carbon fiber reinforcement along the axial direction of the carbon fiber reinforcement; The first grating encapsulation groove (12) and the second grating encapsulation groove (22) are movably connected along the axial direction of the carbon fiber reinforcement. The first grating encapsulation groove (12) and the second grating encapsulation groove (22) are assembled to form a fiber grating receiving cavity (4). The fiber grating receiving cavity (4) is used to inject adhesive for fiber grating encapsulation. The end cap is detachably installed on the top surface of the fiber grating receiving cavity (4).
2. The long gauge length fiber optic grating carbon fiber smart reinforcement anchoring structure based on microgroove encapsulation according to claim 1, characterized in that, The first fixing ring (11) and the second fixing ring (21) are respectively provided with locking bolt through holes.
3. The long gauge length fiber optic grating carbon fiber smart reinforcement anchoring structure based on microgroove encapsulation according to claim 1, characterized in that, The first grating encapsulation groove (12) is provided with a sliding groove (121), and the second grating encapsulation groove (22) is provided with a slider (221). The sliding groove (121) and the slider (221) are sleeved together.
4. The long gauge length fiber optic grating carbon fiber smart reinforcement anchoring structure based on microgroove encapsulation according to claim 1, characterized in that, The end cap (3) is provided with a first side cap (31), a second side cap (32) and a top cap plate (33); The first side cover (31) and the second side cover (32) are provided with two end cover mounting buckles, and the first anchoring component (1) and the second anchoring component (2) are respectively provided with a first end cover mounting groove (124) and a second end cover mounting groove (224). Structural adaptation between the end cap mounting buckle and the first end cap mounting slot (124), and between the end cap mounting buckle and the second end cap mounting slot (224).
5. The long gauge length fiber optic grating carbon fiber smart reinforcement anchoring structure based on microgroove encapsulation according to claim 4, characterized in that, The top cover is provided with an adhesive injection hole.
6. The long gauge length fiber optic grating carbon fiber smart reinforcement anchoring structure based on microgroove encapsulation according to claim 4, characterized in that, The first side cover (31) and the second side cover (32) are respectively provided with optical fiber through holes.
7. The long gauge length fiber optic grating carbon fiber smart reinforcement anchoring structure based on microgroove encapsulation according to claim 1, characterized in that, The first anchoring component (1) and the second anchoring component (2) are respectively provided with end cap receiving grooves; The bottom surface of the end cap receiving groove is provided with an optical fiber receiving groove.