Fiber grating sensor

Abstract

The utility model relates to the field of fiber grating sensors, in particular to a fiber grating sensor. Comprising two mounting frames, sensing parts are mounted on the inner walls of the two mounting frames, optical fiber cables are mounted at the two ends of each sensing part, adjusting structures are arranged on the arc surfaces of the two optical fiber cables, each adjusting structure comprises a circular ring, the circular rings are movably connected with the optical fiber cables, and fixing frames are fixedly connected to the outer arc surfaces of the circular rings. A cover frame is rotatably connected to the inner wall of the fixing frame, a limiting rod is inserted into the side, away from the fixing frame, of the cover frame in a threaded mode, the arc face of the limiting rod is slidably connected with the fixing frame, and a plurality of storage grooves are formed in the surface of the fixing frame. The fiber bragg grating sensor provided by the utility model has the advantages that the fixing frame is matched with the elastic band and the cover frame to accommodate the redundant part of the optical fiber cable, a user can conveniently manage the optical fiber cable, and the optical fiber cable is prevented from being wound and damaged.

Description

Technical Field

[0001] This utility model relates to the field of fiber Bragg grating sensors, and more particularly to a fiber Bragg grating sensor. Background Technology

[0002] A fiber Bragg grating sensor is a fiber optic sensor based on fiber Bragg grating technology. It is mainly used to measure physical quantities such as strain, temperature, pressure, and vibration. A fiber Bragg grating sensor consists of a sensing component, a mounting bracket, and fiber optic cables.

[0003] Existing technologies, such as the utility model patent with publication number CN221571524U, disclose a fiber Bragg grating sensor. This patent employs a flexible substrate and multiple fiber Bragg grating sensing components, which are spaced apart along the circumferential direction of the flexible substrate. Each fiber Bragg grating sensing component includes a fiber Bragg grating and further comprises multiple sheaths arranged sequentially along the extension direction of the fiber Bragg grating; multiple desensitization structures, each of which has a through-hole cavity and is adapted between two adjacent sheaths, with both ends of the cavity fixedly connected to the corresponding sheath; wherein the fiber Bragg grating passes sequentially through the multiple sheaths connected by the multiple desensitization structures; and wherein the desensitization structure is a flexible component.

[0004] The following problems exist in the use of fiber Bragg grating sensors: When arranging fiber Bragg grating sensors, a certain length of fiber optic cable is reserved. The fiber optic cable lacks protection and is prone to tangling or bending due to external forces, resulting in fiber optic cable breakage and making it inconvenient for users to manage. Utility Model Content

[0005] The purpose of this invention is to solve the shortcomings of existing technologies, such as the inconvenience of managing excess fiber optic cable length and its susceptibility to breakage.

[0006] To solve the above-mentioned technical problems, this utility model provides a fiber optic grating sensor, comprising: two mounting brackets, sensing components mounted on the inner walls of the two mounting brackets, optical fibers mounted at both ends of the sensing components, and adjustment structures provided on the arc surfaces of the two optical fibers. Each adjustment structure includes a ring, which is movably connected to the optical fiber. A fixing frame is fixedly connected to the outer arc surface of the ring. A cover frame is rotatably connected to the inner wall of the fixing frame. A limiting rod is threaded into the side of the cover frame away from the fixing frame. The arc surface of the limiting rod is slidably connected to the fixing frame. A plurality of storage slots are formed on the surface of the fixing frame. A plurality of positioning slots are formed on the surface of the fixing frame corresponding to the storage slots. A positioning rod is fixedly connected to one side of the inner wall of each positioning slot. An elastic band is fixedly connected to the surface of the fixing frame. A clamping plate is fixedly connected to the end of the elastic band away from the fixing frame. The clamping plate is slidably connected to the arc surface of one of the positioning rods.

[0007] The above components achieve the following effect: the fixing bracket, together with the elastic band and the cover frame, stores the excess length of the optical fiber cable, making it convenient for users to manage the optical fiber cable and preventing the optical fiber cable from getting tangled and damaged.

[0008] Preferably, a reserved groove is provided on the upper surface of the cover frame.

[0009] The effect achieved by the above components is to facilitate the operation of the cover frame by moving and flipping it with the help of the reserved slot.

[0010] Preferably, rubber blocks are fixedly connected to both ends of the card plate.

[0011] The effect achieved by the above components is to improve the comfort of the user when operating the pallet by moving the pallet with the help of the rubber block.

[0012] Preferably, one end of the positioning rod is arc-shaped.

[0013] The effect achieved by the above components is that one end of the positioning rod is arc-shaped, which makes it easy for the clamping plate to be fitted onto the positioning rod.

[0014] Preferably, each of the two mounting brackets has an auxiliary structure on its surface. The auxiliary structure includes two support blocks, which are fixedly connected to the mounting bracket. The inner walls of the two support blocks are rotatably connected to a bidirectional screw. The arc surface of the bidirectional screw is threadedly connected to two movable frames. The lower surface of the movable frames is slidably connected to the mounting bracket. The inner wall of the movable frames is slidably connected to a clamping block. The upper surface of the clamping block is fixedly connected to a mating block. A mating rod is fixedly connected to one side of the inner wall of the movable frames. The arc surface of the mating rod is slidably connected to the clamping block.

[0015] The above components achieve the following effects: by operating the bidirectional screw, the mounting bracket is fixed in the designated position using two clamping blocks. The two clamping blocks can be stored, and when it is inconvenient to clamp, the mounting bracket can be fixed by drilling holes and installing screws.

[0016] Preferably, both ends of the bidirectional screw are fixedly connected with a plurality of anti-slip protrusions, and the plurality of anti-slip protrusions are evenly distributed on the bidirectional screw.

[0017] The effect achieved by the above components is to increase the friction at both ends of the bidirectional screw through the anti-slip protrusions, making it easier for the user to rotate the bidirectional screw.

[0018] Preferably, the two clamping blocks have a plurality of anti-slip textures on the side where they are close to each other.

[0019] The effect achieved by the above components is to increase the friction on the surface of the clamping block through the anti-slip texture, thereby improving the limiting effect of the clamping block.

[0020] Compared with related technologies, the fiber Bragg grating sensor provided by this utility model has the following advantages:

[0021] By setting an adjustment structure, the fixing frame, together with the cover frame, stores the optical fiber cable, winding it into multiple storage slots in the fixing frame for easy access by the user. The elastic band can further limit the optical fiber cable in the storage slots. The operating plate can change the number of turns of the elastic band binding the optical fiber cable before the cover frame is opened. When the cover frame is opened later, the optical fiber cable covered by the elastic band will not loosen, improving the stability of the optical fiber cable during the retrieval operation.

[0022] By setting up an auxiliary structure and operating a bidirectional screw, the mounting bracket can be fixed in a designated position using two clamping blocks. The two clamping blocks can be stored away, and when it is inconvenient to clamp them, the mounting bracket can be fixed by drilling holes and installing screws. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a fiber Bragg grating sensor provided by the present invention;

[0024] Figure 2 for Figure 1 The diagram shows the structural schematic of the adjustment structure.

[0025] Figure 3 for Figure 2 A partial structural diagram of the adjustment structure is shown;

[0026] Figure 4 for Figure 1 The diagram shows the structure of the auxiliary structure.

[0027] Figure 5 for Figure 4The diagram shows the structure of the auxiliary structure.

[0028] The following are the labeling elements in the diagram: 1. Mounting bracket; 2. Sensing component; 3. Fiber optic cable; 4. Adjustment structure; 401. Ring; 402. Fixing bracket; 403. Cover frame; 404. Limiting rod; 405. Reserved slot; 406. Storage slot; 407. Positioning slot; 408. Positioning rod; 409. Elastic band; 410. Clamping plate; 411. Rubber block; 5. Auxiliary structure; 51. Support block; 52. Bidirectional screw; 53. Moving frame; 54. Clamping block; 55. Connecting block; 56. Connecting rod. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0031] Please see Figures 1 to 4 The present invention provides a fiber optic grating sensor, comprising: two mounting brackets 1, sensing components 2 mounted on the inner walls of the two mounting brackets 1, optical fibers 3 mounted on both ends of the sensing components 2, adjustment structures 4 provided on the arc surfaces of the two optical fibers 3, and auxiliary structures 5 provided on the surfaces of the two mounting brackets 1.

[0032] In the embodiments of this utility model, please refer to Figure 2 and Figure 3The adjustment structure 4 includes a ring 401, which is movably connected to the optical fiber 3. A fixing frame 402 is fixedly connected to the outer arc surface of the ring 401. A cover frame 403 is rotatably connected to the inner wall of the fixing frame 402. A limiting rod 404 is threadedly inserted into the side of the cover frame 403 away from the fixing frame 402. The arc surface of the limiting rod 404 is slidably connected to the fixing frame 402. Several storage slots 406 are formed on the surface of the fixing frame 402. Several positioning slots 407 are formed on the surface of the fixing frame 402 at positions corresponding to the storage slots 406. A positioning rod 408 is fixedly connected to one side of the inner wall of the positioning slot 407. An elastic band 409 is fixedly connected to the surface of the fixing frame 402. An elastic band 409 is fixedly connected to the end away from the fixing frame 402. The card plate 410 is slidably connected to the arc surface of one of the positioning rods 408. The fixing frame 402, together with the elastic band 409 and the cover frame 403, stores the excess length of the optical fiber cable 3, making it convenient for users to manage the optical fiber cable 3 and preventing the optical fiber cable 3 from being tangled and damaged. The upper surface of the cover frame 403 has a reserved groove 405. The cover frame 403 is moved and flipped with the reserved groove 405, making it convenient for users to operate the cover frame 403. Both ends of the card plate 410 are fixedly connected to rubber blocks 411. The rubber blocks 411 drive the card plate 410 to move, improving the comfort of users when operating the card plate 410. One end of the positioning rod 408 is arc-shaped, which makes it easy for the card plate 410 to be fitted onto the positioning rod 408.

[0033] In the embodiments of this utility model, please refer to Figure 4 and Figure 5 The auxiliary structure 5 includes two support blocks 51, which are fixedly connected to the mounting frame 1. A bidirectional screw 52 is rotatably connected to the inner wall of each support block 51. Two movable frames 53 are threadedly connected to the arc surface of the bidirectional screw 52. The lower surface of each movable frame 53 is slidably connected to the mounting frame 1. A clamping block 54 is slidably connected to the inner wall of each movable frame 53. A mating block 55 is fixedly connected to the upper surface of the clamping block 54. A mating rod 56 is fixedly connected to one side of the inner wall of each movable frame 53. The arc surface of the mating rod 56 is slidably connected to the clamping block 54. By operating the bidirectional screw 52, ​​the two clamping blocks... Block 54 fixes the mounting bracket 1 in the designated position. The two clamping blocks 54 can be stored. When it is inconvenient to clamp, the mounting bracket 1 can be fixed by drilling and installing screws. Both ends of the bidirectional screw 52 are fixedly connected with several anti-slip protrusions. The anti-slip protrusions are evenly distributed on the bidirectional screw 52. The anti-slip protrusions increase the friction at both ends of the bidirectional screw 52, ​​making it easier for the user to rotate the bidirectional screw 52. Several anti-slip textures are opened on the side of the two clamping blocks 54 that are close to each other. The anti-slip textures increase the friction on the surface of the clamping blocks 54, making the limiting effect of the clamping blocks 54 better.

[0034] The working principle of the fiber optic grating sensor provided by this utility model is as follows: By setting the adjustment structure 4, firstly, the rotation limit rod 404 is rotated. The limit rod 404 moves along the cover frame 403 away from the fixed frame 402 by means of the thread, releasing the limit on the cover frame 403. The cover frame 403 is then flipped upward, moving away from the fixed frame 402. Then, the operating plate 410 is disengaged from the positioning rod 408 in the positioning groove 407. Similarly, the operating plate 410 and the elastic band 409 are moved upward away from the fixed frame 402. Then, the ring 401 and the fixed frame 402 are moved to a suitable position along the fiber optic line 3. Next, the excess length of the fiber optic line 3 is wound sequentially into the multiple storage slots 406 on the fixed frame 402. Then, the elastic band 409 is pulled to block the fiber optic line 3 in the storage slots 406. The operating plate 410 is then fitted onto the positioning rod 408 in the appropriate positioning slot 407. Finally, the cover is rotated to close. The frame 403 is fixed in position by rotating the limiting rod 404 in the opposite direction. When the fiber optic cable 3 needs to be laid out, the clamping plate 410 is first disengaged from the positioning rod 408 and moves towards the ring 401 along the gap between the clamping frame and the fixing frame 402. The clamping plate 410 is moved through the corresponding number of positioning slots 407 according to the number of loops to be laid out. Then the clamping plate 410 is placed on the positioning rod 408 at the corresponding position. Then the limiting rod 404 is operated to open the frame 403 and the fiber optic cable 3, which is no longer servoed by the elastic band 409, is taken out from the storage slot 406. The frame 403 is moved and flipped with the help of the reserved slot 405 to facilitate the operation of the frame 403 by the user. The clamping plate 410 is moved with the help of the rubber block 411 to improve the comfort of the user when operating the clamping plate 410. One end of the positioning rod 408 is arc-shaped to facilitate the clamping plate 410 to be placed on the positioning rod 408.

[0035] By setting the auxiliary structure 5, the two clamping blocks 54 are first moved downwards. The clamping blocks 54 move downwards along the inner wall of the moving frame 53, and the clamping blocks 54 drive the docking block 55 to move. When the docking block 55 is aligned with the docking rod 56, the two clamping blocks 54 are moved away from each other. The clamping blocks 54 drive the docking block 55 to fit onto the docking rod 56. Then, the entire mounting frame 1 is moved closer to the designated installation location, so that the two clamping blocks 54 are located on the crossbeam of the installation location. Then, the bidirectional screw 52 is rotated. The bidirectional screw 52 drives the two moving frames 53 to move closer to each other through the thread. The two moving frames 53 drive the clamping blocks 54 to move through the docking rod 56 and the docking block 55. The two clamping blocks 54 are clamped and fixed at the designated location in the direction of moving closer to each other. Among them, the anti-slip protrusions increase the friction at both ends of the bidirectional screw 52, ​​making it easier for the user to rotate the bidirectional screw 52. The anti-slip texture increases the friction on the surface of the clamping blocks 54, making the limiting effect of the clamping blocks 54 better.

[0036] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0037] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A fiber grating sensor, characterized by, The utility model relates to a kind of installation frame, including: Two installation frames (1), the inner wall of two installation frames (1) is equipped with sensing component (2), the both ends of sensing component (2) are equipped with optical fiber wire (3), the circular arc surface of two optical fiber wires (3) is equipped with adjusting structure (4), adjusting structure (4) includes circular ring (401), circular ring (401) is movably connected with optical fiber wire (3), the outer circular arc surface of circular ring (401) is fixedly connected with fixed frame (402), the inner wall of fixed frame (402) is rotatably connected with cover frame (403), the side of cover frame (403) away from fixed frame (402) is threadedly inserted with limiting rod (404), the circular arc surface of limiting rod (404) is slidably connected with fixed frame (402), the surface of fixed frame (402) is equipped with a plurality of receiving grooves (406), the surface of fixed frame (402) is equipped with a plurality of positioning grooves (407) on the position corresponding receiving groove (406), the inner wall side of positioning groove (407) is fixedly connected with positioning rod (408), the surface of fixed frame (402) is fixedly connected with elastic band (409), the end of elastic band (409) away from fixed frame (402) is fixedly connected with clamping plate (410), the circular arc surface of clamping plate (410) and one of positioning rod (408) is slidably connected.

2. A fiber grating sensor according to claim 1, characterized in that, The upper surface of cover frame (403) is equipped with reserved slot (405).

3. The fiber grating sensor according to claim 1, wherein, The both ends of clamping plate (410) are fixedly connected with rubber block (411).

4. The fiber grating sensor of claim 1, wherein, The end of positioning rod (408) is arc-shaped.

5. The fiber grating sensor of claim 1, wherein, The surface of two installation frames (1) is equipped with auxiliary structure (5), auxiliary structure (5) includes two supporting blocks (51), two supporting blocks (51) are fixedly connected with installation frame (1), the inner wall of two supporting blocks (51) is rotatably connected with bidirectional screw rod (52), the circular arc surface of bidirectional screw rod (52) is threadedly connected with two moving frames (53), the lower surface of moving frame (53) is slidably connected with installation frame (1), the inner wall of moving frame (53) is slidably connected with clamping block (54), the upper surface of clamping block (54) is fixedly connected with butt joint block (55), the inner wall side of moving frame (53) is fixedly connected with butt joint rod (56), the circular arc surface of butt joint rod (56) is slidably connected with clamping block (54).

6. A fiber grating sensor according to claim 5, wherein, The both ends of bidirectional screw rod (52) are fixedly connected with a plurality of anti-skid protrusions, a plurality of anti-skid protrusions are evenly distributed on bidirectional screw rod (52).

7. The fiber grating sensor of claim 5, wherein, The side of two clamping blocks (54) close to each other is equipped with a plurality of anti-skid lines.

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