Portable fiber bragg grating demodulator

Abstract

The utility model belongs to the technical field of fiber bragg grating demodulators, and particularly discloses a portable fiber bragg grating demodulator which comprises a frame body, the cross section of the frame body is in a U shape, a demodulator body is fixedly connected in the frame body, two symmetrical rotating shafts are rotatably connected in the frame body, and the two rotating shafts are connected with the demodulator body. The outer surfaces of the two rotating shafts are fixedly connected with baffles, the top of the frame body is provided with a top cover, the opposite sides of the two baffles are provided with second sliding grooves, the frame body is provided with a first sliding groove, and the interior of the first sliding groove is communicated with the interiors of the second sliding grooves. The two baffles are arranged on the frame body, so that the two baffles and the frame body form a box body, the demodulator body can be better protected under the cooperation of the top cover, and the situation that the demodulator body is directly exposed in the external environment, objects in the external environment are prone to colliding with the demodulator body, and the demodulator body is damaged is reduced to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of fiber grating demodulators, and particularly relates to a portable fiber grating demodulator. Background Art

[0002] Fiber grating sensors are a type of fiber optic sensor and are widely used in fields such as structural health monitoring, temperature monitoring, and railway rockfall monitoring. Since fiber grating sensors rely on the change in the central wavelength of the reflected light to reflect the magnitude of the measured physical quantity, fiber grating sensors need to be combined with fiber grating demodulators to convert the optical signal into an electrical signal that can be recognized by a computer system before they can be finally used by people.

[0003] Currently, some existing fiber grating sensors are widely used in the long-term health monitoring of large structures such as bridges, dams, tunnels, oil tanks, cables, switch cabinets, and long-distance oil pipelines, and can also be used for spectral analysis related to wavelength and power, and optical device testing. However, due to the lack of a protective structure in some existing fiber grating sensors, when the instrument is not in use, it is often directly exposed to the environment, making it difficult to protect the fiber grating demodulator, and it is difficult to avoid contamination or scratching and collision by dust and other impurities. Prolonged exposure is likely to cause damage to the instrument and affect its service life. In view of the above situation, technological innovation is carried out on the basis of the existing device. Content of the Utility Model

[0004] The purpose of the utility model is to provide a portable fiber grating demodulator to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A portable fiber grating demodulator, including a frame body, the cross-section of the frame body is in a C shape, a demodulator body is fixedly connected inside the frame body, two symmetrical rotating shafts are rotatably connected inside the frame body, baffles are fixedly connected to the outer surfaces of the two rotating shafts, a top cover is arranged on the top of the frame body, second chutes are opened on the opposite sides of the two baffles, a first chute is opened on the frame body, the inside of the first chute is communicated with the inside of the second chute, two symmetrical L-shaped frames are fixedly connected to the bottom of the top cover, a moving groove is opened inside the bottom plate of the frame body, and a transmission adjustment positioning device is arranged inside the moving groove.

[0006] Preferably, the two baffles and the frame body form a box body.

[0007] Preferably, the cross-section of the L-shaped frame is L-shaped, and the surface of the L-shaped frame is communicated with the inside of the second chute and the first chute.

[0008] Preferably, a handle is rotatably connected to the surface of the top cover.

[0009] Preferably, a rolling ball is arranged at the bottom of the L-shaped frame.

[0010] Preferably, the transmission adjustment and positioning device includes a movable plate, the surface of the movable plate is slidingly connected to the inside of the movable groove, the outer surface of the rotating shaft is provided with a transmission groove, the outer surface of the rotating shaft is provided with a positioning groove, the interior of the positioning groove is connected to the interior of the transmission groove, the side of the movable plate close to the positioning groove is plugged into the interior of the positioning groove, the interior of the movable groove is rotatably connected to a threaded rod extending to the outside of the frame, and the outer surface of the threaded rod is threadedly connected to the interior of the movable plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The portable fiber Bragg grating demodulator slides into the interior of the positioning groove through the moving plate, so that the two baffles and the frame form a box body, and with the cooperation of the top cover, the demodulator body can be better protected, and to a certain extent, the demodulator body is directly exposed to the external environment, so that objects in the external environment are easy to collide with the demodulator body, causing the demodulator body to be damaged, so that the demodulator body can be better protected.

[0013] 2. The portable fiber grating demodulator, after the threaded rod drives the movable plate to slide out of the interior of the positioning groove and slide into the interior of the transmission groove, releases the fixation of the baffle and exposes the demodulator body to the external environment, so that the staff can more smoothly connect the demodulator body. At the same time, another staff member rotates the baffle to a certain angle, and then the staff member rotates the threaded rod in the opposite direction to make the movable plate slide into the interior of the positioning groove, thereby realizing the adjustment of the position height of the demodulator body, so that the staff can more conveniently connect the demodulator body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a portable fiber Bragg grating demodulator of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the frame of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the top cover of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the movable trough of the utility model;

[0018] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure of A.

[0019] In the figure: 1. Frame body; 2. Top cover; 3. L-shaped frame; 4. First sliding groove; 5. Handle; 6. Rotating shaft; 7. Baffle; 8. Second sliding groove; 9. Demodulator body; 10. Ball; 11. Threaded rod; 12. Moving groove; 13. Moving plate; 14. Transmission groove; 15. Positioning groove. Specific implementation manner

[0020] Please refer to Figure 1-5 , the present utility model provides a technical solution: a portable fiber grating demodulator, including a frame body 1, the cross-section of the frame body 1 is in a C shape, the inside of the frame body 1 is fixedly connected with a demodulator body 9, the demodulator body 9 is an existing structure and will not be elaborated here. Two symmetric rotating shafts 6 are rotatably connected inside the frame body 1, and baffles 7 are fixedly connected to the outer surfaces of the two rotating shafts 6. The two baffles 7 and the frame body 1 form a box body. A top cover 2 is arranged on the top of the frame body 1. Second sliding grooves 8 are opened on the opposite sides of the two baffles 7, and a first sliding groove 4 is opened on the frame body 1. The inside of the first sliding groove 4 communicates with the inside of the second sliding groove 8. Two symmetric L-shaped frames 3 are fixedly connected to the bottom of the top cover 2. The cross-section of the L-shaped frame 3 is in an L shape, and the surface of the L-shaped frame 3 communicates with the inside of the second sliding groove 8 and the first sliding groove 4. A moving groove 12 is opened inside the bottom plate of the frame body 1, and a transmission adjustment and positioning device is arranged inside the moving groove 12.

[0021] Further, a handle 5 is rotatably connected to the surface of the top cover 2, which can make it more convenient for the staff to take the device. At the same time, when the handle 5 rotates and contacts the frame body 1, the handle 5 can limit the top cover 2, making it more convenient for the staff to extract the device.

[0022] Further, balls 10 are arranged at the bottom of the L-shaped frames 3, which can make the L-shaped frames 3 move more smoothly inside the second sliding grooves 8 and the first sliding grooves 4.

[0023] The transmission adjustment and positioning device includes a moving plate 13. The surface of the moving plate 13 is slidably connected to the inside of the moving groove 12. A transmission groove 14 is opened on the outer surface of the rotating shaft 6, and a positioning groove 15 is opened on the outer surface of the rotating shaft 6. The inside of the positioning groove 15 communicates with the inside of the transmission groove 14. The number of the positioning grooves 15 is multiple, and the multiple positioning grooves 15 are equidistantly arranged on the rotating shaft 6 in a circular array manner. One side of the moving plate 13 close to the positioning groove 15 is inserted into the inside of the positioning groove 15, and the moving plate 13 can slide into and out of the inside of the positioning groove 15.

[0024] At the same time, the movable plate 13 slides into the interior of the positioning groove 15, so that the two baffles 7 and the frame 1 form a box body, and with the cooperation of the top cover 2, the demodulator body 9 can be better protected, and to a certain extent, the demodulator body 9 is directly exposed to the external environment, making it easy for objects in the external environment to collide with the demodulator body 9, causing damage to the demodulator body 9, thereby the demodulator body 9 can be better protected.

[0025] Furthermore, a threaded rod 11 extending to the outside of the frame 1 is rotatably connected inside the movable groove 12 , and an outer surface of the threaded rod 11 is threadably connected to the inside of the movable plate 13 .

[0026] After the staff makes the L-shaped frame 3 slide out of the second slide groove 8, the staff rotates the threaded rod 11, so that the threaded rod 11 drives the movable plate 13 to slide out of the positioning groove 15 and slide into the transmission groove 14, so that the fixation of the baffle 7 is released, and the demodulator body 9 can be exposed to the external environment, so that the staff can more smoothly connect the demodulator body 9. At the same time, another staff member rotates the baffle 7, and after the baffle 7 is rotated to a certain angle, the staff rotates the threaded rod 11 in the opposite direction, so that the movable plate 13 slides into the positioning groove 15, thereby realizing the adjustment of the position height of the demodulator body 9, so that the staff can more conveniently connect the demodulator body 9.

[0027] Working principle: For this type of portable fiber Bragg grating demodulator, first slide the moving plate 13 into the interior of the positioning groove 15, so that the two baffles 7 and the frame 1 form a box body, and with the cooperation of the top cover 2, the demodulator body 9 can be better protected, and to a certain extent, reduce the demodulator body 9 directly exposed to the external environment, so that objects in the external environment are easy to collide with the demodulator body 9, causing the demodulator body 9 to be damaged, so that the demodulator body 9 can be better protected. After the staff makes the L-shaped frame 3 slide out of the interior of the second slide groove 8, through After the staff rotates the threaded rod 11, the threaded rod 11 drives the movable plate 13 to slide out of the positioning groove 15 and slide into the transmission groove 14, so that the fixation of the baffle 7 is released, and the demodulator body 9 can be exposed to the external environment, so that the staff can connect the demodulator body 9 more smoothly. At the same time, another staff member rotates the baffle 7, and after the baffle 7 is rotated to a certain angle, the staff member rotates the threaded rod 11 in the opposite direction, so that the movable plate 13 slides into the positioning groove 15, thereby realizing the adjustment of the position height of the demodulator body 9.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable fiber Bragg grating demodulator, comprising a frame (1), characterized in that: The cross-section of the frame body (1) is in a C shape. Inside the frame body (1), a demodulator body (9) is fixedly connected. Inside the frame body (1), two symmetrical rotating shafts (6) are rotatably connected. On the outer surfaces of the two rotating shafts (6), baffles (7) are fixedly connected. On the top of the frame body (1), a top cover (2) is provided. On the opposite sides of the two baffles (7), second sliding grooves (8) are opened. On the frame body (1), a first sliding groove (4) is opened. The inside of the first sliding groove (4) communicates with the inside of the second sliding groove (8). At the bottom of the top cover (2), two symmetrical L-shaped frames (3) are fixedly connected. Inside the bottom plate of the frame body (1), a moving groove (12) is opened. Inside the moving groove (12), a transmission adjustment and positioning device is provided.

2. A portable fiber Bragg grating demodulator according to claim 1, characterized in that: The two baffles (7) and the frame body (1) form a box body.

3. The portable fiber Bragg grating demodulator according to claim 1, characterized in that: The cross-section of the L-shaped frame (3) is L-shaped. The surface of the L-shaped frame (3) communicates with the inside of the second sliding groove (8) and the first sliding groove (4).

4. The portable fiber Bragg grating demodulator according to claim 1, characterized in that: On the surface of the top cover (2), a handle (5) is rotatably connected.

5. The portable fiber Bragg grating demodulator according to claim 1, characterized in that: At the bottom of the L-shaped frame (3), a rolling ball (10) is provided.

6. The portable fiber Bragg grating demodulator according to claim 1, characterized in that: The transmission adjustment and positioning device includes a moving plate (13). The surface of the moving plate (13) is slidably connected to the inside of the moving groove (12). On the outer surface of the rotating shaft (6), a transmission groove (14) is opened. On the outer surface of the rotating shaft (6), a positioning groove (15) is opened. The inside of the positioning groove (15) communicates with the inside of the transmission groove (14). One side of the moving plate (13) close to the positioning groove (15) is inserted into the inside of the positioning groove (15).

7. The portable fiber Bragg grating demodulator according to claim 6, characterized in that: Inside the moving groove (12), a threaded rod (11) extending outside the frame body (1) is rotatably connected.

8. The portable fiber Bragg grating demodulator according to claim 7, characterized in that: The outer surface of the threaded rod (11) is threadedly connected to the inside of the moving plate (13).

Images