CN219416628U - Monitoring device of cable-stayed bridge based on fiber bragg grating - Google Patents

Abstract

The utility model relates to the technical field of monitoring and discloses a cable-stayed bridge monitoring device based on fiber gratings, which comprises a demodulator body, wherein one side of the demodulator body is connected with a baffle plate and a supporting plate, one side of the supporting plate, which is close to the demodulator body, is hinged with a supporting component, the other side of the supporting component is propped against the bottom surface of the demodulator body, one side of the baffle plate, which is close to the supporting plate, is connected with a limiting component, and the other side of the limiting component is connected with the supporting component. This kind of monitoring devices based on fiber grating's cable-stay bridge turns over the backup pad downwards, and the backup pad after the upset turns over the bottom surface of demodulation appearance body again with supporting component, supports in the bottom surface of demodulation appearance body through the mode of triangle support, increases the height of demodulation appearance body and ground, prevents that sleet etc. from entering into the demodulation appearance body inside along the bottom surface of demodulation appearance body and causing components and parts to damage.

Description

Monitoring device of cable-stayed bridge based on fiber bragg grating

Technical Field

The utility model relates to the technical field of monitoring, in particular to a monitoring device of a cable-stayed bridge based on fiber gratings.

Background

The bridge is often affected by various weather conditions and vehicle loads in daily use, and the factors can lead to the structural strain and deformation of the bridge, thereby affecting the safety condition of the bridge. In order to ensure public safety, it becomes important to monitor and evaluate the structural health of the bridge in real time.

The monitoring device of the cable-stayed bridge based on the fiber bragg grating generally comprises a light source, a grating fiber optic sensor, a spectrometer and a data acquisition unit. The light source emits light, and after passing through the grating optical fiber sensor, the signal is transmitted to the spectrometer and the data collector for analysis and processing. By analyzing and processing the signals, the structural health state of the bridge, such as stress, deformation, damage and the like, can be obtained. In the process, the grating fiber sensor plays a key role, and can realize high-precision monitoring of the health state of the bridge structure

The existing fiber grating sensing demodulation devices are mainly used for bridge detection devices such as cable-stayed bridges, but the existing fiber grating sensing demodulation devices are connected with a computer when in use, and various detection is carried out through the computer, but the bridge devices are all located outdoors for the cable-stayed bridges, so that the fiber grating demodulation devices and the computer devices can not be supported at the place where the fiber grating demodulation devices are located, and thus detection personnel can only place the fiber grating demodulation devices and the computer devices on the ground.

The patent with the publication number of CN216954600U is found to be authorized through the search, and discloses a fiber grating intelligent demodulator monitoring device, which comprises a machine body, a limiting mechanism and a butt joint jack, wherein the butt joint jack is arranged on the back of the machine body, the limiting mechanism comprises a limiting plate and a limiting groove, and the limiting groove is formed in the upper surface of the limiting plate. This fiber bragg grating intelligent demodulation appearance monitoring devices inserts the butt joint of line source to the inside of butt joint jack, accomplishes all line source butt joints back, and the staff rotates the turn button and drives the threaded rod and rotate, makes the threaded rod drive the limiting plate and moves forward along the guide slot, makes the front of limiting plate support the butt joint rear end at the line source, and its line source is pulled out through the spacing groove, can effectively avoid the line source to connect when the line source is pulled, appears the phenomenon that drops, has prevented that the line source connects to drop and has influenced fiber bragg grating intelligent demodulation appearance's normal monitoring work, has improved fiber bragg grating intelligent demodulation appearance's practicality.

Although the problem that the line source connector falls off is solved by the technical scheme of the patent, the problem that rain and snow enter the fiber grating demodulator and the computer to cause damage to internal components still exists.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a monitoring device of a cable-stayed bridge based on fiber bragg gratings, which at least solves one of the problems presented by the background art, such as: when the user uses the detection device with rain and snow on the bottom surface, rain and snow and the like are not likely to flow into the device.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a monitoring devices of cable-stay bridge based on fiber grating, includes the demodulation appearance body that can be connected with the optic fibre, and one side of demodulation appearance body is connected with baffle and backup pad, and one side that the backup pad is close to demodulation appearance body articulates there is supporting component, and supporting component's opposite side offsets with demodulation appearance body bottom surface, and one side that the baffle is close to the backup pad is connected with spacing subassembly, and spacing subassembly's opposite side is connected with supporting component.

Further, the support assembly comprises a long plate and a short plate, the long plate is rotatably connected with the short plate, and the long plate is hinged with the support plate.

Further, the junction of backup pad and longboard has seted up and has accomodate the groove, long board and shortboard all with accomodate the groove joint.

Further, the baffle and the supporting plate are both rotationally connected with the demodulator body.

Further, the limiting assembly comprises a clamping strip and two limiting buckles, the bottom surfaces of the two limiting buckles are connected with the supporting assembly, the inner wall of the clamping strip is clamped with the two limiting buckles, and the bottom surface of the clamping strip is connected with the baffle.

Further, one side of the clamping strip, which is close to the baffle, is fixedly connected with a T-shaped sliding block, and one side of the baffle, which is close to the clamping strip, is provided with a sliding groove, and the T-shaped sliding block is in sliding connection with the sliding groove.

Further, the rotating shafts of the baffle plate, the supporting plate and the demodulator body and the rotating shafts of the long plate and the short plate are damping rotating shafts.

Compared with the prior art, the utility model has the following beneficial effects:

this kind of monitoring devices based on fiber grating's cable-stay bridge turns over the backup pad downwards, and the backup pad after the upset turns over the bottom surface of demodulation appearance body again with supporting component, supports in the bottom surface of demodulation appearance body through the mode of triangle support, increases the height of demodulation appearance body and ground, prevents that sleet etc. from entering into the demodulation appearance body inside along the bottom surface of demodulation appearance body and causing components and parts to damage.

Drawings

FIG. 1 is a schematic view of the overall appearance of the present utility model;

FIG. 2 is a schematic view of the baffle and support plate of the present utility model after being deployed;

FIG. 3 is an enlarged schematic view of a portion of the support plate and support assembly of the present utility model;

fig. 4 is an enlarged schematic view of the spacing assembly of the present utility model.

In the figure: 1. a demodulator body; 2. a baffle; 21. a chute; 3. a support plate; 31. a storage groove; 4. a long plate; 5. a short plate; 6. a limit button; 7. clamping strips; 8. t-shaped slide block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-4, a cable-stayed bridge monitoring device based on fiber bragg gratings comprises a demodulator body 1 capable of being connected with a fiber, wherein one side of the demodulator body 1 is connected with a baffle plate 2 and a support plate 3, one side of the support plate 3, which is close to the demodulator body 1, is hinged with a support assembly, the other side of the support assembly is propped against the bottom surface of the demodulator body 1, one side of the baffle plate 2, which is close to the support plate 3, is connected with a limit assembly, and the other side of the limit assembly is connected with the support assembly.

The structure of the monitoring device of the cable-stayed bridge based on the fiber grating is similar to that of the existing monitoring device, such as the monitoring device of the fiber grating intelligent demodulator disclosed in the patent with the publication number of CN216954600U, and the main improvement point of the utility model is that when a user uses the detection device under the condition that the bottom surface is rain and snow, rain and snow and the like are not easy to flow into equipment, as shown in fig. 1 to 4, when the monitoring device of the cable-stayed bridge based on the fiber grating is used, firstly, the demodulator body 1 and a computer are taken to the position to be measured, after the weather of rain and snow or the weather of the rain and the snow is met, when the ground is rain and snow or muddy water and the like, the supporting plate 3 is turned down, the supporting assembly is turned over to the bottom surface of the demodulator body 1 again, the supporting assembly is turned over to the bottom surface of the demodulator body 1 in a triangular supporting mode, the heights of the demodulator body 1 and the ground are increased, and the components and the like are prevented from being damaged along the bottom surface of the demodulator body 1.

As shown in fig. 2 and 3, the support assembly comprises a long plate 4 and a short plate 5, the long plate 4 and the short plate 5 are rotatably connected, and the long plate 4 is hinged with the support plate 3. Divide into long board 4 and short board 5 with supporting component, can be like this according to the support demand, the distance between long board 4 and the short board 5 of rational adjustment to increase the area of support and the dynamics of supporting of demodulation appearance body 1 bottom surface again.

As shown in fig. 3, a storage groove 31 is formed at the joint of the support plate 3 and the long plate 4, and the long plate 4 and the short plate 5 are clamped with the storage groove 31. The accommodating groove 31 is provided, so that the long plate 4 and the short plate 5 can be accommodated in the accommodating groove, the occupied external space is reduced, and the accommodating groove can be limited by the clamping strip 7 and cannot easily slide down.

As shown in fig. 4, the baffle plate 2 and the support plate 3 are both rotatably connected to the demodulator body 1. The rotation connection can be realized by only turning over the demodulator body 1 when the demodulator body is needed, which is quick and convenient, and other modes such as clamping connection, bolt connection and the like can be used.

As shown in fig. 3, the limiting assembly comprises a clamping strip 7 and two limiting buckles 6, the bottom surfaces of the two limiting buckles 6 are connected with the supporting assembly, the inner wall of the clamping strip 7 is clamped with the two limiting buckles 6, and the bottom surface of the clamping strip 7 is connected with the baffle plate 2. Through the clamping strip 7 on the baffle plate 2 slides downwards and is connected with the two limit buckles 6, the two limit buckles 6 can be clamped at the same time, so that the baffle plate is not easy to shake and overturn.

As shown in fig. 4, a T-shaped sliding block 8 is fixedly connected to one side of the clamping strip 7, which is close to the baffle plate 2, a sliding groove 21 is formed in one side of the baffle plate 2, which is close to the clamping strip 7, and the T-shaped sliding block 8 is in sliding connection with the sliding groove 21. By arranging the T-shaped sliding block 8 to slide in the sliding groove 21, the movable track can be used for lifting and descending the clamping strip 7, and the clamping strip 7 can be limited to prevent falling from the baffle plate 2.

As shown in fig. 1 to 4, the rotation shafts of the baffle plate 2, the support plate 3 and the demodulator body 1, and the rotation shafts of the long plate 4 and the short plate 5 are damping rotation shafts. Through the characteristic of damping pivot, can overturn the angle that needs and can stop at any time according to the demand when baffle 2 and short board 5 are overturned.

It should be noted that all the above-mentioned fixing connections may be welded, bolted, glued or integrally formed, and the like, and are not particularly limited.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a monitoring devices of cable-stay bridge based on fiber grating, includes demodulator body (1) that can be connected with optic fibre, its characterized in that: one side of demodulation appearance body (1) is connected with baffle (2) and backup pad (3), and one side that backup pad (3) are close to demodulation appearance body (1) articulates there is supporting component, and supporting component's opposite side offsets with demodulation appearance body (1) bottom surface, and one side that baffle (2) are close to backup pad (3) is connected with spacing subassembly, and spacing subassembly's opposite side is connected with supporting component.

2. The monitoring device for a cable-stayed bridge based on fiber bragg gratings according to claim 1, wherein: the support assembly comprises a long plate (4) and a short plate (5), the long plate (4) is rotationally connected with the short plate (5), and the long plate (4) is hinged with the support plate (3).

3. The monitoring device for a cable-stayed bridge based on fiber bragg gratings according to claim 2, wherein: the junction of backup pad (3) and long board (4) has seted up accomodates groove (31), long board (4) and short board (5) all with accomodate groove (31) joint.

4. A monitoring device for a cable-stayed bridge based on fiber bragg gratings according to claim 1, 2 or 3, characterized in that: the baffle (2) and the supporting plate (3) are both rotationally connected with the demodulator body (1).

5. A monitoring device for a cable-stayed bridge based on fiber bragg gratings according to claim 1, 2 or 3, characterized in that: the limiting assembly comprises a clamping strip (7) and two limiting buckles (6), the bottom surfaces of the two limiting buckles (6) are connected with the supporting assembly, the inner wall of the clamping strip (7) is clamped with the two limiting buckles (6), and the bottom surface of the clamping strip (7) is connected with the baffle plate (2).

6. The monitoring device for a cable-stayed bridge based on fiber bragg gratings according to claim 5, wherein: one side of the clamping strip (7) close to the baffle plate (2) is fixedly connected with a T-shaped sliding block (8), one side of the baffle plate (2) close to the clamping strip (7) is provided with a sliding groove (21), and the T-shaped sliding block (8) is in sliding connection with the sliding groove (21).

7. A monitoring device for a cable-stayed bridge based on fiber bragg gratings according to claim 1, 2, 3 or 6, characterized in that: the rotating shafts of the baffle plate (2), the supporting plate (3) and the demodulator body (1) and the rotating shafts of the long plate (4) and the short plate (5) are damping rotating shafts.

8. The monitoring device for a cable-stayed bridge based on fiber bragg gratings according to claim 4, wherein: the rotating shafts of the baffle plate (2), the supporting plate (3) and the demodulator body (1) and the rotating shafts of the long plate (4) and the short plate (5) are damping rotating shafts.

9. The monitoring device for a cable-stayed bridge based on fiber bragg gratings according to claim 5, wherein: the rotating shafts of the baffle plate (2), the supporting plate (3) and the demodulator body (1) and the rotating shafts of the long plate (4) and the short plate (5) are damping rotating shafts.