A strain gauge detector for bridge health monitoring

Abstract

The utility model discloses a strain amount detector for bridge health monitoring, the utility model discloses a fiber bragg grating strain sensor main part, mounting seat, fastening plate and fixed component, the mounting seat places the rear side of fiber bragg grating strain sensor main part, is equipped with two limit grooves on the mounting seat, the fastening plate is fixedly connected through the hinge with the mounting seat, is equipped with two limit holes on the fastening plate, the fixed component includes the fixed seat of fixed setting in the outside of mounting seat, the rotation hole of setting on the fixed seat, the rotating support of being inserted in the rotation hole, the fixed plate of screw connection with the rotating support, the limit rod of being inserted on the rotating support and the spring of fixed setting on the limit rod. The utility model discloses a mounting seat, fastening plate and fixed component are set up, have realized quick -release type, so that maintenance, can avoid lightning through setting first insulating spacer and second insulating spacer.

Description

Technical Field

[0001] This utility model relates to the field of bridge health monitoring technology, specifically a strain detector for bridge health monitoring. Background Technology

[0002] In bridge health monitoring systems, strain detectors (such as fiber optic strain sensors, resistance strain gauges, and vibrating wire sensors) are core equipment used to monitor strain changes in bridge structures in real time and assess their stress state and potential damage. Among them, fiber optic strain sensors work on the principle that the grating wavelength changes with strain, and have advantages such as resistance to electromagnetic interference, long-distance transmission, and high durability. They are usually used in conjunction with mounting bases and installed on bridges. However, fiber optic strain sensors are fixed to the mounting base with screws, which makes them difficult to disassemble and increases the difficulty of maintenance, thus having certain shortcomings. To address these shortcomings, we propose a strain detector for bridge health monitoring. Utility Model Content

[0003] The present invention aims to solve the problems existing in the prior art or related technologies.

[0004] Therefore, the technical solution adopted by this utility model is as follows: a strain detector for bridge health monitoring, comprising a fiber optic strain sensor body, a mounting base, a fastening plate, and a fixing assembly. The mounting base is placed on the rear side of the fiber optic strain sensor body, and two limiting grooves are provided on the mounting base. The fastening plate is fixedly connected to the mounting base by a hinge, and two limiting holes are provided on the fastening plate. The fixing assembly includes a fixing base fixedly disposed on the outside of the mounting base, a rotating hole provided on the fixing base, a rotating frame inserted into the rotating hole, a fixing plate connected to the rotating frame by screws, a limiting rod inserted into the rotating frame, and a spring fixedly disposed on the limiting rod.

[0005] Preferably, the mounting base has mounting holes, both of which are round holes, and the front end of the mounting base has a first slot.

[0006] Preferably, the fastening plate has a second slot.

[0007] Preferably, a stop block is fixedly provided on the rotating frame, and a through hole for installing a limiting rod is provided on the rotating frame, and the rear edge of the limiting rod is provided with a rounded corner.

[0008] Preferably, there are two fixing components, and the two fixing components correspond one-to-one with the limiting holes.

[0009] Preferably, it further includes a first insulating pad, which is snapped into the mounting base via a first slot.

[0010] Preferably, it also includes a second insulating pad, which is snapped into connection with the fastening plate via a second slot.

[0011] By adopting the above technical solution, the beneficial effects achieved by this utility model are as follows: The spring of the fixing component in this utility model has a certain elastic potential energy, which can pull the limiting rod outward until the limiting rod is completely disengaged from the limiting groove and the limiting hole. After disengagement, the rotating frame can be rotated to a suitable angle. At this time, the fixing component can not block the fastening plate, and the fastening plate can be rotated open. After opening, the fiber optic strain sensor body can be directly removed, achieving the effect of quick disassembly, saving time and effort, and avoiding the problem of loosening caused by rust of traditional screws. The fixing plate and the rotating frame can be disassembled and separated for maintenance. The first insulating gasket and the second insulating gasket can wrap around the fiber optic strain sensor body, which improves the fixing effect on the one hand and provides insulation on the other hand, preventing the lightning strike induced current from being conducted to the fiber optic strain sensor through the metal mounting base. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This utility model Figure 1 Schematic diagram of the middle mounting base;

[0014] Figure 3 This utility model Figure 1 Schematic diagram of the central fastening plate;

[0015] Figure 4 This utility model Figure 1 Schematic diagram of the structure of the fixed component;

[0016] Figure 5 This utility model Figure 4 A schematic diagram of the transfer frame and the fixing plate.

[0017] Figure label:

[0018] 100. Main body of fiber optic strain sensor;

[0019] 200. Mounting base; 201. Mounting hole; 202. Limiting groove; 203. First slot;

[0020] 300. Fastening plate; 301. Limiting hole; 302. Second slot;

[0021] 400. Fixing component; 401. Fixing base; 4011. Rotary hole; 402. Rotating bracket; 4021. Stop block; 4022. Through hole; 403. Fixing plate; 404. Limiting rod; 405. Rounded corner; 406. Spring;

[0022] 500. First insulating pad;

[0023] 600. Second insulating pad. Detailed Implementation

[0024] 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 specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0025] The following describes some embodiments of the present invention with reference to the accompanying drawings, providing a strain detector for bridge health monitoring.

[0026] Example 1:

[0027] Reference Figure 1-5 This is the first embodiment of the present invention. This embodiment provides a strain detector for bridge health monitoring, including a fiber optic strain sensor body 100, a mounting base 200, a fastening plate 300, and a fixing component 400.

[0028] Specifically, the mounting base 200 is placed on the rear side of the fiber optic strain sensor body 100. The mounting base 200 has two limiting grooves 202 and mounting holes 201, both of which are round holes. The front end of the mounting base 200 has a first slot 203. In use, the fiber optic strain sensor body 100 can be fixed on the bridge through the mounting base 200, and the two limiting grooves 202 can be used in conjunction with two fixing components 400 to fix the fastening plate 300 on the mounting base 200.

[0029] Specifically, the fastening plate 300 is fixedly connected to the mounting base 200 via a hinge. The fastening plate 300 has two limiting holes 301 and a second slot 302. In use, the fastening plate 300 can cover the mounting base 200 to fix the fiber optic strain sensor body 100 on the mounting base 200. The two limiting holes 301 serve as limiting holes so that the fixing assembly 400 can fix the fastening plate 300. Then, the second insulating gasket 600 can be easily fixed to the fastening plate 300 for use.

[0030] Specifically, the fixing assembly 400 includes a fixing base 401 fixedly disposed on the outside of the mounting base 200, a rotating hole 4011 opened in the fixing base 401, a rotating frame 402 inserted into the rotating hole 4011, a fixing plate 403 screwed to the rotating frame 402, a limiting rod 404 inserted into the rotating frame 402, and a spring 406 fixedly disposed on the limiting rod 404. A stop block 4021 is fixedly disposed on the rotating frame 402, and a through hole 4022 for installing the limiting rod 404 is opened on the rotating frame 402. A rounded corner 405 is provided at the rear edge of the limiting rod 404. Two fixing assemblies 400 are provided. The fixing component 400 corresponds one-to-one with the limiting hole 301. In use, the rotating frame 402 can be fixed on the fixing base 401 by the fixing plate 403. After fixing, the rotating frame 402 can rotate on the fixing base 401. The limiting rod 404 can be moved by the spring 406 so that the limiting rod 404 can be inserted into the limiting hole 301 and the limiting groove 202, thus fixing the fastening plate 300 on the mounting base 200. Then, the stop block 4021 plays a blocking role so that the rotating frame 402 can be fixed on the fixing base 401. The rounded corner 405 allows the limiting rod 404 to be quickly inserted into the limiting hole 301 for use.

[0031] Example 2:

[0032] Reference Figure 2 and 3 This is the second embodiment of the present invention, which differs from the first embodiment in that it further includes a first insulating gasket 500 and a second insulating gasket 600. The first insulating gasket 500 is snapped into the mounting base 200 via a first slot 203, and the second insulating gasket 600 is snapped into the fastening plate 300 via a second slot 302. In use, the first insulating gasket 500 provides insulation between the mounting base 200 and the fiber Bragg grating strain sensor body 100, while the second insulating gasket 600 provides insulation between the fastening plate 300 and the fiber Bragg grating strain sensor body 100, thus preventing lightning strike induced current from being conducted to the fiber Bragg grating strain sensor through the metal mounting base 200 and the fastening plate 300.

[0033] The working principle and usage procedure of this utility model are as follows: First, insert the first insulating pad 500 into the first slot 203. Then, insert the second insulating pad 600 into the second slot 302. After insertion, place the fiber optic strain sensor body 100 into the first insulating pad 500. Next, rotate the fastening plate 300 until it covers the fiber optic strain sensor body 100. After covering, pull the limiting rod 404 outwards until the limiting rod 404 no longer obstructs the mounting base 200 and the fastening plate 300. Then, rotate the rotating frame 402 until the limiting rod 404 is aligned with the limiting hole 301, and then release the limiting rod 404. After release, the limiting rod 404 can be inserted into the limiting hole 301 and the limiting groove 202, which can fix the fastening plate 300 on the mounting base 200. When disassembling, the limiting rod 404 can be pulled outward directly until the limiting rod 404 is completely disengaged from the limiting hole 301. Then rotate the rotating frame 402 until it no longer obstructs the fastening plate 300. Finally, rotate the fastening plate 300 directly to remove the fiber optic strain sensor body 100.

[0034] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A strain variable detector for bridge health monitoring, characterized in that, include: Fiber grating strain sensor body (100); The mounting base (200) is placed on the rear side of the fiber optic strain sensor body (100), and the mounting base (200) has two limiting grooves (202); The fastening plate (300) is fixedly connected to the mounting base (200) by a hinge, and the fastening plate (300) has two limiting holes (301); The fixing assembly (400) includes a fixing base (401) fixedly disposed on the outside of the mounting base (200), a rotating hole (4011) opened on the fixing base (401), a rotating frame (402) inserted into the rotating hole (4011), a fixing plate (403) screwed to the rotating frame (402), a limiting rod (404) inserted into the rotating frame (402), and a spring (406) fixedly disposed on the limiting rod (404).

2. The strain variable detector for bridge health monitoring according to claim 1, characterized in that, The mounting base (200) has mounting holes (201), both of which are round holes, and the front end of the mounting base (200) has a first slot (203).

3. The strain detector for bridge health monitoring according to claim 1, characterized in that, The fastening plate (300) is provided with a second slot (302).

4. A strain variable detector for bridge health monitoring according to claim 1, characterized in that, A stop block (4021) is fixedly installed on the rotating frame (402), and a through hole (4022) for installing a limiting rod (404) is opened on the rotating frame (402). The rear edge of the limiting rod (404) is provided with a rounded corner (405).

5. A strain variable detector for bridge health monitoring according to claim 1, characterized in that, Two fixing components (400) are provided, and the two fixing components (400) correspond one-to-one with the limiting hole (301).

6. A strain variable detector for bridge health monitoring according to claim 1, characterized in that, It also includes a first insulating pad (500), which is snapped into the mounting base (200) via a first slot (203).

7. A strain variable detector for bridge health monitoring according to claim 1, characterized in that, It also includes a second insulating pad (600), which is snapped into connection with the fastening plate (300) via a second slot (302).

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