Automatic monitoring device for continuous beam expansion of river-crossing bridge

Abstract

The utility model relates to the technical field of continuous beam monitoring, and discloses an automatic monitoring device for continuous beam expansion of a river-crossing bridge, which comprises a transverse supporting plate, vertical bars are detachably mounted at four corner ends of the transverse supporting plate, and a plurality of displacement type fixing structures are slidably mounted at the top of the transverse supporting plate. And a fiber grating sensor is detachably mounted on the displacement type fixing structure. According to the automatic monitoring device for the expansion of the continuous beam of the river-crossing bridge, the fiber grating sensors are detachably mounted on the displacement type fixing structure, the displacement type fixing structure is movably fixed on the transverse supporting plate, when each fiber grating sensor is mounted, drilling pre-embedded mounting is not needed, the drilling process is optimized, the working efficiency is improved, and the cost is reduced. Meanwhile, the distance between every two adjacent fiber grating sensors can be rapidly and accurately adjusted, repeated drilling operation is not needed when the sensors are repaired or replaced subsequently, the sensors can be directly disassembled, replaced and repaired, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of continuous beam monitoring technology, and in particular to an automated monitoring device for the expansion of continuous beams in cross-river bridges. Background Technology

[0002] With the rapid development of transportation infrastructure construction, health monitoring of long-span continuous beam structures such as river-crossing bridges is becoming increasingly important. Fiber optic grating sensors, due to their advantages such as resistance to electromagnetic interference, corrosion resistance, and distributed measurement, have become a core technology for monitoring parameters such as strain and temperature in bridge structures.

[0003] In existing technologies, multiple fiber optic grating sensors are typically installed by pre-embedding bolts at the bottom of the bridge and then fixed by drilling to achieve multi-point monitoring of continuous beams.

[0004] Each sensor installation requires independent drilling at the bottom of the bridge, and the position must be strictly calibrated to ensure data validity. For long-span bridges, a large number of drilling operations are time-consuming and labor-intensive. Especially in the high-altitude working environment of the bridge, the operation difficulty and safety risks are significantly increased, and the installation is complex and inefficient. Furthermore, the fixed method of pre-embedded bolts makes it difficult to flexibly adjust the sensor layout. If sensors need to be added or replaced later, drilling operations must be repeated, leading to increased maintenance costs. Utility Model Content

[0005] In view of the problem that each sensor installation requires an independent drilling operation at the bottom of the bridge, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide an automated monitoring device for the expansion of continuous beams in cross-river bridges, which aims to solve the problems of complex and inefficient sensor installation.

[0007] To solve the above technical problems, this utility model provides the following technical solution: an automated monitoring device for the expansion of a continuous beam of a cross-river bridge, including a horizontal support plate, vertical strips that can be detachably installed at the four corners of the horizontal support plate, multiple displacement-type fixing structures that are slidably installed on the top of the horizontal support plate, fiber optic grating sensors that are detachably installed on the displacement-type fixing structures, and fiber optic bodies that are installed at both ends of the fiber optic grating sensors.

[0008] The displacement-type fixing structure includes a translation bar that is slidably mounted on a horizontal support plate. Both sides of the top of the translation bar are fixed with a card seat. The top of the card seat has a semi-circular card groove that engages with the convex ring end of the fiber optic grating sensor. The top of the translation bar and located between the two card seats are detachably mounted with a U-shaped card frame for positioning the fiber optic grating sensor. A locking bolt is threaded onto the translation bar through a screw hole.

[0009] As an improved technical solution, guide rails are installed on both sides of the top of the horizontal support plate, and sliders that slide on the guide rails are installed on both sides of the bottom of the translation bar.

[0010] As an improved technical solution, a rubber block is bonded to the inner wall of the U-shaped card holder, and the outer wall of the fiber optic grating sensor abuts against the inner wall of the rubber block.

[0011] As an improved technical solution, two positioning grooves are provided on both sides of the top of the translation bar to engage with the U-shaped card holder, and the two positioning grooves are directly opposite the two corners of a U-shaped card holder.

[0012] As an improved technical solution, two threaded holes are provided on one side of the translation bar, and the threaded holes are connected to the positioning groove. The translation bar is threaded with locking bolts through the threaded holes. Fixing holes for the locking bolts are provided at both corners of the U-shaped bracket.

[0013] As an improved technical solution, scales are embedded on both sides of the horizontal support plate, and indicator blocks are fixed on both sides of the translation strip, with the indicator blocks pointing on the scales.

[0014] As an improved technical solution, two threaded holes are provided at both ends of the horizontal support plate. Hexagonal bolts are threaded onto the horizontal support plate through the threaded holes. Two circular holes for the hexagonal bolts to pass through are provided at the end of the vertical bar near the horizontal support plate. The horizontal support plate and the vertical bar are fixed together by the hexagonal bolts and the threaded holes.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are:

[0016] 1. This utility model, by using multiple locking bolts to abut against the horizontal support plate, limits the translation bar to a certain point on the top of the horizontal support plate. This prevents horizontal displacement during the monitoring process of the fiber Bragg grating sensor, ensuring the stability of the fiber Bragg grating sensor during detection. It also facilitates the adjustment of the spacing between two adjacent fiber Bragg grating sensors to adapt to different monitoring environments. At the same time, the translation bar moves and drives the indicator block to move as well. Based on the position of the two adjacent indicator blocks on the scale, it is easier to calculate the spacing between two adjacent fiber Bragg grating sensors, making it easier to adjust the installation position of the fiber Bragg grating sensor more accurately.

[0017] 2. In this utility model, the fiber Bragg grating sensor is clamped between the U-shaped bracket and the translation bar, which can prevent the fiber Bragg grating sensor from detaching from the semi-circular slot due to vibration, thus ensuring the firmness of the fiber Bragg grating sensor installation. At the same time, the rubber block protects the fiber Bragg grating sensor when it is clamped.

[0018] 3. In this utility model, the fiber Bragg grating sensor can be detachably installed on the displacement-type fixed structure, which is movably fixed on the horizontal support plate. When installing each fiber Bragg grating sensor, there is no need to drill holes for pre-embedding, which optimizes the drilling process and improves work efficiency. At the same time, the spacing between two adjacent fiber Bragg grating sensors can be adjusted quickly and accurately. Furthermore, when performing subsequent maintenance or replacement of sensors, there is no need to repeat drilling operations. They can be directly disassembled, replaced, and maintained, reducing maintenance costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the overall structure of an automated monitoring device for the expansion of a continuous beam in a cross-river bridge, according to this utility model.

[0021] Figure 2 This is a schematic diagram of the partial separation structure of the horizontal support plate and vertical bar of the automated monitoring device for the expansion of the continuous beam of a cross-river bridge according to this utility model.

[0022] Figure 3 This is a schematic diagram of the displacement-type fixed structure of an automated monitoring device for expanding the continuous beam of a cross-river bridge according to the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Horizontal support plate; 2. Fiber optic grating sensor; 3. Displacement type fixing structure; 31. Translation bar; 32. Indicator block; 33. Card holder; 34. Semi-circular card slot; 35. Fixing through hole; 36. Rubber block; 37. U-shaped card holder; 38. Positioning groove; 39. Locking bolt one; 310. Locking bolt two; 311. Threaded hole one; 4. Vertical bar; 5. Fiber optic body; 6. Scale; 7. Guide rail; 8. Slider; 9. Threaded hole two; 10. Hex bolt. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] Reference Figures 1-3This is the first embodiment of the present invention, which provides an automated monitoring device for the expansion of a continuous beam of a cross-river bridge. This automated monitoring device for the expansion of a continuous beam of a cross-river bridge includes a horizontal support plate 1. Vertical bars 4 are detachably installed at the four corners of the horizontal support plate 1. Multiple displacement-type fixing structures 3 are slidably installed on the top of the horizontal support plate 1. Fiber optic grating sensors 2 are detachably installed on the displacement-type fixing structures 3. Both ends of the fiber optic grating sensors 2 are provided with convex ring ends. Fiber optic bodies 5 are installed at both ends of the fiber optic grating sensors 2.

[0028] The displacement-type fixed structure 3 includes a translation bar 31 slidably mounted on the horizontal support plate 1. Both sides of the top of the translation bar 31 are fixed with a bracket 33, and the fiber Bragg grating sensor 2 is clamped between the two brackets 33. The top of the bracket 33 has a semi-circular groove 34 that engages with the protruding ring end of the fiber Bragg grating sensor 2. A U-shaped bracket 37 for positioning the fiber Bragg grating sensor 2 is detachably mounted on the top of the translation bar 31 and located between the two brackets 33. A locking bolt 39 is threaded onto the translation bar 31 through a screw hole, with the bottom end of the locking bolt 39 abutting against the top of the translation bar 31. The abutment between the multiple locking bolts 39 and the horizontal support plate 1 confines the translation bar 31 to a certain point on the top of the horizontal support plate 1, thus preventing horizontal displacement during monitoring by the fiber Bragg grating sensor 2, ensuring the stability of the fiber Bragg grating sensor 2 during detection, and facilitating adjustment of the spacing between adjacent fiber Bragg grating sensors 2 to adapt to different monitoring environments.

[0029] Guide rails 7 are installed on both sides of the top of the horizontal support plate 1, and sliders 8 that slide on the guide rails 7 are installed on both sides of the bottom of the translation bar 31.

[0030] A rubber block 36 is bonded to the inner wall of the U-shaped card holder 37, and the outer wall of the fiber optic grating sensor 2 abuts against the inner wall of the rubber block 36. The rubber block 36 provides protection for the fiber optic grating sensor 2 when it is clamped.

[0031] Two threaded holes 9 are provided at both ends of the horizontal support plate 1. Hexagonal bolts 10 are threadedly installed on the horizontal support plate 1 through the threaded holes 9. Two circular holes for the hexagonal bolts 10 to pass through are provided at the end of the vertical bar 4 near the horizontal support plate 1. The horizontal support plate 1 and the vertical bar 4 are fixed by the threaded connection between the hexagonal bolts 10 and the threaded holes 9. The vertical bar 4 is detachably connected by the threaded connection between the hexagonal bolts 10 and the threaded holes 9, which facilitates the removal or installation of the displacement type fixing structure 3 from the horizontal support plate 1.

[0032] During use, the fiber Bragg grating sensor 2 is detachably mounted on the displacement-type fixed structure 3, which is movably fixed on the horizontal support plate 1. When installing each fiber Bragg grating sensor 2, there is no need to drill holes for pre-embedding, which optimizes the drilling process and improves work efficiency. At the same time, the spacing between two adjacent fiber Bragg grating sensors 2 can be adjusted quickly and accurately. Furthermore, when performing subsequent maintenance or replacing the sensors, there is no need to repeat the drilling operation; they can be directly disassembled, replaced, or repaired, reducing maintenance costs.

[0033] Example 2

[0034] Reference Figures 2-3 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: two positioning grooves 38 are provided on both sides of the top of the translation bar 31 to engage with the U-shaped card holder 37, and the two positioning grooves 38 are directly opposite the two corners of a U-shaped card holder 37.

[0035] Two threaded holes 311 are provided on one side of the translation bar 31, and the threaded holes 311 are connected to the positioning groove 38. The translation bar 31 is threaded with locking bolts 310 through the threaded holes 311. Fixing holes 35 for the locking bolts 310 to pass through are provided at both corners of the U-shaped bracket 37.

[0036] Both sides of the horizontal support plate 1 are inlaid with scales 6, and both sides of the translation bar 31 are fixed with indicator blocks 32, and the indicator blocks 32 point on the scales 6. When the translation bar 31 moves, it will drive the indicator blocks 32 to move. Based on the position of the two adjacent indicator blocks 32 on the scales 6, it is easier to calculate the distance between the two adjacent fiber Bragg grating sensors 2, and it is easier to adjust the installation position of the fiber Bragg grating sensor 2 with greater accuracy.

[0037] During use, insert the two corners of the U-shaped bracket 37 into the positioning groove 38, screw the second locking bolt 310 into the threaded hole 311 and through the fixing hole 35, thus fixing the U-shaped bracket 37 onto the translation bar 31. Clamp the fiber optic grating sensor 2 between the U-shaped bracket 37 and the translation bar 31. This will prevent the fiber optic grating sensor 2 from coming off the semi-circular slot 34 due to vibration, ensuring the firmness of the fiber optic grating sensor 2 installation.

[0038] The remaining structure is the same as that in Example 1.

[0039] Based on embodiments 1-2, the working principle of this utility model is as follows: Before fixing the horizontal support plate 1 to the bottom of the bridge, an appropriate number of displacement-type fixing structures 3 are first installed on the horizontal support plate 1. The number of displacement-type fixing structures 3 is consistent with the number of fiber optic grating sensors 2 to be installed.

[0040] Then, by threading hex bolts 10 through the central hole and threaded hole 9 on the vertical bar 4, the vertical bar 4 and the horizontal support plate 1 are detachably connected together. Then, the vertical bars 4 on both sides are fixed to the two sides of the bridge, thus completing the fixing of the horizontal support plate 1 to the bottom of the bridge.

[0041] The translation bar 31 is slidably connected to the guide rail 7 via the slider 8, enabling the translation bar 31 to move on the horizontal support plate 1. The translation bar 31 can be arbitrarily moved on the horizontal support plate 1. After the movement is completed, the locking bolt 39 is rotated and driven by the threaded transmission between the bolt and the threaded hole on the translation bar 31, causing the tail end of the locking bolt 39 to move in the direction of 11 and come closest to the top of the horizontal support plate 1.

[0042] The process of fixing the fiber Bragg grating sensor 2 to the displacement-type fixing structure 3 is as follows:

[0043] Place the two protruding ring ends on the fiber Bragg grating sensor 2 into the corresponding two semi-circular slots 34, then insert the two corners of the U-shaped bracket 37 into the positioning slot 38, screw the second locking bolt 310 into the threaded hole 311 and through the fixing hole 35, then fix the U-shaped bracket 37 on the translation bar 31, and clamp the fiber Bragg grating sensor 2 between the U-shaped bracket 37 and the translation bar 31.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An automatic monitoring device for the enlargement of a continuous beam of a river-crossing bridge, comprising a cross-carrier plate (1), characterized in that: Four corners of the horizontal supporting plate (1) are detachably installed with vertical bars (4), the top of the horizontal supporting plate (1) is slidably installed with a plurality of displacement type fixing structures (3), the displacement type fixing structure (3) is detachably installed with a fiber grating sensor (2), and both ends of the fiber grating sensor (2) are installed with fiber bodies (5). The displacement type fixing structure (3) comprises a translation bar (31) slidably installed on the horizontal supporting plate (1), both sides of the top of the translation bar (31) are fixed with clamping seats (33), the top of the clamping seat (33) is provided with a semicircular clamping groove (34) matched with the protruding ring end of the fiber grating sensor (2), the top of the translation bar (31) and between the two clamping seats (33) are detachably installed with a U-shaped clamping frame (37) for positioning the fiber grating sensor (2), and the translation bar (31) is threadedly installed with a locking bolt (39) through the screw hole formed in the translation bar (31). 2.The automatic monitoring device for the expansion of a continuous beam of a river-crossing bridge according to claim 1, wherein: Both sides of the top of the horizontal supporting plate (1) are installed with guide rails (7), and both sides of the bottom of the translation bar (31) are installed with sliding blocks (8) sliding on the guide rails (7). 3.The automatic monitoring device for the expansion of a continuous beam of a river-crossing bridge according to claim 2, wherein: The inner wall surface of the U-shaped clamping frame (37) is bonded with a rubber block (36), and the outer wall surface of the fiber grating sensor (2) abuts against the inner wall surface of the rubber block (36).

4. The automatic monitoring device for the expansion of a continuous beam of a river-crossing bridge according to claim 3, characterized in that: Both sides of the top of the translation bar (31) are provided with two positioning grooves (38) matched with the U-shaped clamping frame (37), and the two positioning grooves (38) are opposite to the two corner ends of the U-shaped clamping frame (37).

5. The automatic monitoring device for the expansion of a continuous beam of a river-crossing bridge according to claim 4, characterized in that: One side of the translation bar (31) is provided with two screw holes (311) in communication with the positioning grooves (38), and the translation bar (31) is threadedly installed with a locking bolt (310) through the screw holes (311), and both corner ends of the U-shaped clamping frame (37) are provided with fixed perforations (35) for the locking bolt (310) to pass through.

6. The automatic monitoring device for the expansion of a continuous beam of a river-crossing bridge according to claim 5, characterized in that: Both sides of the horizontal supporting plate (1) are embeddedly installed with scale rulers (6), both sides of the translation bar (31) are fixed with indicating blocks (32), and the indicating blocks (32) are indicated on the scale rulers (6).

7. The automatic monitoring device for the expansion of a continuous beam of a river-crossing bridge according to claim 6, characterized in that: Both ends of both sides of the horizontal supporting plate (1) are provided with two screw holes (9), the horizontal supporting plate (1) is threadedly installed with hexagonal bolts (10) through the screw holes (9), one end of the vertical bar (4) close to the horizontal supporting plate (1) is provided with two circular holes for the hexagonal bolts (10) to pass through, and the horizontal supporting plate (1) and the vertical bar (4) are fixed by the hexagonal bolts (10) and the screw holes (9) in threaded connection.

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