A mounting device for a fiber grating sensor at a reinforcing bar

Abstract

The utility model relates to box type roadbed construction technical field, concretely discloses a kind of installation device of fiber grating sensor at reinforcing bar place. It includes device main body, device main body includes the connecting piece being arranged at the both ends of fiber grating sensor, connecting piece is used to connect fiber grating sensor with reinforcing bar;Connecting piece includes connecting rod, and the both ends of connecting rod are equipped with the first clamp hoop component for connecting reinforcing bar;2 first clamp hoop component between is equipped with the second clamp hoop component for connecting fiber grating sensor with connecting rod;First clamp hoop component and second clamp hoop component are rotatably connected with connecting rod. Can make fiber grating sensor more stable, and will not occur deviation or slack.

Description

Technical Field

[0001] This utility model relates to the field of box-type roadbed construction technology, specifically to an installation device for a fiber optic grating sensor at a reinforcing bar. Background Technology

[0002] Fiber Bragg grating (FBG) sensors are tied to reinforcing bars during box girder construction, primarily to monitor the health of the reinforcing structure in real time. Currently, construction workers typically tie the FBG sensors to the reinforcing bars using nylon strapping. However, because the FBG sensors are tied to the reinforcing bars with nylon strapping, slippage or loosening can easily occur at the contact surfaces between the FBG sensor, the reinforcing bars, and the nylon strapping. This prevents the true strain of the reinforcing bars from being fully transmitted to the optical fiber, thus reducing the measurement accuracy of the FBG sensor. To prevent slippage and loosening, construction workers tend to tie the FBG sensors even tighter. However, this can cause the strapping points to compress the optical fiber, potentially damaging the sensor. Utility Model Content

[0003] This invention provides a device for installing a fiber optic grating sensor on a reinforcing bar, which can overcome some or all of the defects of the prior art.

[0004] According to the present invention, an installation device for a fiber optic grating sensor at a reinforcing bar includes: a device body, the device body including connectors disposed at both ends of the fiber optic grating sensor, the connectors being used to connect the fiber optic grating sensor and the reinforcing bar; the connectors including a connecting rod, both ends of the connecting rod being provided with first clamp assemblies for connecting the reinforcing bar; a second clamp assembly for connecting the fiber optic grating sensor and the connecting rod being disposed between the two first clamp assemblies; both the first clamp assembly and the second clamp assembly being rotatably connected to the connecting rod.

[0005] With this invention, when installing the main body of the device, the construction worker first opens the second clamps on the two connecting parts, then clamps the opened second clamps at both ends of the fiber Bragg grating sensor. After the second clamps are clamped, the two second retaining rings are connected by bolts to fix the second clamps to both ends of the fiber Bragg grating sensor. Next, the construction worker rotates the two connecting rods along the second sleeve until both connecting rods form a 90-degree angle with the fiber Bragg grating sensor. Then, the construction worker opens the first clamp at one end of the guide plate, clamping the first clamps at both ends of the connecting rods onto the reinforcing bars, thereby fixing the fiber Bragg grating sensor between the two reinforcing bars. This sensor is used to detect the overall deformation between the two reinforcing bars, reflecting the macroscopic strain of the structure in that area. The two connecting parts allow the fiber Bragg grating sensor to be stably fixed between the two reinforcing bars, which is more efficient than binding with nylon tape. The fixed design ensures greater stability of the fiber Bragg grating sensor, preventing displacement or loosening. When fixing the fiber Bragg grating sensor to a single rebar, the worker can first rotate the two connecting rods until they form a 0-degree angle with the sensor, aligning them on a straight line. This process is repeated to open the first clamp and connect it to the rebar. Compared to existing technologies, this first clamp fixes the fiber Bragg grating sensor to the rebar without the need for nylon strapping, preventing contact between the sensor and the rebar and avoiding damage caused by nylon strapping. While nylon strapping requires tightening to prevent the sensor from falling, this increases pressure at the contact point between the sensor and the rebar, potentially damaging the sensor.

[0006] Preferably, both ends of the connecting rod are provided with guide grooves arranged along the length of the connecting rod, and the cross-section of the guide groove is T-shaped; one end of the guide groove is provided with an opening; a guide plate is provided in the guide groove along the length of the guide groove, one end of the guide plate extends out of the opening, and the end of the guide plate extending out of the opening is rotatably connected to the first clamp assembly; a fixing pin is provided at the end of the guide plate away from the first clamp assembly, and the fixing pin is used to fix the guide plate in the guide groove.

[0007] With this invention, when construction workers fix the fiber optic grating sensor between two steel bars, they can pull the guide plate according to the spacing between the two steel bars, causing the guide plate to move along the guide groove, thereby lengthening the connecting rod and enabling the connecting rod to adapt to steel bars with different spacing. After the guide plate is moved to the designated position, the construction workers can rotate the handle on the fixing pin to rotate the threaded column, which extends into the first threaded hole on the guide plate until the lower end of the threaded column abuts against the bottom surface of the guide groove, thereby fixing the guide plate and preventing it from detaching from the guide groove.

[0008] Preferably, the fixing pin includes a threaded post, one end of which is provided with a baffle, and the guide plate is provided with a first threaded hole that mates with the threaded post.

[0009] With this invention, the threaded column rotates through the first threaded hole and abuts against the bottom surface of the guide groove. The threaded column continues to move downwards, lifting the guide plate and pressing it against the upper side wall of the guide groove to prevent the guide plate from moving.

[0010] Preferably, the end of the baffle away from the threaded post is provided with a handle.

[0011] With this invention, construction workers can rotate the threaded column by turning the handle, making it convenient for them to rotate the threaded column.

[0012] Preferably, the first clamp assembly includes a first connecting seat and a first clamp. The first connecting seat includes a circular plate, and a first sleeve is provided at one end face of the circular plate. The first sleeve has a first internal thread inside. The first clamp includes two first retaining rings in a semi-circular shape, and the two first retaining rings are hinged to the other end face of the first clamp. A first through hole is provided at the guide plate for the first sleeve to pass through, and a first bolt that is threadedly connected to the first sleeve is provided at the end of the guide plate away from the circular plate.

[0013] With this invention, construction workers can rotate the first connecting seat along the first sleeve by pushing the first clamp. When it is necessary to bind the fiber optic grating sensor between two steel bars or on one steel bar, the construction workers can rotate the first connecting seat according to different binding methods to adjust the position of the two first retaining rings, so that the steel bar can pass through the two first retaining rings. The length of the first sleeve is longer than the depth of the first through hole. After the first bolt enters the first sleeve, the nut of the first bolt does not contact the guide plate, preventing the first bolt from affecting the rotation of the first connecting seat.

[0014] Preferably, the second clamp assembly includes a second connecting seat and a second clamp. The second connecting seat includes a mounting block, a second sleeve is provided at one end face of the mounting block, and a second internal thread is provided inside the second sleeve. A second through hole is provided at the connecting rod for the second sleeve to pass through. A second bolt is provided at the end of the connecting rod away from the mounting block and threadedly connected to the second sleeve. The second clamp includes two second retaining rings in a semi-circular shape, and the two second retaining rings are hinged to one end face of the mounting block.

[0015] With this invention, construction workers can push the connecting rod to rotate along the second sleeve and adjust the rotation angle of the connecting rod, so that the connecting rod can connect the fiber optic grating sensor between two steel bars or on a single steel bar. The length of the second sleeve is longer than the depth of the second through hole. When the second bolt is inserted into the second sleeve, the nut of the second bolt does not contact the connecting rod, thereby preventing the nut of the second bolt from affecting the rotation of the connecting rod.

[0016] Preferably, a first stop block is provided between the two first retaining rings and is fixedly connected to the circular plate.

[0017] With this invention, when the two first retaining rings are tied together on the reinforcing bar, the part of the first retaining ring near the hinge end of the first retaining ring will press against the first stop block, thereby preventing the first retaining ring from shaking even when the two first retaining rings are clamping the reinforcing bar due to instability of the hinge end of the first retaining ring.

[0018] Preferably, a second stop block is provided between the two second retaining rings and is fixedly connected to the mounting block.

[0019] With this invention, when the two second retaining rings are combined and bound to the fiber Bragg grating sensor, the part of the second retaining ring near the hinge end of the second retaining ring will press against the second stop block, thereby preventing the second retaining ring from shaking even when the two second retaining rings are clamping the fiber Bragg grating sensor and the hinge end of the second retaining ring is unstable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the connection between the main body of the device and the fiber optic grating sensor in Example 1.

[0021] Figure 2 This is a schematic diagram of the fiber Bragg grating sensor in Example 1.

[0022] Figure 3 This is a schematic diagram of the front of the connector in Example 1.

[0023] Figure 4 This is a schematic diagram of the back of the connector in Example 1.

[0024] Figure 5 This is an exploded view of the connector in Example 1.

[0025] Figure 6 This is a schematic diagram of the second clamp assembly in Example 1.

[0026] Figure 7 This is a schematic diagram of the first clamp assembly in Example 1.

[0027] Figure 8 This is a schematic diagram of the fixing pin in Example 1. Detailed Implementation

[0028] To further understand the content of this utility model, a detailed description of the utility model is provided in conjunction with the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the utility model.

[0029] Example 1 like Figure 1-8As shown, this embodiment provides an installation device for a fiber Bragg grating sensor at a rebar, including a device body 100. The device body 100 includes connectors 120 disposed at both ends of a fiber Bragg grating sensor 130, which are used to connect the fiber Bragg grating sensor 130 to the rebar. The connectors 120 include a connecting rod 320, and both ends of the connecting rod 320 are provided with first clamping assemblies 340 for connecting the rebar. A second clamping assembly 310 for connecting the fiber Bragg grating sensor 130 and the connecting rod 320 is disposed between the two first clamping assemblies 340. Both the first clamping assemblies 340 and the second clamping assemblies 310 are rotatably connected to the connecting rod 320.

[0030] In this embodiment, when installing the main body 100 of the device, the construction personnel first open the second clamps 510 on the two connectors 120 respectively, and then clamp the opened second clamps 510 onto both ends of the fiber optic grating sensor 130. After the second clamps 510 are clamped, the two second retaining rings are connected by bolts to fix the second clamps 510 to both ends of the fiber optic grating sensor 130. Then, the construction personnel rotate the two connecting rods 320, causing the two connecting rods 320 to rotate along the second sleeve 620 until the two connecting rods 320 rotate. The guide plate 330 is positioned at a 90-degree angle to the fiber optic grating sensor 130. Then, the construction worker opens the first clamp 530 at one end of the guide plate 330, clamping the first clamps 530 at both ends of the connecting rod 320 onto the reinforcing bars. This fixes the fiber optic grating sensor 130 between the two reinforcing bars, allowing it to detect the overall deformation between them, such as tension, compression, or bending, reflecting the macroscopic strain of the structure in that area. Two connectors 120 ensure the fiber optic grating sensor 130 is stably fixed between the two reinforcing bars, similar to the method using nylon strapping. By fixing it with connector 120, the fiber Bragg grating sensor 130 becomes more stable and will not shift or loosen. When the construction worker fixes the fiber Bragg grating sensor 130 to a single rebar, the worker can first rotate the two connecting rods 320 until the angle between the two connecting rods 320 and the fiber Bragg grating sensor 130 is 0 degrees, so that the two connecting rods 320 and the fiber Bragg grating sensor 130 are on the same straight line. Then, the above steps are repeated to open the first clamp 530 and connect the first clamp 530 to the single rebar. Compared with the existing technology, the fiber Bragg grating sensor 130 is fixed to the rebar by the first clamp 530 without the need for nylon strapping. This eliminates the need for the fiber Bragg grating sensor 130 to contact the rebar, avoiding damage caused by nylon strapping. While construction workers need to tighten the strapping to prevent the fiber Bragg grating sensor 130 from falling, tightening the strapping increases the pressure at the contact point between the fiber Bragg grating sensor 130 and the rebar, which can easily damage the fiber Bragg grating sensor 130.

[0031] In this embodiment, both ends of the connecting rod 320 are provided with guide grooves 420 arranged along the length direction of the connecting rod 320, and the cross-section of the guide grooves 420 is T-shaped; one end of the guide grooves 420 is provided with an opening 540; a guide plate 330 is provided in the guide grooves 420 along the length direction of the guide grooves 420, one end of the guide plate 330 extends out of the opening 540, and the end of the guide plate 330 extending out of the opening 540 is rotatably connected to the first clamp assembly 340; a fixing pin 410 is provided at the end of the guide plate 330 away from the first clamp assembly 340, and the fixing pin 410 is used to fix the guide plate 330 in the guide grooves 420.

[0032] In this embodiment, when the construction worker fixes the fiber optic grating sensor 130 between two reinforcing bars, the guide plate 330 can be pulled according to the spacing between the two reinforcing bars, causing the guide plate 330 to move along the guide groove 420, thereby lengthening the connecting rod 320 so that the connecting rod 320 can adapt to reinforcing bars with different spacing. After the guide plate 330 is moved to the designated position, the construction worker rotates the handle 830 on the fixing pin 410, thereby causing the threaded post 820 to rotate. The threaded post 820 extends into the first threaded hole 580 on the guide plate 330 until the lower end of the threaded post 820 abuts against the bottom surface of the guide groove 420, thereby fixing the guide plate 330 and preventing the guide plate 330 from falling out of the guide groove 420.

[0033] In this embodiment, the fixing pin 410 includes a threaded post 820, one end of which is provided with a baffle 810, and the guide plate 330 is provided with a first threaded hole 580 that mates with the threaded post 820.

[0034] In this embodiment, the threaded post 820 rotates through the first threaded hole 580 and abuts against the bottom surface of the guide groove 420. The threaded post 820 continues to move downwards, lifting the guide plate 330 and pressing it against the upper side wall of the guide groove 420 to prevent the guide plate 330 from moving.

[0035] In this embodiment, a handle 830 is provided at the end of the baffle 810 away from the threaded post 820.

[0036] In this embodiment, the construction worker can rotate the threaded post 820 by turning the handle 830, which makes it convenient for the construction worker to rotate the threaded post 820.

[0037] In this embodiment, the first clamp assembly 340 includes a first connecting seat 550 and a first clamp 530. The first connecting seat 550 includes a circular plate 710, and a first sleeve 720 is provided at one end face of the circular plate 710. The first sleeve 720 has a first internal thread inside. The first clamp 530 includes two first retaining rings in a semi-circular shape. The two first retaining rings are hinged to the other end face of the first clamp 530. The guide plate 330 has a first through hole 560 for the first sleeve 720 to pass through. The end of the guide plate 330 away from the circular plate 710 has a first bolt 430 that is threadedly connected to the first sleeve 720.

[0038] In this embodiment, by pushing the first clamp 530, the construction worker can rotate the first connecting seat 550 along the first sleeve 720. When it is necessary to bind the fiber optic grating sensor 130 between two steel bars or to one steel bar, the construction worker can rotate the first connecting seat 550 according to different binding methods to adjust the position of the two first retaining rings, so that the steel bar can pass through the two first retaining rings. The length of the first sleeve 720 is longer than the depth of the first through hole 560. After the first bolt 430 enters the first sleeve 720, the nut of the first bolt 430 does not contact the guide plate 330, so as to prevent the first bolt 430 from affecting the rotation of the first connecting seat 550.

[0039] In this embodiment, the second clamp assembly 310 includes a second connecting seat 590 and a second clamp 510. The second connecting seat 590 includes a mounting block 610. A second sleeve 620 is provided at one end face of the mounting block 610, and a second internal thread is provided inside the second sleeve 620. A second through hole 520 is provided at the connecting rod 320 for the second sleeve 620 to pass through. A second bolt 570 is provided at the end of the connecting rod 320 away from the mounting block 610 and is threadedly connected to the second sleeve 620. The second clamp 510 includes two second retaining rings in a semi-circular shape, and the two second retaining rings are hinged to one end face of the mounting block 610.

[0040] In this embodiment, the construction worker pushes the connecting rod 320 to rotate it along the second sleeve 620, adjusting the rotation angle of the connecting rod 320 so that the connecting rod 320 can connect the fiber optic grating sensor 130 between two steel bars or to a single steel bar. The length of the second sleeve 620 is longer than the depth of the second through hole 520. When the second bolt 570 is inserted into the second sleeve 620, the nut of the second bolt 570 does not contact the connecting rod 320, thereby preventing the nut of the second bolt 570 from affecting the rotation of the connecting rod 320.

[0041] In this embodiment, a first stop 730 is provided between the two first retaining rings and is fixedly connected to the circular plate 710.

[0042] In this embodiment, when the two first retaining rings are tied together on the reinforcing bar, the part of the first retaining ring near the hinge end of the first retaining ring will press against the first stop 730, thereby preventing the first retaining ring from shaking even when the two first retaining rings are clamping the reinforcing bar because the hinge end of the first retaining ring is unstable.

[0043] In this embodiment, a second stop 630 is provided between the two second retaining rings and is fixedly connected to the mounting block 610.

[0044] In this embodiment, when the two second retaining rings are tied together on the fiber Bragg grating sensor 130, the part of the second retaining ring near the hinge end of the second retaining ring will press against the second stop 630, thereby preventing the second retaining ring from shaking even when the two second retaining rings are clamping the fiber Bragg grating sensor 130 and the hinge end of the second retaining ring is unstable.

[0045] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

[0046] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited to this. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for mounting a fiber Bragg grating sensor at a reinforcing steel bar, characterized in that: The device includes a main body (100), which includes connectors (120) disposed at both ends of a fiber Bragg grating sensor (130). The connectors (120) are used to connect the fiber Bragg grating sensor (130) and the reinforcing bar. The connectors (120) include a connecting rod (320), and both ends of the connecting rod (320) are provided with first clamping assemblies (340) for connecting the reinforcing bar. A second clamping assembly (310) for connecting the fiber Bragg grating sensor (130) and the connecting rod (320) is disposed between the two first clamping assemblies (340). Both the first clamping assembly (340) and the second clamping assembly (310) are rotatably connected to the connecting rod (320).

2. The installation device for a fiber optic grating sensor at a reinforcing bar according to claim 1, characterized in that: Both ends of the connecting rod (320) are provided with guide grooves (420) arranged along the length direction of the connecting rod (320), and the cross-section of the guide grooves (420) is T-shaped; one end of the guide grooves (420) is provided with an opening (540); a guide plate (330) is provided in the guide grooves (420) along the length direction of the guide grooves (420), one end of the guide plate (330) extends out of the opening (540), and the end of the guide plate (330) extending out of the opening (540) is rotatably connected to the first clamp assembly (340); a fixing pin (410) is provided at the end of the guide plate (330) away from the first clamp assembly (340), and the fixing pin (410) is used to fix the guide plate (330) in the guide grooves (420).

3. The installation device for a fiber optic grating sensor at a reinforcing steel bar according to claim 2, characterized in that: The fixing pin (410) includes a threaded post (820), a baffle (810) is provided at one end of the threaded post (820), and a first threaded hole (580) is provided at the guide plate (330) to cooperate with the threaded post (820).

4. The installation device for a fiber optic grating sensor at a reinforcing steel bar according to claim 3, characterized in that: A handle (830) is provided at the end of the baffle (810) away from the threaded post (820).

5. The installation device for a fiber optic grating sensor at a reinforcing steel bar according to claim 4, characterized in that: The first clamp assembly (340) includes a first connecting seat (550) and a first clamp (530). The first connecting seat (550) includes a circular plate (710). A first sleeve (720) is provided at one end face of the circular plate (710). The first sleeve (720) is provided with a first internal thread. The first clamp (530) includes two first retaining rings in a semi-circular shape. The two first retaining rings are hinged to the other end face of the first clamp (530). A first through hole (560) is provided at the guide plate (330) for the first sleeve (720) to pass through. A first bolt (430) is provided at the end of the guide plate (330) away from the circular plate (710) and is threadedly connected to the first sleeve (720).

6. The installation device for a fiber optic grating sensor at a reinforcing bar according to claim 5, characterized in that: The second clamp assembly (310) includes a second connecting seat (590) and a second clamp (510). The second connecting seat (590) includes a mounting block (610). A second sleeve (620) is provided at one end face of the mounting block (610). A second internal thread is provided inside the second sleeve (620). A second through hole (520) is provided at the connecting rod (320) for the second sleeve (620) to pass through. A second bolt (570) is provided at one end of the connecting rod (320) away from the mounting block (610) and is threadedly connected to the second sleeve (620). The second clamp (510) includes two second retaining rings in a semi-circular shape. The two second retaining rings are hinged to one end face of the mounting block (610).

7. The installation device for a fiber optic grating sensor at a reinforcing bar according to claim 5, characterized in that: A first stop (730) is provided between the two first retaining rings and is fixedly connected to the circular plate (710).

8. The installation device for a fiber optic grating sensor at a reinforcing steel bar according to claim 6, characterized in that: A second stop (630) is provided between the two second retaining rings and is fixedly connected to the mounting block (610).

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