Bridge crack detection device

Abstract

The utility model relates to the technical field of crack detection, and particularly discloses a bridge crack detection device which comprises a sleeve, a pull rod and a displacement sensor, main scale scales are arranged on the pull rod, a vernier scale which is attached to the outer side of the pull rod and extends in the axial direction is fixed to the sleeve, vernier scale scales are marked on the vernier scale, and the minimum division value of the vernier scale scales is smaller than the minimum division value of the main scale scales. In the working process of the bridge crack detection device, when an electronic element breaks down, crack data can be temporarily obtained in a scale reading mode, and monitoring interruption is avoided. In the process of monitoring the crack state based on the sensing system, crack data can be regularly obtained through scale readings, so that the precision of the sensing system is verified, a closed-loop quality control system of automatic monitoring and manual verification is formed, the accuracy of the crack data is improved, and working abnormity of the sensing system can be found in time. The bridge crack detection device is ingenious and reasonable in structure and high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to crack detection technical field especially relates to a bridge crack detection device. BACKGROUND

[0002] As the key node of traffic infrastructure, the structural safety monitoring of bridge is very important, and the accurate detection and continuous monitoring of crack, as the typical representation of bridge disease, is always the focus of industry technology research. At present, the commonly used bridge crack detection device is mostly based on electronic sensing technology to obtain detection data, and the detection data is fed back to the monitoring end through wired or wireless transmission mode to realize the real-time monitoring of crack state. The defect of the prior art is that the monitoring data is interrupted by the failure of electronic components, especially in remote areas or harsh environments, the equipment maintenance cycle is long, so that the data interruption may cover the dynamic development of crack, and increase the safety hidden danger of bridge. In terms of data reliability, the existing bridge crack detection device lacks effective data verification mechanism, and the data distortion caused by sensor drift, environmental interference (such as temperature and humidity fluctuation) or human operation error can not be found in time, which affects the accurate judgment of crack expansion trend. SUMMARY

[0003] In order to overcome the defects of the prior art, the utility model provides a kind of bridge crack detection device. On the basis of existing product, utilize the structural characteristics of existing product, realize the scale reading function of high accuracy by setting main ruler scale and vernier scale, can avoid the data interruption caused by the failure of electronic components, and the detection data can be verified to improve data accuracy and find the working abnormity of sensing system in time.

[0004] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0005] A kind of bridge crack detection device, including the sleeve pipe and pull rod of plug-in cooperation, displacement sensor coupled with pull rod is installed in sleeve pipe interior;The pull rod side wall is provided with a along axial direction extending sliding slot, the main ruler strip that can be adjusted along its sliding is arranged in the sliding slot, and the main ruler strip is fixed and adjusted by locking member with the sliding slot;The main ruler strip is marked with main ruler scale along the axial direction of pull rod;The sleeve pipe is fixed with a vernier scale extending along the axial direction sticking to the outer side of pull rod, and the vernier scale is marked with vernier scale scale;The minimum graduation value of vernier scale scale is less than the minimum graduation value of main ruler scale.

[0006] In the preferred embodiment, the minimum graduation value of main ruler scale is 1mm, and the minimum graduation value of vernier scale scale is 0.9mm-0.98mm.

[0007] In a preferred embodiment, the vernier scale is elongated and has an arc-shaped structure to fit the curved surface of the pull rod. A connecting plate is fixed to one end of the vernier scale near the sleeve, and the connecting plate is fixed to the end of the sleeve.

[0008] In a preferred embodiment, the mounting components at both ends of the sleeve and the pull rod have identical structures, each including an insert plate and a mounting base. The insert plate is fixed to one side of the corresponding ends of the sleeve and the pull rod. Clamping grooves are respectively formed on the two end walls of the insert plate perpendicular to the sleeve. The mounting base has an insertion hole for inserting the insert plate, and a locking pin that mates with the two clamping grooves is provided in the insertion hole. The locking pin is elastically supported by an elastic arm fixed to the mounting base. The mounting plate is fixedly connected to the end of the mounting base away from the insertion hole.

[0009] Furthermore, protruding positioning strips are fixed on both sides of the insertion plate in the thickness direction, and positioning grooves for accommodating the two positioning strips are provided on the corresponding sides of the insertion hole.

[0010] Furthermore, at least one of the two insert plates at both ends of the bridge crack detection device is fixedly connected to a collar; the collar is sleeved and fixed on the corresponding sleeve or tie rod and can be axially adjusted in position, and the collar is provided with a locking bolt.

[0011] Compared with the prior art, the bridge crack detection device of this utility model has the following beneficial technical effects:

[0012] During operation, this bridge crack detection device can temporarily acquire crack data via scale readings when electronic components malfunction, preventing data interruption. Based on the sensor system's monitoring of crack conditions, crack data can be periodically acquired through scale readings to verify the sensor system's accuracy, forming a closed-loop quality control system of automatic monitoring and manual verification. This improves the accuracy of crack data and facilitates timely detection of sensor system malfunctions for prompt repair. The device's structure is ingenious and rational, utilizing its structural features to achieve high-precision mechanical measurement at a relatively low implementation cost. Combined with existing UAV inspection technology, it possesses high feasibility and broad application prospects. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0014] Figure 1 This is a schematic diagram of the overall structure of the bridge crack detection device in the embodiment.

[0015] Figure 2The structural schematic view of the bridge crack detection device after the mounting seat is removed in the embodiment.

[0016] Figure 3 The structural schematic view of the cooperation of the sleeve, the pull rod and the inserting plate in another direction in the embodiment.

[0017] Figure 4 The structural schematic view of the cooperation of the sleeve, the pull rod and the inserting plate in another direction in the embodiment.

[0018] Figure 5 The structural schematic view of the mounting seat in the embodiment.

[0019] Figure 6 The structural schematic view of the mounting seat after being partially cut open in the embodiment.

[0020] Figure 7 The structural schematic view of the combination of the inserting plate and the mounting seat in the embodiment.

[0021] In the figure, 1 is a signal line, 2 is a sleeve, 3 is a pull rod, 4 is a sleeve ring, 5 is a mounting seat, 6 is a mounting plate, 7 is an inserting plate, 8 is a positioning convex strip, 9 is a clamping groove, 10 is a locking bolt, 11 is a vernier, 12 is a vernier scale, 13 is a connecting plate, 14 is a main scale, 15 is a main scale bar, 16 is a locking piece, 17 is a sliding groove, 18 is a mounting hole, 19 is a positioning groove, 20 is a inserting hole, 21 is an elastic arm, and 22 is a clamping pin. DETAILED DESCRIPTION

[0022] In order to make the purpose, the technical scheme and the advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all the other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.

[0023] Reference Figures 1-4As shown, the embodiment discloses the bridge crack detection device in the application, which comprises a sleeve 2 and a pull rod 3, one end of the pull rod 3 is inserted into the inside of the sleeve 2 and both are slidingly matched, a displacement sensor and a power supply module are installed in the inside of the sleeve 2, the displacement sensor is coupled with the pull rod 3 for sensing the relative displacement of the pull rod 3 and the sleeve 2, the distal ends of the sleeve 2 and the pull rod 3 are respectively provided with mounting assemblies for stably mounting the sleeve 2 and the pull rod 3 on the wall surface of the bridge with cracks; in combination with the prior art implementation process, environmental detection elements such as humidity sensors and temperature sensors can be integrated in the sleeve 2 according to actual needs, so as to correct and compensate the detection data in combination with environmental factors, and improve the detection accuracy; a signal line 1 for transmitting detection signals is led out on the sleeve 2 or the pull rod 3.

[0024] A sliding groove 17 is formed in the side wall of the pull rod 3 along the axial direction, a main ruler 15 capable of being adjusted along the sliding groove 17 is arranged in the sliding groove 17, a locking piece 16 is arranged between the main ruler 15 and the sliding groove 17, the locking piece 16 can be a bolt or a buckle and the like, so as to realize the fixed adjustment of the main ruler 15 and the sliding groove 17; a main ruler scale 14 is marked on the main ruler 15 along the axial direction of the pull rod 3, the minimum graduation value of the main ruler scale 14 is 1 mm, which constitutes a reference length measurement reference; a vernier scale 11 extending along the axial direction and adhering to the outer side of the pull rod 3 is fixed on the sleeve 2, a vernier scale scale 12 is marked on the vernier scale 11, the minimum graduation value of the vernier scale scale 12 is smaller than that of the main ruler scale 14; according to the measurement accuracy requirement, the minimum graduation value of the vernier scale scale 12 can be set to 0.9 mm, 0.95 mm and 0.98 mm and the like, and the corresponding reading accuracy is 0.1 mm, 0.05 mm and 0.02 mm respectively; based on the above structure, under the cooperation of the main ruler scale 14 and the vernier scale scale 12, the sleeve 2 and the pull rod 3 substantially have the structure and function of a vernier caliper, when the pull rod 3 and the sleeve 2 produce relative displacement along the axial direction, the main ruler scale 14 and the vernier scale scale 12 will also produce the same displacement, thereby, by observing and recording the corresponding relationship between the main ruler scale 14 and the vernier scale scale 12, the displacement amount of the sleeve 2 and the pull rod 3 can be calculated, that is, the crack detection data is obtained by reading; since the main ruler scale 14 is arranged on the main ruler 15 which can be adjusted, after the bridge crack detection device is installed, the position of the main ruler 15 can be adjusted, the value corresponding to the vernier scale scale 12 and the main ruler scale 14 is adjusted to zero or the actual value of the crack width, so as to facilitate subsequent data analysis.

[0025] Based on the above, the bridge crack detection device has the function of traditional products, and the sensing system is used as the main monitoring unit to realize automatic continuous monitoring. When the electronic element fails, the crack data can be temporarily obtained by the scale reading method to avoid interruption of monitoring. During the crack state monitoring process based on the sensing system, the crack data can be obtained by the scale reading method periodically to check the accuracy of the sensing system, forming a closed-loop quality control system of automatic monitoring and manual checking to improve the accuracy of the crack data and facilitate the timely discovery of the working abnormality of the sensing system for timely maintenance. At present, the unmanned aerial vehicle bridge inspection technology is relatively mature, and the main scale scale 14 and the vernier scale scale 12 can be conveniently obtained based on this technology, and the crack data can be obtained through the electronic identification system. Under the support of this prior art, the implementability of the bridge crack detection device is greatly improved, and the bridge crack detection device has a broad application prospect.

[0026] As shown in Figure 3 、 Figure 4 In the preferred embodiment, the vernier scale 11 is in the shape of a long strip and adopts an arc structure to adapt to the curved surface of the pull rod 3. The vernier scale 11 is fixed at one end close to the sleeve 2 with a connecting plate 13, and the connecting plate 13 is fixed to the end of the sleeve 2. In this way, the structural strength of the vernier scale 11 can be significantly improved, and the accuracy of the reading can be avoided. When the vernier scale 11 is bent or broken, it can be conveniently and quickly replaced.

[0027] Generally, when the bridge crack detection device is calibrated, the battery is replaced, or other regular maintenance operations are performed, or when maintenance operations are performed, the bridge crack detection device needs to be completely disassembled, repaired, and then installed again. The existing bridge crack detection device is usually installed and fixed by bolts and angle iron supports, and the disassembly and assembly operations are relatively troublesome. In addition, the complexity of the site conditions further increases the operation difficulty. At the same time, when the bridge crack detection device is reinstalled, it usually needs to be re-punched to ensure the stability of the installation, which causes certain damage to the bridge structure. Therefore, the bridge crack detection device in the utility model also has the following improvements:

[0028] Referring to Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 7As shown, the mounting assembly structure of both ends of the sleeve 2 and the pull rod 3 is consistent, both including a plug-in plate 7 and a mounting seat 5; the plug-in plate 7 is fixed on one side of the corresponding end of the sleeve 2 and the pull rod 3, and is located in the radial plane of the sleeve 2; two end walls of the plug-in plate 7 perpendicular to the sleeve 2 are respectively provided with clamping grooves 9; the mounting seat 5 is provided with a plug hole 20 for inserting the plug-in plate 7, and opposite ends of the plug hole 20 are provided with clamping pins 22 matched with the two clamping grooves 9, the clamping pins 22 are provided with elastic support by elastic arms 21 fixed on the mounting seat 5; the mounting seat 5 is fixedly connected with a mounting plate 6 at an end away from the plug hole 20, and the mounting plate 6 is provided with a mounting hole 18.

[0029] When the bridge crack detection device is installed, first, the two mounting seats 5 are installed and fixed at predetermined positions, and then the plug-in plate 7 is inserted into the corresponding plug hole 20; in the process of moving the plug-in plate 7 to the bottom of the plug hole 20, the clamping pin 22 is forced to deviate from the initial position, so as not to hinder the movement of the plug-in plate 7; when the plug-in plate 7 reaches the bottom of the plug hole 20, the clamping pin 22 falls into the clamping groove 9 to lock the plug-in plate 7 and the mounting seat 5, thereby completing the installation and fixation of the bridge crack detection device. In the normal working process, the clamping pin 22 cooperates with the clamping groove 9 to provide good locking action for the plug-in plate 7 and the mounting seat 5, avoiding the separation of the plug-in plate 7 from the mounting seat 5 under non-human operation; when the bridge crack detection device is disassembled, the plug-in plate 7 is pulled out of the mounting seat 5 by external force, and the main part composed of the sleeve 2, the pull rod 3 and other components can be removed, which is convenient, fast, labor-saving and efficient.

[0030] At the same time, since the mounting seat 5 does not need to be disassembled, its installation stability is not affected, thereby avoiding re-drilling when reinstalling to reduce the damage to the bridge structure.

[0031] Further, as shown in Figure 3 , Figure 5 , Figure 6 The two sides of the plug-in plate 7 in the thickness direction are respectively fixed with protruding positioning protrusions 8, and the corresponding two sides of the plug hole 20 are provided with positioning grooves 19 for accommodating the two positioning protrusions 8; thereby the cooperation stability and assembly precision of the plug-in plate 7 and the mounting seat 5 can be improved.

[0032] Further, as shown in Figure 2 , Figure 3 Among the two plug-in plates 7 at both ends of the bridge crack detection device, at least one plug-in plate 7 is fixedly connected with a sleeve ring 4; the sleeve ring 4 is fixedly sleeved on the corresponding sleeve 2 or pull rod 3 and can axially adjust the position, and the sleeve ring 4 is provided with a locking bolt 10; thereby, the spacing between the two mounting assemblies can be adjusted according to the installation needs, to improve the applicability of the bridge crack detection device to the installation conditions.

Claims

1. A bridge crack detection device, comprising a sleeve and a tie rod that are inserted into each other, wherein a displacement sensor coupled to the tie rod is installed inside the sleeve, characterized in that: The pull rod has an axially extending groove on its side wall. A main scale bar that can slide and adjust along the groove is provided in the groove. The main scale bar and the groove are fixed and adjusted by a locking device. The main scale bar is marked with main scale graduations along the axial direction of the pull rod. A vernier scale that extends axially along the outside of the pull rod is fixed on the sleeve. The vernier scale is marked with vernier scale graduations. The minimum graduation value of the vernier scale is smaller than the minimum graduation value of the main scale graduations.

2. The bridge crack detection device according to claim 1, characterized in that: The minimum division value of the main scale is 1 mm, and the minimum division value of the vernier scale is 0.9 mm to 0.98 mm.

3. The bridge crack detection device according to claim 1, characterized in that: The vernier scale is long and narrow, with an arc-shaped structure to fit the curved surface of the pull rod. A connecting plate is fixed to one end of the vernier scale near the sleeve, and the connecting plate is fixed to the end of the sleeve.

4. The bridge crack detection device according to claim 1, characterized in that: The mounting components at both ends of the sleeve and the pull rod have the same structure, each including an insert plate and a mounting base. The insert plate is fixed to one side of the corresponding end of the sleeve and the pull rod. The insert plate has locking grooves on its two end walls perpendicular to the sleeve. The mounting base has a hole for inserting the insert plate, and the hole has a locking pin that mates with the two locking grooves. The locking pin is elastically supported by an elastic arm fixed to the mounting base. The mounting plate is fixedly connected to the end of the mounting base away from the hole.

5. The bridge crack detection device according to claim 4, characterized in that: The insert plate has protruding positioning strips fixed on both sides in the thickness direction, and the corresponding sides of the insertion hole are provided with positioning grooves for accommodating the two positioning strips.

6. The bridge crack detection device according to claim 4, characterized in that: At least one of the two insert plates at both ends of the bridge crack detection device is fixedly connected to a collar; the collar is sleeved and fixed on the corresponding sleeve or tie rod and can be axially adjusted in position, and the collar is provided with a locking bolt.

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