Concrete structure crack automatic monitoring system

Abstract

The invention relates to the technical field of structural crack monitoring, and provides a concrete structural crack automatic monitoring system, which comprises an electromagnetic monitoring module, an image acquisition module, a protection module and a cleaning module, the two electric sliding rails are respectively provided with a check block base and two supporting rods, the image acquisition module comprises two sliding blocks, the two sliding blocks are respectively connected with the two supporting rods in a sliding mode, and the protection module comprises a [-shaped plate connected to the protection shell in a sliding mode and a square baffle fixedly connected to the check block base. The cleaning module comprises a cleaning roller; the size of the crack can be monitored at any time through the electromagnetic monitoring module, power can be supplied through a 3V power source, energy consumption is small, and the maximum value or the minimum value of crack change can be monitored for a long time; when the electromagnetic monitoring module monitors that the crack changes, crack change information is transmitted to the image acquisition module through the data connection port for detailed detection.

Description

Technical Field

[0001] The invention relates to the technical field of structural crack monitoring, in particular to an automatic monitoring system for concrete structural cracks. Background Art

[0002] Concrete cracks are a common disease. The width, length and development of cracks have a vital impact on the operational safety and life of the project. The conventional crack width is about 0.2mm. Due to its extremely small width, the requirements for crack monitoring equipment are also extremely high.

[0003] The optical imaging method requires relatively high equipment costs, and if real-time monitoring is required, the cost is even higher. Therefore, when there are a large number of engineering cracks, a long monitoring time is required, or real-time monitoring is required, the cost of on-site monitoring rises sharply.

[0004] And the existing image forming method has the following disadvantages: 1. After the concrete floor is soaked by rain, the remaining rain will reflect the light generated by the light source, thus affecting the accuracy of camera recognition. In addition, external dust may cover the surface of the gap, affecting the camera's recognition. 2. External light sources affect the camera, changing the contrast of the recognition image, thereby reducing the quality of the recognition image.

[0005] To this end, the present invention proposes an automatic monitoring system for concrete structure cracks which can improve monitoring accuracy and reduce monitoring costs. Summary of the invention

[0006] The invention provides an automatic monitoring system for cracks in concrete structures, which solves the problems existing in the background technology by designing an electromagnetic monitoring module, an image acquisition module, a protection module and a cleaning module.

[0007] The technical solution of the present invention is as follows: A concrete structure crack automatic monitoring system, comprising: an electromagnetic monitoring module, an image acquisition module, a protection module, and a cleaning module, wherein the electromagnetic monitoring module comprises two electric slide rails parallel to each other, and block bases are installed on the two electric slide rails, and two support rods are installed between the two block bases, and one end of the two support rods is fixedly connected to one of the block bases, and the other end passes through the other block base and is movably connected thereto, and the support rods and the block bases are perpendicular to each other, and a block 1 is fixedly connected to one of the block bases, and a protective shell is fixedly connected to the other block base; The interior of the protective shell is hollow, and connecting heads are threadedly connected to both sides. The two connecting heads and the first stop block are in a straight line. A movable rod is movably connected inside the connecting head. One end of the movable rod abuts against the first stop block. A first permanent magnet is fixedly connected to the movable rod. A first spring is installed on the movable rod. The two ends of the first spring are respectively fixedly connected to the first permanent magnet and one of the connecting heads. Two second limit blocks are fixedly connected inside the protective shell. A second permanent magnet is slidably connected between the two second limit blocks. The sliding direction of the second permanent magnet is perpendicular to the moving direction of the movable rod. The second permanent magnet is hollow, and the first permanent magnet is located inside the second permanent magnet. A third spring is installed inside the protective shell. The two ends of the third spring are respectively fixedly connected to the protective shell and the second permanent magnet. One end of the second permanent magnet is fixedly connected to two stop blocks. The stop blocks are right trapezoids with opposite inclined surfaces. One end cross-section of the first permanent magnet is an isosceles trapezoid, and the two inclined surfaces are located between the trapezoidal inclined surfaces of the two stop blocks. Electromagnetic elements are installed inside the protective shell and on both sides of the second permanent magnet; The image acquisition module includes two sliders. The two sliders are respectively slidably connected to two support rods. Rotating rods are rotatably connected to the two sliders. Telescopic blocks are installed on the two rotating rods. The two ends of the telescopic block are respectively fixedly connected to the two rotating rods. A camera and a plurality of light sources are installed on one side of the telescopic block. The plurality of light sources are distributed around the camera. A light shielder is installed at the camera lens. An electric push rod is installed inside the protective shell. The output end of the electric push rod is fixedly connected to the slider.

[0008] Preferably, fixing plates are welded to both ends of the electric slide rail. A rack is fixedly connected to the first stop block. A gear ring is fixedly connected to the end of the movable rod close to the first stop block. The gear ring meshes with the rack.

[0009] Preferably, a data connection port is provided inside the protective shell. The data connection port is electrically connected to the electromagnetic element and the image acquisition module respectively.

[0010] Preferably, the protection module includes a U-shaped plate slidably connected to the protective shell and a square baffle fixedly connected to the base of the stop block. The length of the square baffle is less than the distance between the two sides of the U-shaped plate.

[0011] Preferably, the cleaning module includes threaded rods threadedly connected to both sides of the U-shaped plate. One end of the threaded rod is rotatably connected to a fixed rod. The two ends of the threaded rod are slidably connected to the U-shaped plate. And slide rods are provided at both ends of one side of the fixed rod. One end of the slide rod is located inside the fixed rod and is slidably connected to the fixed rod. The slide rod and the threaded rod are respectively located on both sides of the fixed rod. The other ends of the two slide rods are both fixedly connected to a first fixed block. A second spring is installed on the slide rod. The two ends of the second spring are respectively fixedly connected to the fixed rod and the first fixed block.

[0012] Preferably, a motor is installed on one of the fixed blocks 1, and a cleaning roller is rotatably connected between the two fixed blocks 1, the driving shaft of the motor is connected to the cleaning roller, an arc-shaped baffle is fixedly connected between the two fixed blocks 1 and located at the outer ring of the cleaning roller, a waste storage box and a fixed block 2 are fixedly connected to one side of the two fixed blocks 1 respectively, the fixed block 2 and the other fixed block 1 are rotatably connected with gears, the gear located on the fixed block 1 is connected to the cleaning roller, toothed belts are installed on the two gears, and the toothed belts are meshed with two gears.

[0013] Preferably, an arc-shaped cylinder is fixedly connected between the waste storage box and the second fixed block, and the arc-shaped cylinder is communicated with the inside of the waste storage box, a screw is arranged in the arc-shaped cylinder, one end of the screw passes into the waste storage box and is rotatably connected with the waste storage box, and the other end passes through the second fixed block and is connected to the gear on the second fixed block, an extrusion plate is rotatably connected in the arc-shaped cylinder, the extrusion plate is located at the notch of the arc-shaped cylinder, and the extrusion plate is fitted with the cleaning roller through a torsion spring.

[0014] Preferably, the cleaning roller is made of a water- and dust-absorbing high molecular polymer or collodion.

[0015] Preferably, the arc-shaped baffle covers two-thirds of the cleaning roller, and a cross section of one side of the arc-shaped baffle fits with a cross section of one side of the arc-shaped cylinder.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can monitor the size of cracks at all times through the electromagnetic monitoring module, which can be powered by a 3V power supply, has low energy consumption, and can monitor the maximum or minimum value of crack changes for a long time; since the changes in various parts of the cracks are more complicated, when the electromagnetic monitoring module detects that the cracks have changed, the crack change information is transmitted to the image acquisition module through the data connection port for detailed detection.

[0017] 2. The present invention cleans rainwater and dust through a cleaning module, which greatly improves the recognition accuracy of the image acquisition module and reduces the workload of post-processing image noise.

[0018] 3. The present invention can wrap the image acquisition module through the protection module, thereby improving the service life and accuracy of the image acquisition module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a stereogram of the present invention; Figure 2 is a stereogram of the image acquisition module of the present invention; Figure 3 It is a stereogram of the electromagnetic monitoring module and the image acquisition module of the present invention; Figure 4The present invention Figure 3 A partial enlarged view of Figure 5 is a three-dimensional diagram of a cleaning module of the present invention; Figure 6 is a partial cross-sectional perspective view of a cleaning module of the present invention; Figure 7 It is a cross-sectional view of the cleaning module of the present invention.

[0020] In the figure: 1. Electromagnetic monitoring module; 11. Electric slide rail; 12. Block base; 13. Support rod; 14. Block 1; 15. Protective shell; 16. Connector; 17. Moving rod; 18. Permanent magnet 1; 19. Spring 1; 110. Limit block 2; 111. Permanent magnet 2; 112. Block; 113. Electromagnetic element; 114. Fixed plate; 115. Data connector; 116. Spring 3; 117. Rack; 118. Gear ring; 2. Image acquisition module; 21. Slider; 22. Rotating rod; 23 , telescopic block; 24, camera; 25, light source; 26, sunshade; 27, electric push rod; 3, protection module; 31, curved plate; 32, square baffle; 4, cleaning module; 41, threaded rod; 42, fixed rod; 43, sliding rod; 44, fixed block one; 45, spring two; 46, motor; 47, cleaning roller; 48, arc baffle; 49, waste storage box; 410, fixed block two; 411, gear; 412, toothed belt; 413, arc cylinder; 414, screw; 415, extrusion plate. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Example

[0022] The present invention provides an automatic monitoring system for cracks in a concrete structure, comprising: an electromagnetic monitoring module 1, an image acquisition module 2, a protection module 3, and a cleaning module 4, wherein the electromagnetic monitoring module 1 comprises two electric slide rails 11 parallel to each other, and block bases 12 are installed on the two electric slide rails 11, and a screw transmission structure is provided between the electric slide rails 11 and the block base 12, and two support rods 13 are installed between the two block bases 12, and one end of the two support rods 13 is fixedly connected to one of the block bases 12, and the other end passes through the other block base 12 and is movably connected thereto, and the support rods 13 and the block base 12 are perpendicular to each other, and a block 14 is fixedly connected to one of the block bases 12, and a protective shell 15 is fixedly connected to the other block base 12; The interior of the protective shell 15 is hollow, and both sides are threadedly connected with connectors 16, the two connectors 16 are in a straight line with the stopper 14, a moving rod 17 is movably connected inside the connector 16, one end of the moving rod 17 abuts against the stopper 14, a permanent magnet 18 is fixedly connected to the moving rod 17, a spring 19 is installed on the moving rod 17, the two ends of the spring 19 are respectively fixedly connected to the permanent magnet 18 and one of the connectors 16, two limit blocks 110 are fixedly connected inside the protective shell 15, a permanent magnet 111 is slidably connected between the two limit blocks 110, and the permanent magnet 111 is fixedly connected to the permanent magnet 111. 1 The sliding direction is perpendicular to the moving direction of the moving rod 17, the permanent magnet 111 is hollow, and the permanent magnet 18 is located in the permanent magnet 111, and a spring 116 is installed in the protective shell 15. The two ends of the spring 116 are fixedly connected to the protective shell 15 and the permanent magnet 111, respectively. One end of the permanent magnet 111 is fixedly connected with two blocks 112, and the block 112 is a right-angled trapezoid with opposite inclined surfaces. The cross-section of one end of the permanent magnet 18 is an isosceles trapezoid, and the two inclined surfaces are located between the trapezoidal inclined surfaces of the two blocks 112. Electromagnetic elements 113 are installed inside the protective shell 15 and on both sides of the permanent magnet 111; The image acquisition module 2 includes two sliders 21, which are slidably connected to the two support rods 13 respectively. The two sliders 21 are rotatably connected to the rotating rods 22, and the two rotating rods 22 are installed with telescopic blocks 23. The two ends of the telescopic blocks 23 are fixedly connected to the two rotating rods 22 respectively. A camera 24 and multiple light sources 25 are installed on one side of the telescopic block 23. The multiple light sources 25 are distributed around the camera 24 to illuminate the gap, provide a good lighting environment for the camera 24 to identify the gap, and identify the gap more clearly. A shading device 26 is installed at the lens of the camera 24. The shading device 26 is used to protect the lens of the camera 24 and reduce the influence of the light source 25 on the lens. An electric push rod 27 is installed in the protective shell 15, and the output end of the electric push rod 27 is fixedly connected to the slider 21.

[0023] Fixed plates 114 are welded at both ends of the electric slide rail 11 , a rack 117 is fixedly connected to the stopper 14 , and a gear ring 118 is fixedly connected to one end of the moving rod 17 close to the stopper 14 , and the gear ring 118 is meshed with the rack 117 .

[0024] A data connection port 115 is provided in the protective shell 15 , and the data connection port 115 is electrically connected to the electromagnetic element 113 and the image acquisition module 2 respectively.

[0025] like Figure 1-4 As shown, firstly, two electric slide rails 11 are placed on both sides of the crack, and the stopper 14 is pressed against one end of the moving rod 17, and then the fixing plates 114 at both ends of the electric slide rails 11 are fixed to the concrete floor by bolts, as shown in FIG. Figure 3-4As shown, when various factors such as external pressure cause the crack to become larger or smaller, the distance between the two electric slide rails 11 becomes larger or smaller, so that the moving rod 17 moves toward the block 14 under the push of the spring 19, or the block 14 pushes the moving rod 17 to move away from the block 14, thereby driving the permanent magnet 18 on the moving rod 17 to move. Because electromagnetic elements 113 are installed on both sides of the protective shell 15, when the permanent magnet 18 moves, the magnetic flux of the electromagnetic element 113 changes, so that the change of the magnetic flux is monitored by the Hall sensor installed in the protective shell 15, and the precise value is recorded. At the same time, the displacement sensor installed in the protective shell 15 can monitor the distance moved by the moving rod 17 and record the precise value, so that the change of the crack can be monitored by the change of the magnetic flux.

[0026] like Figure 2 As shown in the figure, when the crack is longitudinally offset, the two electric slide rails 11 will move in an interlaced manner, thereby driving the two block bases 12 to move in an interlaced manner through the screw on the electric slide rail 11, and causing one block base 12 to drive the support rod 13 to move in the other block base 12, so that the moving rod 17 and the block 14 are relatively displaced, and then the gear ring 118 at one end of the moving rod 17 is meshed with the rack 117 on the block 14, so that the moving rod 17 rotates, as shown in the figure. Figure 4 As shown, the movable rod 17 rotates to drive the permanent magnet 18 to tilt. Since the trapezoidal slope of the stop block 112 matches the trapezoidal slope of the permanent magnet 18, when the permanent magnet 18 tilts, the stop block 112 is pushed upward, thereby driving the permanent magnet 2 111 to move upward, so that the magnetic flux of the electromagnetic element 113 changes, thereby being able to monitor the longitudinal deviation caused by the crack.

[0027] It should be noted that when the longitudinal displacement of the crack becomes smaller, permanent magnet 18 gradually resets, causing permanent magnet 2 111 to move downward under the push of spring 3 116, and causing the magnetic flux of electromagnetic element 113 to change, thereby being able to monitor the changes when the longitudinal displacement of the crack becomes smaller.

[0028] By setting the linkage between the permanent magnet 18 and the permanent magnet 2 111, it is possible to monitor the lateral displacement of the crack while monitoring the longitudinal displacement of the crack, thereby increasing the monitoring range.

[0029] The size of the crack can be monitored at all times through the electromagnetic monitoring module 1, which can be powered by a 3V power supply, with low energy consumption, and can monitor the maximum or minimum value of the crack change for a long time; since the changes in various parts of the crack are more complicated, when the electromagnetic monitoring module 1 detects that the crack has changed, the crack change information is transmitted to the image acquisition module 2 through the data connection port 115 for detailed detection. The specific steps are as follows: like Figure 2As shown in the figure, turn on the camera 24 and the light source 25, and start the electric slide rail 11 to drive the electromagnetic monitoring module 1 and the image acquisition module 2 to move along the crack, and identify the crack through the camera 24. Since the crack is not a straight line and may be curved or branched, by simultaneously starting the electric push rod 27 to push the two sliders 21, and through the rotating rod 22 and the telescopic block 23, the position of the camera 24 can be moved so that the camera 24 is always facing the crack. When the crack branches, start one of the electric push rods 27 to push one slider 21 to move, tilt the camera 24, and at the same time extend the telescopic block 23, and move the image acquisition module 2 through the electric slide rail 11, so that the camera 24 can move along the branched crack and face the crack, so that the camera 24 can accurately identify the characteristics of the crack and improve the accuracy of crack monitoring.

[0030] The electromagnetic monitoring module 1 monitors the size change of the crack in real time, and the image acquisition module 2 monitors the change characteristics of the crack regularly, avoiding the long-term use of the image acquisition method to monitor the concrete structure crack in real time, and reducing the energy consumption during monitoring. Embodiment

[0031] The protection module 3 includes a U-shaped plate 31 slidably connected to the protection shell 15 and a square baffle 32 fixedly connected to the block base 12. The length of the square baffle 32 is less than the distance between the two sides of the U-shaped plate 31. When the crack becomes smaller, the two electric slide rails 11 approach each other, and the square baffle 32 enters the U-shaped plate 31 without affecting the normal movement of the electric slide rails 11.

[0032] As Figure 1 As shown in the figure, to avoid the influence of sunlight or external light, rain, dust, etc. on the image acquisition module 2, the protection module 3 can wrap the image acquisition module 2 to improve the service life and accuracy of the image acquisition module 2.

[0033] The cleaning module 4 includes threaded rods 41 screwed on both sides of the U-shaped plate 31. One end of the threaded rod 41 is rotatably connected to a fixed rod 42. The two ends of the threaded rod 41 are slidably connected to the U-shaped plate 31, and both ends of one side of the fixed rod 42 are provided with sliding rods 43. One end of the sliding rod 43 is located inside the fixed rod 42 and is slidably connected to the fixed rod 42. The sliding rod 43 and the threaded rod 41 are located on both sides of the fixed rod 42. The other ends of the two sliding rods 43 are fixedly connected to a first fixed block 44. A second spring 45 is installed on the sliding rod 43, and both ends of the second spring 45 are fixedly connected to the fixed rod 42 and the first fixed block 44 respectively.

[0034] A motor 46 is installed on one of the fixed blocks 44, and a cleaning roller 47 is rotatably connected between the two fixed blocks 44. The driving shaft of the motor 46 is connected to the cleaning roller 47. An arc-shaped baffle 48 is fixedly connected between the two fixed blocks 44 and located on the outer ring of the cleaning roller 47. A waste storage box 49 and a fixed block 2 410 are fixedly connected to one side of the two fixed blocks 44, respectively. The fixed block 2 410 and the other fixed block 44 are rotatably connected with a gear 411. The gear 411 located on the fixed block 44 is connected to the cleaning roller 47. A toothed belt 412 is installed on the two gears 411, and the toothed belt 412 is meshed with the two gears 411.

[0035] An arc-shaped cylinder 413 is fixedly connected between the waste storage box 49 and the second fixed block 410, and the arc-shaped cylinder 413 is communicated with the inside of the waste storage box 49. A screw 414 is arranged in the arc-shaped cylinder 413. One end of the screw 414 passes into the waste storage box 49 and is rotatably connected to the waste storage box 49, and the other end passes through the second fixed block 410 and is connected to the gear 411 on the second fixed block 410. An extrusion plate 415 is rotatably connected in the arc-shaped cylinder 413. The extrusion plate 415 is located at the notch of the arc-shaped cylinder 413, and the extrusion plate 415 is fitted with the cleaning roller 47 through a torsion spring, so that when the cleaning roller 47 is worn, the extrusion plate 415 can still fit with the cleaning roller 47.

[0036] The cleaning roller 47 is made of a high molecular polymer or collodion that absorbs water and dust.

[0037] The arc-shaped baffle 48 covers two-thirds of the cleaning roller 47 to protect the cleaning roller 47 and prevent external dust from contaminating the cleaning roller 47 without hindering the normal rolling of the cleaning roller 47. The cross section of one side of the arc-shaped baffle 48 fits the cross section of one side of the arc-shaped cylinder 413.

[0038] like Figure 5-7 As shown, after the rain soaks the concrete floor, the remaining rain will reflect the light generated by the light source 25, thereby affecting the accuracy of the camera 24 recognition, and external dust and the like may cover the surface of the gap, affecting the recognition of the camera 24, so the gap is cleaned by the cleaning module 4 to reduce the negative impact of external factors on the recognition accuracy of the image acquisition module 2: When installing this device, first slide the U-shaped plate 31 on the protective shell 15 above the image acquisition module 2, and then rotate the threaded rod 41 to move the threaded rod 41 downward. Since the fixed rod 42 is slidably connected to the U-shaped plate 31 and rotatably connected to the threaded rod 41, the threaded rod 41 is caused to push the fixed rod 42 downward and drive the sliding rod 43 downward until the first fixed block 44 is blocked by the surface of the concrete structure, causing the sliding rod 43 to slide into the fixed rod 42 and compress the second spring 45. Thus, under the elastic force of the second spring 45, the cleaning roller 47 is closely attached to the surface of the concrete structure, making the cleaning of the cleaning roller 47 cleaner; after starting the electric slide rail 11, start the motor 46 to drive the cleaning roller 47 to rotate, and adsorb the rainwater and dust on the concrete surface through the cleaning roller 47; at the same time, squeeze one place of the cleaning roller 47 through the extrusion plate 415 to scrape the dust and rainwater on the cleaning roller 47 into the arc-shaped cylinder 413; while the cleaning roller 47 rotates, it drives the gear 411 on the first fixed block 44 to rotate, and drives the gear 411 on the second fixed block 410 to rotate synchronously through the toothed belt 412, so that the gear 411 drives the screw rod 414 to rotate, and the dust and rainwater are rolled into the waste storage box 49 through the thread on the screw rod 414 and discharged from the other end of the waste storage box 49 to prevent secondary pollution to the cracks of the concrete structure; the cleaning module 4 is used to clean the rainwater and dust, greatly improving the recognition accuracy of the image acquisition module 2 and reducing the workload of post-processing image noise at the same time.

[0039] It should be noted that as Figure 1 shown, when the image acquisition module 2 moves to the upper left, start the cleaning module 4 at the lower right, and as Figure 6 , Figure 7 shown, make the cleaning roller 47 rotate counterclockwise, that is, in the opposite direction to the movement direction of the image acquisition module 2, increasing the friction between the cleaning roller 47 and the concrete ground and improving the cleaning effect.

[0040] The embodiments of the present invention are given for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A concrete structure crack automatic monitoring system, comprising: An electromagnetic monitoring module (1), an image acquisition module (2), a protection module (3), and a cleaning module (4), characterized in that: the electromagnetic monitoring module (1) comprises two electric slide rails (11) parallel to each other, each of the two electric slide rails (11) being provided with a block base (12), two support rods (13) being provided between the two block bases (12), and one end of the two support rods (13) being fixedly connected to one of the block bases (12), and the other end of the two support rods (13) passing through the other block base (12) and being movably connected thereto, the support rods (13) and the block base (12) being perpendicular to each other, a block 1 (14) being fixedly connected to one of the block bases (12), and a protective shell (15) being fixedly connected to the other block base (12); The protective shell (15) is hollow inside, and both sides are threadedly connected with connectors (16), the two connectors (16) and the stopper (14) are in a straight line, a moving rod (17) is movably connected inside the connector (16), one end of the moving rod (17) abuts against the stopper (14), a permanent magnet (18) is fixedly connected to the moving rod (17), a spring (19) is installed on the moving rod (17), two ends of the spring (19) are respectively fixedly connected to the permanent magnet (18) and one of the connectors (16), two limit blocks (110) are fixedly connected inside the protective shell (15), a permanent magnet (111) is slidably connected between the two limit blocks (110), and the permanent magnet (111) is fixedly connected to the permanent magnet (18) and one of the connectors (16). 111) The sliding direction is perpendicular to the moving direction of the moving rod (17); the permanent magnet 2 (111) is hollow, and the permanent magnet 1 (18) is located inside the permanent magnet 2 (111); a spring 3 (116) is installed inside the protective shell (15); the two ends of the spring 3 (116) are respectively fixedly connected to the protective shell (15) and the permanent magnet 2 (111); one end of the permanent magnet 2 (111) is fixedly connected to two blocks (112); the blocks (112) are right-angled trapezoids with opposite inclined surfaces; the cross-section of one end of the permanent magnet 1 (18) is an isosceles trapezoid, and the two inclined surfaces are located between the trapezoidal inclined surfaces of the two blocks (112); and electromagnetic elements (113) are installed inside the protective shell (15) and on both sides of the permanent magnet 2 (111); The image acquisition module (2) includes two sliders (21), the two sliders (21) are respectively slidably connected to two support rods (13), a rotating rod (22) is rotatably connected to each of the two sliders (21), a telescopic block (23) is installed on the two rotating rods (22), both ends of the telescopic block (23) are fixedly connected to the two rotating rods (22) respectively, a camera (24) and a plurality of light sources (25) are installed on one side of the telescopic block (23), the plurality of light sources (25) are distributed around the camera (24), a light shutter (26) is installed at the lens of the camera (24), an electric push rod (27) is installed in the protective shell (15), and the output end of the electric push rod (27) is fixedly connected to the slider (21).

2. The automatic monitoring system for concrete structure cracks according to claim 1, characterized in that: Fixing plates (114) are welded at both ends of the electric slide rail (11), a rack (117) is fixedly connected to the first stop block (14), a gear ring (118) is fixedly connected to one end of the moving rod (17) close to the first stop block (14), and the gear ring (118) meshes with the rack (117).

3. The automatic monitoring system for cracks in concrete structures according to claim 1, characterized in that: A data connection port (115) is arranged in the protective shell (15), and the data connection port (115) is electrically connected to the electromagnetic element (113) and the image acquisition module (2) respectively.

4. The automatic monitoring system for cracks in concrete structures according to claim 1, characterized in that: The protection module (3) includes a U-shaped plate (31) slidably connected to the protective shell (15), and a square baffle (32) fixedly connected to the stop block base (12), and the length of the square baffle (32) is less than the distance between the two sides of the U-shaped plate (31).

5. The automatic monitoring system for cracks in concrete structures according to claim 4, characterized in that: The cleaning module (4) includes threaded rods (41) threadedly connected to both sides of the U-shaped plate (31), a fixed rod (42) is rotatably connected to one end of each threaded rod (41), both ends of the threaded rods (41) are slidably connected to the U-shaped plate (31), and slide rods (43) are arranged at both ends on one side of the fixed rod (42), one end of each slide rod (43) is located in the fixed rod (42) and is slidably connected to the fixed rod (42), the slide rods (43) and the threaded rods (41) are respectively located on both sides of the fixed rod (42), fixed blocks one (44) are fixedly connected to the other ends of the two slide rods (43), a second spring (45) is installed on each slide rod (43), and both ends of the second spring (45) are fixedly connected to the fixed rod (42) and the fixed block one (44) respectively.

6. The automatic monitoring system for cracks in concrete structures according to claim 5, characterized in that: A motor (46) is mounted on one of the fixed blocks (44), and a cleaning roller (47) is rotatably connected between the two fixed blocks (44). The driving shaft of the motor (46) is connected to the cleaning roller (47). An arc-shaped baffle (48) is fixedly connected between the two fixed blocks (44) and located on the outer ring of the cleaning roller (47). A waste storage box (49) and a fixed block (410) are fixedly connected to one side of the two fixed blocks (44). The fixed block (410) and the other fixed block (44) are both rotatably connected to a gear (411). The gear (411) located on the fixed block (44) is connected to the cleaning roller (47). A toothed belt (412) is mounted on the two gears (411), and the toothed belt (412) is meshedly connected to the two gears (411).

7. The automatic monitoring system for cracks in concrete structures according to claim 6, characterized in that: An arc-shaped cylinder (413) is fixedly connected between the waste storage box (49) and the second fixed block (410), and the arc-shaped cylinder (413) is in communication with the interior of the waste storage box (49). A screw rod (414) is arranged in the arc-shaped cylinder (413), one end of the screw rod (414) passes through the waste storage box (49) and is rotatably connected to the waste storage box (49), and the other end of the screw rod (414) passes through the second fixed block (410) and is connected to a gear (411) on the second fixed block (410). An extrusion plate (415) is rotatably connected in the arc-shaped cylinder (413), the extrusion plate (415) is located at a notch of the arc-shaped cylinder (413), and the extrusion plate (415) is in contact with the cleaning roller (47) via a torsion spring.

8. The automatic monitoring system for cracks in concrete structures according to claim 7, characterized in that: The cleaning roller (47) is made of a high molecular polymer and collodion that can absorb water and dust.

9. The automatic monitoring system for cracks in concrete structures according to claim 8, characterized in that: The arc-shaped baffle (48) covers two thirds of the cleaning roller (47), and a cross section on one side of the arc-shaped baffle (48) fits a cross section on one side of the arc-shaped cylinder (413).

Images