A device for detecting flatness in bridge construction based on the Internet of Things

Abstract

The application discloses a bridge construction detection flatness device based on the Internet of Things, and belongs to the technical field of bridge construction, which comprises two symmetrically arranged moving tables, the bottom of each moving table is provided with a plurality of universal wheels and vacuum suction cups, the top of each moving table is coaxially and rotationally connected with a workbench, and a locking pin is detachably connected between the workbench and the moving table; two groups of telescopic guide frames are arranged between the opposite ends of the workbench, sliding structures are arranged on the guide frames, a detection structure is arranged between the sliding structures, the detection structure comprises support frames connected with the corresponding sliding structures at two ends, a plurality of first telescopic rods vertically downward are arranged on the support frames, support rods are coaxially and slidingly connected with the end portions of the telescopic rods, and elastic supporting pieces are arranged between the support rods and the end portions of the telescopic rods; the device aims to solve the problem that the existing detection device is prone to deviation during detection and is prone to affecting the detection result.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, specifically relating to an Internet of Things-based device for detecting the flatness of bridges. Background Technology

[0002] Bridges generally refer to structures built over rivers, lakes, and seas to allow vehicles and pedestrians to pass smoothly. In order to adapt to the modern high-speed development of the transportation industry, bridges have also been extended to refer to buildings that cross mountain streams, adverse geological conditions, or meet other transportation needs to make travel more convenient.

[0003] During bridge construction, the flatness of the bridge deck is one of the quality requirements of the bridge. Existing bridge flatness testing devices use a method of moving and testing at the same time. However, in the above testing method, the testing device needs to move in a certain direction. If it deviates during the movement, it is easy to cause missed detections or repeated detections, which will affect the test results. Summary of the Invention

[0004] In view of this, the present invention discloses an Internet of Things-based device for detecting the flatness of bridge construction, the purpose of which is to solve the problem that existing detection devices are prone to deviation during the detection process, which can easily affect the detection results.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A device for detecting the flatness of bridge construction based on the Internet of Things includes two symmetrically arranged mobile platforms. Each mobile platform has several casters and vacuum suction cups at its bottom. A worktable is coaxially rotatably connected to the top of each mobile platform. A locking pin detachably connects the worktable and the mobile platform. Two sets of telescopic guide frames are arranged between the opposing ends of the worktables. Each guide frame has a sliding structure, and a detection structure is arranged between the sliding structures. The detection structure includes a support frame with both ends connected to the corresponding sliding structures. Several vertically downward telescopic rods are arranged on the support frames. Support rods are coaxially slidably connected to the ends of the telescopic rods. An elastic support is provided between the support rods and the ends of the telescopic rods. Pressure sensors for detecting the pressure applied to the ends of the support rods are provided at the ends of the support rods. A spraying device is arranged on one side of each support rod. A controller connected to the pressure sensors and the spraying device is arranged on the support frames.

[0007] In this solution, a vacuum suction cup on one of the moving platforms is attached to the bridge surface. Then, another moving platform is moved. Once the second moving platform reaches the desired position, its vacuum suction cup is attached to the bridge surface. The guide frame expands as the moving platforms move. By controlling the extension and retraction of the first telescopic rod, the support rod, under the action of the elastic support, remains pressed against the bridge surface, applying pressure to its end. A sliding structure then drives the support frame to move along the guide frame. The support frame, in turn, moves the support rod synchronously via the first telescopic rod, and the controller is activated. When the support rod contacts a concave or convex area of ​​the bridge surface, the pressure on its end increases or decreases. When the pressure sensor detects a pressure change, the controller controls the corresponding spraying device to spray, highlighting the concave or convex areas of the bridge surface. Furthermore, after horizontal transverse detection, the vacuum suction cup at the bottom of one moving platform is released, the locking pin on the other moving platform is removed, and the corresponding worktable is rotated to adjust the guide frame to a horizontal longitudinal position for easy horizontal longitudinal detection.

[0008] This solution utilizes a guide frame with a telescopic structure between the moving stages to guide the moving stages and support frame, preventing deviation during the movement and detection process. This allows for precise control of the orientation during detection, improving accuracy. Furthermore, through bidirectional detection in both horizontal and vertical directions, the horizontal and vertical spraying trajectories intertwine, revealing the edges of recessed and raised areas, further enhancing detection accuracy.

[0009] Furthermore, the guide frame includes two mounting plates disposed on corresponding workbenches. Several support plates are disposed between adjacent mounting plates within the same guide frame. Each support plate has a rotating shaft fixed at both ends, parallel to the support frame. Two symmetrically distributed support shafts are disposed between adjacent support plates, parallel to the rotating shafts. Plates are symmetrically hinged to both sides of each support shaft, and the ends of the plate are detachably hinged to the corresponding support shafts. The mounting plates and support plates have the same width and thickness, with the thickness of the plate being half the thickness of the support plate. Slide grooves are provided at both ends of each support plate, and adjusting blocks slide within these grooves. Positioning pins are disposed between the adjusting blocks and the slide grooves. Two support rods are rotatably connected to each adjusting block, and these support rods are rotatably connected to the sidewalls of the corresponding plate.

[0010] In this solution, the detection distance is confirmed, and the positioning pins on the corresponding adjustment blocks of the plate within that distance are removed. The guide frame at that distance can then be unfolded by moving the moving table, while the remaining parts of the guide frame remain folded. This solution utilizes a support plate, and the unfolded plate forms a flat plane. Compared to existing telescopic structures (such as multi-stage telescopic rods), this reduces the height difference between different parts, preventing vibrations during sliding and ensuring the accuracy of the detection structure. Furthermore, the support rods provide support to the plate, preventing the guide frame from bending downwards.

[0011] Furthermore, each adjacent mounting plate on the same workbench is fixed with an adjustment seat, and each adjustment seat is provided with a movable seat below it. The movable seat and the corresponding adjustment seat are connected by two second telescopic rods via ball joints. Each movable seat is provided with two guide rails below it. One end of each guide rail is rotatably connected to the workbench. Each guide rail is slidably connected with a support. The top of each support is rotatably connected to the movable seat with a vertically arranged connecting rod. Each guide rail and the workbench, as well as the support and the corresponding guide rail, are detachably connected by pins.

[0012] In this solution, the orientation of the guide frame can be adjusted by rotating the guide rail and sliding the support, thus adjusting the detection direction. In addition, the four second telescopic rods are arranged in a rectangle. When the bridge surface is uneven, causing the moving platform to tilt, one of the second telescopic rods remains unchanged as a fulcrum, while the second telescopic rod diagonally opposite the fulcrum extends and retracts. The other two second telescopic rods extend and retract in coordination, thereby adjusting the tilt angle of the two guide frames, keeping the guide frames horizontal, and ensuring that the detection structure is horizontal during movement, thereby reducing detection errors and improving detection accuracy.

[0013] Furthermore, the sliding structure includes a cylinder that is slidably sleeved on the mounting plate, and the two ends of the support frame are respectively fixedly connected to the corresponding side walls of the cylinder; rollers are provided at the upper and lower ends of the inner wall of the cylinder, and a drive motor for driving the rollers to rotate is provided on the inner wall of the cylinder; baffles are provided on both the upper and lower end faces of the mounting plate and the support plate, and a limiting plate opposite to the baffle is provided on the end face of the plate.

[0014] In this solution, baffles and limit plates are used to restrict and guide the rollers, ensuring that the sliding structure moves in the same direction as the guide frame, thus avoiding detection errors.

[0015] Furthermore, the spraying device includes a liquid storage tank, which contains two liquid storage chambers containing pigments of different colors. Each liquid storage chamber has a through hole at its bottom. A sealing groove is coaxially arranged in the middle of the through hole, and a sealing plate is slidably arranged in the sealing groove. An installation cavity is opened on one side of each sealing groove, and a third telescopic rod electrically connected to the controller is arranged in each installation cavity. The end of the third telescopic rod is connected and fixed to the corresponding sealing plate.

[0016] In this design, when the support rod moves to a recessed area, the pressure sensor detects a decrease in pressure. The controller then controls a third telescopic rod in one of the mounting cavities to move the corresponding sealing plate into the cavity, allowing pigment to flow through the through-hole and complete the spraying operation in the recessed area. When the pressure recovers, the controller controls the corresponding third telescopic rod to reset the corresponding sealing plate, effectively stopping further pigment spraying. When the support rod moves to a raised area, the pressure sensor detects an increase in pressure. The controller then controls a third telescopic rod in another mounting cavity to move the corresponding sealing plate into the cavity, allowing pigment to flow through the through-hole and complete the spraying operation in the raised area. When the pressure recovers, the controller controls the corresponding third telescopic rod to reset the corresponding sealing plate, effectively stopping further pigment spraying. Furthermore, the greater the degree of depression or convexity of the bridge deck, the greater the pressure change detected by the pressure sensor. Consequently, the controller controls a greater degree of contraction of the third telescopic rod, resulting in a larger opening range for the through-hole, allowing more pigment to flow out and making the spray marks more noticeable and easier to distinguish.

[0017] Furthermore, rubber blocks are provided between the ends of the plate and the support plate.

[0018] Furthermore, each of the mobile platforms is equipped with brush bristles at its bottom.

[0019] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0020] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 for Figure 1Enlarged view of point B in the middle;

[0024] Figure 4 for Figure 1 Enlarged view of point C in the middle;

[0025] Figure 5 This is a longitudinal sectional view of the liquid storage tank in an embodiment of the present invention.

[0026] The following components are labeled in the attached diagram: 1. Moving platform; 2. Casters; 3. Vacuum suction cup; 4. Worktable; 5. Support frame; 6. First telescopic rod; 7. Support rod; 8. Mounting plate; 9. Support plate; 10. Rotating shaft; 11. Support shaft; 12. Plate; 13. Adjusting block; 14. Support rod; 15. Fixed seat; 16. Moving seat; 17. Second telescopic rod; 18. Guide rail; 19. Support; 20. Connecting rod; 21. Cylinder; 22. Roller; 23. Drive motor; 24. Liquid storage tank; 25. Sealing plate; 26. Third telescopic rod; 27. Baffle; 28. Limiting plate; 29. ​​Support elastic element. Detailed Implementation

[0027] like Figures 1-5 As shown:

[0028] A device for detecting the flatness of bridge construction based on the Internet of Things includes two symmetrically arranged movable platforms 1. Each movable platform 1 has several casters 2 and vacuum suction cups 3 at its bottom. A worktable 4 is coaxially rotatably connected to the top of each movable platform 1. A locking pin (a conventional technique, not shown in the figure) detachably connects the worktable 4 to the movable platform 1. Two sets of telescopic guide frames are arranged between the opposing ends of the worktables 4. Each guide frame has a sliding structure, and a detection structure is arranged between the sliding structures. The detection structure includes… A support frame 5 is connected to a corresponding sliding structure at both ends. Several vertically downward first telescopic rods 6 are provided on the support frame 5. Support rods 7 are slidably connected to the ends of the telescopic rods. An elastic support member is provided between the support rods 7 and the ends of the telescopic rods. Each end of the support rod 7 is provided with a pressure sensor (a conventional technical means, so it is not shown in the figure) for detecting the pressure on the end of the support rod 7. A spraying device is provided on one side of the support rod 7. A controller (a conventional technical means, so it is not shown in the figure) is provided on the support frame 5 and connected to the pressure sensor and the spraying device.

[0029] In this scheme, the vacuum suction cup 3 on one of the moving platforms 1 is attached to the bridge surface. Then, the other moving platform 1 is moved. When the other moving platform 1 moves to the desired position, the vacuum suction cup 3 on the first moving platform 1 is attached to the bridge surface. At this time, the guide frame expands with the movement of the moving platform 1. By controlling the extension and retraction of the first telescopic rod 6, the support rod 7 is pressed tightly against the bridge surface under the action of the elastic support member, so that the end of the support rod 7 is subjected to a certain pressure. Then, the sliding structure drives the support frame 5 to move along the guide frame. The support frame 5 drives the support rod 7 to move synchronously through the first telescopic rod 6, and the controller is activated. When the support rod 7 contacts the concave or convex areas of the bridge surface, the pressure on the end of the support rod 7 increases or decreases. When the pressure sensor detects the pressure change, the controller controls the corresponding spraying device to spray and indicate the concave or convex areas of the bridge surface. In addition, after horizontal transverse detection, the vacuum suction cup 3 at the bottom of one of the moving platforms 1 is released, the locking pin on the other moving platform 1 is removed, and the corresponding worktable 4 is rotated to adjust the guide frame to the horizontal longitudinal direction for horizontal longitudinal detection.

[0030] This solution utilizes the guide frame of the telescopic structure between the moving stages 1 to guide the moving stage 1 and the support frame 5, preventing the moving stage 1 from deviating during the movement and detection process. This allows for precise control of the orientation during the detection process, improving detection accuracy. Furthermore, through bidirectional detection in both horizontal and vertical directions, the horizontal spraying trajectory intertwines with the vertical spraying trajectory, thereby revealing the edges of recessed and raised areas, further enhancing detection accuracy.

[0031] In this embodiment, the guide frame includes two mounting plates 8 disposed on corresponding workbenches 4. Several support plates 9 are disposed between adjacent mounting plates 8 within the same guide frame. Both ends of each support plate 9 are fixed with a rotating shaft 10 parallel to the support frame 5. Two vertically symmetrically distributed support shafts 11 are disposed between adjacent support plates 9. The support shafts 11 are parallel to the rotating shafts 10. Plates 12 are symmetrically hinged to both sides of each support shaft 11. The ends of the plates 12 are detachably hinged to the corresponding support shafts 11. The mounting plates 8 and support plates 9 have the same width and thickness. The thickness of the plate 12 is half the thickness of the support plate 9. Slide grooves are provided at both ends of each support plate 9. Adjusting blocks 13 slide within each slide groove. A positioning pin is disposed between the adjusting block 13 and the slide groove. Two support rods 14 are rotatably connected to each adjusting block 13. The support rods 14 are rotatably connected to the side wall of the corresponding plate 12.

[0032] In this solution, after confirming the detection distance, the positioning pins on the corresponding adjusting blocks 13 of the plate 12 within the corresponding distance are removed. The guide frame at the corresponding distance can be unfolded by moving the moving stage 1, while the rest of the guide frame remains folded. In this solution, the support plate 9 and the unfolded plate 12 form a flat plane. Compared with existing telescopic structures (such as multi-stage telescopic rods), this reduces the height difference between various parts and avoids shaking during the sliding process of the sliding structure, which would affect the detection accuracy of the detection structure. In addition, the support rod 14 can provide a certain degree of support for the plate 12, preventing the guide frame from bending and deforming downwards.

[0033] In this embodiment, an adjustment seat is fixed between adjacent mounting plates 8 on the same workbench 4. A movable seat 16 is provided below each adjustment seat. Two second telescopic rods 17 are ball-jointed between the movable seat 16 and the corresponding adjustment seat. Two guide rails 18 are provided below each movable seat 16. One end of each guide rail 18 is rotatably connected to the workbench 4. A support 19 is slidably connected to each guide rail 18. A vertically arranged connecting rod 20 is rotatably connected between the top of each support 19 and the movable seat 16. Pins are detachably connected between the guide rail 18 and the workbench 4, and between the support 19 and the corresponding guide rail 18.

[0034] In this scheme, the orientation of the guide frame can be adjusted by rotating the guide rail 18 and sliding the support 19, that is, the detection direction can be adjusted. In addition, the four second telescopic rods 17 are distributed in a rectangle. When the bridge surface is uneven, causing the moving table 1 to tilt, one of the second telescopic rods remains unchanged as the fulcrum, and the second telescopic rod 17 diagonally opposite the fulcrum extends and retracts. The other two second telescopic rods 17 extend and retract in coordination, which can adjust the tilt angle of the two guide frames, keep the guide frames horizontal, and thus ensure that the detection structure is horizontal during the movement, thereby reducing detection error and improving detection accuracy.

[0035] In this embodiment, the sliding structure includes a cylindrical body 21 slidably sleeved on the mounting plate 8, and the two ends of the support frame 5 are respectively fixedly connected to the side walls of the corresponding cylindrical body 21; rollers 22 are provided at the upper and lower ends of the inner wall of the cylindrical body 21, and a drive motor 23 for driving the rollers 22 to rotate is provided on the inner wall of the cylindrical body 21; baffles 27 are provided on both sides of the upper and lower end faces of the mounting plate 8 and the support plate 9, and a limiting plate 28 opposite to the baffle 27 is provided on the end face of the plate 12.

[0036] In this scheme, the baffle 27 and the limiting plate 28 are used to restrict and guide the roller 22, ensuring that the sliding structure moves in the same direction as the guide frame, thus avoiding detection errors.

[0037] In this embodiment, the spraying device includes a liquid storage tank 24, which contains two liquid storage chambers containing pigments of different colors. Each liquid storage chamber has a through hole at its bottom. A sealing groove is coaxially arranged in the middle of the through hole, and a sealing plate 25 is slidably arranged in the sealing groove. An installation cavity is opened on one side of each sealing groove, and a third telescopic rod 26 electrically connected to the controller is arranged in each installation cavity. The end of the third telescopic rod 26 is connected and fixed to the corresponding sealing plate.

[0038] In this design, when the support rod 7 moves to the recessed area, the pressure sensor detects a decrease in pressure. The controller then controls the third telescopic rod 26 in one of the mounting cavities to move the corresponding sealing plate 25 into the mounting cavity, allowing the paint to flow down through the through hole to complete the spraying operation in the recessed area. When the pressure recovers, the controller controls the corresponding third telescopic rod 26 to reset the corresponding sealing plate 25, effectively stopping the paint from continuing to spray. When the support rod 7 moves to the raised area, the pressure sensor detects an increase in pressure. The controller then controls the third telescopic rod 26 in another mounting cavity to move the corresponding sealing plate 25 into the mounting cavity, allowing the paint to flow down through the through hole to complete the spraying operation in the raised area. When the pressure recovers, the controller controls the corresponding third telescopic rod 26 to reset the corresponding sealing plate 25, effectively stopping the paint from continuing to spray. Furthermore, the greater the degree of depression or convexity of the bridge deck, the greater the pressure change detected by the pressure sensor. Consequently, the controller controls the third telescopic rod 26 to contract more, resulting in a larger opening range for the through hole, allowing more paint to flow out and making the spray marks more noticeable for easier identification.

[0039] In this embodiment, rubber blocks (a conventional technique, so they are not shown in the figure) are provided between the ends of the plate 12 and the support plate 9.

[0040] By setting rubber blocks, the deformable properties of the rubber blocks are used to fill the gap between the plate 12 and the support plate 9, further preventing shaking during the movement of the sliding structure.

[0041] In this embodiment, the bottom of each mobile platform 1 is provided with bristles (a conventional technique, so they are not shown in the figure).

[0042] By setting up brush bristles, the bridge surface can be cleaned during the movement of the mobile platform 1, preventing debris such as gravel from affecting the test results.

[0043] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A device for detecting the flatness of bridges during construction based on the Internet of Things, characterized in that: The device includes two symmetrically arranged movable platforms, each equipped with several casters and vacuum suction cups at its bottom. A worktable is coaxially rotatably connected to the top of each platform, and a locking pin detachably connects the worktable and the movable platform. Two sets of telescopic guide frames are arranged between the opposing ends of the worktables. Each guide frame has a sliding structure, and a detection structure is arranged between the sliding structures. The detection structure includes a support frame with both ends connected to the corresponding sliding structure. Several vertically downward-pointing first telescopic rods are arranged on the support frame, and a support rod is coaxially slidably connected to the end of each first telescopic rod. Elastic support members are provided between the support rods, and pressure sensors are provided at the ends of the support rods to detect the pressure on the ends of the support rods. A spraying device is provided on one side of each support rod, and a controller connected to the pressure sensors and the spraying device is provided on the support frame. Through bidirectional detection in both horizontal and vertical directions, the horizontal spraying trajectory and the vertical spraying trajectory are intertwined, thereby revealing the edges of concave and convex areas. After horizontal detection, the suction of the vacuum suction cup at the bottom of one of the moving stages is released, the locking pin on the other moving stage is removed, and the corresponding worktable is rotated to adjust the guide frame to the horizontal direction for horizontal detection. The guide frame includes two mounting plates set on corresponding workbenches. Several support plates are arranged between adjacent mounting plates within the same guide frame. Each support plate has a rotating shaft fixed at both ends, parallel to the support frame. Two symmetrically distributed support shafts are arranged between adjacent support plates, parallel to the rotating shafts. Plates are symmetrically hinged to both sides of each support shaft, and the ends of the plate are detachably hinged to the corresponding support shafts. The mounting plates and support plates have the same width and thickness, with the thickness of the plate being half the thickness of the support plate. Slide grooves are provided at both ends of each support plate, and adjusting blocks slide within these grooves. Positioning pins are provided between the adjusting blocks and the slide grooves. Two support rods are rotatably connected to each adjusting block, with the other ends of the two support rods rotatably connected to the upper and lower plates respectively. After confirming the detection distance, the positioning pins on the corresponding adjusting blocks within the detection distance are removed. The guide frame corresponding to the detection distance is unfolded by moving the moving table, while the remaining parts of the guide frame remain folded, forming a flat plane using the support plates and the unfolded plates. Adjustable seats are fixed between adjacent mounting plates on the same workbench. Each adjustable seat has a movable seat below it. Two second telescopic rods are ball-jointed between the movable seat and its corresponding adjustable seat. Two guide rails are located below each movable seat. One end of each guide rail is rotatably connected to the workbench. A support is slidably connected to each guide rail. A vertically arranged connecting rod is rotatably connected between the top of each support and the movable seat. Pins are detachably connected between the guide rail and the workbench, and between the support and its corresponding guide rail. The orientation of the guide frame is adjusted by rotating the guide rails and sliding the supports. The sliding structure includes a cylinder that is slidably sleeved on the mounting plate, and the two ends of the support frame are respectively fixedly connected to the corresponding side walls of the cylinder; rollers are provided at the upper and lower ends of the inner wall of the cylinder, and a drive motor for driving the rollers to rotate is provided on the inner wall of the cylinder; baffles are provided on both the upper and lower end faces of the mounting plate and the support plate, and a limiting plate opposite to the baffle is provided on the end face of the plate; The spraying device includes a liquid storage tank with two storage chambers containing pigments of different colors. Each storage chamber has a through-hole at its bottom. A sealing groove is coaxially arranged in the center of each through-hole, and a sealing plate is slidably mounted within the sealing groove. Each side of the sealing groove has an installation cavity containing a third telescopic rod electrically connected to a controller. The end of the third telescopic rod is fixedly connected to a corresponding sealing plate. The greater the degree of depression or convexity of the bridge surface, the greater the pressure change detected by the pressure sensor. Consequently, the controller controls the third telescopic rod to contract more, widening the opening range of the through-holes. This results in more pigment flowing out, making the spray marks more noticeable and easier to distinguish. Rubber blocks are provided between the ends of the plate and the support plate.

2. The device for detecting the flatness of bridges based on the Internet of Things according to claim 1, characterized in that: The bottom of each mobile platform is equipped with brush bristles.

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