A highway tunnel top surface detection device based on machine vision

Abstract

The utility model discloses a highway tunnel top surface detection equipment based on machine vision, including moving trolley, the upper surface fixed mounting of moving trolley has the fixed frame of vertical setting, and the lateral surface of fixed frame is equipped with the sliding slot, and the sliding block is slidably arranged in the sliding slot, and the inside installation of moving trolley has the drive motor. Staff pushes moving trolley and moves in the highway tunnel, and the corresponding switch etc. on the operation display, through drive motor drive screw rod rotation, can drive sliding block and lifting rod and lifting platform lift, thereby drive camera to lift to appropriate position, and the top surface of highway tunnel carries out visual inspection, and staff can observe the picture shot through the display arranged on moving trolley, thereby judges whether the top surface of highway tunnel exists the defect, and does not need staff to stand on the moving trolley and look up to observe the top surface of highway tunnel, and the labor burden is light, and the detection efficiency is high, and the falling risk of high-altitude operation is avoided, and the safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering inspection technology, specifically a machine vision-based inspection device for the top surface of highway tunnels. Background Technology

[0002] Highway tunnel roof inspection refers to the process of inspecting and evaluating the structural integrity, surface condition, and potential defects of the tunnel roof using technical means. Its core purpose is to ensure the construction quality, operational safety, and long-term maintenance of the tunnel. Highway tunnel roof inspection is a crucial link in ensuring tunnel construction quality and operational safety. Existing inspection methods typically involve workers climbing to high-altitude work platforms or inspection trolleys to observe the tunnel roof surface closely with the naked eye or simple tools. This method has drawbacks such as a high risk of fall, and manual inspection is labor-intensive and inefficient. Therefore, we propose a highway tunnel roof inspection device based on machine vision. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a highway tunnel top surface inspection device based on machine vision. Workers can observe the captured images through a monitor set on a mobile trolley to determine whether there are defects on the highway tunnel top surface. It eliminates the need for workers to stand on the mobile trolley and look up to observe the highway tunnel top surface, thus reducing the workload, increasing the inspection efficiency, avoiding the risk of falling from heights, improving safety, and effectively solving the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a machine vision-based highway tunnel top surface inspection device, comprising a mobile trolley, a vertically mounted fixed frame fixedly installed on the upper surface of the mobile trolley, a sliding groove opened on the side surface of the fixed frame, a slider slidably arranged in the sliding groove, a drive motor installed inside the mobile trolley, the output shaft of the drive motor passing through the sliding groove and connected to a drive screw through a coupling, the drive screw being rotatably arranged inside the sliding groove, and the drive screw being threadedly connected to a screw hole opened on the upper surface of the slider, two lifting rods symmetrically arranged on both sides of the upper surface of the slider, the top end of the lifting rods passing through the upper surface of the fixed frame and connected to a lifting platform, a camera installed on the upper surface of the lifting platform, and a display corresponding to the camera installed on the upper surface of the mobile trolley.

[0005] As a preferred technical solution of this utility model, a number of lighting lamps are evenly arranged around the camera on the upper surface of the lifting platform.

[0006] As a preferred embodiment of this utility model, the mobile trolley is provided with wheel frames at the four corners of its lower surface, and the wheel frames are respectively provided with omnidirectional wheels and foot brakes.

[0007] As a preferred embodiment of this utility model, the mobile trolley is provided with wheel frames at the four corners of its lower surface, and the wheel frames are respectively provided with omnidirectional wheels and foot brakes.

[0008] As a preferred technical solution of this utility model, the upper surface of the lifting platform is provided with an installation groove on the side away from the camera. A rhomboid rotating block is rotatably arranged inside the installation groove. The four corners of the rotating block are all rounded. A fixed seat is installed on the upper side of the installation groove on the upper surface of the lifting platform. A circular through groove is provided on the upper surface of the fixed seat. A sliding cylinder is slidably arranged in the circular through groove. A roller is rotatably arranged at the bottom end of the sliding cylinder, which contacts the surface of the rotating block. The axis of the roller and the axis of rotation of the rotating block are on the same vertical line. A marker pen is installed inside the sliding cylinder, with the pen tip facing upward.

[0009] As a preferred technical solution of this utility model, the lower side of the rotating block away from the camera is fixedly connected to the pull rope, and the other end of the pull rope is fixedly mounted on the moving trolley; the rotating shaft of the rotating block passes through the cavity inside the lifting platform, and a torsion spring is provided on the outside of the rotating shaft, and the torsion spring is located inside the cavity.

[0010] As a preferred embodiment of this utility model, the side surface of the fixing frame is evenly provided with a number of fixing rings, and the pull rope passes through the number of fixing rings in sequence.

[0011] As a preferred technical solution of this utility model, an upper limit rod and a lower limit rod are fixedly provided on the inner side of the mounting groove. The upper limit rod is located on the upper side of the rotating block away from the camera, and the lower limit rod is located on the lower side of the rotating block near the camera.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: Workers push the mobile trolley to move inside the highway tunnel, operate the corresponding switches on the display, etc., and drive the drive screw to rotate via the drive motor. This drives the slider, lifting rod, and lifting platform to rise and fall, thereby raising and lowering the camera to a suitable position for visual inspection of the tunnel ceiling. Workers can observe the captured images on the display set on the mobile trolley to determine if there are any defects on the tunnel ceiling. This eliminates the need for workers to stand on the mobile trolley and look up at the tunnel ceiling, reducing workload, increasing inspection efficiency, and avoiding the risk of falls from heights, thus improving safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a side view of the structure of this utility model;

[0015] Figure 3 This is a front view structural diagram of the present utility model;

[0016] Figure 4 This utility model Figure 1 Enlarged view of the structure at point A;

[0017] Figure 5 This is a partial structural schematic diagram of the present invention.

[0018] In the diagram: 1. Moving trolley, 2. Fixed frame, 3. Slide rail, 4. Slider, 5. Drive screw, 6. Lifting rod, 7. Lifting platform, 8. Camera, 9. Lighting lamp, 10. Monitor, 11. Push handle, 12. Casters, 13. Foot brake, 14. Mounting slot, 15. Rotating block, 16. Fixed seat, 17. Sliding cylinder, 18. Roller, 19. Marker, 20. Pull rope, 21. Upper limit rod, 22. Lower limit rod, 23. Fixing ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-5 This utility model provides a technical solution: a machine vision-based highway tunnel top surface inspection device, including a mobile trolley 1. The mobile trolley 1 is equipped with a rechargeable battery, such as a lithium-ion battery or a lead-acid battery, to power the inspection device. A vertically mounted mounting frame 2 is fixedly installed on the upper surface of the mobile trolley 1. The side surface of the mounting frame 2 has open sliding grooves 3 on both sides. A slider 4 is slidably mounted within the sliding grooves 3, moving up and down within the grooves 3. A drive motor is installed inside the mobile trolley 1. The output shaft of the drive motor passes through the sliding grooves 3 and is connected to a drive screw 5 via a coupling. The drive screw 5 is vertically mounted and rotatably mounted inside the sliding grooves 3, with its top end connected to a bearing mounted on the top plate of the mounting frame 2. The drive screw 5 is threadedly connected to the screw hole on the upper surface of the slider 4. Two lifting rods 6 are symmetrically arranged on both sides of the upper surface of the slider 4. The top of the lifting rod 6 passes through the upper surface of the fixed frame 2 and is connected to the lifting platform 7. A camera 8 is installed on the upper surface of the lifting platform 7 for shooting and detecting the top surface of the highway tunnel. The camera 8 can be a commonly used industrial camera. The captured images can be transmitted to the processor set in the mobile trolley 1. The processor calls the preset program to analyze and determine whether there are defects on the top surface of the highway tunnel, thereby realizing automated machine vision for detecting defects on the top surface of the highway tunnel.

[0021] Camera 8 can also be a regular camera, capturing images of the tunnel ceiling and transmitting the images to a display 10 mounted on the upper surface of the mobile trolley 1. The display 10 can be a common touchscreen to improve human-machine interaction. Workers can observe the captured images on the display 10 to determine if there are any defects on the tunnel ceiling. This eliminates the need for workers to stand on the mobile trolley and look up at the tunnel ceiling, reducing workload, increasing inspection efficiency, avoiding the risk of falls from heights, and improving safety.

[0022] During the inspection, the staff pushes the mobile trolley 1 to move inside the highway tunnel, operates the corresponding switches on the display 10, etc., and drives the drive screw 5 to rotate through the drive motor, which can drive the slider 4, the lifting rod 6 and the lifting platform 7 to rise and fall, thereby driving the camera 8 to rise and fall to the appropriate position to perform visual inspection of the top surface of the highway tunnel. It is applicable to the inspection of the top surface of highway tunnels at different heights, which greatly improves its universality and flexibility of use.

[0023] In a preferred embodiment, a plurality of illumination lamps 9 are evenly arranged around the camera 8 on the upper surface of the lifting platform 7. These lamps provide auxiliary lighting for the camera 8, improving the accuracy of the detection results. The illumination lamps 9, drive motor, camera 8, display 10, and processor are all powered by a battery within the mobile trolley 1. The processor controls the drive motor, camera 8, and display 10 using methods commonly found in existing technologies. Simultaneously, the illumination lamps 9, camera 8, and drive motor can be switched on and off via corresponding switches or a touchscreen on the display 10.

[0024] The batteries, lighting lamps 9, drive motors, cameras 8, displays 10, and processors used in this application are all commonly used electronic components in the prior art. Their specific structures, working principles, control methods, and circuit connections are all well-known technologies and will not be described in detail here.

[0025] In a preferred embodiment, the mobile trolley 1 is provided with wheel frames at the four corners of its lower surface, and each wheel frame is provided with a swivel wheel 12 and a foot brake 13. A push handle 11 is installed on the side of the mobile trolley 1 closest to the display 10. The mobile trolley 1 is pushed by the push handle 11 and the swivel wheel 12, which drives the camera 8 to detect different positions on the top surface of the highway tunnel. The foot brake 13 allows the mobile trolley 1 to be parked conveniently. The operation is simple and convenient.

[0026] Optional technical solution: The lifting platform 7 is also equipped with a marking component, which includes a rotating block 15, a sliding cylinder 17, and a marker pen 19. A mounting groove 14 is provided on the upper surface of the lifting platform 7 away from the camera 8. The upper and lower sides of the mounting groove 14, as well as the side away from the camera 8, are open. A rhomboid rotating block 15 is rotatably mounted inside the mounting groove 14, rotating around its geometric center. A fixed seat 16 is mounted on the upper side of the mounting groove 14 on the upper surface of the lifting platform 7. A circular through groove is provided on the upper surface of the fixed seat 16. A sliding cylinder 17 is slidably mounted inside the circular through groove. A roller 18 is rotatably mounted at the bottom end of the sliding cylinder 17, contacting the surface of the rotating block 15. The axis of the roller 18 and the axis of rotation of the rotating block 15 are on the same vertical line. A marker pen 19 is installed inside the sliding cylinder 17, with the tip of the marker pen facing upwards. When the rotating block 15 rotates, because the distances of its various parts to its rotation center are different, it can drive the roller 18 to rotate and drive the sliding cylinder 17 to move up and down during the rotation process, thereby driving the marker pen 19 to move up and down, so that its pen tip moves to the top surface of the highway tunnel to mark the location of defects on the top surface, so as to facilitate the repair work after inspection.

[0027] The tip of marker 19 can be cross-shaped or circular, so that staff can easily observe it after marking.

[0028] Optionally, the lower side of the rotating block 15 away from the camera 8 is fixedly connected to the pull rope 20, and the other end of the pull rope 20 is fixedly mounted on the mobile trolley 1. After the staff sees the top surface defect captured by the camera 8 through the display 10, they can rotate the rotating block 15 by pulling the bottom end of the pull rope 20, thereby driving the sliding cylinder 17 and the marker pen 19 to move upward and mark the area near the defect.

[0029] The rotating shaft of the rotating block 15 passes into the cavity inside the lifting platform 7, and a torsion spring is provided on the outside of the rotating shaft. The torsion spring is located in the cavity, and the cavity is provided with corresponding clips at both ends of the torsion spring. After pulling the pull rope 20 to rotate the rotating block 15, the pull rope 20 is released, and the rotating block 15 can rotate in the opposite direction to return to its original position under the elastic force of the torsion spring.

[0030] Furthermore, all four corners of the rotating block 15 are rounded, making it easier for the rotating block 15 to rotate and drive the sliding cylinder 17 to rise and fall smoothly through the roller 18, and making it less likely to get stuck.

[0031] Optionally, the side surface of the fixed frame 2 is evenly provided with a number of fixing rings 23. The pull rope 20 passes through the number of fixing rings 23 in sequence. The fixing rings 23 limit and fix the pull rope 20 to prevent it from moving too far away from the fixed frame 2 or even getting caught in the caster wheel 12 as the lifting platform 7 rises and falls, thus ensuring the smooth progress of the detection and marking process.

[0032] Optionally, an upper limit rod 21 and a lower limit rod 22 are fixedly installed inside the mounting groove 14. The upper limit rod 21 is located on the upper side of the rotating block 15 away from the camera 8, and is used to limit the rotating block 15 to remain horizontal without being pulled, thereby keeping the marker pen 19 at its lowest position. The lower limit rod 22 is located on the lower side of the rotating block 15 near the camera 8, and is used to limit the rotation angle of the rotating block 15, so that it can only rotate from horizontal to vertical, thereby pushing the marker pen 19 to its highest position.

[0033] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machine vision-based highway tunnel top surface inspection device, comprising a mobile trolley (1), characterized in that: The upper surface of the mobile trolley (1) is fixedly mounted with a vertically arranged fixed frame (2). The side surface of the fixed frame (2) is provided with a sliding groove (3). A slider (4) is slidably arranged in the sliding groove (3). The mobile trolley (1) is equipped with a drive motor. The output shaft of the drive motor passes through the sliding groove (3) and is connected to the drive screw (5) through a coupling. The drive screw (5) is rotatably arranged inside the sliding groove (3). The drive screw (5) is threadedly connected to the screw hole opened on the upper surface of the slider (4). Two lifting rods (6) are symmetrically arranged on both sides of the upper surface of the slider (4). The top of the lifting rod (6) passes through the upper surface of the fixed frame (2) and is connected to the lifting platform (7). A camera (8) is installed on the upper surface of the lifting platform (7). A display (10) corresponding to the camera (8) is installed on the upper surface of the mobile trolley (1).

2. The machine vision-based highway tunnel top surface inspection device according to claim 1, characterized in that: The upper surface of the lifting platform (7) is evenly equipped with several lighting lamps (9) around the camera (8).

3. The machine vision-based highway tunnel top surface inspection device according to claim 1, characterized in that: The mobile trolley (1) is equipped with wheel frames at the four corners of its lower surface, and omnidirectional wheels (12) and foot brakes (13) are respectively installed on the wheel frames.

4. The machine vision-based highway tunnel top surface inspection device according to claim 3, characterized in that: A pusher (11) is installed on the side surface of the mobile trolley (1) near the display (10).

5. The machine vision-based highway tunnel top surface inspection device according to claim 1, characterized in that: The upper surface of the lifting platform (7) is provided with an installation groove (14) on the side away from the camera (8). A rhomboid rotating block (15) is rotatably arranged inside the installation groove (14). The four corners of the rotating block (15) are all rounded. A fixed seat (16) is installed on the upper side of the installation groove (14) on the upper surface of the lifting platform (7). A circular through groove is provided on the upper surface of the fixed seat (16). A sliding cylinder (17) is slidably arranged in the circular through groove. A roller (18) is rotatably arranged at the bottom end of the sliding cylinder (17) and contacts the surface of the rotating block (15). The axis of the roller (18) and the axis of rotation of the rotating block (15) are on the same vertical line. A marker pen (19) is installed in the sliding cylinder (17). The tip of the marker pen (19) is set upward.

6. The machine vision-based highway tunnel top surface inspection device according to claim 5, characterized in that: The lower side of the rotating block (15) away from the camera (8) is fixedly connected to the pull rope (20), and the other end of the pull rope (20) is fixedly mounted on the moving trolley (1); the rotating shaft of the rotating block (15) passes into the cavity inside the lifting platform (7), and a torsion spring is provided on the outside of the rotating shaft, and the torsion spring is located in the cavity.

7. The machine vision-based highway tunnel top surface inspection device according to claim 6, characterized in that: The side surface of the fixing frame (2) is evenly provided with several fixing rings (23), and the pull rope (20) passes through several fixing rings (23) in sequence.

8. The machine vision-based highway tunnel top surface inspection device according to claim 7, characterized in that: The upper limit rod (21) and the lower limit rod (22) are fixedly installed on the inner side of the mounting groove (14). The upper limit rod (21) is located on the upper side of the rotating block (15) away from the camera (8), and the lower limit rod (22) is located on the lower side of the rotating block (15) close to the camera (8).

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