Crack detection device for bridge steel structure

Abstract

The utility model discloses a crack detection device for a bridge steel structure, which relates to the technical field of bridge detection devices and comprises a base, a top seat is arranged at the upper end of the base, a height adjusting mechanism is mounted between the top seat and the base, and the height adjusting mechanism is used for adjusting the height of the top seat; the crack detection device for the bridge steel structure comprises a top seat, a slide way is fixedly installed on the top seat, sliding grooves are formed in the two sides of the interior of the slide way, a movable seat is arranged in the slide way, sliding blocks are fixed to the two sides of the movable seat, the sliding blocks are arranged in the slide way in a sliding mode, and an image detection device is fixedly installed at the top of the movable seat. The image detection device is driven by the motor to intermittently move to different positions of the bridge steel structure, and when the image detection device moves to one position, the image detection device stays still for a period of time and carries out shooting work. Therefore, manual movement of the image detection device is replaced, the time and energy of workers are saved, the detection efficiency is effectively improved, and the detection cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge inspection devices, and in particular to a crack detection device for bridge steel structures. Background Technology

[0002] During long-term operation, bridge steel structures may develop cracks due to various loads and environmental factors. These cracks not only affect the aesthetics and durability of the bridge, but more importantly, they can reduce its load-bearing capacity and even lead to serious safety accidents. Therefore, crack detection of bridge steel structures is of great significance.

[0003] Existing technologies utilize image detection devices to detect cracks in bridge steel structures. These devices are based on image detection technology, which primarily relies on machine vision. An image acquisition device converts the object to be detected into an image signal, which is then transmitted to a dedicated image processing system. The image processing system converts these image signals into digital signals based on pixel distribution, brightness, color, and other information, and performs various calculations to extract the target's features. Finally, based on a preset crack appearance condition, the image processing system outputs a result, indicating whether the crack is acceptable or unacceptable, thus achieving automatic identification.

[0004] The image detection device comprises a camera for capturing images and converting them into image signals. It also includes an image acquisition card for receiving image signals from the camera, converting them into digital format, and then transmitting them to an image processing system for further processing. The image processing system consists of both hardware and software components; the hardware processes the image data, while the software handles algorithm implementation and result output. The image processing system performs various calculations and analyses on the received digital images to extract target features and output results. Finally, a display monitor shows the images captured by the image acquisition device and the results output by the image processing system, facilitating real-time monitoring and judgment by the operator.

[0005] However, due to the length of bridge steel structures, the actual inspection process requires manual movement of the inspection equipment to different locations on the steel structure. Manually moving the inspection equipment consumes a lot of time and effort, especially on large bridges, where staff spend a lot of time moving the inspection equipment, which greatly reduces inspection efficiency, increases inspection costs, and extends the inspection cycle. Therefore, we propose a crack detection device for bridge steel structures. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a crack detection device for bridge steel structures, which solves the problems mentioned in the background.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a crack detection device for bridge steel structures, comprising: a base, a top seat provided at the upper end of the base, and a height adjustment mechanism installed between the top seat and the base, the height adjustment mechanism being used to adjust the height of the top seat;

[0008] A slide rail is fixedly installed on the top seat. Slide grooves are provided on both sides of the slide rail. A movable seat is provided inside the slide rail. Slider blocks are fixed on both sides of the movable seat and slidably disposed within the slide rail. An image detection device is fixedly installed on the top of the movable seat, with its camera lens facing upwards. A lead screw is rotatably installed inside the slide rail, passing through the movable seat and threadedly connected to it. A connecting shaft is rotatably installed outside the slide rail, fixedly connected to the lead screw. A driven wheel is fixedly installed at the end of the connecting shaft. A motor is fixedly installed on the top seat, and an incomplete gear is fixedly installed at the output shaft end of the motor, meshing with the driven wheel.

[0009] As a further technical solution of this utility model, a dust cover is installed on the outside of the motor.

[0010] As a further technical solution of this utility model, the height adjustment mechanism includes a guide groove formed at the bottom of the top seat. The guide groove is a cross groove with a cross-shaped cross section. Two movable blocks are slidably arranged in the guide groove at intervals. It also includes a first connecting rod and a second connecting rod located between the top seat and the base. The first connecting rod and the second connecting rod are arranged crosswise and hinged together at the intersection. The upper ends of the first connecting rod and the second connecting rod are respectively hinged to the two movable blocks, and the lower end of the first connecting rod is hinged to the base.

[0011] As a further technical solution of this utility model, the height adjustment mechanism also includes a groove formed on the base, a bottom block provided in the groove, and the lower end of the second connecting rod is hinged to the bottom block.

[0012] As a further technical solution of this utility model, two spaced guide rods are fixedly installed in the groove, the guide rods penetrate the bottom block, and a screw is rotatably installed in the groove, the screw penetrates the bottom block and is threadedly connected to the bottom block.

[0013] As a further technical solution of this utility model, a turntable is rotatably mounted on one end of the base, and the rotating shaft of the turntable is fixedly connected to the screw.

[0014] This utility model provides a crack detection device for bridge steel structures, which has the following advantages compared with the prior art:

[0015] 1. This design discloses a crack detection device for bridge steel structures. A motor drives an image detection device to intermittently move to different locations on the bridge steel structure. When the image detection device reaches a location, it remains stationary for a period of time and takes an image. This replaces manual movement of the image detection device, saving time and effort for staff, effectively improving detection efficiency and reducing detection costs.

[0016] 2. The crack detection device for bridge steel structures designed in this paper moves the top seat upward by bringing the upper ends of the second connecting rod and the first connecting rod closer together and the two movable blocks closer together. This moves the image detection device upward. Conversely, when the lower end of the second connecting rod moves away from the lower end of the first connecting rod, it moves the image detection device downward. Therefore, the height of the image detection device can be adjusted according to the height of the bridge. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the operation of a crack detection device for bridge steel structures.

[0018] Figure 2 This is a schematic diagram of a crack detection device for bridge steel structures.

[0019] Figure 3 This is an enlarged sectional view of a portion of the structure of the top seat and slide of a crack detection device for bridge steel structures.

[0020] Figure 4 An exploded view of the guide groove and movable block of a crack detection device for bridge steel structures;

[0021] Figure 5 This is an enlarged schematic diagram of a portion of the structure of a crack detection device for bridge steel structures, showing the groove.

[0022] Figure 6 A crack detection device for bridge steel structures Figure 2 Enlarged diagram of point A in the diagram.

[0023] In the diagram: 1. Base; 2. Top seat; 3. Slide rail; 4. Movable seat; 5. Slider; 6. Image detection device; 7. Lead screw; 8. Connecting shaft; 9. Driven wheel; 10. Motor; 11. Incomplete gear; 12. Guide groove; 13. Movable block; 14. First connecting rod; 15. Second connecting rod; 16. Groove; 17. Bottom block; 18. Guide rod; 19. Screw; 20. Turntable; 21. Bridge steel structure. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 This utility model provides a technical solution for a crack detection device for bridge steel structures: A crack detection device for bridge steel structures includes: a base 1, a top seat 2 provided on the upper end of the base 1, a height adjustment mechanism installed between the top seat 2 and the base 1, the height adjustment mechanism being used to adjust the height of the top seat 2; a slide rail 3 fixedly installed on the top seat 2, slide grooves provided on both sides of the slide rail 3, a movable seat 4 provided inside the slide rail 3, sliders 5 fixed on both sides of the movable seat 4, the sliders 5 being slidably disposed inside the slide rail 3, an image detection device 6 fixedly installed on the top of the movable seat 4, the imaging lens of the image detection device 6 being positioned upwards, a lead screw 7 rotatably installed inside the slide rail 3, the lead screw 7 passing through the movable seat 4 and threadedly connected to the movable seat 4, a connecting shaft 8 rotatably installed outside the slide rail 3, the connecting shaft 8 being fixedly connected to the lead screw 7, a driven wheel 9 fixedly fixed at the end of the connecting shaft 8, a motor 10 fixedly installed on the top seat 2, an incomplete gear 11 fixedly installed at the output shaft end of the motor 10, the incomplete gear 11 meshing with the driven wheel 9.

[0026] A schematic diagram of the device's operation can be found here. Figure 1 As shown, the device is placed under the bridge, with the camera lens of the image detection device 6 facing the bridge steel structure 21. The image detection device 6 detects cracks in the bridge steel structure 21. Its working principle is primarily based on machine vision technology. The image acquisition device converts the object to be detected into an image signal, which is then transmitted to a dedicated image processing system. The image processing system converts these image signals into digital signals based on information such as pixel distribution, brightness, and color, and performs various calculations to extract the target's features. Finally, based on a preset crack appearance state, the image processing system outputs a result, indicating whether the crack is qualified or unqualified, thus achieving automatic identification.

[0027] The image detection device comprises a camera for capturing images and converting them into image signals. It also includes an image acquisition card for receiving image signals from the camera, converting them into digital format, and then transmitting them to an image processing system for further processing. The image processing system consists of both hardware and software components; the hardware processes the image data, while the software handles algorithm implementation and result output. The image processing system performs various calculations and analyses on the received digital images to extract target features and output results. Finally, a display monitor shows the images captured by the image acquisition device and the results output by the image processing system, facilitating real-time monitoring and judgment by the operator.

[0028] During the inspection process, the motor 10 drives the incomplete gear 11 to rotate, which in turn intermittently drives the driven wheel 9 to rotate. The driven wheel 9, connecting shaft 8, and lead screw 7 rotate synchronously, which in turn drives the movable seat 4 to move intermittently along the slide rail 3. This causes the image detection device 6 to move intermittently to different positions on the bridge steel structure 21. When the image detection device 6 moves to a certain position, it remains stationary for a period of time and takes an image. This replaces manual movement of the image detection device 6, saving time and effort for staff, effectively improving inspection efficiency and reducing inspection costs.

[0029] The motor 10 is equipped with a dust cover, which can protect the motor 10 from dust.

[0030] The height adjustment mechanism includes a guide groove 12 formed at the bottom of the top seat 2. The guide groove 12 is a cross-shaped groove with a cross-shaped cross section. Two spaced movable blocks 13 are slidably arranged within the guide groove 12. It also includes a first connecting rod 14 and a second connecting rod 15 located between the top seat 2 and the base 1. The first connecting rod 14 and the second connecting rod 15 are intersected and hinged together at the intersection. The upper ends of the first connecting rod 14 and the second connecting rod 15 are respectively hinged to the two movable blocks 13, and the lower end of the first connecting rod 14 is hinged to the base 1. The height adjustment mechanism also includes a groove 16 formed on the base 1. A base block 17 is provided within the groove 16, and the lower end of the second connecting rod 15 is hinged to the base block 17. Two spaced guide rods 18 are fixedly installed within the groove 16, passing through the base block 17. A screw 19 is rotatably installed within the groove 16, passing through the base block 17 and threadedly connected to it. A turntable 20 is rotatably mounted on one end of the base 1, and the rotating shaft of the turntable 20 is fixedly connected to the screw 19.

[0031] When inspecting bridges of different heights, the height of the image detection device 6 needs to be adjusted according to the bridge height to bring it closer to the bridge and capture clearer images. Therefore, rotating the turntable 20 drives the screw 19 to rotate, which in turn moves the base block 17 along the guide rod 18, thereby moving the lower end of the second connecting rod 15. This works synchronously with the first connecting rod 14. When the lower end of the second connecting rod 15 moves towards the lower end of the first connecting rod 14, the upper ends of the second connecting rod 15 and the first connecting rod 14 approach each other, and the two movable blocks 13 approach each other, thus moving the top seat 2 upwards and causing the image detection device 6 to move upwards. Conversely, when the lower end of the second connecting rod 15 moves away from the lower end of the first connecting rod 14, it causes the image detection device 6 to move downwards. Therefore, the height of the image detection device 6 can be adjusted accordingly based on the bridge height.

[0032] The working principle of this utility model is as follows:

[0033] The device is placed under the bridge, with the camera lens of the image detection device 6 facing the bridge steel structure 21. Crack detection is performed on the bridge steel structure 21 using the image detection device 6. During the detection process, the motor 10 drives the incomplete gear 11 to rotate, which intermittently drives the driven wheel 9 to rotate. The driven wheel 9, connecting shaft 8, and lead screw 7 rotate synchronously, causing the movable seat 4 to move intermittently along the slide rail 3. This, in turn, causes the image detection device 6 to intermittently move to different positions on the bridge steel structure 21. When the image detection device 6 moves to a certain location, it remains stationary for a period of time and performs image capture.

[0034] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A crack detection device for bridge steel structures, characterized in that, Include: Base (1), the base (1) upper end is provided with top seat (2), the height adjusting mechanism is installed between top seat (2) and base (1), the height adjusting mechanism is used for adjusting the height of top seat (2); The top seat (2) is fixedly installed with a slide (3), both sides of the slide (3) are provided with a sliding groove, the slide (3) is provided with a movable seat (4), both sides of the movable seat (4) are fixedly provided with a sliding block (5), the sliding block (5) is slidably arranged in the slide (3), the movable seat (4) is fixedly installed with an image detection device (6) on the top, the shooting lens of the image detection device (6) is arranged upwards, the slide (3) is rotatably installed with a lead screw (7), the lead screw (7) penetrates the movable seat (4) and is threadedly connected with the movable seat (4), the slide (3) is rotatably installed with a connecting shaft (8) outside, the connecting shaft (8) is fixedly connected with the lead screw (7), the connecting shaft (8) is fixedly provided with a driven wheel (9) at one end, the top seat (2) is fixedly provided with a motor (10), the output shaft of the motor (10) is fixedly installed with an incomplete gear (11), the incomplete gear (11) is engaged with the driven wheel (9).

2. The crack detection device for a bridge steel structure according to claim 1, characterized by A dust cover is installed outside the motor (10).

3. The crack detection device for a bridge steel structure according to claim 1, characterized by The height adjusting mechanism comprises a guide groove (12) opened in the bottom of the top seat (2), the guide groove (12) is a cross groove and the cross section is cross-shaped, two spaced movable blocks (13) are slidably arranged in the guide groove (12), a first connecting rod (14) and a second connecting rod (15) are arranged between the top seat (2) and the base (1), the first connecting rod (14) and the second connecting rod (15) are cross arranged and hinged together at the intersection, the upper ends of the first connecting rod (14) and the second connecting rod (15) are hinged to the two movable blocks (13) respectively, and the lower end of the first connecting rod (14) is hinged to the base (1).

4. The crack detection device for a bridge steel structure according to claim 3, characterized by The height adjusting mechanism further comprises a recess (16) opened in the base (1), a bottom block (17) is arranged in the recess (16), and the lower end of the second connecting rod (15) is hinged to the bottom block (17).

5. The crack detection device for a bridge steel structure according to claim 4, characterized by Two spaced guide rods (18) are fixedly installed in the recess (16), the guide rods (18) penetrate the bottom block (17), and a screw rod (19) is rotatably installed in the recess (16), the screw rod (19) penetrates the bottom block (17) and is threadedly connected with the bottom block (17).

6. The crack detection device for a bridge steel structure according to claim 5, characterized by One end of the base (1) is rotatably installed with a rotating disc (20), and the rotating shaft of the rotating disc (20) is fixedly connected with the screw rod (19).

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