Cable-stayed cable surface vibration monitoring device based on magnetic attraction type buckle
By designing a magnetic snap-on device, and utilizing components such as magnets and springs, the problem of magnetic snap-on devices losing their magnetism after exposure to sunlight is solved, thus achieving stability and reliability in monitoring the vibration of cable stays.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU PROVINCE TRANSPORTATION PLANNING SURVEY & DESIGN INST
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-02
AI Technical Summary
In existing technologies, the magnetism of magnetic clips decreases after prolonged exposure to sunlight, causing the cable-stayed bridge monitoring sensor to become unstable and affecting the monitoring effect.
A magnetic snap-fit device is used, including components such as a support base, magnet, and spring. The sensor is fixed in place by magnetic attraction and snap-fit structure to prevent it from falling off due to decreased magnetism.
This improved the stability of the sensor on the cable-stayed bridge, ensuring the reliability and accuracy of long-term monitoring.
Smart Images
Figure CN224317150U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cable monitoring technology, specifically to a surface vibration monitoring device for inclined cables based on magnetic snap-fit. Background Technology
[0002] A stay cable is a tension member on a cable-stayed bridge that connects the main girder and the towers. It transfers the load of the main girder to the towers, enabling the main girder to span larger distances and thus achieving a large-span bridge structure. By adjusting the tension of the stay cables, the structural performance of the bridge can be fine-tuned, such as adjusting the deflection of the main girder and improving the stress state of the bridge. Tensioning the stay cables is a critical step in the construction process, requiring strict control of the tension force and sequence. A staged tensioning method is typically used, first tensioning the stay cables to a certain percentage of the design tension, and then gradually increasing the tension force until the design requirements are met. During tensioning, it is also necessary to monitor the deflection of the main girder and the displacement of the towers in real time to ensure construction safety and quality. Vibration monitoring is also required during the use of the stay cables.
[0003] Extensive research revealed problems with existing technologies for monitoring cable-stayed bridge vibration. While workers typically use magnetic clips to attach vibration sensors to the cables, the magnetism of these clips gradually weakens after prolonged exposure to sunlight, making it difficult to secure the sensors. Consequently, sensors may fall off the cables, affecting monitoring accuracy. Therefore, based on the aforementioned research and existing technologies, a cable-stayed bridge surface vibration monitoring device based on magnetic clips is proposed to address these issues. Utility Model Content
[0004] The purpose of this invention is to provide a surface vibration monitoring device for cable stays based on magnetic snap-fit, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A cable-stayed bridge surface vibration monitoring device based on magnetic snap fasteners includes: a support base one, a support base two provided on the top surface of the support base one, a support groove formed on the top surface of the support base two, a MEMS accelerometer for detecting cable-stayed bridge vibration fixedly installed on the inner bottom surface of the support groove, an information processing module for processing and collecting information fixedly installed on the inner bottom surface of the support groove, and an environmental compensation module fixedly installed on the inner bottom surface of the support groove.
[0007] A magnetic fixing mechanism is provided on both sides of the first support base, and is used to fix the first support base and the second support base to the cable.
[0008] Furthermore, the magnetic fixing mechanism includes two connecting boxes 1, which are respectively fixedly installed on both sides of the support base 1. A magnet 1 is fixedly sleeved inside the connecting box 1. Connecting boxes 2 are fixedly installed on both sides of the support base 2, and magnet 2 is fixedly sleeved inside the connecting box 2. A support column is fixedly installed inside the magnet 2. Two support plates are elastically connected to the outer circular wall of the support column by a spring. A snap-fit block is fixedly installed on one side of the support plate. The snap-fit block is movably snapped with the magnet 1. A movable rod is fixedly installed on one side of the support plate. One end of the movable rod passes through the connecting box 2 and the magnet 2 and extends to the outside of the connecting box 2.
[0009] Furthermore, a slide rail is fixedly installed on the inner bottom surface of the second connecting box, and a sliding hole is provided on one side of the support plate, the sliding hole being slidably connected to the slide rail.
[0010] Furthermore, a sealing gasket is provided on the top surface of the support base, a cover plate is provided on the top surface of the sealing gasket, and a plurality of threaded posts are connected through the top surface of the cover plate. The lower ends of the threaded posts pass through the cover plate and the sealing gasket and are threadedly connected to the top surface of the support base.
[0011] Furthermore, two positioning blocks are fixedly installed on both sides of the support base one, and a positioning column is fixedly installed on the bottom surface of the positioning block one. Positioning blocks are fixedly installed on both sides of the support base two, and the positioning column is slidably connected to the positioning block two.
[0012] Furthermore, silicone pads are fixedly installed on the bottom surface of the first support and the top surface of the second support, and rubber plates are fixedly sleeved on the inner circular wall surface of the first support and the inner circular wall surface of the second support.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. By using the support base 2, movable rod, support plate, support column, spring, snap-fit block, magnet 1, magnet 2 and support base in cooperation, support base 1 and support base 2 can be magnetically fixed to the cable stay and the support plate can drive the snap-fit block to move inward. By using the support plate, connecting box 1, magnet 1, magnet 2, snap-fit hole and spring in cooperation, magnet 1 and magnet 2 can be snapped together, preventing support base 1 and support base 2 from falling off the cable stay due to the decrease in magnetism of magnet 1 and magnet 2 after long-term exposure to sunlight. This improves the stability of support base 1 and support base 2 on the cable stay and achieves the magnetic fixation effect of support base 1 and support base 2, which is helpful for subsequent monitoring of vibration on the cable stay. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0016] Figure 2 This is a schematic diagram of the connection structure between the sealing gasket and the cover plate of this utility model;
[0017] Figure 3 This is a schematic diagram of the connection structure between the support plate and the support column of this utility model;
[0018] Figure 4 This is a schematic diagram of the connection structure between the positioning column and the second positioning block of this utility model.
[0019] In the diagram: 1. Support base one; 2. Support base two; 3. Rubber plate; 4. Silicone pad; 5. Magnetic fixing mechanism; 6. Sealing gasket; 7. Cover plate; 8. Threaded post; 9. Support groove; 10. MEMS accelerometer; 11. Information processing module; 12. Environmental compensation module; 13. Connecting box one; 14. Connecting box two; 15. Magnet one; 16. Magnet two; 17. Support plate; 18. Snap-fit block; 19. Support post; 20. Spring; 21. Slide rail; 22. Sliding hole; 23. Snap-fit hole; 24. Movable rod; 25. Positioning block one; 26. Positioning post; 27. Positioning block two. Detailed Implementation
[0020] 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.
[0021] In one typical implementation of this application, please refer to Figures 1-4 A cable-stayed bridge surface vibration monitoring device based on magnetic snap-fit includes a support base 1, a support base 2 on the top surface of the support base 1, a support groove 9 on the top surface of the support base 2, a MEMS accelerometer 10 for detecting cable-stayed bridge vibration fixedly installed inside the support groove 9, and an information processing module 11 for processing and acquiring information fixedly installed inside the support groove 9. The information processing module 11 consists of a low-noise amplifier, a 24-bit ADC chip, and an anti-aliasing filter. The noise amplifier is used to enhance the weak signal output by the MEMS accelerometer 10 and suppress PCB-level interference; the 24-bit ADC chip ensures a dynamic range ≥110dB to prevent small amplitude vibrations from being submerged by quantization noise; the anti-aliasing filter has a cutoff frequency set to 80% of the Nyquist frequency to eliminate high-frequency noise folding and reduce the interference and influence of the external environment on the MEMS accelerometer 10.
[0022] An environmental compensation module 12 is fixedly installed on the inner bottom surface of the support groove 9. The environmental compensation module 12 consists of a temperature sensor, a humidity sensor, and an inclinometer. The temperature sensor and humidity sensor work together to compensate for the temperature and humidity of the MEMS accelerometer 10, while the inclinometer corrects the gravity component error caused by the installation angle deviation, further improving the accuracy of the MEMS accelerometer 10 in monitoring the structure. The magnetic fixing mechanism 5 is set on both sides of the support base 1 and is used to fix the support base 1 and the support base 2 to the cable.
[0023] The magnetic fixing mechanism 5 includes two connecting boxes 13, which are fixedly installed on both sides of the support base 1. A magnet 15 is fixedly sleeved inside the connecting box 13. Connecting boxes 14 are fixedly installed on both sides of the support base 2. A magnet 16 is fixedly sleeved inside the connecting box 14. A support column 19 is fixedly installed inside the magnet 16. Two support plates 17 are elastically connected to the outer circular wall of the support column 19 by a spring 20. The spring 20 is sleeved on the outer circular wall of the support column 19. The two ends of the spring 20 are fixedly connected to one side of the two support plates 17. A snap-fit block 18 is fixedly installed on one side of the support plate 17. The snap-fit block 18 is movably snapped into the magnet 15. Snap-fit holes 23 are opened on both sides of the magnet 15. The snap-fit block 18 is movably snapped into the snap-fit holes 23. Both magnet 15 and magnet 16 are neodymium iron boron permanent magnets with nickel plating for corrosion resistance. The magnetic attraction force of a single module is ≥200N, ensuring that it will not fall off in strong wind conditions.
[0024] Magnet 15 and Magnet 26 attract each other magnetically. A movable rod 24 is fixedly installed on one side of the support plate 17. One end of the movable rod 24 passes through the connecting box 24 and the magnet 26 and extends to the outside of the connecting box 24.
[0025] In the above features, after the support base 1 and support base 2 are fixed to the cable by the magnetic attraction of magnet 15 and magnet 26, the two sets of support plates 17 and snap-fit blocks 18 are snapped with magnet 15 under the action of spring 20, thereby further fixing magnet 15 and magnet 26 and preventing magnet 15 and magnet 26 from separating.
[0026] Preferably, using the second support seat 2, the worker places the second support seat 2 on the outer wall of the cable-stayed bridge. The worker squeezes the two movable rods 24, causing the two movable rods 24 to move inward, which in turn moves the support plate 17 inward along the support column 19, simultaneously compressing the spring 20. The inward movement of the support plate 17 also causes the locking block 18 to move inward. The worker places the first support seat 1 on the second support seat 2. At this time, the first magnet 15 and the second magnet 16 attract each other, and the mutual magnetic attraction of the first magnet 15 and the second magnet 16 fixes the first support seat 1 and the second support seat 2 on the cable-stayed bridge. At the same time, the two support plates 17 enter the interior of the first magnet 15 in the first connecting box 13. The worker releases the two movable rods 24, and the spring 20... Force is applied to the support plate 17, causing the snap-fit block 18 to move outward along the support column 19. This allows the snap-fit block 18 to enter the snap-fit hole 23 on the magnet 15, thereby snapping the magnet 15 and the magnet 2 16 together. This prevents the magnets 15 and 2 16 from separating due to decreased magnetism after prolonged exposure to sunlight, which would cause the support base 1 and support base 2 2 to fall off the cable. Not only are the support base 1 and support base 2 2 magnetically attached to the cable, but the support plate 17 and snap-fit block 18 also snap the magnets 15 and 2 16 together, improving the stability of the support base 1 and support base 2 2 on the cable. This achieves a magnetic fixation effect on the support base 1 and support base 2 2, which is helpful for subsequent monitoring of vibrations on the cable.
[0027] A slide rail 21 is fixedly installed on the inner bottom surface of the connecting box 2 14. A sliding hole 22 is provided on one side of the support plate 17. Both the slide rail 21 and the sliding hole 22 are T-shaped structures. The sliding hole 22 is slidably connected to the slide rail 21. The slide rail 21 and the sliding hole 22 cooperate to restrict the sliding of the two support plates 17.
[0028] Preferably, the two support plates 17 are positioned so that they move along the slide rail 21. The slide rail 21 can restrict the movement of the two support plates 17 and improve the stability of their movement.
[0029] The top surface of the support base 1 is provided with a sealing gasket 6, the top surface of the sealing gasket 6 is provided with a cover plate 7, and a number of threaded posts 8 are connected through the top surface of the cover plate 7. The lower end of the threaded posts 8 passes through the cover plate 7 and the sealing gasket 6 and is threadedly connected to the top surface of the support base 1.
[0030] Preferably, by using the sealing gasket 6, the operator places the sealing gasket 6 and the cover plate 7 on the top surface of the support base 1, and places the threaded post 8 on the cover plate 7 and rotates the threaded post 8 to fix the sealing gasket 6 and the cover plate 7 on the top surface of the support base 1. The sealing gasket 6 can reduce the gap between the cover plate 7 and the support base 1, while the cover plate 7 can protect the MEMS accelerometer 10 and prevent damage to the MEMS accelerometer 10.
[0031] Two positioning blocks 25 are fixedly installed on both sides of the support base 1. A positioning column 26 is fixedly installed on the bottom surface of the positioning block 25. Two positioning blocks 27 are fixedly installed on both sides of the support base 2. The positioning column 26 and the positioning block 27 are slidably connected. The support base 1 and the support base 2 can be positioned by the cooperation of the positioning block 25, the positioning column 26 and the positioning block 27.
[0032] Preferably, by setting support seat 1, the staff places support seat 1 on the top surface of support seat 2, so that the positioning post 26 on the bottom surface of positioning block 25 enters the interior of positioning block 27 on support seat 2, thereby positioning support seat 1 and support seat 2, achieving the positioning effect of support seat 1 and support seat 2.
[0033] Silicone pads 4 are fixedly installed on the bottom surface of support base 1 and the top surface of support base 2. Rubber plates 3 are fixedly sleeved on the inner circular wall surface of support base 1 and the inner circular wall surface of support base 2.
[0034] Preferably, the silicone pad 4 can reduce the impact of cable vibration on support seat 1 and support seat 2, and the rubber plate 3 can increase the friction between support seat 1 and support seat 2 and the cable, preventing support seat 1 and support seat 2 from shifting on the cable.
[0035] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A cable-stayed bridge surface vibration monitoring device based on magnetic snap-fit, characterized in that, include: Support base one (1), and support base two (2) is provided on the top surface of support base one (1). Support groove (9) is opened on the top surface of support base two (2). MEMS accelerometer (10) for detecting the vibration of the cable is fixedly installed on the bottom surface of the support groove (9). Information processing module (11) for processing and collecting information is fixedly installed on the bottom surface of the support groove (9). Environmental compensation module (12) is fixedly installed on the bottom surface of the support groove (9). A magnetic fixing mechanism (5) is provided on both sides of the first support (1) to fix the first support (1) and the second support (2) to the cable.
2. The cable-stayed bridge surface vibration monitoring device based on magnetic snap-fit according to claim 1, characterized in that: The magnetic fixing mechanism (5) includes two connecting boxes (13), which are fixedly installed on both sides of the support base (1). A magnet (15) is fixedly sleeved inside the connecting box (13). A connecting box (2) is fixedly installed on both sides of the support base (2). A magnet (16) is fixedly sleeved inside the connecting box (2). A support column (19) is fixedly installed inside the magnet (16). Two support plates (17) are elastically connected to the outer circular wall of the support column (19) by a spring (20). A snap-fit block (18) is fixedly installed on one side of the support plate (17). The snap-fit block (18) is movably snapped with the magnet (15). A movable rod (24) is fixedly installed on one side of the support plate (17). One end of the movable rod (24) passes through the connecting box (24) and the magnet (16) and extends to the outside of the connecting box (24).
3. The cable-stayed bridge surface vibration monitoring device based on magnetic snap-fit according to claim 2, characterized in that: The inner bottom surface of the connecting box 2 (14) is fixedly installed with a slide rail (21), and a sliding hole (22) is opened on one side of the support plate (17), and the sliding hole (22) is slidably connected to the slide rail (21).
4. The cable-stayed bridge surface vibration monitoring device based on magnetic snap-fit according to claim 1, characterized in that: The top surface of the support base (1) is provided with a sealing gasket (6), and the top surface of the sealing gasket (6) is provided with a cover plate (7). The top surface of the cover plate (7) is connected with a plurality of threaded posts (8). The lower end of the threaded posts (8) passes through the cover plate (7) and the sealing gasket (6) and is threadedly connected to the top surface of the support base (1).
5. The cable-stayed bridge surface vibration monitoring device based on magnetic snap-fit according to claim 1, characterized in that: Two positioning blocks (25) are fixedly installed on both sides of the support base (1). A positioning column (26) is fixedly installed on the bottom surface of the positioning block (25). Two positioning blocks (27) are fixedly installed on both sides of the support base (2). The positioning column (26) is slidably connected to the positioning block (27).
6. The cable-stayed bridge surface vibration monitoring device based on magnetic snap-fit according to claim 1, characterized in that: Silicone pads (4) are fixedly installed on the bottom surface of the support base one (1) and the top surface of the support base two (2). Rubber plates (3) are fixedly sleeved on the inner circular wall surface of the support base one (1) and the inner circular wall surface of the support base two (2).