Bridge suspender vibration amplifying device suitable for video measurement

Abstract

The utility model relates to a bridge suspender vibration amplification device suitable for video measurement, including sling connecting assembly and vibration amplification subassembly, sling connecting assembly includes sling lock catch and U piece, and U piece is connected with sling lock catch and inserts, and sling lock catch includes first lock catch and second lock catch, and vibration amplification subassembly includes long hole iron sheet, round target point and adjusting bolt, through the cooperation of sling connecting assembly and vibration amplification subassembly, effectively solve the small vibration capture problem: the first lock catch of half ring design, the second lock catch cooperate U piece and form the encircling type connection, and rubber pad layer and antiskid line enhance the stability of fitting, ensure that the sling vibration has no loss transmission, round target point adopts the reflective material and promotes the high speed camera identification accuracy, and adjusting bolt moves along the long hole and adapts to different amplitude monitoring demand, the whole structure realizes the visualization amplification of sling low frequency small vibration, provides clear and reliable vibration data for bridge health assessment, overcomes the defect that traditional detection equipment captures fuzzy.

Description

Technical Field

[0001] This utility model relates to the field of bridge inspection technology, and in particular to a bridge gantry vibration amplification device suitable for video measurement. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] In bridge structures, suspenders are critical load-bearing components, and their operational stability directly affects the overall safety of the bridge. Currently, monitoring suspender vibration is a common and effective method for assessing their health. However, in actual testing, it has been found that suspenders may experience very minor vibrations under normal operating conditions. These minor vibrations have extremely small amplitudes, making it difficult for conventional testing equipment such as high-speed cameras to accurately and clearly capture their vibration characteristics and patterns. Existing testing techniques have significant limitations when dealing with these minor vibrations, resulting in the inability to obtain accurate and comprehensive suspender vibration data. This, in turn, affects the accurate judgment of the actual working condition of the suspenders and the scientific assessment of bridge safety. For example, in some long-span bridges, although advanced high-speed cameras are used for suspender vibration monitoring, the images captured for some low-frequency, small-amplitude vibrations are blurry and cannot provide reliable data for subsequent analysis. Utility Model Content

[0004] The purpose of this invention is to provide a bridge gantry vibration amplification device suitable for video measurement, which can at least solve one of the above-mentioned technical problems.

[0005] To achieve the above objectives, one or more embodiments of this utility model provide a bridge suspender vibration amplification device suitable for video measurement, including a suspender cable connection assembly and a vibration amplification assembly; the suspender cable connection assembly includes a suspender cable buckle and a U-shaped component, the U-shaped component being plugged into the suspender cable buckle, the suspender cable buckle including a first buckle and a second buckle, the first buckle and the second buckle being mated and connected to the suspender cable; the vibration amplification assembly includes an elongated iron plate, a circular target point, and an adjusting bolt, the elongated iron plate comprising a vertical plate with an elongated hole and a horizontal plate fixedly connected to the second buckle, the vertical plate being perpendicular to the horizontal plate, the top of the elongated iron plate having a circular target point, and the adjusting bolt passing through the elongated hole of the elongated iron plate and being movable along the length of the hole.

[0006] Furthermore, both the first and second latches are semi-circular structures, and both the first and second latches are provided with connecting holes for connection with the U-shaped component.

[0007] Furthermore, the spacing of the connecting holes is consistent with the bending radius of the U-shaped component.

[0008] Furthermore, the axis of the circular target point is parallel to the top horizontal edge of the elongated iron plate.

[0009] Furthermore, the thickness of the vertical plate does not exceed one-half the thickness of the horizontal plate.

[0010] Furthermore, the circular target point is made of a reflective material.

[0011] Furthermore, the screw portion of the adjusting bolt is fitted with the elongated hole, and the major diameter of the screw corresponds to the width of the elongated hole.

[0012] Furthermore, the first and second latches are joined and wrapped around the sling, and the U-shaped piece is inserted into the connecting hole of the first and second latches to lock the first and second latches.

[0013] Furthermore, the sling lock has a double-layer structure. The inner layer of the sling lock is provided with a rubber pad, and the contact surface between the rubber pad and the sling is provided with anti-slip texture. The outer layer of the sling lock is a corrosion-resistant metal part.

[0014] Furthermore, the rubber pad layer is bonded to the metal component.

[0015] The beneficial effects of the embodiments of this utility model are as follows: This utility model effectively solves the problem of capturing minute vibrations by using a sling connection component and a vibration amplification component in synergy: the semi-circular first and second locking buckles, together with the U-shaped parts, form a ring-shaped connection, and the rubber pad and anti-slip texture enhance the fit and stability, ensuring lossless transmission of sling vibrations; the vertical structure of the upright and horizontal plates of the long-hole iron plate amplifies minute vibrations into significant displacement of the top circular target point.

[0016] The circular target point is made of reflective material, which can improve the recognition accuracy of high-speed cameras. The adjustment bolt moves along the long hole to adapt to different amplitude monitoring needs. The overall structure realizes the visualization and magnification of the low-frequency small vibration of the suspension cable, providing clear and reliable vibration data for bridge health assessment and overcoming the shortcomings of traditional detection equipment in capturing blurry data. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0018] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model; Figure 2 This is an embodiment of the present utility model. Figure 1 Top view.

[0019] In the diagram: 1. First latch; 2. Rubber pad; 3. U-shaped part; 4. Adjusting bolt; 5. Circular target point; 6. Vertical plate; 7. Horizontal plate; 8. Second latch; 9. Connecting hole; 10. Sling. Detailed Implementation

[0020] like Figures 1 to 2 As shown in the embodiment of this utility model, a vibration amplification and capture device for a bridge suspension cable 10 is described, including a suspension cable connection assembly and a vibration amplification assembly.

[0021] like Figure 1 As shown, the sling connection assembly includes a sling buckle and a U-shaped part 3. The U-shaped part 3 is plugged into the sling buckle. The sling buckle includes a first buckle 1 and a second buckle 8. The first buckle 1 and the second buckle 8 are connected to the sling 10. The vibration amplification assembly includes a long-hole iron plate, a circular target point 5 and an adjusting bolt 4. The long-hole iron plate consists of a vertical plate 6 with a long hole and a horizontal plate 7 fixedly connected to the second buckle 8. The vertical plate 6 is set perpendicular to the horizontal plate 7. The top of the long-hole iron plate is provided with a circular target point 5. The adjusting bolt 4 passes through the long hole of the long-hole iron plate and can move along the length of the hole.

[0022] Specifically, the upright plate 6 is designed using thin steel or carbon fiber plates to enhance the sensitivity of vibration transmission. The elongated holes are formed by laser cutting or stamping to ensure the smooth movement of the adjusting bolt 4 within them. The circular target point 5 serves as a visual marker, made of high-contrast material to improve the detection equipment's ability to recognize its movement trajectory. Through this mechanical structure design, the minute vibrations of the sling 10 are amplified and captured. Compared to existing technologies that directly rely on high-speed cameras to monitor the vibration of the sling 10, this embodiment uses a vibration amplification component to transform minute vibrations that are difficult to observe directly into significant displacement changes, thereby solving the problem of the detection equipment's inability to accurately capture the vibration characteristics of the sling 10.

[0023] Both the first latch 1 and the second latch 8 are semi-circular structures, and each has a connecting hole 9 for connecting to the U-shaped component 3. The semi-circular design of the first latch 1 and the second latch 8 directly adapts to the cylindrical surface of the sling 10, maximizing the contact area when encircling the sling 10 and significantly improving the tightness of the fit between the latch and the sling 10. Since the surface of the sling 10 is curved, the semi-circular structure, compared to other non-fitting shapes, more effectively avoids localized stress concentration or slippage, thus maintaining positional stability during vibration and preventing device displacement that could affect vibration capture accuracy. Simultaneously, the connecting hole 9 allows the U-shaped component 3 to be accurately inserted and locked in place, with the spacing matching the bending radius of the U-shaped component 3, ensuring no offset or shaking during insertion.

[0024] The spacing of the connecting holes 9 is consistent with the bending radius of the U-shaped part 3. By designing the spacing of the connecting holes 9 to be consistent with the bending radius of the U-shaped part 3, the U-shaped part 3 can be precisely embedded into the connecting holes 9 of the first latch 1 and the second latch 8. This ensures that the U-shaped part 3 maintains its connection with the first latch 1 and the second latch 8 when subjected to the vibration of the sling 10, suppressing any relative displacement or swaying that may occur at the connection point. When the sling 10 generates slight vibrations, the vibration energy can be transmitted losslessly to the vibration amplification component through the tightly fitted connection structure, so that the motion trajectory of the circular target point 5 truly reflects the original vibration state.

[0025] The axis of the circular target point 5 is parallel to the top horizontal edge of the elongated iron plate 6. By setting the axis of the circular target point 5 parallel to the top horizontal edge of the elongated iron plate 6, the spatial orientation of the target point in its installed state is highly matched with the monitoring requirements of the camera. Since the elongated iron plate 6 is set perpendicular to the horizontal plate 7, the top horizontal edge of the plate 6 naturally forms a horizontal reference plane. The parallelism of the target point axis with this horizontal edge means that the target point surface is strictly horizontal. This design ensures that the displacement trajectory of the target point remains consistent with the camera's shooting plane during the vibration of the suspension cable 10, avoiding viewing angle deviation and image distortion caused by the tilt of the target point. When the suspension cable 10 generates slight vibrations, the direction of movement of the target point is directly reflected in the camera image. The vibration amplitude and frequency can be clearly recorded without additional correction, thereby significantly improving the high-speed camera's accuracy and reliability in capturing weak vibration signals.

[0026] The thickness of the vertical plate 6 does not exceed half the thickness of the horizontal plate 7. Specifically, by controlling the thickness ratio of the vertical plate 6 to the horizontal plate 7, the mass inertia of the vertical plate 6 is effectively reduced, while avoiding the risk of structural failure due to excessive thinness. The thinner vertical plate 6 can convert the small amplitude of the suspension cable 10 into a larger target displacement, making the motion trajectory of the circular target 5 more clearly visible, facilitating the high-speed camera equipment to capture high-precision vibration images. In addition, this thickness ratio design also takes into account the vibration amplification effect and the long-term durability of the component, ensuring the amplification function while preventing fatigue fracture problems caused by the excessive thinness of the vertical plate 6. By rationally designing the thickness ratio of the vertical plate 6 to the horizontal plate 7, the above device not only improves the sensitivity and response to small vibrations, but also ensures the structural stability and service life of the entire vibration amplification component.

[0027] The circular target point 5 is made of reflective material, effectively solving the problem of insufficient image clarity when the camera captures minute vibrations. The application of reflective material significantly enhances the light reflection capability of the target point surface, allowing the target point to reflect stronger light signals and form a more vivid image contrast during high-speed camera monitoring. This not only avoids image blurring caused by insufficient ambient light or small vibration amplitude, but also ensures that subtle changes in vibration characteristics can be stably captured and recorded by the camera, thus providing a clear and reliable foundation for subsequent vibration data analysis. In addition, the use of reflective material specifically addresses the limitations of ordinary materials in terms of optical properties. By improving the visibility of the target point, it directly optimizes the applicability of the vibration amplification and capture device in actual monitoring, especially in complex conditions such as long-span bridges, ensuring the accuracy of the health status assessment of the suspension cable 10.

[0028] The screw portion of adjusting bolt 4 is fitted with the elongated hole via a transition fit. The major diameter of the screw corresponds to the width of the elongated hole. By optimizing the fit mechanism between adjusting bolt 4 and the elongated hole, the adjustment accuracy and signal transmission reliability during vibration amplification and capture are effectively improved. The transition fit between the screw portion of adjusting bolt 4 and the elongated hole avoids both excessive looseness causing wobbling and excessive tightness causing jamming, ensuring a smooth adjustment process. Simultaneously, the major diameter of the screw corresponds to the width of the elongated hole. This dimensional matching design eliminates the influence of manufacturing tolerances on adjustment stability, ensuring reliable position locking during repeated adjustments. Furthermore, this precise fit, together with components such as the sling lock and the elongated hole iron plate, forms a complete vibration transmission path, thus providing a stable mechanical foundation for capturing the minute vibrations of the sling 10.

[0029] like Figure 1 and Figure 2As shown, the first latch 1 and the second latch 8 are joined and encircle the sling 10. The U-shaped piece 3 is inserted into the connecting hole 9 of the first latch 1 and the second latch 8 to lock the first latch 1 and the second latch 8. The first latch 1 and the second latch 8 are joined and encircle the sling 10 to form an initial fixed structure. However, since the surface of the sling 10 may be smooth or subject to slight vibration disturbances, simply relying on the joint cannot maintain a tight contact. Gaps are likely to form during long-term use, causing relative sliding between the device and the sling 10. Based on this, the U-shaped piece 3 is inserted into the connecting hole 9 of the first latch 1 and the second latch 8, and mechanical locking is achieved by precisely matching its geometry with the connecting hole 9. This design, based on the preset position and size of the connecting hole 9, allows the U-shaped piece 3 to be quickly aligned and inserted into the hole, forming a simple and efficient rigid constraint, avoiding the cumbersome operation and loosening risk of traditional bolt tightening. Ultimately, the first latch 1 and the second latch 8 are firmly integrated into a single unit, eliminating relative movement between the latches and ensuring that the sling connection assembly and the sling 10 vibrate in complete synchronization. This guarantees that the elongated iron plate and the circular target point 5 stably transmit vibration signals, providing a clear and interference-free capture reference for the high-speed camera and effectively supporting the accurate monitoring of minute vibrations.

[0030] The sling lock has a double-layer structure. The inner layer of the sling lock has a rubber pad 2, and the contact surface between the rubber pad 2 and the sling 10 has anti-slip texture. The outer layer of the sling lock is a corrosion-resistant metal part, and the rubber pad 2 is bonded to the metal part.

[0031] Specifically, the rubber pad layer 2 is fixed to the metal component by adhesive bonding, thus solving the problem of loose connection in the double-layer structure. Simultaneously, the adhesive bonding optimizes the stress distribution of the structure, preventing localized stress concentration. The double-layer design solves a key problem in the connection between the buckle and the sling 10. The inner rubber pad layer 2 can tightly conform to the surface of the sling 10, and its elastic properties can adapt to the slight irregularities on the surface of the sling 10, providing uniform and moderate contact pressure, effectively suppressing relative slippage caused by a smooth surface. The anti-slip texture on the surface of the rubber pad layer 2, based on the principle of increasing surface micro-roughness, significantly improves friction, ensuring stable contact between the buckle and the sling 10 during vibration, thereby faithfully transmitting minute vibration characteristics. The corrosion-resistant metal component used in the outer layer forms a reliable protective barrier against corrosive factors such as humidity and acid rain present in the outdoor environment of bridges, preventing the metal components from loosening or failing due to corrosion. This structural design complements the overall function of the sling buckle, ensuring stable transmission of vibration signals while maintaining the long-term reliability of the device, thus guaranteeing the overall accuracy of vibration capture.

[0032] The working principle of this utility model is as follows: The synergistic effect of the cable connection assembly and the vibration amplification assembly effectively amplifies the minute vibrations of the bridge cable, facilitating clear capture of vibration characteristics by the detection equipment. The cable connection assembly includes a first and a second locking buckle, which are mated to the cable and locked together via a U-shaped fitting, ensuring the device is firmly attached to the cable surface and accurately transmits the cable's original vibration signal. The elongated metal plate in the vibration amplification assembly consists of a vertical plate and a horizontal plate. The horizontal plate is fixedly connected to the second locking buckle, and the vertical plate is perpendicular to the horizontal plate. When the cable vibrates, the vibration signal is transmitted to the vertical plate through the horizontal plate. Due to the slender structure of the vertical plate and the guiding effect of the elongated hole, the minute vibration is converted into a larger displacement at the top of the vertical plate. The circular target point at the top of the vertical plate serves as a high-contrast visual marker, significantly improving the detection equipment's ability to identify vibration displacement. An adjusting bolt passes through the elongated hole and can move along its length to fine-tune the initial position of the vertical plate and the vibration amplification factor, thus adapting the vibration amplification effect to different working conditions.

[0033] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A bridge suspender vibration amplification device suitable for video measurement, characterized in that, The device includes a sling connection assembly and a vibration amplification assembly. The sling connection assembly includes a sling lock and a U-shaped component. The U-shaped component is plugged into the sling lock. The sling lock includes a first lock and a second lock, which are connected to the sling. The vibration amplification assembly includes a long-hole iron plate, a circular target point, and an adjusting bolt. The long-hole iron plate consists of a vertical plate with a long hole and a horizontal plate fixedly connected to the second lock. The vertical plate is perpendicular to the horizontal plate. The top of the long-hole iron plate has a circular target point. The adjusting bolt passes through the long hole of the long-hole iron plate and can move along the length of the hole.

2. The bridge gantry vibration amplification device applicable to video measurement as described in claim 1, characterized in that, Both the first and second latches are semi-circular structures, and both the first and second latches are provided with connecting holes for connecting with the U-shaped parts.

3. The bridge gantry vibration amplification device applicable to video measurement as described in claim 2, characterized in that, The spacing of the connecting holes is consistent with the bending radius of the U-shaped part.

4. The bridge suspender vibration amplification device applicable to video measurement as described in claim 1, characterized in that, The axis of the circular target point is parallel to the top horizontal edge of the elongated iron plate.

5. A bridge suspender vibration amplification device applicable to video measurement as described in claim 1, characterized in that, The thickness of the vertical plate shall not exceed one-half the thickness of the horizontal plate.

6. The bridge suspender vibration amplification device applicable to video measurement as described in claim 1, characterized in that, The circular target point is made of reflective material.

7. A bridge suspender vibration amplification device applicable to video measurement as described in claim 1, characterized in that, The screw portion of the adjusting bolt is fitted with the elongated hole, and the major diameter of the screw corresponds to the width of the elongated hole.

8. A bridge suspender vibration amplification device applicable to video measurement as described in claim 1, characterized in that, The first and second latches are connected and wrapped around the sling. The U-shaped piece is inserted into the connecting hole of the first and second latches to lock the first and second latches.

9. A bridge suspender vibration amplification device applicable to video measurement as described in claim 1, characterized in that, The sling lock has a double-layer structure. The inner layer of the sling lock has a rubber pad, and the contact surface between the rubber pad and the sling has anti-slip texture. The outer layer of the sling lock is a corrosion-resistant metal part.

10. A bridge suspender vibration amplification device applicable to video measurement as described in claim 9, characterized in that, The rubber pad layer is bonded to the metal part.

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