Telescopic target fixing device of cable force visual measurement system of cable-stayed cable

Abstract

This utility model belongs to the field of cable-stayed bridge target technology, specifically a telescopic target fixing device for a cable-stayed bridge force visual measurement system. Through a telescopic fixing bladder on the inner wall of the fixing ring, it can adapt to changes in the diameter of the steel cable caused by temperature and load variations. Rotating the knob drives the flow of hydraulic oil, ensuring the fixing bladder tightly fits against the outer wall of the steel cable, avoiding loosening or additional stress caused by rigid connections, and ensuring stable coupling between the detection housing and the steel cable. Furthermore, relying on the linkage structure of the detection ring, the adapter bladder, and the soft target, the deformation of the steel cable can be synchronously transmitted to the soft target. When the steel cable diameter changes, the adapter bladder drives the telescopic rod to adjust the height of the soft target through hydraulic transmission. When the steel cable extends or retracts axially, the detection ring drives the connecting plate to extend or retract the soft target laterally, accurately reflecting the deformation corresponding to changes in cable force. It is compatible with steel cables of different diameters, eliminating the need for customized multi-specification targets, reducing costs and improving applicability.

Description

Technical Field

[0001] This utility model relates to the field of cable-stayed bridge target technology, specifically a telescopic target fixing device for a visual measurement system of cable-stayed bridge force. Background Technology

[0002] The target of the cable force visual measurement system is the core reference component for realizing non-contact cable force monitoring. Its role is to ensure the accuracy control and data reliability of the measurement process. Through a specific geometric design, the target provides a clear and identifiable observation point for the visual sensor, ensuring that the camera can still stably capture target features under complex working conditions.

[0003] Existing targets, when installed, are often fixed in size and difficult to fit different diameter stay cables, leading to installation gaps or interference fits. This exacerbates the risk of loosening under vibration conditions and can even reduce the reliability of the connection between the target and the cable due to long-term friction and wear. In strong wind environments, rigid structures have high wind resistance and are easily affected by airflow disturbances, resulting in additional swaying. This leads to unstable feature signals captured by the visual sensor and increases the difficulty of algorithm recognition. Furthermore, if the target of the stay cable force visual measurement system does not have a telescopic function, it will significantly restrict the measurement reliability and engineering adaptability. When the stay cable undergoes axial expansion and contraction due to temperature fluctuations and load changes, the rigid target cannot deform synchronously, easily forming a forced constraint with the cable, causing additional stress. This results in distortion of the displacement signal transmitted by the target, failing to accurately reflect the strain state corresponding to the change in cable force, and directly affecting the accuracy of cable force inversion. Therefore, we propose a telescopic target fixing device for the stay cable force visual measurement system. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a telescopic target fixing device for a visual measurement system of cable tension in a cable-stayed bridge, thus solving the problem mentioned earlier.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A telescopic target fixing device for a cable-stayed bridge force visual measurement system includes a steel cable. A detection housing is fixedly clamped to the outside of the steel cable. Fixing rings are fixedly connected to both sides of the detection housing. Both fixing rings are hinged to the outside of the steel cable. Bolts are threaded onto the outside of both fixing rings. Three connecting plates are slidably connected to the top of the detection housing. The same soft target is sleeved on the outside of the three connecting plates.

[0007] The detection housing has three detection rings that are slidably connected inside. All three detection rings are hinged to the outside of the steel cable. Limiting grooves are opened on both sides of the three detection rings. Limiting blocks are fixedly connected to both sides of the inner wall of the detection housing. All three detection rings are slidably connected to the outside of the limiting blocks through the limiting grooves. All three connecting plates are snapped onto the top of the adjacent detection rings.

[0008] Preferably, the inner walls of the two fixing rings are fixedly connected to fixing bladders, and the two fixing bladders are arranged to extend inward. The inner walls of the detection housing are fixedly connected to hydraulic rings at both ends. The two fixing bladders are connected to adjacent hydraulic rings. The outer sides of the two hydraulic rings are connected to hydraulic pipes. One end of the two hydraulic pipes is connected to the same adjusting pipe, and the adjusting pipe is fixedly connected inside the detection housing.

[0009] Preferably, the adjusting tube is internally threaded with a threaded rod, one end of which is fixedly connected to a knob, and the other end of which is fixedly connected to a pressure plate. One side of the pressure plate is fixedly connected to a telescopic pressure tube, and one end of the telescopic pressure tube is fixedly connected to a drive plate, which is airtightly slidably connected inside the adjusting tube.

[0010] Preferably, a compression spring is movably sleeved on the outside of the telescopic pressure tube, and both ends of the compression spring abut against one end of the adjacent pressure plate and drive plate, and the inside of the fixing bladder is filled with hydraulic oil.

[0011] Preferably, each of the three detection rings has two hinge rods fixedly connected to its top, and the two hinge rods on the three detection rings are rotatably sleeved with the same hinge plate.

[0012] Preferably, each of the three detection rings has a sliding block slidably engaged at its top, and the three connecting plates are fixedly connected to the top of the adjacent sliding blocks. The top and bottom of the detection housing are provided with through slots, and the three sliding blocks are slidably connected inside the through slots at the top.

[0013] Preferably, a telescopic plate is fixedly connected to one side of each pair of sliding blocks, and one end of each pair of adjacent telescopic plates is fixedly connected to the same connecting block. The top of the connecting block is connected to a telescopic rod, and the top of the telescopic rod abuts against the top of the inner wall of the soft target.

[0014] Preferably, each of the three detection rings has an adapter capsule fixedly connected inside. The three adapter capsules are arranged in a horizontally telescopic manner. One side of each pair of opposite adapter capsules is connected to the same first connecting tube. The outside of each of the two first connecting tubes is connected to a second connecting tube. Each of the two second connecting tubes is connected to a nearby connecting block.

[0015] Beneficial effects

[0016] This invention provides a telescopic target fixing device for a visual measurement system of cable-stayed bridge tension. Compared with the prior art, it has the following advantages:

[0017] 1. This utility model uses a telescopic fixing bladder on the inner wall of the fixing ring to adapt to the diameter changes of the steel cable caused by temperature fluctuations and load changes. Rotating the knob drives the hydraulic oil flow, making the fixing bladder tightly fit the outer wall of the steel cable, avoiding loosening or additional stress caused by rigid connection, ensuring stable coupling between the detection housing and the steel cable, solving the gap or interference problem caused by steel cable deformation in traditional fixing devices, and providing a reliable benchmark for measurement.

[0018] 2. This practical system utilizes a linkage structure between the detection clasp, adapter bladder, and soft target. The deformation of the steel cable can be synchronously transmitted to the soft target. When the diameter of the steel cable changes, the adapter bladder adjusts the height of the soft target by hydraulically driving the telescopic rod. When the steel cable extends or retracts axially, the detection clasp drives the connecting plate to extend or retract the soft target laterally, accurately reflecting the deformation state corresponding to the change in cable force. It is also compatible with steel cables of different diameters, eliminating the need for customized multi-specification targets, reducing costs and improving system applicability. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the hydraulic ring part of this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the internal structure of the regulating tube of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the adapter capsule portion of this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the hinge plate portion of this utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the telescopic rod part of this utility model.

[0025] In the diagram: 1. Steel cable; 2. Detection housing; 3. Fixing shackle; 4. Bolt; 5. Through groove; 6. Sliding block; 7. Soft target; 8. Fixing bladder; 9. Hydraulic ring; 10. Hydraulic pipe; 11. Adjusting pipe; 12. Knob; 13. Threaded rod; 14. Pressure plate; 15. Telescopic pressure pipe; 16. Compression spring; 17. Drive plate; 18. Detection shackle; 19. Limiting block; 20. Limiting groove; 21. Adaptor bladder; 22. First connecting pipe; 23. Second connecting pipe; 24. Connecting block; 25. Telescopic plate; 26. Telescopic rod; 27. Connecting plate; 28. Hinge rod; 29. ​​Hinge plate. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-6 This utility model provides a technical solution:

[0028] The telescopic target fixing device of the cable force visual measurement system includes a steel cable 1, a detection housing 2 is fixedly clamped to the outside of the steel cable 1, and fixing rings 3 are fixedly connected to both sides of the detection housing 2. Both fixing rings 3 are hinged to the outside of the steel cable 1, and bolts 4 are threaded to the outside of both fixing rings 3.

[0029] The inner walls of the two retaining rings 3 are fixedly connected to retaining bladders 8, and the two retaining bladders 8 are arranged to extend inward. The inner walls of the detection housing 2 are fixedly connected to hydraulic rings 9 at both ends. The two retaining bladders 8 are connected to the adjacent hydraulic rings 9. The outer sides of the two hydraulic rings 9 are connected to hydraulic pipes 10. One end of the two hydraulic pipes 10 is connected to the same adjusting pipe 11. The adjusting pipe 11 is fixedly connected inside the detection housing 2.

[0030] The adjusting tube 11 is internally threaded with a threaded rod 13. One end of the threaded rod 13 is fixedly connected to a knob 12, and the other end of the threaded rod 13 is fixedly connected to a pressure plate 14. One side of the pressure plate 14 is fixedly connected to a telescopic pressure tube 15, and one end of the telescopic pressure tube 15 is fixedly connected to a drive plate 17. The drive plate 17 is airtightly slidably connected inside the adjusting tube 11. A compression spring 16 is movably sleeved on the outside of the telescopic pressure tube 15. Both ends of the compression spring 16 abut against one end of the adjacent pressure plate 14 and drive plate 17. The fixed bladder 8 is filled with hydraulic oil.

[0031] With the above-described structure, even when the diameter of the steel cable 1 changes due to axial expansion and contraction caused by temperature fluctuations and load variations, the detection housing 2 can still be fixed to the outside of the steel cable 1. This prevents the detection housing 2 from sliding outside the steel cable 1, which would reduce measurement accuracy. Specifically, during installation, the detection housing 2 is opened and placed in the installation position on the steel cable 1. Then, the detection housing 2 is closed, which causes the fixing rings 3 to close. The bolts 4 on the two fixing rings 3 are then rotated to secure them, indirectly fixing the detection housing 2 to the outside of the steel cable 1. Simultaneously, the knob 12 is rotated... The rotation of 12 drives the threaded rod 13 to rotate at one end of the adjusting tube 11. The rotation of the threaded rod 13 drives the pressure plate 14 to slide inside the adjusting tube 11. The sliding of the pressure plate 14 inside the adjusting tube 11 drives the compression spring 16 and the telescopic pressure tube 15 to extend and retract. At the same time, it drives the drive plate 17 to slide inside the adjusting tube 11, thereby controlling the pressure of the hydraulic oil inside the adjusting tube 11 and causing the fixing bladder 8 inside the two fixing rings 3 to expand, so that the inner wall of the fixing bladder 8 is tightly fitted with the outer wall of the steel cable 1. This prevents the inner wall of the fixing ring 3 from separating from the outer wall of the steel cable 1 when the diameter of the steel cable 1 changes due to axial expansion and contraction caused by temperature fluctuations and load changes.

[0032] It is worth mentioning that when the diameter of the steel cable 1 changes, the fixing bladder 8 is squeezed. At this time, the pressure inside the fixing bladder 8 can be effectively adjusted by the telescopic pressure tube 15 and the compression spring 16.

[0033] The top of the detection housing 2 is slidably connected with three connecting plates 27. The three connecting plates 27 are fitted with the same soft target 7. The soft target 7 is made of stretchable rubber and is used for the detection of the steel cable 1.

[0034] The detection housing 2 has three detection rings 18 that are slidably connected inside. All three detection rings 18 are hinged to the outside of the steel cable 1. Limiting grooves 20 are opened on both sides of the three detection rings 18. Limiting blocks 19 are fixedly connected to both sides of the inner wall of the detection housing 2. All three detection rings 18 are slidably connected to the outside of the limiting blocks 19 through the limiting grooves 20. All three connecting plates 27 are snapped onto the top of the adjacent detection rings 18.

[0035] Two hinge rods 28 are fixedly connected to the top of each of the three detection rings 18, and the two hinge rods 28 on the three detection rings 18 are rotatably sleeved with the same hinge plate 29.

[0036] The top of each of the three detection rings 18 is slidably engaged with a sliding block 6, and the three connecting plates 27 are fixedly connected to the top of the adjacent sliding blocks 6. The top and bottom of the detection housing 2 are provided with through grooves 5, and the three sliding blocks 6 are slidably connected inside the through groove 5 at the top.

[0037] A telescopic plate 25 is fixedly connected to one side of each pair of sliding blocks 6. One end of each pair of adjacent telescopic plates 25 is fixedly connected to the same connecting block 24. The top of the connecting block 24 is connected to a telescopic rod 26, and the top of the telescopic rod 26 abuts against the top of the inner wall of the soft target 7.

[0038] The three detection rings 18 are all fixedly connected to the internal parts of the adapter bladders 21. The three adapter bladders 21 are arranged in a horizontal telescopic manner. Each pair of opposite adapter bladders 21 are connected to the same first connecting pipe 22 on one side. The two first connecting pipes 22 are connected to the outside of the second connecting pipes 23. The two second connecting pipes 23 are connected to the adjacent connecting blocks 24. The adapter bladders 21 are filled with hydraulic oil.

[0039] With the above-mentioned structure, the changes in the diameter and length of the steel cable 1 can be physically displayed by the soft target 7, which facilitates the monitoring of the steel cable 1.

[0040] When the diameter of the steel cable 1 changes, the change in the diameter of the steel cable 1 causes the three adapter bladders 21 to expand. The expansion of the three adapter bladders 21 causes the telescopic rod 26 to contract. The contraction of the telescopic rod 26 causes the soft target 7 to move from top to bottom. At the same time, the soft target 7 slides outside the connecting plate 27. By detecting the height of the soft target 7, it can be known whether the diameter of the steel cable 1 has changed.

[0041] When the length of the steel cable 1 changes, the extension and retraction of the steel cable 1 causes the three detection rings 18 to slide inside the detection housing 2. The sliding of the three detection rings 18 causes the three sliding blocks 6 on them to slide. The sliding of the three sliding blocks 6 causes the connecting plate 27 on them to slide. The sliding of the three connecting plates 27 causes the soft target 7 to extend and retract laterally. By detecting the lateral length of the soft target 7, it can be known whether the length of the steel cable 1 has changed.

[0042] Working principle: When it is necessary to install the soft target 7, the detection housing 2 is opened and placed in the position to be installed on the steel cable 1. At this time, the detection housing 2 is closed, and the closing of the detection housing 2 drives the fixing rings 3 to close. Then, the bolts 4 on the two fixing rings 3 are rotated to fix the two fixing rings 3, indirectly fixing the detection housing 2 to the outside of the steel cable 1, and installing and fixing the soft target 7.

[0043] Simultaneously, rotating knob 12 causes threaded rod 13 to rotate at one end of adjusting tube 11. The rotation of threaded rod 13 causes pressure plate 14 to slide inside adjusting tube 11. The sliding of pressure plate 14 inside adjusting tube 11 causes compression spring 16 and telescopic pressure tube 15 to extend and retract. At the same time, it causes drive plate 17 to slide inside adjusting tube 11, controlling the pressure of hydraulic oil inside adjusting tube 11 and causing the fixing bladder 8 inside the two fixing rings 3 to expand, so that the inner wall of fixing bladder 8 is tightly fitted with the outer wall of steel cable 1. This prevents the inner wall of fixing ring 3 from separating from the outer wall of steel cable 1 when the diameter of steel cable 1 changes due to axial expansion and contraction caused by temperature fluctuations and load changes.

[0044] When the diameter of the steel cable 1 changes, the change in the diameter of the steel cable 1 causes the three adapter bladders 21 to expand. The expansion of the three adapter bladders 21 causes the telescopic rod 26 to contract. The contraction of the telescopic rod 26 causes the soft target 7 to move from top to bottom. At the same time, the soft target 7 slides outside the connecting plate 27. By detecting the height of the soft target 7, it can be known whether the diameter of the steel cable 1 has changed.

[0045] When the length of the steel cable 1 changes, the extension and retraction of the steel cable 1 causes the three detection rings 18 to slide inside the detection housing 2. The sliding of the three detection rings 18 causes the three sliding blocks 6 on them to slide. The sliding of the three sliding blocks 6 causes the connecting plate 27 on them to slide. The sliding of the three connecting plates 27 causes the soft target 7 to extend and retract laterally. By detecting the lateral length of the soft target 7, it can be known whether the length of the steel cable 1 has changed.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A telescopic target fixing device for a visual measurement system of cable tension in a cable-stayed bridge, comprising a steel cable (1), characterized in that: The steel cable (1) is fixedly connected to the outside of the detection housing (2). Both sides of the detection housing (2) are fixedly connected to the fixing rings (3). Both fixing rings (3) are hinged to the outside of the steel cable (1). Both fixing rings (3) are threaded with bolts (4). The top of the detection housing (2) is slidably connected to three connecting plates (27). The three connecting plates (27) are fitted with the same soft target (7). The detection housing (2) has three detection rings (18) slidably connected inside. All three detection rings (18) are hinged to the outside of the steel cable (1). Limiting grooves (20) are opened on both sides of the three detection rings (18). Limiting blocks (19) are fixedly connected to both sides of the inner wall of the detection housing (2). All three detection rings (18) are slidably connected to the outside of the limiting blocks (19) through the limiting grooves (20). All three connecting plates (27) are snapped onto the top of the adjacent detection rings (18).

2. The telescopic target fixing device of the cable-stayed bridge force visual measurement system according to claim 1, characterized in that: The inner walls of the two fixed retaining rings (3) are fixedly connected to fixed bladders (8), and the two fixed bladders (8) are arranged to extend inward. The inner walls of the detection housing (2) are fixedly connected to hydraulic rings (9) at both ends. The two fixed bladders (8) are connected to the adjacent hydraulic rings (9). The outer sides of the two hydraulic rings (9) are connected to hydraulic pipes (10). One end of the two hydraulic pipes (10) is connected to the same regulating pipe (11). The regulating pipe (11) is fixedly connected inside the detection housing (2).

3. The telescopic target fixing device of the cable-stayed bridge force visual measurement system according to claim 2, characterized in that: The regulating tube (11) is internally threaded with a threaded rod (13). One end of the threaded rod (13) is fixedly connected to a knob (12), and the other end of the threaded rod (13) is fixedly connected to a pressure plate (14). One side of the pressure plate (14) is fixedly connected to a telescopic pressure tube (15), and one end of the telescopic pressure tube (15) is fixedly connected to a drive plate (17). The drive plate (17) is airtightly slidably connected inside the regulating tube (11).

4. The telescopic target fixing device of the cable force visual measurement system according to claim 3, characterized in that: The telescopic pressure tube (15) is externally fitted with a compression spring (16), both ends of which abut against one end of the adjacent pressure plate (14) and drive plate (17). The fixed bladder (8) is filled with hydraulic oil.

5. The telescopic target fixing device of the cable force visual measurement system according to claim 1, characterized in that: Two hinge rods (28) are fixedly connected to the top of each of the three detection rings (18), and the two hinge rods (28) on the three detection rings (18) are rotatably sleeved with the same hinge plate (29).

6. The telescopic target fixing device of the cable force visual measurement system according to claim 5, characterized in that: The top of each of the three detection rings (18) is slidably engaged with a sliding block (6), and the three connecting plates (27) are fixedly connected to the top of the adjacent sliding blocks (6). The top and bottom of the detection housing (2) are provided with through grooves (5), and the three sliding blocks (6) are slidably connected inside the through grooves (5) at the top.

7. The telescopic target fixing device of the cable-stayed bridge force visual measurement system according to claim 6, characterized in that: A telescopic plate (25) is fixedly connected to one side of each pair of sliding blocks (6), and one end of each pair of adjacent telescopic plates (25) is fixedly connected to the same connecting block (24). The top of the connecting block (24) is connected to a telescopic rod (26), and the top of the telescopic rod (26) abuts against the top of the inner wall of the soft target (7).

8. The telescopic target fixing device of the cable force visual measurement system according to claim 7, characterized in that: The three detection rings (18) are all fixedly connected to the inside of the adapter sacs (21). The three adapter sacs (21) are arranged in a horizontal telescopic manner. Each pair of opposite adapter sacs (21) are connected to the same first connecting tube (22) on one side. The two first connecting tubes (22) are connected to the outside of the second connecting tubes (23). The two second connecting tubes (23) are connected to the adjacent connecting block (24).

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