Cable force measuring device based on machine vision

Abstract

The utility model belongs to the technical field of cable force measuring devices, and particularly relates to a cable force measuring device based on machine vision, which comprises a base, a mounting box is mounted at the top of the base, a high-speed camera is arranged at the top of the mounting box, and lifting of the high-speed camera on the base is realized through a lifting assembly. The three sets of bottom plates are pasted to the ground through adhesives, rotating plates rotate on first fixing plates welded to the tops of the bottom plates, rotating blocks rotate on the tops of the rotating plates, plane rotation and angle adjustment of clamping blocks are achieved, three sets of supporting pipes are rotationally installed on the side wall of the base, and first sliding rods are arranged in the supporting pipes in a sliding and penetrating mode; the first sliding rod is fixed to the clamping block through the clamping assembly at the bottom of the first sliding rod, so that rapid installation and placement stability of the high-speed camera are achieved, and rapid disassembly and installation of the high-speed camera at multiple positions of a bridge can be achieved through cooperation of a plurality of sets of bottom plates.

Description

Technical Field

[0001] This utility model relates to the technical field of cable force measurement devices, specifically a cable force measurement device based on machine vision. Background Technology

[0002] With the development of modern engineering technology, the safety and reliability of large structures such as bridges, towers, and cable cranes are receiving increasing attention. Cable force (i.e., the tension in cables or cables) is one of the important parameters for monitoring the health of these structures. Traditionally, cable force measurement mainly relies on contact methods such as strain gauges and pressure sensors, but these methods have problems such as complex installation, susceptibility to environmental influences, and difficulty in real-time monitoring. In recent years, non-contact cable force measurement technology based on machine vision has gradually become a research hotspot. It not only overcomes the limitations of traditional methods but also provides a more flexible and efficient solution.

[0003] In the prior art, many structures that need to monitor cable force (such as bridges, towers, etc.) are located in outdoor environments. These places are often affected by various factors such as wind, rain, and vibration, which cause high-speed cameras to shake, affecting image stability and thus affecting imaging quality and measurement results. To improve the stability of high-speed camera placement, we propose a cable force measurement device based on machine vision. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a cable force measurement device based on machine vision. Three sets of support tubes are rotatably installed on the side wall of the base. A sliding rod is slidably inserted inside the support tube. The sliding rod is fixed to the clamping block by a clamping component at the bottom of the sliding rod, thereby achieving rapid installation and stable placement of the high-speed camera. Furthermore, by cooperating with several sets of base plates, the high-speed camera can be quickly disassembled and installed at multiple locations on the bridge, solving the background problem.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cable force measurement device based on machine vision, comprising a base, a mounting box mounted on the top of the base, a high-speed camera mounted on the top of the mounting box, a lifting assembly for raising and lowering the high-speed camera mounted between the base and the mounting box, three sets of support tubes rotatably mounted on the side wall of the base, a sliding rod slidably passing through the inside of the support tubes, a base plate mounted on the bottom side of the sliding rod, a fixing plate welded to the top of the base plate, a rotating plate rotatably mounted on the top of the fixing plate, a rotating block rotatably mounted on the top of the rotating plate, a clamping block fixedly welded to the top of the rotating block, and a clamping assembly mounted between the bottom of the sliding rod and the clamping block.

[0006] Preferably, the lifting assembly includes a worm gear, which is rotatably mounted inside the mounting box. A worm is rotatably mounted on the rear side of the mounting box, and the worm gear meshes with the worm. A handle is fixedly connected to the rear end of the worm. A threaded tube is threaded through the worm gear, and the top end of the threaded tube slides out of the top side of the mounting box. The high-speed camera is fixedly mounted on the top end of the threaded tube. The bottom end of the threaded tube passes through the base and the mounting box and extends out. A fixing tube is fixedly connected to the bottom side of the base. A spline shaft is fixedly connected to the bottom side inside the fixing tube. A spline groove is formed inside the threaded tube, and the spline groove is slidably connected to the spline shaft.

[0007] Preferably, the clamping assembly includes a second sliding rod. The bottom of the first sliding rod has a first sliding groove, and the bottom end of the first sliding rod has several claw placement grooves. Claws are rotatably mounted on the claw placement grooves. A connecting rod is hinged to the top side of the claws. The top end of the connecting rod is hinged to the bottom of the second sliding rod. The second sliding rod is disposed inside the first sliding groove. A sliding plate is fixedly sleeved on the outer surface of the second sliding rod. A second fixing plate is fixedly connected to the inner wall of the first sliding groove. A spring is sleeved on the outer surface of the second sliding rod. The top and bottom sides of the spring abut against the sliding plate and the second fixing plate, respectively. An unlocking mechanism is also installed at the bottom of the first sliding rod.

[0008] Preferably, the unlocking mechanism includes a sliding sleeve, which is slidably fitted onto the bottom outer surface of the sliding rod one. The bottom outer surface of the sliding rod one is also provided with a plurality of sliding grooves two. Each of the plurality of sliding grooves two is slidably connected to a sliding rod three. The ends of the plurality of sliding rods three that are close to the sliding rod two are fixedly connected to the sliding rod two, and the ends of the plurality of sliding rods three that are away from the sliding rod two are fixedly connected to the inner wall of the sliding sleeve.

[0009] Preferably, a bolt is threaded through the bottom of the support tube, and one end of the bolt abuts against the outer surface of the sliding rod.

[0010] Preferably, a rubber anti-slip pad is fixedly connected to the inner surface of the gripper.

[0011] This invention provides a cable force measurement device based on machine vision. Compared with the prior art, it has the following advantages:

[0012] 1. This machine vision-based cable force measurement device has a mounting box installed on the top of the base, and a high-speed camera is installed on the top of the mounting box. The high-speed camera is raised and lowered on the base by a lifting assembly. Three sets of base plates are glued to the ground with adhesive. A rotating plate rotates on a fixed plate welded to the top of the base plate, and a rotating block rotates on the top of the rotating plate to achieve planar rotation and angle adjustment of the clamping block. Three sets of support tubes are rotatably installed on the side wall of the base. A sliding rod is slidably inserted inside the support tube. The sliding rod is fixed to the clamping block by a clamping assembly at the bottom of the sliding rod. This achieves rapid installation and stable placement of the high-speed camera. Furthermore, by using several sets of base plates, the high-speed camera can be quickly disassembled and installed at multiple locations on the bridge. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the main body of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the lifting component of this utility model;

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the connection between the support tube and the sliding rod of this utility model;

[0016] Figure 4 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0017] Figure 5 This utility model Figure 3 Enlarged schematic diagram of the structure at point B.

[0018] In the diagram: 1. Base; 2. Support tube; 3. Mounting box; 4. High-speed camera; 5. Sliding rod one; 6. Bolt; 7. Fixing tube; 8. Threaded tube; 9. Worm gear; 10. Splined groove; 11. Splined shaft; 12. Worm; 13. Handle; 14. Base plate; 15. Fixing plate one; 16. Rotating plate; 17. Rotating block; 18. Clamping block; 19. Sliding groove one; 20. Claw placement groove; 21. Claw; 22. Connecting rod; 23. Sliding rod two; 24. Sliding sleeve; 25. Spring; 26. Sliding plate; 27. Sliding rod three; 28. Sliding groove two; 29. ​​Fixing plate two. Detailed Implementation

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

[0020] Please see Figure 1-5 This utility model provides a technical solution: a cable force measurement device based on machine vision, including a base 1, an installation box 3 mounted on the top of the base 1, a high-speed camera 4 mounted on the top of the installation box 3, a lifting assembly for raising and lowering the high-speed camera 4 installed between the base 1 and the installation box 3, three sets of support tubes 2 rotatably mounted on the side wall of the base 1, a sliding rod 5 slidably passing through the inside of the support tubes 2, a base plate 14 provided on the bottom side of the sliding rod 5, a fixing plate 15 welded to the top of the base plate 14, a rotating plate 16 rotatably mounted on the top of the fixing plate 15, a rotating block 17 rotatably mounted on the top of the rotating plate 16, a clamping block 18 fixedly welded to the top of the rotating block 17, and a clamping assembly installed between the bottom of the sliding rod 5 and the clamping block 18.

[0021] This machine vision-based cable force measurement device uses a high-speed camera 4 installed near the cable to capture real-time images of the cable at a high frame rate. Image processing algorithms are then used to accurately identify and track marker points or feature points on the cable, monitoring its displacement, deformation, or vibration patterns. Based on this image data, the system calculates the cable's geometric changes or vibration frequency, and, combined with formulas from elasticity mechanics or vibration theory, deduces the actual tension value within the cable, thus achieving non-contact, high-precision cable force measurement. A mounting box 3 is installed on top of the base 1, and the high-speed camera 4 is positioned on top of the mounting box 3. A lifting assembly allows the high-speed camera 4 to be raised and lowered on the base 1. Three sets of base plates 14 are attached to the ground with adhesive, and a rotating plate 16 rotates on a fixed plate 15 welded to the top of the base plate 14. A rotating block 17 rotates on the top of the rotating plate 16, realizing the planar rotation and angle adjustment of the clamping block 18. Three sets of support tubes 2 are rotatably installed on the side wall of the base 1. A sliding rod 5 slides through the inside of the support tube 2. The sliding rod 5 is fixed to the clamping block 18 by the clamping assembly at the bottom of the sliding rod 5, thereby realizing the rapid installation and stable placement of the high-speed camera 4. Furthermore, by cooperating with several sets of base plates 14, the high-speed camera 4 can be quickly disassembled and installed at multiple locations on the bridge.

[0022] The lifting assembly includes a worm gear 9, which is rotatably installed inside the mounting box 3. A worm 12 is rotatably installed on the rear side of the mounting box 3. The worm gear 9 meshes with the worm 12. A handle 13 is fixedly connected to the rear end of the worm 12. A threaded tube 8 is threaded through the worm gear 9. The top end of the threaded tube 8 slides out of the top side of the mounting box 3, and the high-speed camera 4 is fixedly installed on the top end of the threaded tube 8. The bottom end of the threaded tube 8 passes through the base 1 and the mounting box 3 and extends out. A fixing tube 7 is fixedly connected to the bottom side of the base 1. A spline shaft 11 is fixedly connected to the bottom side inside the fixing tube 7. A spline groove 10 is opened through the inside of the threaded tube 8. The spline groove 10 is slidably connected to the spline shaft 11.

[0023] When the lifting assembly is in use, the worm gear 12 is rotated by turning the handle 13, which in turn rotates the worm wheel 9 that meshes with the worm gear 12. Since the threaded tube 8 is threaded through the worm wheel 9, the threaded tube 8 is connected to the spline shaft 11 fixedly connected to the bottom side of the fixed tube 7 through the spline groove 10 opened inside to achieve sliding limit. Therefore, when the worm wheel 9 rotates, the threaded tube 8 slides upward on the spline shaft 11, thereby realizing the lifting of the high-speed camera 4.

[0024] The clamping assembly includes a second sliding rod 23. The bottom of the first sliding rod 5 has a sliding groove 19, and the bottom end of the first sliding rod 5 has several claw placement grooves 20. Claws 21 are rotatably mounted on the claw placement grooves 20. A connecting rod 22 is hinged to the top side of the claw 21. The top end of the connecting rod 22 is hinged to the bottom of the second sliding rod 23. The second sliding rod 23 is located inside the sliding groove 19. A sliding plate 26 is fixedly sleeved on the outer surface of the second sliding rod 23. A fixing plate 29 is fixedly connected to the inner wall of the sliding groove 19. A spring 25 is sleeved on the outer surface of the second sliding rod 23. The top and bottom sides of the spring 25 abut against the sliding plate 26 and the fixing plate 29, respectively. An unlocking mechanism is also installed at the bottom of the first sliding rod 5.

[0025] The unlocking mechanism includes a sliding sleeve 24, which is slidably fitted on the bottom outer surface of the sliding rod 5. The bottom outer surface of the sliding rod 5 is also provided with several sliding grooves 28. Each of the sliding grooves 28 is slidably connected to a sliding rod 27. The end of each sliding rod 27 near the sliding rod 23 is fixedly connected to the sliding rod 23, and the end of each sliding rod 27 away from the sliding rod 23 is fixedly connected to the inner wall of the sliding sleeve 24.

[0026] When the clamping assembly is in use, the sliding sleeve 24 slides downward on the sliding rod 5, thereby causing the sliding rod 27 to slide downward on the sliding groove 28, and then causing the sliding rod 23 to slide downward inside the sliding groove 19. Since several grippers 21 are rotatably installed inside several gripper placement grooves 20, and the top side of several grippers 21 is hinged to a connecting rod 22, and the top end of the connecting rod 22 is hinged to the bottom of the sliding rod 23, the sliding rod 23 slides downward, causing several grippers 21 to open outward and be placed on the upper side of the clamping block 18. The sliding sleeve 24 is released, and under the action of the spring 25, the sliding plate 26 is pushed, thereby pushing the sliding rod 23 to slide upward, so that several grippers 21 clamp the clamping block 18.

[0027] A bolt 6 is threaded through the bottom of the support tube 2. One end of the bolt 6 abuts against the outer surface of the sliding rod 5, thereby completing the connection and fixation between the support tube 2 and the sliding rod 5.

[0028] A rubber anti-slip pad is fixedly connected to the inner surface of the gripper 21 to prevent the gripper 21 from sliding when clamping.

[0029] Working principle: This machine vision-based cable force measurement device uses a high-speed camera 4 installed near the cable to capture real-time images of the cable at a high frame rate. Then, it uses image processing algorithms to accurately identify and track marker points or feature points on the cable, monitoring its displacement, deformation, or vibration patterns. The system calculates the geometric changes or vibration frequencies of the cable based on these image data, and combines elasticity or vibration theory formulas to deduce the actual tension value within the cable, thereby achieving non-contact, high-precision cable force measurement. A mounting box 3 is installed on the top of the base 1, and the high-speed camera 4 is set on the top of the mounting box 3. By rotating the handle 13, the worm gear 12 is rotated, which in turn rotates the worm wheel 9 meshing with the worm gear 12. Since the threaded tube 8 is threaded through the worm wheel 9, the threaded tube 8 achieves sliding limit by cooperating with the spline shaft 11 fixedly connected to the bottom side of the fixed tube 7 through the spline groove 10 opened inside. Therefore, when the worm wheel 9 rotates, the threaded tube 8 slides upward on the spline shaft 11, thereby realizing the raising and lowering of the high-speed camera 4.

[0030] Three sets of base plates 14 are glued to the ground with adhesive. A rotating plate 16 rotates on a fixed plate 15 welded to the top of the base plates 14. A rotating block 17 rotates on the top of the rotating plate 16, enabling the planar rotation and angle adjustment of the clamping block 18. Three sets of support tubes 2 are rotatably installed on the side wall of the base 1. A sliding rod 5 slides through the inside of the support tube 2. The sliding sleeve 24 slides downward on the sliding rod 5, thereby driving the sliding rod 27 to slide downward on the sliding groove 28, and further driving the sliding rod 23 to slide downward inside the sliding groove 19. Since several grippers 21 are rotatably installed inside several gripper placement grooves 20, Furthermore, a connecting rod 22 is hinged to the top side of several grippers 21, and the top of the connecting rod 22 is hinged to the bottom of the sliding rod 23. Therefore, the sliding rod 23 slides downward, causing several grippers 21 to open outward and be placed on the upper side of the clamping block 18. When the sliding sleeve 24 is released, the sliding plate 26 is pushed under the action of the spring 25, thereby pushing the sliding rod 23 to slide upward, so that several grippers 21 clamp the clamping block 18, and the sliding rod 5 is fixed on the clamping block 18, thereby realizing the rapid installation and stable placement of the high-speed camera 4. Moreover, through the cooperation of several sets of base plates 14, the high-speed camera 4 can be quickly disassembled and installed at multiple locations on the bridge.

[0031] 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.

[0032] 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 cable force measuring device based on machine vision, comprising a base (1), characterized in that: A mounting box (3) is installed on the top of the base (1), and a high-speed camera (4) is installed on the top of the mounting box (3). A lifting assembly for raising and lowering the high-speed camera (4) is installed between the base (1) and the mounting box (3). Three sets of support tubes (2) are rotatably installed on the side wall of the base (1). A sliding rod (5) is slidably inserted inside the support tube (2). A base plate (14) is provided on the bottom side of the sliding rod (5). A fixing plate (15) is welded to the top of the base plate (14). A rotating plate (16) is rotatably installed on the top of the fixing plate (15). A rotating block (17) is rotatably installed on the top of the rotating plate (16). A clamping block (18) is fixedly welded to the top of the rotating block (17). A clamping assembly is installed between the bottom of the sliding rod (5) and the clamping block (18).

2. The cable force measuring device based on machine vision according to claim 1, characterized in that: The lifting assembly includes a worm gear (9), which is rotatably mounted inside the mounting box (3). A worm (12) is rotatably mounted on the rear side of the mounting box (3). The worm gear (9) meshes with the worm (12). A handle (13) is fixedly connected to the rear end of the worm (12). A threaded tube (8) is threaded through the worm gear (9). The top end of the threaded tube (8) slides out of the top side of the mounting box (3), and the high-speed camera (4) is fixedly mounted on the top end of the threaded tube (8). The bottom end of the threaded tube (8) passes through the base (1) and the mounting box (3) and extends out. A fixing tube (7) is fixedly connected to the bottom side of the base (1). A spline shaft (11) is fixedly connected to the bottom side inside the fixing tube (7). A spline groove (10) is opened through the inside of the threaded tube (8). The spline groove (10) is slidably connected to the spline shaft (11).

3. The cable force measuring device based on machine vision according to claim 2, characterized in that: The clamping assembly includes a second sliding rod (23). The bottom of the first sliding rod (5) is provided with a first sliding groove (19), and the bottom end of the first sliding rod (5) is provided with several claw placement grooves (20). Claws (21) are rotatably installed on the claw placement grooves (20). A connecting rod (22) is hinged to the top side of the claw (21). The top end of the connecting rod (22) is hinged to the bottom of the second sliding rod (23). The second sliding rod (23) is located inside the first sliding groove (19). A sliding plate (26) is fixedly sleeved on the outer surface of the second sliding rod (23). A fixing plate (29) is fixedly connected to the inner wall of the first sliding groove (19). A spring (25) is sleeved on the outer surface of the second sliding rod (23). The top and bottom sides of the spring (25) abut against the sliding plate (26) and the fixing plate (29) respectively. An unlocking mechanism is also installed at the bottom of the first sliding rod (5).

4. The cable force measuring device based on machine vision according to claim 3, characterized in that: The unlocking mechanism includes a sliding sleeve (24), which is slidably fitted on the bottom outer surface of the sliding rod (5). The bottom outer surface of the sliding rod (5) is also provided with several sliding grooves (28). Each of the several sliding grooves (28) is slidably connected to a sliding rod (27). The end of each sliding rod (27) near the sliding rod (23) is fixedly connected to the sliding rod (23), and the end of each sliding rod (27) away from the sliding rod (23) is fixedly connected to the inner wall of the sliding sleeve (24).

5. The cable force measuring device based on machine vision according to claim 4, characterized in that: The bottom of the support tube (2) is threaded with a bolt (6), and one end of the bolt (6) abuts against the outer surface of the sliding rod (5).

6. The cable force measuring device based on machine vision according to claim 5, characterized in that: A rubber anti-slip pad is fixedly connected to the inner surface of the gripper (21).

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