A bridge stay cable tensile resonance detection device with a wind force simulation function

Abstract

The present invention discloses a bridge cable tensile resonance detection device with a wind force simulation function. The bridge tensile resonance detection device includes a frame, a clamping mechanism, a tensile mechanism, and a wind force simulation mechanism. The clamping mechanism is fixedly connected to the frame, the tensile mechanism is fixedly connected to the clamping mechanism, and the wind force simulation mechanism is fixedly connected to the frame. The clamping mechanism is used to fix the cable, and the tensile mechanism is used to perform tensile detection on the cable. During detection, first, the cable is cut into a suitable length, then the cable is fixed to the detection device through the clamping mechanism, and the tensile mechanism is started to drive the clamping mechanism to move, so as to perform tensile detection on the cable. When resonance detection is required, the wind force simulation mechanism is started to simulate the vibration generated by the wind force and transmit the vibration to the cable, and the deformation amount of the cable during vibration is detected, so as to judge the anti-vibration performance of the cable.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge detection, and particularly to a bridge cable stretching resonance detection device with a wind force simulation function. Background Technique

[0002] A bridge generally refers to a building erected on a river for vehicles and pedestrians to pass through. With the rapid development of the transportation industry, various bridges emerge in an endless stream. Suspension bridges have been widely used due to their excellent performance. The suspension bridge mainly uses cables to bear the weight of the bridge deck, which requires the cables to have a high tensile strength to prevent the cables from breaking during use. In addition, the suspension bridge has a large span and a more flexible overall structure. When the bridge deck is affected by wind force, it will shake, which will drive the cables to resonate. Therefore, the strength of the cables themselves needs to meet the corresponding design requirements, and it is necessary to conduct stretching resonance detection on the produced cables.

[0003] However, existing detection devices often simulate the shaking caused by wind blowing on the bridge deck through the vibration of relevant mechanisms such as vibration motors. The vibration amplitude cannot be adjusted in real time, and the simulation effect is not good, resulting in the inability to guarantee the detection accuracy. Summary of the Invention

[0004] The purpose of the present invention is to provide a bridge cable stretching resonance detection device with a wind force simulation function to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: The bridge stretching resonance detection device includes a frame, a clamping mechanism, a stretching mechanism, and a wind force simulation mechanism. The clamping mechanism is fixedly connected to the frame, the stretching mechanism is fixedly connected to the clamping mechanism, and the wind force simulation mechanism is fixedly connected to the frame. The clamping mechanism is used to fix the cable, and the stretching mechanism is used to perform stretching detection on the cable.

[0006] The frame is used to provide stable support for each mechanism. When the bridge deck is blown by wind force, it will shake, which will drive the bridge cables to vibrate. Therefore, the bridge cables need to have a certain anti-vibration and anti-tensile ability to ensure the overall safety of the bridge. Therefore, it is necessary to conduct stretching resonance detection on the bridge cables, and it is necessary to simulate the vibration caused by wind force to fit the actual use environment and ensure the accuracy of the detection. During the detection, first cut the cable into a suitable length, then fix the cable to the detection device through the clamping mechanism, and start the stretching mechanism to drive the clamping mechanism to move, so as to perform stretching detection on the cable. When resonance detection is required, start the wind force simulation mechanism to simulate the vibration generated by wind force and transmit the vibration to the cable, and detect the deformation amount of the cable during vibration to judge the anti-vibration performance of the cable.

[0007] Furthermore, the clamping mechanism includes an upper jaw and a lower jaw, the upper jaw is tightly connected to the stretching mechanism, and the lower jaw is tightly connected to the frame. A load sensor and a displacement sensor are provided on the upper jaw. The load sensor is used to measure the force applied to the cable, and the displacement sensor is used to measure the deformation of the cable.

[0008] The clamping mechanism fixes the cable at the detection position through the upper jaw and the lower jaw, so that the stretching mechanism drives the upper jaw to move, thereby stretching the cable, and detects the tension and deformation of the cable during stretching through the load sensor and displacement sensor integrated in the upper jaw. The load sensor and displacement sensor are connected to an external detection system to analyze the measured data to obtain accurate data.

[0009] Furthermore, the stretching mechanism includes a crossbeam and a screw nut assembly, the screw nut assembly is firmly connected to the frame, the screw nut assembly is transmission-connected to the crossbeam, the crossbeam is slidably connected to the frame, and the crossbeam is firmly connected to the upper clamp.

[0010] The screw nut assembly is the main power source of the stretching mechanism. During the stretching test, the screw nut assembly starts, driving the crossbeam to move up and down, thereby driving the cable fixed on the upper clamp to move, and then stretching the cable fixed on the clamping mechanism to perform a stretching test on it.

[0011] Furthermore, the wind simulation mechanism includes a vibration component, an adjustment component and a transmission component. The vibration component is fastened to the frame, the adjustment component is snap-connected to the transmission component, and the adjustment component is slidably connected to the vibration component.

[0012] The vibration component is used to simulate the vibration generated by the bridge when it is affected by wind. The amplitude of the vibration is then adjusted through the adjustment component, and the vibration is transmitted to the cable through the transmission component, driving the cable to vibrate together, so that the cable is subjected to different vibrations, thereby ensuring the accuracy of the detection.

[0013] Furthermore, the vibration assembly includes a protective shell, a driving motor, a toggle wheel, a lever, a return spring and an impact hammer. The protective shell is tightly connected to the frame, the driving motor is tightly connected to the protective shell, the output end of the driving motor is transmission-connected to the toggle wheel, the toggle wheel is transmission-connected to the lever, the lever is slidingly connected to the protective shell, the lever is Z-shaped, one end of the return spring is tightly connected to the side wall of the lever, the other end of the return spring is tightly connected to the inner wall of the protective shell, the impact hammer is tightly connected to the lever, the impact hammer is slidingly connected to the protective shell, and a vibration rod is provided at the output end of the impact hammer, which is tightly connected to the frame.

[0014] The protective shell is fixed on the frame to provide a stable foundation for the vibration component. The driving motor is the main power source of the vibration component. When simulating the vibration caused by wind, the driving motor is started to drive the toggle wheel to rotate. During the rotation of the toggle wheel, it will intermittently touch the Z-shaped lever, thereby pushing the lever to move to one side. The reset spring is compressed, and the impact hammer retreats under the drive of the lever. When the toggle wheel is away from the lever, the lever moves forward under the action of the elastic force of the reset spring, thereby driving the impact hammer to hit the outer wall of the vibration rod, thereby driving the vibration rod to vibrate, and as the toggle wheel rotates, the impact hammer will continuously hit the vibration rod at a fixed frequency, thereby driving the vibration rod to vibrate continuously at a certain frequency, and by adjusting the speed of the driving motor, the frequency of the impact hammer hitting the vibration rod can be adjusted, thereby realizing automatic adjustment of the vibration frequency.

[0015] Furthermore, the vibrating rod is provided with a plurality of contraction sections from bottom to top, and the diameters of the contraction sections decrease successively.

[0016] The vibrating rod will vibrate at a certain frequency driven by the impact hammer, and as the height of the vibrating rod increases and the diameter of the contraction section gradually decreases, due to the relatively small mass and stiffness of the contraction section, a larger speed is formed and a larger displacement is produced at each turning moment back and forth during the vibration, and the amplitude will continue to increase. Therefore, the higher the position of the contraction section on the vibrating rod, the greater the amplitude. By adjusting the position of the transmission component on the vibrating rod, the vibration amplitude transmitted to the cable can be automatically adjusted.

[0017] Furthermore, the adjustment component includes a support frame, a screw module, a slider, a guide sleeve, and a sliding rod. The support frame is tightly connected to the frame, the screw module is tightly connected to the support frame, the screw module is transmission-connected to the slider, the guide sleeve is tightly connected to the slider, the sliding rod is slidingly connected to the guide sleeve, an adjustment spring is provided on the sliding rod, an electromagnet is provided at the end of the sliding rod away from the guide sleeve, and the electromagnet is transmission-connected to the transmission component.

[0018] The support frame is fixed on the frame to provide stable support for the adjustment component. The screw module is used to drive the slider to move up and down along the support frame. When the position of the transmission component needs to be adjusted, the electromagnet is started and adsorbed on the transmission component. The adjustment spring is compressed and the slide bar moves along the guide sleeve in the direction of the transmission component, so that the slider and the transmission component are connected together. Then the screw module is started to drive the slider to move, thereby driving the transmission component to move, so as to adjust the position of the transmission component on the vibration rod, thereby automatically adjusting the vibration amplitude transmitted to the cable, and realizing self-adjustment of the simulated vibration amplitude; and after the transmission component moves to a suitable position, the electromagnet is powered off, and under the action of the elastic force of the adjustment spring, the electromagnet will move away from the transmission component, thereby avoiding the vibration being transmitted to the electromagnet and increasing the service life of the electromagnet.

[0019] Furthermore, the transmission component includes a moving ring, a connecting rod, a resonance rod and a vibration-guide rod. The moving ring is sleeved on the vibration rod, one end of the connecting rod is tightly connected to the moving ring, and the other end of the connecting rod is slidably connected to the resonance rod. Movable sleeves are provided at both ends of the support frame, the resonance rod is sleeved in the movable sleeves, the vibration-guide rod is tightly connected to the resonance rod, and an electric clamp is provided at the end of the vibration-guide rod away from the resonance rod. A number of electric push rods are arranged circumferentially of the moving ring, and the output ends of the several electric push rods are abutted against the vibration rod. An attraction magnet is provided on the connecting rod, and the facing surfaces of the attraction magnet and the electromagnet are opposite poles.

[0020] Under the action of the magnetic force of the electromagnet, according to the principle of opposites attract, the electromagnet will be adsorbed on the attracting magnet, thereby connecting the slider in the adjusting component and the connecting rod in the transmission component. When the moving ring in the transmission component moves to a suitable position of the vibration rod under the drive of the adjusting component, the electric push rod starts and abuts against the outer wall of the vibration rod, fixing the moving ring on the outside of the vibration rod. The vibration is transmitted to the resonance rod through the connecting rod. The resonance rod continuously vibrates on the constraint of the movable sleeve and transmits the vibration to the electric clamp through the vibration guide rod. The electric clamp can automatically clamp on the cable to be detected, thereby transmitting the vibration to the cable and driving the cable to vibrate. At this time, the deformation of the cable is detected by the displacement sensor to determine the vibration resistance of the cable.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: by arranging a number of contraction sections with gradually decreasing diameters on the vibrating rod, since the mass and rigidity of the contraction sections are relatively small, a larger speed is formed and a larger displacement is produced at each turning moment back and forth during vibration, and the amplitude will continue to increase. Therefore, the higher the position of the contraction section on the vibrating rod, the larger the amplitude is. By adjusting the position of the transmission component on the vibrating rod, the automatic adjustment of the vibration amplitude transmitted to the cable can be achieved. By adjusting the rotational speed of the driving motor, the frequency of the impact hammer hitting the vibrating rod can be adjusted, thereby achieving automatic adjustment of the vibration frequency on the vibrating rod. The combination of the two realizes the automatic adjustment of the vibration frequency and amplitude transmitted to the cable, making the simulated wind vibration more realistic and improving the accuracy of detection.

[0022] The lead screw module is used to drive the slider to move up and down along the support frame. When it is necessary to adjust the position of the transmission component, the electromagnet is activated and adsorbed on the attracting magnet, thereby connecting the slider in the adjustment component to the connecting rod in the transmission component. The adjustment spring is compressed under force, and the sliding rod moves along the guide sleeve in the direction of the transmission component, so that the slider is connected to the transmission component. Then, the lead screw module is started to drive the slider to move, thereby driving the transmission component to move, so as to adjust the position of the transmission component on the vibrating rod, and thus automatically adjust the vibration amplitude transmitted to the cable, realizing the self-adjustment of the simulated vibration amplitude. And after the transmission component moves to a suitable position, the electromagnet is powered off. Under the elastic force of the adjustment spring, the electromagnet will move away from the transmission component, thereby avoiding transmitting vibration to the electromagnet and improving the service life of the electromagnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0024] Figure 1 is the overall structural schematic diagram of the present invention;

[0025] Figure 2 is the schematic diagram of the wind force simulation mechanism of the present invention;

[0026] Figure 3 is the orientation diagram of the wind force simulation mechanism;

[0027] Figure 4 is the schematic diagram of the vibration component;

[0028] Figure 5 is Figure 4 the enlarged view of the partial view A of

[0029] Figure 6 is the schematic diagram of the adjustment component;

[0030] Figure 7 is Figure 6 the enlarged view of the partial view B of

[0031] In the figure: 1-frame, 2-clamping mechanism, 21-upper clamp, 22-lower clamp, 3-stretching mechanism, 31-crossbeam, 32-screw nut assembly, 4-wind simulation mechanism, 41-vibration assembly, 411-protective shell, 412-drive motor, 413-push wheel, 414-push rod, 415-reset spring, 416-impact hammer, 417-vibration rod, 42-adjustment assembly, 421-support frame, 4211-movable sleeve, 422-screw module, 423-slider, 424-guide sleeve, 425-slide rod, 426-adjustment spring, 427-electromagnet, 43-transmission assembly, 431-movable ring, 432-connecting rod, 433-resonance rod, 434-vibration guide rod, 435-electric clamp, 436-electric push rod, 437-attracting magnet. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1-7 , the present invention provides a technical solution:

[0034] The bridge tensile resonance detection device includes a frame 1, a clamping mechanism 2, a stretching mechanism 3, and a wind simulation mechanism 4. The clamping mechanism 2 is tightly connected to the frame 1, the stretching mechanism 3 is tightly connected to the clamping mechanism 2, and the wind simulation mechanism 4 is tightly connected to the frame 1. The clamping mechanism 2 is used to fix the cable, and the stretching mechanism 3 is used to perform tensile detection on the cable.

[0035] The frame 1 is used to provide stable support for each mechanism. When the bridge deck is blown by wind, it will shake, thereby causing the bridge cables to vibrate. This requires the bridge cables to have certain vibration and tensile resistance to ensure the overall safety of the bridge. Therefore, the bridge cables must be subjected to tensile resonance testing, and the vibration caused by wind must be simulated to fit the actual use environment and ensure the accuracy of the test. During the test, the cables are first cut into suitable lengths, and then the cables are fixed to the test device through the clamping mechanism 2, and the stretching mechanism 3 is started to drive the clamping mechanism 2 to move, thereby performing a tensile test on the cables. When resonance testing is required, the wind simulation mechanism 4 is started to simulate the vibration caused by the wind, and the vibration is transmitted to the cables. The deformation of the cables during vibration is detected to determine the vibration resistance of the cables.

[0036] The clamping mechanism 2 includes an upper jaw 21 and a lower jaw 22. The upper jaw 21 is fixedly connected to the stretching mechanism 3, and the lower jaw 22 is fixedly connected to the frame 1. A load sensor and a displacement sensor are provided on the upper jaw 21. The load sensor is used to measure the force applied to the cable, and the displacement sensor is used to measure the deformation of the cable.

[0037] The clamping mechanism 2 fixes the cable at the detection position through the upper jaw 21 and the lower jaw 22, so that the stretching mechanism 3 drives the upper jaw 21 to move, thereby stretching the cable, and the load sensor and displacement sensor integrated on the upper jaw 21 are used to detect the magnitude of the tensile force and the deformation amount suffered by the cable during stretching. Moreover, the load sensor and the displacement sensor are externally connected to a detection system, and the measured data can be analyzed to obtain accurate data.

[0038] The stretching mechanism 3 includes a cross beam 31 and a lead screw nut assembly 32. The lead screw nut assembly 32 is fixedly connected to the frame 1, the lead screw nut assembly 32 is in transmission connection with the cross beam 31, the cross beam 31 is slidably connected to the frame 1, and the cross beam 31 is fixedly connected to the upper jaw 21.

[0039] The lead screw nut assembly 32 is the main power source of the stretching mechanism 3. During stretching detection, the lead screw nut assembly 32 starts to drive the cross beam 31 to move up and down, thereby driving the cable fixed on the upper jaw 21 to move, and then stretching the cable fixed on the clamping mechanism 2 for stretching detection.

[0040] The wind force simulation mechanism 4 includes a vibration component 41, an adjustment component 42 and a transmission component 43. The vibration component 41 is fixedly connected to the frame 1, the adjustment component 42 is snap-connected to the transmission component 43, and the adjustment component 42 is slidably connected to the vibration component 41.

[0041] The vibration component 41 is used to simulate the vibration generated by the bridge under the action of wind force, then the amplitude of the vibration is adjusted through the adjustment component 42, and the vibration is transmitted to the cable through the transmission component 43 to drive the cable to vibrate together, so that the cable is subjected to different vibrations, thereby ensuring the accuracy of the detection.

[0042] The vibration assembly 41 includes a protective shell 411, a driving motor 412, a toggle wheel 413, a lever 414, a return spring 415 and a hammer 416. The protective shell 411 is tightly connected to the frame 1, the driving motor 412 is tightly connected to the protective shell 411, the output end of the driving motor 412 is transmission-connected to the toggle wheel 413, the toggle wheel 413 is transmission-connected to the lever 414, the lever 414 is slidingly connected to the protective shell 411, the lever 414 is Z-shaped, one end of the return spring 415 is tightly connected to the side wall of the lever 414, the other end of the return spring 415 is tightly connected to the inner wall of the protective shell 411, the hammer 416 is tightly connected to the lever 414, the hammer 416 is slidingly connected to the protective shell 411, and the output end of the hammer 416 is provided with a vibration rod 417, and the vibration rod 417 is tightly connected to the frame 1.

[0043] The protective shell 411 is fixed on the frame 1 to provide a stable foundation for the vibration component 41. The driving motor 412 is the main power source of the vibration component 41. When simulating the vibration caused by wind, the driving motor 412 is started to drive the toggle wheel 413 to rotate. During the rotation process, the toggle wheel 413 will intermittently touch the Z-shaped lever 414, thereby pushing the lever 414 to move to one side, and the reset spring 415 is compressed. The impact hammer 416 retreats under the drive of the lever 414. When the toggle wheel 413 is away from the lever, the reset spring 415 is compressed. Under the action of the elastic force of the spring 415, the lever 414 moves forward, thereby driving the impact hammer 416 to hit the outer wall of the vibration rod 417, thereby driving the vibration rod 417 to vibrate, and as the driving wheel 413 rotates, the impact hammer 416 will continuously hit the vibration rod 417 at a fixed frequency, thereby driving the vibration rod 417 to continuously vibrate at a certain frequency, and by adjusting the rotation speed of the driving motor 412, the frequency of the impact hammer 416 hitting the vibration rod 417 can be adjusted, thereby realizing automatic adjustment of the vibration frequency.

[0044] The vibrating rod 417 is provided with a plurality of contraction sections from bottom to top, and the diameters of the contraction sections decrease successively.

[0045] The vibration rod 417 will vibrate at a certain frequency driven by the impact hammer 416, and as the height of the vibration rod 417 increases and the diameter of the contraction section gradually decreases, since the mass and stiffness of the contraction section are relatively small, a larger speed is formed and a larger displacement is produced at each turning moment back and forth during the vibration, and the amplitude will continue to increase. Therefore, the higher the position of the contraction section on the vibration rod 417, the greater the amplitude. By adjusting the position of the transmission component 43 on the vibration rod 417, the automatic adjustment of the vibration amplitude transmitted to the cable can be achieved.

[0046] The adjusting component 42 includes a support frame 421, a lead screw module 422, a slider 423, a guide sleeve 424, and a slide rod 425. The support frame 421 is fixedly connected to the frame 1. The lead screw module 422 is fixedly connected to the support frame 421. The lead screw module 422 is drivingly connected to the slider 423. The guide sleeve 424 is fixedly connected to the slider 423. The slide rod 425 is slidably connected to the guide sleeve 424. An adjusting spring 426 is sleeved on the slide rod 425. An electromagnet 427 is provided at one end of the slide rod 425 away from the guide sleeve 424. The electromagnet 427 is drivingly connected to the transmission component 43.

[0047] The support frame 421 is fixed on the frame 1 to provide stable support for the adjusting component 42. The lead screw module 422 is used to drive the slider 423 to move up and down along the support frame 421. When the position of the transmission component 43 needs to be adjusted, the electromagnet 427 is activated and adsorbed on the transmission component 43. The adjusting spring 426 is compressed under force. The slide rod 425 moves along the guide sleeve 424 in the direction towards the transmission component 43, so that the slider 423 is connected to the transmission component 43. Then, the lead screw module 422 is started to drive the slider 423 to move, thereby driving the transmission component 43 to move, so as to adjust the position of the transmission component 43 on the vibrating rod 417, and thus automatically adjust the vibration amplitude transmitted to the cable, realizing the self-adjustment of the simulated vibration amplitude. And after the transmission component 43 moves to a suitable position, the electromagnet 427 is powered off. Under the elastic force of the adjusting spring 426, the electromagnet 427 will move away from the transmission component 43, thereby avoiding transmitting vibration to the electromagnet 427 and improving the service life of the electromagnet 427.

[0048] The transmission component 43 includes a moving ring 431, a connecting rod 432, a resonance rod 433, and a vibration guiding rod 434. The moving ring 431 is sleeved on the vibrating rod 417. One end of the connecting rod 432 is fixedly connected to the moving ring 431. The other end of the connecting rod 432 is slidably connected to the resonance rod 433. Movable sleeves 4211 are provided at both ends of the support frame 421. The resonance rod 433 is sleeved in the movable sleeves 4211. The vibration guiding rod 434 is fixedly connected to the resonance rod 433. An electric gripper 435 is provided at one end of the vibration guiding rod 434 away from the resonance rod 433. A plurality of electric push rods 436 are circumferentially arranged on the moving ring 431. The output ends of the plurality of electric push rods 436 abut against the vibrating rod 417. An attracting magnet 437 is provided on the connecting rod 432. The opposite surfaces of the attracting magnet 437 and the electromagnet 427 are opposite magnetic poles.

[0049] Under the action of the magnetic force of the electromagnet 427, according to the principle of attraction between opposite poles, the electromagnet 427 will be attracted to the attracting magnet 437, thereby connecting the slider 423 in the adjusting assembly 42 with the connecting rod 432 in the transmission assembly 43. When the moving ring 431 in the transmission assembly 43 moves to a suitable position of the vibrating rod 417 driven by the adjusting assembly 42, the electric push rod 436 is activated and abuts against the outer wall of the vibrating rod 417 to fix the moving ring 431 outside the vibrating rod 417. The vibration is transmitted to the resonance rod 433 through the connecting rod 432. The resonance rod 433 continuously vibrates under the constraint of the movable sleeve 4211 and transmits the vibration to the electric gripper 435 through the vibration guide rod 434. The electric gripper 435 can automatically clamp on the cable to be detected, thereby transmitting the vibration to the cable and driving the cable to vibrate. At this time, by detecting the deformation amount of the cable with a displacement sensor, the anti-vibration performance of the cable can be judged.

[0050] The working principle of the present invention is as follows: first, the cable is fixed to the detection device through the clamping mechanism 2, and the stretching mechanism 3 is started to drive the clamping mechanism 2 to move, so as to perform a stretching test on the cable. When resonance detection is required, the wind simulation mechanism 4 is started to simulate the vibration caused by the wind, and the vibration is transmitted to the cable. The deformation of the cable during vibration is detected, and the vibration resistance of the cable can be determined. When simulating the vibration caused by wind, the driving motor 412 is started to drive the toggle wheel 413 to rotate. During the rotation process, the toggle wheel 413 will intermittently touch the Z-shaped toggle lever 414, thereby pushing The lever 414 moves to one side, the return spring 415 is compressed, and the impact hammer 416 moves back under the drive of the lever 414. When the toggle wheel 413 is away from the lever, the lever 414 moves forward under the action of the elastic force of the return spring 415, thereby driving the impact hammer 416 to hit the outer wall of the vibrating rod 417, thereby driving the vibrating rod 417 to vibrate, and as the toggle wheel 413 rotates, the impact hammer 416 will continuously hit the vibrating rod 417 at a fixed frequency, thereby driving the vibrating rod 417 to continuously vibrate at a certain frequency, and by adjusting the speed of the driving motor 412, the vibration of the vibrating rod 417 can be controlled. The frequency at which the impact hammer 416 hits the vibration rod 417 can be adjusted to achieve automatic adjustment of the vibration frequency. The higher the position of the contraction section on the vibration rod 417, the greater the amplitude. By adjusting the position of the transmission component 43 on the vibration rod 417, the vibration amplitude transmitted to the cable can be automatically adjusted. Under the action of the magnetic force of the electromagnet 427, the electromagnet 427 will be adsorbed on the attraction magnet 437, thereby connecting the slider 423 in the adjustment component 42 with the connecting rod 432 in the transmission component 43. When the moving ring 431 in the transmission component 43 moves down driven by the adjustment component 42, the moving ring 431 in the transmission component 43 moves down driven by the adjustment component 42. After moving to the appropriate position of the vibration rod 417, the electric push rod 436 is started and abuts against the outer wall of the vibration rod 417, fixing the movable ring 431 on the outside of the vibration rod 417, and the vibration is transmitted to the resonance rod 433 through the connecting rod 432. The resonance rod 433 continuously vibrates under the constraint of the movable sleeve 4211, and transmits the vibration to the electric clamp 435 through the vibration guide rod 434. The electric clamp 435 can automatically clamp on the cable to be tested, thereby transmitting the vibration to the cable and driving the cable to vibrate. At this time, the deformation of the cable is detected by the displacement sensor to determine the vibration resistance of the cable.

[0051] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0052] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bridge cable tensile resonance detection device with a wind force simulation function, characterized in that: The bridge tensile resonance detection device comprises a frame (1), a clamping mechanism (2), a stretching mechanism (3), and a wind force simulation mechanism (4); the clamping mechanism (2) is tightly connected to the frame (1); the stretching mechanism (3) is tightly connected to the clamping mechanism (2); the wind force simulation mechanism (4) is tightly connected to the frame (1); the clamping mechanism (2) is used to fix the cable; and the stretching mechanism (3) is used to perform a tensile test on the cable. The wind force simulation mechanism (4) comprises a vibration component (41), an adjustment component (42) and a transmission component (43); the vibration component (41) is fastened to the frame (1), the adjustment component (42) is snap-fitted to the transmission component (43), and the adjustment component (42) is slidably connected to the vibration component (41); The vibration assembly (41) comprises a protective shell (411), a drive motor (412), a toggle wheel (413), a lever (414), a return spring (415) and a striking hammer (416); the protective shell (411) is firmly connected to the frame (1); the drive motor (412) is firmly connected to the protective shell (411); the output end of the drive motor (412) is transmission-connected to the toggle wheel (413); the toggle wheel (413) is transmission-connected to the lever (414); the lever (414) is transmission-connected to the The protective shell (411) is slidably connected, the lever (414) is Z-shaped, one end of the return spring (415) is firmly connected to the side wall of the lever (414), the other end of the return spring (415) is firmly connected to the inner wall of the protective shell (411), the impact hammer (416) is firmly connected to the lever (414), the impact hammer (416) is slidably connected to the protective shell (411), a vibration rod (417) is provided at the output end of the impact hammer (416), and the vibration rod (417) is firmly connected to the frame (1); The vibrating rod (417) is provided with a plurality of contraction sections from bottom to top, and the diameters of the contraction sections decrease sequentially; The adjustment component (42) comprises a support frame (421), a screw module (422), a slider (423), a guide sleeve (424), and a slide rod (425); the support frame (421) is fixedly connected to the frame (1); the screw module (422) is fixedly connected to the support frame (421); the screw module (422) is transmission-connected to the slider (423); the guide sleeve (424) is fixedly connected to the slider (423); the slide rod (425) is slidably connected to the guide sleeve (424); an adjustment spring (426) is sleeved on the slide rod (425); an electromagnet (427) is provided at one end of the slide rod (425) away from the guide sleeve (424); and the electromagnet (427) is transmission-connected to the transmission component (43); The transfer component (43) includes a moving ring (431), a connecting rod (432), a resonance rod (433) and a vibration guiding rod (434). The moving ring (431) is sleeved on the vibrating rod (417). One end of the connecting rod (432) is fixedly connected to the moving ring (431), and the other end of the connecting rod (432) is slidably connected to the resonance rod (433). Both ends of the support frame (421) are provided with movable sleeves (4211), and the resonance rod (433) is sleeved in the movable sleeves (4211). The vibration guiding rod (434) is fixedly connected to the resonance rod (433), and an electric gripper (435) is provided at one end of the vibration guiding rod (434) away from the resonance rod (433). A plurality of electric push rods (436) are circumferentially arranged on the moving ring (431), and the output ends of the plurality of electric push rods (436) are abutted against the vibrating rod (417). An attracting magnet (437) is provided on the connecting rod (432), and the facing surfaces of the attracting magnet (437) and the electromagnet (427) are opposite magnetic poles.

2. The tensile resonance detection device for bridge cables with a wind force simulation function according to claim 1, characterized in that: The clamping mechanism (2) includes an upper gripper (21) and a lower gripper (22). The upper gripper (21) is fixedly connected to the stretching mechanism (3), and the lower gripper (22) is fixedly connected to the machine frame (1). A load sensor and a displacement sensor are provided on the upper gripper (21). The load sensor is used to measure the force applied to the cable, and the displacement sensor is used to measure the deformation of the cable.

3. The tensile resonance detection device for bridge cables with a wind force simulation function according to claim 2, characterized in that: The stretching mechanism (3) includes a cross beam (31) and a lead screw nut assembly (32). The lead screw nut assembly (32) is fixedly connected to the machine frame (1), and the lead screw nut assembly (32) is in transmission connection with the cross beam (31). The cross beam (31) is slidably connected to the machine frame (1), and the cross beam (31) is fixedly connected to the upper gripper (21).

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