Measuring positioning device and method for high-precision installation of cable saddle of suspension bridge based on radio wave ranging

Abstract

The application relates to the technical field of bridge construction equipment, in particular to a measuring and positioning device and method for high-precision installation of a suspension bridge cable saddle based on radio wave ranging, which comprises a moving group sleeved outside the cable saddle, a clamping device arranged in the moving group, an adjusting mechanism arranged at the right side of the moving group and two guide rails. The measuring and positioning device and method for high-precision installation of the suspension bridge cable saddle based on the radio wave ranging drive the frame tooth in the limiting part to overturn, and in the process of clamping the cable saddle on both sides in the radial direction through the limiting plate, the circular rod and the guide groove, the linkage bending plate cooperates with the first spring to provide an axial constraint force for the cable saddle, so that the position adjustment of the cable saddle is realized artificially, the error of manual centering is eliminated, and the operation strength of manual repeated correction in traditional hoisting is reduced.

Description

Technical Field

[0001] This invention relates to the field of bridge construction equipment technology, and more specifically, to a measurement and positioning device and method for high-precision installation of suspension bridge cable saddles based on radio wave ranging. Background Technology

[0002] As the core force-transmitting component supporting the main cable, the installation accuracy of the suspension bridge cable saddle must be strictly controlled at the millimeter level. This directly affects the smoothness of the main cable alignment, the uniformity of stress, and the safety of the entire bridge structure. High-precision installation serves as the benchmark for subsequent main cable erection. Errors will amplify with each span. Therefore, it is necessary to use precision measuring equipment to conduct real-time dynamic monitoring and fine adjustments in complex construction environments to ensure that the design intent is accurately realized. This is an indispensable technical support for achieving millimeter-level installation accuracy.

[0003] Patent application number CN202411881531.6 discloses a machine vision-based system and method for rapid synchronous leveling of the flatness of suspension bridge cable saddle grids. The leveling method includes: determining the number of leveling points and setting up a leveling fixture at each leveling point; setting up a visual monitoring camera and a target to ensure that the target and the visual monitoring camera are on the same plane; determining the target height value of each leveling fixture; obtaining the initial height value of each leveling fixture and calculating the leveling rate of each leveling fixture; synchronously leveling the height of each leveling point according to the leveling rate of each leveling fixture; and achieving rapid leveling through real-time dynamic monitoring and control of the leveling fixtures.

[0004] However, existing cable saddle positioning and installation equipment and its clamping system rely on manual tapping or auxiliary instruments to adjust the radial and axial positions respectively, which not only introduces centering errors, but also consumes more than half of the installation cycle due to repeated high-altitude corrections. Secondly, the fine-tuning and fixing functions are disconnected. After the crane is roughly positioned, manual intervention is required for fine-tuning and additional anti-slip devices are installed, which makes the cable saddle prone to displacement. In addition, the monitoring of the entire process relies on manual measurement, which not only prolongs the high-altitude and high-risk operation time, but also increases the error of human reading.

[0005] In view of this, we propose a measurement and positioning device and method for high-precision installation of suspension bridge cable saddles based on radio wave ranging. Summary of the Invention

[0006] The purpose of this invention is to provide a measurement and positioning device and method for high-precision installation of suspension bridge cable saddles based on radio wave ranging. During the process of radially clamping both sides of the cable saddle by a limiting plate, a linkage bending plate provides axial constraint force on the cable saddle, thereby replacing manual adjustment of the cable saddle position and solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A high-precision measurement and positioning device for the installation of suspension bridge cable saddles based on radio wave ranging includes a movable group sleeved on the outside of the cable saddle, a clamping device set inside the movable group, an adjustment mechanism set on the right side of the movable group, and two guide rails.

[0009] The movable group includes two symmetrically arranged square frames, and two guide grooves are opened on the top surface of the square frames;

[0010] The clamping device includes a first motor, a bidirectional lead screw driven by the first motor, a limiting part disposed at the end of the bidirectional lead screw, a bending plate disposed on the top surface of the frame, and a pulley that moves with the bending plate. The limiting part includes a sliding box, frame teeth sleeved on the outside of the bidirectional lead screw, a limiting plate rotating in the sliding box, shaft teeth sleeved on the end of the limiting plate, and a round rod sliding on the top surface of the sliding box. The bottom surface of the bending plate is provided with a bottom sliding groove. The top end of the round rod passes through the guide groove and extends into the bottom sliding groove. The end of the bidirectional lead screw passes through the sliding box and rotates on the inner wall of the bottom of the frame. The frame teeth are threadedly connected to the bidirectional lead screw and slidably connected to the inside of the sliding box.

[0011] The above-mentioned configuration involves a first motor driving a bidirectional lead screw to move the frame teeth to the inner wall of the sliding box, which in turn moves the sliding box and engages with the shaft teeth to drive the limiting plate to flip. As the limiting plate moves with the sliding box, it clamps the cable saddle. At this time, the round rod moves along the guide groove, causing the bending plate to move inward and the pulley to abut against the outer wall of the cable saddle.

[0012] The adjustment mechanism includes a second motor, an outer lead screw driven by the second motor, a movable plate sleeved on the outer lead screw, and a pair of self-locking parts;

[0013] After the cable saddle is moved to the designated position by the crane, the second motor drives the outer screw to move the moving plate, which in turn drives the moving assembly to fine-tune the installation position of the cable saddle.

[0014] In the technical solution of the present invention, the moving assembly further includes a connecting frame fixedly connected to the right end of the two square frames by bolts, two sliding rods welded and fixed to the outer wall of the connecting frame, a concave frame snapped and fixed to the right end of the sliding rod, a rangefinder fixedly connected to the center position of the outer wall of the square frame by bolts, and a walking wheel fixedly connected to the bottom left side of the square frame by bolts. The top surface of the square frame is provided with frame surface sliding grooves on both the left and right sides of the guide groove.

[0015] This setup uses a rangefinder to emit radio waves to monitor and provide real-time feedback on the precise position of the cable saddle. It works in conjunction with two guide rails, pre-laid on either side of the cable saddle's designed installation location on the top of the pier based on precise measurements, forming a positioning reference system. This system initially limits the axial movement freedom of the cable saddle during hoisting, effectively guiding it smoothly along a pre-set path towards the target position. This lays a solid foundation for subsequent fine-tuning operations, ultimately ensuring high-precision installation of the cable saddle.

[0016] In the technical solution of the present invention, the first motor is fixedly connected to the top surface of the frame by bolts, and a worm gear is coaxially connected to the output shaft of the first motor. The two ends of the bidirectional lead screw are rotatably connected to the inner walls of the left and right ends of the frame, and a worm wheel that meshes with the worm gear is snapped and fixed at the center of the outer wall of the bidirectional lead screw.

[0017] In the technical solution of the present invention, the sliding box is slidably connected to the inside of the frame, a protruding strip is welded and fixed on the inner wall of the sliding box, a box surface groove is opened on the top surface of the sliding box, and a box surface through groove is opened on the outer wall of the sliding box.

[0018] In the technical solution of the present invention, the limiting plate is rotatably connected to the inside of the sliding box through the convex shaft at the end, the shaft tooth is snapped and fixed to the outside of the convex shaft at the end of the limiting plate and meshes with the frame tooth, and the bottom end of the round rod is slidably connected to the inside of the sliding groove on the box surface.

[0019] In the technical solution of the present invention, a slider that is slidably connected to the inside of the frame groove is welded and fixed to the bottom surface of the bending plate, and a telescopic rod is snapped and fixed between the bending plate and the pulley. A first spring is sleeved on the outside of the telescopic rod, and the two ends of the first spring are respectively welded and fixed to the outer wall of the bending plate and the outer wall of the pulley's outer support.

[0020] The above setup controls the start of two first motors, thereby changing the position of the limiting part and the two upper bending plates, completely replacing manual adjustment of the cable saddle position and eliminating errors caused by manual alignment.

[0021] In the technical solution of the present invention, the second motor is fixedly connected to the outer wall of the right end of the fixed frame by bolts, the external lead screw is coaxially connected to the output shaft of the second motor, the movable plate is slidably connected to the inside of the fixed frame and threadedly connected to the external lead screw, the size of the movable plate is adapted to the internal size of the concave frame, and two grooves are provided on the bottom surface of the movable plate.

[0022] This configuration allows the limiting block to move upwards under the force of the second spring at the bottom after the moving plate moves away from the self-locking part. This movement drives the connecting rod to change the position of the locking plate, thereby restricting the self-locking wheel at the bottom of the fixed frame. Subsequently, the moving plate abuts against the concave frame, and the sliding rod drives the movement of one pair of frames. Since the cable saddle is pre-locked inside the moving assembly by the clamping device, the movement of the moving assembly can precisely drive the cable saddle to make fine adjustments. After the cable saddle slowly moves to the installation position, the second motor is turned off, and the crane continues to lower the cable saddle, accurately placing it in the installation position.

[0023] In the technical solution of the present invention, the self-locking part includes a square box that is snapped and fixed to the bottom surface inside the fixed frame, a limiting block that is slidably connected to the inside of the square box, a connecting rod that is snapped and fixed to the bottom surface of the limiting block, a second spring sleeved on the outside of the connecting rod, a self-locking wheel that is fixedly connected to the bottom surface of the fixed frame by bolts, and a locking plate that is rotatably connected to the bracket on the outside of the self-locking wheel.

[0024] In the technical solution of the present invention, a through groove is provided on the top surface of the square box, the longitudinal section of the limiting block is a right trapezoid, the upper and lower ends of the second spring are respectively welded and fixed to the inner bottom surface of the fixed frame and the bottom surface of the limiting block, and the bottom end of the connecting rod is rotatably connected to the end of the locking plate.

[0025] The above configuration enables the self-locking mechanism of the self-locking part to be triggered before adjusting the cable saddle displacement, thereby fixing the adjustment mechanism, ensuring the stability of the cable saddle movement, and ensuring the accuracy of the cable saddle installation position.

[0026] On the other hand, the present invention also provides a measurement and positioning method for high-precision installation of suspension bridge cable saddles based on radio wave ranging, which, using the above-mentioned measurement and positioning device for high-precision installation of suspension bridge cable saddles based on radio wave ranging, includes the following steps:

[0027] S1. Operators use a crane to transport the cable saddle placed under the pier to the top of the suspension bridge pier, and transport the pier from the left side of the moving group to a pair of frames.

[0028] S2. Start the first motor in the clamping device to drive the worm gear to rotate and engage the worm wheel to drive the bidirectional lead screw to rotate inside the frame;

[0029] S3. At this time, the bidirectional lead screw drives the frame teeth in the limiting parts at both ends to move to the inner wall of the sliding box and then drives the sliding box to move. During the process of the frame teeth moving to the inner wall, the meshing shaft teeth drive the limiting plate to rotate 90°.

[0030] S4. Subsequently, the limiting plate moves with the sliding box and clamps the cable saddle between two pairs of frames. At the same time, the round rod moves along the guide groove, and the end pushes the bottom groove of the plate, causing the bending plate to move inward, so that the pulley abuts against the outer wall of the cable saddle and squeezes the first spring to compress the first spring, thereby fixing the cable saddle in the center position inside a pair of frames.

[0031] S5. Next, the cable saddle, along with the entire positioning device, is moved along the guide rail to the installation position using the bottom crane. Meanwhile, the operator at the top of the pier observes the position information of the cable saddle in real time using the rangefinder of the moving group.

[0032] S6. After the cable saddle is moved to the left side of the installation position, the operator sends a signal to the crane operator to stop the movement of the crane boom. Then, the second motor in the adjustment mechanism is started to drive the outer screw to rotate, which in turn moves the moving plate towards the concave frame.

[0033] S7. At this time, after the moving plate leaves the top of the self-locking part, the limiting block moves upward under the elastic force of the second spring at the bottom, which drives the connecting rod to change the position of the locking plate, thereby restricting the self-locking wheel at the bottom of the fixed frame.

[0034] S8. Subsequently, the moving plate contacts the concave frame, and the sliding rod drives the movement of the frame position. After the cable saddle slowly moves to the installation position, the second motor is turned off, and the crane continues to be operated to lower the cable saddle and accurately place the cable saddle in the installation position.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] 1. The measurement and positioning device and method for high-precision installation of suspension bridge cable saddles based on radio wave ranging, wherein the frame teeth in the limiting part drive the limiting plate to flip, and during the process of radially clamping the two sides of the cable saddle through the limiting plate, the round rod and guide groove, together with the bending plate and the first spring, provide axial constraint force on the cable saddle, thereby replacing manual adjustment of the cable saddle position, eliminating the error of manual centering, and reducing the workload of repeated manual correction in traditional hoisting.

[0037] 2. This measurement and positioning device and method for high-precision installation of suspension bridge cable saddles based on radio wave ranging uses a second motor to drive an external lead screw to push a moving plate fine-tuning slide bar, thereby causing the overall displacement of the frame. At the same time, the displacement of the moving plate triggers a self-locking part to fix the adjustment mechanism, ensuring the stability of the cable saddle movement and ensuring the accuracy of the cable saddle installation position. In conjunction with the real-time feedback from the rangefinder, it improves the positioning accuracy and reduces the time operators spend working at heights. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 This is a partial cross-sectional schematic diagram of the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of the moving group in this invention;

[0041] Figure 4 This is a schematic diagram of the clamping device in this invention;

[0042] Figure 5 This is a cross-sectional schematic diagram of the limiting part in this invention;

[0043] Figure 6This is a schematic diagram of the structure of the bent plate in this invention;

[0044] Figure 7 This is a cross-sectional schematic diagram of the adjusting mechanism in this invention;

[0045] Figure 8 This is a cross-sectional schematic diagram of the self-locking part in this invention;

[0046] Explanation of reference numerals in the attached figures:

[0047] 100. Moving assembly; 110. Frame; 111. Guide groove; 112. Frame slide groove; 120. Connecting frame; 130. Slide rod; 140. Concave frame; 150. Rangefinder; 160. Wheels;

[0048] 200. Clamping device; 210. First motor; 220. Worm gear; 230. Worm wheel; 240. Double-acting lead screw; 250. Limiting part; 251. Sliding box; 2510. Box surface groove; 2511. Box surface through groove; 252. Raised strip; 253. Frame tooth; 254. Limiting plate; 255. Shaft tooth; 256. Round rod; 260. Bending plate; 261. Plate bottom groove; 262. Slider; 270. Telescopic rod; 280. First spring; 290. Pulley;

[0049] 300. Adjustment mechanism; 310. Fixed frame; 320. Second motor; 330. External lead screw; 340. Moving plate; 350. Self-locking part; 351. Square box; 3510. Box top through slot; 352. Limiting block; 353. Connecting rod; 354. Second spring; 355. Self-locking wheel; 356. Locking plate;

[0050] 400. Guide rail. Detailed Implementation

[0051] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0052] Please see Figures 1-3 As shown, this embodiment provides the following technical solution:

[0053] A high-precision measurement and positioning device for the installation of suspension bridge cable saddles based on radio wave ranging includes a movable group 100 sleeved outside the cable saddle, a clamping device 200 disposed inside the movable group 100, an adjustment mechanism 300 disposed on the right side of the movable group 100, and two guide rails 400.

[0054] Specifically, the movable group 100 includes two symmetrically arranged square frames 110, and two guide grooves 111 are provided on the top surface of the square frames 110.

[0055] Furthermore, the mobile assembly 100 also includes a connecting frame 120 fixedly connected to the right end of the two square frames 110 by bolts, two slide rods 130 welded and fixed to the outer wall of the connecting frame 120, a concave frame 140 snapped and fixed to the right end of the slide rod 130, a rangefinder 150 fixedly connected to the center position of the outer wall of the square frame 110 by bolts, and a walking wheel 160 fixedly connected to the bottom left side of the square frame 110 by bolts. The top surface of the square frame 110 has frame surface slide grooves 112 on both the left and right sides of the guide groove 111.

[0056] Furthermore, the frame 110 provides a space for the clamping device 200 to be placed and slid, the guide groove 111 allows the internal structure of the clamping device 200 to move toward the saddle, the frame surface groove 112 restricts the movement range of the internal structure of the clamping device 200, the connecting frame 120 connects one pair of frames 110 together, and through the traveling wheels 160 at the bottom of the frame 110 and the two guide rails 400, ensures the stability of the path when the moving group 100 moves, the slide bar 130 connects the connecting frame 120 to the concave frame 140, and the rangefinder 150 transmits the position of the saddle in real time via radio waves. This setup uses a rangefinder 150 to transmit radio waves, which monitors and provides real-time feedback on the precise position of the cable saddle. Together with two guide rails 400, which are pre-laid on both sides of the designed installation position of the cable saddle on the top of the pier based on precise measurement results, it forms a positioning reference system. This system can initially limit the axial movement freedom of the cable saddle during hoisting, effectively guiding the cable saddle to smoothly approach the target position along the preset path, thus laying a solid foundation for subsequent fine-tuning operations and ultimately ensuring the high precision of the cable saddle installation position.

[0057] Please see Figures 1-6 As shown, in this embodiment, the clamping device 200 includes a first motor 210, a bidirectional lead screw 240 driven by the first motor 210, a limiting part 250 disposed at the end of the bidirectional lead screw 240, a bending plate 260 disposed on the top surface of the frame 110, and a pulley 290 that moves with the bending plate 260. The limiting part 250 includes a sliding box 251, frame teeth 253 sleeved on the bidirectional lead screw 240, and a limiting plate 254 that rotates within the sliding box 251. The shaft tooth 255 is sleeved on the end of the convex shaft of the limiting plate 254 and the round rod 256 slides on the top surface of the sliding box 251. The bottom surface of the bent plate 260 is provided with a bottom sliding groove 261. The top end of the round rod 256 passes through the guide groove 111 and extends into the bottom sliding groove 261. The end of the bidirectional lead screw 240 passes through the sliding box 251 and rotates on the inner wall of the bottom of the square frame 110. The frame tooth 253 is threadedly connected to the bidirectional lead screw 240 and slidably connected inside the sliding box 251.

[0058] Specifically, the first motor 210 drives the bidirectional lead screw 240 to move the frame tooth 253 to the inner wall of the sliding box 251, and then drives the sliding box 251 to move. It also engages the shaft tooth 255 to drive the limiting plate 254 to flip. The limiting plate 254 completes the clamping of the cable saddle during the movement of the sliding box 251. At this time, the round rod 256 moves along the guide groove 111, driving the bending plate 260 to move inward, and the pulley 290 abuts against the outer wall of the cable saddle.

[0059] Furthermore, the first motor 210 is fixedly connected to the top surface of the frame 110 by bolts. A worm gear 220 is coaxially connected to the output shaft of the first motor 210. The two ends of the bidirectional lead screw 240 are rotatably connected to the inner walls of the left and right ends of the frame 110, and a worm wheel 230 that meshes with the worm gear 220 is snapped and fixed at the center of the outer wall of the bidirectional lead screw 240.

[0060] Furthermore, the sliding box 251 is slidably connected to the inside of the frame 110. A protruding strip 252 is welded and fixed on the inner wall of the sliding box 251. A box surface groove 2510 is opened on the top surface of the sliding box 251, and a box surface through groove 2511 that runs through the inside and outside is opened on the outer wall of the sliding box 251.

[0061] Furthermore, the limiting plate 254 is rotatably connected to the inside of the sliding box 251 via the convex shaft at its end, the shaft tooth 255 is snapped and fixed to the outside of the convex shaft at the end of the limiting plate 254 and meshes with the frame tooth 253, and the bottom end of the round rod 256 is slidably connected to the inside of the box surface groove 2510.

[0062] Furthermore, a slider 262 is welded and fixed to the bottom surface of the bent plate 260 and is slidably connected to the inside of the frame groove 112. A telescopic rod 270 is snapped and fixed between the bent plate 260 and the pulley 290. A first spring 280 is sleeved on the outside of the telescopic rod 270. The two ends of the first spring 280 are welded and fixed to the outer wall of the bent plate 260 and the outer wall of the outer bracket of the pulley 290, respectively.

[0063] Further, the first motor 210 in the clamping device 200 is activated, driving the worm gear 220 to rotate and engaging the worm wheel 230 to drive the bidirectional lead screw 240 to rotate inside the square frame 110. At this time, the bidirectional lead screw 240 drives the frame teeth 253 in the limiting parts 250 at both ends to move to the inner wall of the sliding box 251, thereby moving the sliding box 251. During the process of the frame teeth 253 moving to the inner wall, the engaging shaft teeth 255 drive the limiting plate 254 to rotate 90°. Subsequently, the limiting plate 254 moves with the sliding box 251 and clamps the cable saddle between the two square frames 110. At the same time, the round rod 256 moves along the guide groove 111, and the end actuates the bottom sliding groove 261 of the plate, causing the bending plate 260 to move inward, so that the pulley 290 abuts against the outer wall of the cable saddle and compresses the first spring 280 to contract, thereby fixing the cable saddle at the center position inside the two square frames 110. This setup, by controlling the activation of two first motors 210, drives the change in position of the limiting part 250 and the two upper bending plates 260, thus completely replacing manual adjustment of the cable saddle position and eliminating errors in manual alignment.

[0064] Please see Figures 1-7 As shown, in this embodiment, the adjustment mechanism 300 includes a second motor 320, an outer lead screw 330 driven by the second motor 320, a movable plate 340 sleeved on the outer lead screw 330, and a pair of self-locking parts 350. After the cable saddle is moved to the designated position by the crane, the second motor 320 drives the outer lead screw 330 to move the movable plate 340, thereby driving the movable group 100 to make a fine adjustment to the installation position of the cable saddle.

[0065] Specifically, the second motor 320 is fixedly connected to the outer wall of the right end of the fixed frame 310 by bolts, the external lead screw 330 is coaxially connected to the output shaft of the second motor 320, the movable plate 340 is slidably connected to the inside of the fixed frame 310 and threadedly connected to the external lead screw 330, the size of the movable plate 340 is adapted to the internal size of the concave frame 140, and two grooves are provided on the bottom surface of the movable plate 340.

[0066] Furthermore, the second motor 320 in the adjustment mechanism 300 is activated, driving the external lead screw 330 to rotate, causing the moving plate 340 to move towards the concave frame 140. With this configuration, after the moving plate 340 leaves the self-locking part 350, the limiting block 352 moves upward under the elastic force of the second spring 354 at the bottom, driving the connecting rod 353 to change the position of the locking plate 356, thereby restricting the self-locking wheel 355 at the bottom of the fixed frame 310. Subsequently, the moving plate 340 abuts against the concave frame 140, and the sliding rod 130 drives the movement of a pair of frames 110. Since the saddle has been pre-locked inside the moving assembly 100 by the clamping device 200, the movement of the moving assembly 100 can precisely drive the saddle to make fine adjustments. After the saddle slowly moves to the installation position, the second motor 320 is turned off, and the crane continues to lower the saddle, accurately placing it in the installation position.

[0067] Please see Figures 1-8 As shown, in this embodiment, the self-locking part 350 includes a square box 351 that is snapped and fixed to the bottom surface inside the fixed frame 310, a limiting block 352 that is slidably connected to the inside of the square box 351, a connecting rod 353 that is snapped and fixed to the bottom surface of the limiting block 352, a second spring 354 that is sleeved on the outside of the connecting rod 353, a self-locking wheel 355 that is fixed to the bottom surface of the fixed frame 310 by bolts, and a locking plate 356 that is rotatably connected to the bracket on the outside of the self-locking wheel 355.

[0068] Specifically, a through groove 3510 is provided on the top surface of the square box 351, the longitudinal section of the limiting block 352 is a right trapezoid, the upper and lower ends of the second spring 354 are welded and fixed to the inner bottom surface of the fixed frame 310 and the bottom surface of the limiting block 352 respectively, and the bottom end of the connecting rod 353 is rotatably connected to the end of the locking plate 356.

[0069] Furthermore, when the moving plate 340 moves away from the self-locking part 350, the limiting block 352 moves upward under the elastic force of the second spring 354 at the bottom, which drives the connecting rod 353 to change the position of the locking plate 356, thereby restricting the self-locking wheel 355 at the bottom of the fixed frame 310. This setting allows the adjusting mechanism 300 to trigger the self-locking mechanism of the self-locking part 350 before adjusting the cable saddle displacement, thereby fixing the adjusting mechanism 300, ensuring the stability of the cable saddle movement, and ensuring the accuracy of the cable saddle installation position.

[0070] The present invention also provides a measurement and positioning method for high-precision installation of suspension bridge cable saddles based on radio wave ranging. Using the aforementioned measurement and positioning device for high-precision installation of suspension bridge cable saddles based on radio wave ranging, the method includes the following steps:

[0071] S1. The operator uses a crane to transport the cable saddle placed under the pier to the top of the suspension bridge pier, and then transports the cable saddle from the left side of the moving group 100 to between a pair of frames 110.

[0072] S2. Start the first motor 210 in the clamping device 200, drive the worm 220 to rotate, and engage the worm wheel 230 to drive the bidirectional lead screw 240 to rotate inside the frame 110.

[0073] S3. At this time, the bidirectional lead screw 240 drives the frame teeth 253 in the two end limit parts 250 to move to the inner wall of the sliding box 251, and then drives the sliding box 251 to move. During the process of the frame teeth 253 moving to the inner wall, the meshing shaft teeth 255 drive the limit plate 254 to rotate 90°.

[0074] S4. Subsequently, as the limiting plate 254 moves with the sliding box 251, it clamps the cable saddle between two pairs of frames 110. At the same time, the round rod 256 moves along the guide groove 111, and its end pushes the bottom sliding groove 261 of the plate, causing the bending plate 260 to move inward, so that the pulley 290 abuts against the outer wall of the cable saddle and squeezes the first spring 280 to contract, thereby fixing the cable saddle in the center position inside one pair of frames 110.

[0075] S5. Next, the cable saddle, along with the entire positioning device, is moved toward the installation position on the guide rail 400 by the bottom crane. Meanwhile, the operator at the top of the pier observes the position information of the cable saddle in real time using the rangefinder 150 of the moving group 100.

[0076] S6. After the cable saddle is moved to the left side of the installation position, the operator sends a signal to the crane operator to stop the movement of the crane boom. Then, the second motor 320 in the adjustment mechanism 300 is started to drive the external lead screw 330 to rotate, which in turn drives the moving plate 340 to move towards the concave frame 140.

[0077] S7. At this time, after the moving plate 340 leaves the top of the self-locking part 350, the limiting block 352 moves upward under the elastic force of the bottom second spring 354, which drives the connecting rod 353 to drive the position of the locking plate 356 to change, thereby restricting the self-locking wheel 355 at the bottom of the fixed frame 310.

[0078] S8. Subsequently, the movable plate 340 abuts against the concave frame 140, and the sliding rod 130 drives the movement of the frame 110. After the cable saddle slowly moves to the installation position, the second motor 320 is turned off, and the crane continues to be operated to lower the cable saddle and accurately place the cable saddle in the installation position.

[0079] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. A high-precision measurement and positioning device for the installation of suspension bridge cable saddles based on radio wave ranging, characterized in that: It includes a moving assembly fitted outside the cable saddle, a clamping device located inside the moving assembly, an adjustment mechanism located on the right side of the moving assembly, and two guide rails. The moving assembly includes two symmetrically arranged rectangular frames, each with two guide grooves on its top surface. The moving assembly also includes a connecting frame bolted to the right end of the two rectangular frames, two sliding rods welded to the outer wall of the connecting frame, a concave frame snapped to the right end of the sliding rods, a rangefinder bolted to the center of the outer wall of the rectangular frames, and a traveling wheel bolted to the bottom left side of the rectangular frames. The top surface of each rectangular frame has frame surface grooves on both sides of the guide grooves. The rangefinder transmits the position of the saddle in real time via radio waves. The clamping device includes a first motor, a bidirectional lead screw driven by the first motor, a limiting part disposed at the end of the bidirectional lead screw, a bending plate disposed on the top surface of the frame, and a pulley that moves with the bending plate. The limiting part includes a sliding box, a frame tooth sleeved on the outside of the bidirectional lead screw, a limiting plate rotating in the sliding box, a shaft tooth sleeved on the end of the limiting plate, and a round rod sliding on the top surface of the sliding box. The bottom surface of the bending plate is provided with a bottom sliding groove, and the top end of the round rod extends into the bottom sliding groove after passing through the guide groove. The first motor drives the bidirectional lead screw to move the frame teeth to the inner wall of the sliding box, and then drives the sliding box to move. It also engages with the shaft teeth to drive the limiting plate to flip. The limiting plate completes the clamping of the cable saddle as the sliding box moves. At this time, the round rod moves along the guide groove, driving the bending plate to move inward and making the pulley abut against the outer wall of the cable saddle. The adjustment mechanism includes a second motor, an outer lead screw driven by the second motor, a movable plate sleeved on the outer lead screw, and a pair of self-locking parts. After the cable saddle is moved to the designated position by the crane, the second motor drives the outer lead screw to move the movable plate, thereby driving the movable group to finely adjust the installation position of the cable saddle.

2. The measurement and positioning device for high-precision installation of suspension bridge cable saddles based on radio wave ranging according to claim 1, characterized in that: The first motor is fixedly connected to the top surface of the frame by bolts. A worm gear is coaxially connected to the output shaft of the first motor. The two ends of the bidirectional lead screw are rotatably connected to the inner walls of the left and right ends of the frame, and a worm wheel that meshes with the worm gear is locked and fixed at the center of the outer wall of the bidirectional lead screw.

3. The high-precision measurement and positioning device for suspension bridge cable saddle installation based on radio wave ranging according to claim 2, characterized in that: The sliding box is slidably connected to the inside of the frame. A protruding strip is welded and fixed on the inner wall of the sliding box. A box surface groove is opened on the top surface of the sliding box. A box surface through groove is opened on the outer wall of the sliding box. The frame teeth are threadedly connected to the bidirectional lead screw and slidably connected to the inside of the sliding box.

4. The measurement and positioning device for high-precision installation of suspension bridge cable saddles based on radio wave ranging according to claim 3, characterized in that: The limiting plate is rotatably connected to the inside of the sliding box via a convex shaft at its end. The shaft tooth is engaged and fixed to the outside of the convex shaft at the end of the limiting plate and meshes with the frame tooth. The bottom end of the round rod is slidably connected to the inside of the sliding groove on the box surface.

5. The high-precision measurement and positioning device for suspension bridge cable saddle installation based on radio wave ranging according to claim 4, characterized in that: A slider that is slidably connected to the inside of the frame groove is welded and fixed to the bottom surface of the bending plate. A telescopic rod is snapped and fixed between the bending plate and the pulley. A first spring is sleeved on the outside of the telescopic rod. The two ends of the first spring are welded and fixed to the outer wall of the bending plate and the outer wall of the pulley's outer support, respectively.

6. The measuring and positioning device for high-precision installation of suspension bridge cable saddles based on radio wave ranging according to claim 5, characterized in that: The second motor is fixedly connected to the outer wall of the right end of the fixed frame by bolts. The external lead screw is coaxially connected to the output shaft of the second motor. The movable plate is slidably connected to the inside of the fixed frame and threadedly connected to the external lead screw. The size of the movable plate is adapted to the internal size of the concave frame. Two grooves are provided on the bottom surface of the movable plate.

7. The measuring and positioning device for high-precision installation of suspension bridge cable saddles based on radio wave ranging according to claim 6, characterized in that: The self-locking part includes a square box that is snapped and fixed to the bottom surface inside the fixed frame, a limiting block that is slidably connected to the inside of the square box, a connecting rod that is snapped and fixed to the bottom surface of the limiting block, a second spring that is sleeved on the outside of the connecting rod, a self-locking wheel that is fixedly connected to the bottom surface of the fixed frame by bolts, and a locking plate that is rotatably connected to the bracket on the outside of the self-locking wheel.

8. The measurement and positioning device for high-precision installation of suspension bridge cable saddles based on radio wave ranging according to claim 7, characterized in that: The top surface of the box has a through groove running vertically through it. The longitudinal section of the limiting block is a right trapezoid. The upper and lower ends of the second spring are welded and fixed to the inner bottom surface of the fixed frame and the bottom surface of the limiting block, respectively. The bottom end of the connecting rod is rotatably connected to the end of the locking plate.

9. A measurement and positioning method for high-precision installation of suspension bridge cable saddles based on radio wave ranging, using the measurement and positioning device for high-precision installation of suspension bridge cable saddles based on radio wave ranging as described in claim 8, characterized in that... Includes the following steps: S1. Operators use a crane to transport the cable saddle placed under the pier to the top of the suspension bridge pier, and then transport the cable saddle from the left side of the moving group to a pair of frames. S2. Start the first motor in the clamping device to drive the worm gear to rotate and engage the worm wheel to drive the bidirectional lead screw to rotate inside the frame; S3. At this time, the bidirectional lead screw drives the frame teeth in the limiting parts at both ends to move to the inner wall of the sliding box and then drives the sliding box to move. During the process of the frame teeth moving to the inner wall, the meshing shaft teeth drive the limiting plate to rotate 90°. S4. Subsequently, as the limiting plate moves with the sliding box, it clamps the cable saddle between two pairs of frames. At the same time, the round rod moves along the guide groove, and the end pushes the bottom groove of the plate, causing the bending plate to move inward, so that the pulley abuts against the outer wall of the cable saddle and squeezes the first spring to compress the first spring, thereby fixing the cable saddle in the center position inside a pair of frames. S5. Next, the cable saddle, along with the entire positioning device, is moved along the guide rail to the installation position using the bottom crane. Meanwhile, the operator at the top of the pier observes the position information of the cable saddle in real time using the rangefinder of the moving group. S6. After the cable saddle is moved to the left side of the installation position, the operator sends a signal to the crane operator to stop the movement of the crane boom. Then, the second motor in the adjustment mechanism is started to drive the outer screw to rotate, which in turn moves the moving plate towards the concave frame. S7. At this time, after the moving plate leaves the top of the self-locking part, the limiting block moves upward under the elastic force of the second spring at the bottom, thereby driving the connecting rod to change the position of the locking plate, and thus restricting the self-locking wheel at the bottom of the fixed frame. S8. Subsequently, the moving plate abuts against the concave frame, thereby driving the movement of one pair of frames through the slide rod. After the cable saddle slowly moves to the installation position, the second motor is turned off, and the crane continues to be operated to lower the cable saddle, thereby accurately placing the cable saddle in the installation position.

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