A device for monitoring closure construction of a cantilever continuous beam bridge
The multi-dimensional laser monitoring device solved the problem of low data accuracy during the closure of cantilever continuous beam bridges, achieving efficient and accurate monitoring of beam spacing and deflection angle, thus meeting construction safety requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA RAILWAY FIFTH BUREAU GRP CHENGDU ENG CO LTD
- Filing Date
- 2025-12-25
- Publication Date
- 2026-05-22
AI Technical Summary
Existing technologies, when performing closure of cantilever continuous beam bridges, rely on purely visual monitoring solutions, which result in low data accuracy. They cannot simultaneously monitor multiple continuous beams using a benchmark beam segment as a base point, and the data collection points are independent, failing to meet construction requirements.
A multi-dimensional laser monitoring device is adopted, including a multi-dimensional laser monitoring transmitting unit and a feedback unit. The laser transmitting and receiving parts are used to measure distances on different axes. Combined with servo motors and wireless signal control, it can achieve fast and accurate monitoring of beam spacing and deflection angle.
It improves monitoring accuracy, enables rapid adjustment of data benchmarks, reduces timeliness errors, provides more timely safety monitoring, and meets construction requirements.
Smart Images
Figure CN121409114B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bridge technology, and in particular to a monitoring device for the closure construction of a cantilever continuous beam bridge. Background Technology
[0002] When a cantilever continuous beam bridge is closed, its joints need to be monitored synchronously to ensure that the expansion joints are within a reasonable range and that the mating surfaces are nearly parallel. Different construction sections have different data requirements, and the existing technology for monitoring these conditions is to achieve this through a purely visual solution using monitoring cameras. However, the data accuracy of this solution is not high, and it cannot meet the construction requirements in some cases. Furthermore, the data collected at the points is relatively independent, making it impossible to collect data from multiple continuous beams using a reference beam section as a base point. Summary of the Invention
[0003] This invention provides a monitoring device for the closure construction of a cantilever continuous beam bridge to solve the technical problems mentioned in the background art.
[0004] This invention is achieved by the following technical solution:
[0005] A monitoring device for the closure construction of a cantilever continuous beam bridge; including
[0006] A multidimensional laser monitoring and emitting unit includes a base for fixing to a continuous beam, a height-adjustable support arm movably mounted on the base for adjusting its spatial position, a multi-point emitting frame movably mounted at the end of the height-adjustable support arm, and multiple laser emitting units mounted at the ends of the multi-point emitting frame.
[0007] The multidimensional laser monitoring feedback unit includes a base for fixing to a continuous beam two or a continuous beam three, a height-adjustable support arm movably mounted on the base for adjusting its spatial position, and a multi-point receiving frame mounted at the end of the height-adjustable support arm. The end of the multi-point receiving frame is fixedly provided with a laser receiving part, and the laser receiving parts on different multi-point receiving frames are not on the same axis.
[0008] In a preferred embodiment, the base includes a base, the four corners of which are fixed by bolts. A screw and two guide rods are rotatably provided on the base. The height-adjustable support arm includes a support arm and a linear sliding bearing, wherein the linear sliding bearing is embedded in the inner hole of the support arm and slides in cooperation with the guide rods. The screw is threaded in cooperation with the support arm.
[0009] In a preferred embodiment, a second drive motor is provided at the upper end of the support arm in the multi-dimensional laser monitoring and emitting unit. The main shaft of the second drive motor is coaxially fixed with the rotating shaft of the multi-point emitting frame. The second drive motor is used to drive the multi-point emitting frame to rotate at a specified angle, thereby enabling the laser emitting part and different laser receiving parts to be coaxially aligned to achieve multi-point ranging.
[0010] In a preferred embodiment, the base is further provided with a drive motor, the main shaft of the drive motor is fixed with a driving bevel gear by a key, the screw shaft extends downward and is fixed with a driven bevel gear by a key, the driving bevel gear and the driven bevel gear mesh, and the drive motor drives the screw to rotate to change the actual height of the multi-point launcher.
[0011] In a preferred embodiment, the base further includes a wireless signal receiving and driving module, which is used to receive wireless signals to drive the first drive motor and the second drive motor to perform a specified displacement.
[0012] In a preferred embodiment, the multi-point receiving frame includes a cross-shaped aluminum alloy frame II and a rotating shaft fixed to the center of gravity of the aluminum alloy frame II. The aluminum alloy frame II is rotatably mounted on the upper end of the support arm via the rotating shaft. The support arm is also provided with a fixing bolt. After the fixing bolt is tightened, the rotating shaft of the aluminum alloy frame II is clamped and fixed relative to the support arm. Different multi-dimensional laser monitoring feedback units can adjust the aluminum alloy frame II to achieve different postures.
[0013] In a preferred embodiment, the aluminum alloy frames on two adjacent multidimensional laser monitoring feedback units are offset at a 45-degree angle in the circumferential direction.
[0014] In a preferred embodiment, the distance from the laser emitting part on each of the four aluminum alloy frames to the shaft of the drive motor is the same.
[0015] In a preferred embodiment, the first aluminum alloy frame and the second aluminum alloy frame are four-way telescopic structures, the center distance from the laser emitting part to the center of the first aluminum alloy frame is adjustable, and the center distance from the laser receiving part to the center of the second aluminum alloy frame is adjustable.
[0016] The advantages and positive effects of this invention are as follows: Compared with traditional purely visual (using surveillance cameras) monitoring solutions, the laser ranging of this application has higher accuracy. It can not only quickly measure the distance between two adjacent continuous beam segments, but also monitor non-adjacent continuous beam segments by rotating the multi-point transmitter. Importantly, it can quickly calibrate the monitoring status of two adjacent continuous beams to adjust the data benchmark, and then quickly rotate the multi-point transmitter so that the laser can be sent to the laser receiver on the next multi-point receiver. This is more efficient than traditional manual laser monitoring or purely visual detection, with a shorter monitoring time interval and smaller time error. Furthermore, by emitting and monitoring the distance signals from four laser transmitters, it is possible to preliminarily determine whether there is a deflection angle between the beams (normally, when the four laser ranging signals are consistent, it indicates that the two monitored beams are aligned (within a reasonable error range). When the tilt angle of one beam relative to another changes, the four measured data will be different). This is more timely than traditional purely visual monitoring, resulting in better safety monitoring. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is a 3D view of the multi-dimensional laser monitoring emission unit;
[0019] Figure 2 This is a 3D view of the multi-dimensional laser monitoring feedback unit;
[0020] Figure 3 This is a schematic diagram of a multi-dimensional laser monitoring emission unit combined with two multi-dimensional laser monitoring feedback units;
[0021] Figure 4 yes Figure 3 A side front view;
[0022] Figure 5 This is a schematic diagram of an embodiment of the present invention.
[0023] Reference numerals: 10. Aluminum alloy frame one; 11. Laser transmitter; 12. Support arm; 13. Wireless signal receiving drive module; 14. Drive motor one; 15. Screw; 16. Guide rod; 17. Base; 18. Drive motor two; 19. Aluminum alloy frame two; 20. Laser receiver; 21. Continuous beam one; 22. Continuous beam two; 23. Continuous beam three; 25. Base; 26. Height-adjustable support arm; 27. Multi-point transmitter; 28. Multi-point receiver. Detailed Implementation
[0024] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.
[0025] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:
[0026] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.
[0027] like Figure 1-5 As shown, the present invention provides a monitoring device for the closure construction of a cantilever continuous beam bridge; comprising:
[0028] The multidimensional laser monitoring and emitting unit includes a base 25 for fixing to a continuous beam 21; a height-adjustable support arm 26 movably mounted on the base 25 to adjust its spatial position; a multi-point emitting frame 27 movably mounted at the end of the height-adjustable support arm 26; and multiple laser emitting parts 11 mounted at the ends of the multi-point emitting frame 27. Specifically, the laser emitting parts 11 emit horizontal ranging rays based on the same vertical plane.
[0029] A multi-dimensional laser monitoring feedback unit includes a base 25 for fixing to a second continuous beam 22 or a third continuous beam 23; a height-adjustable support arm 26, movably mounted on the base 25 to adjust its spatial position; and a multi-point receiving frame 28, located at the end of the height-adjustable support arm 26. A laser receiving part 20 is fixedly mounted at the end of the multi-point receiving frame 28, and the laser receiving parts 20 on different multi-point receiving frames 28 are not on the same axis (e.g., ...). Figure 3 , 4 );
[0030] Specifically, the second continuous beam 22 and the third continuous beam 23 serve as the subsequent construction continuous beams of the first continuous beam 21. Construction is carried out with the first continuous beam 21 as the reference. The number of multi-dimensional laser monitoring feedback units can be determined according to the actual number of continuous beams. The multi-point transmitter 27 rotates to a specified angle so that the adjacent laser receiver 20 receives the laser signal from the laser transmitter 11 for ranging. Subsequently, the angle is adjusted sequentially according to the laser emission direction to achieve multiple ranging stages.
[0031] In a preferred embodiment, such as Figure 1 The base 25 includes a base 17, which is fixed at its four corners by bolts. A screw 15 and two guide rods 16 are rotatably mounted on the base 17. The height adjustment arm 26 includes an arm 12 and a linear sliding bearing. The linear sliding bearing is embedded in the inner hole of the arm 12 and slides with the guide rods 16. The screw 15 is threadedly engaged with the arm 12. After the screw 15 rotates, the arm 12 moves vertically up and down relative to the base 17 through the movement of the helical pair and the cooperation of the guide rods 16 and the sliding bearing, which facilitates subsequent adjustment of the laser emission height.
[0032] In a preferred embodiment, such as Figure 1 A second drive motor 18 is provided at the upper end of the support arm 12 in the multi-dimensional laser monitoring and emitting unit. The main shaft of the second drive motor 18 is coaxially fixed with the rotating shaft of the multi-point emitting frame 27. The second drive motor 18 is used to drive the multi-point emitting frame 27 to rotate at a specified angle, thereby enabling the laser emitting part 11 to be coaxial with different laser receiving parts 20 to achieve multi-point ranging.
[0033] In a preferred embodiment, the base 17 is further provided with a drive motor 14. The main shaft of the drive motor 14 is fixed with a driving bevel gear by a key. The rotating shaft of the screw 15 extends downward and is fixed with a driven bevel gear by a key. The driving bevel gear and the driven bevel gear mesh. The drive motor 14 drives the screw 15 to rotate to change the actual height of the multi-point launcher 27. Specifically, the drive motor 18 and the drive motor 14 are high-precision servo motors. The servo motors achieve precise control of position, speed and torque through a closed-loop system (encoder feedback). The positioning accuracy can reach 0.001 mm, completely solving the stepper motor step loss problem.
[0034] In a preferred embodiment, the base 25 further includes a wireless signal receiving and driving module 13, which is used to receive wireless signals to drive the first drive motor 14 and the second drive motor 18 to perform a specified displacement. This technology is existing technology and will not be described in detail here. In this way, online monitoring can be achieved through remote control, which is more efficient.
[0035] In a preferred embodiment, the multi-point receiving frame 28 includes a cross-shaped aluminum alloy frame 2 19 and a pivot fixed to the center of gravity of the aluminum alloy frame 2 19. The pivot allows the aluminum alloy frame 2 19 to be rotatably mounted on the upper end of the support arm 12 (e.g., Figure 2The support arm 12 is also provided with a fixing bolt. After the fixing bolt is tightened, the rotating shaft of the aluminum alloy frame 2 19 is clamped and fixed relative to the support arm 12. Different multi-dimensional laser monitoring feedback units can adjust the aluminum alloy frame 2 19 to achieve different postures. In this way, they are relatively staggered. After the aluminum alloy frame 1 10 rotates at a certain angle, it can measure the distance of different multi-dimensional laser monitoring feedback units.
[0036] In a preferred embodiment, such as Figure 3 The aluminum alloy frames 19 on two adjacent multidimensional laser monitoring feedback units are offset at a 45-degree angle in the circumferential direction. Specifically, after the laser emitting unit 11 measures the distance to the adjacent laser receiving unit 20, a specified threshold control amount can be input through a remote control signal to drive the aluminum alloy frame 10 to rotate 45 degrees via the drive motor 18. This allows the laser emitting unit 11 to measure the distance to the next multidimensional laser monitoring feedback unit, enabling rapid measurement of multiple continuous beams and preliminary monitoring of deflection angles, providing safety warnings.
[0037] In a preferred embodiment, the distance from the laser emitting part 11 on the four aluminum alloy frames 10 to the rotating shaft of the drive motor 18 is the same. Specifically, the distance from the four laser receiving parts 20 on the aluminum alloy frame 19 to the rotating shaft of the aluminum alloy frame 19 is the same, which facilitates rotational coordination monitoring.
[0038] In a preferred embodiment, the aluminum alloy frame 10 and the aluminum alloy frame 19 are four-way telescopic structures. The center distance between the laser emitting part 11 and the center distance between the laser receiving part 20 and the center distance between the aluminum alloy frame 19 are adjustable, which facilitates distance measurement adjustment according to actual conditions.
[0039] It should be emphasized that the embodiments described in this invention are illustrative rather than limiting. Therefore, this invention is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this invention also fall within the scope of protection of this invention.
Claims
1. A monitoring device for the closure construction of a cantilever continuous beam bridge, characterized in that: include The multidimensional laser monitoring and emitting unit includes a base (25) for fixing on a continuous beam (21); a height-adjustable support arm (26) movably mounted on the base (25) for adjusting its spatial position; a multi-point emitting frame (27) movably mounted at the end of the height-adjustable support arm (26); and multiple laser emitting parts (11) mounted at the ends of the multi-point emitting frame (27). The multidimensional laser monitoring feedback unit includes a base (25) for fixing on continuous beam two (22) or continuous beam three (23); a height adjustment arm (26) movably mounted on the base (25) to adjust its spatial position; and a multi-point receiving frame (28) mounted at the end of the height adjustment arm (26), wherein a laser receiving part (20) is fixedly mounted at the end of the multi-point receiving frame (28), and the laser receiving parts (20) on different multi-point receiving frames (28) are not on the same axis. The base (25) includes a base (17), which is fixed at the four corners by bolts. A screw (15) and two guide rods (16) are rotatably provided on the base (17). The height adjustment arm (26) includes an arm (12) and a linear sliding bearing. The linear sliding bearing is embedded in the inner hole of the arm (12) and slides with the guide rods (16). The screw (15) is threaded with the arm (12). A second drive motor (18) is provided at the upper end of the support arm (12) in the multi-dimensional laser monitoring and emitting unit. The main shaft of the second drive motor (18) is coaxially fixed with the rotating shaft of the multi-point emitting frame (27). The second drive motor (18) is used to drive the multi-point emitting frame (27) to rotate by a specified angle, so that the laser emitting part (11) and different laser receiving parts (20) are coaxial to realize multi-point ranging.
2. The monitoring device for the closure construction of a cantilever continuous beam bridge according to claim 1, characterized in that: The base (17) is also provided with a drive motor (14). The main shaft of the drive motor (14) is fixed with an active bevel gear by a key. The rotating shaft of the screw (15) extends downward and is fixed with a driven bevel gear by a key. The active bevel gear and the driven bevel gear mesh. The drive motor (14) drives the screw (15) to rotate to change the actual height of the multi-point launcher (27).
3. The monitoring device for the closure construction of a cantilever continuous beam bridge according to claim 2, characterized in that: The base (25) also includes a wireless signal receiving and driving module (13), which is used to receive wireless signals to drive the first drive motor (14) and the second drive motor (18) to perform a specified displacement.
4. The monitoring device for the closure construction of a cantilever continuous beam bridge according to claim 2, characterized in that: The multi-point receiving frame (28) includes a cross-shaped aluminum alloy frame two (19) and a rotating shaft fixed to the center of gravity of the aluminum alloy frame two (19). The aluminum alloy frame two (19) is rotated and set on the upper end of the support arm (12) by the rotating shaft. The support arm (12) is also provided with a fixing bolt. After the fixing bolt is tightened, the rotating shaft of the aluminum alloy frame two (19) is clamped and fixed relative to the support arm (12). Different multi-dimensional laser monitoring feedback units can adjust the aluminum alloy frame two (19) to achieve different postures.
5. The monitoring device for the closure construction of a cantilever continuous beam bridge according to claim 2, characterized in that: The aluminum alloy frames (19) on the two adjacent multidimensional laser monitoring feedback units are offset at a 45-degree angle in the circumferential direction.
6. The monitoring device for the closure construction of a cantilever continuous beam bridge according to claim 4, characterized in that: The laser emitting part (11) is mounted on the aluminum alloy frame (10), and the distance from the multiple laser emitting parts (11) to the shaft of the drive motor (18) is the same.
7. The monitoring device for the closure construction of a cantilever continuous beam bridge according to claim 6, characterized in that: The aluminum alloy frame one (10) and aluminum alloy frame two (19) are four-way telescopic structures. The center distance between the laser emitting part (11) and the center distance between the laser receiving part (20 ...