Method and device for measuring eccentricity of railway bridge line beam

Abstract

The invention provides a railway bridge line beam eccentricity measuring method, which at least comprises the following steps of: acquiring position information of a bridge guardrail by adopting a radar module, and adjusting the height position of a laser ranging module according to the position information, so that the laser ranging module can detect the bridge guardrail for ranging; the laser ranging module is adopted to measure the distances between the first steel rail and the bridge guardrails on the two sides of the first steel rail at the same time, and the eccentric distance is calculated according to the distance parameters measured by the laser ranging module and the track gauge of the track. The invention provides a device for measuring the eccentricity of the railway bridge line beam. The measuring device is applied to the method for measuring the eccentricity of the railway bridge line beam. The method has the beneficial effect that the eccentric distance along the track can be automatically and continuously measured.

Description

Technical Field

[0001] This invention relates to the field of railway bridge track eccentricity measurement technology, and particularly to a method and apparatus for measuring the eccentricity of railway bridge beams. Background Technology

[0002] Railway bridges are structures built to cross rivers, lakes, straits, valleys, or other obstacles, and to facilitate grade-separated intersections of railway lines with other railway lines or roads. The eccentricity of a railway bridge's beams refers to the distance between the railway line's centerline and the bridge beam's centerline. It is a critical parameter affecting train operation safety. During railway bridge operation, the eccentricity needs to be frequently measured to ensure it remains within the allowable range specified in regulations, preventing structural instability due to excessive eccentricity.

[0003] Traditional methods for measuring the eccentricity of railway bridge beams mainly rely on manual operation, such as using total stations and steel tape measures. However, this method has the following drawbacks: (1) Low efficiency: It requires multiple stops for measurement, which takes a long time; (2) Poor accuracy: Manual readings are easily affected by subjective errors; (3) Low safety: Personnel need to enter the railway clearance, which poses a safety hazard; (4) Data discontinuity: Only discrete point data can be obtained, which cannot fully reflect the overall offset trend of the beam.

[0004] Therefore, it is necessary to study a method and device for measuring the eccentricity of railway bridge beams in order to solve the above problems or mitigate their impact. Summary of the Invention

[0005] This invention provides a method for measuring the eccentricity of railway bridge beams. By capturing the position information of the bridge railing with a radar module and quickly adjusting the height of the laser ranging module, the laser ranging module can automatically and continuously measure the eccentricity along the track as it travels along the track, thereby effectively solving the above-mentioned problems or mitigating their impact.

[0006] The method for measuring the eccentricity of railway bridge beams according to the present invention includes at least the following steps: The laser ranging module is positioned above the first rail of the track, and moves along the length of the track. A radar module is used to acquire the location information of the bridge railing, and the height position of the laser ranging module is adjusted according to the location information so that the laser ranging module can detect the bridge railing for distance measurement. The laser ranging module is used to simultaneously measure the distance between the first rail and the bridge railings on both sides. The eccentricity is calculated based on the distance parameters measured by the laser ranging module and the track gauge. Based on the measured eccentricity and the mileage traveled by the laser ranging module along the track, a curve is output.

[0007] In one embodiment, the measurement method further includes using a displacement sensor to measure the lateral offset of the second rail of the track relative to the first rail, and correcting a first lateral deviation of the track gauge based on the lateral offset.

[0008] In one embodiment, the measurement method further includes using an inclination sensor to measure the lateral tilt angle of the track relative to the horizontal plane, and correcting the height deviation of the second rail relative to the first rail based on the lateral tilt angle.

[0009] In one embodiment, the measurement method further includes using an inertial module to measure the lateral vibration of the laser ranging module during its movement, and correcting the second lateral deviation of the laser ranging module relative to the first rail during detection based on the lateral vibration.

[0010] In one embodiment, the laser ranging module is used to measure the distances between the first rail and the bridge railings on both sides, including: Measurements are performed using a first laser rangefinder and a second laser rangefinder that are symmetrically distributed and have opposite measurement directions. Specifically, the first laser ranging sensor is used to measure the first distance between the first rail and the first bridge rail, and the second laser ranging sensor is used to measure the second distance between the first rail and the second bridge rail. The first bridge rail and the first rail are located on the same side of the center line of the beam.

[0011] In one embodiment, the formula for calculating the eccentricity of the measurement method is: ; In the formula, E is the eccentricity, R1 is the correction coefficient of the first laser rangefinder, D1 is the first distance value, R2 is the correction coefficient of the second laser rangefinder, D2 is the second distance value, A is the lateral vibration, B is the lateral offset, D0 is the standard gauge, and α is the lateral tilt angle.

[0012] The present invention also provides a measuring device for the eccentricity of a railway bridge beam, the measuring device being applied to the method for measuring the eccentricity of a railway bridge beam as described above, the measuring device comprising at least: A moving mechanism is used to be erected on a track and move along the length of the track, and a measuring rod is provided on the moving mechanism corresponding to the first rail of the track; An adjustment mechanism is provided on the measuring rod, and the adjustment mechanism is capable of moving and adjusting along the measuring rod; A radar module, which is installed on the top of the measuring rod, is used to acquire the location information of the bridge railing; A laser ranging module is mounted on the adjustment mechanism and is used to measure the distance between the first rail and the bridge railings on both sides.

[0013] In one embodiment, the laser ranging module includes a first laser ranging sensor and a second laser ranging sensor, which are symmetrically distributed on both sides of the measuring rod and have opposite measuring directions.

[0014] In one embodiment, the adjustment mechanism includes an adjustment component and a drive component. The adjustment component is movably mounted on the measuring rod and is used to mount the laser ranging module. The drive component is used to drive the adjustment component to move and adjust along the measuring rod.

[0015] In one embodiment, the measuring device further includes a flexible telescopic mechanism, which includes a flexible telescopic component and a displacement sensor; One end of the flexible telescopic component is connected to the lateral limiting component of the moving mechanism, and the other end is connected to the displacement sensor; the flexible telescopic component can elastically expand and contract along the lateral direction of the track to compensate for the lateral distance deviation between the two rails of the track; the displacement sensor is used to measure the lateral displacement change of the flexible telescopic component.

[0016] The method for measuring the eccentricity of railway bridge beams provided by this invention has at least the following advantages compared with the prior art: The method for measuring the eccentricity of railway bridge beams in this invention uses a radar module to capture the position information of the bridge railing and quickly adjusts the height of the laser ranging module. This allows the laser ranging module to automatically and continuously measure the eccentricity along the track as it travels. This replaces manual measurement and reading, enabling continuous measurement of the overall beam offset trend along the track, thereby improving measurement accuracy, efficiency, and operational safety.

[0017] The present invention provides a measuring device for measuring the eccentricity of railway bridge beams. Since it is applied to the above-mentioned method for measuring the eccentricity of railway bridge beams, it also has the aforementioned beneficial effects. Attached Figure Description The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0018] Figure 1 This is a flowchart of a measurement method according to an embodiment of the present invention; Figure 2 This is a schematic diagram of data acquisition in the measurement method of this invention embodiment; Figure 3 This is a schematic diagram illustrating the eccentricity calculation principle of an embodiment of the present invention; Figure 4 This is a schematic diagram of the overall structure of the measuring device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the adjustment mechanism according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the flexible telescopic mechanism according to an embodiment of the present invention; Figure 7 This is a curve output from an embodiment of the present invention for detecting a certain bridge section.

[0019] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0020] Figure label: 1-Laser ranging module, 110-First laser ranging sensor, 120-Second laser ranging sensor, 130-Mounting housing, 2-Radar module, 3-Adjustment mechanism, 310-Adjustment component, 311-Adjustment block, 312-Housing, 320-Drive component, 321-Motor, 322-Drive rod, 4-Moving mechanism, 410-Measuring rod, 420-First vehicle body, 430-Second vehicle body, 440-Walking wheel, 450-Lateral limit component, 451-Limit frame, 452-Limit wheel, 5-Flexible telescopic mechanism, 510-Flexible telescopic component, 511-Elastic element, 512-Displacement transmission rod, 520-Displacement sensor, 530-Switch handle, 6-Inertial module, 7-Tilt sensor, 8-Data processing unit, 9-Mileage measurement module, 10-Display module, 11-First rail, 12-Second rail. Detailed Implementation

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Example 1 An embodiment of the present invention provides a method for measuring the eccentricity of a railway bridge beam, which can be referred to in the accompanying drawings. Figures 4 to 6 The measurement method of this embodiment can be understood by referring to the device structure shown in the drawings, but the measurement method of the present invention is not limited to the device structure shown in the drawings. Figures 1 to 6 As shown, the measurement method proposed in this embodiment includes the following steps: Step S100: The laser ranging module 1 is positioned above the first rail 11 of the track, and moves along the length of the track.

[0023] Specifically, the laser ranging module 1 is mounted on the moving mechanism 4 via the adjusting mechanism 3, allowing the laser ranging module 1 to move along the length of the track via the moving mechanism 4 for continuous measurement along the track. The laser ranging module 1 can also adjust its height via the adjusting mechanism 3. The laser ranging module 1 is positioned above the first rail 11 of the track, enabling it to measure the distance between the first rail 11 and the bridge railings on both sides.

[0024] Step S200: Use radar module 2 to obtain the position information of the bridge railing, and adjust the height position of laser ranging module 1 according to the position information so that laser ranging module 1 can detect the bridge railing for ranging.

[0025] Specifically, the radar module 2 can scan the outline of the bridge railing from a wide angle and long distance in real time, and identify the position of the bridge railing through point cloud data. The position information of the bridge railing is fed back to the data processing unit 8. The data processing unit 8 controls the adjustment mechanism 3 to adjust the height position of the laser ranging module 1 according to its position information, so that the laser ranging module 1 can detect the bridge railing and ensure that the laser ranging module 1 can measure the distance between itself and the bridge railing.

[0026] Step S300: The laser ranging module 1 is used to simultaneously measure the distance between the first rail 11 and the bridge railings on both sides. The eccentricity is calculated based on the distance parameters measured by the laser ranging module 1 and the track gauge.

[0027] Specifically, the laser ranging module 1 is used to simultaneously measure the distance between the first rail 11 and the bridge railings on both sides, and the measured distance value is fed back to the data processing unit 8. The data processing unit 8 calculates the eccentricity based on the distance parameters measured by the laser ranging module 1 and the track gauge.

[0028] It should be noted that the measurement principle of railway bridge girder eccentricity is to measure the distance from the outer edge of each of the two rails to the bridge railing on the same side, and then calculate it using a formula. Figure 3 For example, the calculation formula is: ; In the formula, E is the eccentricity, and L is the distance between the two points. 左 L is the distance between the left rail and the right bridge railing. 右 This refers to the distance between the right-side rail and the right-side bridge railing.

[0029] Based on the calculation results, a positive E value indicates that the bridge centerline is deflected to the right relative to the track centerline; a negative E value indicates that the bridge centerline is deflected to the left relative to the track centerline.

[0030] It should also be noted that the two sets of distance values ​​measured simultaneously by the laser ranging module 1 between the first rail 11 and the bridge railings on both sides include the lateral width of the rail. That is, the data processing unit 8 will subtract the corresponding rail gauge when processing the data. The standard rail gauge is 1435mm.

[0031] Step S310: The measurement method also includes using a displacement sensor 520 to measure the lateral offset of the second rail 12 of the track relative to the first rail 11, and correcting the first lateral deviation of the track gauge based on the lateral offset.

[0032] Specifically, considering the lateral spacing deviation between the two rails during installation, the flexible telescopic component 510 of the measuring device can adapt to the lateral width change of the rails. Simultaneously, the displacement sensor 520 measures the lateral displacement change of the flexible telescopic component 510, thus measuring the lateral offset of the rails. Then, the data processing unit 8 compensates for the lateral width of the rails using this lateral offset when calculating the eccentricity, thereby correcting the lateral installation error between the two rails and improving the measurement accuracy of the eccentricity.

[0033] Step S320: The measurement method also includes using an inclination sensor 7 to measure the lateral tilt angle of the track relative to the horizontal plane, and correcting the height deviation of the second rail 12 relative to the first rail 11 based on the lateral tilt angle.

[0034] Specifically, considering the vertical height deviation between the two rails during installation, which can lead to errors in lateral measurement data, the tilt sensor 7 of the measuring device can measure the lateral tilt angle caused by the height deviation of the rails during their movement, thus obtaining the lateral tilt angle of the track. Then, the data processing unit 8 further compensates for the lateral width of the track by using the lateral tilt angle when calculating the eccentricity, thereby correcting the lateral error caused by the installation height error between the two rails and further improving the measurement accuracy of the eccentricity.

[0035] Step S330: The measurement method also includes using the inertial module 6 to measure the lateral vibration of the laser ranging module 1 during its movement, and correcting the second lateral deviation of the laser ranging module 1 relative to the first rail 11 during detection based on the lateral vibration.

[0036] Specifically, considering that the measuring device will generate lateral vibration during its movement, and that this lateral vibration will affect the actual lateral position of the laser ranging module 1 during measurement, the amount of lateral vibration during the movement can be measured by the inertial module 6 of the measuring device. Then, when calculating the eccentricity, the data processing unit 8 uses the amount of lateral vibration to compensate for the lateral changes in the position of the laser ranging module 1 during its movement, thereby correcting the lateral position deviation of the laser ranging module 1 and ensuring the accuracy of the eccentricity measurement.

[0037] Step S340: Use laser ranging module 1 to measure the distances between the first rail 11 and the bridge railings on both sides, including: Measurements are performed using a first laser rangefinder 110 and a second laser rangefinder 120 that are symmetrically distributed and have opposite measurement directions. Specifically, a first laser rangefinder 110 is used to measure the first distance between the first rail 11 and the first bridge rail, and a second laser rangefinder 120 is used to measure the second distance between the first rail 11 and the second bridge rail. The first bridge rail and the first rail 11 are located on the same side of the center line of the beam.

[0038] Specifically, to ensure continuous measurement while simultaneously traveling along the length of the track, the distance between the first rail 11 and the bridge railings on both sides can be measured using a measuring device. This measurement can be performed by symmetrically distributed first laser ranging sensors 110 and second laser ranging sensors 120 with opposite measurement directions. The first laser ranging sensor 110 measures the first distance between the first rail 11 and the first bridge railing on the same side, while the second laser ranging sensor 120 measures the second distance between the first rail 11 and the second bridge railing on the other side. The first distance is less than the second distance.

[0039] It should be noted that the first laser rangefinder 110 and the second laser rangefinder 120 need to be calibrated before measurement. For example, the sensors can be calibrated using the following methods: After the moving mechanism 4 of the measuring device is locked by the lateral limiting component 450, the distance t from the second laser range sensor 120 to the right side of the second rail 12 is read simultaneously based on the positional relationship t2 between the second laser range sensor 120 and the limiting frame 451 located on the second rail 12. 02 Rotate the laser ranging module 1 by 180° so that the first laser ranging sensor 110 is facing the second rail 12 on the right. Based on the positional relationship t1 of the first laser ranging sensor 110 relative to the limiting frame 451 located on the second rail 12, read the distance t between the first laser ranging sensor 110 and the second rail 12. 01The lateral correction coefficients R1 and R2 of the first laser rangefinder 110 and the second laser rangefinder 120 are calculated and obtained. Then, the laser rangefinder module 1 is rotated 180° to reset it.

[0040] in, ; .

[0041] Step S350: The formula for calculating the eccentricity of the measurement method is: ; In the formula, E is the eccentricity, R1 is the correction coefficient of the first laser rangefinder, D1 is the first distance value, R2 is the correction coefficient of the second laser rangefinder, D2 is the second distance value, A is the lateral vibration, B is the lateral offset, D0 is the standard gauge, and α is the lateral tilt angle.

[0042] Specifically, such as Figure 2 As shown, taking the first rail 11 as the left rail as an example, the measurement of eccentricity in the measurement method is further explained: (1) Data collection: The measuring device is pushed along the track at a constant speed. The first laser rangefinder 110 and the second laser rangefinder 120 are used to measure the distance from the left rail to the left and right bridge railings in real time, and the distance is filtered to obtain the first distance value D1 and the second distance value D2. The inertial module 6 is used to measure the vibration data of the entire measuring device in real time during the pushing process. The lateral vibration A is calculated and output using a dynamic compensation algorithm. The tilt sensor 7 is used to measure the lateral tilt angle α of the entire measuring device in real time during the detection process. The lateral tilt angle α can be as follows: Figure 2 In the diagram, ∠MON and OM are horizontal reference planes, and ON is the actual plane where the track is located. The displacement sensor 520 is used to measure the lateral offset B of the entire measuring device relative to the rail in real time during the detection process.

[0043] (2) Calculation of eccentricity Calculate the distance L from the outer edge of the left rail to the left bridge guardrail. 左 : ; Calculate the distance L from the outer edge of the right-side rail to the right-side bridge railing. 右 : ; According to the theoretical formula of eccentricity The real-time offset E between the bridge centerline and the track centerline is obtained: ; It should be noted that the positive or negative sign of the calculated offset distance corresponds to whether the bridge centerline deviates to the right or left relative to the track centerline. Left deviation is indicated by "-", and right deviation by "+".

[0044] Step S400: Output a curve based on the measured eccentricity and the mileage information of the laser ranging module 1 traveling along the track.

[0045] Specifically, the data processing unit 8 combines the measured eccentricity and the mileage information of the laser ranging module 1 along the track to generate a "mileage-eccentricity" curve and form a detection report.

[0046] For example, the actual eccentricity of the bridge section from 146,500m to 146,600m, measured using the above method, is compared with the original design value using mileage information to form Table 1 below and output as shown. Figure 7 The curve graph.

[0047] Table 1. Eccentricity of the bridge section from 146500m to 146600m

[0048] In summary, the method for measuring the eccentricity of railway bridge beams utilizes radar module 2 to capture the position information of the bridge railing and rapidly adjust the height of laser ranging module 1. This allows laser ranging module 1 to automatically and continuously measure the eccentricity along the track as it travels. This replaces manual measurement and reading, enabling continuous measurement along the track to obtain the overall offset trend of the beam, thereby improving measurement accuracy, efficiency, and operational safety.

[0049] Example 2 This invention also provides a measuring device for the eccentricity of railway bridge beams. This measuring device is applied to the method for measuring the eccentricity of railway bridge beams as described in Example 1. Figures 4 to 6 As shown, the measuring device includes at least a moving mechanism 4, an adjusting mechanism 3, a radar module 2, and a laser ranging module 1.

[0050] The moving mechanism 4 is mounted on the track and moves along the track length. A measuring rod 410 is installed on the first rail 11 of the track corresponding to the moving mechanism 4. An adjusting mechanism 3 is mounted on the measuring rod 410 and can be adjusted along the measuring rod 410. A radar module 2 is installed on the top of the measuring rod 410 and is used to acquire the position information of the bridge railing. A laser ranging module 1 is mounted on the adjusting mechanism 3 and is used to measure the distance between the first rail 11 and the bridge railings on both sides.

[0051] Specifically, the moving mechanism 4 can move on the track by hand or by motor 321. The radar module 2 and laser ranging module 1 are mounted and supported by the measuring rod 410, so that the radar module 2 can perceive the position of the bridge railing from a long distance with a wide field of view. The height of the laser ranging module 1 can be adjusted by the adjusting mechanism 3, so that the laser ranging module 1 can measure the distance between the first rail 11 and the bridge railings on both sides, thereby realizing continuous automated measurement.

[0052] More specifically, the mobile mechanism 4 can be T-shaped, and may include a first car body 420 spanning two rails and a second car body 430 arranged along the rail direction, with running wheels 440 cooperating with the rails installed under both the first car body 420 and the second car body 430. The radar module 2 may be a lidar.

[0053] In one example, the laser ranging module 1 includes a first laser ranging sensor 110 and a second laser ranging sensor 120. The first laser ranging sensor 110 and the second laser ranging sensor 120 are symmetrically distributed on both sides of the measuring rod 410, and their measuring directions are opposite.

[0054] Specifically, the first laser rangefinder 110 and the second laser rangefinder 120 are symmetrically mounted on both sides of the measuring rod 410 via the mounting housing 130, and the measuring directions of the first laser rangefinder 110 and the second laser rangefinder 120 are opposite and both perpendicular to the length direction of the track. The mounting housing 130 can be rotated relative to the measuring rod 410 via the adjustment mechanism 3, and the rotation adjustment angle can be 180°.

[0055] In one example, the adjustment mechanism 3 includes an adjustment component 310 and a drive component 320. The adjustment component 310 is movably mounted on the measuring rod 410. The adjustment component 310 is used to mount the laser ranging module 1. The drive component 320 is used to drive the adjustment component 310 to move and adjust along the measuring rod 410.

[0056] Furthermore, the drive assembly 320 may include a motor 321 and a drive rod 322, and the adjustment assembly 310 may include an inner adjustment block 311 and an outer housing 312, wherein the adjustment block 311 is rotatable relative to the housing 312. The housing 312 is located below the mounting shell 130, and the adjustment block 311 is located within the housing 312, such that the adjustment block 311 is fitted onto the measuring rod 410. The adjustment block 311 has an internal thread that engages with the external thread of the measuring rod 410. The drive rod 322 meshes with the adjustment block 311 for transmission, and one end of the drive rod 322 is connected to the output end of the motor 321.

[0057] When adjusting the height of the laser ranging module 1, the motor 321 drives the drive rod 322 to rotate. The drive rod 322 meshes with the external teeth on the adjusting block 311, thereby driving the adjusting block 311 to rotate. Since the housing 312 restricts the vertical direction of the adjusting block 311, the adjusting block 311 can only rotate. With the internal thread of the adjusting block 311 cooperating with the external thread of the measuring rod 410, the adjusting block 311 can move up and down along the measuring rod 410 for adjustment.

[0058] Furthermore, the drive rod 322 can be a worm gear, the adjusting block 311 can be a worm wheel nut, and the measuring rod 410 can be a threaded rod. It should be noted that, to ensure that the adjusting block 311 can drive the housing 312 to move up and down along the measuring rod 410, the upper and lower ends of the adjusting block 311 can be connected to the top and bottom ends of the housing 312 via bearings. Additionally, a rotary gear assembly (not shown in the attached figures) can be provided between the housing 312 and the mounting housing 130. This rotary gear assembly can be a conventional assembly that allows the mounting housing 130 to rotate 180° around the measuring rod 410.

[0059] In one example, the measuring device also includes a flexible telescopic mechanism 5, which includes a flexible telescopic component 510 and a displacement sensor 520.

[0060] One end of the flexible telescopic component 510 is connected to the lateral limiting component 450 of the moving mechanism 4, and the other end is connected to the displacement sensor 520. The flexible telescopic component 510 can elastically expand and contract along the lateral direction of the track to compensate for the lateral distance deviation between the two rails of the track. The displacement sensor 520 is used to measure the lateral displacement change of the flexible telescopic component 510.

[0061] Specifically, the corresponding traveling wheel 440 of the moving mechanism 4 is provided with a lateral limiting component 450. The lateral limiting component 450 can adjust the lateral position of the traveling wheel 440 laterally, so that the traveling wheel 440 always travels in a fixed position, which can prevent the moving mechanism 4 from derailing from the track due to excessive changes in the distance between the two rails of the track.

[0062] The lateral limiting assembly 450 includes a limiting frame 451 and a limiting wheel 452. The limiting frame 451 is laterally adjustable, and the limiting wheel 452 is rotatably mounted on the lower end of the limiting frame 451 near the inner side of the track. The limiting wheel 452 can travel along the inner side of the track. In this way, the lateral limiting assembly 450 can laterally limit the movement of the traveling wheel 440 while avoiding obstruction of its movement.

[0063] One end of the flexible telescopic component 510 is connected to the limiting frame 451, and the other end is connected to the measuring end of the displacement sensor 520. This allows the flexible telescopic component 510 to transmit the lateral movement changes of the lateral limiting component 450 to the displacement sensor 520, thereby enabling the displacement sensor 520 to measure the lateral width changes of the track. The flexible telescopic component 510 includes an elastic element 511, which abuts against the limiting frame 451 to ensure that the limiting wheel 452 is always in rolling contact with the inner side of the track. The flexible telescopic component 510 also includes a displacement transmission rod 512, which is used to transmit lateral displacement changes to the displacement sensor 520.

[0064] The flexible telescopic mechanism 5 also includes a switch handle 530, the middle of which is hinged to the body of the moving mechanism 4. One end of the switch handle 530 is connected to the limiting frame 451, and the other end is a free end. In this way, by manually moving the free end of the switch handle 530, the limiting frame 451 is pressed against the flexible telescopic component 510, so as to facilitate the installation of the lateral limiting component 450.

[0065] It should be noted that the flexible telescopic mechanism 5 is designed on the first car body 420 that spans the two steel rails, and its position corresponds to the traveling wheel 440 on the second steel rail 12.

[0066] In one example, the measuring device also includes an inertial module 6 mounted on the second vehicle body 430, which is used to measure the amount of lateral vibration of the laser ranging module 1 during movement.

[0067] In one example, the measuring device also includes an inclination sensor 7 mounted on the first vehicle body 420, which is used to measure the lateral tilt angle of the track.

[0068] In one example, the measuring device also includes a data processing unit 8, a mileage measurement module 9, and a display module 10 mounted on the second vehicle body 430. The mileage measurement module 9 is used for mileage measurement and counting, the data processing unit 8 is used to receive, process, and perform calculations on the data from each sensor, and the display module 10 is used to display the detection curve output by the data processing unit 8. Additionally, the measuring device can be powered by a lithium battery, which also functions as a charging device.

[0069] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for measuring the eccentricity of a railway bridge beam, characterized in that, At least the following steps are included: The laser ranging module is positioned above the first rail of the track, and moves along the length of the track. A radar module is used to acquire the location information of the bridge railing, and the height position of the laser ranging module is adjusted according to the location information so that the laser ranging module can detect the bridge railing for distance measurement. The laser ranging module is used to simultaneously measure the distance between the first rail and the bridge railings on both sides. The eccentricity is calculated based on the distance parameters measured by the laser ranging module and the track gauge. Based on the measured eccentricity and the mileage traveled by the laser ranging module along the track, a curve is output.

2. The method for measuring the eccentricity of railway bridge beams according to claim 1, characterized in that, The measurement method further includes using a displacement sensor to measure the lateral offset of the second rail of the track relative to the first rail, and correcting the first lateral deviation of the track gauge based on the lateral offset.

3. The method for measuring the eccentricity of railway bridge beams according to claim 2, characterized in that, The measurement method further includes using an inclination sensor to measure the lateral tilt angle of the track relative to the horizontal plane, and correcting the height deviation of the second rail relative to the first rail based on the lateral tilt angle.

4. The method for measuring the eccentricity of railway bridge beams according to claim 3, characterized in that, The measurement method further includes using an inertial module to measure the lateral vibration of the laser ranging module during its movement, and correcting the second lateral deviation of the laser ranging module relative to the first rail during detection based on the lateral vibration.

5. The method for measuring the eccentricity of railway bridge beams according to claim 4, characterized in that, The laser ranging module is used to measure the distances between the first rail and the bridge railings on both sides, including: Measurements are performed using a first laser rangefinder and a second laser rangefinder that are symmetrically distributed and have opposite measurement directions. Specifically, the first laser ranging sensor is used to measure the first distance between the first rail and the first bridge rail, and the second laser ranging sensor is used to measure the second distance between the first rail and the second bridge rail. The first bridge rail and the first rail are located on the same side of the center line of the beam.

6. The method for measuring the eccentricity of railway bridge beams according to claim 5, characterized in that, The formula for calculating the eccentricity in the measurement method is as follows: ； In the formula, E is the eccentricity, R1 is the correction coefficient of the first laser rangefinder, D1 is the first distance value, R2 is the correction coefficient of the second laser rangefinder, D2 is the second distance value, A is the lateral vibration, B is the lateral offset, D0 is the standard gauge, and α is the lateral tilt angle.

7. A measuring device for the eccentricity of a railway bridge beam, characterized in that, The measuring device is applied to the method for measuring the eccentricity of railway bridge beams as described in any one of claims 1 to 6, and the measuring device comprises at least: A moving mechanism is used to be erected on a track and move along the length of the track, and a measuring rod is provided on the moving mechanism corresponding to the first rail of the track; An adjustment mechanism is provided on the measuring rod, and the adjustment mechanism is capable of moving and adjusting along the measuring rod; A radar module, which is installed on the top of the measuring rod, is used to acquire the location information of the bridge railing; A laser ranging module is mounted on the adjustment mechanism and is used to measure the distance between the first rail and the bridge railings on both sides.

8. The measuring device for the eccentricity of railway bridge beams according to claim 7, characterized in that, The laser ranging module includes a first laser ranging sensor and a second laser ranging sensor. The first laser ranging sensor and the second laser ranging sensor are symmetrically distributed on both sides of the measuring rod, and their measuring directions are opposite.

9. The measuring device for the eccentricity of railway bridge beams according to claim 7, characterized in that, The adjustment mechanism includes an adjustment component and a drive component. The adjustment component is movably mounted on the measuring rod and is used to mount the laser ranging module. The drive component is used to drive the adjustment component to move and adjust along the measuring rod.

10. The measuring device for the eccentricity of railway bridge beams according to claim 7, characterized in that, The measuring device also includes a flexible telescopic mechanism, which includes a flexible telescopic component and a displacement sensor. One end of the flexible telescopic component is connected to the lateral limiting component of the moving mechanism, and the other end is connected to the displacement sensor; the flexible telescopic component can elastically expand and contract along the lateral direction of the track to compensate for the lateral distance deviation between the two rails of the track; the displacement sensor is used to measure the lateral displacement change of the flexible telescopic component.

Images