A rapid metro track geometry measuring device

Abstract

The utility model provides a kind of subway track geometric dimension rapid measuring device, including support plate, the upper surface of support plate is fixedly connected with fixed plate, rotationally connected with screw rod between two fixed plates, the outer surface of screw rod is threadedly connected with movable seat, the upper surface of movable seat is fixedly connected with first hydraulic telescopic rod, and the telescopic end of first hydraulic telescopic rod is fixedly connected with movable plate;Measuring instrument is fixedly connected on the upper surface of movable plate, and measuring instrument includes laser radar module, vision enhancement module and inertial measurement module.The utility model can flexibly adjust the horizontal position and height of measuring instrument, solve the problem that traditional device cannot adjust height and lead to insufficient measurement accuracy, meet the multi-dimensional measurement demand under different track scenes, and measuring instrument is set with laser radar module, vision enhancement module and inertial measurement module, meet the high-precision requirement of subway track geometric dimension measurement.

Description

Technical Field

[0001] This utility model belongs to the field of subway technology, and in particular relates to a rapid measurement device for the geometric dimensions of subway tracks. Background Technology

[0002] Subway is a type of urban rail transit system. It refers to a high-speed, high-capacity rail transit system built in cities, with trains running on fully enclosed tracks. Lines located in the central urban area are generally located in underground tunnels, while lines outside the central urban area are generally located on elevated bridges or at ground level.

[0003] For example, the utility model with authorization announcement number CN219010832U discloses a subway track measuring device. This prior art solution uses four sets of foldable support components to quickly set up on the constructed track, thus avoiding frequent support and take-up, making it convenient for staff to quickly move and position the total station. Furthermore, the total station can be slid and adjusted along the direction perpendicular to the track through a sliding table mechanism, thus facilitating high-precision all-round adjustment of the total station's position. However, the above technical solution can only facilitate the adjustment of the horizontal position of the total station, but cannot adjust its height, which can easily lead to a decrease in measurement accuracy. Utility Model Content

[0004] The purpose of this invention is to provide a rapid measurement device for the geometric dimensions of subway tracks, so as to at least solve the technical problem of low measurement accuracy of existing measurement devices.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] According to one embodiment of the present invention, a rapid measurement device for the geometric dimensions of subway tracks is provided, comprising:

[0007] A support plate has a fixed plate fixedly connected to its upper surface. A lead screw is rotatably connected between the two fixed plates. A movable seat is threadedly connected to the outer surface of the lead screw. A first hydraulic telescopic rod is fixedly connected to the upper surface of the movable seat. A movable plate is fixedly connected to the telescopic end of the first hydraulic telescopic rod.

[0008] The measuring instrument is fixedly connected to the upper surface of the movable plate. The measuring instrument includes a lidar module, a vision enhancement module, and an inertial measurement module.

[0009] The lidar module includes a track gauge measurement unit, a track height measurement unit, and a track profile measurement unit;

[0010] The vision enhancement module includes a fastener spacing measurement unit and a rail gap size measurement unit;

[0011] The inertial measurement module includes a motion trajectory correction module and a direction deviation measurement module.

[0012] Preferably, the inner wall of the fixing plate is fixedly connected with bearings, and both ends of the lead screw are connected through the two bearings;

[0013] One end of the lead screw is fixedly connected to the output end of the stepper motor;

[0014] The upper surface of the support plate has two sliding grooves, and the inner wall of each sliding groove is fixedly connected to a second hydraulic telescopic rod. The telescopic end of the second hydraulic telescopic rod is fixedly connected to a movable frame.

[0015] Two sliding blocks are fixedly connected to the outer surface of each movable frame. The outer surface of each set of sliding blocks is in contact with the inner wall of the slide groove. Four electric pulleys are fixedly connected to the inner wall of each movable frame.

[0016] Two guide rails are provided below the support plate. The upper surface of each guide rail is in contact with the outer surface of the electric pulley, and the outer surface of each guide rail is in contact with the inner wall of the movable frame.

[0017] Preferably, a protective housing is fixedly connected to the outer surface of the stepper motor;

[0018] The bottom surface of the protective box is fixedly connected to the upper surface of the support plate.

[0019] Preferably, four limiting rods are fixedly connected to one side of the two fixing plates that are close to each other;

[0020] The outer surface of each set of limit rods is in contact with the inner wall of the movable seat.

[0021] Preferably, a protective seat is fixedly connected to the outer surface of the first hydraulic telescopic rod;

[0022] The bottom surface of the protective base is fixedly connected to the upper surface of the movable base.

[0023] Preferably, a retaining ring is fixedly connected to the outer surface of the telescopic end of the first hydraulic telescopic rod;

[0024] The top end of the fixed ring is fixedly connected to the bottom surface of the movable plate.

[0025] Preferably, a dustproof shell is fixedly connected to the outer surface of each of the second hydraulic telescopic rods, and the side of the two dustproof shells that are close to each other is fixedly connected to the inner wall of the slide groove.

[0026] Compared with existing technologies, the technical effects and advantages of this utility model's rapid measurement device for subway track geometry are as follows:

[0027] First, this utility model sets up a stepper motor to drive the lead screw to rotate, which drives the movable seat to move horizontally along the limit rod. Combined with the lifting function of the first hydraulic telescopic rod, the horizontal position and height of the measuring instrument can be flexibly adjusted, which solves the problem of insufficient measurement accuracy caused by the inability to adjust the height of traditional devices. It meets the multi-dimensional measurement needs under different track scenarios. Moreover, the movable frame slides along the slide groove through the second hydraulic telescopic rod. With the guiding effect of the sliding block, it can adapt to tracks with different spacing, thus expanding the applicability of the device.

[0028] Secondly, by setting electric pulleys on the inner wall of the movable frame to roll along the guide rail, the entire device can be moved automatically along the track without manual pushing, reducing labor costs. At the same time, it ensures the stability of the movement process and avoids measurement deviations caused by manual operation. Furthermore, the coordinated work of each driving component realizes the automation of measurement position adjustment and movement, greatly shortens the measurement cycle, and improves the work efficiency of track detection.

[0029] Third, the measuring instrument of this utility model, through the setting of a lidar module, a vision enhancement module and an inertial measurement module, meets the high-precision requirements for measuring the geometric dimensions of subway tracks. Attached Figure Description

[0030] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0031] In the attached diagram:

[0032] Figure 1 This is a three-dimensional structural diagram of the overall structure of the rapid measurement device for the geometric dimensions of subway tracks according to this utility model;

[0033] Figure 2 A three-dimensional structural schematic diagram of the support plate provided by this utility model;

[0034] Figure 3 A three-dimensional structural schematic diagram of the lead screw provided by this utility model;

[0035] Figure 4 A three-dimensional structural diagram of the movable plate provided by this utility model;

[0036] Figure 5 A three-dimensional structural diagram of the movable frame provided by this utility model;

[0037] Figure 6 This is a three-dimensional structural diagram of the electric pulley provided by this utility model.

[0038] In the diagram: 1. Support plate; 2. Fixed plate; 3. Electric pulley; 4. Guide rail; 5. Movable frame; 6. Protective box; 7. Measuring instrument; 8. Stepper motor; 9. Movable plate; 10. Slide groove; 11. Limiting rod; 12. Bearing; 13. Movable seat; 14. Lead screw; 15. First hydraulic telescopic rod; 16. Protective seat; 17. Fixed ring; 18. Second hydraulic telescopic rod; 19. Dustproof shell; 20. Sliding block. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0040] Reference Figures 1-6 In one embodiment of this utility model, a rapid measurement device for the geometric dimensions of a subway track is provided, including a support plate 1. A stepper motor 8 and two fixed plates 2 are fixedly connected to the upper surface of the support plate 1. A lead screw 14 is rotatably connected between the two fixed plates 2. A movable seat 13 is threadedly connected to the outer surface of the lead screw 14. A first hydraulic telescopic rod 15 is fixedly connected to the upper surface of the movable seat 13. A movable plate 9 is fixedly connected to the telescopic end of the first hydraulic telescopic rod 15.

[0041] Specifically, in this embodiment of the present invention, a bearing 12 is fixedly connected to the inner wall of each fixing plate 2, and a lead screw 14 is fixedly connected to the inner ring of the two bearings 12; the two ends of the lead screw 14 are connected through the two bearings 12.

[0042] One end of the lead screw 14 is fixedly connected to the output end of the stepper motor 8;

[0043] In one implementation, the outer surface of the stepper motor 8 provided in this embodiment is fixedly connected to a protective box 6, and the bottom surface of the protective box 6 is fixedly connected to the upper surface of the support plate 1. The protective box 6 can facilitate the protection of the stepper motor 8 and prevent it from being damaged by external forces during use.

[0044] Furthermore, the rapid measurement device for the geometric dimensions of subway tracks provided in this embodiment also includes a measuring instrument 7, which is fixedly connected to the upper surface of the movable plate 9;

[0045] In some embodiments, the measuring instrument includes a lidar module, a vision enhancement module, and an inertial measurement module;

[0046] The lidar module acquires three-dimensional point cloud data of the track through laser scanning, which is used to calculate key dimensions of the track, including a track gauge measurement unit, a track height measurement unit, and a track cross-section profile measurement unit.

[0047] The track gauge measurement unit scans the rails and identifies feature points on the inner side of the rail head based on point cloud data, calculating the horizontal distance between the two points. The track height measurement unit scans the top surface of the rails and the surface of the sleepers, obtains the elevation of the top surface of the rails through point cloud fitting, calculates the track height in combination with the sleeper reference surface, and calculates the track superelevation by the elevation difference between the top surfaces of the left and right rails. The track profile measurement unit is used to output a complete track profile point cloud and extract cross-sectional feature dimensions such as rail wear and rail base slope.

[0048] In addition, the vision enhancement module provided in this embodiment includes a fastener spacing measurement unit and a rail gap size measurement unit;

[0049] In the fastener spacing measurement unit, an industrial camera is used to capture images of the rail fasteners. The center positions of adjacent fasteners are located through image recognition, and the actual spacing is calculated by combining the camera calibration parameters. In the rail gap size measurement unit, the width and perpendicularity of the rail gap at the rail joint are calculated by visually recognizing the edge contour.

[0050] Furthermore, the inertial measurement module provided in this embodiment includes a motion trajectory correction module and a direction deviation measurement module;

[0051] The motion trajectory correction module collects the acceleration and angular velocity of the measuring instrument in real time and calculates the motion trajectory deviation of the measuring instrument 7 to correct the spatial position of the lidar point cloud, ensuring that the track size data collected at different times are in the same coordinate system; while the direction deviation measurement module is used to calculate the direction deviation of the track centerline by combining the lateral scanning results of the lidar.

[0052] Please continue to refer to Figures 1-6 In this embodiment of the utility model, the outer surface of the output end of the stepper motor 8 is fixedly connected to the inner ring of one of the bearings 12. The outer surface of the lead screw 14 is threadedly connected to the movable seat 13. The upper surface of the movable seat 13 is fixedly connected to the first hydraulic telescopic rod 15. The two fixed plates 2 are fixedly connected to four limiting rods 11 on their adjacent sides. The outer surface of each set of limiting rods 11 is in contact with the inner wall of the movable seat 13. The position of the movable seat 13 can be restricted by the limiting rods 11 to prevent it from shifting during movement.

[0053] Furthermore, in this embodiment, the measuring instrument 7 is fixedly connected to the movable plate 9, and the movable plate 9 is fixedly connected to the telescopic end of the first hydraulic telescopic rod 15;

[0054] In addition, in this embodiment, two grooves 10 are provided on the upper surface of the support plate 1. A second hydraulic telescopic rod 18 is fixedly connected to the inner wall of each groove 10. A protective seat 16 is fixedly connected to the outer surface of the first hydraulic telescopic rod 15. The bottom surface of the protective seat 16 is fixedly connected to the upper surface of the movable seat 13. The protective seat 16 can protect the first hydraulic telescopic rod 15 and prevent it from being disturbed by external factors during operation.

[0055] Accordingly, in this embodiment, each of the telescopic ends of the second hydraulic telescopic rod 18 is fixedly connected to a movable frame 5, and each movable frame 5 is fixedly connected to two sliding blocks 20 on its outer surface. The outer surface of each set of sliding blocks 20 is in contact with the inner wall of the slide groove 10. A fixing ring 17 is fixedly connected to the outer surface of the telescopic end of the first hydraulic telescopic rod 15. The top end of the fixing ring 17 is fixedly connected to the bottom surface of the movable plate 9. Through the fixing ring 17, the connection between the first hydraulic telescopic rod 15 and the movable plate 9 can be reinforced, thereby enhancing the stability of the device.

[0056] Each movable frame 5 has four electric pulleys 3 fixedly connected to its inner wall. Two guide rails 4 are provided below the support plate 1. The upper surface of each guide rail 4 is in contact with the outer surface of the electric pulleys 3. The outer surface of each guide rail 4 is in contact with the inner wall of the movable frame 5. Each second hydraulic telescopic rod 18 has a dust cover 19 fixedly connected to its outer surface. The two dust covers 19 are fixedly connected to the inner wall of the slide groove 10 on their sides that are close to each other.

[0057] In this embodiment, the dust cover 19 can protect the second hydraulic telescopic rod 18, preventing external dust and other impurities from entering the interior of the second hydraulic telescopic rod 18 and causing a reduction in its service life.

[0058] In use, first place the entire device on the subway track area to be measured, ensuring that the movable frame 5 is above the guide rail 4. According to the actual distance of the current track, activate the second hydraulic telescopic rod 18 in the two slide grooves 10. When the second hydraulic telescopic rod 18 extends and retracts, it drives the movable frame 5 to move laterally along the slide groove 10. The sliding block 20 slides along the inner wall of the slide groove 10 to ensure that the movable frame 5 moves smoothly until the inner wall of the movable frame 5 is in close contact with the outer surface of the guide rail 4, and the lower surface of the electric pulley 3 on the inner wall of the movable frame 5 is completely in contact with the upper surface of the guide rail 4. Then close the second hydraulic telescopic rod 18, and then activate the electric pulley 3 on the inner wall of the movable frame 5. The electric pulley 3 rolls along the upper surface of the guide rail 4, driving the entire device to move smoothly along the track direction without manual pushing, reducing labor costs. The uniform speed of the electric pulley 3 can avoid device shaking caused by manual movement, ensuring the stability of subsequent measurements. When the device moves to the preset measurement point, close the electric pulley 3 and the device stops moving.

[0059] When it is necessary to adjust the horizontal position of the measuring instrument 7, the stepper motor 8 on the support plate 1 is turned on. The output end of the stepper motor 8 drives the lead screw 14 to rotate in the inner ring of the bearing 12 of the two fixed plates 2. Since the lead screw 14 is threadedly connected to the movable seat 13 and the movable seat 13 is restricted by four limit rods 11, the movable seat 13 can move laterally along the limit rods 11, which drives the first hydraulic telescopic rod 15 above and the measuring instrument 7 to move synchronously. When the measuring instrument 7 moves to the target measurement point laterally of the track, the stepper motor 8 is turned off and the movable seat 13 stops moving. When it is necessary to adjust the height of the measuring instrument 7, the first hydraulic telescopic rod 15 is started according to the measurement requirements of the track geometry. The telescopic end of the first hydraulic telescopic rod 15 drives the movable plate 9 and the measuring instrument 7 to rise and fall. When the measuring instrument 7 reaches the preset height, the first hydraulic telescopic rod 15 is turned off.

[0060] As can be seen, by adjusting the position of the measuring instrument 7, the measuring field of view is always aligned with the key parts of the rail, thereby facilitating the operation of the measuring instrument 7 to measure the track geometry (such as gauge, horizontal deviation, and vertical deviation) at the current position.

[0061] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rapid measurement device for the geometric dimensions of subway tracks, characterized in that, include: A support plate (1) is fixedly connected to a fixed plate (2) on its upper surface. A lead screw (14) is rotatably connected between the two fixed plates (2). A movable seat (13) is threadedly connected to the outer surface of the lead screw (14). A first hydraulic telescopic rod (15) is fixedly connected to the upper surface of the movable seat (13). A movable plate (9) is fixedly connected to the telescopic end of the first hydraulic telescopic rod (15). Measuring instrument (7) is fixedly connected to the upper surface of movable plate (9). Measuring instrument (7) includes a lidar module, a vision enhancement module and an inertial measurement module. The lidar module includes a track gauge measurement unit, a track height measurement unit, and a track profile measurement unit; The vision enhancement module includes a fastener spacing measurement unit and a rail gap size measurement unit; The inertial measurement module includes a motion trajectory correction module and a direction deviation measurement module.

2. The rapid measurement device for the geometric dimensions of subway tracks according to claim 1, characterized in that, The inner wall of the fixed plate (2) is fixedly connected with a bearing (12), and the two ends of the lead screw (14) are connected through the two bearings (12); One end of the lead screw (14) is fixedly connected to the output end of the stepper motor (8); The upper surface of the support plate (1) has two grooves (10), and the inner wall of each groove (10) is fixedly connected to a second hydraulic telescopic rod (18), and the telescopic end of the second hydraulic telescopic rod (18) is fixedly connected to a movable frame (5). Two sliding blocks (20) are fixedly connected to the outer surface of each movable frame (5). The outer surface of each set of sliding blocks (20) is in contact with the inner wall of the slide groove (10). Four electric pulleys (3) are fixedly connected to the inner wall of each movable frame (5). Two guide rails (4) are provided below the support plate (1). The upper surface of each guide rail (4) is in contact with the outer surface of the electric pulley (3), and the outer surface of each guide rail (4) is in contact with the inner wall of the movable frame (5).

3. The rapid measurement device for the geometric dimensions of subway tracks according to claim 2, characterized in that, The outer surface of the stepper motor (8) is fixedly connected to a protective box (6); The bottom surface of the protective box (6) is fixedly connected to the upper surface of the support plate (1).

4. The rapid measurement device for the geometric dimensions of subway tracks according to claim 3, characterized in that, Four limiting rods (11) are fixedly connected to one side of the two fixed plates (2) that are close to each other; The outer surface of each set of limit rods (11) is in contact with the inner wall of the movable seat (13).

5. A rapid measurement device for the geometric dimensions of subway tracks according to claim 4, characterized in that, A protective seat (16) is fixedly connected to the outer surface of the first hydraulic telescopic rod (15); The bottom surface of the protective seat (16) is fixedly connected to the upper surface of the movable seat (13).

6. A rapid measurement device for the geometric dimensions of subway tracks according to claim 5, characterized in that, A fixing ring (17) is fixedly connected to the outer surface of the telescopic end of the first hydraulic telescopic rod (15); The top end of the fixed ring (17) is fixedly connected to the bottom surface of the movable plate (9).

7. A rapid measurement device for the geometric dimensions of subway tracks according to claim 6, characterized in that, Each of the second hydraulic telescopic rods (18) has a dust cover (19) fixedly connected to its outer surface, and the two dust covers (19) are fixedly connected to the inner wall of the slide groove (10) on their side closest to each other.

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