Non-contact track measurement module based on 3D high-speed camera and use method

Abstract

This invention relates to the field of track inspection technology, specifically to a non-contact track measurement module based on a 3D high-speed camera and its usage method. The module includes a drive module, a platform module located behind the drive module, a battery module located above the platform module, a control and measurement module located above the drive module, and a focusing platform located in front of the drive module. The advantages are: by designing a track inspection trolley composed of the drive module, platform module, battery module, and control and measurement module, it automatically moves to inspect track dimensions and irregularities. Furthermore, two sets of cameras (Camera 1 and Camera 2) are mounted on the control and measurement module, working in conjunction with a focusing plate and infrared supplementary lighting below the focusing platform. During the movement of the inspection trolley, images of track components such as sleeper fasteners are recorded and transmitted in real time, allowing for a direct visualization of problems such as sleeper cracks, loose fasteners, and broken or missing fasteners, thus improving inspection efficiency.

Description

Technical Field

[0001] This invention belongs to the field of track detection technology, specifically relating to a non-contact track measurement module based on a 3D high-speed camera and its usage method. Background Technology

[0002] Railway track equipment is the foundation of the railway transportation industry. Exposed to nature year-round, it endures wind, rain, freeze-thaw cycles, and train loads. The track's geometry constantly changes, the roadbed and ballast deform, and the rails, connecting parts, and sleepers wear down continuously, causing the technical condition of the track equipment to change constantly. Therefore, it is crucial for the engineering department to understand the changing patterns of track equipment, promptly monitor the track's condition, and strengthen track inspection and management to ensure track quality. Currently, the main tool for railway track inspection is the track inspection vehicle, which can detect track dimensions and irregularities, and assess track quality. However, specific damage to track components, such as cracked sleepers, loose fasteners, and broken or missing fasteners, still requires manual on-site inspection. There are no visually-based automatic inspection vehicles yet. Manual inspection is not only labor-intensive and time-consuming, but also prone to omissions.

[0003] A Chinese patent document with publication number CN106400627A proposes an automatic control track measuring trolley and track measuring method. This method solves the aforementioned technical problems by installing a measuring device below the trolley frame and a prism rotating via a prism rotation motor above the frame. A centralized controller is connected to a meter counter, the prism rotation motor, a start / stop relay, and a control setting unit. Data is input into the centralized controller to control the trolley to move slowly forward. A total station is set up to measure the three-dimensional coordinates of the station and connect to a mobile terminal. The trolley is controlled to decelerate first, then stops at the point to be measured for coarse aiming. The prism is rotated, and the total station automatically observes the prism, transmitting the obtained three-dimensional position coordinates of the prism center to the mobile terminal. However, this method requires the total station to perform static observation and must always be able to see the prism, making it prone to missed detections when navigating curves or tunnels.

[0004] Therefore, this invention proposes a non-contact track measurement module and its usage method based on a 3D high-speed camera. This solves the problem that existing technologies using total stations to automatically observe track conditions through prisms are prone to missing detections when passing through curves and tunnels. By integrating a 3D high-speed camera on an inspection trolley, the module can scan the track surface at high speed, and the image sensor records information in real time. This not only detects the track's geometric dimensions but also provides a direct display of the condition of other components such as sleepers and fasteners, improving the efficiency of track inspection and avoiding missed detections. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a non-contact track measurement module based on a 3D high-speed camera and a method of using it, so as to solve the problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a non-contact track measurement module based on a 3D high-speed camera, including a drive module, a platform module disposed behind the drive module, a battery module disposed above the platform module, a control and measurement module disposed above the drive module, and a focusing platform disposed in front of the drive module.

[0007] Preferably, the focusing platform is fixedly installed on the front surface of the drive module. Square measuring slots are symmetrically opened on both sides of the focusing platform. Track limit frame one and track limit frame two are symmetrically and movably installed on both sides of the two sets of square measuring slots. Buffer balls are provided on the inner side of track limit frame one and track limit frame two. A focusing plate is fixedly installed on the front side of track limit frame one and track limit frame two. Infrared supplementary lights are provided on the front side of the two sets of square measuring slots. The infrared supplementary lights are obliquely installed on the lower surface of the focusing platform.

[0008] Preferably, a linkage frame one is movably installed on one side of the track limiting frame one, and a linkage frame two is movably installed on one side of the track limiting frame two. A connecting rod one is hinged between the linkage frame one and the linkage frame two.

[0009] Preferably, a camera mounting bracket 1 is provided above the linkage bracket 1, and a camera mounting bracket 2 is provided above the linkage bracket 2. The linkage bracket 1 and the linkage bracket 2 are respectively provided with slots that are adapted to the camera mounting bracket 1 and the camera mounting bracket 2. A connecting rod 2 is hinged between the camera mounting bracket 1 and the camera mounting bracket 2.

[0010] Preferably, a light shield is fixedly mounted on the inner side of the camera mounting bracket one and the camera mounting bracket two via a bracket. The position of the light shield corresponds to the position of the focusing plate, and the side surface of the light shield is fixedly connected to the lower surface of the control and measurement module via a hollow tube.

[0011] Preferably, a camera 1 and a camera 2 are symmetrically arranged on both sides below the control and measurement module, and the camera 1 and camera 2 are respectively fixedly installed inside the light shield.

[0012] Preferably, an air intake pump is fixedly installed on the rear side of the upper surface of the focusing platform, and an air curtain pipe is fixedly installed on the rear side of the lower surface of the focusing platform. The output pipe of the air intake pump passes through the inner wall of the focusing platform and is fixedly connected to the top of the air curtain pipe. Exhaust ports are evenly distributed on the inner wall of the air curtain pipe near the square measuring groove.

[0013] Preferably, an air pump is fixedly installed on the front side of the upper surface of the focusing platform, and an air curtain pipe II is fixedly installed on the front side of the lower surface of the focusing platform. The suction pipe end of the air pump passes through the inner wall of the focusing platform and is fixedly connected to the side wall of the air curtain pipe II. The air curtain pipe II has suction ports evenly distributed on the inner wall of the side near the square measuring groove.

[0014] Preferably, the upper surface of the drive module is symmetrically provided with mounting buckles adapted to the platform module on both sides, the upper surface of the platform module is provided with mounting buckles adapted to the focusing platform, and a module mounting bracket is fixedly installed on the upper surface of the drive module. The module mounting bracket is symmetrically provided with mounting buckles adapted to the control and measurement module on both sides.

[0015] This invention also proposes a method for using a non-contact track measurement module based on a 3D high-speed camera. Step one: Assemble the inspection trolley. First, move the drive module and platform module to the track to be measured, and install the platform module on the drive module and fasten the clips to complete the installation of the bottom of the trolley. Then, install the battery module on the platform module and fasten the clips. Finally, install the control and measurement module on the module mounting bracket and fasten the clips. The overall installation of the inspection trolley is now complete. Then, connect the relevant lines, turn on the battery power, and conduct a trial run.

[0016] Step two, formal testing is carried out. A detection array consisting of one set of cameras and one set of cameras consists of two sets of cameras, which separately collect images from both sides of the left and right tracks of the trolley. A single track limit adjustment block consisting of one set of track limit frame one and one set of track limit frame two is used to dynamically adjust the position of the corresponding cameras according to the curvature of the track, so that they are always on both sides of the track to collect images.

[0017] Step 3: Output the test results. Camera 2 and Camera 1 respectively capture and record images of both sides of the two tracks and transmit them to the signal synchronous acquisition module. After acquisition and processing, the images are output to the processing and storage module through the transmission interconnection module. After analyzing and processing the image information, the test results are output, which intuitively display the problems of sleeper cracks, loose fasteners, and broken or missing fasteners.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] A track inspection trolley is designed by combining a drive module, a platform module, a battery module, and a control and measurement module. This trolley automatically moves to inspect track dimensions and for irregularities. Two cameras, Camera 1 and Camera 2, are mounted on the control and measurement module, working in conjunction with a focusing plate and infrared supplementary lighting below the focusing platform. During the trolley's movement, images of track components such as sleeper fasteners are recorded and transmitted in real time. This allows for a direct visualization of issues such as sleeper cracks, loose fasteners, and broken or missing fasteners, improving inspection efficiency. Furthermore, the coordinated use of track limit frames 1 and 2 allows for real-time calibration of the positions of Camera 1 and Camera 2 based on track curvature, ensuring that the image capture area is always on both sides of the track, achieving complete inspection of every track component. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention when it is in operation;

[0021] Figure 2 This is a top view of the overall structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the overall bottom view of the present invention;

[0023] Figure 4 This is a schematic diagram of the installation structure of the various components of the present invention;

[0024] Figure 5 This is a schematic diagram of the overall structure of the drive module and focusing platform of the present invention;

[0025] Figure 6 This is a schematic diagram of the drive module and focusing platform of the present invention viewed from below from one side.

[0026] Figure 7 This is a schematic diagram of the drive module and focusing platform of the present invention viewed from below from the other side.

[0027] Figure 8 This is a bottom view schematic diagram of the control and measurement module structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the positional relationship between the first linkage frame and the first linkage frame on a straight track according to the present invention;

[0029] Figure 10 This is a schematic diagram of the positional relationship of the first linkage frame and the first linkage frame on a curved track according to the present invention.

[0030] Figure 11 This is a schematic diagram of the usage method of the present invention.

[0031] In the diagram: 1. Drive module; 11. Module mounting bracket; 2. Platform module; 3. Battery module; 4. Control and measurement module; 41. Camera 1; 411. Camera 2; 42. Camera mounting bracket 1; 421. Camera mounting bracket 2; 422. Connecting rod 2; 43. Sunshade; 5. Focusing platform; 51. Square measuring slot; 52. Track limit bracket 1; 521. Track limit bracket 2; 53. Focusing plate; 54. Linkage bracket 1; 541. Linkage bracket 2; 542. Connecting rod 1; 55. Air pump; 551. Air curtain pipe 1; 552. Exhaust port; 56. Suction pump; 561. Air curtain pipe 2; 562. Intake port; 57. Infrared supplementary light. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] Please refer to Figures 1 to 11This invention provides a technical solution: a non-contact track measurement module based on a 3D high-speed camera, including a drive module 1, a platform module 2 disposed behind the drive module 1, a battery module 3 disposed above the platform module 2, a control and measurement module 4 disposed above the drive module 1, and a focusing platform 5 disposed in front of the drive module 1. The upper surface of the drive module 1 has symmetrical mounting clips adapted to the platform module 2 on both sides, and the upper surface of the platform module 2 has mounting clips adapted to the focusing platform 5. A module mounting bracket 11 is fixedly installed on the upper surface of 1. The two sides of the module mounting bracket 11 are symmetrically provided with mounting buckles that are compatible with the control and measurement module 4. All the mounting buckles have the same structure and are installed by rotating through the central rotating shaft. The buckles can be rotated and moved. The specific working principle is that by holding the lower end of the buckle and pulling it upward, the buckle as a whole rotates outward by 60° around the rotating shaft, and the buckle makes room for the installation channel. After the connected part is installed in place, the buckle is rotated in the opposite direction; the upper end of the buckle contacts the edge of the groove of the connected part, generating pressure to achieve the purpose of locking and fixing.

[0036] In this embodiment, a drive wheel assembly, a drive motor assembly, and a brake assembly are installed at the bottom of the drive module 1. A foot-operated brake control valve and a speed control valve are provided on the top of the drive module 1, which are connected to the brake assembly and the drive motor assembly, respectively, for moving and stopping the drive module 1. This is a known technology. Platform module 2 is installed on drive module 1 and the clips are engaged, completing the bottom installation of the trolley. Driven wheel assemblies are installed at the rear of platform module 2. Then, battery module 3 is installed on platform module 2 and the clips are engaged. A double seat is installed above the battery box of battery module 3 for easy driving by the testing personnel. Finally, control and measurement module 4 is installed on module mounting bracket 11 and the clips are engaged, completing the overall installation of the testing trolley. Then, the relevant wiring is connected. Specifically, the battery power supply cable plug is connected to the power input female connectors of the drive module, platform module, and control and measurement module, respectively. The battery provides power to the drive module, platform module, and control and measurement module. The communication control cable plug of the control and measurement module is connected to the control cable female connectors of the drive module and platform module, respectively, to achieve control and measurement. The module controls the drive module and platform module, and can read vehicle speed, mileage, and braking status. After turning on the battery power switch, a trial run is performed. Once the image signal output is correct, the track can be inspected. It should be noted that the control and measurement module 4 also has a signal synchronization acquisition module, a transmission interconnection module, a processing and storage module, and a display module. The signal synchronization acquisition module mainly includes components such as image sensors, encoders, and signal distribution boxes; the processing and storage module mainly includes an industrial control computer, a GPU processor, and related software. Camera 2 411 and Camera 1 41 can be high-speed 3D line laser cameras with a resolution of 2560*1024 and 8000 frames per second, and incorporate FPGA computing power. The high-speed 3D line laser camera adopts the 3D line laser triangulation principle, and its core light source is a line laser with a laser wavelength of 808 nm. The specific workflow is as follows: Camera 2 (411) and Camera 1 (41) respectively capture and record images of both sides of the two tracks and transmit them to the signal synchronous acquisition module. After acquisition and processing, the images are output to the processing and storage module through the transmission interconnection module. After the image information is analyzed by the software, the detection results are output, realizing the scanning of the track at a speed of 10 to 15 km / h with a sampling interval of 0.25 m, and completing the image acquisition and measurement of the track and fasteners in a non-contact manner.

[0037] Example 2

[0038] Please refer to Figures 8 to 10Based on Embodiment 1, in order to ensure that cameras 411 and 411 remain on both sides of the track when the trolley passes through a curved track to avoid missed detection, this embodiment further proposes that the focusing platform 5 is fixedly installed on the front surface of the drive module 1. Square measuring slots 51 are symmetrically provided on both sides of the focusing platform 5. Track limit frames 521 and 5212 are symmetrically and movably installed on both sides of the two sets of square measuring slots 51. Buffer balls are provided on the inner sides of both track limit frames 521 and 5212. A focusing plate 53 is fixedly installed on the front side of both track limit frames 521 and 5212. Infrared supplementary lights 57 are provided on the front side of both sets of square measuring slots 51. The infrared supplementary lights 57 are obliquely installed on the lower surface of the focusing platform 5. A linkage frame 541 is movably installed on one side of track limit frame 521, and a linkage frame 5412 is hinged to one side of track limit frame 521. A connecting rod 542 is movably installed between the first linkage frame 54 and the second linkage frame 541. A camera mounting bracket 42 is set above the first linkage frame 54, and a camera mounting bracket 421 is set above the second linkage frame 541. The first linkage frame 54 and the second linkage frame 541 are respectively provided with slots that are compatible with the first camera mounting bracket 42 and the second camera mounting bracket 421. A connecting rod 422 is hinged between the first camera mounting bracket 42 and the second camera mounting bracket 421. A light shield 43 is fixedly installed on the inner side of the first camera mounting bracket 42 and the second camera mounting bracket 421 through a bracket. The position of the light shield 43 corresponds to the position of the focusing plate 53. The side surface of the light shield 43 is fixedly connected to the lower surface of the control and measurement module 4 through a hollow tube. A camera 41 and a camera 411 are symmetrically arranged on both sides of the lower part of the control and measurement module 4. The first camera 41 and the second camera 411 are respectively fixedly installed inside the light shield 43.

[0039] In this embodiment, it should be noted that two sets of cameras 41 and 411 are respectively provided. One set of cameras 41 and the other set of cameras 411 form a detection array, which separately acquires images of both sides of the left and right tracks of the trolley. Two sets of track limiting frames 52 and 521 are also designed. One set of track limiting frames 52 and 521 forms a single track limiting adjustment block. The focusing mechanism is installed on the front side of track limiting frame 521 and track limiting frame 52. Plate 53 is a transparent optical plate, facilitating automatic focus adjustment for both camera 41 and camera 411. The focusing plate 53 and the lens hood 43 are symmetrically positioned vertically. The lens hood 43 primarily reduces stray light and reflection interference. It is fixed to the control and measurement module 4 via a hollow tube, which is a flexible, rotatable metal tube. Internal wiring allows connection of camera 41 and camera 411 to the image sensors. Under normal straight-track operation, the track limit frame 52 and... Track limiting bracket 2 521 is located on both sides of the track. Linkage bracket 1 54 and linkage bracket 2 541 are in a parallel state. Camera mounting bracket 1 42 and camera mounting bracket 2 421 are initially engaged with linkage bracket 1 54 and linkage bracket 2 541, respectively. At this time, cameras 1 41 and 2 411 inside the light shield 43 maintain parallel operation and collect image information from both sides of the track. Roller assemblies are bolted to the inner sides of track limiting bracket 1 52 and track limiting bracket 2 521. When traversing curved tracks, the track limiting brackets... The rollers installed on the inner side of track limit frame 521 will contact the side of the track. According to the curvature of the track, track limit frame 521 will deflect accordingly. Through linkage frame 54 and linkage frame 541, camera mounting frame 421 will be adjusted synchronously, so that camera 41 and camera 411 are always on both sides of the track when the trolley passes through the curved track, and images are collected from the connecting parts on both sides of the curved track to avoid missed detection.

[0040] Example 3

[0041] Please refer to Figures 5 to 7Based on Embodiment 2, in order to reduce the impact of laser line scattering particles generated by the square measuring slot 51 on image acquisition quality during the movement of the trolley, this embodiment also proposes that an air intake pump 55 is fixedly installed on the rear side of the upper surface of the focusing platform 5, and an air curtain pipe 1 551 is fixedly installed on the rear side of the lower surface of the focusing platform 5. The output pipe of the air intake pump 55 passes through the inner wall of the focusing platform 5 and is fixedly connected to the top of the air curtain pipe 1 551. The inner wall of the air curtain pipe 1 551 near the square measuring slot 51 has exhaust ports 552 evenly distributed. An air extraction pump 56 is fixedly installed on the front side of the upper surface of the focusing platform 5, and an air curtain pipe 2 561 is fixedly installed on the front side of the lower surface of the focusing platform 5. The suction pipe end of the air extraction pump 56 passes through the inner wall of the focusing platform 5 and is fixedly connected to the side wall of the air curtain pipe 2 561. The inner wall of the air curtain pipe 2 561 near the square measuring slot 51 has suction ports 562 evenly distributed.

[0042] In this embodiment, the infrared fill light 57 is installed in front of the focusing plate 53 at a 45° angle to the direction of the car's movement, providing supplementary lighting below the focusing plate 53 to increase contrast. The first air curtain pipe 551 and the air intake 562 are symmetrically arranged on the front and rear sides of the square measuring slot 51. Gas is delivered to the first air curtain pipe 551 by the air intake pump 55 and discharged through the exhaust port 552. Then, the suction pump 56 draws in the gas through the second air curtain pipe 561 and the air intake 562. The air intake pump 55 and the suction pump 56 work in unison to form a stable air curtain below the square measuring slot 51, which can effectively reduce the influence of laser line scattering particles generated during the car's movement and improve the image acquisition quality of the first camera 41 and the second camera 411.

[0043] Example 4

[0044] Please refer to Figures 1 to 11 Based on Embodiment 3, this embodiment also proposes a method for using a non-contact track measurement module based on a 3D high-speed camera, including the following steps:

[0045] Step 1: Assemble the testing trolley. First, move the drive module 1 and platform module 2 to the track to be measured, and install the platform module 2 on the drive module 1 and fasten the clips to complete the bottom installation of the trolley. Then, install the battery module 3 on the platform module 2 and fasten the clips. Finally, install the control and measurement module 4 on the module mounting bracket 11 and fasten the clips. The overall installation of the testing trolley is now complete. Then, connect the relevant lines, turn on the battery power, and conduct a trial run.

[0046] Step two: Formal testing is carried out. A detection array consisting of a set of cameras 41 and a set of cameras 411 collects images from both sides of the left and right tracks of the trolley. A single track limiter 52 and a set of track limiters 521 form a single track limiter adjustment block. According to the curvature of the track, the corresponding cameras 41 and 411 are dynamically adjusted to ensure that they are always on both sides of the track for image acquisition.

[0047] Step 3: Output the test results. Camera 2 411 and Camera 1 41 respectively capture and record images of both sides of the two tracks and transmit them to the signal synchronous acquisition module. After acquisition and processing, the images are output to the processing and storage module through the transmission interconnection module. After analyzing and processing the image information, the test results are output, which intuitively display the problems of sleeper cracks, loose fasteners, and broken or missing fasteners.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-contact track measurement module based on a 3D high-speed camera, comprising a driving module (1), a platform module (2) arranged behind the driving module (1), and a battery module (3) arranged above the platform module (2), characterized in that: A control and measurement module (4) is provided above the drive module (1), and a focusing platform (5) is provided in front of the drive module (1). The focusing platform (5) is fixedly installed on the front surface of the drive module (1). Square measuring slots (51) are symmetrically opened on both sides of the focusing platform (5). Track limit frame one (52) and track limit frame two (521) are symmetrically and movably installed on both sides of the two sets of square measuring slots (51). Buffer balls are provided on the inner side of both track limit frame one (52) and track limit frame two (521). A focusing plate (53) is fixedly installed on the front side of both the first positioning frame (52) and the second track limiting frame (521). An infrared supplement light (57) is respectively installed on the front side of the two sets of square measuring slots (51). The infrared supplement light (57) is installed obliquely on the lower surface of the focusing platform (5). A linkage frame (54) is movably installed on one side of the first track limiting frame (52), and a linkage frame (541) is movably installed on one side of the second track limiting frame (521). A connecting rod (542) is hinged between the first linkage frame (54) and the second linkage frame (541). ​ 2. The 3D high-speed camera based non-contact track measurement module according to claim 1, wherein: A camera mounting bracket 1 (42) is provided above the first linkage bracket (54), and a camera mounting bracket 2 (421) is provided above the second linkage bracket (541). The first linkage bracket (54) and the second linkage bracket (541) are respectively provided with slots that are compatible with the first camera mounting bracket (42) and the second camera mounting bracket (421). A connecting rod 2 (422) is hinged between the first camera mounting bracket (42) and the second camera mounting bracket (421).

3. The non-contact track measurement module based on a 3D high-speed camera according to claim 2, characterized in that: A light shield (43) is fixedly installed on the inner side of the camera mounting bracket 1 (42) and the camera mounting bracket 2 (421) by a bracket. The position of the light shield (43) corresponds to the position of the focusing plate (53). The side surface of the light shield (43) is fixedly connected to the lower surface of the control and measurement module (4) through a hollow tube.

4. The non-contact track measurement module based on a 3D high-speed camera according to claim 3, characterized in that: The control and measurement module (4) has a camera 1 (41) and a camera 2 (411) symmetrically arranged on both sides below it. The camera 1 (41) and the camera 2 (411) are respectively fixedly installed inside the light shield (43).

5. The non-contact track measurement module based on a 3D high-speed camera according to claim 1, characterized in that: An air intake pump (55) is fixedly installed on the rear side of the upper surface of the focusing platform (5), and an air curtain pipe (551) is fixedly installed on the rear side of the lower surface of the focusing platform (5). The output pipe of the air intake pump (55) passes through the inner wall of the focusing platform (5) and is fixedly connected to the top of the air curtain pipe (551). The air curtain pipe (551) has exhaust ports (552) evenly distributed on the inner wall of the side near the square measuring groove (51).

6. The non-contact track measurement module based on a 3D high-speed camera according to claim 5, characterized in that: An air pump (56) is fixedly installed on the front side of the upper surface of the focusing platform (5), and an air curtain pipe (561) is fixedly installed on the front side of the lower surface of the focusing platform (5). The suction pipe end of the air pump (56) passes through the inner wall of the focusing platform (5) and is fixedly connected to the side wall of the air curtain pipe (561). The air curtain pipe (561) has suction ports (562) evenly distributed on the inner wall of the side of the air curtain pipe (561) near the square measuring groove (51).

7. The non-contact track measurement module based on a 3D high-speed camera according to claim 1, characterized in that: The upper surface of the drive module (1) is symmetrically provided with mounting buckles adapted to the platform module (2) on both sides. The upper surface of the platform module (2) is provided with mounting buckles adapted to the focusing platform (5). The upper surface of the drive module (1) is fixedly installed with a module mounting bracket (11). The two sides of the module mounting bracket (11) are symmetrically provided with mounting buckles adapted to the control and measurement module (4).

8. A method of using a non-contact track measurement module based on a 3D high-speed camera, as described in any one of claims 1-7, characterized in that: Step 1: Assemble the testing trolley. First, move the drive module (1) and platform module (2) to the track to be measured, and install the platform module (2) on the drive module (1) and fasten the buckle to complete the bottom installation of the trolley. Then, install the battery module (3) on the platform module (2) and fasten the buckle. Finally, install the control and measurement module (4) on the module mounting bracket (11) and fasten the buckle. The overall installation of the testing trolley is now complete. Then, connect the relevant lines, turn on the battery power, and conduct a trial run. Step 2: Formal testing is carried out. A detection array consisting of a set of cameras 1 (41) and a set of cameras 2 (411) is used to collect images from both sides of the left and right tracks of the trolley. A single track limiter block consisting of a set of track limiters 1 (52) and a set of track limiters 2 (521) is used to adjust the position of the corresponding cameras 1 (41) and 2 (411) according to the bending changes of the track, so that they are always on both sides of the track for image acquisition. Step 3: Output the detection results. Camera 2 (411) and Camera 1 (41) respectively capture and record images of both sides of the two tracks and transmit them to the signal synchronization acquisition module. After acquisition and processing, the images are output to the processing and storage module through the transmission interconnection module. After the image information is analyzed and processed, the detection results are output, which intuitively show the problems of sleeper cracks, loose fasteners, and broken or missing fasteners.

Images