A seamless line rail displacement crawling vehicle-mounted detection system and detection method based on a vernier principle

Abstract

The application discloses a seamless line rail displacement crawling vehicle-mounted detection system and method based on the principle of vernier caliper, which comprises a measuring scale, a carrying platform, an imaging module and a data processing module, the measuring scale forms parallel reference systems and reference systems on the rail and one side of the rail respectively; the measuring scale forms marks on the reference systems and the reference systems for the camera unit of the imaging module to locate the mark target position to measure the crawling value of the rail. By setting the vernier scale on the rail and the main scale on one side of the rail, cooperating with the movable calibration scale assembly, and using the working principle of the vernier caliper to calibrate the positions of the main scale and the vernier scale in real time, high-precision rail crawling measurement can be realized, and the application has the outstanding advantages of simple installation, convenient use, accurate measurement, low cost and the like, and can measure the rail crawling displacement at any position on the line.

Description

Technical Field

[0001] This invention relates to the field of rail measurement technology, specifically to a vehicle-mounted detection system and method for displacement creep of seamless railway rails based on the principle of vernier calipers. Background Technology

[0002] With the rapid development of urban rail transit in my country, the tracks are susceptible to temperature and vehicle stress during operation, causing creeping displacement of the rails, which increases the risk of train operation on the tracks.

[0003] Currently, traditional methods for detecting rail creep in my country include the string line measurement method and the optical theodolite method. With increasing demands on railway inspection, laser measurement and photoelectric measurement methods have also been developed. All four of these rail displacement measurement methods, tools, and equipment are only suitable for manual single-point measurement. The string line measurement method generally only achieves an accuracy within ±5mm and requires a large workload, necessitating at least two people to perform the measurement. Optical theodolites are complex to operate and inconvenient to use.

[0004] Several methods for detecting rail crawling displacement based on machine vision have been proposed, but these methods require the installation of detection devices on both sides of the track shoulder. This method is costly and difficult to maintain manually. The detection position is relatively fixed. When measurements are needed at other locations on the line, the detection devices need to be installed repeatedly. Furthermore, there are certain risks in the installation and on-site measurement.

[0005] To address the existing rail crawling detection technology, it is urgent to improve the system's high cost and complex operation. Summary of the Invention

[0006] The purpose of this invention is to provide a vehicle-mounted detection system and method for displacement creep of seamless railway rails based on the principle of vernier calipers, so as to solve the problems of high cost and complex use in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A vehicle-mounted detection system for displacement creep of seamless railway rails based on the principle of vernier calipers includes: The measuring ruler forms a parallel reference system and a standard reference system on the rail and on one side of the rail, respectively. A transport platform is used to transport system equipment on rails and to provide power and energy to the system. An imaging module, which is mounted on the carrier platform, includes a camera unit, an illumination unit, and an imaging data acquisition unit; The data processing module is set on the carrier platform and is used for image data processing, including measuring scale recognition and measuring rail crawl value. The data is output and displayed through a data interface and can be on the same computing platform as the imaging data acquisition unit in the imaging module. The measuring ruler forms markings on a reference system and a standard system to allow the camera unit of the imaging module to locate the marked target position in order to measure the creep value of the rail.

[0008] As a preferred embodiment of the present invention, the measuring ruler includes a vernier scale, a main scale, and a calibration scale assembly; The vernier scale is mounted on the rail and oriented in the same direction as the rail. The main scale is set on one side of the rail and faces the same direction as the vernier scale. The calibration scale assembly is disposed on the main scale and is used for arbitrary displacement on the main scale and calibration with the corresponding position on the vernier scale; The measurement origins of the main scale and the vernier scale are located on the same reference plane.

[0009] As a preferred embodiment of the present invention, the calibration scale assembly includes a main scale positioning assembly, an adapter assembly, and a vernier scale positioning assembly; The main scale positioning component is used to clamp onto any position on the main scale and can form a positioning mark at the position of the clamp. The adapter component is disposed on the main scale positioning component and can be adjusted to be perpendicular to the main scale. The vernier scale positioning component is disposed at the front end of the adapter component and is used to form a positioning mark on the vernier scale.

[0010] As a preferred embodiment of the present invention, the bottom end of the main scale positioning component is provided with a slot for fitting onto the main scale, and a fixing bolt is threadedly connected to the side of the main scale positioning component away from the vernier scale. The fixing bolt can extend into the slot at the bottom end of the main scale positioning component and contact the main scale. The main scale positioning component is provided with a first marker for forming a mark on the main scale.

[0011] As a preferred embodiment of the present invention, the adapter assembly includes a rotating cylinder, a telescopic cylinder, and a first spring; The rotating cylinder is rotatably connected to the top of the main scale positioning assembly. The telescopic cylinder can slide inside the rotating cylinder. A first spring is sleeved on the outside of the telescopic cylinder, and the two ends of the first spring are elastically supported by the inside of the rotating cylinder and the outside of the telescopic cylinder, respectively, so that the telescopic cylinder tends to overlap inside the rotating cylinder. A connecting rod is movably connected to the inside of the telescopic cylinder. The front end of the connecting rod is used to connect to the vernier caliper positioning assembly. When the front end of the connecting rod is subjected to force, it can compress the first spring together with the telescopic cylinder.

[0012] As a preferred embodiment of the present invention, the vernier scale positioning assembly includes a track fixed on the connecting rod, an inner slider and a second spring are provided in the track, and a bidirectional scale for fitting against the vernier scale is rotatably connected to the inner slider. The second spring, by elastically supporting the inner slider, enables the bidirectional ruler to fully conform to the vernier scale. A second marker is provided at the center scale origin of the bidirectional ruler, and when the bidirectional ruler is attached to the vernier scale, the second marker and the first marker are located on the same reference plane.

[0013] As a preferred embodiment of the present invention, the imaging optical axis of the camera unit is oriented toward the track surface, and is used to photograph and quickly position the main scale and the vernier scale.

[0014] As a preferred embodiment of the present invention, the camera unit is selected from any one of a line scan camera, an area scan camera, or a 3D camera based on line structured light, in order to acquire track images. The 3D camera based on line structured light can simultaneously acquire pixel-aligned two-dimensional texture and three-dimensional shape data. The 3D camera based on line structured light is used to capture images of the first marker and the second marker.

[0015] As a preferred embodiment of the present invention, the imaging data acquisition unit is either an embedded system or an industrial control computer, and is connected to the camera unit through the data acquisition unit.

[0016] To address the aforementioned technical issues, a detection method for a vehicle-mounted detection system for seamless rail displacement creep based on the vernier caliper principle is further provided, comprising the following steps: Step 100: Arrange measuring rulers on the rails and track bed to form a reference system and a benchmark system on the track bed and rails respectively; move the calibration ruler assembly to the target position on the main ruler and lock it with the fixing bolts; rotate the adapter assembly to make the bidirectional ruler fit against the vernier ruler, so that the first marker and the second marker are located on the same reference plane, and establish the calibration benchmark of the main ruler and the vernier ruler on site. Step 200: Power is supplied by the transport platform and the vehicle moves on the rails; Step 300: The imaging module takes a picture of the measuring ruler to acquire data and uploads it to the data processing module; Step 400: The data processing module calculates the rail creep value based on the uploaded data.

[0017] Compared with the prior art, the present invention has the following advantages: This invention achieves high-precision rail creep measurement by setting a vernier caliper on the rail and a main caliper on one side of the rail, and calibrating the main caliper with the vernier caliper at any position using a calibration caliper assembly. When the rail creeps and causes displacement, the working principle of the vernier caliper is used to compare the real-time calibrated positions of the main caliper and the vernier caliper. It has outstanding advantages such as simple installation, convenient use, accurate measurement, and low cost, and can measure the amount of rail creep displacement at any position on the track. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 A schematic diagram of the reference system and the benchmark system is provided for this invention.

[0020] Figure 2 A schematic diagram of the measuring ruler as a whole is provided for the present invention.

[0021] Figure 3 A side sectional view of the adapter assembly is provided for this invention.

[0022] Figure 4 A top view of the vernier caliper positioning component is provided for this invention.

[0023] The labels in the diagram represent the following: 1-Vernier scale; 2-Main scale; 3-Calibration scale assembly; 31-Main scale positioning assembly; 32-Adapter assembly; 33-Vernier scale positioning assembly; 311-Fixing bolt; 312-First marker; 321-Rotating cylinder; 322-Telescopic cylinder; 323-First spring; 324-Connecting rod; 331-Railway; 332-Inner slider; 333-Second spring; 334-Double ruler; 335-Second marker. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on 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.

[0025] like Figures 1 to 4As shown, this invention provides an on-board detection system for seamless rail displacement creep based on the vernier caliper principle, comprising: The measuring ruler forms a parallel reference system and a standard reference system on the rail and on one side of the rail, respectively. A transport platform is used to transport system equipment on rails and to provide power and energy to the system. The imaging module, which is mounted on the carrier platform, includes a camera unit, an illumination unit, and an imaging data acquisition unit; The data processing module is set on the carrier platform and is used for image data processing, including measuring scale recognition and measuring rail crawl value. It outputs and displays the data through a data interface and can be on the same computing platform as the imaging data acquisition unit in the imaging module. The measuring ruler forms markings on the reference system and the datum system so that the camera unit of the imaging module can locate the marked target position to measure the creep value of the rail.

[0026] This invention achieves high-precision rail creep measurement by setting a vernier caliper on the rail and a main scale on one side of the rail. When the rail creeps and causes displacement, the working principle of the vernier caliper is used to compare the positions of the main scale and the vernier caliper in real time. It has outstanding advantages such as simple installation, convenient use, accurate measurement, and low cost. It can measure the amount of rail creep displacement at any position on the line.

[0027] The measuring scale includes a vernier scale 1, a main scale 2, and a calibration scale assembly 3; Vernier scale 1 is set on the rail and aligns with the rail's orientation; Main scale 2 is set on one side of the rail and faces the same direction as vernier scale 1; The calibration scale assembly 3 is mounted on the main scale 2 and is used to calibrate any displacement on the main scale 2 and the corresponding position on the vernier scale 1. The measurement origins of the main scale 2 and the vernier scale 1 are located on the same reference plane.

[0028] In the initial state, the left origins of the main scale 2 and the vernier scale 1 are aligned. When the rail creeps, the vernier scale 1 set on the rail will be displaced accordingly along the direction of the rail.

[0029] The spacing between each small division on the main scale 2 is 10mm, and the spacing between each small division on the vernier scale 1 is 9mm. Therefore, vernier scale 1 has a total of 9 divisions and a total length of 90mm; The main scale 2 has 10 divisions, and its total length is 90mm. Therefore, the 10th graduation line of the main scale will align with the 9th graduation line of the vernier scale. Thus, the 10 graduations of the main scale 2 correspond to a difference of 10mm. By aligning the graduations of the main scale 2 and the vernier scale 1, a precise measurement of 1mm can be achieved.

[0030] The calibration scale assembly 3 includes a main scale positioning assembly 31, an adapter assembly 32, and a vernier scale positioning assembly 33; The main scale positioning component 31 is used to fit the clasp at any position on the main scale 2 and can form a positioning mark at the position of the clasp. The adapter component 32 is set on the main scale positioning component 31 and can be adjusted to be vertically oriented towards the vernier scale 1. The vernier scale positioning component 33 is set at the front end of the adapter component 32 and is used to form a positioning mark on the vernier scale.

[0031] The calibration ruler assembly 3 is used to calibrate the rail after it has started to creep, by fixing the calibration ruler assembly 3 at an appropriate position on the main ruler 2 and calibrating it with the vernier ruler 1 on the rail. The creep value of the rail can then be observed directly. For example, the calibration ruler assembly 3 can be marked at 90mm on the main ruler 2 and at 90mm on the vernier ruler 1. When the rail and vernier ruler 1 creep, the displacement of the original 90mm mark on the vernier ruler can be obtained by observing the calibration ruler assembly 3. The creep value of the rail can then be obtained by substituting the displacement into the total number of divisions and dividing.

[0032] The bottom end of the main scale positioning component 31 is provided with a slot for fitting onto the main scale 2. A fixing bolt 311 is threadedly connected to the side of the main scale positioning component 31 away from the vernier scale 1. The fixing bolt 311 can extend into the slot at the bottom end of the main scale positioning component 31 and contact the main scale 2. The main scale positioning component 31 is provided with a first marker 312 for forming a mark on the main scale 2.

[0033] The main scale positioning component 31 can slide on the main scale 2 and be fixed in position by fixing bolt 311, thereby adjusting its position on the main scale 2. During this operation, it is necessary to ensure that the first marker 312 is directly above the required scale on the main scale.

[0034] The adapter assembly 32 includes a rotating cylinder 321, a telescopic cylinder 322, and a first spring 323; The rotating cylinder 321 is rotatably connected to the top of the main scale positioning assembly 31. The telescopic cylinder 322 can slide inside the rotating cylinder 321. A first spring 323 is sleeved on the outside of the telescopic cylinder 322, and the two ends of the first spring 323 are elastically supported by the inside of the rotating cylinder 321 and the outside of the telescopic cylinder 322, respectively, so that the telescopic cylinder 322 tends to overlap inside the rotating cylinder 321. A connecting rod 324 is movably connected to the inside of the telescopic cylinder 322. The front end of the connecting rod 324 is used to connect to the vernier caliper positioning component 33. When the front end of the connecting rod 324 is subjected to force, it can compress the first spring 323 together with the telescopic cylinder 322.

[0035] The rotating drum 321 of the adapter assembly 32 can rotate on the main scale positioning assembly 31, thereby rotating the adapter assembly 32 and the vernier scale positioning assembly 33 toward the vernier scale 1.

[0036] The front end of the connecting rod 324 has a conventional flat structure with chamfered corners. Therefore, during the rotation of the connecting rod 324, the chamfered front end of the connecting rod 324 will first contact the vernier scale 1 and then retract slightly before the front flat structure of the connecting rod 324 makes full contact with the vernier scale 1. At this time, the front end of the connecting rod 324 will over-apply to the vernier scale 1, so that the connecting rod 324 together with the telescopic cylinder 322 slides in the rotating cylinder 321 and compresses the first spring 323. The first spring 323 releases the pressure, so that the front end of the connecting rod 324 fully abuts against the vernier scale and is not prone to tilting.

[0037] The vernier positioning assembly 33 includes a track 331 fixed on the connecting rod 324. An inner slider 332 and a second spring 333 are provided in the track 331. A bidirectional ruler 334 for fitting onto the vernier 1 is rotatably connected to the inner slider 332. Among them, the second spring 333 can make the bidirectional ruler 334 fully fit on the vernier ruler 1 by elastically supporting the inner slider 332; A second marker 335 is provided at the center scale origin of the bidirectional ruler 334. When the bidirectional ruler 334 is attached to the vernier scale 1, the second marker 335 and the first marker 312 are located on the same reference plane.

[0038] After the connecting rod 324 is in full contact with the vernier scale 1, the bidirectional scale 334 is rotated to fit against the vernier scale 1. The release of the second spring 333 allows the inner slider 332 to slide within the track 331, thereby making the bidirectional scale 334 fit fully against the vernier scale 1. At this time, the second marker 335 on the bidirectional scale 334 and the first marker 312 on the main scale positioning assembly 31 are on the same reference plane.

[0039] When the rail produces a creep value, the first marker 312 on the main scale positioning component 31 is still aligned with 90mm on the main scale 2, but the second marker 335 on the bidirectional scale 334 will have a certain gap with 90mm on the vernier scale 1, which can be read through the scale on the bidirectional scale 334.

[0040] The imaging optical axis of the camera unit is oriented towards the track surface, used to capture images and quickly position the main scale and vernier scale.

[0041] The camera unit can be selected from any one of a line scan camera, an area scan camera, or a 3D camera based on line structured light, in order to acquire orbital images. Among them, the 3D camera based on line structured light can simultaneously acquire pixel-aligned two-dimensional texture and three-dimensional shape data; Among them, a 3D camera based on line structured light is used to capture the first marker 312 and the second marker 335.

[0042] The imaging data acquisition unit can be either an embedded system or an industrial computer, and is connected to the camera unit through the data acquisition unit.

[0043] To address the aforementioned technical issues, a detection method for a vehicle-mounted detection system for seamless rail displacement creep based on the vernier caliper principle is further provided, comprising the following steps: Step 100: Arrange measuring rulers on the rails and track bed to form a reference system and a benchmark system on the track bed and rails respectively; move the calibration ruler assembly to the target position on the main ruler and lock it with the fixing bolts; rotate the adapter assembly to make the bidirectional ruler fit against the vernier ruler, so that the first marker and the second marker are located on the same reference plane, and establish the calibration benchmark of the main ruler and the vernier ruler on site. Step 200: Power is supplied by the transport platform and the vehicle moves on the rails; Step 300: The imaging module takes a picture of the measuring ruler to acquire data and uploads it to the data processing module; Step 400: The data processing module calculates the rail creep value based on the uploaded data.

[0044] This system allows for arbitrary setting of rail displacement and creep along the track. The observation and detection point is a high-precision detection system. The system consists of a transport platform, an imaging module, a data processing module, and a measuring scale. The transport platform uses a manned robot. This module ensures that the entire detection system can operate normally on the track and provides power to the other modules for normal operation. The camera unit in the imaging module uses a line scan camera. The data acquisition and data processing modules are both industrial control computers.

[0045] The data processing module and imaging module read images, and the image processing measurement process for rail crawling is as follows: S100. Extract the main scale image and vernier scale image, and create NCC matching templates and shape matching templates for the main scale and vernier scale respectively; S200: Read the orbital image output by the imaging module, use the target NCC model to detect the target, and proceed to the next step only after two markers are detected; otherwise, exit and read the next image output by the imaging module. S300. After detecting the detection mark, use the NCC template to perform coarse positioning of the main scale and vernier scale. After matching the two scales, use shapeModel for precise positioning. S400. Extract the ROI region of the entire image using the ruler, use BLOB analysis to extract the corresponding marker points, and determine the direction based on the ruler marker points. S500. Based on the BLOB analysis results, find the cell position corresponding to each scale, set the measuring caliper at the edge of each cell, measure the image position parameters corresponding to each cell of the vernier scale and the main scale, and store them in an array. Detect the cell edge coordinate values ​​spRi and mpRi in the vernier scale and the main scale, i=0,1,...,9; S600. Compare the data of each cell on the vernier scale and the main scale, find the difference value at the corresponding position in the array, and find the minimum value of the difference array disi. The position of the minimum value is the rail crawl value dis.

[0046] disi=spRi-mpRi; dis = argmin(disi) Here, argmin is used to find the minimum value in disi. For example, in the difference array disi=[-2, -1, 0, 1, 2, 3, 4, 5, 6, 7], the minimum value of the array is 0. If the minimum value of the array is at index 2, then the rail creep value is 2mm.

[0047] The method described in this paper, which places the detection equipment on a track inspection vehicle, only requires placing two measuring rulers at the rail locations to be measured. Compared to existing fixed-position detection methods, this method is more flexible and accurate, and allows for the setting of any number of measurement points at any location on the track. Based on multiple data points, the creeping displacement of seamless track rails can be comprehensively evaluated. It can also adapt to various complex environments such as bridges and tunnels. Through testing with existing collected data, the measurement accuracy is ±1mm.

[0048] According to the "Labor Quota Standard for Maintenance of Conventional Railways" issued by China Railway Corporation, track displacement observation is a specialized operation, requiring 2-3 people each time, and the time to complete the inspection and recording of one observation is 5 minutes.

[0049] The data acquisition of the vehicle-mounted seamless track rail displacement creep detection device is completed under the condition that the track inspection vehicle is running at an average operating speed of 10km / h (2 people) without stopping, which greatly improves the work efficiency and can be carried out simultaneously with other track inspection operations, which helps to save labor resources.

[0050] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A vehicle-mounted detection system for displacement creep of seamless railway rails based on the principle of vernier calipers, characterized in that, include: The measuring ruler forms a parallel reference system and a standard reference system on the rail and on one side of the rail, respectively. A transport platform is used to transport system equipment on rails and to provide power and energy to the system. An imaging module, which is mounted on the carrier platform, includes a camera unit, an illumination unit, and an imaging data acquisition unit; The data processing module is set on the carrier platform and is used for image data processing, including measuring scale recognition and measuring rail crawl value. The data is output and displayed through a data interface and can be on the same computing platform as the imaging data acquisition unit in the imaging module. The measuring ruler forms markings on a reference system and a standard system to allow the camera unit of the imaging module to locate the marked target position in order to measure the creep value of the rail. The measuring scale includes a vernier scale (1), a main scale (2), and a calibration scale assembly (3); The vernier scale (1) is set on the rail and is aligned with the rail orientation; The main scale (2) is set on one side of the rail and faces the same direction as the vernier scale (1); The calibration scale assembly (3) is disposed on the main scale (2) and is used for arbitrary displacement on the main scale (2) and calibration with the corresponding position on the vernier scale (1); The measurement origins of the main scale (2) and the vernier scale (1) are located on the same reference plane; The calibration scale assembly (3) includes a main scale positioning assembly (31), an adapter assembly (32), and a vernier scale positioning assembly (33). The main scale positioning component (31) is used to fit on the main scale (2) at any position and can form a positioning mark at the position of the fitting. The adapter component (32) is set on the main scale positioning component (31) and can be adjusted to be vertically facing the main scale (2). The vernier scale positioning component (33) is set at the front end of the adapter component (32) and is used to form a positioning mark on the vernier scale (1). The bottom end of the main scale positioning component (31) is provided with a slot for fitting onto the main scale (2). A fixing bolt (311) is threadedly connected to the side of the main scale positioning component (31) away from the vernier scale (1). The fixing bolt (311) can extend into the slot at the bottom end of the main scale positioning component (31) and contact the main scale (2). The main scale positioning component (31) is provided with a first marker (312) for forming a mark on the main scale (2). The adapter assembly (32) includes a rotating cylinder (321), a telescopic cylinder (322), and a first spring (323). The rotating cylinder (321) is rotatably connected to the top of the main scale positioning assembly (31). The telescopic cylinder (322) can slide inside the rotating cylinder (321). A first spring (323) is sleeved on the outside of the telescopic cylinder (322), and the two ends of the first spring (323) are elastically supported by the inside of the rotating cylinder (321) and the outside of the telescopic cylinder (322), respectively, so that the telescopic cylinder (322) tends to overlap inside the rotating cylinder (321). A connecting rod (324) is movably connected to the inside of the telescopic cylinder (322). The front end of the connecting rod (324) is used to connect to the vernier positioning assembly (33). When the front end of the connecting rod (324) is subjected to force, it can compress the first spring (323) together with the telescopic cylinder (322). The vernier positioning assembly (33) includes a track (331) fixed on the connecting rod (324), an inner slider (332) and a second spring (333) are provided in the track (331), and a bidirectional ruler (334) for fitting on the vernier (1) is rotatably connected to the inner slider (332). The second spring (333) elastically supports the inner slider (332), enabling the bidirectional ruler (334) to fully fit against the vernier ruler (1); A second marker (335) is provided at the center scale origin of the bidirectional ruler (334). When the bidirectional ruler (334) is attached to the vernier ruler (1), the second marker (335) and the first marker (312) are located on the same reference plane.

2. The seamless rail displacement creep vehicle-mounted detection system based on the vernier caliper principle according to claim 1, characterized in that, The imaging optical axis of the camera unit is oriented towards the track surface, and is used to photograph and quickly position the main scale and the vernier scale.

3. The seamless rail displacement creep vehicle-mounted detection system based on the vernier caliper principle according to claim 1, characterized in that, The camera unit is selected from any one of a line scan camera, an area scan camera, or a 3D camera based on line structured light, in order to acquire orbital images. The 3D camera based on line structured light can simultaneously acquire pixel-aligned two-dimensional texture and three-dimensional shape data. The 3D camera based on line structured light is used to capture images of the first marker (312) and the second marker (335).

4. The seamless rail displacement creep vehicle-mounted detection system based on the vernier caliper principle according to claim 1, characterized in that, The imaging data acquisition unit can be either an embedded system or an industrial control computer, and is connected to the camera unit through the data acquisition unit.

5. A detection method for a vehicle-mounted detection system for displacement creep of seamless rail tracks based on the vernier caliper principle as described in any one of claims 1-4, characterized in that, Includes the following steps: Step 100: Arrange measuring rulers on the rails and track bed to form a reference system and a benchmark system on the track bed and rails respectively; move the calibration ruler assembly to the target position on the main ruler and lock it with the fixing bolts; rotate the adapter assembly to make the bidirectional ruler fit against the vernier ruler, so that the first marker and the second marker are located on the same reference plane, and establish the calibration benchmark of the main ruler and the vernier ruler on site. Step 200: Power is supplied by the transport platform and the vehicle moves on the rails; Step 300: The imaging module takes a picture of the measuring ruler to acquire data and uploads it to the data processing module; Step 400: The data processing module calculates the rail creep value based on the uploaded data.

Images