Rail profile detection method, system and storage medium

Abstract

The embodiment of the present application provides a rail profile detection method, the method comprises the following steps: selecting two one-dimensional sensors, and setting the moving route of the two one-dimensional sensors; moving the two one-dimensional sensors along the moving route, and the two one-dimensional sensors perform synchronous data collection in the moving process, wherein one one-dimensional sensor collects depth information of the current position from the rail surface, and the other one-dimensional sensor collects displacement information of the current position from the starting point; and obtaining profile data according to the depth information and the displacement information. By using the rail profile detection method provided in the embodiment of the present application, the detection of the rail profile is realized by combining the measurement of the depth information and the displacement information through two high-precision and low-cost one-dimensional sensors, so that the detection precision is effectively improved and the detection cost is reduced.

Description

Technical Field

[0001] This application relates to the field of railway track inspection, and in particular to a method, system and storage medium for rail profile inspection. Background Technology

[0002] Currently, rail profile inspection mainly includes two types: contact and non-contact. Contact inspection is further divided into mechanical wear gauges and electronic measuring instruments. Non-contact inspection methods are mainly based on optical inspection technology to collect rail profile data, and are mainly divided into vehicle-mounted and portable inspection methods.

[0003] Contact-based inspection methods can achieve a high level of accuracy because the inspection equipment needs to be in close contact with the rail surface. However, low inspection efficiency and easy equipment wear are unavoidable drawbacks of contact-based inspection, especially prominent in traditional wear gauge inspection methods. Contact-based inspection methods are characterized by high inspection accuracy and portability, making them suitable for scenarios involving small-scale sampling inspections.

[0004] Non-contact inspection methods primarily rely on optical inspection technology, enabling dynamic non-contact inspection and significantly improving inspection efficiency. In vehicle-mounted inspection, harsh environmental conditions cause a decrease in actual inspection accuracy compared to theoretical accuracy. In non-vehicle-mounted inspection, most environmental interference is effectively avoided, improving accuracy. However, optical inspection equipment is relatively expensive. Summary of the Invention

[0005] To address the aforementioned technical and application deficiencies, this application provides a rail profile detection method, system, and storage medium.

[0006] According to a first aspect of the embodiments of this application, a method for detecting rail profile is provided, the method comprising:

[0007] Select two one-dimensional sensors and set the movement paths of the two one-dimensional sensors;

[0008] The two one-dimensional sensors are moved along the moving route. During the movement, the two one-dimensional sensors collect data synchronously. One one-dimensional sensor collects the depth information of the current position from the rail surface, and the other one-dimensional sensor collects the displacement information of the current position from the starting point.

[0009] Profile data is obtained based on the depth and displacement information.

[0010] According to a second aspect of the embodiments of this application, a rail profile detection system is provided, the system including a depth measurement module, a reference measurement module, a follow-up drive module, and a central processing module;

[0011] The depth measurement module includes a one-dimensional sensor for detecting the depth information of the current position from the rail surface;

[0012] The reference measurement module includes a one-dimensional sensor for detecting displacement information of the current position from the starting point;

[0013] The follow-up drive module is used to control the depth measurement module and the reference measurement module to move synchronously and collect data on a set moving route;

[0014] The central processing module includes:

[0015] Memory;

[0016] Processor; and

[0017] Computer programs;

[0018] The computer program is stored in the memory and configured to be executed by the processor to implement the method as described in the first aspect of the embodiments of this application.

[0019] According to a third aspect of the present application, a computer-readable storage medium is provided having a computer program stored thereon; the computer program is executed by a processor to implement the method described in the first aspect of the present application.

[0020] The rail profile detection method provided in this application embodiment detects the rail profile by combining two high-precision, low-cost one-dimensional sensors to measure depth and displacement information, which effectively improves detection accuracy and reduces detection cost. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a flowchart illustrating a rail profile detection method provided in Embodiment 1 of this application;

[0023] Figure 2 This is a schematic diagram illustrating the principle of a rail profile detection method provided in Embodiment 1 of this application;

[0024] Figure 3 A schematic diagram illustrating the principle of a rail profile detection method comprising multiple reference measurement modules and a depth measurement module, provided in Embodiment 1 of this application;

[0025] Figure 4This is a schematic diagram of a rail profile detection system provided in Embodiment 2 of this application;

[0026] Figure 5 This is a schematic diagram showing the position of the fitting fixture provided in Embodiment 2 of this application.

[0027] Figure label:

[0028] 1. Rail, 2. Baseline measurement module and depth measurement module, 3. Movement route, 4. Depth distance, 6. Fitting fixture. Detailed Implementation

[0029] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0030] Example 1

[0031] like Figure 1 As shown, this embodiment provides a method for detecting the profile of a rail, the method including:

[0032] S101. Select two one-dimensional sensors and set the movement routes of the two one-dimensional sensors.

[0033] S102. Move the two one-dimensional sensors along the moving route. During the movement, the two one-dimensional sensors collect data synchronously. One one-dimensional sensor collects the depth information of the current position from the rail surface, and the other one-dimensional sensor collects the displacement information of the current position from the starting point.

[0034] S103. Obtain profile data based on the depth information and displacement information.

[0035] Specifically, in this embodiment, depth information can be achieved using a depth measurement module capable of detecting distance parameters, such as a point laser rangefinder. Of course, other one-dimensional sensors capable of effectively measuring the distance between the current position and the rail surface can also be used; this embodiment does not impose any special limitations. Displacement information can be achieved using a reference measurement module capable of detecting displacement parameters, such as a grating ruler rangefinder. Of course, other one-dimensional sensors capable of effectively measuring the displacement between the current position and the starting position can also be used; this embodiment does not impose any special limitations.

[0036] like Figure 2As shown, in practical applications, the method proposed in this embodiment can first determine whether the depth measurement module and the reference measurement module have started successfully. If the startup fails, the detection process is interrupted. After successful startup, the depth measurement module and the reference measurement module are driven to move synchronously along a pre-set moving route, and during the movement, the depth information of the same position relative to the surface of rail 1 and the displacement information relative to the starting point are detected. The data measured by the depth measurement module is the depth distance Ri from the current position along the measurement direction to the surface of rail 1. The data measured by the reference measurement module is the displacement Li of the current position relative to the starting point. The data collected by the depth measurement module and the reference measurement module are organized to obtain the data point set Ui={L1R1,L2R2,…LiRi}, where i=1,2,3…n. At the same time, as Figure 2 As shown, there is an angle θ between the moving route 3 of the reference measurement module and the depth measurement module 2 and the measurement direction (i.e., depth distance 4) of the depth measurement module.

[0037] Based on the obtained data point set Ui = {L1R1, L2R2, ..., LiRi}, a reference coordinate system is set according to the actual sensor deployment. Then, Ui is transformed and calculated according to the reference coordinate system to obtain the two-dimensional coordinate data point set Wi of the rail profile cross-section.

[0038] Furthermore, the method proposed in this embodiment also includes:

[0039] The two one-dimensional sensors are used in a multi-angle combination to collect data from the same cross-section of the rail. The data collection range covers the entire cross-section of the rail. The data collection line segments of each angle combination are calibrated and spliced ​​on the same plane to obtain profile data.

[0040] Specifically, in this embodiment, the two-dimensional coordinate data point set Wi of the rail profile cross-section consists of spatial coordinates x and y. Generally, to complete the full-section inspection of a rail, using only one set of reference measurement modules and depth measurement modules is insufficient for comprehensive coverage. Therefore, when more comprehensive profile segment data needs to be detected, the coverage segment length of the reference measurement modules needs to be increased. For example, using longer reference measurement modules or using multi-shaped reference measurement modules to increase the coverage area, or using more depth measurement modules arranged at certain angles to achieve a larger coverage range, such as... Figure 3 As shown. After calibration and splicing, multiple sets of two-dimensional coordinate data points Wi of the rail profile can be combined and spliced ​​to obtain more complete profile data, thereby realizing full-section rail profile measurement.

[0041] Furthermore, after obtaining the profile data, this embodiment can also obtain wear data through comparison. Specifically, a standard profile model is invoked, and the detected profile data is matched and compared with a standard comparison model, thereby measuring data such as wear volume, vertical wear, and lateral wear at various measurement angles. Simultaneously, the profile data and wear data can be displayed and stored on a monitor, giving the data higher usability and visualization attributes.

[0042] Example 2

[0043] Corresponding to Embodiment 1, this embodiment proposes a rail profile detection system, such as... Figure 4 As shown, the system includes a depth measurement module, a reference measurement module, a servo drive module, and a central processing module;

[0044] The depth measurement module includes a one-dimensional sensor for detecting the depth information of the current position from the rail surface;

[0045] The reference measurement module includes a one-dimensional sensor for detecting displacement information of the current position from the starting point;

[0046] The follow-up drive module is used to control the depth measurement module and the reference measurement module to move synchronously and collect data on a set moving route;

[0047] The central processing module includes:

[0048] Memory;

[0049] Processor; and

[0050] Computer programs;

[0051] The computer program is stored in the memory and configured to be executed by the processor to implement the method described in Embodiment 1.

[0052] Specifically, in this embodiment, the depth measurement module can be implemented using a point laser rangefinder or other sensor device capable of effectively measuring the distance between the current position and the rail surface. Point laser rangefinders are less expensive and offer higher detection accuracy compared to structured light sensors. The reference measurement module can be implemented using a grating ruler rangefinder or other sensor capable of high-precision displacement measurement. Grating ranging technology has a resolution between 0.1 and 10 μm. Grating ranging is a relatively mature technology, offering high detection accuracy at a low cost, making it a cost-effective choice.

[0053] The follow-up drive module can consist of a drive track and a drive device. The drive track provides a movement path for the depth measurement module and the reference measurement module. The drive device drives the depth measurement module and the reference measurement module to move on the drive track, so as to achieve synchronous follow-up measurement between the depth measurement module and the reference measurement module.

[0054] The system proposed in this embodiment, after integration, can be used for handheld measurement, measurement mounted on a simple trolley, or measurement on large machinery for rail profile measurement. It is simple to assemble and highly adaptable.

[0055] Furthermore, due to the limitations of existing laser inspection methods, such as fixed effective range and laser emission angle, it is difficult to use a single laser source to complete the overall profile inspection of a rail. Moreover, in rail profile inspection applications, it is necessary to match the inspected profile with a standard profile to analyze the rail condition or guide grinding operations. This necessitates using a reference standard as the basis for matching.

[0056] like Figure 5 As shown, in this embodiment, to increase the detection range of a single laser, a fitting fixture 6 is added to the rail jaw. This fitting fixture 6 is positioned below the straight line of the rail jaw and protrudes horizontally from the side of the rail. An extension of the rail jaw is provided by the fitting fixture 6 as a comparison reference. Adding this reference line allows for the indirect acquisition of the straight section below the rail jaw that is not illuminated by the laser, improving the problem of limited laser measurement range due to obstruction, thereby enabling a single laser to complete the profile measurement of the rail working tread. Using the extended reference line as a matching basis, the detected profile is matched with the standard profile, enabling the measurement of wear and the generation of a guiding grinding pattern.

[0057] The system proposed in this embodiment may also include a host interaction module, which has a display function and can present the detected profile data in chart form on the display screen, making it easy for technicians to view the data intuitively. Simultaneously, a power supply module can be provided to power all modules of the system.

[0058] Example 3

[0059] This embodiment proposes a computer-readable storage medium storing a computer program thereon; the computer program is executed by a processor to implement a rail profile detection method. This rail profile detection method is similar to that described in Embodiment 1, and will not be repeated here.

[0060] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of this application can be implemented using various computer languages.

[0061] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0062] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0063] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0064] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0068] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method of rail profile detection, characterized in that, An application is made to a rail profile inspection system, the rail profile inspection system comprising at least: a fitting fixture, the fitting fixture being disposed below the straight line of the rail jaw and horizontally protruding from the side of the rail; a depth measurement module, used to detect the fixture depth information of the current position from the surface of the fitting fixture, the fixture depth information being used as a matching reference for non-full-section inspection; the method comprising: Select two one-dimensional sensors and set the movement paths of the two one-dimensional sensors; The two one-dimensional sensors are moved along the moving route. During the movement, the two one-dimensional sensors collect data synchronously. One one-dimensional sensor collects the depth information of the current position from the rail surface, and the other one-dimensional sensor collects the displacement information of the current position from the starting point. The profile data is obtained based on the depth and displacement information; The process of obtaining profile data based on the depth and displacement information includes: Acquire depth and displacement information, and integrate the depth and displacement information to obtain a set of multiple data points containing the entire rail profile information; A reference coordinate system is set, and the multiple data point sets are converted into the corresponding two-dimensional coordinate data point set of the rail profile cross section according to the reference coordinate system. The complete profile data is obtained by stitching together the two-dimensional coordinate data points of the cross sections of the multiple rail profiles; The two one-dimensional sensors are used to collect data from the same cross-section of the rail using a multi-angle combination method. The range of data collection covers the entire cross-section of the rail. The data collection line segments of each angle combination are calibrated and spliced ​​on the same plane to obtain profile data. After obtaining the profile data based on the depth information and displacement information, the method further includes: The profile data is compared with a preset standard profile model to obtain wear data.

2. The method of claim 1, wherein, After obtaining the profile data based on the depth information and displacement information, the method further includes: The profile data is then displayed graphically.

3. A rail profile inspection system characterised in that, The system includes a depth measurement module, a reference measurement module, a follow-up drive module, and a central processing module; The depth measurement module includes a one-dimensional sensor for detecting the depth information of the current position from the rail surface; The reference measurement module includes a one-dimensional sensor for detecting displacement information of the current position from the starting point; The follow-up drive module is used to control the depth measurement module and the reference measurement module to move synchronously and collect data on a set moving route; A fitting clamp is provided below the straight line of the rail jaw and protrudes horizontally from the side of the rail. The depth measurement module is also used to detect the clamp depth information of the current position from the surface of the fitting clamp, and the clamp depth information is used as a matching reference when performing non-full-section detection; The central processing module includes: Memory; Processor; and Computer programs; The computer program is stored in the memory and configured to be executed by the processor to implement the method as described in any one of claims 1 to 2.

4. The system of claim 3, wherein, The system also includes a higher-level interaction module, which is used to graphically display the profile data.

5. The system of claim 3, wherein, The system also includes a power supply module, which supplies power to the depth measurement module, the reference measurement module, the servo drive module, the central processing module, and the host interaction module.

6. The system of claim 3, wherein, The depth measurement module and the reference measurement module use a multi-angle combination method to collect data from the same cross-section of the rail. The range of data collection covers the entire cross-section of the rail, and the data collection segments of each angle combination are calibrated and spliced ​​on the same plane to obtain profile data.

7. A computer readable storage medium characterized in that, It stores a computer program thereon; the computer program is executed by a processor to implement the method as described in any one of claims 1 to 2.

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