In-service high-speed-train body defect detection method based on x-ray flaw detection system

Abstract

The present invention relates to the technical field of X-ray tubes. Provided is an in-service high-speed-train body defect detection method based on an X-ray flaw detection system. The method comprises the following steps: S1, determining a detection start point and a detection end point; S2, moving a carrier vehicle into the interior of an in-service high-speed-train body; S3, calibrating the current positions of X-ray emitters and the current position of an X-ray detection strip; S4, starting at least three X-ray emitters and the X-ray detection strip; S5, making the carrier vehicle and the in-service high-speed-train body move in opposite directions at the same speed; S6, the X-ray detection strip sending defect detection information to an image processing system; S7, the image processing system converting the defect detection information into defect image information; and S8, a defect marking mechanism drawing a defect marker on the outer surface of the in-service high-speed-train body. The present invention can efficiently and precisely complete a one-time detection operation on the top wall and two side walls of an in-service high-speed train body running on rails.

Description

Defect Detection Method for High-Speed ​​Railway Vehicles Based on X-ray Flaw Detection System Technical Field

[0001] This invention relates to the field of X-ray tube technology, and in particular to a method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system. Background Technology

[0002] High-speed train bodies in service typically employ thin-walled cylindrical structures made from aluminum alloy profiles, resulting in numerous weld seams during manufacturing. These weld seams are highly susceptible to damage and defects during train operation due to their own tension and the influence of external environmental factors such as rain, hail, and dust.

[0003] Currently, ultrasonic testing or contact testing is commonly used to inspect vehicles in orbit. However, these two methods are not very sensitive to small defects, resulting in poor defect detection capabilities and low reliability of the test results obtained by existing technologies.

[0004] In addition, when inspecting on-rail vehicles, existing technologies require cleaning the surface of the high-speed train body and applying a coupling fluid before using ultrasonic waves to detect defects on the cleaned surface, which results in low inspection efficiency.

[0005] Existing patent document (application number: CN202311044285.4) discloses a device and system for detecting surface defects in vehicle sheet metal parts. It is applied to stamped sheet metal parts of automobiles, especially sheet metal parts with complex curved surfaces, but is not suitable for high-speed rail bodies in service.

[0006] Existing patent literature (application number: CN201620868441.8) discloses a metal pipe defect detection device. Although it uses a radiation emitter for detection, it has several drawbacks: First, the object being detected is a metal pipe. Since the specifications of metal pipes differ significantly from those of in-service high-speed train bodies, this metal pipe defect detection device cannot be applied to the inspection of in-service high-speed train bodies. Second, it requires the laying of two tracks on-site: one for the loading device and the other for the gantry, making operation very cumbersome. Furthermore, track laying is often constrained by geographical factors, making implementation difficult.

[0007] Existing patent literature (application number: CN202021868442.5) discloses an online production X-ray non-destructive testing device for conductive pipes. Although it also uses an X-ray non-destructive emitter for detection, it also has some drawbacks: First, the object being tested is a conductive pipe sample. Since the specifications of the conductive pipe sample differ greatly from those of the high-speed train body in service, this online production X-ray non-destructive testing device for conductive pipes cannot be applied to the inspection of high-speed train bodies in service. Second, a track and a material-carrying trolley that travels on the track are required for the conductive pipe sample, making operation cumbersome. Third, the X-ray non-destructive emitter is located on the outside of the conductive pipe sample. The conductive pipe sample must be rotated while being irradiated by the X-ray non-destructive emitter on a local structure, resulting in relatively low detection efficiency. Summary of the Invention

[0008] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide a method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system. This method can efficiently and accurately complete the inspection of the top wall and two side walls of a high-speed train body in service while it is in operation, and it also makes it easier for staff to find and repair the defective parts of the high-speed train body.

[0009] To address the aforementioned technical problems, this invention provides a method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system, wherein the X-ray flaw detection system includes:

[0010] Control system;

[0011] A carrier car located inside a high-speed train body in service, the carrier car includes a carrier platform and a driving mechanism located at the bottom of the carrier platform, the driving mechanism being communicatively connected to a control system, the high-speed train body in service being located on the train track and communicatively connected to the control system;

[0012] The X-ray emitting device includes at least three X-ray emitters, each X-ray emitter being communicatively connected to the control system. Each X-ray emitter includes a telescopic support column mounted on a mounting platform and an emitting head mounted on the top of the telescopic support column. The emitting head is provided with an elongated emission window. The X-ray emitters are used to irradiate the top or side walls of the high-speed train body in service.

[0013] The X-ray detection device includes an X-ray detection belt and a gantry. The two columns of the gantry are fixed on opposite sides of the train track to allow the high-speed train body to pass through. The extended shape of the X-ray detection belt is adapted to the shape of the gantry and the frame. The X-ray detection belt is located inside the gantry to receive X-rays emitted by the X-ray emitter. The X-ray detection belt is communicatively connected to the control system.

[0014] The image processing system is communicatively connected to the control system to analyze defect detection information in the X-ray detection zone and convert the defect detection information into defect image information.

[0015] The defect marking mechanism is mounted on the gantry and is communicatively connected to the control system to write defect icons on the outer surface of the high-speed train body based on defect image information.

[0016] The method for detecting defects in the body of a high-speed train in service includes the following steps:

[0017] S1, mark the start and end points of the inspection on the high-speed train body in service;

[0018] S2 involves placing the vehicle inside the body of a high-speed train in service.

[0019] S3, calibrate the current position of the X-ray emitter and the X-ray detection strip so that both the X-ray emitter and the X-ray detection strip are located on the cross section of the high-speed train body passing through the detection starting point;

[0020] S4, activate at least three X-ray emitters to emit fan-shaped X-rays toward the top wall and two side walls of the high-speed train body respectively, with the irradiation areas of two adjacent X-ray emitters on the high-speed train body connected or overlapping each other; activate the X-ray detection belt to receive X-rays that have passed through the high-speed train body and carry information about body defects.

[0021] S5, the vehicle is moved in a straight line along the length of the high-speed train body to the detection termination point, and the high-speed train body travels along the train track; the speed of the vehicle relative to the ground is always equal to the speed of the high-speed train body relative to the ground, and the direction of travel of the vehicle relative to the ground and the direction of travel of the high-speed train body relative to the ground are always opposite to each other, so that the X-ray emitter and the X-ray detection strip are always located on the same cross section of the high-speed train body.

[0022] S6, the X-ray detection belt sends defect detection information to the image processing system;

[0023] S7, the image processing system converts defect detection information into defect image information and presents it on a display screen in the form of a 3D image;

[0024] S8. Based on the defect image information, the in-service high-speed train body intermittently returns to its original position, and the defect marking mechanism paints defect icons on the outer surface of the in-service high-speed train body.

[0025] Furthermore, in step S1, the detection starting point is the front position of the high-speed train body in service, and the detection ending point is the rear position of the high-speed train body in service.

[0026] Furthermore, in step S4, the step of activating at least three X-ray emitters includes: adjusting the operating parameters of the X-ray emitters, including tube voltage, tube current, and focal spot size.

[0027] Furthermore, in step S7, the step of the image processing system converting defect detection information into defect image information includes: the image processing system accessing an expert database, comparing the defect detection information with the expert database, and determining whether there is a defect in the X-ray irradiation area corresponding to the defect detection information.

[0028] Furthermore, the defect marking mechanism includes an inverted U-shaped guide rail and multiple marking robots. The extended shape of the inverted U-shaped guide rail is adapted to the shape of the gantry and the frame. The inverted U-shaped guide rail is fixedly installed on the gantry, and all marking robots can be slidably installed on the inverted U-shaped guide rail.

[0029] Furthermore, the marking robot includes a base slidably mounted on an inverted U-shaped guide rail, a telescopic arm mounted on the base, and a marking working end mounted at the end of the telescopic arm.

[0030] Furthermore, the X-ray detection belt is fixedly mounted on the gantry via multiple connecting columns.

[0031] As described above, the method for detecting defects in the body of a high-speed train based on an X-ray flaw detection system of the present invention has the following beneficial effects: In the present invention, S1, the detection start point and detection end point are marked on the body of the high-speed train in service. The part between the detection start point and the detection end point can be the entire body of the high-speed train in service or a section of the body of the high-speed train in service; S2, the carriage is placed inside the body of the high-speed train in service; the gantry is fixedly set on the ground and spans across the body of the high-speed train in service, so that the X-ray detection belt can receive all the X-rays passing through the body of the high-speed train in service; S3, the X-ray emitter and the X-ray detection belt are calibrated. The current position ensures that both the X-ray emitter and the X-ray detection strip are located on the cross-section of the high-speed train body passing through the detection starting point. This is a crucial preparatory step for the carrier vehicle and the high-speed train body to move in opposite directions at the same speed. The carrier vehicle can travel at a constant speed, variable speed, or intermittently, and the high-speed train body can also travel at a constant speed, variable speed, or intermittently, as long as the carrier vehicle and the high-speed train body move in opposite directions at the same speed. S4, at least three X-ray emitters are activated to emit fan-shaped X-rays towards the top wall and two side walls of the high-speed train body, respectively. The irradiation areas of two adjacent X-ray emitters on the high-speed train body are connected or overlapped. The X-ray detection strip is activated. S5, the X-ray detection belt receives X-rays that have passed through the high-speed train body and carry information about defects; S6, the vehicle is moved in a straight line along the length of the high-speed train body to the detection termination point, and the high-speed train body moves in a straight line along the train track; during this period, the speed of the vehicle is always equal to the speed of the high-speed train body, and the directions of travel of the vehicle and the high-speed train body are always opposite to each other, so that the X-ray emitter and the X-ray detection belt are always located on the same cross-section of the high-speed train body; S7, the X-ray detection belt sends the defect detection information to the image processing system; specifically, because the defect location of the high-speed train body is close to the service high-speed train body, the X-ray detection belt is moved in a straight line along the length of the service high-speed train body to the detection termination point, and the high-speed train body moves in a straight line along the train track; during this period, the speed of the vehicle is always equal to the speed of the high-speed train body, and the directions of travel of the vehicle and the service high-speed train body are always opposite to each other, so that the X-ray emitter and the X-ray detection belt are always located on the same cross-section of the high-speed train body; S8, the X-ray detection belt sends the defect detection information to the image processing system; specifically, because the defect location of the high-speed train body is close to the service high-speed train body, the X-ray detection belt is moved in a straight line along the length of the service high-speed train body, and the X-ray detection belt is moved in a straight line along the track; during this period, the speed of the vehicle is always equal to the speed of the high-speed train body, and the directions of travel of the vehicle and the service high-speed train body are always opposite to each other, so that the X-ray detection belt is always located on the same cross-section of the high-speed train body; S9, the X-ray detection belt sends the defect detection information to the image processing system; specifically, because the defect location of the high-speed train body is close to The density of normal parts of the train car body varies, resulting in differences in X-ray intensity passing through defective areas compared to normal areas. The X-ray detection belt transmits the defect detection information corresponding to these different intensities of X-rays to the image processing system via the control system. In step S7, the image processing system converts the defect detection information into defect image information and presents it as a 3D image on a display screen. In step S8, based on the defect image information, the high-speed train car body intermittently retracts to its original position, and a defect marking mechanism paints defect icons on the outer surface of the car body. This facilitates the quick location of defects on the outer surface of the high-speed train car body by staff. The defect marking mechanism can employ a robotic arm or use different marking methods to characterize the severity of the defect, facilitating appropriate maintenance work by staff.Therefore, the method for detecting defects in the in-service high-speed train body based on the X-ray flaw detection system of the present invention can efficiently and accurately complete the inspection of the top wall and two side walls of the in-service high-speed train body in one go, and facilitates the staff to find and repair the defective parts of the in-service high-speed train body. Attached Figure Description

[0032] Figure 1 shows a three-dimensional schematic diagram of the X-ray flaw detection system of the present invention when inspecting the body of a high-speed train in service.

[0033] Figure 2 shows a front view schematic diagram of the X-ray flaw detection system of the present invention when inspecting the body of a high-speed train in service.

[0034] Figure 3 shows a schematic diagram of the connection between the gantry, the X-ray detection belt, and the defect marking mechanism.

[0035] Figure 4 is an enlarged view of part A in Figure 3.

[0036] Figure 5 shows a schematic diagram of the connection between the vehicle and the X-ray emitting device.

[0037] Component labeling description: Control system 1, Carrier 2, Carrier platform 21, Traveling mechanism 22, X-ray emitting device 3, X-ray emitter 31, Telescopic support 311, Emitting head 312, Emission window 313, X-ray detection device 4, X-ray detection belt 41, Gantry 42, Column 421, Connecting column 43, Image processing system 5, Defect marking mechanism 6, Inverted U-shaped guide rail 61, Marking robot 62, Base 621, Telescopic arm 622, Marking working end 623, High-speed train body in service 7, Top wall 71, Side wall 72, Train track 8. Detailed Implementation

[0038] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0039] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0040] In Figure 1, the X-axis represents the width of the high-speed train body 7, the Y-axis represents the length of the high-speed train body 7, and the Z-axis represents the height of the high-speed train body 7; the non-solid straight arrows represent the travel direction of the vehicle 2, and the solid straight arrows represent the travel direction of the high-speed train body 7.

[0041] As shown in Figures 1, 2, 3, 4, and 5, this invention provides a method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system. The X-ray flaw detection system includes:

[0042] Control system 1;

[0043] The carrier 2 is located inside the body 7 of a high-speed train in service. The carrier 2 includes a carrier platform 21 and a driving mechanism 22 located at the bottom of the carrier platform 21. The driving mechanism 22 is communicatively connected to the control system 1. The body 7 of the high-speed train in service is located on the train track 8 and is communicatively connected to the control system 1.

[0044] X-ray emitting device 3 includes at least three X-ray emitters 31. Each X-ray emitter 31 is communicatively connected to the control system 1. Each X-ray emitter 31 includes a telescopic support 311 mounted on the mounting platform 21 and an emitting head 312 mounted on the top of the telescopic support 311. The emitting head 312 is provided with an elongated emission window 313. The X-ray emitter 31 is used to irradiate the top wall 71 or side wall 72 of the high-speed train body 7 in service.

[0045] X-ray detection device 4 includes an X-ray detection belt 41 and a gantry 42. The two columns 421 of the gantry 42 are fixedly installed on opposite sides of the train track 8 to allow the high-speed train body 7 to pass through. The extended shape of the X-ray detection belt 41 is adapted to the shape of the gantry 42 and the frame. The X-ray detection belt 41 is located inside the gantry 42 to receive X-rays emitted by the X-ray emitter 31. The X-ray detection belt 41 is communicatively connected to the control system 1.

[0046] Image processing system 5 is communicatively connected to control system 1 to analyze defect detection information of X-ray detection zone 41 and convert the defect detection information into defect image information.

[0047] Defect marking mechanism 6 is movably mounted on gantry 42 and is communicatively connected to control system 1 to write defect icons on the outer surface of the high-speed train body 7 according to defect image information.

[0048] The method for detecting defects in the body of a high-speed train in service includes the following steps:

[0049] S1 marks the start and end points of inspection on the 7-marker on the body of the high-speed train in service.

[0050] S2, the vehicle 2 is placed inside the high-speed train body 7 in service;

[0051] S3, calibrate the current positions of X-ray emitter 31 and X-ray detection strip 41 so that both X-ray emitter 31 and X-ray detection strip 41 are located on the cross section of the high-speed train body 7 passing through the detection starting point;

[0052] S4, activate at least three X-ray emitters 31 to emit fan-shaped X-rays toward the top wall 71 and two side walls 72 of the high-speed train body 7 respectively, with the irradiation areas of two adjacent X-ray emitters 31 on the high-speed train body 7 connected or overlapping each other; activate the X-ray detection belt 41 to receive X-rays that have passed through the high-speed train body 7 and carry information about body defects.

[0053] S5, the carrier 2 moves in a straight line along the length of the high-speed train body 7 to the detection termination point, and the high-speed train body 7 travels along the train track 8; the speed of the carrier 2 relative to the ground is always equal to the speed of the high-speed train body 7 relative to the ground, and the direction of travel of the carrier 2 relative to the ground and the direction of travel of the high-speed train body 7 relative to the ground are always opposite to each other, so that the X-ray emitter 31 and the X-ray detection belt 41 are always located on the same cross section of the high-speed train body 7.

[0054] S6, X-ray detection belt 41 sends defect detection information to image processing system 5;

[0055] S7, the image processing system 5 converts the defect detection information into defect image information and presents it on a display screen in the form of a 3D image;

[0056] S8, based on the defect image information, the in-service high-speed rail body 7 intermittently returns to its original position, and the defect marking mechanism 6 paints defect icons on the outer surface of the in-service high-speed rail body 7.

[0057] In the X-ray flaw detection system of this invention, the control system 1 is an existing structure and will not be described in detail. The control system 1 mainly functions as information interaction and information processing. The mounting vehicle 2 is placed inside the in-service high-speed rail body 7 and can move linearly along the length of the in-service high-speed rail body 7 under the control of the control system 1. The mounting platform 21 is used to install the X-ray emitting device 3. The number of X-ray emitters 31 is at least three. Only three X-ray emitters 31 are shown in the accompanying drawings. Their radiation angles can cover the top wall 71 and / or the side walls 72, and the radiation angles corresponding to different X-ray emitters 31 overlap. In practice, there can be N X-ray emitters 31. Each time, n (n≤N) of the X-ray emitters 31 can be used, as long as the radiation angles of these n X-ray emitters 31 can cover the top wall 71 and the two side walls 72. In extreme cases, N can be several hundred, with dozens of X-ray emitters 31 being emitted simultaneously each time. The hundreds of X-ray emitters 31 are emitted in rotation, with dozens emitting at a time. In other words, for the same defect location, defect detection information can be obtained from different angles, and then reconstructed using existing software. For example, the X-ray emitting device 3 includes three X-ray emitters 31 arranged side-by-side along the width of the high-speed train body 7, designated as X-ray emitter 1, X-ray emitter 2, and X-ray emitter 31. X-ray emitter 2 is used to irradiate the top wall 71 of the high-speed train body 7, while X-ray emitter 1 and X-ray emitter 31 are used to irradiate the two side walls 72 of the high-speed train body 7, respectively. Because the emission window 313 is elongated, the emitted X-rays diffuse. Since the height of the telescopic support 311 can be raised or lowered, the area irradiated by the emitting head 312 on the high-speed train body 7 will change. Preferably, X-ray emitter 1 and X-ray emitter 31 are symmetrically arranged on opposite sides of X-ray emitter 2. To simultaneously receive X-rays emitted by at least three X-ray emitters 31, the high-speed train body 7 and the carriage 2 must move in opposite directions at the same speed. The two columns 421 of the gantry 42 are fixedly installed on opposite sides of the train track 8 to allow the high-speed train body 7 to pass through. The extended shape of the X-ray detection belt 41 is adapted to the shape of the gantry 42 and the frame. The X-ray detection belt 41 is located inside the gantry 42 to receive X-rays emitted by the X-ray emitters 31. The X-ray detection belt 41 is an existing structure and will not be described in detail. Its general structure is as follows: the X-ray detection belt 41 has X-ray detection units closely arranged along its extension direction. The image processing system 5 is an existing structure and will not be described in detail; it mainly includes image processing hardware or image processing software.Image processing system 5 is communicatively connected to control system 1 to analyze defect detection information from X-ray detection zone 41 and convert it into defect image information. The defect image information can be a 3D model with different colors, such as red for defective areas and green for defect-free areas. Finally, to facilitate quick location of defects on the high-speed train body 7, a defect marking mechanism 6 is movably mounted on gantry 42. This allows the defect marking mechanism 6 to move to the vicinity of the defective area during the intermittent retraction of the high-speed train body 7 to mark defects on its outer surface based on the defect image information.

[0058] In the method for detecting defects in the high-speed train body of the present invention, S1, a detection start point and a detection end point are marked on the high-speed train body 7. The part between the detection start point and the detection end point can be the entire high-speed train body 7 or a section of the high-speed train body 7.

[0059] S2, the vehicle 2 is placed inside the high-speed train body 7 in service; the gantry is fixed on the ground and the gantry 42 is laid across the high-speed train body 7 in service, so that the X-ray detection belt 41 can receive all the X-rays that pass through the high-speed train body 7 in service.

[0060] S3, calibrate the current positions of the X-ray emitter 31 and the X-ray detection belt 41 so that both are located on the cross-section of the high-speed train body 7 passing through the detection starting point. This is a crucial preparatory step for the carrier 2 and the high-speed train body to move in opposite directions at the same speed. The carrier 2 can travel at a constant speed, variable speed, or intermittently, and the high-speed train body can also travel at a constant speed, variable speed, or intermittently, as long as the carrier 2 and the high-speed train body move in opposite directions at the same speed. For example, since defects in the high-speed train body 7 usually occur at the welds of the high-speed train body 7, when inspecting the welds of the high-speed train body 7, the travel speed of the carrier 2 and the high-speed train body can be slightly slower, or even stopped, to obtain sufficient X-rays carrying defect signals, thereby improving detection sensitivity, resolution, and detection reliability. When inspecting non-welded parts of the high-speed train body 7, the travel speed of the carrier 2 and the high-speed train body can be slightly faster to improve the efficiency of defect detection for the entire high-speed train body 7.

[0061] S4, activate at least three X-ray emitters 31 to emit fan-shaped X-rays toward the top wall 71 and two side walls 72 of the high-speed train body 7, respectively. The irradiation areas of two adjacent X-ray emitters 31 on the high-speed train body 7 are connected or overlapped. Activate the X-ray detection belt 41 to receive X-rays that have passed through the high-speed train body 7 and carry information about body defects. For example, the angle corresponding to the diffused X-rays emitted by the second X-ray emitter 31 is 77 degrees, and the angle corresponding to the diffused X-rays emitted by the first and third X-ray emitters 31 is 104 degrees.

[0062] S5, the carrier 2 moves in a straight line along the length of the high-speed train body 7 to the detection termination point, and the high-speed train body 7 moves in a straight line along the train track 8; during this period, the speed of the carrier is always equal to the speed of the high-speed train body, and the direction of travel of the carrier and the direction of travel of the high-speed train body are always opposite to each other, so that the X-ray emitter 31 and the X-ray detection belt 41 are always located on the same cross section of the high-speed train body 7.

[0063] S6, X-ray detection belt 41 sends defect detection information to image processing system 5; specifically, since the defective part of the high-speed rail body 7 and the normal part of the high-speed rail body 7 have different densities, the intensity of X-rays passing through the defective part is different from the intensity of X-rays passing through the normal part. X-ray detection belt 41 transmits the defect detection information corresponding to X-rays with different intensities to image processing system 5 through control system 1.

[0064] S7, the image processing system 5 converts the defect detection information into defect image information and presents it as a 3D image on a display screen; for example, a 3D model scaled down to the same size as the high-speed train body 7 is displayed on the display screen.

[0065] S8, based on the defect image information, the high-speed train body 7 intermittently retracts to its original position, and the defect marking mechanism 6 paints defect icons on the outer surface of the high-speed train body 7. This facilitates workers in quickly locating defective areas on the outer surface of the high-speed train body 7. The defect marking mechanism 6 can be a robotic arm or can use different marking methods to characterize the severity of defects, facilitating appropriate maintenance work. For example, based on the defect image information, firstly, the high-speed train body 7 retracts to a first preset position, and the defect marking mechanism 6 paints defect icons on the outer surface of the high-speed train body 7; then, the high-speed train body 7 continues to travel and retracts to a second preset position, and the defect marking mechanism 6 paints defect icons on the outer surface of the high-speed train body 7, until all defective areas are marked with defect icons. Finally, the high-speed train body 7 retracts to its original position.

[0066] Therefore, the method for detecting defects in the in-service high-speed train body based on the X-ray flaw detection system of the present invention can efficiently and accurately complete the inspection of the top wall and two side walls of the in-service high-speed train body 7 while it is in operation, and it is also convenient for staff to find and repair the defective parts of the in-service high-speed train body 7.

[0067] Furthermore, in order to complete the inspection of the entire in-service high-speed train body 7 in one go, in step S1, the inspection starting point is the front position of the in-service high-speed train body 7, and the inspection ending point is the rear position of the in-service high-speed train body 7.

[0068] Furthermore, since the materials and wall thicknesses of the high-speed train bodies 7 vary depending on their specifications, step S4, which involves activating at least three X-ray emitters 31, includes adjusting the operating parameters of the X-ray emitters 31. These parameters include tube voltage, tube current, and focal spot size. The purpose of this step is to ensure that the X-rays emitted by the X-ray generators can penetrate the high-speed train body 7, facilitating accurate characterization of body defects through the amount of X-ray photons, and providing sufficient detection resolution and sensitivity.

[0069] Furthermore, in order to improve the detection accuracy of defect locations, in step S7, the step of the image processing system 5 converting defect detection information into defect image information includes: the image processing system 5 accessing an expert database, the image processing system 5 comparing the defect detection information with the expert database, and determining whether there is a defect in the X-ray irradiation area corresponding to the defect detection information.

[0070] Furthermore, in order to facilitate the application of defect icons to different parts of the high-speed train body 7, the defect marking mechanism 6 includes an inverted U-shaped guide rail 61 and multiple marking robots 62. The extended shape of the inverted U-shaped guide rail 61 is adapted to the shape of the gantry 42 and the frame. The inverted U-shaped guide rail 61 is fixedly installed on the gantry 42, and all marking robots 62 can be slidably installed on the inverted U-shaped guide rail 61.

[0071] Furthermore, the marking robot 62 may be a robot with multiple joints, and may also include a base 621 slidably disposed on an inverted U-shaped guide rail 61, a telescopic arm 622 disposed on the base 621, and a marking working end 623 disposed at the end of the telescopic arm 622. The marking working end 623 may be a paint spray head.

[0072] Furthermore, to simplify the connection structure, the X-ray detection belt 41 is fixedly mounted on the gantry 42 by multiple connecting posts 43.

[0073] In summary, this invention enables efficient and precise one-time inspection of the top wall and two side walls of a high-speed train in service, facilitating the identification and repair of defects in the train's body. Therefore, this invention effectively overcomes the shortcomings of existing technologies and possesses significant industrial application value.

[0074] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system, characterized in that: The X-ray flaw detection system includes: Control system (1); A carrier (2) is located inside a high-speed train body (7) in service. The carrier (2) includes a carrier platform (21) and a driving mechanism (22) located at the bottom of the carrier platform (21). The driving mechanism (22) is communicatively connected to the control system (1). The high-speed train body (7) in service is located on the train track (8) and is communicatively connected to the control system (1). X-ray emitting device (3), the X-ray emitting device (3) includes at least three X-ray emitters (31), each X-ray emitter (31) is communicatively connected to the control system (1), each X-ray emitter (31) includes a telescopic support (311) provided on the mounting platform (21) and an emitting head (312) provided on the top of the telescopic support (311), the emitting head (312) is provided with a long strip-shaped emission window (313), the X-ray emitter (31) is used to irradiate the top wall (71) or side wall (72) of the high-speed train body (7) in service; X-ray detection device (4), the X-ray detection device (4) includes an X-ray detection belt (41) and a gantry (42). The two columns (421) of the gantry (42) are fixedly installed on opposite sides of the train track (8) to allow the high-speed train body (7) to pass through. The extended shape of the X-ray detection belt (41) is adapted to the shape of the gantry (42) and the frame. The X-ray detection belt (41) is located inside the gantry (42) to receive X-rays emitted by the X-ray emitter (31). The X-ray detection belt (41) is communicatively connected to the control system (1). Image processing system (5) is communicatively connected to control system (1) to analyze defect detection information of X-ray detection zone (41) and convert defect detection information into defect image information; The defect marking mechanism (6) is movably mounted on the gantry (42) and is communicatively connected to the control system (1) to write defect icons on the outer surface of the high-speed train body (7) in service according to defect image information. The method for detecting defects in the body of a high-speed train in service includes the following steps: S1, mark the start and end points of the inspection on the high-speed train body (7) in service; S2, the vehicle (2) is placed inside the high-speed train body (7) in service; S3, calibrate the current positions of the X-ray emitter (31) and the X-ray detection strip (41) so that both the X-ray emitter (31) and the X-ray detection strip (41) are located on the cross section of the high-speed train body (7) passing through the detection starting point; S4, activate at least three X-ray emitters (31) to emit fan-shaped X-rays toward the top wall (71) and two side walls (72) of the high-speed train body (7) in service, respectively, with the irradiation areas of two adjacent X-ray emitters (31) on the high-speed train body (7) being connected or overlapping; activate the X-ray detection belt (41) to receive X-rays that have passed through the high-speed train body (7) in service and carry information on body defects; S5, make the carrier (2) move in a straight line along the length of the high-speed train body (7) to the detection termination point, and make the high-speed train body (7) travel along the train track (8); the speed of the carrier (2) relative to the ground is always equal to the speed of the high-speed train body (7) relative to the ground, and the direction of travel of the carrier (2) relative to the ground and the direction of travel of the high-speed train body (7) relative to the ground are always opposite to each other, so that the X-ray emitter (31) and the X-ray detection belt (41) are always located on the same cross section of the high-speed train body (7); S6, the X-ray detection belt (41) sends the defect detection information to the image processing system (5); S7, the image processing system (5) converts the defect detection information into defect image information and presents it on a display screen in the form of a 3D image; S8. Based on the defect image information, the service high-speed rail body (7) intermittently returns to its original position, and the defect marking mechanism (6) paints defect icons on the outer surface of the service high-speed rail body (7).

2. The method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system according to claim 1, characterized in that: In step S1, the detection start point is the front position of the high-speed train body (7) in service, and the detection end point is the rear position of the high-speed train body (7) in service.

3. The method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system according to claim 1, characterized in that: In step S4, the step of activating at least three X-ray emitters (31) includes: adjusting the operating parameters of the X-ray emitters (31), including tube voltage, tube current and focal spot size.

4. The method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system according to claim 1, characterized in that: In step S7, the step of the image processing system (5) converting defect detection information into defect image information includes: the image processing system (5) accessing an expert database, comparing the defect detection information with the expert database, and determining whether there is a defect in the X-ray irradiation area corresponding to the defect detection information.

5. The method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system according to claim 1, characterized in that: The defect marking mechanism (6) includes an inverted U-shaped guide rail (61) and multiple marking robots (62). The extended shape of the inverted U-shaped guide rail (61) is adapted to the shape of the gantry (42) and the frame. The inverted U-shaped guide rail (61) is fixedly installed on the gantry (42), and all marking robots (62) can be slidably installed on the inverted U-shaped guide rail (61).

6. The method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system according to claim 5, characterized in that: The marking robot (62) includes a base (621) slidably disposed on an inverted U-shaped guide rail (61), a telescopic arm (622) disposed on the base (621), and a marking working end (623) disposed at the end of the telescopic arm (622).

7. The method for detecting defects in the body of a high-speed train in service based on an X-ray flaw detection system according to claim 1, characterized in that: The X-ray detection strip (41) is fixedly mounted on the gantry (42) by multiple connecting columns (43).

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