Train wheel offset detection device and train wheel out-of-roundness detection system

Abstract

The invention discloses a train wheel offset detection device and a train wheel out-of-roundness detection system. The offset detection device comprises: a base; a longitudinal detection component, comprising a longitudinal flaw detection plate and a longitudinal support; a transverse detection component, comprising a transverse flaw detection plate and a transverse support; and the out-of-roundness detection system comprises a direction detection component, a speed detection component, a wheel diameter detection component, an offset detection component, a run-off detection component and an image acquisition component. The invention realizes the relative position measurement of the wheel and the rail through the offset detection device, and realizes the high-precision calculation of the wheel out-of-roundness by combining the compensation calculation and correction of the detection data of the speed detection component and the wheel diameter detection component. At the same time, with the assistance of the direction detection component, the run-off detection component and the image acquisition component, it can realize all-weather, multi-vehicle automatic and intelligent detection, and the relevant detection results are sent to the train inspection personnel in time to guide the vehicle receiving, inspection and maintenance.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to a train wheel offset detection device and a train wheel out-of-roundness detection system. Background Art

[0002] At present, the contact measurement method is mainly used for measuring the out-of-roundness of train wheels. Contact measurement includes wheel lifting measurement and contact plate measurement. Wheel lifting measurement requires lifting the train and then rotating the wheel, and then positioning the measuring equipment to clamp on the rail, and converting the runout of the wheel tread radius into out-of-roundness, and the measurement efficiency is very low. Contact plate measurement mostly uses the parallelogram principle. When the train passes through the measuring equipment, the contact between the flaw detection plate and the wheel rim is measured by measuring the up and down fluctuations of the highest point of the wheel rim, and indirectly measuring the fluctuation amount on the tread, so as to calculate the out-of-roundness. However, when the train passes through the car, it will move left and right in a serpentine manner. The wheel tread profile and the rail profile are arcs. After the wheel creeps left and right, the contact point between the wheel tread and the rail will move left and right, resulting in the front and rear measurement values ​​not being on the same concentric circle. The final calculated value will introduce a large error, and the error value may even exceed the limit requirement of out-of-roundness, which cannot meet the detection requirements. Therefore, realizing high-precision out-of-roundness detection of the train without lifting the wheel and passing through is of great significance to ensuring the quality of train safety detection and improving detection efficiency. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a train wheel offset detection device and a train wheel out-of-roundness detection system to solve the technical problems of low efficiency and large error in the existing high-precision detection of train wheel out-of-roundness.

[0004] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0005] In a first aspect, the present invention provides a device for detecting a train wheel offset, comprising:

[0006] The base is arranged on the side of the rails on which the train travels;

[0007] A longitudinal detection assembly, comprising a longitudinal flaw detection plate and a longitudinal support member, wherein the longitudinal support member is fixed on the base, the longitudinal flaw detection plate is fixedly connected to the longitudinal support member, and under the supporting force of the longitudinal support member, the flaw detection surface of the longitudinal flaw detection plate is kept horizontally arranged on one side of the rail;

[0008] The transverse detection component includes a transverse flaw detection plate and a transverse support member, wherein the transverse support member is fixed on the base, the transverse flaw detection plate is fixedly connected to the transverse support member, and its flaw detection surface is kept vertically arranged on one side of the rail under the supporting force of the transverse support member.

[0009] Optionally, the longitudinal support member comprises:

[0010] A longitudinal base is arranged on a side wall of the base close to the rail;

[0011] A first longitudinal connecting seat, comprising a plurality of first longitudinal shaft seats, wherein the plurality of first longitudinal shaft seats are distributed on the top of the longitudinal base;

[0012] The second longitudinal connecting seat comprises a plurality of second longitudinal shaft seats, wherein the plurality of second longitudinal shaft seats are distributed and arranged at the bottom of the longitudinal flaw detection plate; the number of the second longitudinal shaft seats is the same as that of the first longitudinal shaft seats;

[0013] Multiple longitudinal connecting rods and longitudinal elastic members, the ends of the multiple longitudinal connecting rods and longitudinal elastic members are all provided with longitudinal rotating shafts, and the multiple longitudinal connecting rods and longitudinal elastic members are rotatably connected between the corresponding first longitudinal shaft seat and the second longitudinal shaft seat through the longitudinal rotating shafts.

[0014] Optionally, the longitudinal support member further comprises:

[0015] A longitudinal bracket, fixed to the inner side wall of the base;

[0016] A longitudinal encoder, embedded in the longitudinal bracket;

[0017] A longitudinal coupling, wherein the input end of the longitudinal coupling is connected to the longitudinal rotating shaft of any of the longitudinal links, and the output end of the longitudinal coupling is connected to the input end of the longitudinal encoder.

[0018] Optionally, the lateral support member comprises:

[0019] A transverse base, arranged on the side wall on the upper side of the base;

[0020] A first transverse connecting seat, comprising a plurality of first transverse shaft seats, wherein the plurality of first transverse shaft seats are distributed on a side wall of the transverse base close to the rail;

[0021] A second transverse connecting seat, comprising a plurality of second transverse shaft seats, wherein the plurality of second transverse shaft seats are distributed on a side wall of the transverse flaw detection plate away from the rail; the number of the second transverse shaft seats is the same as that of the first transverse shaft seats;

[0022] A plurality of transverse connecting rods and transverse elastic members, ends of which are provided with transverse rotating shafts, and the plurality of transverse connecting rods and transverse elastic members are rotatably connected between the corresponding first transverse shaft seat and the second transverse shaft seat through the transverse rotating shafts.

[0023] Optionally, the lateral support member further comprises:

[0024] A transverse bracket, fixed to the inner side wall of the base;

[0025] A transverse encoder, embedded in the transverse bracket;

[0026] A transverse coupling, wherein the input end of the transverse coupling is connected to the transverse rotating shaft of any of the transverse connecting rods, and the output end of the transverse coupling is connected to the input end of the transverse encoder.

[0027] Optionally, the detection device also includes a rail clamp, which includes a fixed base plate, a first clamp block, a second clamp block and bolts; at least one cross beam is arranged in parallel on the upper surface of the fixed base plate, and the first clamp block and the second clamp block are fixed to both ends of the cross beam by bolts; the fixed base plate is arranged under the rail, and the first clamp block and the second clamp block are clamped at the bottom of the rail; the base is fixed to the side wall on the upper side of the fixed base plate.

[0028] In a second aspect, the present invention provides a system for detecting the out-of-roundness of train wheels, comprising a direction detection component, a speed detection component, a wheel diameter detection component, an offset detection component and a departure detection component which are sequentially arranged along the rail, and an image acquisition component is also arranged on one side of the speed detection component; the offset detection component comprises a plurality of offset detection devices, each of which adopts the train wheel offset detection device as described above; a plurality of the offset detection devices are distributed on the inner side of the rail, and a distribution distance of the plurality of the offset detection devices along the rail is greater than the circumference of the train wheel; the direction detection component is used to detect the direction of travel of the train, the speed detection component is used to detect the passing speed of the train, the wheel diameter detection component is used to detect the point cloud coordinates of the train wheel, the offset detection component is used to detect the offset of the train wheel, the departure detection component is used to detect the train departure signal, and the image acquisition component is used to capture train images.

[0029] Optionally, the detection system also includes a pretreatment component, which includes a roller brush, a roller brush driving mechanism and a purge mechanism; the roller brush driving mechanism and the purge mechanism are arranged on the inner side of the rail, and the roller brush is arranged at the output end of the roller brush driving mechanism. When the train wheels pass by, the roller brush is driven by the roller brush driving mechanism to rotate in the opposite direction to the train wheels to clean the edges of the train wheels, and the purge mechanism purges the roller brush.

[0030] In a third aspect, the present invention provides a method for detecting the out-of-roundness of a train wheel. Based on the above-mentioned detection system, the detection method comprises:

[0031] In response to the direction detection component detecting the travel direction of the train, and the travel direction of the train is a preset direction, the speed detection component detects the passing speed of the train, the wheel diameter detection component detects the point cloud coordinates of the train wheels, the offset detection component detects the offset of the train wheels, the departure detection component detects the departure signal of the train, and the image acquisition component is used to adjust the acquisition interval time of the image acquisition component based on the passing speed of the train so as to acquire an image of the train based on the image acquisition component;

[0032] Calculate the out-of-roundness of the train wheel based on the point cloud coordinates and offset of the train wheel;

[0033] Based on the train image, identify train vehicle information;

[0034] Based on the departure signal of the train, it is determined that the current round of detection is completed, and the train wheel out-of-roundness and train vehicle information are integrated and uploaded.

[0035] Optionally, the calculating the out-of-roundness of the train wheel based on the point cloud coordinates and the offset of the train wheel includes:

[0036] Calculate the train wheel lateral offset compensation value based on the train wheel point cloud coordinates and offset

[0037]

[0038] Where m is the lateral distance from the contact point between the train wheel tread and the rail to the inner side wall of the train wheel when there is no deviation, and X ni is the lateral offset of the ith sampling point collected by the nth offset detection device; f(m), f(m+X ni ) is the lateral distance m from the inner side wall of the train wheel to the lowest point of the train wheel tread and the distance m+X ni The vertical coordinate of the point cloud in the train wheel coordinate system;

[0039] Calculate the rail contact point offset compensation value based on the pre-stored rail point cloud data

[0040]

[0041] Where a is the lateral distance from the contact point between the train wheel tread and the rail to the outer side wall of the rail when there is no deviation, g(a), g(a+X ni ) is the lateral distance a from the outer side wall of the rail to the lowest point of the train wheel tread and the distance a+X ni The vertical coordinate of the point cloud in the rail coordinate system;

[0042] Take the three point cloud coordinates in the train wheel coordinate system and fit the diameter D of the train wheel;

[0043] According to the lateral offset compensation value Lateral offset compensation value The diameter D is used to calculate the radius r corresponding to the i-th sampling point collected by the n-th offset detection device. ni :

[0044] r ni =D / 2-(H m +Y ni +ΔY ni )

[0045]

[0046] In the formula, H m Y is the longitudinal distance from the base point at the transverse distance m from the inner side wall of the train wheel to the lowest point of the train wheel flange. ni The longitudinal offset of the ith sampling point collected by the nth offset detection device;

[0047] According to the radius value r corresponding to each sampling point ni Calculate the out-of-roundness of train wheels.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] The train wheel offset detection device and train wheel out-of-roundness detection system provided by the present invention can detect the longitudinal offset and lateral offset of the train wheel during driving through the longitudinal detection component and the lateral detection component; at the same time, the accuracy of the train wheel out-of-roundness detection can be improved based on the longitudinal offset and lateral offset; it can realize all-weather, multi-model automated and intelligent detection, and the relevant detection results are sent to the train inspection personnel in a timely manner to guide the vehicle reception, inspection and maintenance. The device and system provided by the present invention can be installed on the line with standard sleeper spacing, which is easy to install, requires less railway line modification, and is flexible and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a working schematic diagram of a train wheel offset detection device provided by an embodiment of the present invention;

[0051] Figure 2 is a schematic structural diagram of a longitudinal support member provided by an embodiment of the present invention;

[0052] Figure 3 is a schematic structural diagram of a transverse support member provided by an embodiment of the present invention;

[0053] Figure 4 is a schematic diagram of the structure inside the base provided by an embodiment of the present invention;

[0054] Figure 5 is a schematic diagram of the structure of a detection device provided by an embodiment of the present invention;

[0055] Figure 6 is a schematic diagram of the installation of a train wheel offset detection device provided by an embodiment of the present invention;

[0056] Figure 7 is a schematic structural diagram of a train wheel out-of-roundness detection system provided by an embodiment of the present invention;

[0057] The markings in the figure are:

[0058] 1- Rails;

[0059] 2- base;

[0060] 3-longitudinal detection assembly; 31-longitudinal flaw detection plate; 32-longitudinal support member; 321-longitudinal base; 322-first longitudinal shaft seat; 323-second longitudinal shaft seat; 324-longitudinal connecting rod; 325-longitudinal elastic member; 326-longitudinal rotating shaft; 327-longitudinal bracket; 328-longitudinal encoder; 329-longitudinal coupling;

[0061] 4- transverse detection assembly; 41- transverse flaw detection plate; 42- transverse support member; 421- transverse base; 422- first transverse shaft seat; 423- second transverse shaft seat; 424- transverse connecting rod; 425- transverse elastic member; 426- transverse rotating shaft; 427- transverse bracket; 428- transverse encoder; 429- transverse coupling;

[0062] 5-rail clamp; 51-fixed bottom plate; 52-first clamping block; 53-second clamping block; 54-bolt; 55-crossbeam;

[0063] 7-direction detection component; 71-first magnetic steel; 72-second magnetic steel;

[0064] 8-speed detection component; 81-third magnetic steel; 82-fourth magnetic steel;

[0065] 9- wheel diameter detection component;

[0066] 10- offset detection component;

[0067] 11-driving away detection component; 111-fifth magnetic steel;

[0068] 12-image detection component; 121-trackside cabinet; 122-trackside camera;

[0069] 13- Preprocessing components. DETAILED DESCRIPTION

[0070] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0071] Embodiment 1:

[0072] like Figure 1 and 6 As shown, an embodiment of the present invention provides a device for detecting the offset of a train wheel, comprising a base 2, a longitudinal detection component 3 and a transverse detection component 4; the base 2 is arranged on one side of a rail 1 on which a train travels; the longitudinal detection component 3 comprises a longitudinal flaw detection plate 31 and a longitudinal support member 32, the longitudinal support member 32 is fixed on the base 2, the longitudinal flaw detection plate 31 is fixedly connected to the longitudinal support member 32, and under the supporting force of the longitudinal support member 32, the longitudinal flaw detection plate 31 is kept horizontally arranged on one side of the rail 1; the transverse detection component 4 comprises a transverse flaw detection plate 41 and a transverse support member 42, the transverse support member 42 is fixed on the base 2, the transverse flaw detection plate 41 is fixedly connected to the transverse support member 42, and under the supporting force of the transverse support member 42, the transverse flaw detection plate 41 is kept vertically arranged on one side of the rail 1.

[0073] like Figure 2 As shown, specifically in this embodiment, the longitudinal support member 32 includes a longitudinal base 321, a first longitudinal connecting seat, a second longitudinal connecting seat, a plurality of longitudinal connecting rods 324 and a longitudinal elastic member 325; the longitudinal base 321 is arranged on the side wall of the base close to the rail 1; the first longitudinal connecting seat includes a plurality of first longitudinal shaft seats 322, and the plurality of first longitudinal shaft seats 322 are distributed and arranged on the top of the longitudinal base 321; the second longitudinal connecting seat includes a plurality of second longitudinal shaft seats 323, and the plurality of second longitudinal shaft seats 323 are distributed and arranged on the bottom of the longitudinal flaw detection plate 31; the number of the second longitudinal shaft seats 323 is the same as that of the first longitudinal shaft seats 322; the ends of the plurality of longitudinal connecting rods 324 and the longitudinal elastic member 325 are all provided with longitudinal rotating shafts 326, and the plurality of longitudinal connecting rods 324 and the longitudinal elastic member 325 are rotatably connected between the corresponding first longitudinal shaft seats 322 and the second longitudinal shaft seats 323 through the longitudinal rotating shafts 326 respectively.

[0074] like Figure 3As shown, specifically in this embodiment, the transverse support member 42 includes a transverse base 421, a first transverse connecting seat, a second transverse connecting seat, a plurality of transverse connecting rods 424 and a transverse elastic member 425; the transverse base 421 is arranged on the side wall on the upper side of the base 2; the first transverse connecting seat includes a plurality of first transverse shaft seats 422, and the plurality of first transverse shaft seats 422 are distributed on the side wall of the transverse base 421 close to the rail 1; the second transverse connecting seat includes a plurality of second transverse shaft seats 423, and the plurality of second transverse shaft seats 423 are distributed on the side wall of the transverse flaw detection plate 41 away from the rail 1; the number of the second transverse shaft seats 423 is the same as that of the first transverse shaft seats 422; the ends of the plurality of transverse connecting rods 424 and the transverse elastic member 425 are all provided with transverse rotating shafts 426, and the plurality of transverse connecting rods 424 and the transverse elastic member 425 are rotatably connected between the corresponding first transverse shaft seats 422 and the second transverse shaft seats 423 through the transverse rotating shafts 426.

[0075] like Figure 4 As shown, specifically in this embodiment, the longitudinal support member 32 further includes a longitudinal support 327, a longitudinal encoder 328 and a longitudinal coupling 329; the longitudinal support 327 is fixed on the inner side wall of the base 2; the longitudinal encoder 328 is embedded in the longitudinal support 327; the input end of the longitudinal coupling 329 is connected to the longitudinal shaft 326 of any longitudinal connecting rod 324, and the output end of the longitudinal coupling 329 is connected to the input end of the longitudinal encoder 328. The transverse support member 42 further includes a transverse support 427, a transverse encoder 428 and a transverse coupling 429; the transverse support 427 is fixed on the inner side wall of the base 2; the transverse encoder 428 is embedded in the transverse support 427; the input end of the transverse coupling 428 is connected to the transverse shaft 426 of any transverse connecting rod 424, and the output end of the transverse coupling 428 is connected to the input end of the transverse encoder 429.

[0076] like Figure 5 As shown, specifically in this embodiment, the detection device also includes a rail clamp 5, which includes a fixed base plate 51, a first clamp block 52, a second clamp block 53 and a bolt 54; at least one cross beam 55 is arranged in parallel on the upper surface of the fixed base plate 51, and the first clamp block 52 and the second clamp block 53 are fixed to both ends of the cross beam 55 by bolts 54; the fixed base plate 51 is arranged below the rail 1, and the first clamp block 52 and the second clamp block 53 are clamped at the bottom of the rail 1; the base 2 is fixed to the side wall on the upper side of the fixed base plate 51.

[0077] Embodiment 2:

[0078] like Figure 7As shown, an embodiment of the present invention provides a train wheel out-of-roundness detection system, comprising a direction detection component 7, a speed detection component 8, a wheel diameter detection component 9, an offset detection component 10 and a departure detection component 11 arranged in sequence along the rail 1, and an image acquisition component 12 is also arranged on one side of the speed detection component 11. Since two rails 1 form a group, the wheel diameter detection component 9 and the offset detection component 10 need to be arranged in duplicate, and are arranged on the two rails 1 respectively.

[0079] The direction detection component 7 is used to detect the direction of the train. Specifically, in this embodiment, it includes a first magnetic steel 71 and a second magnetic steel 72. The first magnetic steel 71 and the second magnetic steel 72 are arranged in parallel on the inner side of the rail 1. The direction of the train is determined by the order in which the train wheels pass through the first magnetic steel 71 and the second magnetic steel 72. Figure 7 In the embodiment, the first magnetic steel 71 is arranged on the right side of the second magnetic steel 72. When the first magnetic steel 71 senses the train wheel first and the second magnetic steel 72 senses the train wheel later, the train travels from right to left, and vice versa.

[0080] The speed detection component 8 is used to detect the passing speed of the train. Specifically in the present embodiment, it includes a third magnetic steel 81 and a fourth magnetic steel 82. The third magnetic steel 81 and the fourth magnetic steel 82 are arranged in parallel on the inner side of the rail 1. The passing speed of the train is calculated by the spacing between the third magnetic steel 81 and the fourth magnetic steel 82 along the rail 1 and the time interval for the train wheels to pass through the third magnetic steel 81 and the fourth magnetic steel 82, that is, the spacing divided by the time interval.

[0081] The wheel diameter detection component 9 is used to detect the wheel point cloud coordinates of the train wheels. Specifically in this embodiment, an existing mature three-dimensional scanner is used to detect the wheel point cloud coordinates of the train wheels.

[0082] The offset detection assembly 10 includes multiple offset detection devices, each of which adopts the train wheel offset detection device as in the above-mentioned embodiment 1; multiple offset detection devices are distributed on the inner side of the rail 1, and the distribution distance of multiple offset detection devices along the rail 1 is greater than the circumference of the train wheel; the offset detection assembly is used to detect the offset of the train wheel.

[0083] The departure detection component 11 is used to detect the train departure signal, and includes a fifth magnetic steel 111. The fifth magnetic steel 111 is arranged on the inner side of the rail 1. When the first magnetic steel 71, the second magnetic steel 72, the third magnetic steel 81, the fourth magnetic steel 82 and the fifth magnetic steel 111 are triggered the same number of times, a train departure signal is generated.

[0084] The image acquisition component 12 is used to acquire train images, and includes a trackside cabinet 121 and a trackside camera 122 .

[0085] The detection system also includes a pretreatment component 13, which includes a roller brush, a roller brush driving mechanism and a purge mechanism; the roller brush driving mechanism and the purge mechanism are arranged on the inner side of the rail 1, and the roller brush is arranged at the output end of the roller brush driving mechanism. When the train wheels pass by, the roller brush is driven by the roller brush driving mechanism to rotate in the opposite direction relative to the train wheels to clean the edges of the train wheels, and the purge mechanism purges the roller brush.

[0086] Embodiment three:

[0087] An embodiment of the present invention provides a method for detecting the out-of-roundness of a train wheel. Based on the above-mentioned detection system, the detection method comprises the following steps:

[0088] Step S1, in response to the direction detection component detecting the travel direction of the train, and the travel direction of the train is a preset direction, the speed detection component detects the passing speed of the train, the wheel diameter detection component detects the point cloud coordinates of the train wheels, the offset detection component detects the offset of the train wheels, the departure detection component detects the departure signal of the train, and the image acquisition component is adjusted based on the passing speed of the train to collect the image of the train (such as the technical means provided by patent CN201510938317.4, which will not be introduced in detail in the present invention);

[0089] Step S2, calculating the out-of-roundness of the train wheel based on the point cloud coordinates and offset of the train wheel;

[0090] Step S3, identifying train vehicle information based on the train image;

[0091] Step S4: based on the departure signal of the train, determine that the current round detection is completed, and integrate the train wheel out-of-roundness and train vehicle information and upload them.

[0092] The step of calculating the out-of-roundness of the train wheel based on the point cloud coordinates and the offset of the train wheel comprises:

[0093] Calculate the train wheel lateral offset compensation value based on the train wheel point cloud coordinates and offset

[0094]

[0095] Where m is the lateral distance from the contact point between the train wheel tread and the rail to the inner side wall of the train wheel when there is no deviation, and X ni is the lateral offset of the ith sampling point collected by the nth offset detection device; f(m), f(m+X ni ) is the lateral distance m from the inner side wall of the train wheel to the lowest point of the train wheel tread and the distance m+X ni The vertical coordinate of the point cloud in the train wheel coordinate system;

[0096] Calculate the rail contact point offset compensation value based on the pre-stored rail point cloud data

[0097]

[0098] Where a is the lateral distance from the contact point between the train wheel tread and the rail to the outer side wall of the rail when there is no deviation, g(a), g(a+X ni ) is the lateral distance a from the outer side wall of the rail to the lowest point of the train wheel tread and the distance a+X ni The vertical coordinate of the point cloud in the rail coordinate system;

[0099] Take the three point cloud coordinates in the train wheel coordinate system and fit the diameter D of the train wheel;

[0100] According to the lateral offset compensation value Lateral offset compensation value The diameter D is used to calculate the radius r corresponding to the i-th sampling point collected by the n-th offset detection device. ni :

[0101] r ni =D / 2-(H m +Y ni +ΔY ni )

[0102]

[0103] In the formula, H m Y is the longitudinal distance from the base point at the transverse distance m from the inner side wall of the train wheel to the lowest point of the train wheel flange. ni The longitudinal offset of the ith sampling point collected by the nth offset detection device;

[0104] According to the radius value r corresponding to each sampling point ni Calculate the out-of-roundness of train wheels.

[0105] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may 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.

[0106] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0107] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0108] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0109] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for detecting out-of-roundness of train wheels, characterized in that: include: The out-of-roundness of the train wheel is calculated based on the point cloud coordinates and offset of the train wheel, specifically including: Calculate the train wheel lateral offset compensation value based on the train wheel point cloud coordinates and offset : ； In the formula, It is the lateral distance from the contact point between the train wheel tread and the rail to the inner side wall of the train wheel when there is no deviation. For the The offset detection device collects the The lateral offset of the sampling point; The lateral distance from the inner side wall of the train wheel to the lowest point of the train wheel tread and distance The vertical coordinate of the point cloud in the train wheel coordinate system; Calculate the rail contact point offset compensation value based on the pre-stored rail point cloud data : ； In the formula, It is the lateral distance from the contact point between the train wheel tread and the rail to the outer side wall of the rail when there is no deviation. The horizontal distance from the outer side wall of the rail to the lowest point of the train wheel tread and distance The vertical coordinate of the point cloud in the rail coordinate system; Take the three point cloud coordinates in the train wheel coordinate system and fit the diameter of the train wheel ; According to the lateral offset compensation value , lateral offset compensation value And diameter Calculate the The offset detection device collects the Sampling point corresponding to the radius value : ； ； In the formula, The lateral distance from the inner side wall of the train wheel to the tread of the train wheel The longitudinal distance from the base point to the lowest point of the train wheel flange, For the The offset detection device collects the The longitudinal offset of the sampling point; According to the radius value corresponding to each sampling point Calculate the out-of-roundness of train wheels; Wherein, the offset detection device comprises: The base is arranged on the side of the rails on which the train travels; A longitudinal detection assembly, comprising a longitudinal flaw detection plate and a longitudinal support member, wherein the longitudinal support member is fixed on the base, the longitudinal flaw detection plate is fixedly connected to the longitudinal support member, and under the supporting force of the longitudinal support member, the flaw detection surface of the longitudinal flaw detection plate is kept horizontally arranged on one side of the rail; The transverse detection component includes a transverse flaw detection plate and a transverse support member, wherein the transverse support member is fixed on the base, the transverse flaw detection plate is fixedly connected to the transverse support member, and its flaw detection surface is kept vertically arranged on one side of the rail under the supporting force of the transverse support member.

2. The method for detecting out-of-roundness of train wheels according to claim 1, characterized in that: The longitudinal support member comprises: A longitudinal base is arranged on a side wall of the base close to the rail; A first longitudinal connecting seat, comprising a plurality of first longitudinal shaft seats, wherein the plurality of first longitudinal shaft seats are distributed on the top of the longitudinal base; The second longitudinal connecting seat comprises a plurality of second longitudinal shaft seats, wherein the plurality of second longitudinal shaft seats are distributed and arranged at the bottom of the longitudinal flaw detection plate; the number of the second longitudinal shaft seats is the same as that of the first longitudinal shaft seats; Multiple longitudinal connecting rods and longitudinal elastic members, the ends of the multiple longitudinal connecting rods and longitudinal elastic members are all provided with longitudinal rotating shafts, and the multiple longitudinal connecting rods and longitudinal elastic members are rotatably connected between the corresponding first longitudinal shaft seat and the second longitudinal shaft seat through the longitudinal rotating shafts.

3. The method for detecting out-of-roundness of train wheels according to claim 2, characterized in that: The longitudinal support member also includes: A longitudinal bracket, fixed to the inner side wall of the base; A longitudinal encoder, embedded in the longitudinal bracket; A longitudinal coupling, wherein the input end of the longitudinal coupling is connected to the longitudinal rotating shaft of any of the longitudinal links, and the output end of the longitudinal coupling is connected to the input end of the longitudinal encoder.

4. The method for detecting out-of-roundness of train wheels according to claim 1, characterized in that: The lateral support member comprises: A transverse base, arranged on the side wall on the upper side of the base; A first transverse connecting seat, comprising a plurality of first transverse shaft seats, wherein the plurality of first transverse shaft seats are distributed on a side wall of the transverse base close to the rail; A second transverse connecting seat, comprising a plurality of second transverse shaft seats, wherein the plurality of second transverse shaft seats are distributed on a side wall of the transverse flaw detection plate away from the rail; the number of the second transverse shaft seats is the same as that of the first transverse shaft seats; A plurality of transverse connecting rods and transverse elastic members, ends of which are provided with transverse rotating shafts, and the plurality of transverse connecting rods and transverse elastic members are rotatably connected between the corresponding first transverse shaft seat and the second transverse shaft seat through the transverse rotating shafts.

5. The method for detecting out-of-roundness of train wheels according to claim 4, characterized in that: The lateral support member further comprises: A transverse bracket, fixed to the inner side wall of the base; A transverse encoder, embedded in the transverse bracket; A transverse coupling, wherein the input end of the transverse coupling is connected to the transverse rotating shaft of any of the transverse connecting rods, and the output end of the transverse coupling is connected to the input end of the transverse encoder.

6. The method for detecting out-of-roundness of train wheels according to claim 1, characterized in that: The detection device also includes a rail clamp, which includes a fixed base plate, a first clamp block, a second clamp block and bolts; at least one cross beam is arranged in parallel on the upper surface of the fixed base plate, and the first clamp block and the second clamp block are fixed to the two ends of the cross beam by bolts; the fixed base plate is arranged below the rail, and the first clamp block and the second clamp block are clamped at the bottom of the rail; the base is fixed to the side wall on the upper side of the fixed base plate.

7. A train wheel out-of-roundness detection system, characterized in that: It comprises a direction detection component, a speed detection component, a wheel diameter detection component, an offset detection component and a departure detection component which are sequentially arranged along the rail, and an image acquisition component is also arranged on one side of the speed detection component; the offset detection component comprises a plurality of offset detection devices, and the plurality of offset detection devices are distributed and arranged on the inner side of the rail, and the distribution distance of the plurality of offset detection devices along the rail is greater than the circumference of the train wheel; the direction detection component is used to detect the direction of travel of the train, the speed detection component is used to detect the passing speed of the train, the wheel diameter detection component is used to detect the point cloud coordinates of the train wheel, the offset detection component is used to detect the offset of the train wheel, the departure detection component is used to detect the departure signal of the train, and the image acquisition component is used to collect the train image; Wherein, the offset detection device comprises: The base is arranged on the side of the rails on which the train travels; A longitudinal detection assembly, comprising a longitudinal flaw detection plate and a longitudinal support member, wherein the longitudinal support member is fixed on the base, the longitudinal flaw detection plate is fixedly connected to the longitudinal support member, and under the supporting force of the longitudinal support member, the flaw detection surface of the longitudinal flaw detection plate is kept horizontally arranged on one side of the rail; A transverse detection assembly, comprising a transverse flaw detection plate and a transverse support member, wherein the transverse support member is fixed on the base, the transverse flaw detection plate is fixedly connected to the transverse support member, and under the supporting force of the transverse support member, the flaw detection surface of the transverse flaw detection plate is kept vertically arranged on one side of the rail; The detection method of the detection system comprises: In response to the direction detection component detecting the travel direction of the train, and the travel direction of the train is a preset direction, the speed detection component detects the passing speed of the train, the wheel diameter detection component detects the point cloud coordinates of the train wheels, the offset detection component detects the offset of the train wheels, the departure detection component detects the departure signal of the train, and the image acquisition component is used to adjust the acquisition interval time of the image acquisition component based on the passing speed of the train so as to acquire an image of the train based on the image acquisition component; Calculate the out-of-roundness of the train wheel based on the point cloud coordinates and offset of the train wheel; Based on the train image, train vehicle information is identified; Based on the departure signal of the train, it is determined that the current wheel detection is completed, and the train wheel out-of-roundness and train vehicle information are integrated and uploaded; The step of calculating the out-of-roundness of the train wheel based on the point cloud coordinates and the offset of the train wheel comprises: Calculate the train wheel lateral offset compensation value based on the train wheel point cloud coordinates and offset : ； In the formula, It is the lateral distance from the contact point between the train wheel tread and the rail to the inner side wall of the train wheel when there is no deviation. For the The offset detection device collects the The lateral offset of the sampling point; The lateral distance from the inner side wall of the train wheel to the lowest point of the train wheel tread and distance The vertical coordinate of the point cloud in the train wheel coordinate system; Calculate the rail contact point offset compensation value based on the pre-stored rail point cloud data : ； In the formula, It is the lateral distance from the contact point between the train wheel tread and the rail to the outer side wall of the rail when there is no deviation. The horizontal distance from the outer side wall of the rail to the lowest point of the train wheel tread and distance The vertical coordinate of the point cloud in the rail coordinate system; Take the three point cloud coordinates in the train wheel coordinate system and fit the diameter of the train wheel ; According to the lateral offset compensation value , lateral offset compensation value And diameter Calculate the The offset detection device collects the Sampling point corresponding to the radius value : ； ； In the formula, The lateral distance from the inner side wall of the train wheel to the tread of the train wheel The longitudinal distance from the base point to the lowest point of the train wheel flange, For the The offset detection device collects the The longitudinal offset of the sampling point; According to the radius value corresponding to each sampling point Calculate the out-of-roundness of train wheels.

8. The train wheel out-of-roundness detection system according to claim 7, characterized in that: The detection system also includes a pretreatment component, which includes a roller brush, a roller brush driving mechanism and a purge mechanism; the roller brush driving mechanism and the purge mechanism are arranged on the inner side of the rail, and the roller brush is arranged at the output end of the roller brush driving mechanism. When the train wheels pass by, the roller brush is driven by the roller brush driving mechanism to rotate in the opposite direction relative to the train wheels to clean the edges of the train wheels, and the purge mechanism purges the roller brush.

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