CN111979859A - Track irregularity detection system and method - Google Patents
Track irregularity detection system and method Download PDFInfo
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- CN111979859A CN111979859A CN202010836884.XA CN202010836884A CN111979859A CN 111979859 A CN111979859 A CN 111979859A CN 202010836884 A CN202010836884 A CN 202010836884A CN 111979859 A CN111979859 A CN 111979859A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B35/00—Applications of measuring apparatus or devices for track-building purposes
- E01B35/12—Applications of measuring apparatus or devices for track-building purposes for measuring movement of the track or of the components thereof under rolling loads, e.g. depression of sleepers, increase of gauge
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B35/00—Applications of measuring apparatus or devices for track-building purposes
- E01B35/06—Applications of measuring apparatus or devices for track-building purposes for measuring irregularities in longitudinal direction
Abstract
The invention provides a track irregularity detection system and a method thereof, wherein the system comprises: the system comprises a data acquisition unit, a space-time synchronization unit and a data processing unit, wherein the space-time synchronization unit is used for: receiving mileage information and speed information of an operating train and sending the mileage information and speed information to a data acquisition unit; the data acquisition unit is used for: receiving mileage information and speed information; collecting vertical acceleration information of a left axle box and a right axle box of a set axle of a set carriage of an operating train; sending the mileage information, the speed information and the vertical acceleration information to a data processing unit; the data processing unit is used for: and acquiring track height irregularity information according to the received mileage information, speed information and vertical acceleration information. The invention can detect the irregularity of the track, is applied to the operation train, and has high accuracy and high detection speed.
Description
Technical Field
The invention relates to the technical field of railway tracks, in particular to a track irregularity detection system and method.
Background
The rail irregularity means that the actual linear position and the design linear position of the left and right strand steel rails have deviation, and the wavelength, the amplitude and the periodic characteristics of the rail irregularity have important influences on the running safety and the riding comfort of the vehicle. The rail state monitoring has important significance for mastering the rail irregularity characteristics and distribution, timely providing rail maintenance and maintenance basis and recovering the rail smoothness state. Therefore, the detection of the rail irregularity is one of key technologies for mastering the service state of a line and guaranteeing the continuous and safe operation of a train.
At present, the detection method of rail irregularity mainly comprises a chord measuring method and an inertia reference method, a plurality of rows of comprehensive detection trains are owned by China to periodically inspect the existing operation high-speed railway, and an inertia reference system is adopted and an optical system is combined to detect the dynamic geometric shape and position of the rail. However, the development, maintenance and dispatching operation of the comprehensive detection train need great investment, the same existing high-speed rail can only be subjected to two-detection and three-detection every month, the detection period is long, the rail state detection cannot be carried out timely, all-weather rail state online monitoring is crucial to the safety and reliability of high-speed rail high-density transportation in the future, the detection of the rail state through simple carrying-type equipment is a good solution undoubtedly, and the comprehensive detection train is developed towards the direction at home and abroad. The prior art also provides some rail irregularity detection methods, but most of the methods only stay in a theoretical model stage and are not practically applied. And some detection methods with practical application acquire rail irregularity by filtering and integrating the acceleration of the actual measurement vehicle body, the bogie and the axle box, but the difference between the reduction result and the actual irregularity is very large.
Therefore, a detection method for detecting the track irregularity with high accuracy, which can be carried on an operating train, is lacking at present.
Disclosure of Invention
The embodiment of the invention provides a track irregularity detection system, which is used for detecting track irregularity, has high accuracy and high detection speed, is applied to an operating train, and comprises the following components: a data acquisition unit, a time-space synchronization unit and a data processing unit, wherein,
the space-time synchronization unit is used for: receiving mileage information and speed information of an operating train and sending the mileage information and speed information to a data acquisition unit;
the data acquisition unit is used for: receiving mileage information and speed information; collecting vertical acceleration information of a left axle box and a right axle box of a set axle of a set carriage of an operating train; sending the mileage information, the speed information and the vertical acceleration information to a data processing unit;
the data processing unit is used for: and acquiring track height irregularity information according to the received mileage information, speed information and vertical acceleration information.
The embodiment of the invention provides a track irregularity detection method, which is applied to a track irregularity detection system, is used for track irregularity detection, has high accuracy and high detection speed, and is applied to an operating train, and the method comprises the following steps:
receiving mileage information and speed information of an operating train;
collecting vertical acceleration information of a left axle box and a right axle box of a set axle of a set carriage of an operating train;
and acquiring track height irregularity information according to the received mileage information, speed information and vertical acceleration information.
The embodiment of the invention also provides computer equipment, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the track irregularity detection method when executing the computer program.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program for executing the track irregularity detecting method is stored in the computer-readable storage medium.
In the embodiment of the invention, the track irregularity detection system comprises a data acquisition unit, a time-space synchronization unit and a data processing unit, wherein the time-space synchronization unit is used for: receiving mileage information and speed information of an operating train and sending the mileage information and speed information to a data acquisition unit; the data acquisition unit is used for: receiving mileage information and speed information; collecting vertical acceleration information of a left axle box and a right axle box of a set axle of a set carriage of an operating train; sending the mileage information, the speed information and the vertical acceleration information to a data processing unit; the data processing unit is used for: and acquiring track height irregularity information according to the received mileage information, speed information and vertical acceleration information. In the system, the system can be applied to an operation train in a carrying mode, the vertical acceleration information of the left axle box and the right axle box of the set axle of the set carriage of the operation train is collected through the data acquisition unit, and the height irregularity information of the track can be quickly and accurately obtained by combining the received mileage information and speed information.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a schematic diagram of a track irregularity detection system in an embodiment of the invention;
FIG. 2 is a schematic diagram of an arrangement of acceleration sensors in an embodiment of the present invention;
FIG. 3 is a schematic diagram of the operation of a data processing unit according to an embodiment of the present invention;
FIG. 4 is a detailed flowchart of an embodiment of the present invention for obtaining track irregularity information using a data processing unit;
fig. 5 and fig. 6 are time domain waveforms of actually measured vertical acceleration information of left and right axle boxes in a constant speed running section of an operating train according to an embodiment of the present invention;
FIG. 7 is a comparison graph of the track irregularity waveform obtained by the system of the present invention for operating the left axle box of a train in a uniform velocity travel section according to the present invention and the conventional integrated train detection system;
FIG. 8 is a comparison graph of the frequency spectrum of the unevenness of the track obtained by the system of the present invention for operating the left axle box of the train in the uniform velocity running section and the conventional integrated train detection system in the embodiment of the present invention;
FIG. 9 is a comparison graph of the track irregularity waveform obtained by the system of the present invention and the conventional integrated train detecting system for operating the right axle box of the train at the uniform speed running section according to the embodiment of the present invention;
FIG. 10 is a comparison graph of the frequency spectrum of the track irregularity obtained by the system of the present invention operating the right axle box of the train in the uniform speed running section and the conventional integrated train detection system in the embodiment of the present invention;
FIGS. 11 and 12 are time domain waveforms of measured vertical acceleration information of left and right axle boxes of an operating train variable speed drive section according to an embodiment of the present invention;
FIG. 13 is a schematic diagram illustrating the variation of the operating train speed according to an embodiment of the present invention;
FIG. 14 is a comparison of the track irregularity waveform obtained by the system of the present invention operating the left axle box of a train in a variable speed drive section in accordance with the present invention versus a prior art integrated train detection system;
FIG. 15 is a comparison of the frequency spectrum of the irregularity of the track obtained by the system of the present invention operating the left axle box of the train in the variable speed drive section and the prior integrated train detection system in accordance with the embodiment of the present invention;
FIG. 16 is a comparison of the track irregularity waveform obtained by the system of the present invention operating the right axle box of a train in a variable speed drive section in accordance with the present invention versus a prior art integrated train detection system;
FIG. 17 is a comparison of the frequency spectrum of the track irregularity obtained by the system of the present invention operating the right axle box of the train in the variable speed drive section and the conventional integrated train detection system in accordance with the present embodiment;
FIG. 18 is a flow chart of a track irregularity detecting method according to an embodiment of the present invention;
FIG. 19 is a diagram of a computer device in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In the description of the present specification, the terms "comprising," "including," "having," "containing," and the like are used in an open-ended fashion, i.e., to mean including, but not limited to. Reference to the description of the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The sequence of steps involved in the embodiments is for illustrative purposes to illustrate the implementation of the present application, and the sequence of steps is not limited and can be adjusted as needed.
Fig. 1 is a schematic diagram of a track irregularity detecting system according to an embodiment of the present invention, as shown in fig. 1, the system includes: a spatio-temporal synchronization unit 101, a data acquisition unit 102 and a data processing unit 103, wherein,
the space-time synchronization unit 101 is configured to: receiving mileage information and speed information of an operating train and sending the mileage information and speed information to the data acquisition unit 102;
the data acquisition unit 102 is configured to: receiving mileage information and speed information; collecting vertical acceleration information of a left axle box and a right axle box of a set axle of a set carriage of an operating train; the mileage information, the speed information and the vertical acceleration information are sent to the data processing unit 103;
the data processing unit 103 is configured to: and acquiring track height irregularity information according to the received mileage information, speed information and vertical acceleration information.
The system provided by the embodiment of the invention can be applied to an operating train in a carrying mode, the vertical acceleration information of the left axle box and the right axle box of the set axle of the set carriage of the operating train is acquired through the data acquisition unit, and the height and irregularity information of the track can be quickly and accurately acquired by combining the received mileage information and speed information.
During specific implementation, the time-space synchronization unit is used for receiving mileage information and speed information of an operating train, the mileage information and the speed information are respectively data of mileage and speed changing along with time, and the vertical acceleration information acquired by the data acquisition unit is data of vertical acceleration changing along with time, so that mileage labels and speed labels can be marked on the mileage information and the speed information for the vertical acceleration information, and synchronization of the data on time and space is realized.
The time-space synchronization unit receives the mileage information and the speed information of the operation train sent by the comprehensive train detection system through the reflective memory card, and forwards the mileage information and the speed information to the data acquisition unit through the CAN port to be stored in a channel simulation mode. The mileage information is accurately positioned by adopting various modes such as a GPS, a radio frequency tag, a high-precision encoder and the like, the positioning precision reaches 2m under the running speed of 350km/h, and the track diseases are conveniently and accurately searched, rechecked and processed.
In one embodiment, the data acquisition unit comprises two acceleration sensors, a data measurement instrument, wherein,
two acceleration sensor locate the left axle box and the right axle box of setting for the axle of setting for the carriage of operation train respectively, are used for respectively: measuring the vertical acceleration information of the left axle box and the vertical acceleration information of the right axle box, and sending the information to the data measuring instrument;
the data measurement instrument is used for: receiving mileage information and speed information sent by a time-space synchronization unit; receiving vertical acceleration information sent by two acceleration sensors; and sending the mileage information, the speed information and the vertical acceleration information to a data processing unit.
In the above embodiment, the lines of the data acquisition units and the like can be determined according to the types, the number and the parameters of the acceleration sensors, the original parameters can be set, and the vertical acceleration information, the mileage information and the speed information can be continuously and synchronously stored in the storage media such as the hard disk, so as to generate the CIT format file.
The data measuring instrument can supply power to two acceleration sensors, the two acceleration sensors are respectively arranged on a left axle box and a right axle box of a set axle of a set compartment of an operating train, and fig. 2 is a layout schematic diagram of the acceleration sensors in the embodiment of the invention. The range selection of the acceleration sensor needs to consider the vibration acceleration amplitude range in a frequency band to be analyzed, also needs to consider the vibration acceleration amplitude range in the frequency band which can be sensed by the acceleration sensor, also considers the impact of the vibration environment, and also possibly adjusts the range of the acceleration sensor according to the analysis of actually acquired data so as to improve the signal-to-noise ratio. In the embodiment of the invention, the range of the acceleration sensor is 200g, the sampling frequency is 5000Hz, the weight is about 300g, and the acceleration sensor has small volume and light weight.
In one embodiment, the data acquisition unit further comprises two sealed equipment tools, wherein the two acceleration sensors are respectively fixed inside one equipment tool.
In the embodiment, the technical conditions of the installation interface are determined according to the requirement of the motor train unit on the installation of the track irregularity detection system under the condition that the running speed is 350km/h, and the equipment tool solves the problems of electromagnetic interference, moisture-proof sealing, component reliability and the like of a acceleration sensor in the track irregularity detection system.
The equipment tool adopts PA1010 glass fiber reinforced type, and has the characteristics of excellent wear resistance, good oil resistance, higher mechanical strength, superior ductility and the like, and has good normal-temperature and low-temperature impact properties. The equipment tool is manufactured by integral machining, and has the advantages of light weight, high dimensional precision and good insulativity. Acceleration sensor fixes inside equipment frock, uses O type sealing washer sealed between frock box body and lid, can effectively waterproof dustproof. 4 phi 8 mounting holes are arranged by equipment workers and are used for being fixed with a vehicle connecting plate, and the mounting hole distance is 66 mm multiplied by 72mm, so that the equipment workers are convenient to mount and replace.
In an embodiment, the data processing unit is specifically configured to:
performing equal-space resampling on the vertical acceleration information based on the received mileage information and speed information to obtain second processing information;
processing the second processing information by adopting a double integral filter to obtain displacement information;
processing the displacement information by adopting a smoothing filter to obtain the processed displacement information;
and determining the displacement information obtained by subtracting the displacement information as track height irregularity information.
Fig. 3 is a schematic diagram of a working principle of the data processing unit in the embodiment of the present invention, that is, by performing equal-space resampling and double integration on vertical acceleration information, and combining smoothing filtering, track height irregularity information can be obtained.
In an embodiment, the data processing unit is further configured to:
processing the received vertical acceleration information by adopting a low-pass filter to obtain first processing information before performing equal-space resampling on the vertical acceleration information based on the received mileage information and speed information to obtain second processing information; performing equal-space resampling on the first processing information based on the received mileage information and speed information to obtain second processing information;
before the double integral filter is adopted to process the second processing information to obtain the displacement information, a depolarization filter is adopted to process the second processing information to obtain third processing information; and processing the third processing information by adopting a double integral filter to obtain displacement information.
With the above embodiments, a detailed flowchart of obtaining track height irregularity information by using the data processing unit is shown in fig. 4, and specifically includes:
1) processing the received vertical acceleration information by adopting a low-pass filter to obtain first processing information;
the received vertical acceleration information is generally a CIT format file, aliasing components are generated at a low frequency position if equal-space resampling is directly carried out on the vertical acceleration information at equal time intervals, and therefore unnecessary high-frequency components are removed through a low-pass filter before the equal-space resampling. For example, the vehicle speed is within the range of 100-350 km/h, the excitation frequency range of short wave irregularity with the wavelength of 1.5m to the acceleration sensor is 18.52-64.81 Hz, and the extracted effective signals need to be concentrated below the frequency range.
2) Performing equal-space resampling on the first processing information based on the received mileage information and speed information to obtain second processing information;
in the embodiment of the invention, the integral operation is carried out based on the vertical acceleration information (which is a space signal), and the actually measured vertical acceleration information is sampled at equal time intervals, so that the vertical acceleration information sampled at equal time intervals is resampled and converted into the equal space signal before the integral operation.
3) Processing the second processing information by adopting a depolarization filter to obtain third processing information;
because the measured vertical acceleration information has a direct current component and the direct current component still exists after the equal space resampling, the direct current component needs to be removed through a depolarization filter before the integration.
4) Processing the third processing information by adopting a double integral filter to obtain displacement information;
in one embodiment, the transfer function of the double integration filter is as follows:
wherein, TnIs the time interval between the nth point and the n-1 st point; t isn-1Is TnThe previous value of (a).
5) Processing the displacement information by adopting a smoothing filter to obtain the processed displacement information;
the displacement information obtained by double integration contains various wavelength components and drifts generated by integration, and a smoothing filter is needed in order to eliminate trend terms and obtain track irregularity in a specific wavelength range. Of course, it is understood that other methods may be used to design the smoothing filter, and all the related variations are within the scope of the present invention.
6) And determining the displacement information obtained by subtracting the displacement information as track height irregularity information.
The track height irregularity information can synchronously output waveforms according to the spatial mileage positions.
Two specific embodiments are given below to illustrate specific examples of the application of the track irregularity detecting system.
Case one: operation train uniform speed driving section
Taking a section of a line K253+000-K256+000 with the full length of 3Km as an example, the operation train runs at a constant speed of 245Km/h in the section. Fig. 5 and fig. 6 are time domain waveforms of actually measured vertical acceleration information of left and right axle boxes in a constant speed running section of an operating train according to an embodiment of the present invention. Fig. 7 is a comparison graph of track unevenness waveform obtained by the system of the invention for operating the left axle box of the train in the constant velocity travel section and the conventional integrated train detection system in the embodiment of the present invention, fig. 8 is a comparison graph of track unevenness waveform obtained by the system of the invention for operating the left axle box of the train in the constant velocity travel section and the conventional integrated train detection system in the embodiment of the present invention, fig. 9 is a comparison graph of track unevenness waveform obtained by the system of the invention for operating the right axle box of the train in the constant velocity travel section and the conventional integrated train detection system in the embodiment of the present invention, and fig. 10 is a comparison graph of track unevenness spectrum obtained by the system of the invention for operating the right axle box of the train in the constant velocity travel section and the conventional integrated train detection system in the embodiment of the present invention. Among them, the correlation coefficients of the track rugged waveform of fig. 7 and 9 are 0.6923 and 0.7026, respectively, and the correlation is strong. Meanwhile, the time domain waveform and the frequency spectrum characteristics of the two are well matched under the condition of constant speed, and the accuracy of the system is verified.
Case two: variable speed driving section of operation train
Taking a section of a line K175+000-K178+375 with a full length of 3.375Km as an example, fig. 11 and 12 are time domain waveforms of actually measured vertical acceleration information of left and right axle boxes of a variable speed running section of an operating train in the embodiment of the present invention, respectively, and fig. 13 is a schematic diagram of a change of a train speed of the operating train in the embodiment of the present invention, wherein the train speed is increased from 178Km/h to 225 Km/h. Fig. 14 is a comparison graph of track unevenness waveform obtained by the system of the invention for the left axle box of the train operated in the speed change traveling zone and the conventional integrated train detection system in the embodiment of the present invention, fig. 15 is a comparison graph of track unevenness waveform obtained by the system of the invention for the left axle box of the train operated in the speed change traveling zone and the conventional integrated train detection system in the embodiment of the present invention, fig. 16 is a comparison graph of track unevenness waveform obtained by the system of the invention for the right axle box of the train operated in the speed change traveling zone and the conventional integrated train detection system in the embodiment of the present invention, and fig. 17 is a comparison graph of track unevenness spectrum obtained by the system of the invention for the right axle box of the train operated in the speed change traveling zone and the conventional integrated train detection system in the embodiment of the present invention. Under the condition of variable-speed running, the time domain waveform and the frequency spectrum characteristics of the track unevenness obtained by the system and the comprehensive train detection system are well matched, and the accuracy of the system is also verified.
In summary, in the system provided in the embodiment of the present invention, the track irregularity detection system includes a data acquisition unit, a time-space synchronization unit, and a data processing unit, where the time-space synchronization unit is configured to: receiving mileage information and speed information of an operating train and sending the mileage information and speed information to a data acquisition unit; the data acquisition unit is used for: receiving mileage information and speed information; collecting vertical acceleration information of a left axle box and a right axle box of a set axle of a set carriage of an operating train; sending the mileage information, the speed information and the vertical acceleration information to a data processing unit; the data processing unit is used for: and acquiring track height irregularity information according to the received mileage information, speed information and vertical acceleration information. In the system, the vertical acceleration information of the left axle box and the right axle box of the set axle of the set carriage of the operating train is collected through the data acquisition unit, and the height irregularity information of the track can be quickly and accurately obtained by combining the received mileage information and speed information.
An embodiment of the present invention further provides a track irregularity detecting method, which is applied to the track irregularity detecting method described above, and as shown in fig. 18, is a flowchart of the track irregularity detecting method in the embodiment of the present invention, where the method includes:
and 1803, acquiring track height irregularity information according to the received mileage information, speed information and vertical acceleration information.
In summary, in the method provided in the embodiment of the present invention, the mileage information and the speed information of the operating train are received; collecting vertical acceleration information of a left axle box and a right axle box of a set axle of a set carriage of an operating train; and acquiring track height irregularity information according to the received mileage information, speed information and vertical acceleration information. In the process, the vertical acceleration information of the left axle box and the right axle box of the set axle of the set carriage of the operation train is collected, and the height irregularity information of the track can be quickly and accurately obtained by combining the received mileage information and speed information.
An embodiment of the present application further provides a computer device, and fig. 19 is a schematic diagram of a computer device in an embodiment of the present invention, where the computer device is capable of implementing all steps in the track irregularity detection method in the foregoing embodiment, and the computer device specifically includes the following contents:
a processor (processor)1901, a memory (memory)1902, a communication Interface (Communications Interface)1903, and a communication bus 1904;
the processor 1901, the memory 1902 and the communication interface 1903 complete communication with each other through the communication bus 1904; the communication interface 1903 is used for implementing information transmission among related devices such as server-side devices, detection devices, and client-side devices;
the processor 1901 is configured to call a computer program in the memory 1902, and when the processor executes the computer program, the processor implements all the steps of the track irregularity detecting method in the above-described embodiments.
An embodiment of the present application further provides a computer-readable storage medium, which can implement all the steps in the track irregularity detecting method in the above embodiment, where the computer-readable storage medium stores a computer program, and the computer program, when executed by a processor, implements all the steps of the track irregularity detecting method in the above embodiment.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may 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, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A rail irregularity detection system, comprising: a time-space synchronization unit, a data acquisition unit and a data processing unit, wherein,
the space-time synchronization unit is used for: receiving mileage information and speed information of an operating train and sending the mileage information and speed information to a data acquisition unit;
the data acquisition unit is used for: receiving mileage information and speed information; collecting vertical acceleration information of a left axle box and a right axle box of a set axle of a set carriage of an operating train; sending the mileage information, the speed information and the vertical acceleration information to a data processing unit;
the data processing unit is used for: and acquiring track height irregularity information according to the received mileage information, speed information and vertical acceleration information.
2. The rail irregularity detecting system of claim 1, wherein the data acquisition unit includes two acceleration sensors, a data measuring instrument, wherein,
two acceleration sensor locate the left axle box and the right axle box of setting for the axle of setting for the carriage of operation train respectively, are used for respectively: measuring the vertical acceleration information of the left axle box and the vertical acceleration information of the right axle box, and sending the information to the data measuring instrument;
the data measurement instrument is used for: receiving mileage information and speed information sent by a time-space synchronization unit; receiving vertical acceleration information sent by two acceleration sensors; and sending the mileage information, the speed information and the vertical acceleration information to a data processing unit.
3. The track irregularity detection system of claim 2, wherein the data acquisition unit further comprises two sealed equipment fixtures, wherein each of the two acceleration sensors is secured within one of the equipment fixtures.
4. The track irregularity detection system of claim 1, wherein the data processing unit is specifically configured to:
performing equal-space resampling on the vertical acceleration information based on the received mileage information and speed information to obtain second processing information;
processing the second processing information by adopting a double integral filter to obtain displacement information;
processing the displacement information by adopting a smoothing filter to obtain the processed displacement information;
and determining the displacement information obtained by subtracting the displacement information as track height irregularity information.
5. The track irregularity detection system of claim 4, wherein the data processing unit is further to:
processing the received vertical acceleration information by adopting a low-pass filter to obtain first processing information before performing equal-space resampling on the vertical acceleration information based on the received mileage information and speed information to obtain second processing information; performing equal-space resampling on the first processing information based on the received mileage information and speed information to obtain second processing information;
before the double integral filter is adopted to process the second processing information to obtain the displacement information, a depolarization filter is adopted to process the second processing information to obtain third processing information; and processing the third processing information by adopting a double integral filter to obtain displacement information.
6. The track irregularity detection system of claim 4, wherein the transfer function of the double integration filter is as follows:
wherein, TnIs the time interval between the nth point and the n-1 st point; t isn-1Is TnThe previous value of (a).
7. The rail irregularity detection system of claim 4, wherein the smoothing filter is generated using a fitting polynomial method, a high-pass filter method, or a wavelet transform method.
8. A rail irregularity detecting method applied to the rail irregularity detecting system according to any one of claims 1 to 7, comprising:
receiving mileage information and speed information of an operating train;
collecting vertical acceleration information of a left axle box and a right axle box of a set axle of a set carriage of an operating train;
and acquiring track height irregularity information according to the received mileage information, speed information and vertical acceleration information.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of claim 8 when executing the computer program.
10. A computer-readable storage medium storing a computer program for executing the method of claim 8.
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| CN115143933A (en) * | 2022-06-14 | 2022-10-04 | 中国铁道科学研究院集团有限公司 | Track line height irregularity detection method and device and vehicle-mounted track detection system |
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| CN113276905A (en) * | 2021-04-30 | 2021-08-20 | 中铁二院工程集团有限责任公司 | Identification method and measurement method for distinguishing track corrugation and wheel polygon abrasion |
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| AT526338B1 (en) * | 2022-10-25 | 2024-02-15 | Hp3 Real Gmbh | Method for the automatic evaluation of track measurement data |
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