Method for evaluating electromagnetic compatibility of train and wayside axle counter and related equipment

Abstract

The present disclosure provides a train and trackside axle counter electromagnetic compatibility evaluation method and related equipment, the method comprising: obtaining an electromagnetic wave signal emitted by a test train, and converting the electromagnetic wave signal into an analog voltage signal; based on a predetermined analysis mode, signal processing the analog voltage signal in a predetermined wave band to obtain a voltage value, and converting the voltage value into a magnetic field value; based on the magnetic field value and a predetermined magnetic field threshold in each analysis direction, obtaining an electromagnetic compatibility test evaluation result of the test train and the axle counter. The technical solution provided by the present disclosure provides an effective technical approach for electromagnetic compatibility testing between trains of each frequency band and full axle counter type and axle counters, and improves the test evaluation efficiency while ensuring the accuracy of the test evaluation result.

Description

Technical Field

[0001] This disclosure relates to the field of electromagnetic compatibility design technology, and in particular to an electromagnetic compatibility testing and evaluation method and related equipment for trains and trackside axle counters. Background Technology

[0002] An axle counter is a safety device used to detect whether train wheel axles occupy a section of track. Compared with track circuits, it has a series of advantages such as being unaffected by track conditions, not requiring track cutting or track insulation, and being suitable for long track sections. Therefore, it is favored by railway transportation departments in various countries.

[0003] With the widespread adoption of axle counters in railway ground signaling systems and the trend towards high voltage, high power, and high switching frequency in electrified vehicles, the electromagnetic compatibility (EMC) problem between the two is becoming increasingly serious. Due to the numerous types of axle counters, different operating signal standards, and overlapping operating frequency bands in the railway industry, the EMC assessment methods for different types of axle counters and their associated vehicles also differ. Currently, the domestic rail transit sector lacks a complete technical solution for EMC assessment and testing that covers the entire frequency band and all axle counter types. Summary of the Invention

[0004] In view of this, the purpose of this disclosure is to propose a method and related equipment for testing and evaluating the electromagnetic compatibility of trains and trackside axle counters.

[0005] To achieve the above objectives, the first aspect of this disclosure provides a method for testing and evaluating the electromagnetic compatibility of trains and trackside axle counters, comprising:

[0006] The electromagnetic wave signal emitted by the test train is acquired and converted into an analog voltage signal.

[0007] Based on a predetermined analysis mode, the analog voltage signal is processed in a predetermined band to obtain a voltage value, and the voltage value is converted into a magnetic field value.

[0008] The electromagnetic compatibility test evaluation results of the test train and the axle counter are obtained based on the magnetic field value and the predetermined magnetic field thresholds in several analysis directions.

[0009] Furthermore, the analysis mode is a spectrum analysis mode based on a specific axle counter type;

[0010] The process of processing the analog voltage signal in a predetermined band based on a predetermined analysis mode to obtain a voltage value, and then converting the voltage value into a magnetic field value, specifically includes:

[0011] The analog voltage signal is digitally filtered in the corresponding frequency band of the selected shaft counter to obtain the voltage value;

[0012] The voltage value after compensating the antenna coefficient is converted into the magnetic field value;

[0013] The electromagnetic compatibility test evaluation results of the test train and the axle counter are obtained based on the magnetic field value and preset magnetic field thresholds in several predetermined analysis directions, specifically including:

[0014] In response to determining that the components of the magnetic field value in each of the analysis directions are all less than the corresponding preset magnetic field threshold, the test train and the axle counter are electromagnetically compatible; otherwise, the test train and the axle counter are not electromagnetically compatible.

[0015] Furthermore, the analysis mode is a CCS TSI-based spectrum analysis mode;

[0016] The process of processing the analog voltage signal in a predetermined band based on a predetermined analysis mode to obtain a voltage value, and then converting the voltage value into a magnetic field value, specifically includes:

[0017] The voltage value is obtained by performing a short-time Fourier transform on the Out-band and In-band frequencies corresponding to the analog voltage signal.

[0018] The voltage value after compensating the antenna coefficient is converted into the magnetic field value;

[0019] The electromagnetic compatibility test evaluation results of the test train and the axle counter are obtained based on the magnetic field value and preset magnetic field thresholds in several predetermined analysis directions, specifically including:

[0020] In response to the determination that the components of the magnetic field value in each of the analysis directions are all less than the corresponding preset magnetic field threshold, the test train and the axle counter meet electromagnetic compatibility.

[0021] Furthermore, the electromagnetic compatibility test evaluation results of the test train and the axle counter obtained based on the magnetic field value and preset magnetic field thresholds in several predetermined analysis directions specifically include:

[0022] In response to determining that the component of the magnetic field value in the Out-band frequency band of any of the analysis directions is greater than the corresponding preset magnetic field threshold, the test train and the axle counter do not meet electromagnetic compatibility requirements.

[0023] Furthermore, the electromagnetic compatibility test evaluation results of the test train and the axle counter obtained based on the magnetic field value and preset magnetic field thresholds in several predetermined analysis directions specifically include:

[0024] In response to determining that the component of the magnetic field value in the In-band frequency band of any of the analysis directions is greater than the corresponding preset magnetic field value, the component of the voltage value in the In-band frequency band of the corresponding analysis direction is digitally filtered;

[0025] The filtering results are integrated with a preset overlap ratio and the maximum value is taken to obtain the corrected voltage value at each frequency point in the In-band.

[0026] The corrected voltage value after compensating the antenna coefficient is converted into a corrected magnetic field value;

[0027] In response to the determination that the corrected magnetic field value at each frequency point in the In-band is less than a preset magnetic field threshold, the test train and the axle counter are electromagnetically compatible; otherwise, the test train and the axle counter are not electromagnetically compatible.

[0028] Furthermore, the method also includes:

[0029] In response to the determination that the test train and the axle counter do not meet electromagnetic compatibility, the maximum exceeding frequency point is extracted in the time domain to obtain the time domain spectrum of the maximum exceeding frequency point;

[0030] Based on the speed information of the test train, the time-domain spectrum is converted into the magnetic field values ​​generated by each position of the test train to determine the abnormal magnetic field values.

[0031] Based on the abnormal magnetic field value, the target location where the test train caused the interference was determined.

[0032] Based on the same inventive concept, a second aspect of this disclosure provides an electromagnetic compatibility testing and evaluation device for trains and trackside axle counters, comprising:

[0033] Data acquisition module: configured to acquire electromagnetic wave signals emitted by the test train and convert the electromagnetic wave signals into analog voltage signals;

[0034] Data processing module: configured to perform signal processing on the analog voltage signal in a predetermined band based on a predetermined analysis mode to obtain a voltage value, and convert the voltage value into a magnetic field value;

[0035] The result determination module is configured to obtain the electromagnetic compatibility test evaluation results of the test train and the axle counter based on the magnetic field value and the preset magnetic field thresholds in several predetermined analysis directions.

[0036] Furthermore, the device also includes:

[0037] Interference localization module: configured to extract the time domain of the maximum out-of-range frequency point in response to determining that the test train and the axle counter do not meet electromagnetic compatibility, so as to obtain the time domain spectrum of the maximum out-of-range frequency point;

[0038] Based on the speed information of the test train, the time-domain spectrum is converted into the magnetic field values ​​generated by each position of the test train to determine the abnormal magnetic field values.

[0039] Based on the abnormal magnetic field value, the target location where the test train caused the interference was determined.

[0040] Based on the same inventive concept, a third aspect of this disclosure provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method described in the first aspect.

[0041] Based on the same inventive concept, the fourth aspect of this disclosure provides a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method described in the first aspect.

[0042] As described above, the electromagnetic compatibility (EMC) testing and evaluation method and related equipment for trains and trackside axle counters provided in this disclosure process the electromagnetic wave signals emitted by the train based on different analysis modes, and compare the processing results with standard limits to obtain the EMC testing and evaluation results for the train and axle counter. Furthermore, the location of the interference source of the test train is determined based on the test and evaluation results. The method of this disclosure can test the EMC of trains and trackside axle counters across the entire frequency band and all axle counter types, improving testing efficiency while ensuring testing accuracy. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in this disclosure or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a flowchart of the electromagnetic compatibility testing and evaluation method for trains and trackside axle counters according to an embodiment of this disclosure;

[0045] Figure 2 This is a scenario diagram illustrating the electromagnetic compatibility testing and evaluation of a train and a trackside axle counter according to an embodiment of this disclosure.

[0046] Figure 3 This is a schematic diagram illustrating the standard installation location of the low / high frequency antenna according to an embodiment of this disclosure;

[0047] Figure 4 This is a flowchart illustrating the process of determining the location of interference generated by the test train according to an embodiment of this disclosure;

[0048] Figure 5 This is a schematic diagram of the electromagnetic compatibility testing and evaluation device for trains and trackside axle counters according to an embodiment of the present disclosure.

[0049] Figure 6 This is a schematic diagram of the electronic device structure according to an embodiment of the present disclosure. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0051] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar words used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Words such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, but do not exclude other elements or objects.

[0052] As described in the background section, existing electromagnetic compatibility (EMC) testing and evaluation solutions for trains and trackside axle counters are insufficient to meet the needs. During the development of this disclosure, the applicant discovered that trains must undergo EMC evaluation and certification with the corresponding trackside axle counters before operating on lines equipped with them. However, axle counters come in various types with different operating modes and overlapping frequency bands, resulting in significantly different EMC evaluation methods for vehicles and axle counters. For example, European standards such as EN 50238-3 and EN 50617 specify relevant test methods and specific limit requirements for vehicle-to-axle counter magnetic field interference; China has also formulated the GB / T 28807.3 standard to manage the EMC of vehicles and axle counters. However, existing EMC testing and evaluation solutions for trains and trackside axle counters do not cover the entire frequency band and all axle counter types. Therefore, a testing and evaluation solution that can cover the entire frequency band and all axle counter types is urgently needed.

[0053] In view of this, this disclosure provides an electromagnetic compatibility test and evaluation method for trains and trackside axle counters. For the electromagnetic wave signals emitted by the test train, the corresponding analysis mode can be selected according to actual needs to process the electromagnetic wave signals, and the processing results are compared with the threshold of the preset analysis direction to determine whether the test train and the axle counter meet the electromagnetic compatibility requirements.

[0054] As can be seen, the technical solution disclosed herein provides analysis modes for different frequency bands and axle counter types, which can complete the electromagnetic compatibility test of axle counters and trains for each frequency band and axle counter type, and make it easier to obtain the electromagnetic compatibility test evaluation results of trains and axle counters.

[0055] The technical solutions of this disclosure will be described in detail below through specific embodiments.

[0056] refer to Figure 1 This disclosure discloses an embodiment of a method for testing and evaluating the electromagnetic compatibility of trains and trackside axle counters, comprising the following steps:

[0057] Step S101: Acquire the electromagnetic wave signal emitted by the test train and convert the electromagnetic wave signal into an analog voltage signal.

[0058] In this step, combined Figure 2 The test train 01 receives electromagnetic wave signals emitted from the X, Y, and Z directions via low-frequency test antenna 02 and high-frequency test antenna 03. Each low-frequency and high-frequency test antenna includes three independent orthogonal coils, and their installation positions conform to the PD CLC-TS 50238-3 standard. Figure 3 As shown, the test bandwidth for measuring the antenna center position is 10kHz-1.3MHz, the lateral distance from the antenna center to the center of the track plane is 96mm±3mm, and the vertical height from the antenna center to the track plane is 73mm±3mm. In this embodiment, the test bandwidth of the low-frequency test antenna is 10kHz-100kHz, and the test bandwidth of the high-frequency test antenna is 100kHz-1.3MHz.

[0059] The first data acquisition device 05 and the second data acquisition device 04 respectively acquire electromagnetic wave signals from the low / high frequency test antenna in the X, Y, and Z directions in the form of analog voltage signals. The data acquisition channels are up to 6, and the frequency of data acquisition for each channel meets 3MHz / s. Both the first and second data acquisition devices include NI acquisition cards. In addition, the sampling rate, signal range, and source impedance of the first and second data acquisition devices can be set by the host computer.

[0060] During the test, the test train accelerates from speed v1 to speed v3 at 1 / 3 of its maximum traction force, or brakes from speed v3 to speed v1. Speeds v1 and v3 can be set according to actual conditions, for example, v1 = 10 km / h, v3 = 100 km / h, without specific limitations here.

[0061] Step S102: Based on a predetermined analysis mode, the analog voltage signal is processed in a predetermined band to obtain a voltage value, and the voltage value is converted into a magnetic field value.

[0062] In this step, the analysis modes include: a spectrum analysis mode based on the Control-Command Signaling Technical Specification of Interoperability (CCSTSI) and a spectrum analysis mode based on a specific axle counter type. The CCSSTSI-based spectrum analysis mode sets parameters for out-band and / or in-band frequencies, including the corresponding frequency range, X-direction signal transmission, Y-direction signal transmission, Z-direction signal transmission, filter order, 3dB bandwidth, Hanning window length, and overlap rate. The evaluation method used is either Fast Fourier Transform (FFT) or Back Propagation (BP) neural network algorithm.

[0063] The spectrum analysis mode based on a specific shaft counter type needs to determine the filter type, filter center frequency range, filter bandwidth range, filter order, magnetic field threshold in the X / Y / Z directions, integration time, and overlap rate according to the given shaft counter type in order to perform filtering analysis on the input data.

[0064] Step S103: Based on the magnetic field value and the predetermined magnetic field thresholds in several analysis directions, obtain the electromagnetic compatibility test evaluation results of the test train and the axle counter.

[0065] In this step, the analysis directions include the X, Y, and Z directions. The magnetic field values ​​obtained after voltage value conversion have corresponding components in each analysis direction. By combining the magnetic field threshold values ​​in the corresponding analysis directions, it can be determined whether the train and the axle counter meet electromagnetic compatibility requirements.

[0066] As can be seen, the method of this disclosure determines the electromagnetic compatibility between the train and the axle counter based on different analysis modes, which can cover the entire frequency band and all axle counter types. While ensuring the accuracy of the test, it improves the testing efficiency of electromagnetic compatibility and greatly reduces the workload of the testers.

[0067] In some embodiments, when the analysis mode is a spectrum analysis mode based on a specific axle counter type, step S102 specifically includes:

[0068] The analog voltage signal is digitally filtered in the corresponding frequency band of the selected axle counter to obtain the voltage value; the voltage value after compensating the antenna coefficient is converted into the magnetic field value.

[0069] Accordingly, step S103 specifically includes:

[0070] In response to determining that the components of the magnetic field value in each of the analysis directions are all less than the corresponding preset magnetic field threshold, the test train and the axle counter are electromagnetically compatible; otherwise, the test train and the axle counter are not electromagnetically compatible.

[0071] In this embodiment, the operating frequency band of a specific type of axle counter can be digitally filtered, and the electromagnetic compatibility test results between the axle counter and the test train can be obtained based on the filtering results. This enables the technical solution of this embodiment to test and evaluate the electromagnetic compatibility between axle counters of all types and the test train.

[0072] In some embodiments, when the analysis mode is a CCS TSI-based spectrum analysis mode, step S102 specifically includes:

[0073] The voltage value is obtained by performing a short-time Fourier transform on the Out-band and In-band frequencies corresponding to the analog voltage signal; the voltage value after compensating the antenna coefficients is then converted into the magnetic field value.

[0074] Accordingly, step S103 specifically includes:

[0075] In response to the determination that the components of the magnetic field value in each of the analysis directions are all less than the corresponding preset magnetic field threshold, the test train and the axle counter meet electromagnetic compatibility.

[0076] In response to determining that the component of the magnetic field value in the Out-band frequency band of any of the analysis directions is greater than the corresponding preset magnetic field threshold, the test train and the axle counter do not meet electromagnetic compatibility requirements.

[0077] In response to determining that the component of the magnetic field value in the In-band frequency band of any of the analysis directions is greater than the corresponding preset magnetic field value, the component of the voltage value in the In-band frequency band of the corresponding analysis direction is digitally filtered; the filtering result is integrated with a preset overlap ratio and the maximum value is taken to obtain the corrected voltage value of each frequency point in the In-band frequency band; the corrected voltage value after compensating the antenna coefficient is converted into a corrected magnetic field value.

[0078] Specifically, for example, if the magnetic field value exceeds the limit in the In-band 1 (27kHz-52kHz) frequency band in the X direction, the corresponding voltage value is filtered using a 4th-order Butterworth bandpass filter with a center frequency of 27kHz and a bandwidth of 300Hz. The input time-domain data is then processed by the Butterworth bandpass filter and integrated with 75% overlap, and the maximum value is taken to obtain the corrected voltage value at the 27kHz frequency. Through continuous iteration, the corrected voltage values ​​at each frequency point from 27kHz to 52kHz are obtained.

[0079] In response to the determination that the corrected magnetic field value at each frequency point in the In-band is less than a preset magnetic field threshold, the test train and the axle counter are electromagnetically compatible; otherwise, the test train and the axle counter are not electromagnetically compatible.

[0080] In this embodiment, if the magnetic field values ​​in the X, Y, and Z directions are all less than the preset magnetic field threshold, it can be directly determined that the test train and the axle counter meet the electromagnetic compatibility requirements. If any one of the magnetic field values ​​in the X, Y, and Z directions exceeds the limit, a second determination is made to obtain the electromagnetic compatibility assessment result. This ensures the accuracy of the test assessment result and avoids obtaining incorrect test assessment results.

[0081] In some embodiments, reference Figure 4 After step S103, the following steps are included:

[0082] Step S201: In response to determining that the test train and the axle counter do not meet electromagnetic compatibility, the maximum out-of-range frequency point is extracted in the time domain to obtain the time domain spectrum of the maximum out-of-range frequency point.

[0083] In this step, the maximum out-of-range frequency point refers to the frequency point where the converted magnetic field value / corrected magnetic field value exceeds the preset magnetic field threshold the most.

[0084] Step S202: Based on the speed information of the test train, the time domain spectrum is converted into the magnetic field values ​​generated by each position of the test train to determine the abnormal magnetic field values.

[0085] Step S203: Determine the target location where the test train causes interference based on the abnormal magnetic field value.

[0086] In this embodiment, under any analysis mode, as long as the determination result is that the test train and the axle counter do not meet electromagnetic compatibility, the location of the interference caused by the test train can be determined so as to eliminate the fault and make the test train and the axle counter meet electromagnetic compatibility.

[0087] It should be noted that the method of this disclosure embodiment can be executed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method of this disclosure embodiment, and the multiple devices will interact with each other to complete the method described.

[0088] It should be noted that the above description describes some embodiments of this disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0089] Based on the same inventive concept, corresponding to any of the above embodiments, this disclosure also provides an electromagnetic compatibility testing and evaluation device for trains and trackside axle counters.

[0090] refer to Figure 2 and Figure 5 The electromagnetic compatibility testing and evaluation device 06 for trains and trackside axle counters includes:

[0091] Data acquisition module 501: configured to acquire electromagnetic wave signals emitted by the test train and convert the electromagnetic wave signals into analog voltage signals;

[0092] Data processing module 502: is configured to perform signal processing on the analog voltage signal in a predetermined band based on a predetermined analysis mode to obtain a voltage value, and convert the voltage value into a magnetic field value;

[0093] Result determination module 503: is configured to obtain the electromagnetic compatibility test evaluation results of the test train and the axle counter based on the magnetic field value and the preset magnetic field thresholds in several predetermined analysis directions.

[0094] As an optional embodiment, the data processing module is specifically configured to, when the analysis mode is a spectrum analysis mode based on a specific axle counter type, digitally filter the analog voltage signal in the corresponding frequency band of the selected axle counter to obtain the voltage value; and convert the voltage value after compensating the antenna coefficient into the magnetic field value.

[0095] As an optional embodiment, the data processing module is specifically configured to perform short-time Fourier transform on the Out-band and In-band frequencies corresponding to the analog voltage signal to obtain the voltage value when the analysis mode is a CCSTSI-based spectrum analysis mode; and convert the voltage value after compensating the antenna coefficients into the magnetic field value.

[0096] As an optional embodiment, the result determination module is specifically configured such that when the analysis mode is a spectrum analysis mode based on a specific axle counter type, in response to determining that the components of the magnetic field value in each of the analysis directions are all less than the corresponding preset magnetic field threshold, the test train and the axle counter are electromagnetically compatible; otherwise, the test train and the axle counter are not electromagnetically compatible.

[0097] As an optional embodiment, the result determination module is specifically configured such that when the analysis mode is a CCSTSI-based spectrum analysis mode, in response to determining that the components of the magnetic field value in each of the analysis directions are all less than the corresponding preset magnetic field threshold, the test train and the axle counter meet electromagnetic compatibility.

[0098] As an optional embodiment, the result determination module is specifically configured to determine that if the component of the magnetic field value in the Out-band frequency band of any of the analysis directions is greater than the corresponding preset magnetic field threshold, the test train and the axle counter do not meet electromagnetic compatibility requirements.

[0099] As an optional embodiment, the result determination module is specifically configured to, in response to determining that the component of the magnetic field value in the In-band frequency band of any of the analysis directions is greater than the corresponding preset magnetic field value, digitally filter the component of the voltage value in the In-band frequency band of the corresponding analysis direction; perform an integral operation on the filtering result with a preset overlap ratio and take the maximum value to obtain the corrected voltage value of each frequency point in the In-band frequency band; convert the corrected voltage value after compensating the antenna coefficient into a corrected magnetic field value; in response to determining that the corrected magnetic field value of each frequency point in the In-band frequency band is less than a preset magnetic field threshold, the test train and the axle counter meet electromagnetic compatibility; otherwise, the test train and the axle counter do not meet electromagnetic compatibility.

[0100] As an optional embodiment, the device further includes: an interference localization module configured to, in response to determining that the test train and the axle counter do not meet electromagnetic compatibility, extract the maximum out-of-range frequency point in the time domain to obtain the time domain spectrum of the maximum out-of-range frequency point; based on the speed information of the test train, convert the time domain spectrum into magnetic field values ​​generated by each position of the test train to determine abnormal magnetic field values; and determine the target location where the test train generates interference based on the abnormal magnetic field values.

[0101] For ease of description, the above apparatus is described in terms of its functions, divided into various modules. Of course, in implementing this disclosure, the functions of each module can be implemented in one or more software and / or hardware.

[0102] The apparatus described above is used to implement the electromagnetic compatibility testing and evaluation method for trains and trackside axle counters in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0103] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this disclosure also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the electromagnetic compatibility test and evaluation method for train and trackside axle counters described in any of the above embodiments.

[0104] Figure 6 This embodiment illustrates a more specific hardware structure of an electronic device, which may include a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0105] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0106] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0107] The input / output interface 1030 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touchscreens, microphones, various sensors, etc., while output devices may include displays, speakers, vibrators, indicator lights, etc.

[0108] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0109] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0110] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0111] The electronic equipment described above is used to implement the electromagnetic compatibility testing and evaluation method for the corresponding train and trackside axle counter in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0112] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this disclosure also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the electromagnetic compatibility test and evaluation method for trains and trackside axle counters as described in any of the above embodiments.

[0113] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0114] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the electromagnetic compatibility test and evaluation method for trains and trackside axle counters as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0115] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this disclosure, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this disclosure as described above, which are not provided in detail for the sake of brevity.

[0116] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this disclosure, the provided drawings may or may not show well-known power / ground connections to integrated circuit (IC) chips and other components. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this disclosure, and this also takes into account the fact that the details of implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this disclosure will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuitry) have been set forth to describe exemplary embodiments of this disclosure, it will be apparent to those skilled in the art that the embodiments of this disclosure may be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0117] Although this disclosure has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0118] This disclosure is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A method for testing and evaluating the electromagnetic compatibility of trains and trackside axle counters, comprising: Acquire the electromagnetic wave signal emitted by the test train and convert the electromagnetic wave signal into an analog voltage signal; Based on a predetermined analysis mode, the analog voltage signal is processed in a predetermined band to obtain a voltage value, and the voltage value is converted into a magnetic field value. The electromagnetic compatibility test evaluation results of the test train and the axle counter are obtained based on the magnetic field value and the predetermined magnetic field thresholds in several analysis directions. The analysis mode is a spectrum analysis mode based on CCS TSI, and the evaluation method used is fast Fourier transform or BP neural network algorithm. The method further includes: In response to the determination that the test train and the axle counter do not meet electromagnetic compatibility, the maximum exceeding frequency point is extracted in the time domain to obtain the time domain spectrum of the maximum exceeding frequency point; Based on the speed information of the test train, the time-domain spectrum is converted into the magnetic field values ​​generated by each position of the test train to determine the abnormal magnetic field values. Based on the abnormal magnetic field value, the target location where the test train caused the interference was determined.

2. The method according to claim 1, wherein, The analysis mode is a spectrum analysis mode based on a specific axle counter type; The process of processing the analog voltage signal in a predetermined band based on a predetermined analysis mode to obtain a voltage value, and then converting the voltage value into a magnetic field value, specifically includes: The analog voltage signal is digitally filtered in the corresponding frequency band of the selected shaft counter to obtain the voltage value; The voltage value after compensating the antenna coefficient is converted into the magnetic field value; The electromagnetic compatibility test evaluation results of the test train and the axle counter are obtained based on the magnetic field value and preset magnetic field thresholds in several predetermined analysis directions, specifically including: In response to determining that the components of the magnetic field value in each of the analysis directions are all less than the corresponding preset magnetic field threshold, the test train and the axle counter are electromagnetically compatible; otherwise, the test train and the axle counter are not electromagnetically compatible.

3. The method according to claim 1, wherein, The analysis mode is a spectrum analysis mode based on CCS TSI; The process of processing the analog voltage signal in a predetermined band based on a predetermined analysis mode to obtain a voltage value, and then converting the voltage value into a magnetic field value, specifically includes: The voltage value is obtained by performing a short-time Fourier transform on the Out-band and In-band frequencies corresponding to the analog voltage signal. The voltage value after compensating the antenna coefficient is converted into the magnetic field value; The electromagnetic compatibility test evaluation results of the test train and the axle counter are obtained based on the magnetic field value and preset magnetic field thresholds in several predetermined analysis directions, specifically including: In response to the determination that the components of the magnetic field value in each of the analysis directions are all less than the corresponding preset magnetic field threshold, the test train and the axle counter meet electromagnetic compatibility.

4. The method according to claim 3, wherein, The electromagnetic compatibility test evaluation results of the test train and the axle counter are obtained based on the magnetic field value and preset magnetic field thresholds in several predetermined analysis directions, specifically including: In response to determining that the component of the magnetic field value in the Out-band frequency band of any of the analysis directions is greater than the corresponding preset magnetic field threshold, the test train and the axle counter do not meet electromagnetic compatibility requirements.

5. The method according to claim 4, wherein, The electromagnetic compatibility test evaluation results of the test train and the axle counter are obtained based on the magnetic field value and preset magnetic field thresholds in several predetermined analysis directions, specifically including: In response to determining that the component of the magnetic field value in the In-band frequency band of any of the analysis directions is greater than the corresponding preset magnetic field threshold, the component of the voltage value in the In-band frequency band of the corresponding analysis direction is digitally filtered; The filtering results are integrated with a preset overlap ratio and the maximum value is taken to obtain the corrected voltage value at each frequency point in the In-band. The corrected voltage value after compensating the antenna coefficient is converted into a corrected magnetic field value; In response to the determination that the corrected magnetic field value at each frequency point in the In-band is less than a preset magnetic field threshold, the test train and the axle counter are electromagnetically compatible; otherwise, the test train and the axle counter are not electromagnetically compatible.

6. An electromagnetic compatibility testing and evaluation device for trains and trackside axle counters, comprising: Data acquisition module: configured to acquire electromagnetic wave signals emitted by the test train and convert the electromagnetic wave signals into analog voltage signals; Data processing module: configured to perform signal processing on the analog voltage signal in a predetermined band based on a predetermined analysis mode to obtain a voltage value, and convert the voltage value into a magnetic field value; The result determination module is configured to obtain the electromagnetic compatibility test evaluation results of the test train and the axle counter based on the magnetic field value and the preset magnetic field thresholds in several predetermined analysis directions. The analysis mode is a spectrum analysis mode based on CCS TSI, and the evaluation method used is fast Fourier transform or BP neural network algorithm. The device further includes: Interference localization module: configured to extract the time domain of the maximum out-of-range frequency point in response to determining that the test train and the axle counter do not meet electromagnetic compatibility, so as to obtain the time domain spectrum of the maximum out-of-range frequency point; Based on the speed information of the test train, the time-domain spectrum is converted into the magnetic field values ​​generated by each position of the test train to determine the abnormal magnetic field values. Based on the abnormal magnetic field value, the target location where the test train caused the interference was determined.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method as claimed in any one of claims 1 to 5.

8. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1 to 5.

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