Track circuit signal processing method and device, equipment and storage medium

Abstract

The invention discloses a track circuit signal processing method and device, equipment and a storage medium, and the method comprises the steps: obtaining a collection signal, and judging whether the collection signal contains an interference signal or not through a two-way bridge structure comprising a parallel resonance frequency selection structure and a series resonance frequency selection structure; by means of the two-way bridge structure, tiny interference signals meeting the preset precision condition can be collected and analyzed, after it is judged that the interference signals exist in the track circuit, the interference signals are collected and output as output signals, and the anti-interference performance of a track circuit system is improved.

Description

Technical Field

[0001] The present application belongs to the field of signal detection technology, and in particular, relates to a method, device, equipment and storage medium for processing track circuit signals. Background Art

[0002] The ZPW-2000A track circuit system has become the main railway signal product with its high safety and reliability. One of its characteristics is its strong anti-interference ability to external noise. At present, the increasingly complex on-site use environment of the ZPW-2000A track circuit system and the needs of the development of the track circuit products themselves have put forward higher requirements for the anti-interference performance of the track circuit system. Summary of the invention

[0003] In view of this, the present application provides a method, device, equipment and storage medium for processing track circuit signals, aiming to provide a track circuit system with stronger anti-interference performance.

[0004] To solve the above problems, this application provides the following solutions:

[0005] A method for processing a track circuit signal, comprising:

[0006] Obtaining acquisition signals;

[0007] The dual-bridge structure is used to determine whether the collected signal contains an interference signal, wherein the interference signal is a signal that is inconsistent with the frequency of the track circuit signal. The dual-bridge structure includes a parallel resonant frequency selection structure and a series resonant frequency selection structure, and can collect and analyze small interference signals that meet preset accuracy conditions;

[0008] When it is determined that the track circuit contains the interference signal, the interference signal is collected and output as an output signal.

[0009] Optionally, before outputting the interference signal as the output signal, the method further includes:

[0010] The interference signal is processed in a preset manner.

[0011] Optionally, the performing preset processing on the interference signal includes:

[0012] Inputting the interference signal of the first bridge and the interference signal of the second bridge into the operational amplifier for amplification processing respectively, to obtain a first amplification processing result and a second method processing result;

[0013] Inputting the first amplification processing result and the second amplification processing result into a frequency comparator to determine whether the frequencies of the first amplification processing result and the second amplification processing result are consistent;

[0014] If the frequencies match, the interference signal is valid.

[0015] Optionally, the performing preset processing on the interference signal includes:

[0016] Analyze the interference source or interference type of the interference signal.

[0017] Optionally, the dual bridge structure includes a first bridge and a second bridge that can verify each other to determine whether the structure of the track circuit is complete and whether the track circuit signal is valid, the first bridge is a parallel resonant structure, and the second bridge is a series resonant structure.

[0018] Optionally, also include:

[0019] When the collected signal does not contain a signal that is inconsistent with the track circuit signal frequency, the track circuit has no output signal or the output signal is small.

[0020] Optionally, also include:

[0021] Input signals of different frequencies are input to verify the sensitivity of track circuits of different frequencies in collecting and analyzing interference signals.

[0022] A track circuit signal processing device, comprising:

[0023] Acquisition unit, judgment unit and collection unit;

[0024] The acquisition unit is used to acquire the acquisition signal;

[0025] The input unit is used to determine whether the collected signal contains an interference signal through a dual-bridge structure, wherein the interference signal is a signal that is inconsistent with the frequency of the track circuit signal. The dual-bridge structure includes a parallel resonant frequency selection structure and a series resonant frequency selection structure, and can collect and analyze small interference signals that meet preset accuracy conditions;

[0026] The collection unit is used to collect the interference signal and output it as an output signal when it is determined that the track circuit contains the interference signal.

[0027] A track circuit signal processing device, comprising a memory and a processor;

[0028] The memory is used to store instructions;

[0029] The processor is used to execute the instructions stored in the memory to implement the track circuit signal processing method described in any one of the above items.

[0030] A storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the method for processing a track circuit signal as described in any one of the above items can be implemented.

[0031] It can be seen from the above scheme that the processing method, device, equipment and storage medium of the track circuit signal disclosed in the present application, after obtaining the collected signal, judge whether the collected signal contains interference signal through a dual-bridge structure including a parallel resonant frequency selection structure and a series resonant frequency selection structure. The dual-bridge structure enables the present application to collect and analyze tiny interference signals that meet the preset accuracy conditions. After judging that there is an interference signal in the track circuit, the collected interference signal is output as an output signal, thereby increasing the anti-interference performance of the track circuit system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0033] Figure 1 It is a flow chart of a method for processing track circuit signals provided by the present application;

[0034] Figure 2 It is another flowchart diagram of the method for processing track circuit signals provided by the present application;

[0035] Figure 3 An example diagram of the circuit structure of the method for processing track circuit signals provided in the present application;

[0036] Figure 4 It is a circuit structure example diagram of a simulation of a track circuit signal processing method provided in the present application;

[0037] Figure 5 It is a structural diagram of the track circuit signal processing device provided by the present application;

[0038] Figure 6 This is a hardware structure block diagram of the track circuit signal processing device provided in this application. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0041] It should be noted that the concepts such as "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0042] It should be noted that the modifications of "one" and "plurality" mentioned in the present application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0043] The ZPW-2000A track circuit system is one of the main railway signal systems in my country. Its carrier frequencies mainly include eight types: 1700-1, 1700-2; 2000-1, 2000-2; 2300-1, 2300-2; 2600-1, 2600-2. Through FSK modulation, with a frequency deviation of 11Hz, the low-frequency information is integrated into the carrier frequency and transmitted to the locomotive, and the locomotive is controlled through signal processing. The low frequency is mainly from 10.3Hz to 29Hz, and is arranged in an arithmetic progression with a tolerance of 1.1Hz, totaling 18 types.

[0044] The ZPW-2000A track circuit system has strong anti-interference ability to external noise. However, due to the increasingly complex on-site use environment of the system and higher requirements for the development of track circuit products, higher requirements are placed on the anti-interference performance of the track circuit system. In particular, the collection and analysis of tiny interference signals is an important basis for improving the functions of the track circuit system.

[0045] In order to meet the above requirements, the present application proposes a method, device, equipment and storage medium for processing track circuit signals.

[0046] See also Figure 1 , a flow chart of a method for processing a track circuit signal provided in the present application, as shown in the figure, the processing flow of the method for processing a track circuit signal is as follows:

[0047] Step 101: Acquire a collection signal.

[0048] The track circuit system includes a track circuit, and the track circuit is divided into an input end and an output end. Optionally, the input end obtains a collection signal. When the collection signal does not contain an interference signal, the frequency of the collection signal is consistent with the frequency of the track circuit signal; when the collection signal contains an interference signal, the frequency of the interference signal in the collection signal is inconsistent with the frequency of the track circuit signal. The purpose of this application is to collect and analyze tiny interference signals in the track circuit, and at the same time, to filter the track circuit system.

[0049] Step 102: determine whether the collected signal contains an interference signal through a dual-bridge structure, where the interference signal is a signal that is inconsistent with the frequency of the track circuit signal. The dual-bridge structure includes a parallel resonant frequency selection structure and a series resonant frequency selection structure, which can collect and analyze tiny interference signals that meet preset accuracy conditions.

[0050] It should be noted that the bridge circuit has the advantage of high sensitivity in signal detection and is often used in the field of precision detection. Therefore, the bridge circuit is adopted in this application, and its high sensitivity advantage can be used to detect and analyze tiny interference signals. The track circuit in this application combines the bridge circuit with the frequency selection function circuit, which can collect and analyze tiny interference signals, has strong operability and significant effects. The dual-bridge structure is mainly a structural design through resonant frequency selection, including a parallel resonant frequency selection structure and a series resonant frequency selection structure. This structure is very sensitive to signals that are inconsistent with the frequency of the track circuit, and can sense tiny interference signals through resonant frequency selection.

[0051] Optionally, after the collected signal enters the input end, it is divided into two paths, one path enters the first bridge, and the other path enters the second bridge.

[0052] The dual-bridge structure adopted in this application, the first bridge can be a parallel resonant structure, and the second bridge can be a series resonant structure. Both the first bridge and the second bridge include components consistent with the track circuit signal frequency, such as resistors, capacitors, inductors, etc. The first bridge in the track circuit of the dual-bridge structure contains components such as resistors, capacitors, and inductors. The conjugate impedance design is adopted to enable the structure to form a pure resistor with the same resistance value as the resistor in the first bridge. The resistance values ​​of several resistors in the second bridge are the same, and there are components whose sum of impedance values ​​is zero. The reason for adopting the dual-bridge structure is that the two bridges can be verified with each other, and the integrity of the track circuit structure and the validity of the signal can be judged.

[0053] Exemplarily, when the track circuit works normally and there is no interference, the frequency of the track circuit signal is 1700Hz. At this time, the dual-bridge structure circuit in the track circuit designed based on 1700Hz does not output a signal; if in addition to the 1700Hz track circuit signal, there are other interference signals, for example, there is an interference signal with a frequency of 10Hz, then the dual-bridge structure will actively collect and analyze the track circuit signal containing the interference signal, and will output 10Hz signal characteristics in the first bridge and the second bridge respectively, which proves that the dual-bridge structure is working normally and there is an interference signal with a frequency of 10Hz in the track circuit; when a 10Hz interference signal appears in the first bridge or the second bridge, and the other bridge does not have a 10Hz interference signal, it proves that the dual-bridge structure circuit is faulty.

[0054] Step 103: When it is determined that the track circuit contains the interference signal, the interference signal is collected and output as an output signal.

[0055] When there is an interference signal in the collected signal that is inconsistent with the track circuit frequency, the collected interference signal is output as an output signal.

[0056] To sum up, the track circuit signal processing method disclosed in the present application determines whether the collected signal contains an interference signal through a dual-bridge structure including a parallel resonant frequency selection structure and a series resonant frequency selection structure after obtaining the collected signal. The dual-bridge structure enables the present application to collect and analyze tiny interference signals that meet preset accuracy conditions. After determining that there is an interference signal in the track circuit, the collected interference signal is output as an output signal, thereby increasing the anti-interference performance of the track circuit system.

[0057] Optionally, in one embodiment, the method for processing track circuit signals provided in the present application further includes a step of performing preset processing on the interference signal before outputting the interference signal as an output signal.

[0058] The preset processing includes analyzing the interference signal to determine the interference source or interference type of the interference signal; performing frequency comparison after amplifying the interference signal to determine whether the interference signal is effective after amplifying the tiny interference signal.

[0059] Specifically, when the interference signal passes through the dual bridge structure, the signal is small, and the interference signal output from the first bridge and the interference signal output from the second bridge are respectively input into the operational amplifier for processing, so as to obtain the first amplification processing result corresponding to the first bridge and the second amplification processing result corresponding to the second bridge, and the first amplification processing result and the second amplification processing result are input into the frequency comparator for mutual verification, and when the frequencies of the two are consistent, it proves that the collected interference signal is valid.

[0060] Optional, see Figure 2, another flow chart of the method for processing track circuit signals provided by the present application, the present application further includes the following steps:

[0061] Step 201: Input signals of different frequencies to verify the sensitivity of track circuits of different frequencies to the collection and analysis of interference signals.

[0062] Optionally, this is a verification process for testing the sensitivity of the track circuit of the present application to a small interference signal. A signal with a different frequency from the track circuit is input, and the magnitude of the output current is compared. When there is a small interference signal in the input signal, the output current will be large. When there is no interference signal in the input signal, no current is output or the output current is very small.

[0063] For example, see Figure 3 , the circuit structure example diagram of the track circuit signal processing method provided by the present application is shown in the figure. The frequency of the track circuit in the figure is 1700-1 or 1700-2. First, the track circuit performs voltage acquisition, which is a dual-bridge circuit including an input end and an output end. After the acquisition signal enters the input end, it is divided into two paths, one path enters the 1-path bridge structure, and the other path enters the 2-path bridge structure.

[0064] For the 1-way bridge structure, it is a parallel resonant structure, R11 = R13 = R12; the impedance value of R14 and L11 is Z11 = A + Bi; the impedance value of R15 and C11 is Z12 = A-Bi, that is, Z12 and Z11 are designed as conjugate impedances, and the parallel impedance of the two is a pure resistance RA, let RA = R11 = R13 = R12. The ratio of R17 to R16 in the figure is a multiple of the operational amplifier.

[0065] For the 2-way bridge structure, it is a series resonant structure, R21=R22=R23=R24; the sum of the impedance values ​​of L21 and C21 is zero; the ratio of R27 and R26 is a multiple of the operational amplifier.

[0066] It should be noted that the impedance values ​​of L11, C11, L21 and C21 in the figure are related to the frequency, which is the operating frequency of the track circuit, that is, 1700-1 or 1700-2.

[0067] When the input signal is the operating frequency of the track circuit, the resistances on the four arms of the bridge circuit reach a balance, the output voltage is zero, and there is no output signal from bridges 1 and 2. When the input signal is not the operating frequency of the track circuit, output signals appear in the bridge structures 1 and 2, thus achieving the purpose of frequency selection analysis.

[0068] After passing through the bridge circuit, the signal is small and enters the operational amplifier for amplification.

[0069] Afterwards, the dual output signals U01 and U02 are checked against each other by the frequency comparator. When the signal frequencies are consistent, it proves that the signals are valid.

[0070] For example, see Figure 4 The circuit structure example diagram of the simulation of the track circuit signal processing method provided in the present application shows that when the input signal is 1700Hz, the output current value on line AB is 1.1mA; when the input signal is 10Hz, the output current value on line AB is 46.7mA, which proves that the frequency selection function of the present application is better.

[0071] Specifically, when the input signal is 1700Hz, the series circuit composed of R15 and C11 and the series circuit composed of R14 and L11 form parallel resonance, and the final impedance value is 210Ω, that is, the four impedance values ​​in the bridge structure are all 210Ω. In this case, combined with the unique properties of the bridge circuit itself, the voltage value between points AB is 0; when the input signal is not 1700Hz, but 10Hz, the series circuit composed of R15 and C11 and the series circuit composed of R14 and L11 do not form parallel resonance, and the final impedance value is not 210Ω. In this way, the four impedance values ​​that make up the bridge structure are not equal. Based on the characteristics of the bridge circuit, the voltage value between points AB is not 0. At this time, if AB is connected, an alternating current will appear, and the frequency of the current is 10Hz.

[0072] For the above-mentioned track circuit processing method, the present application also provides a track circuit signal processing device, the composition of which is as follows: Figure 5 shown.

[0073] The acquisition unit 10, the judgment unit 20 and the collection unit 30, wherein:

[0074] The acquisition unit 10 is used to acquire the acquisition signal;

[0075] The judging unit 20 is used to judge whether the collected signal contains an interference signal through a dual-bridge structure, wherein the interference signal is a signal with a frequency inconsistent with the track circuit signal. The dual-bridge structure includes a parallel resonant frequency selection structure and a series resonant frequency selection structure, and can collect and analyze small interference signals that meet preset accuracy conditions;

[0076] The collection unit 30 is used to

[0077] When it is determined that the track circuit contains the interference signal, the interference signal is collected and output as an output signal.

[0078] In one embodiment, the above device further includes a preset processing unit, which is specifically configured to:

[0079] Before outputting the interference signal as an output signal, a preset process is performed on the interference signal.

[0080] In one embodiment, the preset processing unit is specifically used for:

[0081] Inputting the interference signal of the first bridge and the interference signal of the second bridge into the operational amplifier for amplification processing respectively, to obtain a first amplification processing result and a second method processing result;

[0082] Inputting the first amplification processing result and the second amplification processing result into a frequency comparator to determine whether the frequencies of the first amplification processing result and the second amplification processing result are consistent;

[0083] If the frequencies match, the interference signal is valid.

[0084] In one embodiment, the preset processing unit is specifically used for:

[0085] Analyze the interference source or interference type of the interference signal.

[0086] In one embodiment, the dual bridge structure in the judgment unit 20 includes a first bridge and a second bridge that can verify each other to determine whether the structure of the track circuit is complete and whether the track circuit signal is valid. The first bridge is a parallel resonant structure and the second bridge is a series resonant structure.

[0087] In one embodiment, the above device further includes an output unit, which is specifically used to:

[0088] When the collected signal does not contain a signal that is inconsistent with the track circuit signal frequency, the track circuit has no output signal or the output signal is small.

[0089] In one embodiment, the above device further includes a verification unit, which is specifically used to:

[0090] Input signals of different frequencies are input to verify the sensitivity of track circuits of different frequencies in collecting and analyzing interference signals.

[0091] Optionally, the present application also provides a track circuit signal processing device, such as Figure 6 The hardware structure block diagram of the track circuit signal processing device provided by the present application shown mainly includes a processor 1 and a memory 3, and at least one processor 1, at least one communication interface 2, at least one memory 3 and at least one communication bus 4.

[0092] The memory 3 is used to store instructions;

[0093] The processor 1 is used to execute the instructions stored in the memory to implement various processing procedures of the track circuit signal processing method.

[0094] In addition, an embodiment of the present application further provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the various processing flows of the method for processing track circuit signals can be implemented.

[0095] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0096] For the convenience of description, the above system or device is described by dividing it into various modules or units according to its functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0097] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly contributed to the prior art in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0098] Finally, it should be noted that, in this article, relational terms such as first, second, third and fourth are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0099] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for processing track circuit signals, characterized in that: include: Obtaining acquisition signals; The dual-bridge structure is used to determine whether the collected signal contains an interference signal, wherein the interference signal is a signal that is inconsistent with the frequency of the track circuit signal. The dual-bridge structure includes a parallel resonant frequency selection structure and a series resonant frequency selection structure, and can collect and analyze small interference signals that meet preset accuracy conditions; When it is determined that the track circuit contains the interference signal, the interference signal is collected and output as an output signal.

2. The method according to claim 1, characterized in that Before outputting the interference signal as an output signal, the method further comprises: The interference signal is processed in a preset manner.

3. The method according to claim 2, characterized in that The performing preset processing on the interference signal includes: Inputting the interference signal of the first bridge and the interference signal of the second bridge into the operational amplifier for amplification processing respectively, to obtain a first amplification processing result and a second method processing result; Inputting the first amplification processing result and the second amplification processing result into a frequency comparator to determine whether the frequencies of the first amplification processing result and the second amplification processing result are consistent; If the frequencies match, the interference signal is valid.

4. The method according to claim 2, characterized in that: The performing preset processing on the interference signal includes: Analyze the interference source or interference type of the interference signal.

5. The method according to claim 1, characterized in that The dual bridge structure includes a first bridge and a second bridge that can check each other to determine whether the structure of the track circuit is complete and whether the track circuit signal is valid. The first bridge is a parallel resonant structure, and the second bridge is a series resonant structure.

6. The method according to claim 1, characterized in that Also includes: When the collected signal does not contain a signal that is inconsistent with the track circuit signal frequency, the track circuit has no output signal or the output signal is small.

7. The method according to claim 1, characterized in that Also includes: Input signals of different frequencies are input to verify the sensitivity of track circuits of different frequencies in collecting and analyzing interference signals.

8. A track circuit signal processing device, characterized in that: include: Acquisition unit, judgment unit and collection unit; The acquisition unit is used to acquire the acquisition signal; The input unit is used to determine whether the collected signal contains an interference signal through a dual-bridge structure, wherein the interference signal is a signal that is inconsistent with the frequency of the track circuit signal. The dual-bridge structure includes a parallel resonant frequency selection structure and a series resonant frequency selection structure, and can collect and analyze small interference signals that meet preset accuracy conditions; The collection unit is used to collect the interference signal and output it as an output signal when it is determined that the track circuit contains the interference signal.

9. A track circuit signal processing device, characterized in that: including memory and processor; The memory is used to store instructions; The processor is used to execute instructions stored in the memory to implement the track circuit signal processing method described in any one of claims 1-7.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it can implement the method for processing track circuit signals as described in any one of claims 1 to 7.

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