A 25Hz phase-sensitive track circuit fault diagnosis method, system and medium in a station

Abstract

The application belongs to the field of rail transit, and discloses a station 25Hz phase-sensitive track circuit fault diagnosis method, system and medium, which comprises the following steps: collecting electrical parameters of outdoor track circuit equipment and track voltage of indoor track relays; when the change amplitude of the track voltage relative to the reference voltage of the same section in the idle state exceeds the preset threshold, judging the track section to be in the occupied state or the idle state according to the working state of the track relay; when the track section is in the occupied state, outputting a fault code and triggering an alarm signal; when the track section is in the idle state, outputting a warning code and triggering a warning signal; and positioning the fault position or the hidden danger position according to the fault code or the warning code in combination with the electrical parameters. The method realizes real-time monitoring and early warning and alarm integration and cooperation, and reduces the false alarm rate.

Description

Technical Field

[0001] This application belongs to the field of rail transit, and specifically relates to a method, system and medium for diagnosing faults in 25Hz phase-sensitive track circuits within stations. Background Technology

[0002] The majority of track circuits in conventional railway stations use 25Hz phase-sensitive track circuits. This technology has been in use for over 40 years and can meet the needs of electrified railways and locomotive signals.

[0003] like Figure 1 As shown, the existing 25Hz phase-sensitive track circuit system consists of two parts: indoor equipment and outdoor equipment. The indoor equipment includes a power supply (25Hz, 220V), lightning protection (QFB), a protective box (HF), and a track relay. The outdoor equipment includes a 25Hz track transformer, a choke transformer, and a circuit breaker, etc.

[0004] The existing 25Hz phase-sensitive track circuit has the following problems: The equipment was developed relatively early, and the materials and components were scattered, which is not compatible with the development trend of digitalization and informatization of railway signaling. The equipment requires maintenance personnel to conduct periodic tests outdoors, which is labor-intensive and inefficient. There is no timely warning before equipment failure, and no accurate alarm and location of the failure after it occurs.

[0005] Therefore, there is an urgent need for a solution that can provide timely early warning and accurate alarm for 25Hz phase-sensitive track circuits. Summary of the Invention

[0006] To address the aforementioned issues, this application provides a method, system, and medium for diagnosing faults in 25Hz phase-sensitive track circuits within a station, enabling accurate fault alarms and early warnings of potential hazards, reducing false alarm rates, and improving maintenance efficiency.

[0007] The technical solution is as follows: A method for diagnosing faults in a 25Hz phase-sensitive track circuit within a station, comprising: Collect electrical parameters of outdoor track circuit equipment and track voltage of indoor track relays; When the change in the track voltage relative to the reference voltage of the same section in an idle state exceeds a preset threshold, the track section is determined to be occupied or idle based on the working state of the track relay. When the track section is occupied, a fault code is output and an alarm signal is triggered; When the track section is idle, an early warning code is output and an early warning signal is triggered; Based on the fault code or warning code, and in conjunction with the electrical parameters, locate the fault location or potential hazard location.

[0008] Furthermore, the track circuit equipment includes a track transformer and a choke transformer, and the collected electrical parameters include at least the voltage and current at the power supply end and the voltage and current at the power receiving end of the track transformer, as well as the rail-side lead-in current of the choke transformer.

[0009] Furthermore, when the track relay is activated, the corresponding track section is in an idle state; when it is deactivated, the corresponding track section is in an occupied state.

[0010] Furthermore, when the track section is occupied, fault data features are extracted from a preset fault database according to the track section type, and the collected electrical parameters are matched with the fault data features. If the match is successful, the corresponding fault code is output.

[0011] Furthermore, when the track section is idle, hazard data features are extracted from a preset hazard database according to the track section type, and the collected electrical parameters are matched with the hazard data features. If the match is successful, the corresponding warning code is output.

[0012] Furthermore, the track section type is any one of one-send-one-receiver, one-send-two-receiver, or one-send-three-receiver.

[0013] Furthermore, when the alarm signal is triggered, the corresponding track section displays a red light band on the control panel; When the warning signal is triggered, the corresponding track section will maintain its original display status on the control panel.

[0014] A fault diagnosis system for 25Hz phase-sensitive track circuits within a station includes: Outdoor data acquisition equipment is used to collect electrical parameters of outdoor track circuits; Indoor data acquisition equipment is used to collect the track voltage of indoor track relays; A communication host is communicatively connected to the outdoor acquisition device, the indoor acquisition device, and the diagnostic host, respectively, and is used to transmit the acquired data to the diagnostic host; The diagnostic host is configured as follows: When the change in the track voltage relative to the reference voltage of the same section in an idle state exceeds a preset threshold, the working state of the track relay is determined, and the track section is judged to be occupied or idle based on the working state of the track relay. When the track section is occupied, a fault code is output and an alarm signal is triggered; When the track section is idle, an early warning code is output and an early warning signal is triggered; Furthermore, based on the fault code or the warning code, and in conjunction with the electrical parameters, the location of the fault or potential hazard can be determined.

[0015] Furthermore, the outdoor data acquisition device includes: The non-contact current acquisition unit is installed at the long and short wires of the traction coil on the rail side of the choke transformer, as well as at the power supply end and power receiving end of the track transformer, to acquire the rail lead wire current of the choke transformer, the power supply end current and the power receiving end current of the track transformer, respectively. The non-contact voltage acquisition unit is installed at the power supply end and the power receiving end of the track transformer to acquire the voltage at the power supply end and the voltage at the power receiving end of the track transformer, respectively.

[0016] Based on the same inventive concept, this application also provides a computer storage medium storing computer-executable instructions, which, when executed, implement the aforementioned method for diagnosing faults in a 25Hz phase-sensitive track circuit within a station.

[0017] Compared with the prior art, this application has the following advantages: (1) Real-time monitoring of the working signals of indoor and outdoor equipment of 25Hz phase-sensitive track circuit, issuing early warning through abnormal changes in track voltage of track relay before the fault occurs, and accurately alarming after the fault occurs, realizing the integrated coordination of real-time monitoring and early warning alarm; (2) By judging the section status through the working status of the track relay, the normal track occupation by the train and the abnormal equipment scenario can be effectively distinguished, avoiding false alarm of normal occupation as fault and reducing the false alarm rate; (3) By combining fault codes / warning codes with multi-dimensional electrical parameters, specific fault / abnormal areas can be located, providing clear guidance for maintenance personnel; (4) Bypass non-contact data acquisition is adopted, which does not affect the signal transmission and equipment operation of the original 25Hz phase-sensitive track circuit.

[0018] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of an existing 25Hz phase-sensitive track circuit system is shown. Figure 2 The flowchart of the fault diagnosis method for the 25Hz phase-sensitive track circuit in the station in this embodiment is shown; Figure 3 This diagram illustrates the structure of the 25Hz phase-sensitive track circuit fault diagnosis system within the station according to this embodiment. Figure 4 This diagram illustrates the data transmission of the 25Hz phase-sensitive track circuit fault diagnosis system within the station, as shown in this embodiment. Figure 5 The diagram shows the diagnostic logic of the 25Hz phase-sensitive track circuit fault diagnosis system in this embodiment. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] like Figure 2 As shown in the figure, this application provides a method for diagnosing faults in a 25Hz phase-sensitive track circuit within a station, including: S1. Collect the electrical parameters of the outdoor track circuit equipment and the track voltage of the indoor track relay; S2. When the change in the track voltage relative to the reference voltage of the same section in the idle state exceeds a preset threshold, the track section is determined to be occupied or idle based on the working state of the track relay. S31. When the track section is occupied, output a fault code and trigger an alarm signal; S32. When the track section is idle, output a warning code and trigger a warning signal; S4. Based on the fault code or the warning code, and in conjunction with the electrical parameters, locate the fault location or the potential hazard location.

[0023] This embodiment monitors indoor and outdoor equipment of the 25Hz phase-sensitive track circuit in real time. When the track voltage is abnormal, the operating status of the track relay is used to determine the section status, effectively distinguishing between normal track occupancy by trains and abnormal equipment scenarios. This avoids misreporting normal occupancy as a fault, reducing the false alarm rate. At the same time, by combining fault codes / warning codes with multi-dimensional electrical parameters, it can issue early warnings through abnormal changes in track voltage before a fault occurs, and accurately alarm after a fault occurs. It can also locate the specific fault / abnormal area, providing clear guidance for maintenance personnel and achieving integrated collaboration between real-time monitoring and early warning alarms.

[0024] The track circuit equipment includes a track transformer and a choke transformer. The electrical parameters of the track circuit equipment collected in step S1 include at least: the voltage and current of the power supply end of the track transformer, the voltage and current of the power receiving end, and the rail-side lead wire current of the choke transformer.

[0025] In practical applications, track transformers are installed at both the power-sending and power-receiving ends of the track circuit. The power-sending track transformer steps down the 25Hz AC signal transmitted from the indoor circuit before transmitting it via the rails to the power-receiving end. The power-receiving track transformer boosts the 25Hz signal received from the rails before sending it to the track relays indoors, driving the relays to operate. The operating status of the track transformers directly determines the signal transmission quality of the track circuit; their voltage and current parameters are key indicators for judging whether the track circuit is functioning correctly.

[0026] Choke transformers are installed on the rail side of the track circuit to provide a low-impedance loop for the traction current (50Hz power frequency) and a high impedance loop for the 25Hz track signal, thereby isolating the signal from the traction current, ensuring smooth traction return in electrified railway sections, and preventing the traction current from interfering with the normal operation of the track circuit.

[0027] The lead wire current of the choke transformer (rail side lead wire current) reflects the balance of the traction current and the integrity of the track circuit. It is an important basis for judging whether the rail is broken or whether the lead wire has poor contact.

[0028] In this embodiment, to avoid affecting the normal operation of the original track circuit, all electrical parameters are acquired using a non-contact acquisition method. For example, a high-impedance induction probe is used to acquire voltage, which is non-contactly attached to the terminal block of the device under test or the outer insulation layer of the cable, without needing to disconnect the original wiring. The non-contact acquisition method does not change the original circuit topology, does not introduce additional load, does not affect signal transmission, and the failure of the acquisition device itself will not cause the track circuit to fail.

[0029] The track relay is the core terminal equipment on the indoor side of the 25Hz phase-sensitive track circuit. Its function is to convert the 25Hz track signal transmitted on the outdoor rails into a switching signal to determine whether a track section is occupied by a train. Generally, the track relay is a phase-sensitive rectifier relay, which has frequency selectivity for the 25Hz signal. The relay can reliably activate only when the received signal frequency is 25Hz and meets the phase requirements, while suppressing 50Hz traction current and other interference signals to ensure the accuracy of occupancy determination.

[0030] In this embodiment, when the change in the track voltage relative to the reference voltage of the same section in the idle state exceeds a preset threshold, the track section is determined to be occupied or idle based on the working state of the track relay.

[0031] Track voltage: The voltage value across the coil of the indoor track relay.

[0032] Reference voltage for the same track section under idle conditions: The standard 25Hz voltage value measured across the track relay coil when a specific track section is idle (no trains are occupying it) and the equipment is operating normally. The reference voltage reflects the signal transmission characteristics of the track section under healthy conditions, and the reference voltage may differ between different track sections.

[0033] The methods for obtaining the reference voltage include: after the system is installed and debugged, continuously collect the track voltage when no train passes through for a period of time (such as 24 hours), and take the average value as the reference voltage; after each train passes through, collect the track voltage at this time when the section returns to an idle state, and dynamically update the reference value through a moving average algorithm; according to the design drawings or on-site test values, the reference voltage value is manually entered by the maintenance personnel.

[0034] In practical applications, when the drop in track voltage relative to the reference voltage exceeds a preset threshold (a configurable parameter, typically between 15% and 30%), subsequent diagnostic procedures are triggered.

[0035] The basic working principle of the 25Hz phase-sensitive track circuit is as follows: the power supply end sends a 25Hz signal, which is transmitted to the power receiving end through the rail, driving the track relay to pick up (indicating that it is idle); when the train wheelset enters the section, the wheelset splits (short-circuits) the signal on the rail, the signal voltage received by the power receiving end drops sharply, and the track relay drops (indicating that it is occupied).

[0036] Therefore, both normal train occupancy and track malfunctions can cause a drop in track voltage, but the former is a normal occurrence during train operation, while the latter is an anomaly requiring maintenance personnel intervention. This application distinguishes between these two situations by introducing track relay status.

[0037] When the track relay is activated, the corresponding track segment is in an idle state; when it is deactivated, the corresponding track segment is in an occupied state. Specifically: 1. Lifting state: The relay armature is attracted by electromagnetic force, the front contact is closed, and the 25Hz signal sent from the outdoor power supply end is transmitted to the power receiving end through the rail. That is, the 25Hz signal received by the track circuit is normal, indicating that there is no train occupying the track section. 2. Falling state: The relay armature is released under the action of gravity or the reaction spring, the front contact is disconnected, and the amplitude of the 25Hz signal received by the track circuit is insufficient or interrupted, indicating that a train is occupying the track section or a fault has occurred.

[0038] It should be noted that when abnormal situations such as rail breakage, cable breakage, track transformer failure, or power outage occur in the track circuit, the receiving end will also be unable to receive a valid signal, and the track relay will also drop. At this time, the section status will also indicate that it is occupied, but it is not actually occupied by trains, but a false occupancy caused by the fault.

[0039] Since the track relay may correspond to two different situations when it is in the dropped state (normal train occupancy and false occupancy caused by equipment failure), as shown in Table 1, this embodiment uses the section status as the key discrimination node and combines the track voltage change characteristics to distinguish between multiple scenarios.

[0040] Table 1

[0041] In this embodiment, the working state of the track relay is determined by voltage reading method, that is, the voltage value (track voltage) at both ends of the track relay coil is collected. When the track voltage is greater than the pick-up threshold voltage (e.g., 15V), the track relay is determined to be in the pick-up state. When the track voltage is lower than the drop threshold voltage (e.g., 5V), the track relay is determined to be in the drop state.

[0042] This embodiment determines whether a track section is occupied or idle based on the working status of the track relay. The determination logic is as follows: When the drop in track voltage relative to the reference voltage of the same section in an idle state exceeds a preset threshold, the operating status of the track relay is determined. If the track relay drops, the 25Hz signal received by the track circuit will be insufficient or interrupted, indicating that a train is occupying the track section or a malfunction has occurred. If the track relay is still engaged, meaning the track voltage drops but the track relay does not drop, it usually means that the voltage drop has not yet reached the critical value that would cause the relay to drop. The 25Hz signal that the track circuit can still receive is normal, indicating that the track section is not occupied by a train and is in an idle state. However, there may be hidden dangers such as equipment aging, poor contact, or partial short circuit.

[0043] By using the above logic, we can avoid misreporting normal train occupancy as equipment failure, reduce invalid alarms, and capture abnormal voltage changes before a failure occurs, thus achieving early warning of potential hazards.

[0044] As shown in Table 1, when the drop in track voltage relative to the reference voltage does not exceed the preset threshold (track voltage is normal), if the track relay is activated, it conforms to the state characteristics of a normally idle track section and no operation is required. If the track relay is deactivated, it indicates that a train is occupying the track section or a malfunction has occurred.

[0045] In this embodiment, the fault database and the hidden danger database are knowledge bases pre-stored in the diagnostic host. The diagnostic host has real-time data display, historical data curve display, fault early warning, and alarm functions. It can monitor the status of indoor and outdoor equipment and track circuits in real time. When the data changes abnormally, it realizes the fault area early warning or alarm function through logical operations. Since the electrical parameter distribution characteristics of different track section types are different, the manifestations of faults and hidden dangers are also different. This application establishes fault databases and hidden danger databases for different track section types to achieve accurate diagnosis.

[0046] According to this embodiment, the fault database is used to assist the diagnostic host in identifying the specific fault type and location when a track section is determined to be occupied. Specifically, when the track section is occupied, fault data features are extracted from the preset fault database according to the track section type. The collected electrical parameters are matched with the fault data features. If a match is successful, the corresponding fault code is output, and an alarm signal is triggered simultaneously.

[0047] Track section type is a classification of track sections based on the topology of the track circuits and the signal transmission method within the station. This embodiment reads the type information of the current track section from the station configuration database, such as one-to-one transmitter / receiver, one-to-two transmitter / receiver, or one-to-three transmitter / receiver. Table 2 shows common track section types for 25Hz phase-sensitive track circuits within the station.

[0048] Table 2

[0049] In the fault database, the track section type identifies the type of section to which the fault data applies (any of the following: one-send-one-receiver, one-send-two-receiver, or one-send-three-receiver). The fault code is a unique identifier for a specific fault type. Fault data characteristics identify the electrical parameter combination pattern of the fault (e.g., normal voltage at the sending end, zero voltage at the receiving end, unbalanced current in the choke transformer). The fault location indicates the specific equipment or area where the fault may have occurred. The fault database also provides the fault causes and maintenance suggestions corresponding to the fault codes. For example, if the fault code indicates that the fault cause may be a broken cable, a burnt-out transformer, or loose wiring, the maintenance suggestion is to check the secondary wiring of the receiving end transformer and measure the secondary output voltage.

[0050] The hazard database is used to identify potential risks when a track section is determined to be idle but the track voltage is abnormal. Specifically, when the track section is idle, hazard data features are extracted from the preset hazard database according to the track section type. The collected electrical parameters are matched with the hazard data features. If a match is successful, the corresponding warning code is output, and a warning signal is triggered simultaneously.

[0051] In the hazard database, the track section type identifies the type of section to which the hazard data applies (any one of one-send-one-receiver, one-send-two-receiver, or one-send-three-receiver). The warning code is a unique identifier for a specific hazard type. Hazard data characteristics identify the electrical parameter combination pattern of the hazard (e.g., a 15%-30% drop in receiving voltage, normal relay voltage). The hazard location indicates the specific equipment or area where the hazard may occur. The hazard database also provides the hazard causes and maintenance suggestions corresponding to the warning codes. For example, a warning code might indicate that the hazard cause is contact oxidation, loose terminals, or transformer aging, and the maintenance suggestion is to check the receiving terminal wiring, tighten the terminals, and clean the contacts.

[0052] The characteristics of hidden danger data are similar to those of fault data, but they are usually manifested as parameters deviating from the normal range but not yet triggering the track relay to fall.

[0053] According to this embodiment, when the alarm signal is triggered, the corresponding track section displays a red light band on the control panel; when the warning signal is triggered, the corresponding track section maintains its original display state on the control panel.

[0054] like Figure 3 As shown in the embodiment of this application, a 25Hz phase-sensitive track circuit fault diagnosis system for stations is also provided, including: an outdoor acquisition device, an indoor acquisition device, a communication host, and a diagnostic host.

[0055] Outdoor data acquisition equipment is used to collect electrical parameters of outdoor track circuits.

[0056] The indoor data acquisition equipment is used to collect the track voltage of the indoor track relay.

[0057] The communication host is communicatively connected to the outdoor acquisition device, the indoor acquisition device, and the diagnostic host, respectively, and is used to transmit the acquired data to the diagnostic host.

[0058] like Figure 3 and Figure 4 As shown, the 25Hz phase-sensitive track circuit fault diagnosis system in this station also includes a data acquisition unit. Outdoor data acquisition devices are connected to the acquisition unit via shielded cables or PLC power line carrier communication. The acquisition unit collects and packages the data collected by each outdoor acquisition device and transmits it to the indoor communication host. The indoor acquisition devices are directly connected to the communication host or diagnostic host via cables. The communication host packages the collected data and transmits it to the diagnostic host.

[0059] The diagnostic host has a built-in fault database and a hidden danger database, and outputs diagnostic results to the maintenance terminal or control console. In this embodiment, the diagnostic host is configured to: determine the operating status of the track relay when the change in the track voltage relative to the reference voltage of the same section in an idle state exceeds a preset threshold, and determine whether the track section is occupied or idle based on the operating status of the track relay; when the track section is occupied, output a fault code and trigger an alarm signal; when the track section is idle, output a warning code and trigger a warning signal; and locate the fault location or hidden danger location based on the fault code or the warning code, combined with the electrical parameters.

[0060] Preferably, the outdoor data acquisition device includes a non-contact current acquisition unit and a non-contact voltage acquisition unit.

[0061] The non-contact current acquisition unit is installed at the long and short lines of the traction coil on the rail side of the choke transformer, as well as at the power supply end and power receiving end of the track transformer, to collect the rail lead current of the choke transformer, the power supply end current of the track transformer, and the power receiving end current, respectively.

[0062] Specifically, the choke transformer is located on the side of the rail, and its traction coil is connected to the two rails via long and short wires. Each choke transformer has four lead wires (two per rail, connected to both ends of the traction coil). A non-contact current acquisition unit is installed on each lead wire, collecting a total of four current signals. These four current signals can be used to determine the balance of the traction current, thereby identifying whether the rail is broken or whether the lead wire has poor contact. The track transformer has a current loop at both the power supply and receiving ends. A non-contact current acquisition unit is installed in each of these loops to collect the current at the power supply and receiving ends, respectively. The power supply current reflects the load of the outdoor power source, while the receiving end current reflects the energy state of the signal transmitted to the receiving end.

[0063] In this embodiment, the non-contact current acquisition unit can be a clamp-on current transformer or a through-hole current transformer. A clamp-on current transformer is a current transformer with an open core that is fitted over the outside of the cable or lead wire being tested, without needing to disconnect the existing wiring. A through-hole current transformer passes the conductor being tested through the center hole of the transformer and measures the primary current through induced current.

[0064] The non-contact voltage acquisition unit is installed at both the power supply and receiving ends of the track transformer to acquire the voltage at the power supply and receiving ends of the track transformer, respectively. The voltage at the power supply end of the track transformer is used to determine whether the outdoor power supply is normal. An abnormal drop in voltage indicates a power failure or excessive line voltage drop. The voltage at the receiving end of the track transformer is used to determine whether the signal is effectively transmitted to the receiving end, and is a direct basis for judging the status of the track section.

[0065] In this embodiment, the voltage acquisition point at the power supply end is located on the primary or secondary side of the track transformer, and the voltage acquisition point at the power receiving end is located on the secondary side of the track transformer (output to the indoor track relay side). This non-contact voltage acquisition unit can use an inductive probe attached to the outer insulation layer of the cable or the insulating shell of the terminal block, with no electrical contact between it and the measurement point.

[0066] The indoor data acquisition equipment is installed inside an indoor equipment cabinet. The indoor data acquisition equipment uses a high-impedance voltage acquisition module connected in parallel across the track relay coil to acquire the track voltage from the track relay.

[0067] The diagnostic host has real-time data display, historical data curve display, fault warning and alarm functions. It can monitor the status of indoor and outdoor equipment and track circuits in real time. The diagnostic host also judges the section status by track voltage. When the track voltage is greater than the pick-up threshold voltage, the track relay is determined to be picked up. When the track voltage is less than the drop threshold voltage, the track relay is determined to be dropped.

[0068] like Figure 5 As shown, this system activates alarm or warning functions through logical operations. The operation logic is as follows: When the drop in track voltage relative to the reference voltage of the same section in an idle state exceeds a preset threshold, diagnostic logic is activated. If the track relay is determined to have fallen based on the track voltage, and the track section is determined to be occupied, the normal data and fault data are packaged and sent to the diagnostic host. The diagnostic host outputs an alarm code corresponding to the track section type (one sender and one receiver, one sender and two receivers, one sender and three receivers) and triggers an alarm signal. If the track relay is activated, the track section is determined to be in an idle state (but there may be hidden dangers such as equipment aging, poor contact, or partial short circuit). A warning code corresponding to the track section type is output, and a warning signal is triggered.

[0069] The above logic avoids misreporting normal train occupancy as equipment failure, reduces invalid alarms, and captures abnormal voltage changes before a fault occurs, enabling early warning of potential hazards. At the same time, it does not require modification of the original contact wiring of the track relay, does not affect the safety of the original circuit, and facilitates correlation analysis with track voltage data.

[0070] It should be noted that after the alarm signal is triggered, the fault information is displayed on the control interface of the diagnostic host, and the track section is displayed as a red light band. After the warning signal is triggered, the control interface of the diagnostic host will indicate that there may be a hidden danger, but the track section status still shows as normal.

[0071] Regarding the system in the above embodiments, the specific manner in which each unit module performs operations has been described in detail in the embodiments related to the method, and will not be elaborated here.

[0072] Based on the same inventive concept, this application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed, implement the above-mentioned 25Hz phase-sensitive track circuit fault diagnosis method in the station.

[0073] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.

[0074] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, the functional modules in the various embodiments of this invention can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0075] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0076] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0077] In the above embodiments, the descriptions of each embodiment have their own emphasis. Parts not described in detail in a particular embodiment can be found in the relevant descriptions of other embodiments. Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for diagnosing faults in a 25Hz phase-sensitive track circuit within a station, characterized in that, The method includes: Collect electrical parameters of outdoor track circuit equipment and track voltage of indoor track relays; When the change in the track voltage relative to the reference voltage of the same section in an idle state exceeds a preset threshold, the track section is determined to be occupied or idle based on the working state of the track relay. When the track section is occupied, a fault code is output and an alarm signal is triggered; When the track section is idle, an early warning code is output and an early warning signal is triggered; Based on the fault code or warning code, and in conjunction with the electrical parameters, locate the fault location or potential hazard location.

2. The method according to claim 1, characterized in that, The track circuit equipment includes a track transformer and a choke transformer. The collected electrical parameters include at least the voltage and current at the sending end and the voltage and current at the receiving end of the track transformer, as well as the rail-side lead-in current of the choke transformer.

3. The method according to claim 1, characterized in that, When the track relay is activated, the corresponding track section is in an idle state; when it is deactivated, the corresponding track section is in an occupied state.

4. The method according to claim 1, characterized in that, When the track section is occupied, fault data features are extracted from a preset fault database according to the track section type. The collected electrical parameters are matched with the fault data features, and the corresponding fault code is output after a successful match.

5. The method according to claim 1, characterized in that, When the track section is idle, the system extracts hazard data features from a preset hazard database according to the track section type, matches the collected electrical parameters with the hazard data features, and outputs the corresponding warning code after a successful match.

6. The method according to claim 4 or 5, characterized in that, The track section type is any one of one delivery and one receiving, one delivery and two receiving, or one delivery and three receiving.

7. The method according to claim 1, characterized in that, When the alarm signal is triggered, the corresponding track section will display a red light band on the control panel; When the warning signal is triggered, the corresponding track section will maintain its original display status on the control panel.

8. A fault diagnosis system for a 25Hz phase-sensitive track circuit in a station, characterized in that, The system includes: Outdoor data acquisition equipment is used to collect electrical parameters of outdoor track circuits; Indoor data acquisition equipment is used to collect the track voltage of indoor track relays; A communication host is communicatively connected to the outdoor acquisition device, the indoor acquisition device, and the diagnostic host, respectively, and is used to transmit the acquired data to the diagnostic host; The diagnostic host is configured as follows: When the change in the track voltage relative to the reference voltage of the same section in an idle state exceeds a preset threshold, the working state of the track relay is determined, and the track section is judged to be occupied or idle based on the working state of the track relay. When the track section is occupied, a fault code is output and an alarm signal is triggered; When the track section is idle, an early warning code is output and an early warning signal is triggered; Furthermore, based on the fault code or the warning code, and in conjunction with the electrical parameters, the location of the fault or potential hazard can be determined.

9. The system according to claim 8, characterized in that, The outdoor data acquisition equipment includes: The non-contact current acquisition unit is installed at the long and short wires of the traction coil on the rail side of the choke transformer, as well as at the power supply end and power receiving end of the track transformer, to acquire the rail lead wire current of the choke transformer, the power supply end current and the power receiving end current of the track transformer, respectively. The non-contact voltage acquisition unit is installed at the power supply end and the power receiving end of the track transformer to acquire the voltage at the power supply end and the voltage at the power receiving end of the track transformer, respectively.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed, implement the method described in any one of claims 1-7.

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