An operation monitoring system for urban rail transit interlocking equipment

Abstract

An operation monitoring system for urban rail transit interlocking equipment according to the present invention is characterized in that it at least includes a monitoring center management unit (1) and a field monitoring management unit (2), and the plurality of field monitoring management units (2) are connected to the monitoring center management unit (1) through a network. Such an operation monitoring system for urban rail transit interlocking equipment can obtain the fault location and fault information in a relatively short time, enabling maintenance personnel to promptly judge and subsequently handle the faults.

Description

Technical Field

[0001] The present invention belongs to the technical field of urban rail transit interlocking, and particularly relates to an operation monitoring system for urban rail transit interlocking equipment. Background Art

[0002] Modern urban rail transit is an advanced transportation mode that was first developed in France in the late 1990s. With the successful construction and operation in many European cities and the continuous increase in urban population, the problem of urban traffic congestion has become increasingly severe. The new image and comfortable service of modern urban rail transit have quickly attracted the attention and research of domestic cities. The safety of urban rail transit is of primary importance. The task of the urban rail transit signal system is to ensure train operation safety, coordinate train operation, and improve transportation efficiency.

[0003] The interlocking system is the core equipment in the signal system to ensure train operation safety. The interlocking system mainly ensures train operation safety by formulating a series of interlocking rules to restrict the opening and closing of signals, the rotation of turnouts, and the establishment of routes, etc. The interlocking system realizes the interlocking function with electrical equipment or electronic equipment, and reflects the interlocking function with the outdoor "three major components" of signal machines, power switch machines, and track circuits.

[0004] During the daily operation of this kind of interlocking equipment, there are still the following defects: relevant line circuits are arranged at equipment stations, non-equipment stations, and trackside sites. If a circuit fails, the system can only give an alarm message for the circuit failure, but cannot give the specific location of the fault point; when an interface circuit or module with other non-signal system equipment fails, the existing signal system can also only give an alarm message, and cannot determine whether the fault is a problem of the system itself.

[0005] Therefore, in the current process, when a device fails, maintenance personnel need to use instruments such as multimeters to measure the parameters of each circuit contact of the circuit involved in the alarm message one by one according to the incomplete alarm information provided by the interlocking system, and determine the fault point according to the measured electrical parameters, which greatly delays the fault repair time and has a greater impact on train operation. For some faults that recover automatically instantly, maintenance personnel cannot measure the electrical parameters during the fault in time, which affects the judgment and subsequent processing of the fault, and may even leave potential hidden faults. Summary of the Invention

[0006] The purpose of the present invention is to provide an operation monitoring system for urban rail transit interlocking equipment, so as to obtain the fault location and fault information in a relatively short time, so that maintenance personnel can timely judge and subsequent process the fault.

[0007] To solve the above problems, the object of the present invention is achieved as follows. It relates to an operation monitoring system for urban rail transit interlocking equipment, including a monitoring center management unit and on-site monitoring management units. The multiple on-site monitoring management units are network-connected to the monitoring center management unit through a network.

[0008] Furthermore, the on-site monitoring management unit includes: a switch machine voltage processing module, a DC voltage processing module, an AC voltage processing module, an AC-DC current processing module, etc.; the switch machine voltage processing module, the DC voltage processing module, the AC voltage processing module, the AC-DC current processing module, etc. are all connected to the on-site monitoring management unit.

[0009] Furthermore, each module such as the switch machine voltage processing module, the DC voltage processing module, the AC voltage processing module, the AC-DC current processing module, etc. includes a core acquisition unit and a processing circuit for multiple corresponding modules.

[0010] Furthermore, the operation monitoring system for urban rail transit interlocking equipment further includes a core acquisition unit. The switch machine voltage processing circuit, the DC voltage processing circuit, the AC voltage processing circuit, the AC-DC current processing circuit, etc. are all electrically connected to the core acquisition unit.

[0011] Furthermore, the core acquisition unit is composed of a multiple-channel filtering circuit, a multiple-channel differential multiplexer, a path selection circuit, a conditioning circuit, a low-pass filtering circuit, an AD conversion circuit, an isolation circuit, and a main processor circuit, etc. Each part is electrically connected to realize the core acquisition unit.

[0012] Furthermore, the processing circuits of each module include a switch machine voltage processing circuit, a DC voltage processing circuit, an AC voltage processing circuit, an AC-DC current processing circuit, etc. Each of the processing circuits is electrically connected to the core acquisition unit of each module.

[0013] Furthermore, the sampling circuit of the DC voltage processing circuit is connected in series with a double fuse, and through protection such as high-resistance voltage division and thermistor, etc., it realizes the sampling of the DC voltage and effective isolation and protection from the circuit to be collected.

[0014] Furthermore, the sampling circuit of the AC voltage processing circuit is connected in series with a double fuse, and through a current-type voltage transformer, it realizes the sampling of the AC voltage and effective isolation and protection from the circuit to be collected.

[0015] Furthermore, the sampling circuit of the switch machine voltage processing circuit is connected in series with a double fuse, and through protection circuits such as high-resistance voltage division and an AC-DC voltage acquisition isolation module, etc., it realizes the sampling of the switch machine voltage and effective isolation and protection from the circuit to be collected.

[0016] Furthermore, each processing module is directly or connected to each sampling point through a current sensor.

[0017] Furthermore, the current sensor is a non-invasive current transformer, and the sampling circuit is completely isolated from the current sensor.

[0018] The beneficial effects of the present invention are as follows: The operation monitoring system for urban rail transit interlocking equipment provided by the present invention includes a monitoring center management unit and a plurality of on-site monitoring management units. The plurality of on-site monitoring management units are connected for data communication with the monitoring center management unit. The monitoring center management unit timely collects monitoring data and alarm information from the plurality of on-site monitoring management units, conducts centralized management and storage, and performs statistics and comprehensive analysis on the on-site monitoring data of each unit, so as to realize maintenance warning for the monitored equipment. The on-site monitoring management unit is installed at the station, directly communicates with each processing module, is responsible for reading the system setting parameters, collecting monitoring data, parsing and processing the data, and storing the data in the local database at the same time, so as to realize real-time monitoring and fault alarm, and timely transmit the monitoring data and configuration data to the central management system.

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the principle block diagram of the embodiment of the present invention;

[0021] Figure 2 is the schematic flow diagram of the on-site monitoring management unit;

[0022] Figure 3 is the schematic flow diagram of the monitoring center management unit;

[0023] Figure 4 is the principle block diagram of the first processing unit, the second processing unit, the third processing unit, and the fourth processing unit;

[0024] Figure 5 is the schematic principle diagram of the DC voltage processing module 201;

[0025] Figure 6 is the principle block diagram of the AC voltage processing module 202;

[0026] Figure 7 Principle block diagram of the AC / DC current processing module 203;

[0027] Figure 8 is the principle block diagram of the switch machine voltage acquisition module 204;

[0028] Figure 9 is the schematic diagram of the system power supply;

[0029] In the figure: 1. Monitoring center management unit; 101. Monitoring console; 102. Monitoring extension unit; 2. On-site monitoring management unit; 201. DC voltage processing module; 202. AC voltage processing module; 203. AC / DC current processing module; 204. Switch machine voltage processing module; 301. Multi-channel filtering processing circuit; 302. Differential multi-channel selection circuit; 303. Multi-channel selection circuit; 304. Conditioning circuit; 305. Low-pass filtering circuit; 306. A / D conversion circuit; 307. Isolation module; 308. Main processor; 309. Interface circuit; 31. First processing unit; 32. Second processing unit; 33. Third processing unit; 34. Fourth processing unit. Detailed implementation manners

[0030] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined purpose, the following details the specific implementation manners, structural features and their effects of the present invention in combination with the accompanying drawings and embodiments. Embodiment

[0031] As Figure 1 shown, the present invention relates to an operation monitoring system for urban rail transit interlocking equipment, including a monitoring center management unit 1 and an on-site monitoring management unit 2. The multiple on-site monitoring management units 2 (2-1, 2-2,..., 2-n) and the monitoring center management unit 1 are connected through a network.

[0032] As Figure 2 shown, the on-site monitoring management unit 2 is used to perform the following tasks, including:

[0033] I. Monitoring and diagnosis center

[0034] The on-site monitoring management unit 2 is used for displaying the real-time status information of all monitored devices, monitoring the startup, stop and fault recovery of the devices, real-time display of monitoring data, fault alarm, and querying, statistics, analysis and printing functions for historical monitoring data:

[0035] 1. Among them, real-time data display provides real-time data display curves of various monitoring circuit-related information;

[0036] It provides the overall operation status information of the platform screen door circuit, signal lamp lighting circuit, switch machine circuit, and LEU power supply circuit;

[0037] 2. Real-time fault alarm;

[0038] It is used to provide a graphical alarm interface for real-time display and alarm of fault status;

[0039] It provides the function of canceling and restoring alarms for a certain type of fault;

[0040] Real-time display of suspected faults, determined faults and instantaneous faults during the operation of the device, and provide clickable content information and time information on the corresponding fault information;

[0041] 3. Historical data analysis

[0042] Statistical analysis of historical monitoring data by day and week to obtain suspected fault, determined fault and instantaneous fault information, and provide clickable content information and time information on the corresponding fault information;

[0043] 4. Monitoring device control

[0044] Judgment of timeout or disconnection fault of the acquisition module;

[0045] The acquisition module can automatically recover after a short disconnection or fault;

[0046] Deactivation processing of the acquisition circuit of related devices after the acquisition module fails.

[0047] II. Maintenance center

[0048] Realize the processing of daily maintenance information of monitoring devices and monitoring data, including:

[0049] 1. Equipment maintenance

[0050] Used for configuration management of the acquisition module and processing of configuration information of the device monitoring circuit. The types of device monitoring circuits include at least platform screen door monitoring circuit, signal lamp monitoring circuit, switch machine monitoring circuit, and LEU power supply monitoring circuit;

[0051] Complete the testing and parameter configuration of the monitoring module, including: configuration of address, baud rate, sampling signal type, and working port;

[0052] Configure different types of monitoring circuits in each device, set monitoring parameters for each monitoring point included in the monitoring circuit, set alarm methods and alarm information, as well as configure port information of the corresponding monitoring module. Set thresholds and control logic for system alarm handling of different monitoring circuit faults, and deactivate and restore the monitoring circuit;

[0053] For the signal lamp circuit, its corresponding lighting modes CTC mode and ITC mode, and corresponding configuration parameters can be configured;

[0054] 2. Data maintenance

[0055] Backup and restoration of the database;

[0056] Import and export of the database;

[0057] Upload and download of monitoring configuration data.

[0058] III. For user management, user authorization and authentication, and parameter setting and processing of each unit:

[0059] The above management includes: adding, modifying, deleting, and querying the user accounts for each unit operation;

[0060] Verification of the operation permissions of logged-in users;

[0061] Setting various parameters of the unit, including the data backup time interval, data compression and cleaning time interval, and sampling time.

[0062] As Figure 3 shown, the monitoring center management unit 1 is used to obtain on-site monitoring data from different on-site monitoring management units 2, store and process it, statistically analyze the on-site monitoring data, and display the obtained on-site monitoring data and processed data;

[0063] Compared with the on-site monitoring management unit 2, the monitoring center management unit 1 includes a centralized monitoring console 101 and a monitoring extension unit 102, which are used to display the real-time status information of the on-site monitoring data obtained from different on-site monitoring management units 2.

[0064] Compared with the on-site monitoring management unit 2, the monitoring extension unit 102 of the monitoring center management unit 1 adds and deletes all the monitored extension unit objects to be managed, and configures the communication and management parameters.

[0065] As Figure 1 shown, it is a block diagram of the on-site monitoring management unit 2.

[0066] The on-site monitoring management unit 2 at least includes: a DC voltage processing module 201, an AC voltage processing module 202, an AC-DC current processing module 203, a switch machine voltage processing module 204; the DC voltage processing module 201, the AC voltage processing module 202, the AC-DC current processing module 203, and the switch machine voltage processing module 204 are respectively network-linked to the monitoring center management unit 1 through corresponding first processing unit 31, second processing unit 32, third processing unit 33, and fourth processing unit 34.

[0067] The present invention further includes a first processing unit 31, a second processing unit 32, a third processing unit 33, and a fourth processing unit 34. The first processing unit 31, the second processing unit 32, the third processing unit 33, and the fourth processing unit 34 are respectively electrically connected to a platform screen door monitoring module, a switch machine monitoring module, and a signal monitoring module.

[0068] The first processing unit 31, the second processing unit 32, the third processing unit 33, and the fourth processing unit 34 are for the generality of the sampling circuit, facilitating future expansion and upgrade. The sampling module completes different circuit conversions through the core processing unit (the first processing unit 31, the second processing unit 32, the third processing unit 33, the fourth processing unit 34).

[0069] As Figure 4 shown, the first processing unit 31, the second processing unit 32, the third processing unit 33, and the fourth processing unit 34 have the same circuit structure, all including: a multi-channel filtering processing circuit 301, a differential multi-channel selection circuit 302, a multi-channel selection circuit 303, a conditioning circuit 304, a low-pass filtering circuit 305, an A / D conversion circuit 306, an isolation module 307, a main processor 308, and an interface circuit 309. After passing through the isolation module 307, the main processor 308 is divided into two paths. One path is electrically connected to the A / D conversion circuit 306 to obtain the on-site signal selected by the multi-channel filtering processing circuit 301, and the other path is electrically connected to the multi-channel selection circuit 303 to send a selection address to the multi-channel selection circuit 303, and different on-site signals are selected for input through the selection address; the on-site signal selected by the multi-channel selection circuit 303 then enters the conditioning circuit 304 and the low-pass filtering circuit 305 through the differential multi-channel selection circuit 302 to the A / D conversion circuit 306, and the A / D conversion circuit 306 converts the on-site analog signal into a digital signal, which is optically isolated to the main processor 308. The reference voltage of the A / D conversion circuit 306 is provided by the reference voltage circuit 310, and the main processor 308 is electrically connected to the monitoring center management unit 1 network through the interface circuit 309.

[0070] Figure 5 The circuit schematic diagram of the DC voltage processing module 201 is given. Fuses are added between the high and low ends of the voltage input collector. When the current exceeds the rated value, it melts instantly to prevent short circuits between the input terminals. A thermistor is connected in series in the voltage dividing circuit and takes effect when the input loop current exceeds a certain value. The resistance value is increased to several megohms within dozens of milliseconds until it burns out and opens the circuit. The high and low ends of the current limiting resistor use metal oxide film resistors. After the high-voltage and high-power input is sampled by voltage division through the current limiting resistor, it is reduced to a weak voltage signal and then passes through the isolation circuit and is filtered and processed before being connected to the first processing unit 31 to realize the acquisition of DC voltage. Isolation circuits are used between each channel to ensure that the channels do not affect each other.

[0071] Figure 6 For the circuit schematic diagram of the AC voltage processing module 202, the input AC signal is converted into a weak signal at the rear stage through a current limiting resistor and an AC current transformer, and then reaches the second processing unit 32 through the AC voltage to DC voltage circuit. The second processing unit 32 simultaneously accesses the signals of multiple AC voltage sampling points.

[0072] The mutual inductor has a relatively high impedance, and together with the current-limiting resistor, it can ensure that the monitoring circuit has no impact on the second processing unit 32. At the same time, a fuse is connected in series in the sampling circuit, which can be instantly blown in case of a short circuit to ensure the safety of the main circuit. The same method is used for AC current sampling as for DC current sampling. The AC voltage sampling is collected through an AC mutual inductor to achieve isolation from the second processing unit 32.

[0073] Figure 7 Figure 203 is the circuit schematic diagram of the AC / DC current processing module. Both AC and DC current samplings are obtained through current sensors. The current sensors are non-access current mutual inductors, and the circuit to be sampled is completely isolated from the current sensors, having no impact on the circuit to be sampled. After the signal output by the current sensor is converted into a DC voltage signal, it is collected and processed by the third processing unit 33.

[0074] Figure 8 Figure 204 is the circuit schematic diagram of the switch machine voltage processing module. The switch machine voltage processing module 204 includes: a switch machine voltage acquisition circuit composed of multiple paths of fuses, thermistors, voltage-dividing resistors, and isolation circuits. The multiple-path voltage acquisition circuit is electrically connected to the fourth processing unit 34. Fuses and voltage-dividing resistors are respectively connected in series at the positive and negative input ends of the switch machine voltage acquisition circuit, a thermistor is connected in series at the positive input end, and both ends of the positive and negative input ends are electrically connected to the fourth processing unit 34 through the isolation circuit.

[0075] The switch machine indication voltage is an AC / DC mixed signal. Since the indication voltage signal may be mixed with a high voltage of 380V, it must be subjected to high-resistance current limiting and other protections before the indication voltage collector converts the collected signal voltage into AC and DC components and connects the DC and AC components to the fourth processing unit 34. When testing the switch machine turnout indication voltage, there will be an extremely high reverse electromotive force, and this voltage can reach more than 2500V instantaneously, causing a huge impact on the voltage acquisition circuit, so the circuit needs special treatment. The entire circuit uses high-resistance voltage division, and fuses are added respectively between the high and low ends of the voltage input collector. When the current exceeds the rated value, it will be instantly blown to prevent a short circuit between the input terminals. A thermistor is connected in series in the voltage-dividing circuit and takes effect when the input loop current exceeds a certain value, increasing the resistance value to several megohms within dozens of milliseconds until it burns out and opens the circuit.

[0076] To enhance the anti-interference ability of the system and improve the AD acquisition accuracy and stability of the system, the system power supply is as Figure 9 shown. The system adopts a three-stage power supply processing method, namely the AC / DC, DC / DC, and LDO (low dropout linear regulator) methods. In addition, to reduce the interference between the analog power supply and the digital power supply, this system uses an isolated power supply to isolate the digital power supply, the analog / digital interface power supply, and the analog power supply, ensuring the independence of each power supply ground.

[0077] In summary, the present invention includes a monitoring center management unit 1 and a plurality of on-site monitoring management units 2. The plurality of on-site monitoring management units 2 are connected to the monitoring center management unit 1 for data connection. The monitoring center management unit 1 timely collects monitoring data and alarm information from the plurality of on-site monitoring management units 2, conducts centralized management and storage, and statistically analyzes and comprehensively analyzes each on-site monitoring data to realize maintenance warning for the monitored equipment. The on-site monitoring management unit 2 is installed at the station, directly communicates with each processing module, is responsible for reading system setting parameters, collecting monitoring data, parsing and processing the data, and storing it in the local database at the same time, realizing real-time monitoring and fault alarm, and timely transmitting the monitoring data and configuration data to the central management system.

[0078] For the circuit construction of a specific system, a circuit that meets the requirements can be selected from the prior art according to its specific implemented functions, and details are not described in this embodiment.

[0079] The above content is a further detailed description of the present invention in combination with specific preferred implementation manners. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. An operation monitoring system for urban rail transit interlocking equipment, characterized in that it at least includes: a monitoring center management unit (1) and a field monitoring management unit (2), and the multiple field monitoring management units (2) are connected to the monitoring center management unit (1) through a network; The field monitoring management unit (2) is used to perform the following tasks, including: I. Monitoring and diagnosis center The field monitoring management unit (2) is used for displaying the real-time status information of all monitored equipment, monitoring the startup, stop, and fault recovery of the equipment, real-time display of monitoring data, fault alarm, and querying, statistics, analysis, and printing functions of historical monitoring data:

1. Among them, Real-time data display, providing real-time data display curves of various monitoring circuit-related information; Providing overall operating status information of the platform screen door circuit, signal lamp lighting circuit, switch machine circuit, and LEU power supply circuit; 2. Real-time fault alarm; Used to provide a graphical alarm interface for real-time fault status display and alarm; Providing the function of canceling and restoring alarms for certain types of faults; Real-time display of suspected faults, confirmed faults, and instantaneous faults during the operation of the device, and providing click-to-view content information and time information on the corresponding fault information; 3. Historical data analysis Statistical analysis of historical monitoring data by day and week to obtain suspected faults, confirmed faults, and instantaneous fault information, and providing click-to-view content information and time information on the corresponding fault information; 4. Monitoring device control Judgment of timeout or disconnection faults of the acquisition module; The acquisition module can automatically recover after a short-term disconnection or fault; Deactivation processing of the acquisition circuit of related devices after the acquisition module fails; II. Maintenance center Realize the processing of daily maintenance information of monitoring devices and monitoring data, including:

1. Equipment maintenance Used for configuration management of the acquisition module and processing of configuration information of the device monitoring circuit. The types of device monitoring circuits include at least platform screen door monitoring circuit, signal machine monitoring circuit, switch machine monitoring circuit, and LEU power supply monitoring circuit; Complete the testing and parameter configuration of the monitoring module, including: configuration of address, baud rate, sampling signal type, and working port; Configure different types of monitoring circuits in each device, set monitoring parameters for each monitoring point included in the monitoring circuit, set alarm methods and alarm information, as well as configure port information of the corresponding monitoring module, and set thresholds and control logic for system alarm processing of different monitoring circuit faults, and deactivate and restore the monitoring circuit; For the signal lamp circuit, its corresponding lighting modes CTC mode and ITC mode, and corresponding configuration parameters can be configured; 2. Data maintenance Backup and restoration of the database; Import and export of the database; Upload and download of monitoring configuration data; III. Used for user management, user authorization and authentication, and setting and processing of each unit parameter: The above management includes: addition, modification, deletion, and query of user accounts for each unit operation; Verification of the operation permissions of logged-in users; Setting of various parameters of the unit, including data backup time interval, data compression and cleaning time interval, and sampling time; The monitoring center management unit (1) is used to obtain on-site monitoring data from different on-site monitoring management units (2), store and process it, statistically analyze the on-site monitoring data, and display the obtained on-site monitoring data and processed data; the monitoring center management unit (1) also includes a centralized monitoring console (101) and a monitoring extension unit (102), which are used to display the real-time status information of the on-site monitoring data obtained from different on-site monitoring management units (2); the monitoring extension unit (102) of the monitoring center management unit (1) adds, deletes, configures communication and management parameters for all managed monitoring extension unit objects; the on-site monitoring management unit (2) at least includes: a DC voltage processing module (201), an AC voltage processing module (202), an AC / DC current processing module (203), and a switch machine voltage processing module (204); the DC voltage processing module (201), the AC voltage processing module (202), the AC / DC current processing module (203), and the switch machine voltage processing module (204) are respectively network-linked to the monitoring center management unit (1) through corresponding first processing unit (31), second processing unit (32), third processing unit (33), and fourth processing unit (34).

2. The operation monitoring system for an urban rail transit interlocking device according to claim 1, wherein: The first processing unit (31), the second processing unit (32), the third processing unit (33), and the fourth processing unit (34) have the same circuit structure, and all include: a multi-channel filtering processing circuit (301), a differential multi-channel selection circuit (302), a multi-channel selection circuit (303), a conditioning circuit (304), a low-pass filtering circuit (305), an A / D conversion circuit (306), an isolation module (307), a main processor (308), and an interface circuit (309). After passing through the isolation module (307), the main processor (308) is divided into two paths. One path is electrically connected to the A / D conversion circuit (306) to obtain the on-site signal selected by the multi-channel filtering processing circuit (301), and the other path is electrically connected to the multi-channel selection circuit (303) to send a selection address to the multi-channel selection circuit (303), and different on-site signals are selected through the selection address; the on-site signal selected by the multi-channel selection circuit (303) then enters the conditioning circuit (304) and the low-pass filtering circuit (305) through the differential multi-channel selection circuit (302) and reaches the A / D conversion circuit (306). The A / D conversion circuit (306) converts the on-site analog signal into a digital signal, and it reaches the main processor (308) through optoelectronic isolation; the reference voltage of the A / D conversion circuit (306) is provided by the reference voltage circuit (310), and the main processor (308) is network-electrically connected to the monitoring center management unit (1) through the interface circuit (309).

3. The operation monitoring system for an urban rail transit interlocking device according to claim 1, characterized in that: The DC voltage processing module (201) includes: there are fuses, current-limiting resistors, thermistors, a first processing unit (31) and an isolation circuit between the high and low ends of the voltage input collector. When the current exceeds the rated value, it melts instantly to prevent short circuits between the input terminals; a thermistor is connected in series in the voltage-dividing circuit, and the high and low ends of the current-limiting resistor use metal oxide film resistors. After the high-voltage input of the strong electricity is sampled by voltage division through the current-limiting resistor, it is reduced to a weak voltage signal and then passes through the isolation circuit. After filtering processing, it is connected to the first processing unit (31) to achieve the acquisition of DC voltage.

4. The operation monitoring system for an urban rail transit interlocking device according to claim 1, wherein: The AC voltage processing module (202) includes: a current-limiting resistor, an AC voltage to DC voltage conversion circuit, an AC mutual inductor and a second processing unit (32). The input AC signal is converted into a weak signal at the subsequent stage through the current-limiting resistor and the AC mutual inductor, and then reaches the second processing unit (32) through the AC voltage to DC voltage conversion circuit. The second processing unit (32) is simultaneously connected to the signals of multiple AC voltage sampling points.

5. The operation monitoring system for urban rail transit interlocking equipment according to claim 1, wherein: AC and DC current The processing module (203) includes: a current sensor and a third processing unit (33). The AC and DC current sampling is obtained through the current sensor. The signal output by the current sensor is converted into a DC voltage signal and then enters the third processing unit (33). The third processing unit (33) is electrically connected to the monitoring center management unit (1) through an interface.

6. The operation monitoring system for an urban rail transit interlocking device according to claim 1, wherein: The switch machine voltage processing module (204) includes: a switch machine voltage acquisition circuit composed of multiple paths of fuses, thermistors, voltage-dividing resistors and isolation circuits. The multiple-path voltage acquisition circuit is electrically connected to the fourth processing unit (34). Fuses and voltage-dividing resistors are respectively connected in series at the positive and negative input terminals of the switch machine voltage acquisition circuit, a thermistor is connected in series at the positive input terminal, and the two endpoints of the positive and negative input terminals are electrically connected to the fourth processing unit (34) after passing through the isolation circuit.

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