A Fault Diagnosis System for Turnout Control Circuit

Abstract

The present invention relates to a fault diagnosis system for a turnout control circuit, which is characterized in that: it includes a monitoring center management unit, at least one outdoor collection unit and one indoor collection unit, the outdoor collection unit and the indoor collection unit are respectively connected to the monitoring center management unit network through a network; the monitoring center management unit is used to obtain data from the outdoor collection unit and the indoor collection unit, and perform data analysis and processing through a data trend analysis module to give the state quantity of each data; and is used to obtain historical data from the outdoor collection unit and the indoor collection unit and compare and analyze the real-time collected data to obtain whether there is a potential state change. The present invention can achieve the acquisition of fault location and fault information in a relatively short time, and provide convenience for maintenance personnel to timely judge and subsequently handle the fault.

Description

Technical Field

[0001] The invention relates to a centralized monitoring technology on railways, in particular to a fault diagnosis system for a turnout control circuit. Background Art

[0002] The existing switch control circuit monitoring does not fully cover all equipment, and the monitoring points are all arranged indoors. There is no monitoring of outdoor circuits, and the specific location of the fault cannot be given when a fault occurs.

[0003] Generally speaking, the switch control of turnouts can be divided into two power forms, one is the manual switch machine control method, the other is the electric switch machine control method. These two methods have their own characteristics and should be used in combination with actual conditions. For the former, it is rarely used in my country. Its principle is to control it by manual and electric lock interlocking. For the latter, its advantages are more obvious. It mainly uses an electric motor to drive the point rail of the turnout to switch the position. Both forward switching and directional switching can be achieved. The opening position of the turnout will form two different forms. The advantages of using an electric switch machine are short turnout conversion time, high safety level, and easy to realize automatic control and remote control. At present, electric switch machines are basically popularized in my country's railways.

[0004] At present, the switch control circuits mainly used on railways are AC and DC. According to the number of control cables, they can be divided into four-wire and five-wire turnouts. The control cables are used for the action and indication of the turnouts respectively. In actual on-site applications, cable breaks and short circuits often occur, and indoor turnout control relay combination circuits fail, causing the turnouts to fail to operate normally or fail to give indications normally. After a turnout failure occurs, how to quickly locate, repair and dispose of it in time, reduce the fault delay, restore the driving order, and make emergency preparations for turnout failures is an important part of daily production. Turnout circuit failures are mainly divided into: turnout indication failure, turnout start open circuit failure, turnout start short circuit failure, etc.

[0005] At present, centralized monitoring is basically applied on the railway to monitor the operation of the switch machine and the key points of the indicating circuit, which can monitor and judge the operating status of the turnout circuit to a certain extent.

[0006] However, centralized monitoring does not cover the monitoring of all switch combination relays. At the same time, most of the key monitoring points are empty contacts that are not in use by the relay, but the status of the contacts that are actually in use is not monitored. Therefore, when a fault is detected, it can only reflect the fault of the monitored contacts, and cannot truthfully reflect the status of the contacts that are actually in use. When a fault occurs, human intervention is required for analysis and fault location.

[0007] In addition, the main monitoring point of centralized monitoring is indoors, and the switch machine control circuit is extended to the inside of the outdoor switch machine through cables. Centralized monitoring cannot indicate outdoor cable faults and internal cable faults of the switch machine. Most faults need to be located by experienced on-site personnel through image data analysis and post-analysis of relevant experience data. Summary of the invention

[0008] The purpose of the present invention is to provide a turnout control circuit fault diagnosis system, so as to obtain the fault location and fault information in a relatively short time, so as to facilitate maintenance personnel to timely judge and subsequently handle the fault.

[0009] The technical solution of the present invention is: the present invention relates to a turnout control circuit fault diagnosis system, which is characterized by: comprising: a monitoring center management unit, an indoor collection unit, and an outdoor collection unit, wherein the monitoring center management unit comprises at least one outdoor collection unit and one indoor collection unit, and the outdoor collection unit and the indoor collection unit are respectively connected to the monitoring center management unit network through a network;

[0010] The monitoring center management unit is used to obtain data from the outdoor collection unit and the indoor collection unit, and analyze and process the data through the data trend analysis module to provide the status of each data;

[0011] It is used to obtain historical data from outdoor collection units and indoor collection units and compare and analyze the data collected in real time to determine whether there is a potential state change;

[0012] The decision analysis module compares the result data given by the data trend analysis module with the electrical feature library, analyzes the status information of each circuit, calls the expert library for analysis and identification, and gives relevant fault information through the fault location module; if the expert library does not have relevant fault information, update the expert library;

[0013] The outdoor acquisition unit is used to obtain the real-time AC voltage and AC current of the outdoor switch machine through current sensing and voltage sensing units in a non-contact manner; the current acquires the current passing through each cable, and realizes data conversion through the acquisition and conditioning circuit.

[0014] The indoor collection unit includes: an AC / DC voltage and AC / DC current collection unit, an isolation conditioning circuit, a data collection submodule, a data collection processing unit, a communication unit, and a power supply unit, which supplies the voltages required by the AC / DC voltage and AC / DC current collection unit, the isolation conditioning circuit, the data collection submodule, the data collection processing unit, and the communication unit. The communication unit is connected to the interface of the data collection processing unit, and the information collected by the data collection processing unit is sent to the monitoring center management unit, which performs analysis and processing.

[0015] The AC / DC voltage and AC / DC current collection unit in the indoor collection unit includes: multiple AC / DC voltage collection channels, 3 AC current collection channels and multiple DC current collection channels; wherein the multiple AC / DC voltage collection channel circuits in the AC / DC voltage and AC / DC current collection units include: a thermistor, a fuse and a high-resistance voltage divider; the multiple AC / DC voltage collection channels are installed in the circuit of the switch machine action voltage and the indication voltage, and the multiple AC / DC voltage collection channels are installed in the circuit of the switch machine action voltage and the indication voltage, and the multiple AC / DC voltage collection channels are respectively connected to the data collection submodule interface through the isolation conditioning circuit; the data collection submodule is connected to the data collection processing unit through the interface to realize the voltage sensing collection and processing of the switch machine action voltage and the indication voltage.

[0016] The three AC current acquisition channels are connected to the data acquisition submodule interface through an isolation conditioning circuit; the data acquisition submodule is connected to the data acquisition processing unit through the interface to realize the non-contact method of the switch machine action current and the working current sensor acquisition device of each relay of the turnout combination.

[0017] The AC current sensors in the three AC current collection channels are arranged on the excitation coils of each relay. By collecting the current of the excitation coils, the health status of the relay and the status of other control contacts on its excitation control circuit can be determined.

[0018] The multi-channel DC current acquisition channel is connected to the data acquisition submodule interface through the isolation conditioning circuit; the data acquisition submodule is connected to the data acquisition processing unit through the interface, and the multi-channel DC current acquisition channel acquires the working current of the switch combination relay; the switch machine action voltage and current sensor devices in the multi-channel DC current acquisition channel are arranged at the input and output ends of the phase protection device, and the action voltage and current are acquired through the data acquisition submodule, and the acquired data is uploaded to the data acquisition processing unit.

[0019] The outdoor acquisition unit comprises: an outdoor current acquisition unit, an outdoor voltage acquisition unit, an acquisition conditioning circuit, an outdoor data acquisition processing unit, an outdoor communication unit, and an outdoor power supply unit; the outdoor acquisition unit acquires four-wire and five-wire turnout AC voltage signals leading to the switch machine turnout control circuit through the outdoor current acquisition unit and the outdoor voltage acquisition unit; the outdoor current acquisition unit and the outdoor voltage acquisition unit adopt mutual inductor detection to effectively achieve isolation from the circuit under test, wherein each cable for current acquisition requires a current sensor device, and data conversion is achieved through the acquisition conditioning circuit; each pair of cables for voltage acquisition requires two voltage sensors, and data conversion is achieved through the differential operation circuit, and the converted data is processed and analyzed by the data acquisition processing unit, the actual voltage and current of each monitoring point are calculated, and the data is transmitted to the monitoring center management unit through the communication unit.

[0020] The monitoring center management unit includes: a data acquisition interface module, a data trend analysis module, an expert library, an electrical feature library, a decision analysis module, and a fault location module. The monitoring center management unit collects data from the outdoor acquisition unit and the indoor acquisition unit through the data acquisition module interface, performs data analysis and processing through the data trend analysis module, gives the state quantity of each data, and compares and analyzes whether there is a potential state change through previous historical data. The decision analysis module compares the result data given by the data trend analysis module with the electrical feature library, analyzes the state information of each circuit, calls the expert library for analysis and identification, and gives relevant fault information through the fault location module. If the expert library does not have relevant fault information, the expert library is updated.

[0021] The advantages of the present invention are: the present invention includes a monitoring center management unit, at least one outdoor collection unit and one or more indoor collection units, the outdoor collection unit and the indoor collection unit are respectively connected to the monitoring center management unit network through the network; the monitoring center management unit is used to obtain data from the outdoor collection unit and the indoor collection unit, perform data analysis and processing through a data trend analysis module, and provide the state quantity of each data; it is used to obtain historical data from the outdoor collection unit and the indoor collection unit and compare and analyze the real-time collected data to obtain whether there is a potential state change; the decision analysis module gives the result data through the data trend analysis module to compare the electrical feature library, analyzes the state information of each circuit, calls the expert library for analysis and identification, and provides relevant fault information through the fault location module; if the expert library does not have relevant fault information, the expert library is updated.

[0022] The present invention samples the current of the combined relay excitation circuit through each DC current sensor, analyzes the health status of the relay by comparing the current data with the standard working current in the electrical characteristic library of each relay; and normalizes the data to draw the action logic and timing diagram of the turnout control circuit, and performs fault analysis by comparing the real-time timing of the action with the standard timing in the electrical characteristic library of the turnout control circuit, and gives the specific equipment where the fault occurs according to the analysis result; the voltage and current of the turnout action process also have relatively standard electrical characteristics, and the timing and electrical characteristics of the collected real-time voltage and current are compared and analyzed with the electrical characteristic library data, and the turnout action is given in combination with the expert library data. Circuit trend changes, line break faults, mixed line faults and health status, and give the faulty equipment and possible location information of the fault according to the fault characteristics; the turnout indication circuit gives the switch machine location information when the switch machine is not in action, which is important indication information to ensure the safe passage of trains. Real-time indication voltage collection is carried out through indoor and outdoor turnout indication sensor collection devices. By comparing and analyzing with the electrical feature library data and combining with the expert library data, it can be analyzed whether the indication circuit is normal and the health status of the indication circuit can be given according to the trend data; through fault analysis, it can be determined that the indication circuit has a line break fault, mixed line fault, indication diode breakdown fault, indication relay fault, indication transformer fault and other faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings of the embodiments:

[0024] Figure 1 It is the overall system architecture diagram;

[0025] Figure 2 It is a block diagram of the monitoring center management unit;

[0026] Figure 3 This is the principle block diagram of the outdoor acquisition unit;

[0027] Figure 4 It is a layout diagram of the acquisition sensor device;

[0028] Figure 5 It is the structure diagram of the indoor collection unit;

[0029] Fig. 6 is a layout diagram of the working current sensor device of the turnout combination relay;

[0030] Figure 7 This is the layout diagram of the switch machine action voltage and current sensor device.

[0031] In the figure: 1. Monitoring center management unit; 101. Data acquisition module; 102. Data trend analysis module; 103. Expert database; 104. Electrical characteristic database; 105. Decision analysis module; 106. Fault location module; 2. Indoor acquisition unit; 201. AC and DC voltage acquisition unit; 202. Isolation conditioning circuit; 203. Data acquisition submodule; 204. Data acquisition processing unit; 205. Communication unit; 206. Power supply unit; 207. Multiple AC and DC voltage acquisition channels; 208. 3-way AC current acquisition channels; 209. Multiple DC current acquisition channels; 3. Outdoor acquisition unit; 301. Outdoor current acquisition unit; 302. Outdoor voltage acquisition unit; 303. Acquisition conditioning circuit; 304. Outdoor data acquisition processing unit; 305. Outdoor communication unit; 306. Outdoor power supply unit. DETAILED DESCRIPTION

[0032] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] like Figure 1 As shown, the present invention relates to a turnout control circuit fault diagnosis system, comprising: a monitoring center management unit 1, an indoor collection unit 2, and an outdoor collection unit 3. The monitoring center management unit 1 includes more than one outdoor collection unit 3 and more than one indoor collection unit 2, and the outdoor collection unit 3 and the indoor collection unit 2 are respectively connected to the monitoring center management unit 1 through a network; 2-1, 2-2, 2-n, 3-1, 3-2, and 3-n in the figure represent multiple indoor collection units 2 and outdoor collection units 3 respectively.

[0034] The monitoring center management unit 1 is used to obtain the data of the outdoor collection unit 3 and the indoor collection unit 2, and analyze and process the data through the data trend analysis module to give the state quantity of each data;

[0035] Used to obtain historical data from the outdoor collection unit 3 and the indoor collection unit 2 and compare and analyze the data collected in real time to determine whether there is a potential state change;

[0036] The decision analysis module 105 compares the result data given by the data trend analysis module with the electrical feature library, analyzes the status information of each circuit, calls the expert library for analysis and identification, and provides relevant fault information through the fault location module 106; if the expert library does not have relevant fault information, update the expert library.

[0037] like Figure 2As shown, the monitoring center management unit 1 mainly includes: a data acquisition module 101, a data trend analysis module 102, an expert library 103, an electrical feature library 104, a decision analysis module 105, and a fault location module 106. The monitoring center management unit 1 collects data from the outdoor acquisition unit 3 and the indoor acquisition unit 2 through the data acquisition module interface 101, performs data analysis and processing through the data trend analysis module 102, gives the state quantity of each data, and compares and analyzes whether there is a potential state change through previous historical data. The decision analysis module 105 compares the result data given by the data trend analysis module 102 with the electrical feature library 105, analyzes the state information of each circuit, calls the expert library 103 for analysis and identification, and gives relevant fault information through the fault location module 106. If the expert library 103 does not have relevant fault information, the expert library is updated.

[0038] like Figure 3 As shown, the outdoor acquisition unit 3 is used to obtain the real-time AC voltage and AC current of the outdoor switch machine through current sensing and voltage sensing units in a non-contact manner (to achieve isolation from the circuit under test); the current collects the current passing through each cable, and data conversion is achieved through the acquisition and conditioning circuit.

[0039] Voltage acquisition requires two voltage sensing devices for each pair of cables, and data conversion is achieved through a differential operation circuit; the converted data is processed and analyzed by the data acquisition processing unit, the actual voltage and current of each monitoring point are calculated, and the data is transmitted to the monitoring center management unit 1 through the communication unit.

[0040] like Figure 3 , Figure 4 As shown, the outdoor acquisition unit 3 includes: an outdoor current acquisition unit 301, an outdoor voltage acquisition unit 302, an acquisition conditioning circuit 303, an outdoor data acquisition processing unit 304, an outdoor communication unit 305, and an outdoor power supply unit 306; the outdoor acquisition unit 3 acquires the four-wire and five-wire turnout AC voltage signals leading to the switch machine turnout control circuit through the outdoor current acquisition unit 301 and the outdoor voltage acquisition unit 302; the outdoor current acquisition unit 301 and the outdoor voltage acquisition unit 302 use mutual inductor detection to effectively achieve isolation from the circuit under test, wherein each cable for current acquisition requires a current sensing device, and data conversion is achieved through the acquisition conditioning circuit, and each pair of cables for voltage acquisition requires two voltage sensing devices, and data conversion is achieved through the differential operation circuit, and the converted data is processed and analyzed by the data acquisition processing unit, and the actual voltage and current of each monitoring point are calculated, and the data is transmitted to the monitoring center management unit 1 through the communication unit.

[0041] The sensing and collecting device is arranged in the outdoor box of the switch machine control circuit cable. Through the differential combination of multiple voltage collecting devices in pairs, the fixed operation voltage, reverse operation voltage, positioning indication voltage, and reverse position indication voltage of the switch machine can be measured. The fixed operation current and reverse operation current of the switch machine can be measured through the current collecting device.

[0042] like Figure 5 As shown, the indoor collection unit 2 includes: an AC / DC voltage and AC / DC current collection unit 201, an isolation conditioning circuit 202, a data collection submodule 203, a data collection processing unit 204, a communication unit 205, and a power supply unit 206, which supplies the voltages required by the AC / DC voltage and AC / DC current collection unit 201, the isolation conditioning circuit 202, the data collection submodule 203, the data collection processing unit 204, and the communication unit 205. The communication unit 205 is connected to the interface of the data collection processing unit 204, and sends the information collected by the data collection processing unit 204 to the monitoring center management unit 1, which performs analysis and processing.

[0043] The AC / DC voltage and AC / DC current collection unit 201 in the indoor collection unit 2 includes: multiple AC / DC voltage collection channels 207, three AC current collection channels 208 and multiple DC current collection channels 209;

[0044] The circuit of the multiple AC / DC voltage acquisition channels 207 in the AC / DC voltage and AC / DC current acquisition unit 201 includes: a thermistor, a fuse and a high-resistance voltage divider; the multiple AC / DC voltage acquisition channels 207 are installed in the circuit of the switch machine action voltage and the indication voltage, and the multiple AC / DC voltage acquisition channels 207 are connected to the data acquisition submodule 203 interface through the isolation conditioning circuit 202 respectively; the data acquisition submodule 203 is connected to the data acquisition processing unit 204 through the interface to realize the voltage sensing, acquisition and processing of the switch machine action voltage and the indication voltage.

[0045] like Figure 6 As shown, the three AC current acquisition channels 208 are connected to the data acquisition submodule 203 interface through the isolation conditioning circuit 202; the data acquisition submodule 203 is connected to the data acquisition processing unit 204 through the interface, so that the switch machine action current and the working current sensor acquisition device of each relay of the turnout combination adopt a non-contact method.

[0046] The AC current sensors in the three-way AC current acquisition channel 208 are arranged on the excitation coil of each relay. By acquiring the current of the excitation coil, the health status of the relay and the status of other control contacts in its excitation control circuit can be determined.

[0047] like Figure 7As shown, the multi-channel DC current acquisition channel 209 is connected to the data acquisition submodule 203 interface through the isolation conditioning circuit 202; the data acquisition submodule 203 is connected to the data acquisition processing unit 204 through the interface, and the multi-channel DC current acquisition channel 209 acquires the working current of the switch combination relay.

[0048] The switch machine action voltage and current sensor devices in the multi-channel DC current acquisition channel 209 are arranged at the input and output ends of the phase protection device, and the action voltage and current are collected through the data acquisition submodule, and the collected data are uploaded to the data acquisition processing unit.

[0049] To realize fault diagnosis of turnout control circuit, various types of acquisition sensors are added to the original turnout control circuit, and DC current sensors are added to the locking relay, fixed operation relay, reverse operation relay, one start relay, one start repeater relay, two start relays, positioning indication relay, reverse position indication relay, protection relay, time relay and indication transformer light in the turnout room control circuit. By collecting the values ​​of each sensor, it is determined whether the working status and action sequence of each relay are normal. AC voltage and current sensors are added to the switch action cable and indication cable in the outdoor switch HZ-24 box. During the switch action process, the switch action current and voltage can be measured in real time. After the switch is in place, the switch indication voltage can be measured by the voltage sensor. The system uses indoor and outdoor test data combined with the circuit status to perform overall fault diagnosis.

[0050] The actions of each relay in the switch control circuit have strict timing control and logic control. Only when each relay action meets the timing requirements and logic control requirements can the switch machine operate correctly. The current of the combined relay excitation circuit is sampled through each DC current sensor. The health status of the relay is analyzed by comparing the current data with the standard working current in the electrical characteristic library of each relay, and the data is normalized to draw the action logic and timing diagram of the switch control circuit. By comparing the real-time timing of the action with the standard timing analysis in the electrical characteristic library of the switch control circuit, fault analysis is performed, and the specific equipment where the fault occurs is given according to the analysis results.

[0051] The voltage and current of the turnout operation process also have relatively standard electrical characteristics. Through the collected real-time voltage and current and electrical characteristic library data for timing and electrical characteristic comparative analysis, combined with the expert library data, the trend changes of the turnout operation circuit, line break faults, mixed line faults and health status are given, and the faulty equipment and possible location information of the fault are given according to the fault characteristics.

[0052] The turnout indication circuit gives the switch position information when the switch is not in action. It is an important indication information to ensure the safe passage of trains. Real-time indication voltage is collected through indoor and outdoor turnout indication sensor collection devices. By comparing and analyzing the data with the electrical characteristic library and combining the expert library data, it can be analyzed whether the indication circuit is normal and the health status of the indication circuit can be given based on the trend data. Through fault analysis, it can determine the indication circuit break fault, mixed line fault, indication diode breakdown fault, indication relay fault, indication transformer fault and other faults.

[0053] Through the expert database provided by the system, the expert database is constantly improved according to the faults occurring on site, as well as the accumulation of trend data, the system's fault analysis and location will also be continuously improved.

[0054] The present invention can completely cover all equipment of the turnout control circuit, compare and analyze the state parameters of each equipment with the electrical characteristic library, and provide relevant fault information in combination with the expert library. The present invention extends the monitoring of the turnout control circuit to the outdoors, can truly measure the action of the switch machine and the dynamic data it represents, and reflect the true operating status of the equipment. Through fault analysis, it can quickly locate the fault and provide fault location information. Through trend data analysis, it can evaluate and analyze the health status of each equipment, provide reasonable maintenance suggestions, and truly achieve preventive maintenance.

[0055] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A turnout control circuit fault diagnosis system, characterized in that: include: A monitoring center management unit (1), an indoor collection unit (2), and an outdoor collection unit (3), wherein the monitoring center management unit (1) comprises at least one outdoor collection unit (3) and one indoor collection unit (2), and the outdoor collection unit (3) and the indoor collection unit (2) are respectively connected to the monitoring center management unit (1) via a network; The monitoring center management unit (1) is used to obtain data from the outdoor collection unit (3) and the indoor collection unit (2), and to perform data analysis and processing through the data trend analysis module (102) to provide a state quantity of each data; Used to obtain historical data from the outdoor collection unit (3) and the indoor collection unit (2) and compare and analyze the data collected in real time to determine whether there is a potential state change; The decision analysis module (105) compares the result data given by the data trend analysis module (102) with the electrical characteristic library, analyzes the status information of each circuit, calls the expert library for analysis and identification, and gives relevant fault information through the fault location module (106); if the expert library does not have relevant fault information, the expert library is updated; The outdoor acquisition unit (3) is used to obtain the real-time values ​​of the AC voltage and AC current of the outdoor switch machine in a non-contact manner through the current sensing and voltage sensing units; The current is collected by the sensor to detect the current passing through each cable, and the data is converted through the collection and conditioning circuit. The indoor collection unit (2) comprises: an AC / DC voltage and AC / DC current collection unit (201), an isolation conditioning circuit (202), a data collection submodule (203), a data collection processing unit (204), a communication unit (205), and a power supply unit (206), which supplies the voltages required by the AC / DC voltage and AC / DC current collection unit (201), the isolation conditioning circuit (202), the data collection submodule (203), the data collection processing unit (204), and the communication unit (205); the communication unit (205) is connected to the data collection processing unit (204) interface, and the information collected by the data collection processing unit (204) is sent to the monitoring center management unit (1), and the monitoring center management unit (1) performs analysis and processing; The AC / DC voltage and AC / DC current acquisition unit (201) in the indoor acquisition unit (2) comprises: multiple AC / DC voltage acquisition channels (207), three AC current acquisition channels (208) and multiple DC current acquisition channels (209); wherein the multiple AC / DC voltage acquisition channel (207) circuit in the AC / DC voltage and AC / DC current acquisition unit (201) comprises: a thermistor, a fuse and a high-resistance voltage divider; installed in the circuit of the switch machine action voltage and the indication voltage, the multiple AC / DC voltage acquisition channels (207) are installed in the circuit of the switch machine action voltage and the indication voltage, and the multiple AC / DC voltage acquisition channels (207) are respectively connected to the data acquisition submodule (203) interface through the isolation conditioning circuit (202); the data acquisition submodule (203) is connected to the data acquisition processing unit (204) through the interface to realize voltage sensing acquisition processing of the switch machine action voltage and the indication voltage; The three AC current acquisition channels (208) are connected to the data acquisition submodule (203) interface via the isolation conditioning circuit (202); the data acquisition submodule (203) is connected to the data acquisition processing unit (204) via the interface, and sensing and acquiring the switch machine operating current and the working current of each relay of the turnout assembly are achieved in a non-contact manner; The AC current sensors in the three AC current collection channels (208) are arranged on the excitation coils of the relays, and the health status of the relays and the status of other control contacts on the excitation control circuits thereof are determined by collecting the current of the excitation coils; The multi-channel DC current acquisition channel (209) is connected to the data acquisition submodule (203) interface via the isolation conditioning circuit (202); the data acquisition submodule (203) is connected to the data acquisition processing unit (204) via the interface, and the multi-channel DC current acquisition channel (209) acquires the working current of the switch combination relay; the switch machine action voltage and current sensor devices in the multi-channel DC current acquisition channel (209) are arranged at the input and output ends of the phase protection device, and the action voltage and current are acquired through the data acquisition submodule, and the acquired data is uploaded to the data acquisition processing unit.

2. A turnout control circuit fault diagnosis system according to claim 1, characterized in that: The outdoor acquisition unit (3) comprises: an outdoor current acquisition unit (301), an outdoor voltage acquisition unit (302), an acquisition conditioning circuit (303), an outdoor data acquisition processing unit (304), an outdoor communication unit (305), and an outdoor power supply unit (306); the outdoor acquisition unit (3) acquires four-wire and five-wire turnout AC voltage signals leading to the turnout control circuit of the switch machine through the outdoor current acquisition unit (301) and the outdoor voltage acquisition unit (302); the outdoor current acquisition unit (301) and the outdoor voltage acquisition unit (302) adopt mutual inductor detection to effectively achieve isolation from the circuit under test, wherein each cable of the current acquisition requires a current sensor device, and data conversion is achieved through the acquisition conditioning circuit; each pair of cables of the voltage acquisition requires two voltage sensors, and data conversion is achieved through the differential operation circuit; the converted data is processed and analyzed by the data acquisition processing unit, the actual voltage and current of each monitoring point are calculated, and the data is transmitted to the monitoring center management unit (1) through the communication unit.

3. A turnout control circuit fault diagnosis system according to claim 1, characterized in that: The monitoring center management unit (1) comprises: a data acquisition module (101), a data trend analysis module (102), an expert library (103), an electrical characteristic library (104), a decision analysis module (105), and a fault location module (106). The monitoring center management unit (1) collects data from the outdoor acquisition unit (3) and the indoor acquisition unit (2) through the data acquisition module interface (101), performs data analysis and processing through the data trend analysis module (102), gives the state quantity of each data, and compares and analyzes whether there is a potential state change through previous historical data. The decision analysis module (105) compares the result data given by the data trend analysis module (102) with the electrical characteristic library (105), analyzes the state information of each circuit, calls the expert library (103) for analysis and identification, and gives relevant fault information through the fault location module (106). If the expert library (103) does not have relevant fault information, the expert library is updated.

Images