ZPW2000A trackside circuit monitoring method, system and medium

Abstract

The invention relates to a ZPW2000A trackside circuit monitoring method and system and a medium, and the method comprises the steps: collecting the current of a steel rail lead wire through a lead wire current sensor, collecting the current of a cable side through a cable side current sensor, and recording the timestamp, environment temperature and position information of the collected current; the collected current, temperature and time are uploaded to the communication processing host through the carrier communication host, the communication processing host carries out fault diagnosis and prediction on the received current and time data by using a long and short term memory network, diagnosis results and data are transmitted to the industrial personal computer for display and alarm, and positioning is carried out according to the position information of the sensor. Compared with the prior art, the method has the advantages of real-time fault positioning, high accuracy, high practicability and the like.

Description

Technical Field

[0001] The present invention relates to the field of train signals, and in particular to a ZPW2000A trackside circuit monitoring method, system and medium. Background Art

[0002] At present, the national railway operating mileage has reached 159,000 kilometers, including 45,000 kilometers of high-speed railways, with the maximum operating speed of trains above 350 kilometers per hour and the minimum operating interval of 3 minutes. In the railway system, the CTCS-3 train operation control system is the core safety equipment to ensure the safe and fast operation of trains. The CTCS-3 train control system includes the on-board system and the ground system. The ground system adopts the ZPW-2000 series track circuit system, which transmits track circuit information and train on-board information to the rails at any time, providing important safety functions such as train speed control, tracking interval to ensure train safety, and emergency stop.

[0003] The ZPW-2000 track circuit system includes an indoor system part and an outdoor system part. The indoor system part has a monitoring function, but for the outdoor system equipment, once a fault occurs, it is necessary to go to the site for manual troubleshooting and maintenance. According to the principle of "fault-oriented safety", the train will be triggered to stop, causing large-scale train delays. In addition, the track circuit outdoor system equipment has a wide range along the line and is laid in a scattered manner, making it difficult for electrical maintenance personnel to directly locate the outdoor fault location. Manual analysis and diagnosis takes a long time in fault handling and involves multiple trains. In addition, since the outdoor system equipment is non-redundant equipment, the frequency of failure is relatively frequent. Therefore, it is difficult to diagnose and locate the outdoor track circuit system, the maintenance personnel have high labor intensity, and the low operation and maintenance efficiency seriously affects the operation efficiency of the train. Therefore, how to realize the automatic monitoring of the outdoor track circuit system and quickly locate the fault point is a technical problem that needs to be solved. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a ZPW2000A trackside circuit monitoring method, system and medium. The current and ambient temperature are collected by lead wire current sensors and cable side current sensors, and the collected data are transmitted to the communication processing host by PLC carrier communication. The received current and time data are diagnosing and predicting faults using a long short-term memory network, so that fault diagnosis and positioning can be performed in real time.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] According to one aspect of the present invention, a ZPW2000A trackside circuit monitoring method is provided, which collects rail lead-in current through a lead-in current sensor connected to a collection extension, collects cable side current through a cable side current sensor on the collection extension, and records the timestamp, ambient temperature and location information of the collected current; uploads the collected current, temperature and time to a communication processing host through a carrier communication host; the communication processing host uses a long short-term memory network to perform fault diagnosis and prediction on the received current and time data based on preset current thresholds and temperature thresholds, transmits the diagnosis results and data to an industrial computer for display and alarm, and locates according to the location information of the sensor.

[0007] The communication processing host uses the long short-term memory network to perform fault diagnosis. The specific steps include: collecting the rail lead wire current I connector , Cable side current I cable The data is preprocessed with the ambient temperature T to obtain time series data; the time series data is input into the LSTM layer to obtain the timing information of the fault; the output layer uses the softmax activation function to map the LSTM layer output to the probability distribution of various faults to obtain the fault type and prediction.

[0008] The long short-term memory network adjusts the weight of the loss function L according to the time from the fault occurrence, and the expression is:

[0009]

[0010] Where N is the time step; α is the attenuation coefficient, which controls the weighted strength; t is the time step; T fault is the time step when the fault occurs; y t is the true value; is the predicted value.

[0011] The pre-processing specifically includes: connector , Cable side current I cable The current and temperature are normalized with respect to the ambient temperature T. A sliding window is used to generate time series samples, and normal or fault labels are generated according to preset current and temperature thresholds.

[0012] According to another aspect of the present invention, a ZPW2000A trackside circuit monitoring system is provided, including a lead wire current sensor, a cable side current sensor, an acquisition extension, a carrier communication host, a communication processing host, an industrial computer and a monitoring display module, wherein one communication processing host is connected to four carrier communication hosts, one carrier communication host is divided into four independent PLC channels, one PLC channel can receive data from a maximum of 20 acquisition extensions, one acquisition extension is connected to one cable side current sensor and four lead wire current sensors, and the industrial computer and the monitoring display module are connected to the communication processing host.

[0013] The carrier host is connected to the collection extension via a cable core line.

[0014] The acquisition extension, lead wire current sensor and cable side current sensor are outdoor modules, and the carrier communication host, communication processing host, industrial computer and monitoring display module are indoor modules.

[0015] The PLC channel supports bus connection and star connection. When the detected trackside circuit is on the track within the station, it is star-type, and when the detected trackside circuit is in a block section, it is bus-type.

[0016] According to a second aspect of the present invention, there is provided an electronic device, comprising a memory and a processor, wherein a computer program is stored in the memory, and the method described above is implemented when the processor executes the program.

[0017] According to a third aspect of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, wherein the program implements the method described above when executed by a processor.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) Realize real-time fault detection and accurately locate the fault point: By analyzing the collected current and temperature data, real-time fault diagnosis of the trackside circuits in the automatic block section and platform is realized, the number of cables laid is reduced, and the effect of rapid fault location, prediction of potential faults, real-time online monitoring and reduction of outdoor patrols is achieved, thereby improving equipment reliability and ensuring the stability of train operation.

[0020] (2) Enhanced fault detection accuracy: Due to the time series data of current and temperature sensors, faults usually show certain signs before they occur. By adopting a long short-term memory network that pays more attention to the time step information of the fault, the detection model is more capable of recognizing abnormal changes before and after the fault occurs, making fault detection and prediction more accurate and enabling track faults to be resolved more quickly.

[0021] (3) Enhanced practicality: The collection extension is connected to the indoor carrier communication host through the spare cable of the ZPW-2000 frequency-shifting track itself, which solves the problem that it is impossible to lay a separate cable from the indoor to the trackside for the power line of the trackside collection equipment. In addition, the spare cable of the frequency-shifting automatic block section is directly used as the power supply line and data transmission line of the collection extension, which greatly saves costs and has strong practical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the railway automatic block section;

[0023] Figure 2 This is the block diagram of the trackside monitoring system for ZPW2000A automatic block stations and sections;

[0024] Figure 3 To collect the extension structure diagram;

[0025] Figure 4 This is the structural block diagram of the carrier communication host;

[0026] Figure 5 This is the structural block diagram of the industrial computer and monitoring and display module. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] Example 1

[0029] like Figure 1 The figure shows a schematic diagram of the railway automatic block section. The ZPW-2000 series track circuit system divides the rail into block sections in units of 1km. A set of ZPW-2000 series track circuit system is set up every 1km. At the same time, outdoor trackside equipment is set up at the 1km dividing point. The outdoor trackside equipment is installed on the foundation pile beside the track, and the two ends are connected to the rail with steel-clad copper lead wires. The rails in the general section are designed as double-tracks, one for the up line and the other for the down line. Figure 1 It is a four-display block section. The four-display automatic block is a new type of automatic block system with added green and yellow displays, which warns the idle status of at least three block sections ahead of the train. The braking distance of the train from the maximum speed to stopping is two or more block sections. The length of the block section is appropriately shortened, thereby shortening the train tracking interval and increasing the number of trains passing through the section to meet the requirements of the train braking distance.

[0030] The present embodiment discloses a ZPW2000A trackside circuit monitoring method, which collects rail lead-in current through a lead-in current sensor connected to a collection extension, collects cable side current through a cable side current sensor on the collection extension, and records the timestamp, ambient temperature and location information of the collected current; uploads the collected current, temperature and time to a communication processing host through a carrier communication host; the communication processing host uses a long short-term memory network to perform fault diagnosis and prediction on the received current and time data based on preset current thresholds and temperature thresholds, transmits the diagnosis results and data to an industrial computer for display and alarm, and performs positioning according to the location information of the sensor.

[0031] The communication processing host uses the long short-term memory network to perform fault diagnosis. The specific steps include: collecting the rail lead wire current I connector , Cable side current I cable The data is preprocessed with the ambient temperature T to obtain time series data; the time series data is input into the LSTM layer to obtain the timing information of the fault; the output layer uses the softmax activation function to map the LSTM layer output to the probability distribution of various faults to obtain the fault type and prediction.

[0032] The long short-term memory network adjusts the weight of the loss function L according to the time from the fault to the occurrence of the fault. The expression is:

[0033]

[0034] Where N is the time step; α is the attenuation coefficient, which controls the weighted strength; t is the time step; T fault is the time step when the fault occurs; y t is the true value; is the predicted value.

[0035] The pretreatment specifically includes: connector , Cable side current I cable The current and temperature are normalized with respect to the ambient temperature T. A sliding window is used to generate time series samples, and normal or fault labels are generated according to preset current and temperature thresholds.

[0036] Example 2

[0037] like Figure 2As shown, a ZPW2000A trackside circuit monitoring system includes a lead wire current sensor, a cable side current sensor, a collection extension, a carrier communication host, a communication processing host, an industrial computer and a monitoring display module, wherein one communication processing host is connected to four carrier communication hosts, one carrier communication host is divided into four independent PLC channels, one PLC channel can receive data from up to 20 collection extensions, one collection extension is connected to one cable side current sensor and four lead wire current sensors, and the industrial computer and the monitoring display module are connected to the communication processing host. The carrier host is connected to the cable core wire collection extension.

[0038] The range of the lead wire current sensor is 0~30A; the range of the cable side current sensor is 0~600mA, and the range of the temperature sensor is -40℃~+85℃. The acquisition signal of the acquisition extension is an outdoor frequency shift (1700Hz~2600Hz) signal, and it collects the current of the cable side of 1 transmitting end (or receiving end) and the current of 4 steel-clad copper rail lead wires in real time, and has the function of environmental temperature monitoring. The acquisition extension module sends the collected data to the indoor PLC carrier communication host through the cable core carrier communication. The acquisition extension, lead wire current sensor and cable side current sensor are outdoor modules, and the carrier communication host, communication processing host, industrial computer and monitoring display module are indoor modules. The monitoring display module locates and displays the fault and gives an audible and visual alarm prompt, and records the alarm and recovery time information, which is convenient for electrical personnel to check and replace the faulty outdoor equipment.

[0039] The PLC channel supports bus connection and star connection. When the detected trackside circuit is on the track within the station, it is star connection; when the detected trackside circuit is in the block section, it is bus connection.

[0040] like Figure 3 The following is a block diagram of the data acquisition extension, which is used to complete data acquisition and data transmission and reception. It consists of a remote power carrier module, an MCU control unit, a DSP signal processing unit, a signal acquisition unit, a power supply unit, and a single-phase AC current isolation transmitter.

[0041] like Figure 4 The figure shows the structural block diagram of the carrier communication host. The carrier communication host is used to output isolated AC220V power, establish a power carrier communication connection with the outdoor installed collection extension, provide working power, and parse the data of the collection extension and transmit it to the communication processing host through the CAN bus.

[0042] like Figure 5The following are the industrial computer and monitoring display module. The functions of the monitoring display module include: real-time display of reports of the outdoor monitoring system of the track circuit station and section; alarm analysis and display of the outdoor monitoring system of the track circuit station and section; fault alarm of the working status of the ZPW-2000 series track circuit station or section outdoor system equipment; outdoor analog quantity analysis alarm of the station or section; and curve viewing function of the station or section.

[0043] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the described module can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0044] The electronic device of the present invention includes a central processing unit (CPU), which can perform various appropriate actions and processes according to computer program instructions stored in a read-only memory (ROM) or loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for device operation can also be stored. The CPU, ROM and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0045] A plurality of components in the device are connected to the I / O interface, including: an input unit, such as a keyboard, a mouse, etc.; an output unit, such as various types of displays, speakers, etc.; a storage unit, such as a disk, an optical disk, etc.; and a communication unit, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit allows the device to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks. The processing unit performs the various methods and processes described above, such as the method of the present invention. For example, in some embodiments, the method of the present invention may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit. In some embodiments, part or all of the computer program may be loaded and / or installed on the device via a ROM and / or a communication unit. When the computer program is loaded into the RAM and executed by the CPU, one or more steps of the method of the present invention described above may be performed. Alternatively, in other embodiments, the CPU may be configured to perform the method of the present invention in any other appropriate manner (e.g., by means of firmware).

[0046] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0047] The program code for implementing the method of the present invention can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0048] In the context of the present invention, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A ZPW2000A trackside circuit monitoring method, characterized in that: The rail lead wire current is collected through the lead wire current sensor connected to the collection extension, and the cable side current is collected through the cable side current sensor on the collection extension, and the timestamp, ambient temperature and location information of the collected current are recorded; Upload the collected current, temperature and time to the communication processing host through the carrier communication host; The communication processing host uses a long short-term memory network to perform fault diagnosis and prediction on the received current and time data based on the preset current threshold and temperature threshold, transmits the diagnosis results and data to the industrial computer for display and alarm, and locates according to the location information of the sensor.

2. A ZPW2000A trackside circuit monitoring method according to claim 1, characterized in that: The specific steps of the communication processing host using the long short-term memory network to perform fault diagnosis include: The collected rail lead wire current I connector , Cable side current I cable The data is preprocessed with the ambient temperature T to obtain time series data; the time series data is input into the LSTM layer to obtain the timing information of the fault; the output layer uses the softmax activation function to map the LSTM layer output to the probability distribution of various faults to obtain the fault type and prediction.

3. A ZPW2000A trackside circuit monitoring method according to claim 2, characterized in that: The long short-term memory network adjusts the weight of the loss function L according to the time from the fault occurrence, and the expression is: Where N is the time step; α is the attenuation coefficient, which controls the weighted strength; t is the time step; T fault is the time step when the fault occurs; y t is the true value; is the predicted value.

4. A ZPW2000A trackside circuit monitoring method according to claim 2, characterized in that: The pre-processing specifically includes: connector , Cable side current I cable Normalized with the ambient temperature T; A sliding window is used to generate time series samples and generate normal or faulty labels based on preset current and temperature thresholds.

5. A system for the ZPW2000A trackside circuit monitoring method according to any one of claims 1 to 4, characterized in that: It includes lead wire current sensor, cable side current sensor, acquisition extension, carrier communication host, communication processing host, industrial computer and monitoring display module. Among them, one communication processing host is connected to four carrier communication hosts, one carrier communication host is divided into four independent PLC channels, one PLC channel can receive data from up to 20 acquisition extensions, one acquisition extension is connected to one cable side current sensor and four lead wire current sensors, and the industrial computer and the monitoring display module are connected to the communication processing host.

6. A ZPW2000A trackside circuit monitoring system according to claim 5, characterized in that: The carrier host is connected to the collection extension via a cable core line.

7. A ZPW2000A trackside circuit monitoring system according to claim 5, characterized in that: The acquisition extension, lead wire current sensor and cable side current sensor are outdoor modules, and the carrier communication host, communication processing host, industrial computer and monitoring display module are indoor modules.

8. A ZPW2000A trackside circuit monitoring system according to claim 5, characterized in that: The PLC channel supports bus connection and star connection. When the detected trackside circuit is on the track within the station, it is star-type, and when the detected trackside circuit is in a block section, it is bus-type.

9. An electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein: When the processor executes the program, the method according to any one of claims 1 to 8 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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