Station steel rail potential monitoring terminal

Abstract

According to the station steel rail potential monitoring terminal disclosed by the utility model, through cooperative arrangement of the signal I / O unit, the data processing module and the server module, signals are collected from the steel rail through the signal I / O unit; the signals are subjected to scaling, filtering, common-mode interference removal and isolation processing, so that the accuracy and the stability of the signals are ensured; the data processing module carries out high-speed sampling on the processed signals and carries out data interaction with the server module through modes of 4G / CAT1, WIFI, 100M ETHERNET and the like, the average value, the maximum value and the minimum value of all sampling values are obtained, the sampling values are converted into physical values through the transformation ratio and the offset, data are uploaded to the server module through an MQTT protocol, high-frequency sampling is carried out on the steel rail potential signals, and the steel rail potential signals are sent to the server module. Proper data samples are provided for deep learning in the aspect of railway system management.

Description

Technical Field

[0001] The utility model relates to the technical field of rail potential monitoring, in particular to a station rail potential monitoring terminal and a burning method. Background Technique

[0002] Stray current is a phenomenon that cannot be ignored in urban rail transit, especially in a floating ground system with a DC power supply form of 750V or 1500V. During the current collection process of urban rail transit trains, the rail serves as a return path and undertakes the task of returning the current to the negative pole of the traction substation. However, due to a series of limitations, the rail cannot be completely insulated from the ground, and part of the current leaks from the rail to the ground, which will cause corrosion and interference to the surrounding metal structures.

[0003] Therefore, during the design and operation of urban rail transit, a series of measures need to be taken to reduce and control the generation and diffusion of stray current to ensure the safe, stable and efficient operation of the urban rail transit system. Real-time monitoring of the rail potential is one of the methods to evaluate the harm degree of stray current. However, the existing station rail potential monitoring terminal has a low sampling frequency, low utilization rate of the information contained in the rail potential, and poor accuracy of the results of deep learning using this as a sample. Content of the Utility Model

[0004] The purpose of the utility model is to provide a station rail potential monitoring terminal to solve the problem of low sampling frequency of the station rail potential monitoring terminal in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] A station rail potential monitoring terminal includes a signal I / O unit, a data processing module, a server module and a power supply module. The signal output end of the signal I / O unit is connected to the signal input end of the data processing module. The data processing module and the server module perform data interaction and transmission. The power supply module supplies power to the signal I / O unit and the data processing module respectively;

[0007] The data processing module includes an analog-to-digital conversion unit, a control unit, a data transmission unit and a data storage unit. The signal input end of the analog-to-digital conversion unit is connected to the signal output end of the signal I / O unit, and the signal output end is connected to the signal input end of the control unit. The signal output end of the control unit is respectively connected to the data transmission unit and the data storage unit. The data transmission unit and the server module perform data interaction and transmission.

[0008] In one of the embodiments, the control unit includes one of a single-chip microcomputer or an MCU module.

[0009] In one embodiment, the data transmission unit includes one of 4G or CAT1 or WIFI or 100M ETHERNET.

[0010] In one embodiment, the data storage unit includes FLASH.

[0011] In one embodiment, the power supply module includes a voltage regulation unit.

[0012] In one embodiment, the input voltage range of the power supply module is: (85–305)VAC / (100 - 430)VDC.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] The above-mentioned railway track potential monitoring terminal for a station, through the coordinated setting of the signal I / O unit, data processing module, and server module, collects signals from the railway track through the signal I / O unit; the signals are scaled, filtered, common-mode interference removed, and isolated to ensure the accuracy and stability of the signals; the data processing module performs high-speed sampling on the processed signals and conducts data interaction with the server module through methods such as 4G / CAT1, WIFI, 100M ETHERNET, etc., takes the average value, maximum value, and minimum value of all sampling values, converts them into physical values through the transformation ratio and offset, and uploads the data to the server module through the MQTT protocol, performing high-frequency sampling on the railway track potential signals to provide suitable data samples for deep learning in railway system management. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a railway track potential monitoring terminal for a station in the present utility model;

[0016] Figure 2 is a schematic structural diagram of the data processing module of a railway track potential monitoring terminal for a station in the present utility model;

[0017] Figure 3 is a schematic installation structural diagram of a railway track potential monitoring terminal for a station in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model is provided in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0019] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be intermediate elements present. On the contrary, when an element is referred to as being "directly" connected to another element, there are no intermediate elements.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this utility model belongs. The terms used herein in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] Please refer to Figure 1 、 Figure 2 、 Figure 3 : A station rail potential monitoring terminal, including a signal I / O unit 1, a data processing module 2, a server module 3, and a power supply module 4. The signal output end of the signal I / O unit 1 is connected to the signal output end of the data processing module 2. The data processing module 2 and the server module 3 perform data interaction and transmission. The power supply module 4 supplies electrical energy to the signal I / O unit 1 and the data processing module 2 respectively;

[0022] The data processing module 2 includes an analog-to-digital conversion unit 21, a control unit 22, a data transmission unit 23, and a data storage unit 24. The signal input end of the analog-to-digital conversion unit 21 is connected to the signal output end of the signal I / O unit. The signal output end is connected to the signal input end of the control unit 22. The signal output end of the control unit 22 is respectively connected to the data transmission unit 23 and the data storage unit 24. The data transmission unit performs data interaction and transmission with the server module 3.

[0023] In one embodiment, the control unit 22 includes one of a single-chip microcomputer or an MCU module.

[0024] In one embodiment, the data transmission unit 23 includes one of 4G or CAT1 or WIFI or 100M ETHERNET.

[0025] In one embodiment, the data storage unit 24 includes FLASH.

[0026] In one embodiment, the power supply module 4 includes a voltage regulation unit.

[0027] In one embodiment, the input voltage range of the power supply module is: (85–305)VAC / (100 - 430)VDC.

[0028] The rail potential monitoring terminal collects signals from the rail through the signal I / O unit 1. After processing such as scaling, filtering, common-mode interference removal, and isolation, the signals are sent to the data processing module 2 to ensure the accuracy and stability of the signals. The analog-to-digital conversion unit 21 converts the acquired analog signals into digital signals and sends them to the control unit 22. The control unit 22 transmits the acquired information to the server module 3 through the data transmission unit 23 and simultaneously sends it to the data storage unit 24 for storage.

[0029] In this way, a station rail potential monitoring terminal, through the coordinated settings of the signal I / O unit 1, the data processing module 2, and the server module 3, collects signals from the rail through the signal I / O unit 1; the signals are processed by scaling, filtering, common-mode interference removal, and isolation to ensure the accuracy and stability of the signals; the data processing module 2 performs high-speed sampling on the processed signals and conducts data interaction with the server module 3 through methods such as 4G / CAT1, WIFI, and 100M ETHERNET. The average value, maximum value, and minimum value of all sampling values are taken, converted into physical values through the transformation ratio and offset, and the data is sent to the server module through the MQTT protocol, performing high-frequency sampling on the rail potential signals to provide suitable data samples for deep learning in railway system management.

[0030] Furthermore, the control unit 22 performs high-speed sampling on the processed signals (the default sampling frequency is 12.8 kHz and can be set). During the high-speed sampling of the rail potential signals, if it is detected that the overvoltage exceeds the set value of section 1 or the set value of section 2 of the voltage, the duration data is sent. The terminal monitors the OVPD status in real time, and its default status quantity is 0. If the status changes to 1 within 1 s, the status during this period is 1. Whenever the status of the OVPD changes compared to the previous period, the digital quantity of this channel is sent. The data processing module 2 conducts data interaction with the server module 3 through methods such as 4G / CAT1, WIFI, and 100M ETHERNET, takes the average value, maximum value, and minimum value of all sampling values within 1 s (the upload period can be set), and converts them into physical values through the transformation ratio and offset. The data is sent to the server module 3 through the MQTT protocol.

[0031] For calculating the RMS value in the time domain, the sum of the squares of all amplitudes in the time series should be calculated, then divided by the total number of sample points, and finally the square root is taken. The calculation formula is as follows:

[0032]

[0033] In the formula, K + 1 represents the total number of sample points in the calculation interval.

[0034] Furthermore, the rail potential monitoring terminal has the following functions: First, it supports wide power input and can accept 220V AC or DC power. Second, it has the MQTT data transparent transmission function and can realize data transmission. Third, it supports AT functions, including reset, channel parameter configuration, calibration, pause acquisition, and network update. Fourth, it can perform eight-channel differential voltage acquisition and provide multi-channel data acquisition capabilities. Fifth, it has a high input impedance (greater than or equal to 1MΩ), which helps to improve accuracy and stability. Sixth, it supports JSON data packet encapsulation, which helps with data processing and transmission. Seventh, it can be adapted to external current sensors (±15V DC, 20mA), expanding the applicable range of the sensors. Eighth, it can drive external relays to achieve remote control functions. Ninth, it has a data caching function and can store data in the terminal. Tenth, it supports GPS or Beidou positioning functions to provide location information. Finally, it performs time synchronization through the 4G network or GPS or Beidou to ensure the accuracy and synchronization of data. These functions enable the rail potential monitoring terminal to have powerful data acquisition, transmission, and processing capabilities and are applicable to a wide range of monitoring and control application scenarios. The signal I / O unit 1, data processing module 2, server module 3, and power supply module 4 in the terminal are integrated in a sealed small box and can be directly placed into the OVPD cabinet or single-conductor cabinet to monitor the conduction state of the OVPD or single-conductor in real time.

[0035] The present invention can perform big data mining on the monitored rail potential-related parameters in the Internet of Things cloud, thereby evaluating the rail status of the entire line, improving the safe operation level of the subway, and providing auxiliary decision-making for operation personnel.

[0036] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A station rail potential monitoring terminal, characterized in that: It includes a signal I / O unit, a data processing module, a server module and a power supply module, wherein the signal output end of the signal I / O unit is connected to the signal output end of the data processing module, the data processing module and the server module perform interactive data transmission, and the power supply module provides power to the signal I / O unit and the data processing module respectively; The data processing module includes an analog-to-digital conversion unit, a control unit, a data transmission unit and a data storage unit. The signal input end of the analog-to-digital conversion unit is connected to the signal output end of the signal I / O unit, and the signal output end is connected to the signal input end of the control unit. The signal output end of the control unit is respectively connected to the data transmission unit and the data storage unit. The data transmission unit performs interactive data transmission with the server module.

2. A station rail potential monitoring terminal according to claim 1, characterized in that: The control unit includes a single chip microcomputer or an MCU module.

3. A station rail potential monitoring terminal according to claim 1, characterized in that: The data transmission unit includes one of 4G or CAT1 or WIFI or 100M ETHERNET.

4. A station rail potential monitoring terminal according to claim 1, characterized in that: The data storage unit includes FLASH.

5. The station rail potential monitoring terminal according to claim 1, characterized in that: The power supply module includes a voltage regulating unit.

6. A station rail potential monitoring terminal according to claim 1, characterized in that: The input voltage range of the power supply module is: (85–305)VAC / (100-430)VDC.

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