Four-mode train tail locomotive platform device and implementation method

Abstract

The invention discloses a four-module train tail locomotive platform device and an implementation method. The device comprises a digital / analog channel machine module, a 400K wireless communication module, an LTE-R communication unit, a control unit and a power supply unit. By adopting the modular design, the system can be switched among a plurality of communication modes, and is compatible with the existing 400K special wireless communication frequency band, 400M special wireless communication frequency band and LTE-R novel broadband wireless communication mode of the railway. According to the technical implementation of the invention, through the configuration integration of the LTE-R communication unit, the digital / analog channel machine module and the 400K wireless communication module in the train wireless dispatching communication platform, the intercommunication compatibility of analog communication, digital communication, LTE-R and 400K signals is realized, and the communication capability of full-line running in various modes of the whole line of a national energy group is realized. Meanwhile, multi-mode data fusion is carried out through the control unit, and it is ensured that communication formats of all modes are compatible.

Description

Technical Field

[0001] The invention relates to a locomotive platform at the end of a train, and in particular to a four-mode locomotive platform device at the end of a train and a realization method thereof. Background Art

[0002] The tail locomotive platform is one of the important equipment for the safe operation of railway transportation. It is mainly used to monitor the status of the tail of the train and ensure the safety and efficiency of train operation. With the modernization and intelligent development of the railway transportation system, the traditional tail locomotive platform is gradually unable to meet the needs in complex scenarios, especially in the operation mode of long section and full section running, which requires higher reliability, adaptability and intelligence.

[0003] The railway transportation system operating nationwide covers a variety of complex environments and operation modes. Its tail locomotive station needs to be compatible with different frequency band communication protocols, such as 400M, 400K and LTE-R, to achieve reliable two-way communication between the tail of the train and the front of the locomotive, while meeting the needs of long-term, high-intensity operations. Therefore, designing a tail locomotive station device and implementation method suitable for full-section running can not only improve the stability and reliability of the equipment, but also meet the complex needs of multiple scenarios, which has important technical significance and application value. Summary of the invention

[0004] In view of the existing technical status and problems, the present invention provides a four-mode tail locomotive platform device and an implementation method, aiming to meet the multi-mode communication needs under complex scenarios of national energy railways and improve the safety, communication efficiency and reliability of train operation.

[0005] The technical solution adopted by the present invention is: a four-mode tail-end locomotive device includes a power supply unit for providing stable power support for the four-mode tail-end locomotive device, a 400K wireless communication module for realizing data transmission in the railway 400K dedicated wireless communication frequency band, a digital / analog channel machine module for realizing communication conversion and signal transmission between analog channels and digital channels, and a control unit for fusion, protocol conversion and status management of multi-mode communication data of the four-mode tail-end locomotive device.

[0006] The control unit includes a single-chip microcomputer of model RT1021, a memory chip, a clock chip, a CPLD chip, a serial port expansion circuit, a protocol conversion circuit 1 of model MAX202E, a protocol conversion circuit 2 of model MAX490E, a channel machine communication interface, a 400K communication interface and a power conversion circuit; the single-chip microcomputer is respectively connected to the memory chip, the clock chip, the CPLD chip, the serial port expansion circuit, the 400K communication interface, and the protocol conversion circuit 2, wherein the CPLD chip is connected to the channel machine communication interface, the serial port expansion circuit is respectively connected to the channel machine communication interface and the protocol conversion circuit 1, the channel machine communication interface is connected to the digital / analog channel machine module, and the 400K communication interface is connected to the 400K wireless communication module.

[0007] The power supply unit is respectively connected to the digital / analog channel machine module and the power conversion circuit; the four-mode locomotive device at the end of the train is connected to the LTE-R communication module of the wireless dispatch communication vehicle through a data interface; the four-mode locomotive device at the end of the train is wirelessly connected to the host at the end of the train.

[0008] The implementation method is to include a workflow for the four-mode tail locomotive platform device, which performs the following operations: A1. When the four-mode train tail locomotive device has not established a connection with the train tail host, first, the four-mode train tail locomotive device determines whether the LTE-R network is registered.

[0009] A2. If the LTE-R network is not registered, the digital / analog channel machine sends a 400M digital connection establishment command to the host at the end of the column, and then determines whether a connection is established with the host at the end of the column; if it is determined that a connection has been established with the host at the end of the column, it enters the working state of the 400M digital / 400K working command.

[0010] A3. If after 3 seconds, it is determined that no connection is established with the host at the end of the column, a 400M simulation connection establishment instruction is sent to the host at the end of the column again; then it is determined again whether a connection is established with the host at the end of the column. If it is determined that a connection is established with the host at the end of the column, the working state of the 400M simulation / 400K working instruction is entered, otherwise, it returns to step A1.

[0011] A4. If the four-mode train tail locomotive determines that the LTE-R network has been registered, the LTE-R communication module sends an LTE-R connection establishment instruction to the train tail host; then it determines whether a connection is established with the train tail host. If it is determined that a connection is established with the train tail host, it enters the working state of the LTE-R / 400K working instruction, otherwise it returns to step A1.

[0012] A5, 400M digital communication module sends 400M digital connection establishment instruction to the host at the end of the column; then determines whether the connection with the host at the end of the column is established. If it is determined that the connection with the host at the end of the column has been established, it enters the working state of 400K / 400M digital / LTE-R working instruction.

[0013] A6. If after 3 seconds, it is determined that no connection is established with the host at the end of the column, a 400M simulation connection establishment instruction is sent to the host at the end of the column again; then it is determined again whether a connection is established with the host at the end of the column. If it is determined that a connection is established with the host at the end of the column, the working state of the 400M simulation / 400K / LTE-R working instruction is entered, otherwise, it returns to step A1.

[0014] The present invention adopts modular design, and the system can switch between multiple communication modes, and is compatible with the existing 400K dedicated wireless communication frequency band, 400M dedicated wireless communication frequency band and LTE-R new broadband wireless communication mode of the railway. In terms of technical implementation, the present invention realizes the intercommunication and compatibility of analog communication, digital communication, LTE-R and 400K signals through the configuration integration of the LTE-R communication unit in the train wireless dispatching communication vehicle station with the digital / analog channel machine module and the 400K wireless communication module, and realizes the communication capability of running all lines in various modes. At the same time, multi-mode data fusion is performed through the control unit to ensure that the communication formats of each mode are compatible with each other.

[0015] The beneficial effects of the present invention are as follows: the present invention integrates communication modules of the 400K frequency band, the 400M frequency band and the LTE-R frequency band, and adopts an intelligent control unit for unified management, thereby not only realizing seamless switching and collaborative work of multi-mode communications, but also meeting the needs of the National Energy Railway for long-section and full-section running operation modes, thereby greatly improving the safety, communication efficiency and reliability of train operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a block diagram of the four-mode train tail locomotive platform device structure of the present invention; Figure 2 It is a flow chart for realizing the working mode of the four-mode tail locomotive platform device of the present invention. DETAILED DESCRIPTION

[0017] like Figure 1 As shown, the four-mode tail-of-train locomotive device includes a power supply unit for providing stable power support for the four-mode tail-of-train locomotive device, a 400K wireless communication module for realizing data transmission in the railway 400K dedicated wireless communication frequency band, a digital / analog channel machine module for realizing communication conversion and signal transmission between analog channels and digital channels, and a control unit for fusion, protocol conversion and status management of multi-mode communication data of the four-mode tail-of-train locomotive device.

[0018] The control unit includes a single-chip microcomputer of model RT1021, a memory chip, a clock chip, a CPLD chip, a serial port expansion circuit, a protocol conversion circuit 1 of model MAX202E, a protocol conversion circuit 2 of model MAX490E, a channel machine communication interface, a 400K communication interface and a power conversion circuit; the single-chip microcomputer is respectively connected with the memory chip, the clock chip, the CPLD chip, the serial port expansion circuit, the 400K communication interface and the protocol conversion circuit 2, wherein the CPLD chip is connected with the channel machine communication interface, the serial port expansion circuit is respectively connected with the channel machine communication interface and the protocol conversion circuit 1, the channel machine communication interface is connected with the digital / analog channel machine module, and the 400K communication interface is connected with the 400K wireless communication module.

[0019] The power supply unit is respectively connected to the digital / analog channel machine module and the power conversion circuit; the four-mode tail locomotive device is connected to the LTE-R communication module of the wireless dispatch communication vehicle through the data interface; the four-mode tail locomotive device is wirelessly connected to the tail host.

[0020] The power supply unit converts the DC 110V into the DC 13.8V power supply required by other units or modules in the four-mode train tail locomotive station device. The control unit transmits the channel machine communication data with the digital / analog channel machine module through the channel machine interface, transmits the 400K communication data with the 400K wireless communication module through the 400K wireless communication module interface, and transmits the LTE-R communication data with the LTE-R communication module of the external wireless dispatch communication vehicle station through the LTE-R data interface.

[0021] The power conversion circuit uses a switching power chip (model: LM22670) to convert DC 13.8V to 7.8V, and supplies power to the 400K wireless communication module through the 400K communication interface. A switching power chip (model: LM22670) is used to convert DC 13.8V to 5V. A switching power chip (model: SPX1117-3.3) is used to convert DC 13.8V to 3.3V to provide the required power supply for various circuits and chips inside the control unit. A storage chip (model: MX66L51235F) is used for data recording and storage of the locomotive at the end of the train. A clock chip (model: DS3231SN) is used for clock calibration. A CPLD chip (model: 5M40ZE64I5) is used for the SSI bus interface of the single-chip microcomputer 1021 chip is 16 bits, 3.3V logic level and the SSI bus interface of the digital / analog channel machine module is 128 bits, 1.8V logic level, and mutual timing conversion.

[0022] The serial port expansion circuit uses a chip (model: ST16C554) to expand one UART interface to three UART interfaces. Protocol conversion circuit 1 uses chip MAX202E to convert UART data into RS-232 data bidirectionally for channel machine communication interface communication. Protocol conversion circuit 2 uses chip MAX490E to convert UART data into RS-422 data bidirectionally. The four-mode train tail locomotive device is connected to the data interface by a cable, and is connected to the LTE-R communication module of the wireless dispatch communication vehicle by a cable for data interaction.

[0023] The four-mode tail locomotive platform device adopts a modular design. The power supply unit is used to provide stable power support for each module in the system to ensure long-term and reliable operation of the equipment. The 400K wireless communication module is used to achieve efficient data transmission in the railway-specific 400K frequency band to meet the needs of traditional wireless communication. The digital / analog channel machine module is used to realize communication conversion and signal transmission between analog channels and digital channels, and is compatible with multiple channel types. The LTE-R communication module is used to support the new broadband wireless communication of railway LTE-R. It has high-speed and low-latency communication characteristics and is used for broadband data service transmission and real-time dispatch communication. The control unit is used as the core control module to integrate multi-mode communication data, complete protocol conversion, system status management, mode switching and fault diagnosis functions, and realize seamless collaboration and stable operation between modules. The control unit realizes the interconnection and interoperability of the digital / analog channel machine module, 400K wireless communication module and LTE-R communication module through the communication interface, and supports data fusion and protocol conversion between analog signals, digital signals, 400K signals and LTE-R signals. The control unit also has a multi-mode automatic switching function, which can quickly switch between different communication modes according to the operating scenario, and monitor the system status in real time to improve the intelligence level and reliability of system operation.

[0024] like Figure 2 As shown, the implementation method of the four-mode train tail locomotive platform device is the implementation method of confirming the working mode. The four-mode train tail locomotive platform device contains a workflow, and the workflow performs the following operations: A1. When the four-mode train tail locomotive device has not established a connection with the train tail host, first, the four-mode train tail locomotive device determines whether the LTE-R network is registered.

[0025] A2. If the LTE-R network is not registered, the digital / analog channel machine sends a 400M digital connection establishment command to the host at the end of the column, and then determines whether a connection is established with the host at the end of the column; if it is determined that a connection has been established with the host at the end of the column, it enters the working state of the 400M digital / 400K working command.

[0026] A3. If after 3 seconds, it is determined that no connection is established with the host at the end of the column, a 400M simulation connection establishment instruction is sent to the host at the end of the column again; then it is determined again whether a connection is established with the host at the end of the column. If it is determined that a connection is established with the host at the end of the column, the working state of the 400M simulation / 400K working instruction is entered, otherwise, it returns to step A1.

[0027] A4. If the four-mode train tail locomotive determines that the LTE-R network has been registered, the LTE-R communication module sends an LTE-R connection establishment instruction to the train tail host; then it determines whether a connection is established with the train tail host. If it is determined that a connection is established with the train tail host, it enters the working state of the LTE-R / 400K working instruction, otherwise it returns to step A1.

[0028] A5, 400M digital communication module sends 400M digital connection establishment instruction to the host at the end of the column; then determines whether the connection with the host at the end of the column is established. If it is determined that the connection with the host at the end of the column has been established, it enters the working state of 400K / 400M digital / LTE-R working instruction.

[0029] A6. If after 3 seconds, it is determined that no connection is established with the host at the end of the column, a 400M simulation connection establishment instruction is sent to the host at the end of the column again; then it is determined again whether a connection is established with the host at the end of the column. If it is determined that a connection is established with the host at the end of the column, the working state of the 400M simulation / 400K / LTE-R working instruction is entered, otherwise, it returns to step A1.

[0030] The implementation method of the four-mode tail locomotive platform device has the following characteristics: 1. Channel scanning and connection establishment: When the locomotive at the end of the train has not established a connection with the host at the end of the train, the control unit controls the digital / analog channel machine module to perform a 3s channel frequency scan and send a connection establishment command. When the host at the end of the train returns a connection response command, the control unit locks the frequency point to complete the connection establishment.

[0031] 2. Multi-mode communication coordination: In the segment attached to the LTE-R network, the control unit simultaneously sends connection establishment instructions through the digital / analog channel machine module and the LTE-R communication module, and determines the final communication mode based on the response instructions returned by the host at the end of the column.

[0032] 3. Data fusion and priority processing: The control unit implements the fusion of multi-mode communication data and the command priority processing mechanism through the 400K wireless communication module, digital / analog channel machine module and LTE-R communication module. When receiving the same response command in different modes, the system will give priority to displaying the command result received first to improve response efficiency.

[0033] 4. Disconnection and frequency lock mechanism clearing: When the locomotive at the end of the train is disconnected or the host at the end of the train is cancelled, the control unit clears the frequency lock mechanism and re-enters the channel scanning mode to ensure dynamic management and switching of the communication link.

Claims

1. A four-mode train tail locomotive platform device, characterized in that: It includes a power supply unit for providing stable power support for the four-mode locomotive platform device at the end of the train, a 400K wireless communication module for realizing data transmission in the railway 400K dedicated wireless communication frequency band, a digital / analog channel machine module for realizing communication conversion and signal transmission between analog channels and digital channels, and a control unit for fusion, protocol conversion and status management of multi-mode communication data of the four-mode locomotive platform device at the end of the train; The control unit includes a single-chip microcomputer of model RT1021, a memory chip, a clock chip, a CPLD chip, a serial port expansion circuit, a protocol conversion circuit 1 of model MAX202E, a protocol conversion circuit 2 of model MAX490E, a channel machine communication interface, a 400K communication interface and a power conversion circuit; the single-chip microcomputer is respectively connected to the memory chip, the clock chip, the CPLD chip, the serial port expansion circuit, the 400K communication interface, and the protocol conversion circuit 2, wherein the CPLD chip is connected to the channel machine communication interface, the serial port expansion circuit is respectively connected to the channel machine communication interface and the protocol conversion circuit 1, the channel machine communication interface is connected to the digital / analog channel machine module, and the 400K communication interface is connected to the 400K wireless communication module; The power supply unit is connected to the digital / analog channel machine module and the power conversion circuit respectively; The four-mode train tail locomotive device is connected to the LTE-R communication module of the wireless dispatch communication vehicle through a data interface; The four-mode train tail locomotive device is wirelessly connected to the train tail host.

2. A method for implementing the four-mode tail locomotive platform device as claimed in claim 1, characterized in that: The implementation method is to include a workflow for the four-mode tail locomotive platform device, which performs the following operations: A1. When the four-mode train tail locomotive device has not established a connection with the train tail host, first, the four-mode train tail locomotive device determines whether the LTE-R network is registered; A2. If the LTE-R network is not registered, the digital / analog channel machine sends a 400M digital connection establishment command to the host at the end of the train, and then determines whether a connection is established with the host at the end of the train; if it is determined that a connection has been established with the host at the end of the train, the working state of the 400M digital / 400K working command is entered; A3. If after 3 seconds, it is determined that the connection with the host at the end of the train is not established, a 400M simulation connection establishment instruction is sent to the host at the end of the train again; Then it is determined again whether a connection is established with the host at the end of the column. If it is determined that a connection is established with the host at the end of the column, the working state of the 400M simulation / 400K working instruction is entered, otherwise it returns to step A1; A4. If the four-mode train tail locomotive determines that the LTE-R network has been registered, the LTE-R communication module sends an LTE-R connection establishment instruction to the train tail host; then it determines whether a connection is established with the train tail host. If it is determined that a connection is established with the train tail host, it enters the working state of the LTE-R / 400K working instruction, otherwise it returns to step A1; A5, 400M digital communication module sends 400M digital connection establishment instruction to the host at the end of the train; then determines whether the connection with the host at the end of the train is established. If it is determined that the connection with the host at the end of the train is established, it enters the working state of 400K / 400M digital / LTE-R working instruction; A6. If after 3 seconds, it is determined that the connection with the host at the end of the train has not been established, a 400M simulation connection establishment instruction is sent to the host at the end of the train again; Then determine again whether a connection is established with the host at the end of the column. If it is determined that a connection has been established with the host at the end of the column, enter the working state of the 400M simulation / 400K / LTE-R working instruction, otherwise return to step A1.

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