Train operation monitoring information transmission system

Abstract

The invention provides a train operation monitoring information transmission system, and aims to solve the problems of overweight bus load, uncertainty of bus equipment transmitting and receiving opportunities and the like. A communication recording unit is provided with mutually independent data forwarding interfaces; each data forwarding interface is in independent communication connection with each functional plug-in which needs to obtain the data of the LKJ train operation monitoring system; the communication recording unit is composed of a plurality of communication recording modules which are in communication interaction through a CAN bus, and further comprises a main and standby machine switching module which is used for recording fault information of the communication recording modules. When one communication recording module fails, the host and standby switching module randomly switches to any of the other communication recording modules, records fault information of the communication recording modules, and issues the fault information of the communication recording modules; the communication recording unit further comprises an authentication module for performing identification and identity verification on each functional plug-in; when the functional plug-ins need to acquire data of the LKJ train operation monitoring system, the authentication module is in butt joint with the functional plug-ins requesting to be accessed for judgment, the judgment includes identity recognition, authentication judgment on the requests passing the identity recognition, and after the authentication is passed, the communication recording plug-in unit sends LKJ operation information to the functional plug-ins passing the authentication; and if the functional plug-ins which do not pass the identity recognition or authentication, refusing to access and forward the LKJ operation information.

Description

Technical Field

[0001] The invention belongs to the field of train operation monitoring, and in particular relates to a train operation monitoring information transmission system. Background Art

[0002] At present, the LKJ information forwarding platform adopts a single RS485 communication method to realize the aggregation and distribution of LKJ data. However, with the continuous improvement and expansion of field applications, a wide variety of new plug-ins (such as video plug-ins, test vehicle plug-ins) and disordered connection of external devices have caused varying degrees of impact on the external communication network of the LKJ information forwarding platform. Problems such as excessive bus load and uncertainty in the timing of bus device transmission and reception have become increasingly prominent, and even worse, have led to abnormal bus communication. In addition, the large number of equipment manufacturers has brought many inconveniences to problem investigation, which is contrary to the original design intention of the LKJ information sharing platform.

[0003] At present, the LKJ information forwarding platform adopts RS485 multi-node communication, which is susceptible to interference from various nodes such as function expansion plug-ins or peripheral devices. Once a node fails and causes congestion, or the quality of the communication bus is affected due to improper use, it will cause transmission frame loss or frame error. In addition, there is a lack of third-party device access authentication mechanism. Each business unit or manufacturer directly bypasses the electricity department to obtain data from the LKJ information forwarding platform, resulting in confusion in product management and application. Summary of the invention

[0004] In view of the problems existing in realizing the aggregation and distribution of LKJ data by the above-mentioned single RS485 communication mode, the present invention provides a train operation monitoring information transmission system, aiming to solve the problems such as excessive bus load and uncertainty of the receiving and sending timing of bus devices.

[0005] The technical solution is to include a communication recording unit that is connected to the LKJ train operation monitoring system and obtains data, wherein the communication recording unit is provided with mutually independent data forwarding interfaces, and each data forwarding interface is independently connected to each functional plug-in that needs to obtain data of the LKJ train operation monitoring system;

[0006] The communication recording unit is composed of a plurality of communication recording modules that communicate and interact via a CAN bus. The communication recording unit also includes a master-slave switching module, which is used to record the fault information of each communication recording module. When a communication recording module fails, the master-slave switching module randomly switches to any other communication recording module and records the fault information of the communication recording module, and publishes the fault information of the communication recording module.

[0007] The communication recording unit also includes an authentication module for identifying and authenticating each functional plug-in;

[0008] When the function plug-in needs to obtain the data of the LKJ train operation monitoring system, the authentication module connects to the function plug-in requesting access to make a judgment, which includes identity recognition, and authenticates the request through identity recognition. After authentication, the communication record plug-in unit sends LKJ operation information to the authenticated function plug-in;

[0009] Functional plug-ins that fail to pass identity recognition or authentication will be denied access and forwarding of LKJ operation information.

[0010] In the above or some embodiments, the communication recording unit is connected to the locomotive power supply by a power supply unit, and the power supply unit at least includes a redundant power plug-in A and a power plug-in B. The power plug-in A and the power plug-in B form a built-in power fusion circuit to supply power to each communication recording module and each functional plug-in.

[0011] In the above or some embodiments, the communication recording unit is also connected to an external device through an independent communication channel, and the external device includes a display for displaying each functional plug-in or the specified information of the LKJ train operation monitoring system, and a voice player for playing each functional plug-in or the specified information of the LKJ train operation monitoring system.

[0012] In the above or some embodiments, the authentication module adopts a 128-bit AES-ECB algorithm to configure an identification code for identity identification for a legal function plug-in, and the identification code is stored in the authentication module or a storage module in the communication recording unit; the communication recording unit sends heartbeat information to the function plug-in with a period of 500ms; after receiving the heartbeat, each function plug-in initiates an access application to the communication recording plug-in, and the authentication module determines the legitimacy of the function plug-in according to the identification code of each function plug-in, and replies with a legal access response to complete the subsequent authentication process; if it is illegal, it replies with a denial of access; after completing the authentication, the communication recording plug-in sends LKJ operation information to the function plug-in and processes the response information of the function plug-in.

[0013] Compared with the traditional solution, the present invention is based on the existing on-board equipment environment. By adding a train operation monitoring information transmission device, each specific function plug-in must first undergo secure access authentication before communication can be achieved, and train operation monitoring information can be obtained from LKJ. After the obtained information is reorganized, it is periodically forwarded to the specific functional unit.

[0014] Instruction Manual

[0015] Figure 1 It is a schematic diagram of the implementation principle of the present invention.

[0016] Figure 2 This is a hardware architecture diagram of the present invention. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of the present invention, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0019] The communication recording unit is connected to the LKJ train operation monitoring system for communication and data acquisition. The communication recording unit is composed of multiple communication recording modules that interact through CAN bus communication. The communication recording unit also includes a master-standby switching module. The master-standby switching module is used to record the fault information of each communication recording module. When a communication recording module fails, the master-standby switching module randomly switches to any other communication recording module and records the fault information of the communication recording module, and publishes the fault information of the communication recording module.

[0020] In the above or some embodiments, there are two communication recording modules and they are mutually redundant. The communication recording modules communicate and interact with each other via the CAN bus. Each communication recording module includes an MCU main controller, and the MCU main controller is provided with an RS485 communication interface for communicating with each functional plug-in, such as Figure 2 As shown. The MCU main controller uses GigaDevice GD32F427ZGT6, which provides 3 CAN channels, 12 RS485 channels, 1 USB channel, more convenient application expansion, and 8G external storage space. The MCU main controller also sets a USB interface through a USB interface circuit, and the MCU main controller is also connected to a memory for communication.

[0021] In the above or some embodiments, the functional plug-in includes a track detection plug-in, a bow net detection plug-in, a TMIS plug-in, a DMIS plug-in, a voice recording plug-in, etc. The communication recording module can be connected to the LKJ15 expansion unit through two redundant CAN interfaces to receive the train number, driver number, time and other operating information of LKJ15; it can also be connected to the LKJ2000 host through the RS485 interface to receive the train number, driver number, time and other operating information of LKJ2000. Each functional plug-in is directly connected to the MCU main controller through the corresponding RS485 communication interface to form an independent communication channel.

[0022] The authentication module and the communication recording unit also include an authentication module for identifying and authenticating each functional plug-in. In the above or some embodiments, the authentication module adopts the AES-ECB algorithm with a length of 128 bits, and configures an identification code for identity identification for the legal functional plug-in, and the identification code is stored in the authentication module or the storage module in the communication recording unit; the communication recording unit sends heartbeat information to the functional plug-in in a 500ms cycle; each functional plug-in initiates an access application to the communication recording plug-in after receiving the heartbeat, and the authentication module determines the legality of the functional plug-in according to the identification code of each functional plug-in, and replies to the access application response legally to complete the subsequent authentication process; if it is illegal, it replies to deny access; after completing the authentication, the communication recording plug-in sends LKJ operation information to the functional plug-in and processes the response information of the functional plug-in.

[0023] Power supply unit, in the above or some embodiments, the communication recording unit is connected to the locomotive power supply by the power supply unit, and the power supply unit at least includes a redundant power supply plug-in A and a power supply plug-in B, and the power supply plug-in A and the power supply plug-in B form a power supply including each communication recording module and each functional plug-in through a built-in power fusion circuit. The dual power supplies should be in a state of working at the same time, supporting current-balanced power supply. When a certain or all output power supplies of a certain power supply unit fail, the corresponding power output is cut off, and the other power supply unit supplies power separately.

[0024] External device. In the above or some embodiments, the communication recording unit is also connected to the external device through an independent communication channel. The external device includes a display for displaying each functional plug-in or the specified information of the LKJ train operation monitoring system, and a voice player for playing each functional plug-in or the specified information of the LKJ train operation monitoring system.

[0025] Compared with the traditional solution, the present invention is based on the existing on-board equipment environment. By adding a train operation monitoring information transmission device, each specific function plug-in must first undergo secure access authentication before communication can be achieved, and train operation monitoring information can be obtained from LKJ. After the obtained information is reorganized, it is periodically forwarded to the specific functional unit.

Claims

1. A train operation monitoring information transmission system, including a communication recording unit that is connected to the LKJ train operation monitoring system and obtains data. The communication recording unit is provided with mutually independent data forwarding interfaces, and each data forwarding interface is independently connected to each functional plug-in that needs to obtain LKJ train operation monitoring system data; The communication recording unit is composed of a plurality of communication recording modules that communicate and interact via a CAN bus. The communication recording unit also includes a master-slave switching module, which is used to record the fault information of each communication recording module. When a communication recording module fails, the master-slave switching module randomly switches to any other communication recording module and records the communication recording module information, and publishes the communication recording module fault information. The communication recording unit also includes an authentication module for identifying and authenticating each functional plug-in; When the function plug-in needs to obtain the data of the LKJ train operation monitoring system, the authentication module connects to the function plug-in requesting access to make a judgment, which includes identity recognition, and authenticates the request through identity recognition. After authentication, the communication record plug-in unit sends LKJ operation information to the authenticated function plug-in; Functional plug-ins that fail to pass identity recognition or authentication will be denied access and forwarding of LKJ operation information.

2. The train operation monitoring information transmission system according to claim 1, characterized in that: The communication recording unit is connected to the locomotive power supply by a power supply unit, and the power supply unit at least includes a redundant power supply plug-in A and a power supply plug-in B. The power supply plug-in A and the power supply plug-in B form a power supply including each communication recording module and each functional plug-in through a built-in power fusion circuit.

3. The train operation monitoring information transmission system according to claim 1, characterized in that: The communication recording unit is also connected to an external device through an independent communication channel, and the external device includes a display for displaying each functional plug-in or the specified information of the LKJ train operation monitoring system, and a voice player for playing each functional plug-in or the specified information of the LKJ train operation monitoring system.

4. The train operation monitoring information transmission system according to claim 1, characterized in that: The authentication module adopts the 128-bit AES-ECB algorithm to configure an identification code for identity identification for a legitimate function plug-in, and the identification code is stored in the authentication module or the storage module in the communication recording unit; the communication recording unit sends heartbeat information to the function plug-in at a period of 500ms; each function plug-in initiates an access application to the communication recording plug-in after receiving the heartbeat, and the authentication module determines the legitimacy of the function plug-in according to the identification code of each function plug-in, and replies to the access application response legally to complete the subsequent authentication process; if it is illegal, it replies to deny access; After completing the authentication, the communication record plug-in sends LKJ operation information to the function plug-in and processes the response information of the function plug-in.

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