WO2023015744A1

WO2023015744A1 - Data transmission system and railway vehicle

Info

Publication number: WO2023015744A1
Application number: PCT/CN2021/128359
Authority: WO
Inventors: 刘国梁; 马晓明; 韩俊峰; 赵慧; 邢璐璐
Original assignee: 中车长春轨道客车股份有限公司
Priority date: 2021-08-09
Filing date: 2021-11-03
Publication date: 2023-02-16
Also published as: CN216013977U

Abstract

Disclosed is a data transmission system (100), comprising: a first data transmission apparatus (102) located in a second traction unit (106), a second data transmission apparatus (104) located in a fourth traction unit (108), a first wireless transmission apparatus (101) located in a first traction unit (105), and a second wireless transmission apparatus (103) located in a third traction unit (107). The first data transmission apparatus (102) and the second data transmission apparatus (104) each comprise a power board card, a CPU board card, and a TRDP board card; the first data transmission apparatus (102) transmits vehicle-mounted data of the second traction unit (106) to the first wireless transmission apparatus (101) by means of an Ethernet switch; the first wireless transmission apparatus (101) transmits vehicle-mounted data of the first traction unit (105) and the vehicle-mounted data of the second traction unit (106) to a ground server (109); the second data transmission apparatus (104) transmits vehicle-mounted data of the fourth traction unit (108) to the second wireless transmission apparatus (103) by means of the Ethernet switch; the second wireless transmission apparatus (103) transmits vehicle-mounted data of the third traction unit (107) and the vehicle-mounted data of the fourth traction unit (108) to the ground server (109).

Description

A data transmission system and rail vehicle

This application claims the priority of a Chinese patent application with application number 202121852586.6 and application title "A Data Transmission System and Rail Vehicle" submitted to the State Intellectual Property Office on August 09, 2021, the entire contents of which are incorporated herein by reference Applying.

technical field

The present application relates to the technical field of vehicles, in particular to a data transmission system and a rail vehicle.

Background technique

As the scale of the railway network expands year by year, the mileage of high-speed railways is getting longer and longer, and the long-distance and large-capacity long-scheduled EMUs have emerged as the times require. In order to facilitate the emergency command of the long-arranged EMU by the ground command center, the long-arranged EMU will use commercial communication technology (such as the 4th generation communication system (the 4th generation communication system, 4G) or the 5th generation communication system (the 5th generation communication system). system, 5G)) will return the vehicle data to the ground command center.

Generally, a long-braided EMU consists of 4 traction units, and each traction unit includes 4 carriages. Each traction unit will be equipped with a wireless transmission device, that is, a long MU needs to be equipped with at least 4 wireless transmission devices. Each traction unit transmits the vehicle-mounted data corresponding to each traction unit to the ground command center through its own wireless transmission device.

The wireless transmission device includes a power board, a central processing unit (CPU) board, a train real-time data protocol (TRDP) board, and a parallel transfer unit (PTU) board and wireless communication boards. The PTU board and wireless communication board of the wireless transmission device need to be integrated in a 3U chassis, which is a kind of cabinet for storing servers, where "U" refers to the height and width of the chassis. Due to the longer length of the PTU board and wireless communication board, the length of the 3U chassis will be longer, and the 3U chassis will occupy a larger space, especially when each traction unit needs to be equipped with a wireless transmission device. , the length of the 3U chassis corresponding to each traction unit will be longer, which will increase the load of each traction unit.

Contents of the invention

The application provides a data transmission system and a rail vehicle capable of reducing the load of a part of the traction unit.

In a first aspect, the present application provides a data transmission system, which is applied to a rail vehicle, and the rail vehicle includes at least four traction units, and the data transmission system includes: a first data transmission device, a second data transmission device, a a wireless transmission device and a second wireless transmission device;

Both the first data transmission device and the second data transmission device include a power supply board, a central processing unit CPU board and a train real-time data protocol TRDP board;

The first wireless transmission device is located in the first traction unit, the first data transmission device is located in the second traction unit, the second wireless transmission device is located in the third traction unit, and the second data transmission device is located in the fourth traction unit unit;

The first data transmission device is used to transmit the vehicle-mounted data of the second traction unit to the first wireless transmission device through an Ethernet switch;

The first wireless transmission device is used to transmit the vehicle-mounted data of the first traction unit and the vehicle-mounted data of the second traction unit to a ground server;

The second data transmission device is used to transmit the vehicle-mounted data of the fourth traction unit to the second wireless transmission device through an Ethernet switch;

The second wireless transmission device is used to transmit the vehicle data of the third traction unit and the vehicle data of the fourth traction unit to the ground server.

As a possible implementation, the first wireless transmission device is also used to transmit the on-vehicle data of the first traction unit and the on-vehicle data of the second traction unit to the second wireless transmission device;

The second wireless transmission device is also used to transmit the vehicle-mounted data of the third traction unit and the vehicle-mounted data of the second traction unit to the first wireless transmission device through an Ethernet switch;

The first wireless transmission device is specifically used to transmit the vehicle-mounted data of the first traction unit, the vehicle-mounted data of the second traction unit, the vehicle-mounted data of the third traction unit, and the vehicle-mounted data of the fourth traction unit transmit to said ground server;

The second wireless transmission device is specifically used to transfer the vehicle-mounted data of the first traction unit, the vehicle-mounted data of the second traction unit, the vehicle-mounted data of the third traction unit, and the vehicle-mounted data of the fourth traction unit transmitted to the ground server.

As a possible implementation manner, the first wireless transmission device and the second wireless transmission device perform time correction according to a time signal of a master control vehicle of the rail vehicle.

As a possible implementation, after the ground server receives the on-board data sent by the first wireless transmission device and the on-board data sent by the second wireless transmission device, the on-board data sent by the first wireless transmission device Or analyze the vehicle-mounted data sent by the second wireless transmission device.

As a possible implementation, when the first wireless transmission device fails, the ground server only analyzes the vehicle data sent by the second wireless transmission device;

or,

When the second wireless transmission device fails, the ground server only analyzes the vehicle data sent by the first wireless transmission device.

As a possible implementation, the data between the first wireless transmission device, the second wireless transmission device, the first data transmission device and the second data transmission device is carried out through an Ethernet switch using the TRDP protocol. interact.

In a second aspect, the present application provides a rail vehicle, which includes the data transmission system described in any one of the above first aspects.

It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

In this application, the two traction units are divided into one group, and each group of traction units is equipped with a wireless transmission device and a data transmission device, and the data transmission device transmits the on-board data of the traction unit where it is located to the wireless transmission device, and the wireless transmission device The on-board data of the traction unit where it is located and the on-board data transmitted by the data transmission device are transmitted to the ground server. In this way, in the case of a long motor vehicle including four or more traction units, the number of wireless transmission devices used is reduced exponentially, and the data transmission device includes power supply boards, CPU boards and TRDP boards. The 3U chassis corresponding to the data transmission device does not need to be further installed with PTU boards, nor does it need to install wireless communication boards, which will shorten the length of the 3U chassis, reduce the load of part of the traction unit, and thus reduce the overall load of the long-braided motor car.

Specifically, the data transmission system includes a first wireless transmission device, a second wireless transmission device, a first data transmission device and a second data transmission device, wherein the first wireless transmission device is located in the first traction unit, the second wireless transmission device The device is located in the third traction unit, the first data transmission device is located in the second traction unit, and the second data transmission device is located in the fourth traction unit. Compared with the traditional scheme, after the original wireless transmission device on the second traction unit is replaced by the first data transmission device, the load on the second traction unit can be reduced, and the second data transmission device replaces the original wireless transmission device on the fourth traction unit. After the transmission device, the load of the fourth traction unit can be reduced. Then, the first data transmission device transmits the vehicle-mounted data of the second traction unit to the first wireless transmission device through the Ethernet switch, so that the first wireless transmission device transmits the vehicle-mounted data to the ground server; similarly, the second data transmission The device transmits the vehicle-mounted data of the fourth traction unit to the second wireless transmission device through the Ethernet switch, so that the second wireless transmission device transmits the vehicle-mounted data to the ground server.

In this way, the wireless transmission system can also transmit the on-board data of all the traction units on the rail vehicle to the ground server under the condition of low cost and low load of the rail vehicle.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1 is a schematic diagram of a data transmission system provided by an embodiment of the present application;

FIG. 2A is a schematic diagram of vehicle-mounted data acquisition provided by an embodiment of the present application;

Fig. 2B is a schematic diagram of vehicle-mounted data acquisition provided by the embodiment of the present application;

FIG. 2C is a schematic diagram of vehicle-mounted data acquisition provided by the embodiment of the present application;

FIG. 2D is a schematic diagram of vehicle-mounted data acquisition provided by the embodiment of the present application;

FIG. 3 is a schematic diagram of a redundant backup provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a redundant backup provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a vehicle-mounted data transmission provided by an embodiment of the present application;

FIG. 6A is a schematic structural diagram of a wireless transmission device provided by an embodiment of the present application;

FIG. 6B is a schematic structural diagram of a data transmission device provided by an embodiment of the present application.

Detailed ways

The solutions in the embodiments provided in the present application will be described below with reference to the drawings in the present application.

The terms "first" and "second" in the embodiments of the present application are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features.

With the development of the economy, the scale of the railway network is expanding year by year, and the mileage of the high-speed railway is getting longer and longer. In order to meet the long-distance and large-capacity transportation needs and further improve the passenger capacity of the busy main line EMU trains, and expand the transportation capacity requirements, the research and development Long EMUs (more than 16 cars). The network control system, one of the core systems of long-run EMUs, uses TCN network empty vehicles. In order to facilitate the application of large data on the ground and emergency command, the vehicle data is transmitted to the ground command center through wireless transmission technology.

Generally, each migration unit is equipped with a wireless transmission device. For example, the above-mentioned long train consists of 16 cars, and every four adjacent cars form a traction unit. The PTU board and wireless communication board of the wireless transmission device need to be integrated in a 3U chassis. Due to the long length of the PTU board and wireless communication board, the length of the 3U chassis will be longer, and the 3U chassis will occupy a large area. Space, especially when each traction unit needs to be equipped with a wireless transmission device, the length of the 3U chassis corresponding to each traction unit will be longer, which will increase the load of each traction unit.

In view of this, in this application, the two traction units are divided into one group, and each group of traction units is equipped with a wireless transmission device and a data transmission device, and the data transmission device transmits the on-board data of the traction unit where it is located to the wireless transmission device , the wireless transmission device transmits the vehicle-mounted data of the traction unit where it is located and the vehicle-mounted data transmitted by the data transmission device to the ground server. In this way, in the case of a long motor vehicle including four or more traction units, the number of wireless transmission devices used is reduced exponentially, and the data transmission device includes power supply boards, CPU boards and TRDP boards. The 3U chassis corresponding to the data transmission device does not need to be further installed with PTU boards, nor does it need to install wireless communication boards, which will shorten the length of the 3U chassis, reduce the load of part of the traction unit, and reduce the load of the long-braided car as a whole .

In order to make the technical solution of the present application clearer and easier to understand, the data transmission system provided by the embodiment of the present application will be introduced below by taking a long train set including 16 cars as an example.

Referring to FIG. 1 , the figure is a schematic diagram of a data transmission system provided by an embodiment of the present application.

The data transmission system 100 provided by the embodiment of the present application includes a first wireless transmission device 101, a second wireless transmission device 103, a first data transmission device 102 and a second data transmission device 104, wherein the first wireless transmission device 101 is located at the A traction unit 105 , the second wireless transmission device 103 are located in the third traction unit 107 , the first data transmission device 102 is located in the second traction unit 106 , and the second data transmission device 104 is located in the fourth traction unit 108 . Compared with the traditional scheme, after replacing the original wireless transmission device on the second traction unit 106 with the first data transmission device 102, the load of the second traction unit 106 can be reduced, and the second data transmission device 104 replaces the fourth traction unit After the original wireless transmission device on 108, the load of the fourth traction unit 108 can be reduced. Then, the first data transmission device 102 transmits the vehicle-mounted data of the second traction unit 106 to the first wireless transmission device 101 through an Ethernet switch, so that the first wireless transmission device 101 transmits the vehicle-mounted data to the ground server 109; similar , the second data transmission device 104 transmits the vehicle data of the fourth traction unit 108 to the second wireless transmission device 103 through the Ethernet switch, so that the second wireless transmission device 103 transmits the vehicle data to the ground server 109 .

Referring to FIG. 2A , this figure is a schematic diagram of obtaining vehicle-mounted data of a first traction unit by a first wireless transmission device according to an embodiment of the present application.

As shown, the first traction unit 105 includes a first subsystem 211 , a second subsystem 221 , a third subsystem 231 and a fourth subsystem 241 . Wherein, the first subsystem 211 may be located in car No. 1, the second subsystem 221 may be located in car No. 2, the third subsystem 231 may be located in car No. 3, and the fourth subsystem 241 may be located in car No. 4.

It should be noted that FIG. 2 is only an example of the traction unit including 4 vehicles, and the present application is not limited thereto, and those skilled in the art can make selections according to actual needs.

In some examples, the first subsystem 211 can transmit the vehicle data of car No. 1 to the first wireless transmission device 101 through the Ethernet switch 251 through the Ethernet cable. Similarly, the second subsystem 221 can transmit the vehicle-mounted data of the No. 2 car to the first wireless transmission device 101 through the Ethernet switch 251 through the Ethernet line; the third subsystem 231 can transmit the vehicle-mounted data of the No. 3 car through the Ethernet line. The Ethernet switch 251 transmits to the first wireless transmission device 101; the fourth subsystem 241 can transmit the vehicle data of car No. 4 to the first wireless transmission device 101 through the Ethernet switch 251 through the Ethernet cable.

Referring to FIG. 2B , this figure is a schematic diagram of a second wireless transmission device acquiring vehicle-mounted data of a third traction unit according to an embodiment of the present application.

As shown, the third traction unit 107 includes a first subsystem 212 , a second subsystem 222 , a third subsystem 232 and a fourth subsystem 242 . Wherein, the first subsystem 212 may be located in car No. 9, the second subsystem 222 may be located in car No. 10, the third subsystem 232 may be located in car No. 11, and the fourth subsystem 242 may be located in car No. 12.

In some examples, the first subsystem 212 can transmit the vehicle data of car No. 9 to the second wireless transmission device 103 through the Ethernet switch 252 through the Ethernet. Similarly, the second subsystem 222 can transmit the vehicle-mounted data of the No. 10 car to the second wireless transmission device 103 through the Ethernet switch 252; the third subsystem 232 can transmit the vehicle-mounted data of the No. 11 vehicle through the Ethernet. The Ethernet switch 252 transmits to the second wireless transmission device 103; the fourth subsystem 242 can transmit the vehicle data of the No. 12 car to the second wireless transmission device 103 through the Ethernet switch 252.

Referring to FIG. 2C , this figure is a schematic diagram of a first data transmission device acquiring on-board data of a second traction unit according to an embodiment of the present application.

As shown in the figure, the second traction unit 106 includes a first subsystem 213 , a second subsystem 223 , a third subsystem 233 , and a fourth subsystem 243 . Wherein, the first subsystem 213 can be located in car No. 5, the second subsystem 223 can be located in car No. 6, the third subsystem 233 can be located in car No. 7, and the fourth subsystem 243 can be located in car No. 8.

In some examples, the first subsystem 213 can transmit the vehicle data of car No. 5 to the first data transmission device 102 through the Ethernet switch 253 through Ethernet. Similarly, the second subsystem 223 can transmit the vehicle-mounted data of the No. 6 car to the first data transmission device 102 through the Ethernet switch 253 through the Ethernet; the third subsystem 233 can transmit the vehicle-mounted data of the No. 7 vehicle through the Ethernet. The Ethernet switch 253 transmits to the first data transmission device 102; the fourth subsystem 243 can transmit the on-board data of the No. 8 car to the first data transmission device 102 through the Ethernet switch 253.

Referring to FIG. 2D , this figure is a schematic diagram of the second data transmission device 104 acquiring the vehicle-mounted data of the fourth traction unit according to the embodiment of the present application.

As shown, the fourth traction unit 108 includes a first subsystem 214 , a second subsystem 224 , a third subsystem 234 , and a fourth subsystem 244 . Wherein, the first subsystem 214 may be located in car No. 13, the second subsystem 224 may be located in car No. 14, the third subsystem 234 may be located in car No. 15, and the fourth subsystem 244 may be located in car No. 16.

In some examples, the first subsystem 214 can transmit the on-board data of car No. 13 to the second data transmission device 104 through the Ethernet switch 254 . Similarly, the second subsystem 224 can transmit the vehicle-mounted data of the No. 14 car to the second data transmission device 104 through the Ethernet switch 254; the third subsystem 234 can transmit the vehicle-mounted data of the No. 15 vehicle through the Ethernet The Ethernet switch 254 transmits to the second data transmission device 104; the fourth subsystem 244 can transmit the vehicle data of car No. 16 to the second data transmission device 104 through the Ethernet switch 254.

In some embodiments, compared with other core components (central control unit, Ethernet switch) of the network control system as the medium of data transmission, the data transmission device improves the professionalism of Ethernet data processing services and reduces the CPU of innovative components. occupancy rate, while better ensuring the performance and stability of the network control system itself.

In some implementation manners, the first wireless transmission device 101 and the second wireless transmission device 103 perform redundant backup of the in-vehicle data to be transmitted respectively, which will be introduced below.

Referring to FIG. 3 , it is a schematic diagram of a redundant backup provided by the embodiment of the present application.

As shown in the figure, the first wireless transmission device 101 is also used to transmit the vehicle-mounted data of the first traction unit 105 and the vehicle-mounted data of the second traction unit 106 to the second wireless transmission device 103 through an Ethernet interactive machine; The second wireless transmission device 103 is also used to transmit the vehicle data of the third traction unit 107 and the vehicle data of the second traction unit 106 to the first wireless transmission device 101 through the Ethernet switch. For example, the Ethernet switch may be a train-level Ethernet switch.

The first wireless transmission device 101 is specifically used to transmit the vehicle-mounted data of the first traction unit 105, the vehicle-mounted data of the second traction unit 106, the vehicle-mounted data of the third traction unit 107, and the vehicle-mounted data of the fourth traction unit 108 to the ground The server 109; the second wireless transmission device 103 is specifically used to transmit the vehicle-mounted data of the first traction unit 105, the vehicle-mounted data of the second traction unit 106, the vehicle-mounted data of the third traction unit 107 and the vehicle-mounted data of the fourth traction unit 108 to ground server 109 .

In some other implementation manners, the first data transmission device and the second data transmission device may respectively send the vehicle data to the first wireless transmission device and the second wireless transmission device to implement redundant backup.

Referring to FIG. 4 , this figure is a schematic diagram of a redundant backup provided by an embodiment of the present application.

As shown in the figure, the first data transmission device 102 transmits the vehicle-mounted data of the second traction unit 106 to the first wireless transmission device 101 and the second wireless transmission device 103 through an Ethernet switch, and the second data transmission device 104 transmits the vehicle data through an Ethernet switch. The vehicle data of the fourth traction unit 108 is transmitted to the second wireless transmission device 103 and the first wireless transmission device 101 .

Next, the first wireless transmission device 101 transmits the vehicle-mounted data of the first traction unit 105 to the second wireless transmission device 103, and the second wireless transmission device 103 transmits the vehicle-mounted data of the third traction unit 107 to the first wireless transmission device 101. In this way, the redundant backup of the on-vehicle data that the first wireless transmission device 101 and the second wireless transmission device 103 need to transmit to the ground server 109 is realized.

In some embodiments, the Ethernet switch performs data interaction with the TRDP protocol. When the TRDP protocol is used for data interaction, the transmission cycle is shortened by 4 times compared with the traditional MVB protocol. In some examples, when the TRDP protocol is used for data interaction, the transmission The period is 30ms.

Referring to FIG. 5 , this figure is a schematic diagram of on-vehicle data transmission provided by an embodiment of the present application.

The first wireless transmission device 101 and the second wireless transmission device 103 can transmit the on-board data of the whole train to the ground server at the same time, and then present the on-board data of the whole train through a display terminal (such as a display screen).

In some examples, the ground server may only select the in-vehicle data transmitted by any one of the first wireless transmission device 101 and the second wireless transmission device 103 for processing, and then display it on the display terminal. For example, the ground server only selects the vehicle-mounted data transmitted by the first wireless transmission device 101 for processing, and only processes the vehicle-mounted data transmitted by the second wireless transmission device 103 when the first wireless transmission device 101 fails. In this way, the uniqueness of the data source, the synchronization of the same data and the simplification and fluency of the software architecture of the ground server are guaranteed.

In some examples, the first wireless transmission device 101 and the second wireless transmission device 103 perform time calibration according to the time signal of the master control vehicle of the rail vehicle, thus solving the problem of the first wireless transmission device 101 and the second wireless transmission device The problem that the wireless transmission device 103 transmits the in-vehicle data to the ground server is inconsistent, which is more beneficial to the consistency of the in-vehicle data.

Referring to FIGS. 6A and 6B , FIG. 6A is a schematic structural diagram of a wireless transmission device provided in an embodiment of the present application, and FIG. 6B is a schematic structural diagram of a data transmission device provided in an embodiment of the present application.

It can be seen from the figure that, compared with the wireless transmission device, the data transmission device does not need a PTU board or a wireless communication board, thereby reducing the length of the 3U chassis. This can reduce the load on part of the traction unit.

In addition, it should be noted that the device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units , which can be located in one place, or can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the device embodiments provided in the present application, the connection relationship between the units indicates that they have a communication connection, which can be specifically implemented as one or more communication buses or signal lines.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary general-purpose hardware, and of course it can also be realized by special hardware including application-specific integrated circuits, dedicated CPUs, dedicated memories, Special components, etc. to achieve. In general, all functions completed by computer programs can be easily realized by corresponding hardware, and the specific hardware structure used to realize the same function can also be varied, such as analog circuits, digital circuits or special-purpose circuit etc.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, all or part of the functions described in the embodiments of the present application will be generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transferred from a website, computer, training device, or data The center transmits to another website site, computer, training device or data center via wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be stored by a computer, or a data storage device such as a training device or a data center integrated with one or more available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (Solid State Disk, SSD)), etc.

The embodiments and/or implementations described above are only used to illustrate the preferred embodiments and/or implementations of the technology of the present application, and are not intended to limit the implementation of the technology of the application in any form. Personnel, without departing from the scope of the technical means disclosed in this application, may make some changes or modifications to other equivalent embodiments, but it should still be regarded as the technology or embodiment substantially the same as this application.

Claims

A data transmission system, characterized in that it is applied to a rail vehicle, the rail vehicle includes at least 4 traction units, and the data transmission system includes: a first data transmission device, a second data transmission device, a first wireless transmission device and a second wireless transmission device;

Both the first data transmission device and the second data transmission device include a power supply board, a central processing unit CPU board and a train real-time data protocol TRDP board;

The first wireless transmission device is located in the first traction unit, the first data transmission device is located in the second traction unit, the second wireless transmission device is located in the third traction unit, and the second data transmission device is located in the fourth traction unit unit;

The first data transmission device is used to transmit the vehicle-mounted data of the second traction unit to the first wireless transmission device through an Ethernet switch;

The first wireless transmission device is used to transmit the vehicle-mounted data of the first traction unit and the vehicle-mounted data of the second traction unit to a ground server;

The second data transmission device is used to transmit the vehicle-mounted data of the fourth traction unit to the second wireless transmission device through an Ethernet switch;

The second wireless transmission device is used to transmit the vehicle-mounted data of the third traction unit and the vehicle-mounted data of the fourth traction unit to the ground server.
The system according to claim 1, wherein the first wireless transmission device is also used to transmit the vehicle-mounted data of the first traction unit and the vehicle-mounted data of the second traction unit to the the second wireless transmission device;

The second wireless transmission device is also used to transmit the vehicle-mounted data of the third traction unit and the vehicle-mounted data of the second traction unit to the first wireless transmission device through an Ethernet switch;

The first wireless transmission device is specifically used to transmit the vehicle-mounted data of the first traction unit, the vehicle-mounted data of the second traction unit, the vehicle-mounted data of the third traction unit, and the vehicle-mounted data of the fourth traction unit transmit to said ground server;

The second wireless transmission device is specifically used to transfer the vehicle-mounted data of the first traction unit, the vehicle-mounted data of the second traction unit, the vehicle-mounted data of the third traction unit, and the vehicle-mounted data of the fourth traction unit transmitted to the ground server.
The system according to claim 1, wherein the first wireless transmission device and the second wireless transmission device perform time correction according to the time signal of the master control vehicle of the rail vehicle.
The system according to claim 1, wherein after the ground server receives the vehicle-mounted data sent by the first wireless transmission device and the vehicle-mounted data sent by the second wireless transmission device, The on-board data sent by the device or the on-board data sent by the second wireless transmission device are analyzed.
The system according to claim 4, wherein when the first wireless transmission device fails, the ground server only analyzes the vehicle data sent by the second wireless transmission device;

or,

When the second wireless transmission device fails, the ground server only analyzes the vehicle data sent by the first wireless transmission device.
The system according to any one of claims 1-5, wherein the first wireless transmission device, the second wireless transmission device, the first data transmission device, and the second data transmission device Data exchange is carried out through the Ethernet switch through the TRDP protocol.
A rail vehicle, characterized by comprising the data transmission system according to any one of claims 1-6.