WO2024050990A1

WO2024050990A1 - Data transmission system and method for multiple unit, and multiple unit

Info

Publication number: WO2024050990A1
Application number: PCT/CN2022/134606
Authority: WO
Inventors: 王华伟; 韩俊峰; 刘国梁; 李超
Original assignee: 中车长春轨道客车股份有限公司
Priority date: 2022-09-07
Filing date: 2022-11-28
Publication date: 2024-03-14
Also published as: CN115580631A

Abstract

The present application provides a data transmission system and method for a multiple unit, and a multiple unit. The system comprises an ethernet train backbone node (ETBN), a photoelectric conversion module and an optical lens; the ETBN is located at a head car of a multiple unit, and can convert car-level data transmitted inside the multiple unit into train-level data transmitted among different multiple units; the photoelectric conversion module is located at a coupler of the multiple unit, can receive by means of an ethernet cable the train-level data forwarded by the ETBN, and can convert the train-level data from an ethernet signal into an optical signal, the coupler referring to a device located at an end portion of the multiple unit and used for coupling two multiple units; the optical lens is located between two photoelectric conversion modules corresponding to two multiple units; when the two multiple units are coupled, the optical lens can mutually transmit optical signal data corresponding to the two multiple units. While not causing a backflow current, the system can realize stable data transmission for coupled multiple units by means of optical communication.

Description

A data transmission system for EMU, EMU and method

This application requires priority to be submitted to the China Patent Office on September 7, 2022, with the application number 202211090998. This reference is incorporated into this application.

Technical field

This application relates to the technical field of EMUs, and specifically to a data transmission system for EMUs, EMUs and methods.

Background technique

With the rapid development of science and technology and the update and iteration of transportation, people now often choose EMUs as a means of transportation for long distances. EMU, also known as EMU train, refers to a means of transportation consisting of multiple vehicles running on a high-speed railway.

Since EMUs often require multiple EMUs to be reconnected in actual driving to adapt to scenarios with more users, EMU reconnection refers to running two EMUs through a reconnected coupler. The forward direction of the operation is determined by the first One EMU is responsible for the control. After the EMU trains are reconnected, the original one EMU can be transformed into two EMUs, doubling the transport capacity.

After the EMUs are reconnected, Ethernet cables are mainly used in related technologies for data transmission between the two EMUs. Since the electric potentials of the two EMU train bodies will be different after the EMU is reconnected, in order to prevent the formation of backflow current by connecting the two EMU train bodies with different potentials after the reconnection, the shielding layer of the Ethernet cable after the reconnection should be It is discontinuous at the reconnection coupler. However, since the data transmitted by reconnection is train-level data and the amount of data is relatively large, Gigabit Ethernet cables need to be used, and the shielding of Gigabit Ethernet cables will be significantly reduced if they are discontinuous. The quality of communication, so how to achieve stable data transmission after EMU reconnection without forming backflow current is an urgent problem that needs to be solved.

Contents of the invention

In view of this, embodiments of the present application provide a data transmission system, an EMU, and a method for EMUs, which can achieve stable data transmission without forming a backflow current after the EMUs are reconnected.

The first aspect of the embodiments of this application provides a data transmission system for EMUs. The system includes: a train backbone Ethernet node ETBN, a photoelectric conversion module and an optical lens;

The ETBN is located at the head car of the EMU. The ETBN is used to convert the vehicle-level data transmitted by the EMU into train-level data. The EMU includes two head cars located at the end and multiple Intermediate car, the vehicle-level data is used to represent data transmitted within the EMU, and the train-level data is used to represent data transmitted between different EMUs;

The photoelectric conversion module is located at the reconnect coupler of the EMU and uses an Ethernet cable to transmit the train-level data of the EMU with the ETBN. The photoelectric conversion module is used to convert the train-level data from The Ethernet signal is converted into an optical signal, and the reconnection coupler is located at the end of the EMU for coupling two EMUs;

The optical lens is located between the two corresponding photoelectric conversion modules of the two EMUs. The optical lens is used to transmit the corresponding optical signal data of the two EMUs to each other when the two EMUs are reconnected. , to realize data transmission between the different EMUs.

The second aspect of the embodiment of the present application provides an EMU, including the data transmission system for the EMU described in the above system embodiment.

The third aspect of the embodiment of the present application is a data transmission method for EMUs, applied to a data transmission system including a train backbone Ethernet node ETBN, a photoelectric conversion module and an optical lens. The method includes:

The ETBN converts the vehicle-level data transmitted by the EMU into train-level data. The ETBN is located at the head car of the EMU. The EMU includes two head cars located at the end and multiple intermediate cars. , the vehicle-level data is used to represent data transmitted within the EMU, and the train-level data is used to represent data transmitted between different EMUs;

The photoelectric conversion module converts the train-level data from Ethernet signals into optical signals. The photoelectric conversion module is located at the reconnect coupler of the EMU and uses an Ethernet cable to transmit the EMU with the ETBN. The train level data of the group, the reconnection coupler is located at the end of the EMU and is used to couple two EMUs;

The optical lens transmits the optical signal data corresponding to the two EMUs to each other when the two EMUs are reconnected to realize data transmission between the different EMUs. The optical lens is located on the two EMUs. Between the two photoelectric conversion modules corresponding to the EMU.

To sum up, the embodiments of the present application provide a data transmission system, EMU and method for EMUs. The system includes a train backbone Ethernet node (ethernet train backbone node, ETBN), a photoelectric conversion module and an optical lens; ETBN Located at the head car of the EMU, it can convert vehicle-level data transmitted within the EMU into train-level data transmitted between different EMUs to prepare for subsequent data transmission between EMUs; the photoelectric conversion module is located on the EMU The reconnection coupler can receive the train-level data forwarded by ETBN through the Ethernet cable and convert the train-level data from the Ethernet signal into an optical signal. The reconnection coupler is located at the end of the EMU and is used to connect two EMUs. Device; the optical lens is located between the two photoelectric conversion modules corresponding to the two EMU units. When the two EMU units are reconnected, the optical lens can transmit the corresponding optical signal data of the two EMU units to each other to realize the reconnection of different EMU units. time data transmission. Through the above system, since the optical lens does not connect the two train sets with different potentials, the optical communication method will not form a backflow current, and can achieve stable data transmission when the EMU is reconnected.

Description of the drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are: For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of a data transmission system for EMUs provided by an embodiment of the present application;

Figure 2 is an overall topology diagram of the data transmission system for EMUs provided by the embodiment of the present application;

Figure 3 is a flow chart of a data transmission method for an EMU provided by an embodiment of the present application.

Detailed ways

In order to enable those in the technical field to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only These are part of the embodiments of this application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

The terms "first", "second", "third", "fourth", etc. (if present) in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects without necessarily using Used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "include" and "having" and any variations thereof are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus that encompasses a series of steps or units and need not be limited to those explicitly listed. Those steps or elements may instead include other steps or elements not expressly listed or inherent to the process, method, product or apparatus.

Before further describing the embodiments of this application in detail, the English abbreviations involved in the embodiments of this application will be described. The corresponding Chinese explanations of the English abbreviations involved in the embodiments of this application include:

Train backbone Ethernet (ethernet train backbone, ETB), train backbone Ethernet node (ethernet train backbone node, ETBN), Ethernet consist network (ECN), Ethernet consist network switch (ethernet consist network node, ECNN), Central control unit (CCU), logic control unit (LCU), brake control unit (BCU), human machine interface (HMI), wireless transmission device (wireless) transmission device (WTD), automatic train operation (ATO), traction control unit (TCU).

When EMUs are actually traveling, multiple EMUs often need to be reconnected to adapt to more scenarios. After the EMUs are reconnected, the current related technology mainly uses Ethernet cables as the communication medium to transmit data between the two EMUs, and since the data transmitted by the reconnection is train-level data transmitted between different EMUs, the amount of data It is relatively large and cannot use 100M Ethernet cables. Gigabit Ethernet cables need to be used. Since the potentials of the two EMU train bodies will not be the same after the EMU is reconnected, in order to prevent backflow current from connecting the two EMU train bodies through the Ethernet cable after the EMU is reconnected, the shielding layer of the Ethernet cable will be connected to the reconnect coupler. Discontinuity everywhere. For 100M-class Ethernet cables, the impact of shielding discontinuity on communication quality may not be too great. However, for Gigabit-class Ethernet cables, the shielding layer of the Ethernet cable must be connected to ensure the quality of communication. Therefore How to achieve stable data transmission after EMU reconnection is an urgent problem that needs to be solved.

In view of this, embodiments of the present application provide a data transmission system, EMU and method for EMUs, which can achieve stable data transmission without forming a backflow current after the EMUs are reconnected.

The following describes a data transmission system for EMUs provided by an embodiment of the present application through system embodiments, as shown in Figure 1. Figure 1 is a schematic diagram of a data transmission system for EMUs provided by an embodiment of the present application. The system includes ETBN101, photoelectric conversion module 102 and optical lens 102.

The ETBN is located at the head car of the EMU. The ETBN is used to convert the vehicle-level data transmitted by the EMU into train-level data. The EMU includes two head cars at the end and multiple intermediate cars. The vehicle-level data is used to represent the Data transmitted within the EMU, train-level data is used to represent data transmitted between different EMUs.

EMU, also known as EMU train, refers to a vehicle composed of multiple vehicles running on a high-speed railway. The vehicle at the end is the lead vehicle and the vehicle in the middle is the intermediate vehicle.

EMU reconnection refers to connecting different EMUs through the reconnection coupler located at the end of the EMU to improve transportation capacity.

The communication structure of the EMU adopts a two-level communication topology, that is, ETB is used to realize train-level data transmission, and ECN is used to realize vehicle-level data transmission.

In order to facilitate data transmission after the EMU is reconnected, the length of the Ethernet cable used to transmit data between the ETBN and the photoelectric conversion module is reduced. The ETBN is located at the head of the EMU.

As shown in Figure 2, Figure 2 is an overall topology diagram of the data transmission system for the EMU provided by the embodiment of the present application. The EMU has 8 carriages, and 1 and 8 refer to the two leading cars of the EMU, 2 and 7 refer to the two intermediate cars of the EMU, A1 refers to ETBN1, A2 refers to ETBN2, B refers to the photoelectric conversion module, C refers to the Ethernet cable, D1 refers to ECN1, D2 refers to ECN2, and E refers to multi-core Optical cable, F1 refers to ECNN1, F2 refers to ECNN2, G1 refers to the local Ethernet network located in car 1, G2 refers to the local Ethernet network located in car 2, G7 refers to the local Ethernet network located in car 7, and G8 refers to the local Ethernet network located in car 8 The local Ethernet network of the car, CCU refers to the central control unit, LCU refers to the logic control unit, BCU refers to the brake control unit, HMI refers to the human machine interface, WTD refers to the wireless transmission device, and TCU refers to the traction control unit.

ETBN1 and ETBN2 in Figure 2 are both located at

EMU cars

1 and 8, that is, at the head car of the EMU. Since the EMU needs to travel back and forth on the high-speed railway, both ends are the head cars, so that the EMU can be realized After reaching the end point, the driver only needs to walk to the leading car at the other end to complete the reversing operation of the EMU.

It should be noted that in order to be able to realize data transmission when either end of the EMU is reconnected with other EMUs, as shown in Figure 2, the two head cars of the EMU are equipped with ETBN and other other devices. Since this application is located in The two ETBNs of the leading train can respectively obtain the vehicle-level transmission data of the EMU, so there is no need for other physical media such as Ethernet cables to connect the two ETBNs. In the current related technology, data transmission when the EMU is reconnected is realized through Gigabit Ethernet cables. In the related technology, in order to ensure that data transmission can be realized at both ends of the EMU, it is necessary to set up EMUs in all carriages. For equipment such as Gigabit Ethernet cables and connectors that transmit train-level data, the use of ETBN in this application that eliminates physical connections can reduce the number of communication lines and connectors between EMU cars, thereby reducing fault points that are prone to problems.

In order to subsequently transmit the data of the EMU to other EMUs, ETBN can convert the vehicle-level data transmitted by the EMU into train-level data.

In some embodiments, ETBN can convert the Internet Protocol Address (IP address) corresponding to the vehicle-level data into the IP address corresponding to the train-level data, so that the train-level data can be transferred between different EMUs in subsequent steps. transmission.

It should be noted that when the EMU is not reconnected, all ETBNs of the EMU are in a silent state. That is, the EMU does not need to transmit train-level data when it is not reconnected. It only needs to transmit vehicle-level data. Through control The status of ETBN can actively control the transmission of train-level data between different EMUs when the EMUs are reconnected.

The photoelectric conversion module is located at the reconnection coupler of the EMU, and an Ethernet cable is used to transmit the train-level data of the EMU with the ETBN. The photoelectric conversion module is used to convert train-level data from Ethernet signals to optical signals. The reconnection coupler is located at The end of the EMU is used to connect two EMUs.

The reconnection coupler is located at the end of the EMU and is used to connect two EMUs when the EMU is reconnected.

As shown in Figure 2, there is an Ethernet cable between the photoelectric conversion module and the ETBN. The Ethernet cable can transmit the train-level data converted by the ETBN to the photoelectric conversion module. Since the amount of train-level data is relatively large, the Ethernet cable Gigabit Ethernet cables can be used.

The photoelectric conversion module converts the received train-level data from Ethernet signals into optical signals, and makes corresponding preparations for subsequent optical lens transmission of the train-level data.

The optical lens is located between the two photoelectric conversion modules corresponding to the two EMUs. The optical lens is used to transmit the optical signal data corresponding to the two EMUs to each other when the two EMUs are reconnected to achieve data between different EMUs. transmission.

An optical lens can be placed between the two photoelectric conversion modules corresponding to the two EMUs, so that when the two EMUs are reconnected, any EMU can transmit the optical signal generated by the photoelectric conversion module to the other through the optical lens. The EMU can also receive the optical signal transmitted by another EMU through the optical lens to achieve stable data transmission when the two EMUs are reconnected.

Since the optical lens transmits optical signals, it can realize data transmission without physical media connection. That is, when two EMUs are reconnected, there is no need to communicate through other continuous physical media such as Ethernet cables. Therefore, there is no need to connect two trains with different potentials when using optical communication. The car body, that is, optical communication will not form a backflow current between the car bodies of the two train sets.

In some embodiments, the system also includes ECN and ECNN using optical fiber as the communication medium;

ECN is used to transmit vehicle-level data between all carriages included in the EMU;

ECNN is located at the head car of the EMU. ECNN is used to forward vehicle-level data between all carriages included in the EMU to ETBN.

At present, Ethernet cables are mainly used as the communication medium of ECN in related technologies. Ethernet cables generally include 4-core twisted pairs with a transmission rate of 100Mbps and 8-core twisted pairs with a transmission rate of 1000Mbps. However, with the increase of communication speed and bandwidth, The transmission loss and electromagnetic interference problems of transmission media are becoming more and more serious. Since optical fiber can provide data transmission channels above 10Gbps and can meet the data transmission requirements of EMUs. At the same time, optical fiber has low transmission loss and strong resistance to electromagnetic interference. Therefore, this application uses optical fiber as the communication medium of ECN to achieve vehicle-level EMU Stable transmission of data.

Since the aforementioned ETBN can convert the vehicle-level data of the EMU into train-level data, and the ECN of the EMU is used to transmit the vehicle-level data of the EMU, an ECNN is set up at the head car of the EMU, and the ECNN is used to convert the EMU into The group’s vehicle-level data is forwarded to ETBN.

As shown in Figure 2, ECN1 is a loop communication structure using optical fiber as the medium to realize the transmission of vehicle-level data between all carriages of the EMU. Corresponding ECNN1s are set up on

carriages

1 and 8 to facilitate the transmission of vehicle-level data. The vehicle-level data transmitted on the ECN is forwarded to ETBN1 through the ECNN1 located on the head train, so that ETBN1 can accept the vehicle-level data on the EMU.

In some embodiments, the system also includes multiple local Ethernet networks using Ethernet lines as communication media, and the number of ECNNs is a plurality matching the local Ethernet networks;

The local Ethernet network is located in each carriage included in the EMU and is used for data transmission within each carriage;

ECNN includes ECNN located in the leading car and ECNN located in the middle car;

The ECNN located in the head car is used to forward vehicle-level data between all carriages included in the EMU to ETBN, as well as data exchange between different devices inside the head car and data exchange between different carriages of the EMU;

The ECNN located in the middle car is used for data exchange between different devices inside the middle car and data exchange between different carriages of the EMU.

In order to realize data transmission inside the EMU carriage, the corresponding local Ethernet network can be set up using Ethernet cables as the communication medium. The reason why the local Ethernet network does not use optical fiber as the communication medium is because the data transmission volume inside the carriage is small, so 100-megabit-level cables are used. Ethernet cables can meet the data transmission needs inside the carriage. Therefore, in order to save costs, there is no need to use optical fiber as the communication medium. Instead, 100-megabit Ethernet cables can be used as the communication medium.

As shown in Figure 2, G1 is the local Ethernet network of vehicle 1, used to realize data transmission between CCU, LCU, BCU, HMI, WTD and ATO inside vehicle 1; G2 is the local Ethernet network of vehicle 2, used for Realize data transmission between BCU, LCU and TCU inside 2 cars.

ECNN is a switch used for Ethernet data transmission. In order to realize data transmission within the carriage and transmit vehicle-level data to ETBN, in this application, the local Ethernet network of each carriage of the EMU is equipped with ECNN.

It should be noted that the number of matching ECNNs for each carriage in the EMU can be one local Ethernet network equipped with one ECNN. When there are many devices connected to the local Ethernet network, it can also be one local Ethernet network equipped with multiple ECNNs. , to achieve data exchange between multiple devices.

As shown in Figure 2, a corresponding local Ethernet network is set up inside each car. G1 is the local Ethernet network of car 1, which is used to realize data transmission between different devices inside car 1. Correspondingly, G1 is located in car 1 In addition to forwarding the vehicle-level data between all compartments to ETBN1 as mentioned above, the ECNN1 can also realize data exchange between different devices within 1 vehicle and with other compartments such as 2 vehicles; G2 is 2 The local Ethernet network of the vehicle. ECNN1 located in the 2nd vehicle is not connected to ETBN1, so there is no need to forward vehicle-level data to ETBN1. It is only used to realize data exchange between different devices inside the 2nd vehicle and with other vehicles such as the 1st vehicle. Data exchange between carriages.

In some embodiments, the number of ECNs includes multiples, the number of ETBNs includes multiples matching multiple ECNs, and the number of ECNNs includes multiples matching multiple ECNs and multiple local Ethernet networks.

Specifically, in order to achieve redundant transmission of data, the EMU can set up at least two ECNs to transmit the vehicle-level data of the EMU. When the number of ECNs is multiple, it is used to convert the vehicle-level data into train-level data. The number of ETBN should match the ECN. The ECNN used for data exchange needs to match the ECN in addition to matching multiple local Ethernet networks.

As shown in Figure 2, in order to achieve dual-backup redundant transmission of massive data, vehicle-level data is transmitted through the dual-channel optical fiber communication structure of ECN1 and ECN2. Specifically, ECN1 of vehicles 1 to 8 forms an A-channel optical ring network, ECN2 forms a B-channel optical ring network. There are ETBN1 and ETBN2 on

cars

1 and 8 respectively. They convert the vehicle-level data of road A into train-level data and the vehicle-level data of road B into train-level data. Between

cars

1 and 8, ECN2 The eight carriages of the car are also connected to the corresponding ECNN1 and ECNN2 respectively to achieve redundant transmission of data.

In addition, in related technologies, when Gigabit Ethernet cables are used as the communication medium of ECN, in addition to the need to achieve redundant transmission of data, in order to ensure reliable transmission of data, at least one reserved line needs to be configured in case the current Ethernet line fails. It can be replaced in time, that is, during the actual data transmission process of the EMU, the ECN of the EMU will usually be equipped with at least three or more. In this application, optical fiber is used as the communication medium and multi-core optical cable can be used. As shown in Figure 2, the multi-core optical cable can Replace multiple Ethernet lines in related technologies to reduce the weight of the EMU and achieve lightweight design of the train.

In some embodiments, ECN is used to transmit data according to a data transmission table, and the data transmission table is used to represent the correspondence between data types and data transmission time.

EMUs usually need to transmit multiple types of data. Ethernet has the advantages of large bandwidth and multi-protocol support, and can realize the integrated transmission of multiple types of data for EMUs. However, Ethernet has the characteristic of "best effort" when transmitting data. , which will lead to problems such as uncertainty, non-real-time, and packet loss in data transmission, reducing the reliability of data transmission.

Therefore, this application uses a data transmission table to implement strict data transmission planning. The data transmission table is used to represent the correspondence between data types and data transmission time. For example, when a train set needs to transmit data types, it includes data type A and data type B. When data type C is used, you can plan to first transmit data of data type A for 10 milliseconds, then transmit data of data type B for 10 milliseconds, then transmit data of data type C for 10 milliseconds, and then continue to transmit data of data type A for 10 milliseconds. It takes 10 milliseconds to transmit data of data type B and 10 milliseconds to transmit data of data type C to ensure that regardless of the size of data of data type B or data type C, data of data type A can be transmitted every 20 milliseconds. To ensure the certainty and real-time nature of data transmission.

In some embodiments, data types include control data, monitoring data, video data, and maintenance data.

In the actual transmission of EMU data, the data that needs to be transmitted usually includes control data and maintenance data with high real-time requirements, as well as surveillance data and video data with low real-time requirements. Therefore, the corresponding data can be adjusted for different data types. Transfer table.

In some embodiments, when multiple ECNs perform data transmission according to a data transmission table, Ethernet lines are also included between multiple ETBNs. The data transmission table is used to represent the correspondence between data types and data transmission time.

As mentioned above, in order to ensure the redundant transmission of EMU data, multiple ECNs can be set up to transmit the vehicle-level data of the EMU. At this time, if a data transmission table is used for data transmission, the accuracy of the time is required. Higher, because ECN is two independent physical loops, in order to meet the time synchronization requirements between all devices connected to multiple ECNs, Ethernet cables can be configured between multiple ETBNs with matching ECNs to achieve two The time synchronization of the ETBN of the loop enables time synchronization between all devices connected to the two ECNs.

In some embodiments, the system also includes a CCU and an LCU, the CCU is used to implement train-level functions, and the LCU is used to control the hardware of the EMU.

In order to achieve a high degree of integration of EMU equipment, on the basis that CCU is used to realize the overall control of the entire vehicle, LCU can replace the relays and hard-wired circuits of the EMU hardware to integrate the control functions of the EMU hardware. , the hardware of the EMU includes air conditioning, door systems, etc. to achieve a high degree of integration of control equipment.

To sum up, the embodiments of this application provide a data transmission system for EMUs. The system includes a train backbone Ethernet node (ETBN), a photoelectric conversion module and an optical lens; the ETBN is located at the head of the EMU. The vehicle-level data transmitted within the EMU can be converted into train-level data transmitted between different EMUs to prepare for subsequent data transmission between EMUs; the photoelectric conversion module is located at the reconnection coupler of the EMU. It can receive train-level data forwarded by ETBN through Ethernet cables and convert the train-level data from Ethernet signals into optical signals. The reconnection coupler refers to a device located at the end of the EMU to connect two EMUs; the optical lens is located at Between the two photoelectric conversion modules corresponding to the two EMUs, when the two EMUs are reconnected, the optical lenses can transmit the corresponding optical signal data of the two EMUs to each other to achieve data transmission when different EMUs are reconnected. Through the above system, since the optical lens does not connect the two train sets with different potentials, the optical communication method will not form a backflow current, and can achieve stable data transmission when the EMU is reconnected.

The following describes a data transmission method for EMUs provided by the embodiment of the present application through method embodiments, as shown in Figure 3. Figure 3 is a flow chart of a data transmission method for EMUs provided by the embodiment of the present application. , applied to data transmission systems including ETBN, photoelectric conversion modules and optical lenses. The method includes:

S301. ETBN converts the vehicle-level data transmitted by the EMU into train-level data. The ETBN is located at the head car of the EMU. The EMU includes two head cars at the end and multiple intermediate cars. The vehicle-level data is used to represent the The data transmitted within the EMU, train-level data is used to represent the data transmitted between different EMUs;

S302. The photoelectric conversion module converts train-level data from Ethernet signals to optical signals. The photoelectric conversion module is located at the reconnection coupler of the EMU, and an Ethernet cable is used to transmit the train-level data of the EMU with the ETBN. The reconnection coupler is located at The end of the EMU is used to connect two EMUs;

S303. The optical lens transmits the optical signal data corresponding to the two EMUs to each other when the two EMUs are reconnected to realize data transmission between different EMUs. The optical lens is located between the two photoelectric conversion modules corresponding to the two EMUs. between.

In some embodiments, a data transmission method for EMUs further includes:

ECN transmits vehicle-level data between all carriages included in the EMU. ECN uses optical fiber as the communication medium;

ECNN forwards vehicle-level data between all carriages included in the EMU to ETBN, and ECNN is located at the head car of the EMU.

In some embodiments, a data transmission method for EMUs further includes:

Multiple local Ethernet networks transmit data inside each carriage respectively. Multiple local Ethernet networks use Ethernet lines as communication media and are located in each carriage included in the EMU;

The ECNN located in the head car forwards vehicle-level data between all carriages included in the EMU to ETBN, and exchanges data between different devices inside the head car and between different carriages in the EMU;

The ECNN located in the middle car exchanges data between different devices inside the middle car and between different carriages of the EMU.

In some embodiments, a data transmission method for EMUs further includes:

ECN transmits data according to the data transmission table, which is used to represent the correspondence between data types and data transmission time.

In some embodiments, a data transmission method for EMUs further includes:

The CCU implements train-level functions and the LCU controls the hardware of the EMU.

It should be noted that the specific steps in the method embodiments provided in the above embodiments of the present application may refer to the corresponding implementation manners in the above system embodiments, and will not be described again here.

The embodiment of the present application provides an EMU, which is characterized in that it includes the data transmission system for the EMU provided in the above system embodiment.

Those skilled in the art may further realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. In order to clearly illustrate the possible functions of hardware and software, Interchangeability, in the above description, the composition and steps of each example have been generally described according to functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

A data transmission system for EMUs, characterized in that the system includes: a train backbone Ethernet node ETBN, a photoelectric conversion module and an optical lens;

The ETBN is located at the head car of the EMU. The ETBN is used to convert the vehicle-level data transmitted by the EMU into train-level data. The EMU includes two head cars located at the end and multiple Intermediate car, the vehicle-level data is used to represent data transmitted within the EMU, and the train-level data is used to represent data transmitted between different EMUs;

The photoelectric conversion module is located at the reconnect coupler of the EMU and uses an Ethernet cable to transmit the train-level data of the EMU with the ETBN. The photoelectric conversion module is used to convert the train-level data from The Ethernet signal is converted into an optical signal, and the reconnection coupler is located at the end of the EMU for coupling two EMUs;

The optical lens is located between the two corresponding photoelectric conversion modules of the two EMUs. The optical lens is used to transmit the corresponding optical signal data of the two EMUs to each other when the two EMUs are reconnected. , to realize data transmission between the different EMUs.
The system according to claim 1, characterized in that the system further includes an Ethernet marshalling network ECN using optical fiber as a communication medium and an Ethernet marshalling network switch ECNN;

The ECN is used to transmit vehicle-level data between all carriages included in the EMU;

The ECNN is located at the head car of the EMU, and the ECNN is used to forward vehicle-level data between all carriages included in the EMU to the ETBN.
The system according to claim 2, wherein the system further includes a plurality of local Ethernet networks using Ethernet lines as communication media, and the number of ECNNs is a plurality matching the local Ethernet networks;

The plurality of local Ethernet networks are respectively located at each carriage included in the EMU, and are respectively used for data transmission inside each carriage;

The plurality of ECNNs include an ECNN located on the leading vehicle and an ECNN located on the intermediate vehicle;

The ECNN located on the head car is used to forward vehicle-level data between all carriages included in the EMU to the ETBN, as well as exchange data between different devices inside the head car and the EMU Data exchange between different carriages in a group;

The ECNN located in the intermediate car is used for data exchange between different devices inside the intermediate car and data exchange between different carriages of the EMU.
The system according to claim 3, wherein the number of ECNs includes multiple, the number of ETBNs includes multiples matching the multiple ECNs, and the number of ECNNs includes multiples matching the multiple ECNs. A plurality of ECNs matching the plurality of local Ethernet networks.
The system according to claim 2, characterized in that the ECN is used to transmit data according to a data transmission table, and the data transmission table is used to represent the correspondence between data types and data transmission time.
The system of claim 5, wherein the data types include control data, monitoring data, video data and maintenance data.
The system according to claim 4, characterized in that when the plurality of ECNs perform data transmission according to a data transmission table, Ethernet lines are also included between the plurality of ETBNs, and the data transmission table is used to represent data types. Correspondence with data transmission time.
The system according to claim 1, characterized in that the system further includes a central control unit CCU and a logical control unit LCU, the CCU is used to implement train-level functions, and the LCU is used to control the hardware of the EMU .
An EMU, characterized by comprising the data transmission system for the EMU described in any one of claims 1 to 8.
A data transmission method for EMUs, which is characterized in that it is applied to a data transmission system including a train backbone Ethernet node ETBN, a photoelectric conversion module and an optical lens. The method includes:

The ETBN converts the vehicle-level data transmitted by the EMU into train-level data. The ETBN is located at the head car of the EMU. The EMU includes two head cars located at the end and multiple intermediate cars. , the vehicle-level data is used to represent data transmitted within the EMU, and the train-level data is used to represent data transmitted between different EMUs;

The photoelectric conversion module converts the train-level data from Ethernet signals into optical signals. The photoelectric conversion module is located at the reconnect coupler of the EMU and uses an Ethernet cable to transmit the EMU with the ETBN. The train level data of the group, the reconnection coupler is located at the end of the EMU and is used to couple two EMUs;

The optical lens transmits the optical signal data corresponding to the two EMUs to each other when the two EMUs are reconnected to realize data transmission between the different EMUs. The optical lens is located on the two EMUs. Between the two photoelectric conversion modules corresponding to the EMU.