A rail transit locomotive vehicle reconnection system and reconnection method

Abstract

The present invention discloses a rail transit locomotive vehicle reconnection system and a reconnection method, the system includes at least two wireless backbone network modules arranged in the locomotive vehicle driver's cab, the wireless backbone network module of the driver's cab at one end of the locomotive vehicle is connected to the MVB bus of the locomotive vehicle, the wireless backbone network module of the driver's cab at the other end of the locomotive vehicle corresponds one-to-one with the wireless backbone network module of the driver's cab at one end of the locomotive vehicle and the wireless backbone network module of the driver's cab at one end of the locomotive vehicle, the wireless backbone network module of the driver's cab at one end of the locomotive vehicle and the wireless backbone network module of the driver's cab at one end of the other reconnected locomotive vehicle are connected to the same Ethernet bus, the wireless backbone network module of the driver's cab at the reconnected end of the locomotive vehicle is wirelessly connected to the wireless backbone network module of the driver's cab at the reconnected end of the other reconnected locomotive vehicle; the wireless backbone network modules of the driver's cab at the same end are connected to each other to realize data interaction between different Ethernet buses. The present invention has hot standby redundancy performance and can ensure the safe operation of locomotive vehicles.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of wireless reconnection of rail transit locomotives and vehicles, and in particular to a rail transit locomotive and vehicle reconnection system and a reconnection method. Background Art

[0002] With the development of my country's economy and society, the demand for railway freight is still growing, and the existing railway freight capacity needs to be improved urgently. Running long-formation heavy-load freight trains and realizing the use of multiple locomotives in multiple units is the most effective way to improve railway transportation capacity on existing railway trunk lines.

[0003] The above wireless reconnection system based on wireless broadband communication does not require additional ground network base station forwarding and reinforcement devices. Compared with technologies such as 3G, it has obvious advantages in real-time, security and reliability.

[0004] The existing locomotive zero-distance wireless reconnection method and system generally only deploys one system due to factors such as the overall system cost and installation space requirements. When a failure occurs, the reconnection mode can only be returned to the stand-alone mode, affecting the normal operation of the reconnected locomotive. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in view of the problems existing in the prior art, the present invention provides a rail transit locomotive and vehicle reconnection system and a reconnection method with hot standby redundancy performance to ensure the safe operation of locomotives and vehicles.

[0006] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0007] A rail transit locomotive vehicle reconnection system includes at least two wireless backbone network modules arranged in the locomotive vehicle driver's cab, wherein the wireless backbone network module in the driver's cab at one end of the locomotive vehicle is connected to the MVB bus of the locomotive vehicle, and the wireless backbone network module in the driver's cab at the other end of the locomotive vehicle corresponds one-to-one with the wireless backbone network module in the driver's cab at one end of the locomotive vehicle and the wireless backbone network modules in the driver's cab at one end and the other end of another reconnected locomotive vehicle, wherein the wireless backbone network module in the driver's cab at one end of the locomotive vehicle and the wireless backbone network module in the driver's cab at the other end are connected to the same Ethernet bus, wherein the wireless backbone network module in the driver's cab at the reconnected end of the locomotive vehicle is wirelessly connected to the wireless backbone network module in the driver's cab at the reconnected end of the other reconnected locomotive vehicle to establish a corresponding wireless link; the wireless backbone network modules in the driver's cabs at the same end are connected to each other to realize data interaction between different Ethernet buses.

[0008] As a further improvement of the above technical solution:

[0009] Each of the wireless backbone network modules includes a microprocessor, a WiFi module, an MVB interface, an Ethernet interface and a storage chip; the WiFi module, the MVB interface, the Ethernet interface and the storage chip are all connected to the microprocessor; wherein each wireless backbone network module in the driver's cab at one end of the locomotive is connected to the MVB bus of the locomotive vehicle through the MVB interface to be connected to the central control unit and the display, each wireless backbone network module is connected to the same Ethernet bus through the Ethernet interface, and each wireless backbone network module is wirelessly connected through the WiFi module.

[0010] The wireless backbone network modules in the driver's cab at the same end are connected to each other via Ethernet interfaces.

[0011] The microprocessor, WiFi module, MVB interface, Ethernet interface and storage chip are all integrated in the same housing.

[0012] The number of wireless backbone network modules in the driver's cab at one end of each locomotive vehicle is two, and the total number of wireless backbone network modules in each locomotive vehicle is four.

[0013] The present invention also discloses a reconnection method based on the rail transit locomotive and vehicle reconnection system as described above, comprising:

[0014] The wireless backbone network modules in the driver's cab at one end of the locomotive exchange their own data packets, and each wireless backbone network module merges its own data packet with the data packet of other wireless backbone network modules in the same driver's cab, and then sends it to the wireless backbone network module in the driver's cab at one end of the reconnected locomotive vehicle through the corresponding wireless link;

[0015] The wireless backbone network module in the driver's cab at one end of the coupled locomotive vehicle receives the corresponding data packet, unpacks it, and sends it to other wireless backbone network modules in the driver's cab at one end of the same coupled locomotive vehicle;

[0016] The received data packet is judged. If the frame number increases, the data is considered valid; if the frame number does not change within a period of time, the data packet is considered invalid. At the same time, communication is carried out through a wireless link that does not correspond to the data packet. If the frame number of this wireless link changes, the data packet of this wireless link is considered valid and communication is carried out using this wireless link.

[0017] As a further improvement of the above technical solution:

[0018] When the wireless backbone network modules in the driver's room send their own data packets to each other, if the frame number of the exchanged data packet does not change, the data packet is invalid and is cleared.

[0019] When the data packet is invalid, it is considered that the MVB interface of the wireless backbone network module corresponding to the data packet is abnormal or the wireless link is interrupted.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] The rail transit locomotive vehicle reconnection system and reconnection method of the present invention achieves redundancy between each wireless backbone network module by arranging multiple wireless backbone network modules in the driver's cab; wireless links are constructed between each corresponding wireless backbone network module to form a multi-channel wireless link to achieve wireless link redundancy; a reconnection system with hot standby redundancy performance is constructed through the redundancy of the above-mentioned control equipment and wireless links. When the control equipment or wireless link fails, the system still has a certain redundancy through the redundant function design to ensure the safe operation of the reconnected locomotive. The above-mentioned reconnection system can be applied not only to locomotives, but also to wireless reconnection between EMUs / high-speed railways.

[0022] The present invention integrates a microprocessor, a WiFi module, an MVB interface, an Ethernet interface, and a storage chip, which is beneficial to reducing costs and reducing the space requirements for technical transformation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of a reconnection system in an embodiment of the present invention.

[0024] Figure 2 This is one of the flow charts of the reconnection method in an embodiment of the present invention.

[0025] Figure 3 This is the second flow chart of the reconnection method in the embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figure 1As shown, an embodiment of the present invention provides a rail transit locomotive vehicle reconnection system, including two wireless backbone network modules (referred to as WCM1 and WCM2) arranged in the driver's cab at the end of the locomotive vehicle I and two backbone network modules (referred to as WCM3 and WCM4) in the driver's cab at the end II, wherein the WCM1 and WCM2 located at the end of the locomotive vehicle I are connected to the MVB bus of the locomotive vehicle to be connected to the central control unit (referred to as CCU) and the display (referred to as IDU); the WCM3 and WCM4 located at the end II of the locomotive vehicle are not connected to the MVB bus of the locomotive vehicle; wherein the WCM3 and WCM4 at the end II of the locomotive vehicle (locomotive 1#) correspond one-to-one with the WCM1 and WCM2 at the end I of the locomotive vehicle (such as WCM3 corresponds to WCM1, and WCM4 corresponds to WCM2), and are connected to the WCM1 and WCM2 at the end I of another reconnected locomotive vehicle (locomotive 2#), and the WCM3 and WCM4 at the end II. 4 correspond one to one; specifically, WCM3 and WCM1 in the same locomotive are connected to the same Ethernet bus A, and WCM4 and WCM2 in the same locomotive are connected to the same Ethernet bus B; wherein the wireless backbone network modules in the driver's cab at the same end are connected to each other (such as WCM1 connected to WCM2, WCM3 connected to WCM4) to realize data interaction between different Ethernet buses; when locomotive 1# and locomotive 2# are used in reconnection, such as when the II end of locomotive 1# and the I end of locomotive 2# are connected as the reconnection end, the WCM3 at the reconnection end of locomotive 1# is wirelessly connected to the WCM1 at the reconnection end of locomotive 2# to form a wireless link 1#, and the WCM4 at the reconnection end of locomotive 1# is wirelessly connected to the WCM2 at the reconnection end of locomotive 2# to form a wireless link 2#, thereby realizing that the WCM1 and WCM2 of locomotive 1# can respectively communicate data with the WCM1 and WCM2 of locomotive 2#, and realizing the reconnection control and wireless transmission redundancy functions.

[0028] The rail transit locomotive vehicle reconnection system of the present invention realizes redundancy between the wireless backbone network modules in the driver's cab at the same end by arranging multiple wireless backbone network modules in each driver's cab; constructs wireless links between the wireless backbone network modules corresponding to each locomotive vehicle, thereby forming multi-channel wireless links, and realizing multi-channel wireless link redundancy between each locomotive vehicle; through the redundancy of the above-mentioned control equipment and wireless links, a reconnection system with hot standby redundancy performance is constructed. When the control equipment or wireless link fails, the system still has a certain redundancy through the redundant function design, thereby ensuring the safe operation of the reconnected locomotive vehicle. The above-mentioned reconnection system can be applied not only to locomotives, but also to wireless reconnection between EMUs / high-speed railways.

[0029] In a specific embodiment, each wireless backbone network module includes a microprocessor, a WiFi module, an MVB interface, an Ethernet interface and a storage chip, and the WiFi module, the MVB interface, the Ethernet interface and the storage chip are all connected to the microprocessor. The wireless backbone network module (WCM1 and WCM2 located at the I end of the locomotive vehicle) is connected to the MVB bus of the locomotive vehicle through the MVB interface to connect to the central control unit and the display, and each wireless backbone network module is connected to the same Ethernet bus through the Ethernet interface, and each wireless backbone network module is wirelessly connected through the WiFi module; the wireless backbone network modules in the same driver's room are connected to each other through the Ethernet interface. The above wireless backbone network module has the functions of reconnection control, WiFi wireless communication, multi-function locomotive vehicle bus (MVB) communication, Ethernet communication, recording, etc. The integration of the above microprocessor, WiFi module, MVB interface, Ethernet interface and storage chip is conducive to reducing costs and reducing the space requirements for technical transformation and installation.

[0030] like Figure 1 As shown in the figure, the Ethernet interface (ETH1) provided by the WCM is an independent network port, through which two WCMs in the same driver's cab can be connected to realize data interaction between different Ethernet buses. In addition, WCM4 also has a third Ethernet interface (ETH3) connected to the reconnection control board (LCG for short). Each WCM has a WiFi module, and establishes a wireless connection with the WCM corresponding to the reconnected locomotive through its own connected feeder and antenna (2-way, MIMO mode), such as the odd-numbered WCMs are interconnected (WCM3 of locomotive 1# is connected to WCM1 of locomotive 2#), forming wireless link 1#; the even-numbered WCMs are interconnected (WCM4 of locomotive 1# is connected to WCM2 of locomotive 2#), forming wireless link 2#. When WCM1 and wireless link 1# are normal, WCM1 realizes the connection, marshaling, demarshaling, and reconnection data transmission functions of the reconnected locomotives; when WCM1 fails and wireless link 1# occurs, WCM2 and wireless link 2# take over and continue to realize the connection, marshaling, demarshaling, and reconnection control functions of the reconnected locomotives; through two independent wireless backbone network modules, an independent system is built to achieve control equipment redundancy.

[0031] The present invention integrates the original control equipment, wireless communication equipment, bus interface equipment, etc. through system integration, and constructs a locomotive reconnection system based on the equipment. While reducing the overall cost of the system, two systems are arranged on the locomotive to increase the redundancy of the system. When a system module or functional unit fails, the system still has a certain redundancy through redundant function design, thereby improving the redundancy and reliability of the wireless reconnection system and ensuring the safe and stable operation of heavy-load freight trains.

[0032] like Figure 2 and Figure 3As shown, the embodiment of the present invention further discloses a reconnection method based on the rail transit locomotive and vehicle reconnection system as described above, comprising the steps of:

[0033] The wireless backbone network modules in the same driver's cab exchange and send their own data packets. Each wireless backbone network module merges its own data packet with the data packets of other wireless backbone network modules in the same driver's cab and sends them to the reconnected locomotive vehicle through the corresponding wireless link.

[0034] The wireless backbone network module of the reconnected locomotive vehicle decompresses the corresponding data packet after receiving it, and sends it to other wireless backbone network modules of the same reconnected locomotive vehicle;

[0035] The received data packet is judged. If the frame number increases, the data is considered valid; if the frame number does not change within a period of time, the data packet is considered invalid; communication is carried out through a wireless link that does not correspond to the data packet. If the frame sequence number changes at this time, the data packet of the redundant link is considered valid, the data packet of the redundant link is used, and communication with it continues, thereby making the system redundant.

[0036] The reconnection method of the present invention, through the redundancy of the control device and the wireless link, still has a certain redundancy when the control device or the wireless link fails, thereby ensuring the safe operation of the reconnected locomotive.

[0037] The method of the present invention is further described in detail below in conjunction with a specific embodiment:

[0038] 1) Merge and send redundant link data. First, WCM1 and WCM2 in the driver's cab at end I of locomotive 1# send their own UDP data packets through ETH1; WCM1 merges its own UDP1 data packet with the UDP2 data packet exchanged by WCM2, and then sends it to WCM1 of the reconnected locomotive vehicle (locomotive 2#) through wireless link 1#; WCM2 at end I of locomotive 1# merges its own UDP2 data packet with the UDP1 data packet exchanged by WCM1, and then sends it to WCM2 of the reconnected locomotive vehicle (locomotive 2#) through wireless link 2#;

[0039] If the frame number of the interactive UDP data packet does not change, the data packet is considered invalid and cleared;

[0040] 2) Receiving and processing of redundant link data. WCM1 (or WCM2) of locomotive 2# unpacks the received data packet according to the packaging format and sends the redundant link data packet to WCM2 (or WCM1) through ETH1;

[0041] The received UDP1 data packets (sent directly or through interaction) are judged. If the frame number increases, the data is considered valid, saved and processed continuously; if the frame number does not change, the data is considered invalid and not processed; if the frame number does not change within 10 consecutive seconds, it is considered that the MVB bus interface of WCM1 of locomotive 1# is faulty or the wireless link 1# is interrupted;

[0042] The received UDP2 data packets (sent directly or through interaction) are judged. If the frame number increases, the data is considered valid and saved and processed later. If the frame number does not change, the data is considered invalid and not processed. If the frame number does not change for 10 consecutive seconds, it is considered that the MVB bus interface of WCM2 is faulty or wireless link 2# is interrupted.

[0043] Specifically, if the MVB bus interface of WCM1 of locomotive 1# fails, the UDP1 packet of WCM1 of locomotive 1# is invalid; the UDP2 packet of WCM2 of locomotive 1# is valid. Through interactive transmission, WCM1 of locomotive 1# can still receive the UDP2 packet of WCM2 and send it to WCM1 of locomotive 2# through wireless link 1#. The control of this locomotive, wireless link and the control of the reconnected locomotive are still redundant. If a new fault occurs at this time, the normal reconnected control mode can still be maintained.

[0044] If the wireless link 1# communication is interrupted, at this time, the UDP1 data packet of WCM1 of locomotive 1# is sent to WCM2 through wireless link 2#, and then sent to WCM2 of locomotive 2#. After unpacking, both WCM1 and WCM2 of locomotive 2# can receive valid data packets, and the control of this locomotive and the control of the reconnected locomotive are still redundant. At this time, if a new fault occurs (except for the interruption of wireless link 2# communication), the system can still maintain the normal reconnection control mode.

[0045] Of course, if the MVB bus interface of WCM2 of locomotive 1# fails or the communication of wireless link 2# is interrupted, control and redundant control of the reconnected locomotives are also carried out through the interaction between WCM1 and WCM2 of locomotive 1# and wireless link 1#.

[0046] As shown in the present disclosure and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. The words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0047] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A reconnection method based on a rail transit locomotive and vehicle reconnection system, characterized in that: The rail transit locomotive vehicle reconnection system includes at least two wireless backbone network modules arranged in the locomotive vehicle driver's cab, wherein the wireless backbone network module in the driver's cab at one end of the locomotive vehicle is connected to the MVB bus of the locomotive vehicle, and the wireless backbone network module in the driver's cab at the other end of the locomotive vehicle corresponds one-to-one with the wireless backbone network module in the driver's cab at one end of the locomotive vehicle and the wireless backbone network module in the driver's cab at one end of the other reconnected locomotive vehicle, wherein the wireless backbone network module in the driver's cab at one end of the locomotive vehicle and the wireless backbone network module in the driver's cab at the other end of the locomotive vehicle are connected to the same Ethernet bus, wherein the wireless backbone network module in the driver's cab at the reconnected end of the locomotive vehicle is wirelessly connected to the wireless backbone network module in the driver's cab at the reconnected end of the other reconnected locomotive vehicle to establish a corresponding wireless link; The wireless backbone network modules in the driver's cab at the same end are interconnected to realize data interaction between different Ethernet buses; Reconnection methods include: The wireless backbone network modules in the driver's cab at one end of the locomotive exchange their own data packets with each other, and each wireless backbone network module merges its own data packet with the data packet of other wireless backbone network modules in the same driver's cab, and then sends it to the wireless backbone network module in the driver's cab at one end of the reconnected locomotive vehicle through the corresponding wireless link; The wireless backbone network module in the driver's cab at one end of the coupled locomotive vehicle receives the corresponding data packet, unpacks it, and sends it to other wireless backbone network modules in the driver's cab at one end of the same coupled locomotive vehicle; The received data packet is judged. If the frame number increases, the data is considered valid; if the frame number does not change within a period of time, the data packet is considered invalid. At the same time, communication is carried out through a wireless link that does not correspond to the data packet. If the frame number of this wireless link changes, the data packet of this wireless link is considered valid and communication is carried out using this wireless link.

2. The reconnection method according to claim 1, characterized in that: When the wireless backbone network modules in the driver's room send their own data packets to each other, if the frame number of the exchanged data packet does not change, the data packet is invalid and is cleared.

3. The reconnection method according to claim 1, characterized in that: When the data packet is invalid, it is considered that the MVB interface of the wireless backbone network module corresponding to the data packet is abnormal or the wireless link is interrupted.

4. The reconnection method according to claim 1, characterized in that: Each of the wireless backbone network modules includes a microprocessor, a WiFi module, an MVB interface, an Ethernet interface and a storage chip; the WiFi module, the MVB interface, the Ethernet interface and the storage chip are all connected to the microprocessor; wherein each wireless backbone network module in the driver's cab at one end of the locomotive is connected to the MVB bus of the locomotive vehicle through the MVB interface to be connected to the central control unit and the display, each wireless backbone network module is connected to the same Ethernet bus through the Ethernet interface, and each wireless backbone network module is wirelessly connected through the WiFi module.

5. The reconnection method according to claim 4, characterized in that: The wireless backbone network modules in the driver's cab at the same end are connected to each other via Ethernet interfaces.

6. The reconnection method according to claim 4 or 5, characterized in that: The microprocessor, WiFi module, MVB interface, Ethernet interface and storage chip are all integrated in the same housing.

7. The reconnection method according to claim 1, characterized in that: The number of wireless backbone network modules in the driver's cab at one end of each locomotive vehicle is two, and the total number of wireless backbone network modules in each locomotive vehicle is four.

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