An Ethernet switch, a train flexible formation system and method

Abstract

The present invention provides an Ethernet switch, a train flexible formation system and method. The Ethernet switch includes: an ETB board and one or more power supply boards; the ETB board is used for head-to-tail communication connection with the ETB boards of adjacent Ethernet switches to form an ETB communication bus, and is used for sending communication information to adjacent ETB boards when the train is initially powered on to determine the car numbers of each train car; the power supply board includes multiple groups of point combinations, and the connection states of the multiple groups of point combinations correspond to corresponding jumper information. The power supply board is used for transmitting the jumper information to the ETB communication bus when the train is initially powered on, and the jumper information is used to determine the car type information of the train car. The car numbers and car type information in the ETB communication bus are displayed on the human-machine interface. It preferably realizes the automatic numbering of train cars, can preferably determine the car type information of each train car, and fully meets the requirements of the current flexible formation network adaptation of train cars.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit, and in particular, to an Ethernet switch, a train flexible formation system and a method. Background Art

[0002] The existing formation forms of rail vehicles are relatively fixed, generally 8+8 multiple unit formations. For the identification of the car numbers of each car in this multiple unit formation, usually, according to the pre-set port allocation rules, corresponding port information is allocated to the equipment of each car, and the allocated port information is integrated into the application programs of the equipment of each car. Each car gateway control module identifies the car number by reading the port information of the equipment of each car in the application program.

[0003] However, this solution is only applicable to the situation where the number and relative positions of each car do not change. When the number and relative positions of the cars change, if this solution is used, the accurate car number cannot be obtained, and the current demand for network adaptability of flexible formation of rail vehicle (train) cars cannot be well met. Summary of the Invention

[0004] The present invention provides an Ethernet switch, a train flexible formation system and a method, which are used to solve the problem that when the number and relative positions of the cars of a rail vehicle change in the prior art, the rail vehicle network cannot identify the accurate car number, and the current demand for network adaptability of flexible formation of rail vehicle cars cannot be well met.

[0005] The present invention provides an Ethernet switch, including:

[0006] An ETB board, and one or more power supply boards;

[0007] The ETB board is used for communicating head-to-tail with the ETB boards of adjacent Ethernet switches to form an ETB communication bus, and is used for sending communication information to adjacent ETB boards when the train is initially powered on to determine the number of cars and the relative positions of the cars, and based on the number of cars and the relative positions of the cars, determining the car number of each train car;

[0008] The power supply board includes multiple groups of point combinations, and the connection states of the multiple groups of point combinations respectively correspond to corresponding jumper information. The power supply board is used for transmitting the jumper information to the ETB communication bus when the train is initially powered on. The jumper information is used to determine the vehicle type information of the train cars, and the car numbers and vehicle type information in the ETB communication bus are displayed on a preset human-machine interaction interface.

[0009] Optionally, the ETB board card includes at least one head port and at least one tail port. The head port of any ETB board card is communicatively connected to the tail port of an adjacent ETB board card, and the tail port of the ETB board card is communicatively connected to the head port of another adjacent ETB board card to form the ETB communication bus.

[0010] Optionally, when the train is initially powered on, the ETB board card is specifically configured to send communication information to an adjacent ETB board card, determine a first transmission path of the communication information along the output direction of the head port, and a second transmission path of the communication information along the output direction of the tail port. Based on the first transmission path and the second transmission path, determine the number of carriages and the relative positions of the carriages, and based on the number of carriages, the relative positions of the carriages, and a preset carriage numbering rule, determine the carriage numbers of each train carriage.

[0011] Optionally, the carriage numbering rule is as follows: when the train head is at the tail of the first transmission path, along the transmission direction of the first transmission path, the carriage numbers corresponding to each ETB board card decrease in sequence; along the transmission direction of the second transmission path, the carriage numbers corresponding to each ETB board card increase in sequence;

[0012] when the train head is at the tail of the second transmission path, along the transmission direction of the first transmission path, the carriage numbers corresponding to each ETB board card increase in sequence; along the transmission direction of the second transmission path, the carriage numbers corresponding to each ETB board card decrease in sequence.

[0013] Optionally, each group of the point combinations includes a positive potential and a negative potential, and the connection states of the positive potential and the negative potential in each group of the point combinations are short - circuited or idle;

[0014] When the positive potential and the negative potential in the point combination are short - circuited, the jumper information corresponding to the point combination is a preset short - circuit value; when the connection state of the positive potential and the negative potential in the point combination is idle, the jumper information corresponding to the point combination is a preset idle value.

[0015] Optionally, the jumper information of each power board card has corresponding vehicle type information. The multiple power board cards include: redundant first and second power board cards, and the jumper information corresponding to the first power board card and the second power board card is the same.

[0016] Optionally, it further includes: an ECN board card, configured to collect device information of at least one carriage device through the gateway device of each train carriage and transmit the device information to the ETB communication bus.

[0017] Optionally, the car number, vehicle type information, and device information in the ETB communication bus are transmitted to a preset human-machine interface through the gateway device of the target car. The human-machine interface displays the car number, vehicle type information, and device information in the form of a whole train formation topology graph. The human-machine interface includes a confirmation button for locking the current whole train formation topology. When the confirmation button is triggered, the whole train formation topology is locked.

[0018] The present invention also provides a train flexible formation system, including a plurality of Ethernet switches as described in any one of the above. Each of the Ethernet switches is respectively located in the corresponding train car to complete the flexible formation of the train.

[0019] The present invention also provides a train flexible formation method based on the Ethernet switch as described in any one of the above, including:

[0020] When the train is initially powered on, use the Ethernet switch to determine the car number and vehicle type information;

[0021] Based on the car number and vehicle type information, construct a whole train formation topology;

[0022] Display the whole train formation topology on the human-machine interface of the target car;

[0023] If the whole train formation topology is confirmed, lock the whole train formation topology until the train is powered on again.

[0024] The present invention also provides a train, including: a plurality of train cars, and an Ethernet switch as described in any one of the above. The Ethernet switch is arranged in the train car.

[0025] Advantages of the present invention: An Ethernet switch, a train flexible formation system and method provided by the present invention, by setting an ETB board and one or more power supply boards; the ETB board is used for head-to-tail communication connection with the ETB boards of adjacent Ethernet switches to form an ETB communication bus, and is used for sending communication information to adjacent ETB boards when the train is initially powered on to determine the number of carriages and the relative positions of the carriages, and based on the number of carriages and the relative positions of the carriages, determine the carriage numbers of each train carriage; the power supply board includes multiple groups of point combinations, and the connection states of the multiple groups of point combinations correspond to corresponding jumper information. The power supply board is used for transmitting the jumper information to the ETB communication bus when the train is initially powered on, and the jumper information is used to determine the vehicle type information of the train carriage. The carriage numbers and vehicle type information in the ETB communication bus are displayed on a preset human-machine interaction interface. It realizes the automatic numbering of train carriages well, and can better determine the vehicle type information of each train carriage, fully meeting the needs of the current flexible formation network adaptation of rail vehicles (trains), and has a high degree of automation. Brief Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 is a schematic structural diagram of the Ethernet switch provided by the present invention;

[0028] Figure 2 is a schematic structural diagram of the ETB board in the Ethernet switch provided by the present invention;

[0029] Figure 3 is a schematic structural diagram of the dual power supply board in the Ethernet switch provided by the present invention;

[0030] Figure 4 is a schematic structural diagram of the train flexible formation system provided by the present invention;

[0031] Figure 5 is a schematic flow diagram of the train flexible formation method provided by the present invention. Detailed Embodiments

[0032] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0033] The following will describe, by way of embodiments, an Ethernet switch, a train flexible formation system and method provided by the present invention in conjunction with Figures 1 - 5 the accompanying drawings.

[0034] Please refer to Figure 1 , the Ethernet switch provided in this embodiment includes:

[0035] An ETB (Ethernet Train Backbone) board 101 and one or more power supply boards 102. The ETB board 101 and the power supply board 102 are communicatively connected.

[0036] The ETB board 101 is used to communicate with the ETB boards of adjacent Ethernet switches at the head and tail to form an ETB communication bus, and is used to send communication information to adjacent ETB boards when the train is initially powered on to determine the number of carriages and the relative positions of the carriages, and to determine the carriage numbers of each train carriage based on the number of carriages and the relative positions of the carriages.

[0037] It should be noted that each train carriage has an Ethernet switch. The ETB board 101 is physically connected to the head and tail ports of the ETB boards of adjacent Ethernet switches, that is, the adjacent ETB boards 101 are connected hand in hand to form an ETB communication bus. The output direction of the head port or the tail port of the ETB board 101 faces the locomotive direction, which is convenient for subsequent identification of the train running direction. For example, when the train is initially powered on (the ETB board 101 starts running), the output direction of the head port or the tail port is determined as the train running direction to assist in traction to identify the train running direction. In the actual implementation process, the output direction of the head port of the ETB board 101 can be fixedly set to always face or constantly face the locomotive direction. When the train is initially powered on, the output direction of the head port of the ETB board 101 can be directly determined as the train running direction. Alternatively, the output direction of the tail port of the ETB board 101 can be fixedly set to always face or constantly face the locomotive direction. When the train is initially powered on, the output direction of the tail port of the ETB board 101 can be directly determined as the train running direction, so as to assist in traction to identify the train running direction.

[0038] It should also be noted that the communication information is used for the ETB board 101 to determine the adjacent ETB boards 101, that is, to determine its neighbors, so as to determine the number of carriages and the relative positions of the carriages. Then, based on the number of carriages, the relative positions of the carriages, and the determined train running direction, each train carriage is sorted and numbered to determine the carriage number of each train carriage. This realizes the automatic numbering of carriage numbers when the train is initially powered on.

[0039] The power supply board 102 includes multiple groups of point combinations. The connection states of the multiple groups of point combinations correspond to corresponding jumper information. The power supply board 102 is used to transmit the jumper information to the ETB communication bus when the train is initially powered on. The jumper information is used to determine the vehicle type information of the train carriage. The carriage numbers and vehicle type information in the ETB communication bus are displayed on a preset human-machine interface (HMI, Human–Machine Interaction).

[0040] Specifically, the power supply board 102 is used to transmit the jumper information to the carriage control unit of the train carriage when the train is initially powered on. The carriage control unit determines the vehicle type information of the train carriage based on the jumper information and uploads the vehicle type information to the ETB communication bus. The vehicle type information includes: business car, economy car, dining car, etc. By setting the connection states of the point combinations of the power supply board to correspond to the corresponding jumper information, it is convenient to determine the vehicle type information of the train carriage. Different jumper information corresponds to corresponding vehicle type information respectively. By uploading the vehicle type information of the train carriage to the ETB communication bus, all ETB boards (ETB nodes) in the ETB communication bus can share the information in the ETB communication bus, which is convenient for any ETB board to obtain all the information in the ETB communication bus. And by displaying the carriage numbers and vehicle type information in the ETB communication bus on a preset human-machine interface, it is convenient for relevant personnel to confirm whether the displayed information is incorrect. After confirmation, the carriage numbers and vehicle type information are locked.

[0041] In some embodiments, the ETB board 101 includes at least one head port and at least one tail port. The head port of any ETB board 101 is communicatively connected to the tail port of an adjacent ETB board 101, and the tail port of the ETB board 101 is communicatively connected to the head port of another adjacent ETB board 101 to form the ETB communication bus. It should be noted that the head port of the ETB board 101 corresponding to the carriage where the train head is located does not need to be connected to the adjacent ETB board 101, and the tail port of the ETB board 101 corresponding to the train tail carriage does not need to be connected to the adjacent ETB board 101 to avoid forming a loop.

[0042] By adopting the above-mentioned Ethernet switch, the network adaptability of flexible train formation can be better realized, thus better realizing the flexible train formation.

[0043] Please refer to Figure 2 , in some embodiments, the ETB board 101 includes two head ports X1, X2, and two tail ports X3, X4. The head ports X1, X2 of the ETB board 101 are respectively physically connected to the tail ports X3, X4 of the adjacent ETB board 101 on the left side, and the tail ports X3, X4 of the ETB board 101 are respectively connected to the head ports X1, X2 of the adjacent ETB board 101 on the right side. Among them, X1, X3 occupy channel A, and X2, X4 occupy channel B, forming an ETB communication bus.

[0044] In some embodiments, the ETB board 101 is specifically configured to send communication information to the adjacent ETB board 101 when the train is initially powered on, determine a first transmission path of the communication information along the output direction of the head port, and a second transmission path of the communication information along the output direction of the tail port (i.e., train topology discovery). Based on the first transmission path and the second transmission path, determine the number of carriages and the relative positions of the carriages, and based on the number of carriages, the relative positions of the carriages, and a preset carriage numbering rule, determine the carriage numbers of each train carriage.

[0045] Specifically, the first transmission path represents a first topology, and the first topology includes: the output direction of the head port, and all the ETB boards (ETB nodes) along the output direction of the head port. The second transmission path represents a second topology, and the second topology includes: the output direction of the tail port, and all the ETB boards (ETB nodes) along the output direction of the tail port. Based on the first topology and the second topology, the number of carriages and the relative positions of the carriages can be better determined. Furthermore, based on the number of carriages, the relative positions of the carriages, and a preset carriage numbering rule, the carriage numbers of each train carriage are determined. The first topology and the second topology constitute the basic framework of the whole train formation topology.

[0046] In some embodiments, the carriage numbering rule is: when the train head is at the tail of the first transmission path, along the transmission direction of the first transmission path, the carriage numbers corresponding to each ETB board 101 decrease in sequence, and along the transmission direction of the second transmission path, the carriage numbers corresponding to each ETB board 101 increase in sequence.

[0047] Further, when the train head is at the tail of the second transmission path, along the transmission direction of the first transmission path, the carriage numbers corresponding to each ETB board 101 increase in sequence, and along the transmission direction of the second transmission path, the carriage numbers corresponding to each ETB board 101 decrease in sequence.

[0048] During the specific implementation process, errors may occur in the carriage numbering rules. For example, when the train head is at the tail of the first transmission path, along the transmission direction of the first transmission path, the carriage numbers corresponding to each ETB board 101 increase sequentially. Along the transmission direction of the second transmission path, the carriage numbers corresponding to each ETB board 101 decrease sequentially. To avoid unnecessary impacts on the carriage numbers caused by this error, the inventor proposes that in some embodiments, it further includes: verifying the carriage numbers of each determined train carriage. For example, since the power generation car is adjacent to the locomotive, it can be determined whether the carriage number of the power generation car is 1. If it is 1, it is determined that the carriage number is correct. If it is not 1, based on the preset number correction rule, the correct carriage number is obtained. The number correction rule is: "1 + total number of formation carriages - current node number", and the correct carriage number is calculated accordingly.

[0049] Please refer to Figure 3 , in some embodiments, each group of the point combinations of the power supply board 102 includes a positive potential and a negative potential, and the connection states of the positive potential and the negative potential of each group of the point combinations are short - circuited or idle. Among them, 3, 4, 5, 6, 7 of the power supply board 102 are address positive potentials, and 14, 15, 16, 17, 18 are address negative potentials. 3 and 14 form a group of point combinations, 4 and 15 form a group of point combinations, etc.

[0050] When the positive potential and the negative potential in the point combination are short - circuited, the jumper information corresponding to the point combination is a preset short - circuit value; when the connection state of the positive potential and the negative potential in the point combination is idle, the jumper information corresponding to the point combination is a preset idle value. The short - circuit value is different from the idle value. For example: the short - circuit value is 1, and the idle value is 0, etc.

[0051] Figure 3The structural schematic diagram of dual power supply cards (the first power supply card 1021 and the second power supply card 1022) in multiple Ethernet switches is shown (the power supply card for carriage 1, the power supply card for carriage 2, the power supply card for carriage 3, and the power supply card for carriage 4). In some embodiments, the jumper information of each power supply card 102 has corresponding vehicle model information. The multiple power supply cards include: redundant first power supply card 1021 and second power supply card 1022, and the corresponding jumper information of the first power supply card 1021 and the second power supply card 1022 is the same. For example, the corresponding jumper information of the first power supply card 1021 and the second power supply card 1022 of the power supply card for carriage 1 is 10011, the corresponding jumper information of the first power supply card 1021 and the second power supply card 1022 of the power supply card for carriage 2 is 10101, the corresponding jumper information of the first power supply card 1021 and the second power supply card 1022 of the power supply card for carriage 3 is 11001, and the corresponding jumper information of the first power supply card 1021 and the second power supply card 1022 of the power supply card for carriage 4 is 01011.

[0052] The carriage control unit performs jumper information consistency verification based on the jumper information corresponding to the first power supply card 1021 and the jumper information corresponding to the second power supply card 1022. If the verification passes, it randomly selects one of the jumper information corresponding to the first power supply card 1021 and the jumper information corresponding to the second power supply card 1022 to determine the vehicle model information of the train carriage. For example: 10011 = business car, 10101 = economy car, 11001 = dining car, etc.

[0053] In some embodiments, the Ethernet switch further includes: an ECN (Ethernet Consist Network) board 103, which is used to collect the device information of at least one carriage device through the gateway device 104 of each train carriage and transmit the device information to the ETB communication bus. Carriage devices such as anti-skid devices, PLCs (Programmable Logic Controllers), doors, and air conditioners. The device information includes: device model, device code, and device status (running, idle, faulty, etc.). By transmitting the device information of the carriage devices to the ETB communication bus, each ETB board 101 (ETB node) in the ETB communication bus can share the above information. Thus, the human-machine interface of the target carriage can obtain and display the corresponding information.

[0054] In some embodiments, the car number, vehicle type information, and device information in the ETB communication bus are transmitted to a preset human-machine interface through the gateway device 104 of the target car. The human-machine interface displays the car number, vehicle type information, and device information in the form of a vehicle formation topology graph. The human-machine interface includes a confirmation button for locking the current vehicle formation topology. When the confirmation button is triggered, the vehicle formation topology is locked.

[0055] Specifically, the target car is usually the car equipped with the human-machine interface. The car number, vehicle type information, and device information constitute the vehicle formation topology. The target car obtains the car number, vehicle type information, and device information from the ETB communication bus through its gateway device 104, and displays the car number, vehicle type information, and device information in the form of a vehicle formation topology graph on the human-machine interface for relevant personnel to determine. When the relevant personnel trigger (press or touch) the confirmation button, the vehicle formation topology is locked, that is, the vehicle formation topology displayed on the current human-machine interface will no longer change until the train is powered on again. This avoids problems such as the re-identification of car numbers caused by some cars losing network connection during the train operation or during the train's acceleration, resulting in incorrect vehicle formation topologies. In this embodiment, after the vehicle formation topology is locked, even if some cars lose network connection during the train operation, the vehicle formation topology will not change, but the cars with network connection loss will be displayed in grayscale to inform relevant personnel that these cars have lost network connection, preventing abnormal initial operation and avoiding unnecessary impacts on the normal train operation order.

[0056] Moreover, the car number, vehicle type information, and device information in the vehicle formation topology displayed on the human-machine interface can provide monitoring references for relevant personnel. At the same time, the vehicle formation topology displayed on the human-machine interface can clearly display the fault information of the train car equipment, facilitating maintenance personnel to troubleshoot faults and accurately locate the faulty car or faulty device.

[0057] Please refer to Figure 4, the train flexible formation system provided in this embodiment includes multiple Ethernet switches as described in any one of the above. Each of the Ethernet switches is located in a corresponding train car to complete the flexible formation of the train. The multiple Ethernet switches are communicatively connected through an ETB communication bus. Specifically, the ETB boards 101 of each Ethernet switch are communicatively connected end to end to form an ETB communication bus. For example, the head ports X1 and X2 of the ETB board 101 are physically communicatively connected to the tail ports X3 and X4 of the adjacent left ETB board 101 respectively, and the tail ports X3 and X4 of the ETB board 101 are connected to the head ports X1 and X2 of the adjacent right ETB board 101 respectively to form an ETB communication bus. The Ethernet switch in each train car is communicatively connected to a corresponding gateway device 104. The gateway device 104 is connected to car equipment such as anti-skid devices, PLCs, doors, and air conditioners. The train flexible formation system in this embodiment can better realize the automatic numbering of train car numbers, and can better determine the car type information of each train car, fully meeting the requirements of the current rail vehicle (train) car flexible formation network adaptability, with a high degree of automation and strong feasibility.

[0058] The train flexible formation method provided by the present invention will be described below. The train flexible formation method described below can be mutually referred to with the train flexible formation system described above.

[0059] Please refer to Figure 5 , the train flexible formation method based on the Ethernet switch as described in any one of the above provided in this embodiment includes:

[0060] S501: When the train is initially powered on, use the Ethernet switch to determine the car number and car type information.

[0061] S502: Based on the car number and car type information, construct a whole train formation topology.

[0062] S503: Display the whole train formation topology on the human-machine interface of the target car.

[0063] S504: If the whole train formation topology is confirmed, lock the whole train formation topology until the train is powered on again. The train flexible formation method in this embodiment can better realize the automatic numbering of train car numbers, and can better determine the car type information of each train car, fully meeting the requirements of the current rail vehicle (train) car flexible formation network adaptability, with a high degree of automation, high flexibility, and low cost.

[0064] This embodiment also provides a train, including: multiple train cars, and an Ethernet switch as described in any one of the above. The Ethernet switch is arranged in the train car. Specifically, each train car is provided with a corresponding Ethernet switch.

[0065] The system embodiments described above are merely illustrative. 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, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0066] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An Ethernet switch, characterized in that, Including: An ETB board, and one or more power supply boards; The ETB board is used for head-to-tail communication connection with the ETB board of an adjacent Ethernet switch to form an ETB communication bus, and is used for sending communication information to the adjacent ETB board when the train is initially powered on to determine the number of carriages and the relative positions of the carriages, and based on the number of carriages and the relative positions of the carriages, determining the carriage numbers of each train carriage; The power supply board includes multiple groups of point combinations, and the connection states of the multiple groups of point combinations respectively correspond to corresponding jumper information. The power supply board is used for transmitting the jumper information to the ETB communication bus when the train is initially powered on. The jumper information is used to determine the vehicle type information of the train carriage, and the carriage numbers and vehicle type information in the ETB communication bus are displayed on a preset human-machine interface.

2. The Ethernet switch according to claim 1, characterized in that, The ETB board includes at least one head port and at least one tail port. The head port of any ETB board is communicatively connected to the tail port of an adjacent ETB board, and the tail port of the ETB board is communicatively connected to the head port of another adjacent ETB board to form the ETB communication bus.

3. The Ethernet switch according to claim 2, wherein The ETB board is specifically used for, when the train is initially powered on, sending communication information to an adjacent ETB board, determining a first transmission path of the communication information along the output direction of the head port, and a second transmission path of the communication information along the output direction of the tail port. Based on the first transmission path and the second transmission path, determining the number of carriages and the relative positions of the carriages, and based on the number of carriages, the relative positions of the carriages and a preset carriage numbering rule, determining the carriage numbers of each train carriage.

4. The Ethernet switch according to claim 3, characterized in that, The carriage numbering rule is: when the train head is at the tail of the first transmission path, along the transmission direction of the first transmission path, the carriage numbers corresponding to each ETB board decrease in sequence, and along the transmission direction of the second transmission path, the carriage numbers corresponding to each ETB board increase in sequence; When the train head is at the tail of the second transmission path, along the transmission direction of the first transmission path, the carriage numbers corresponding to each ETB board increase in sequence, and along the transmission direction of the second transmission path, the carriage numbers corresponding to each ETB board decrease in sequence.

5. The Ethernet switch according to claim 1, wherein Each group of the point combinations includes a positive potential and a negative potential, and the connection states of the positive potential and the negative potential of each group of the point combinations are short-circuited or idle; When the positive potential and the negative potential in the point combination are short-circuited, the jumper information corresponding to the point combination is a preset short-circuit value; When the connection state of the positive potential and the negative potential in the point combination is idle, the jumper information corresponding to the point combination is a preset idle value.

6. The Ethernet switch according to claim 1, characterized in that, The jumper information of each power supply board has corresponding vehicle type information. The multiple power supply boards include: a redundant first power supply board and a second power supply board, and the jumper information corresponding to the first power supply board and the second power supply board is the same.

7. The Ethernet switch according to claim 1, characterized in that, Further including: The ECN board is used to collect the device information of at least one car body device through the gateway device of each train car body and transmit the device information to the ETB communication bus.

8. The Ethernet switch according to claim 7, wherein The car body number, vehicle type information, and device information in the ETB communication bus are transmitted to a preset human-machine interaction interface through the gateway device of the target car body. The human-machine interaction interface displays the car body number, vehicle type information, and device information in the form of a whole train formation topology graph. The human-machine interaction interface includes a confirmation button for locking the current whole train formation topology. When the confirmation button is triggered, the whole train formation topology is locked.

9. A flexible train formation system, characterized in that, It includes a plurality of Ethernet switches as described in any one of claims 1-8. Each of the Ethernet switches is located in the corresponding train car body to complete the flexible formation of the train.

10. A train flexible formation method based on the Ethernet switch according to any one of claims 1-8, characterized in that, It includes: When the train is initially powered on, use the Ethernet switch to determine the car body number and vehicle type information; Based on the car body number and vehicle type information, construct a whole train formation topology; Display the whole train formation topology on the human-machine interaction interface of the target car body; If the whole train formation topology is confirmed, lock the whole train formation topology until the train is powered on again.

11. A train, characterized in that, It includes: A plurality of train car bodies and an Ethernet switch as described in any one of claims 1-8. The Ethernet switch is arranged in the train car body.

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