Trailer network control system and method for new type of centralized power EMU

Abstract

The invention discloses a novel trailer network control system and method for a centralized power train set. The trailer network control system comprises: a plurality of switch units, a plurality of integrated network node units, a monitoring terminal and a train-level host. The switch unit and the integrated network node unit are respectively arranged in each trailer and a dining and seating combined vehicle. The subsystem network data of the carriage where the carriage is located is received and summarized by the integrated network node unit, and the subsystem network data is hierarchically transmitted to the switch unit according to preset conditions. The monitoring terminal is arranged in the dining and seating combined vehicle, and receives and summarizes the subsystem network data through the switch unit. The train-level host is arranged in the dining and seating combined vehicle, and the train-level host receives the summarized subsystem network data output by the monitoring terminal to complete the train-level communication. The invention improves the transmission rate of data transmission, makes data transmission more scientific and effective, and makes the trailer network realize redundancy when the equipment is not redundant, so that the network control is more reliable and safe.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to a trailer network control system and method for a novel power-centralized EMU. Background Art

[0002] The existing trailer network control system of the centralized power EMU adopts the traditional Lonwoks network, which is divided into two-level network architectures: vehicle-level and train-level. The vehicle-level network sets up multiple communication terminals to interact with the network subsystem. The network communication nodes summarize the vehicle-level Lonworks communication data and forward the data to the train-level Lonworks bus. The vehicle-level communication data is summarized to the monitoring terminal and finally sent to the train-level host. Limited by the Lonworks transmission rate and half-duplex interaction mechanism, the network data transmission is slow, the delay is large, and the key equipment lacks redundancy, which affects the network reliability.

[0003] Therefore, it is urgent to develop a trailer network control system and method for a new type of power-concentrated EMU that overcomes the above-mentioned defects. Summary of the invention

[0004] In view of the above problems, the present invention provides a new type of trailer network control system for a power-centralized EMU, which includes:

[0005] A plurality of switch units are arranged in each trailer and dining table combination vehicle, and the plurality of switch units are connected via Ethernet;

[0006] A plurality of integrated network node units are arranged in each of the trailers and the dining and seating combined vehicle and are connected to the switch units of the respective carriages via Ethernet in a one-to-one correspondence, and the subsystem network data of the carriage where the subsystem network data is located is received and aggregated through the integrated network node units, and the subsystem network data is hierarchically transmitted to the switch units according to preset conditions;

[0007] A monitoring terminal is arranged in the dining and seating vehicle, connected to the switch unit in the vehicle compartment through Ethernet, and receives and summarizes the subsystem network data through the switch unit;

[0008] The train-level host is arranged in the dining and seating vehicle and is connected to the switch unit in the carriage via Ethernet. The train-level host is also electrically connected to the monitoring terminal. The train-level host receives the aggregated subsystem network data output by the monitoring terminal to complete the train-level communication.

[0009] The above-mentioned trailer network control system, wherein each of the integrated network node units comprises:

[0010] A control panel communication module is connected to the power supply system and the carriage monitoring screen of the carriage through an RS232 bus. The control panel communication module is also connected to the undercarriage power supply device of the carriage through a Lonwoks network. The control panel communication module collects subsystem network data of the power supply system, the carriage monitoring screen and the undercarriage power supply device.

[0011] The first subsystem communication module is connected to the axle temperature system or the axle temperature system and the insulation detection system of the compartment through the RS485 bus, and the first subsystem communication module collects the subsystem network data of the axle temperature system, or the first subsystem communication module collects the subsystem network data of the axle temperature system and the insulation detection system;

[0012] A second subsystem communication module is connected to the anti-skid device of the compartment through an RS232 bus, and the second subsystem communication module is also connected to the pyrotechnic system of the compartment through an RS485 bus, and the second subsystem communication module collects the subsystem network data of the anti-skid device and the pyrotechnic system;

[0013] A third subsystem communication module is connected to the sliding plug door of the compartment through an RS485 bus, and the third subsystem communication module collects the subsystem network data of the sliding plug door;

[0014] The subsystem network data processing module sets a mark for each subsystem network data according to a preset condition, and outputs all the subsystem network data after sorting them according to the mark.

[0015] The above-mentioned trailer network control system, wherein the mark includes a type mark and a time mark, and the preset conditions include: setting the subsystem network data that affects driving safety to a Class A mark, setting the monitoring data to a Class B mark, and setting the communication node monitoring data of other trailers to a Class C mark, and the subsystem network data processing module sorts all the subsystem network data according to the Class A mark, Class B mark, Class C mark and time mark and outputs them.

[0016] The above-mentioned trailer network control system, among others, also includes: a passenger information control unit, which is arranged in the dining and seating combined vehicle and connected to the switch unit in the carriage where it is located via Ethernet. The passenger information control unit receives the attribute information of the integrated network node unit and the monitoring terminal and maintains the global network node index information. When the monitoring terminal fails, the passenger information control unit receives the subsystem network data through the switch unit and outputs it to the train-level host to complete the train-level communication.

[0017] The above-mentioned trailer network control system, wherein each of the integrated network node units receives attribute information of other integrated network node units, the passenger information control unit and the monitoring terminal and maintains global network node index information. When the monitoring terminal and the passenger information control unit fail, one of the integrated network node units is determined according to a preset priority to receive the subsystem network data through the switch unit and output it to the train-level host to complete the train-level communication.

[0018] The present invention also provides a novel trailer network control method for a power-centralized EMU, which includes:

[0019] Data collection steps: receiving and summarizing the subsystem network data of the carriage where the integrated network node unit is located;

[0020] Data hierarchical transmission step: hierarchically transmitting the subsystem network data to the switch unit according to preset conditions through the integrated network node unit;

[0021] Data monitoring step: receiving the subsystem network data output by the switch unit through the monitoring terminal, and aggregating the subsystem network data through the monitoring terminal and outputting it to the train-level host to complete the train-level communication.

[0022] In the above trailer network control method, the data collection step includes:

[0023] Collect the subsystem network data of the power supply system in the carriage, the carriage monitoring screen and the power supply device under the carriage through the control board communication module;

[0024] Collect the subsystem network data of the axle temperature system of the compartment through the first subsystem communication module, or collect the subsystem network data of the axle temperature system and the insulation detection system through the first subsystem communication module;

[0025] Collecting the subsystem network data of the anti-skid device and the pyrotechnic system of the carriage through the second subsystem communication module;

[0026] The subsystem network data of the sliding door in the carriage is collected through the third subsystem communication module.

[0027] In the above trailer network control method, the step of hierarchical data transmission includes:

[0028] By means of the subsystem network data processing module, a mark is set for each of the subsystem network data according to a preset condition, and all the subsystem network data are sorted according to the mark and then output;

[0029] Among them, the mark includes a type mark and a time mark, and the preset conditions include: setting the subsystem network data that affects driving safety to a Class A mark, setting the monitoring data to a Class B mark, and setting the communication node monitoring data of other trailers to a Class C mark. The subsystem network data processing module sorts all the subsystem network data according to the Class A mark, Class B mark, Class C mark and time mark and outputs them.

[0030] In the above trailer network control method, the data monitoring step further comprises:

[0031] The passenger information control unit receives the attribute information of the integrated network node unit and the monitoring terminal and maintains the global network node index information. When the monitoring terminal fails, the passenger information control unit receives the subsystem network data through the switch unit and outputs it to the train-level host to complete the train-level communication.

[0032] In the above trailer network control method, the data monitoring step further comprises:

[0033] Each of the integrated network node units receives attribute information of other integrated network node units, the passenger information control unit and the monitoring terminal and maintains global network node index information. When the monitoring terminal and the passenger information control unit fail, one of the integrated network node units is determined according to a preset priority to receive the subsystem network data through the switch unit and output it to the train-level host to complete train-level communication.

[0034] The present invention has the following advantages compared with the prior art:

[0035] Through the present invention, the vehicle network equipment is changed from the existing distributed management to centralized modular management, which greatly improves the transmission rate of the vehicle network; the hierarchical transmission of network data optimizes the train network transmission mechanism, and the trailer data feedback is more timely and effective; the key equipment software functions are dynamically specified to ensure the communication control safety between the trailer and the locomotive.

[0036] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a structural schematic diagram of the trailer network control system of the present invention;

[0039] Figure 2 for Figure 1 A schematic diagram of the structure of the integrated network node unit;

[0040] Figure 3 A schematic diagram for data hierarchical transmission;

[0041] Figure 4 Schematic diagram of the train-level attribute information exchanged among all nodes;

[0042] Figure 5 It is a flow chart of the trailer network control method of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. In addition, elements / components with the same or similar reference numerals used in the drawings and embodiments are used to represent the same or similar parts.

[0045] The terms “first”, “second”, “S1”, “S2”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit the present invention. They are only used to distinguish elements or operations described with the same technical terms.

[0046] The directional terms used in this document, such as up, down, left, right, front or back, etc., are only used to refer to the directions of the drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0047] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0048] As used herein, "and / or" includes any or all combinations of the items described.

[0049] As used herein, “plurality” includes “two” and “more than two”; as used herein, “plurality of groups” includes “two groups” and “more than two groups”.

[0050] The terms "substantially" and "approximately" used herein are used to modify any quantity or error that may vary slightly, but these slight changes or errors do not change their essence. Generally speaking, the range of slight changes or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. Those skilled in the art should understand that the aforementioned values ​​can be adjusted according to actual needs and are not limited thereto.

[0051] Certain terms used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of the present application.

[0052] Please refer to Figure 1 , Figure 1 FIG. 1 is a schematic diagram of the structure of the trailer network control system of the present invention. Figure 1 As shown, a new type of trailer network control system of a power-concentrated EMU of the present invention comprises: a plurality of switch units 11, 12, 13, a plurality of integrated network node units 21, 22, 23, a monitoring terminal 3 and a train-level host 4, the switch units 11, 12, 13 are arranged in each trailer T and the dining and seating combined vehicle C, and the plurality of switch units 11, 12, 13 are connected through Ethernet; the integrated network node units 21, 22, 23 are arranged in each trailer T and the dining and seating combined vehicle C and are connected to the switch units 11, 12, 13 of their respective carriages through Ethernet one by one, and the integrated network node units 21, 22, 23 receive and aggregate the information received from the integrated network node units 21, 22, 23. The subsystem network data of the car where it is located is obtained, and the subsystem network data is graded and transmitted to the switch unit 12 in the dining and seating combined car C according to preset conditions; the monitoring terminal 3 is arranged in the dining and seating combined car C, and is connected to the switch unit 12 in the car where it is located through Ethernet, and the monitoring terminal 3 receives and summarizes the subsystem network data through the switch unit 12; the train-level host 4 is arranged in the dining and seating combined car C, and is connected to the switch unit 12 in the car where it is located through Ethernet, and the train-level host 4 is also electrically connected to the monitoring terminal 3, and the train-level host 4 receives the subsystem network data summarized by the monitoring terminal 3 to complete the train-level communication.

[0053] Please refer to Figure 2 , Figure 2 for Figure 1 The structural diagram of the integrated network node unit is shown in Figure 1. Figure 2 As shown, each of the integrated network node units 21, 22, 23 includes:

[0054] The control panel communication module J1 is connected to the power supply system and the carriage monitoring screen of the carriage through the RS232 bus. The control panel communication module is also connected to the undercarriage power supply device of the carriage through the Lonwoks network. The control panel communication module collects the subsystem network data of the power supply system, the carriage monitoring screen and the undercarriage power supply device;

[0055] The first subsystem communication module J2 is connected to the axle temperature system or the axle temperature system and the insulation detection system of the compartment through the RS485 bus, and the first subsystem communication module collects the subsystem network data of the axle temperature system, or the first subsystem communication module collects the subsystem network data of the axle temperature system and the insulation detection system;

[0056] The second subsystem communication module J3 is connected to the anti-skid device of the compartment through the RS232 bus. The second subsystem communication module is also connected to the pyrotechnic system of the compartment through the RS485 bus. The second subsystem communication module collects the subsystem network data of the anti-skid device and the pyrotechnic system.

[0057] The third subsystem communication module J4 is connected to the sliding plug door of the compartment through the RS485 bus, and the third subsystem communication module collects the subsystem network data of the sliding plug door;

[0058] The subsystem network data processing module J5 sets a mark for each of the subsystem network data according to a preset condition, and sorts all of the subsystem network data according to the mark and then outputs them.

[0059] Among them, the mark includes a type mark and a time mark, and the preset conditions include: setting the subsystem network data that affects driving safety to a Class A mark, setting the monitoring data to a Class B mark, and setting the communication node monitoring data of other trailers to a Class C mark. The subsystem network data processing module sorts all the subsystem network data according to the Class A mark, Class B mark, Class C mark and time mark and outputs them.

[0060] Therefore, the present invention integrates distributed communication terminals to form an integrated network node unit, the subsystem retains the existing mode communication, and each module aggregates the subsystem network data into the subsystem network data processing module J5 through the backplane bus for processing, thereby canceling the original vehicle Lonwoks network, that is, canceling the vehicle-level bus, and using Ethernet bus transmission at the train level, thereby reducing the existing vehicle-level network delay and improving the data communication bandwidth.

[0061] Please refer to Figure 3 , Figure 3 This is a schematic diagram of data transmission in stages. Figure 3 As shown, in this embodiment, subsystem network data is transmitted in a hierarchical manner. According to the importance and urgency of the subsystem network data, the subsystem network data is divided into Class A data, such as door, loop, fire alarm and other data affecting driving safety; Class B data, such as status, temperature, value and other monitoring data; and Class C data, such as monitoring data of other vehicle communication nodes.

[0062] The specific instructions are as follows:

[0063] Class A data processing method, subsystem network data processing module J5 detects changes in sensitive variables, encapsulates the changed variables in the form of variable type, length and value into network data, sets the sent task time as the current time mark, adds tag A, and pushes it into the sending structure;

[0064] Class B data processing method, subsystem network data processing module J5 starts the periodic sending time timer. After the timer times out, subsystem network data processing module J5 encapsulates the fixed data into network data, sets the sending task time as the current time mark, adds the mark B, and pushes it into the sending structure;

[0065] C-type data processing method, after the subsystem network data processing module J5 receives the monitoring request from other communication nodes, the subsystem network data processing module J5 encapsulates its own vehicle status into network data, sets the task time to be sent as the current time mark, adds the mark C, and pushes it into the sending structure;

[0066] Before sending data, the subsystem network data processing module J5 re-sorts the data in the sending structure according to the type tags A, B, C and the current time tag in the sending task, and finally completes the data queue to be sent. The subsystem network data processing module J5 sends it to the train network according to the priority of A→B→C and the same type tag, with the current time tag in front.

[0067] Please refer to Figure 4 Combined with Figure 1 , Figure 4 It is a schematic diagram of all nodes interacting with each other in terms of train-level attribute information. Figure 4 As shown, the trailer network control system of the present invention also includes: a passenger information control unit 5, which is arranged in the dining and seating vehicle C and is connected to the switch unit 12 of the carriage where it is located via Ethernet. The passenger information control unit 5 receives the attribute information of the integrated network node units 21, 22, 23 and the monitoring terminal 3 and maintains the global network node index information. When the monitoring terminal fails, the passenger information control unit 5 receives the subsystem network data through the switch unit 12 and outputs it to the train-level host 4 to complete the train-level communication.

[0068] Furthermore, each of the integrated network node units 21, 22, 23 receives attribute information of other integrated network node units, the passenger information control unit 5 and the monitoring terminal 3 and maintains global network node index information. When the monitoring terminal 3 and the passenger information control unit 5 fail, one of the integrated network node units is determined according to a preset priority to receive the subsystem network data through the switch unit and output it to the train-level host 4 to complete the train-level communication.

[0069] Specifically, the monitoring terminal 3 is responsible for collecting the subsystem network data of all integrated network node units and sending control instructions to the integrated network node units, and summarizing the information of all integrated network node units to the train host 4 (TCDS). Therefore, once the monitoring terminal fails, the locomotive will not be able to collect the trailer network data. It plays a key role in the entire trailer network, but there is no redundant design in the hardware. For this reason, the train-level master control function is designed as a dynamic designation mechanism in software. The designation method is as follows:

[0070] The integrated network node unit, monitoring terminal, and passenger information control unit are architecturally divided into two basic communication functions, namely vehicle-level communication function and train-level communication function. The vehicle-level communication function is mainly responsible for communication with the subsystem within the car, and the train-level passenger information control unit function is mainly responsible for uploading local subsystem data and communicating with the train-level host, completing the train's monitoring function of the vehicle.

[0071] After being powered on, the integrated network node unit, monitoring terminal, and passenger information control unit start the communication function with the vehicle-level network subsystem to ensure the monitoring of the vehicle's internal communication subsystem. The train-level communication function obtains the function of the train-level master control through the principle of a dynamic election mechanism;

[0072] The monitoring terminal and the passenger information control unit are located in the same carriage, and the priorities of the communication rights with the train-level host are set to 1 and 2 respectively. The priorities of other integrated network node units can be assigned in sequence according to the carriage number information. In this embodiment, the smaller the carriage number, the higher the priority of the integrated network node unit is, which is a better implementation method;

[0073] After power-on, the integrated network node unit, monitoring terminal, and passenger information control unit start the attribute sending timer and regularly send their own attribute information, including the car number, device type, and default priority. At this stage, the train-level network only has device attribute information; the integrated network node unit, monitoring terminal, and passenger information control unit maintain global network node index information in each device by receiving attribute information from other devices (monitoring terminal, passenger information control unit, and integrated network node unit). At this stage, the train network only has attribute information; the integrated network node unit, monitoring terminal, and passenger information control unit compare the index information, and the node device with the highest priority obtains the train-level master control right, communicates with the train host 4, and notifies other network node devices through the train-level network, and waits for confirmation from other network node devices;

[0074] Among them, if the selected node device receives node attribute information with a higher priority during operation, the node device will automatically exit the communication with the train host 4 and restore to the original communication level; the unselected node device starts the detection timer, and if the heartbeat signal of the train host 4 is not obtained within the specified time, a new round of dynamic designation mechanism will be started.

[0075] In other words, the present invention first presets that the priority of monitoring terminal 3 is the highest. When the attribute information of monitoring terminal 3 is always in the index information, monitoring terminal 3 will always summarize the subsystem network data and output it to the train-level host to complete the train-level communication; when the attribute information of monitoring terminal 3 is not in the index information, that is, monitoring terminal 3 fails, the subsystem network data will be summarized and output to the train-level host through the passenger information control unit with the next highest priority to complete the train-level communication; if the attribute information of the passenger information control unit is not in the index information, the subsystem network data will be summarized and output to the train-level host according to an integrated network node unit with the smallest car number to complete the train-level communication; and so on.

[0076] It should be noted that the present invention does not limit the number of trailers. In practice, the designer can increase or decrease the number of trailers according to demand, and correspondingly increase or decrease the number of switch units and integrated network node units.

[0077] Please refer to Figure 5 , Figure 5 FIG. 1 is a flow chart of the trailer network control method of the present invention. Figure 5 As shown, a novel trailer network control method of a power-concentrated EMU of the present invention comprises:

[0078] Data collection step S1: receiving and summarizing the subsystem network data of the carriage where the integrated network node unit is located;

[0079] Data hierarchical transmission step S2: hierarchically transmitting the subsystem network data to the switch unit according to preset conditions through the integrated network node unit;

[0080] Data monitoring step S3: receiving the subsystem network data output by the switch unit through the monitoring terminal, and aggregating the subsystem network data through the monitoring terminal and outputting it to the train-level host to complete the train-level communication.

[0081] Wherein, the data collection step S1 includes:

[0082] Collect the subsystem network data of the power supply system in the carriage, the carriage monitoring screen and the power supply device under the carriage through the control board communication module;

[0083] Collect the subsystem network data of the axle temperature system of the compartment through the first subsystem communication module, or collect the subsystem network data of the axle temperature system and the insulation detection system through the first subsystem communication module;

[0084] Collecting the subsystem network data of the anti-skid device and the pyrotechnic system of the carriage through the second subsystem communication module;

[0085] The subsystem network data of the sliding door in the carriage is collected through the third subsystem communication module.

[0086] Furthermore, the data hierarchical transmission step S2 includes:

[0087] By means of the subsystem network data processing module, a mark is set for each of the subsystem network data according to a preset condition, and all the subsystem network data are sorted according to the mark and then output;

[0088] Among them, the mark includes a type mark and a time mark, and the preset conditions include: setting the subsystem network data that affects driving safety to a Class A mark, setting the monitoring data to a Class B mark, and setting the communication node monitoring data of other trailers to a Class C mark. The subsystem network data processing module sorts all the subsystem network data according to the Class A mark, Class B mark, Class C mark and time mark and outputs them.

[0089] Furthermore, the data monitoring step S3 also includes:

[0090] The passenger information control unit receives the attribute information of the integrated network node unit and the monitoring terminal and maintains the global network node index information. When the monitoring terminal fails, the passenger information control unit receives the subsystem network data through the switch unit and outputs it to the train-level host to complete the train-level communication; and

[0091] Each of the integrated network node units receives attribute information of other integrated network node units, the passenger information control unit and the monitoring terminal and maintains global network node index information. When the monitoring terminal and the passenger information control unit fail, a passenger information control unit is determined according to a preset priority to receive the subsystem network data through the switch unit and output it to the train-level host, thereby completing train-level communication.

[0092] In summary, the present invention reduces the number of network devices, eliminates the vehicle-level bus, improves the transmission rate of data transmission, makes data transmission more scientific and effective, and enables the trailer network to achieve redundant design of monitoring terminals through integrated network node units and passenger information control units when the equipment is not redundant, making network control more reliable and safe.

[0093] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions 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. A new type of trailer network control system for a centralized power train, characterized in that: include: A plurality of switch units are arranged in each trailer and dining table combination vehicle, and the plurality of switch units are connected via Ethernet; A plurality of integrated network node units are arranged in each of the trailers and the dining and seating combined vehicle and are connected to the switch units of the respective carriages via Ethernet in a one-to-one correspondence, and the subsystem network data of the carriage where the subsystem network data is located is received and aggregated through the integrated network node units, and the subsystem network data is hierarchically transmitted to the switch units according to preset conditions; A monitoring terminal is arranged in the dining and seating vehicle, connected to the switch unit in the vehicle compartment through Ethernet, and receives and summarizes the subsystem network data through the switch unit; A train-level host is arranged in the dining and seating vehicle, connected to the switch unit in the carriage where it is located via Ethernet, and the train-level host is also electrically connected to the monitoring terminal. The train-level host receives the aggregated subsystem network data output by the monitoring terminal to complete train-level communication; A passenger information control unit is arranged in the dining and seating combined vehicle and connected to the switch unit in the carriage where the passenger information control unit is located through Ethernet. The passenger information control unit receives the attribute information of the integrated network node unit and the monitoring terminal and maintains the global network node index information. When the monitoring terminal fails, the passenger information control unit receives the subsystem network data through the switch unit and outputs it to the train-level host to complete the train-level communication. Among them, each of the integrated network node units receives attribute information of other integrated network node units, the passenger information control unit and the monitoring terminal and maintains global network node index information. When the monitoring terminal and the passenger information control unit fail, one of the integrated network node units is determined according to a preset priority to receive the subsystem network data through the switch unit and output it to the train-level host to complete the train-level communication.

2. The trailer network control system according to claim 1, characterized in that: Each of the integrated network node units comprises: A control panel communication module is connected to the power supply system and the carriage monitoring screen of the carriage through an RS232 bus. The control panel communication module is also connected to the undercarriage power supply device of the carriage through a Lonwoks network. The control panel communication module collects subsystem network data of the power supply system, the carriage monitoring screen and the undercarriage power supply device. The first subsystem communication module is connected to the axle temperature system or the axle temperature system and the insulation detection system of the compartment through the RS485 bus, and the first subsystem communication module collects the subsystem network data of the axle temperature system, or the first subsystem communication module collects the subsystem network data of the axle temperature system and the insulation detection system; A second subsystem communication module is connected to the anti-skid device of the compartment through an RS232 bus, and the second subsystem communication module is also connected to the pyrotechnic system of the compartment through an RS485 bus, and the second subsystem communication module collects the subsystem network data of the anti-skid device and the pyrotechnic system; A third subsystem communication module is connected to the sliding plug door of the compartment through an RS485 bus, and the third subsystem communication module collects the subsystem network data of the sliding plug door; The subsystem network data processing module sets a mark for each subsystem network data according to a preset condition, and outputs all the subsystem network data after sorting them according to the mark.

3. The trailer network control system according to claim 2, characterized in that: The tag includes a type tag and a time tag. The preset conditions include: setting the subsystem network data that affects driving safety to a Class A tag, setting the monitoring data to a Class B tag, and setting the communication node monitoring data of other trailers to a Class C tag. The subsystem network data processing module sorts all the subsystem network data according to the Class A tag, Class B tag, Class C tag and time tag and then outputs them.

4. A new type of trailer network control method for a centralized power train, characterized in that: include: Data collection steps: receiving and summarizing the subsystem network data of the carriage where the integrated network node unit is located; Data hierarchical transmission step: hierarchically transmitting the subsystem network data to the switch unit according to preset conditions through the integrated network node unit; Data monitoring step: receiving the subsystem network data output by the switch unit through the monitoring terminal, and aggregating the subsystem network data through the monitoring terminal and outputting it to the train-level host to complete the train-level communication; The data monitoring step further comprises: The passenger information control unit receives the attribute information of the integrated network node unit and the monitoring terminal and maintains the global network node index information. When the monitoring terminal fails, the passenger information control unit receives the subsystem network data through the switch unit and outputs it to the train-level host to complete the train-level communication; and Each of the integrated network node units receives attribute information of other integrated network node units, the passenger information control unit and the monitoring terminal and maintains global network node index information. When the monitoring terminal and the passenger information control unit fail, one of the integrated network node units is determined according to a preset priority to receive the subsystem network data through the switch unit and output it to the train-level host to complete train-level communication.

5. The trailer network control method according to claim 4, characterized in that: The data collection step comprises: Collect the subsystem network data of the power supply system in the carriage, the carriage monitoring screen and the power supply device under the carriage through the control board communication module; Collect the subsystem network data of the axle temperature system of the compartment through the first subsystem communication module, or collect the subsystem network data of the axle temperature system and the insulation detection system through the first subsystem communication module; Collecting the subsystem network data of the anti-skid device and the pyrotechnic system of the carriage through the second subsystem communication module; The subsystem network data of the sliding door in the carriage is collected through the third subsystem communication module.

6. The trailer network control method according to claim 5, characterized in that: The step of hierarchical data transmission comprises: By means of the subsystem network data processing module, a mark is set for each of the subsystem network data according to a preset condition, and all the subsystem network data are sorted according to the mark and then output; Among them, the mark includes a type mark and a time mark, and the preset conditions include: setting the subsystem network data that affects driving safety to a Class A mark, setting the monitoring data to a Class B mark, and setting the communication node monitoring data of other trailers to a Class C mark. The subsystem network data processing module sorts all the subsystem network data according to the Class A mark, Class B mark, Class C mark and time mark and outputs them.

Images