CN118250156A - Vehicle-mounted network diagnosis system - Google Patents

Abstract

The application discloses a vehicle-mounted network diagnosis system. The on-vehicle network diagnosis system includes: the MVB acquisition equipment is connected with an MVB network and an ECN bus of the train and is used for acquiring network data of the MVB network in real time; the MVB edge computing device is connected with the ECN bus and used for acquiring network data acquired by the MVB acquisition device from the ECN bus and diagnosing the state of the MVB network based on the network data. According to the embodiment of the application, the network data of the train MVB network can be acquired in real time and diagnosed online in real time, and the real-time performance of the vehicle-mounted network diagnosis is improved, so that the diagnosis rationality of the vehicle-mounted network is improved.

Description

Vehicle-mounted network diagnosis system

Technical Field

The application relates to the technical field of information processing, in particular to a vehicle-mounted network diagnosis system.

Background

The train communication network (Train Communication Network, TCN) is a data communication network that communicates control, monitoring and diagnostic information between rail vehicles and within the vehicle. The bus structure of the TCN network may include a vehicle-level multifunctional vehicle bus (Multifunction Vehicle Bus, MVB). The MVB network is a bus topology and has the advantages of strong real-time performance, high response speed, high reliability and the like.

However, there is an unreasonable place in the related art for diagnosis of the on-vehicle network.

Disclosure of Invention

The embodiment of the application provides a vehicle-mounted network diagnosis system which can collect network data of a train MVB network in real time and diagnose the network data on line in real time, and improve the real-time performance of vehicle-mounted network diagnosis, thereby improving the diagnosis rationality of the vehicle-mounted network.

The embodiment of the application provides a vehicle-mounted network diagnosis system, which comprises: the MVB acquisition equipment is connected with an MVB network and an ECN bus of the train and is used for acquiring network data of the MVB network in real time; the MVB edge computing device is connected with the ECN bus and used for acquiring network data acquired by the MVB acquisition device from the ECN bus and diagnosing the state of the MVB network based on the network data.

In one possible embodiment, a plurality of MVB acquisition devices are located in different cars of a train, respectively;

And/or the MVB acquisition device and the MVB edge computing device are located in different cars of the train.

In one possible implementation, the MVB acquisition device includes a first processor, a first ethernet circuit, a first portal, a first ADC chip, a first bus transceiver, a first connector;

the first processor is connected with a first network port through a first Ethernet circuit, and the first network port is connected with the ECN bus;

The first ADC chip is connected with the first connector and the first processor;

the first bus transceiver is connected with the first connector and the first processor;

the first connector is connected to the MVB network.

In one possible implementation, the MVB edge computing device includes a backplane board, a central processor board, a wireless communication board, a memory board, and a power board;

the CPU board card communicates with the memory board card, the power board card and the wireless communication board card through the back board card.

In one possible implementation, the backboard board card comprises a plurality of second connectors, and the second connectors are respectively connected with the central processing unit board card, the storage board card, the power board card and the wireless communication board card;

Communication wires are arranged among the plurality of second connectors;

And a power supply wiring is arranged between the second connector connected with the power supply board and other second connectors.

In one possible implementation, the central processing unit board comprises a second processor, a second ethernet circuit, a second port, a driving circuit, and a third connector;

the second processor is connected with a second network port through a second Ethernet circuit, and the second network port is connected with the ECN bus;

the second processor is connected with the third connector through the driving circuit;

The third connector is connected with the second connector of the backboard board card.

In one possible implementation, the wireless communication board card includes a third processor, a wireless communication chip, a third ethernet circuit, and a fourth connector;

The third processor is connected with the wireless communication chip, and the wireless communication chip is connected to the SMA connector;

the third processor is connected with the fourth connector through a third Ethernet circuit;

The fourth connector is connected with the second connector of the backboard board card.

In one possible implementation, the memory card includes a solid state disk, a hard disk interface, and a fifth connector;

the hard disk interface is connected with the solid state disk and the fifth connector;

the fifth connector is connected with the second connector of the backboard board card.

In one possible implementation manner, the power board comprises an input interface, a protection circuit, a power conversion module, a singlechip and a sixth connector;

the input interface is connected with the input end of the power conversion module through the protection circuit, and the output end of the power conversion module is connected with the sixth connector;

the singlechip is connected with the power supply conversion module and the sixth connector;

The sixth connector is connected with the second connector of the backboard board card.

In one possible implementation, the MVB acquisition device and the MVB edge computing device are located in different cars of the train;

The MVB edge computing device also comprises an MVB board card;

The MVB board card comprises a fourth processor, a fourth Ethernet circuit, a third network port, a seventh connector, a second ADC chip, a second bus transceiver, a fifth Ethernet circuit and an eighth connector;

The fourth processor is connected with the third network port through a fourth Ethernet circuit;

the second ADC chip is connected with the seventh connector and the fourth processor;

the second bus transceiver is connected with the seventh connector and the fourth processor;

the seventh connector is connected with the MVB network;

the fourth processor is connected with the eighth connector through a fifth Ethernet circuit;

the eighth connector is connected with the second connector of the backboard board card.

The vehicle-mounted network diagnosis system provided by the embodiment of the application can monitor, record and analyze the MVB network information of the train in real time, and diagnose faults and health states of the MVB network of the train in real time on line, thereby improving the real-time performance of vehicle-mounted network diagnosis and the diagnosis rationality of the vehicle-mounted network.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar features, and in which the figures are not to scale.

Fig. 1 shows a schematic topology of an on-board network diagnosis system according to an embodiment of the present application;

fig. 2 shows a schematic architecture diagram of MVB acquisition equipment in a vehicle-mounted network diagnosis system according to an embodiment of the present application;

fig. 3 is a schematic diagram of a backboard board card in a vehicle-mounted network diagnosis system according to an embodiment of the present application;

Fig. 4 is a schematic diagram of architecture of a cpu board in a vehicle-mounted network diagnostic system according to an embodiment of the present application;

fig. 5 shows a schematic architecture diagram of an algorithm program in a vehicle-mounted network diagnosis system according to an embodiment of the present application;

Fig. 6 shows a schematic architecture diagram of a wireless communication board in a vehicle-mounted network diagnosis system according to an embodiment of the present application;

fig. 7 is a schematic diagram of a memory board card in a vehicle-mounted network diagnosis system according to an embodiment of the present application;

fig. 8 shows a schematic architecture diagram of a power board in a vehicle-mounted network diagnosis system according to an embodiment of the present application;

fig. 9 shows a schematic diagram of an MVB board in a vehicle-mounted network diagnosis system according to an embodiment of the present application.

Reference numerals illustrate:

10. MVB acquisition equipment;

11. A first processor; 12. a first ethernet circuit; 13. a first portal; 14. a first ADC chip; 15. a first bus transceiver; 16. a first connector;

20. MVB edge computing devices;

21. A backboard board card;

211. A second connector;

22. A central processing unit board card;

221. A second processor; 222. a second ethernet circuit; 223. a second portal; 224. a driving circuit; 225. a third connector;

23. A wireless communication board card;

231. A third processor; 232. a wireless communication chip; 233. a third ethernet circuit; 234. a fourth connector;

24. A memory board card;

241. a solid state disk; 242. a hard disk interface; 243. a fifth connector;

25. A power supply board;

251. An input interface; 252. a protection circuit; 253. a power conversion module; 254. a single chip microcomputer; 255. a sixth connector;

26. MVB board card;

261. A fourth processor; 262. a fourth ethernet circuit; 263. a third portal; 264. a seventh connector; 265. a second ADC chip; 266. a second bus transceiver; 267. a fifth ethernet circuit; 268. and an eighth connector.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the application and are not configured to limit the application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

It will be understood that when an element is referred to as being "connected" or "electrically connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Accordingly, it is intended that the present application covers the modifications and variations of this application provided they come within the scope of the appended claims (the claims) and their equivalents. The embodiments provided by the embodiments of the present application may be combined with each other without contradiction.

As described in the background art, there is an unreasonable place in the related art for diagnosis of an on-vehicle network.

For example, diagnosis of an on-vehicle network in the related art has the following problems:

1. The existing MVB network data recording apparatus mainly works above the link layer of the MVB network, so only process data, message data, and monitoring data transmitted over the network can be recorded; and based on this data, record and analyze data and events on the locomotive network. The scheme can not record the data state on the bus, and can not locate fault data, waveforms and equipment, so that fault location is affected, and the efficiency of monitoring faults of rolling stock is greatly reduced.

2. The existing MVB data recording device stores the acquired data in a local hard disk of the equipment, and an maintainer gets on the vehicle to derive original acquired data from the hard disk, and then takes the data to a ground server for algorithm analysis. When communication abnormality occurs, the approximate estimation can be carried out only by searching the data in the corresponding time period after the occurrence, and the real-time performance is not realized.

3. The existing MVB network analyzer equipment stores the acquired data in a local hard disk of the equipment, an maintainer gets on the bus to connect the equipment to PTU upper computer software in a notebook computer, and the original data is read from the hard disk for algorithm analysis. The failure occurrence cause cannot be positioned and analyzed in the first time by the scheme, and the time of an maintainer is occupied.

4. After the original data is acquired, the original data is processed and analyzed by a processor through an existing MVB network analyzer device, and information such as a diagnosis result is displayed through a touch screen arranged outside the device, so that a user can check the information on site. The train MVB network health state can be checked only when an maintainer gets on the train to check the equipment, and network faults which occur early can be found only after a period of time, so that the maintenance progress is influenced.

To solve at least one of the above-mentioned technical problems, embodiments of the present application provide an on-vehicle network diagnosis system, and various embodiments of the on-vehicle network diagnosis system will be described below with reference to the accompanying drawings.

As shown in fig. 1, the vehicle-mounted network diagnosis system provided by the embodiment of the application includes an MVB acquisition device 10 and an MVB edge calculation device 20.

The MVB acquisition device 10 and the MVB edge computing device 20 are both connected to an ethernet fixed network (ETHERNET TRAIN consist network, ECN) bus of the train, so that the MVB acquisition device 10 and the MVB edge computing device 20 can implement data interaction through the ECN bus. For example, both MVB acquisition device 10 and MVB edge computing device 20 access the train ECN bus via ethernet lines.

The MVB acquisition device 10 is further connected to an MVB network (MVB network may be understood as an MVB bus) of the train, and the MVB acquisition device 10 is configured to acquire network data of the MVB network in real time.

The MVB acquisition device 10 may collect the acquired MVB network data to the MVB edge computing device 20 through the ECN bus, where the MVB edge computing device 20 is configured to acquire the network data acquired by the MVB acquisition device 10 from the ECN bus, and diagnose the health status of the MVB network based on the network data.

The vehicle-mounted network diagnosis system provided by the embodiment of the application can monitor, record and analyze the MVB network information of the train in real time, and diagnose faults and health states of the MVB network of the train in real time on line, thereby improving the real-time performance of vehicle-mounted network diagnosis and the diagnosis rationality of the vehicle-mounted network.

In some embodiments, as shown in fig. 1, a plurality of MVB acquisition devices 10 are located in different cars of a train, respectively; and/or MVB acquisition device 10 and MVB edge computing device 20 may be located in different cars of a train.

The train can include a plurality of carriages, and different carriages have different MVB network segments, and the quantity of MVB acquisition equipment 10 also can include a plurality of, and a plurality of MVB acquisition equipment 10 are located different carriages respectively, can gather the network data of different MVB network segments like this to improve data acquisition's comprehensiveness. In addition, the MVB edge computing device 20 may also be configured to have a function of collecting MVB network data of the car in which it is located, so that the MVB edge computing device 20 may not need to be further configured with the MVB collecting device 10.

The MVB acquisition equipment is of an independent structure, can be deployed and installed in different carriages, acquires train MVB network data in real time, and can communicate with MVB edge computing equipment through a train ECN bus.

In some embodiments, as shown in fig. 2, MVB acquisition device 10 may include a first processor 11, a first ethernet circuit 12, a first portal 13, a first ADC chip (AnalogTo DIGITAL CHIP, analog-to-digital conversion chip) 14, a first bus transceiver 15, and a first connector 16.

The first processor 11 is connected to a first network port 13 through a first ethernet circuit 12, and the first network port 13 is connected to an ECN bus of the train.

The first ADC chip 14 is connected to the first connector 16 and the first processor 11.

The first bus transceiver 15 is connected to the first connector 16 and the first processor 11.

The first connector 16 connects to the MVB network of the train.

Illustratively, the first processor 11 may employ a processor of FPGA (Field Programmable GATE ARRAY, programmable array logic) + ARM (Advanced RISC Machine) architecture as a core. One path of first Ethernet circuit 12 can be led out from the ARM end of the first processor 11 and connected to the first network port 13 arranged on the front panel, the first network port 13 is used as a connector, and the first network port is externally connected to the train ECN bus through an Ethernet cable, so that the connection between the MVB acquisition equipment 10 and the train ECN bus is realized.

The first connector 16 may comprise a DB9 connector, for example comprising a DB9 male socket and a DB9 female socket. The DB9 male seat and the DB9 female seat are externally connected to an MVB network of the carriage.

The first ADC chip 14 is connected with the DB9 male seat and the DB9 female seat, and the first ADC chip 14 collects MVB network data of the train in real time through the DB9 connector.

The first ADC chip 14 and the first processor 11 may communicate with each other through an SPI (SERIAL PERIPHERAL INTERFACE ) +lvds (Low Voltage DIFFERENTIAL SIGNALING) interface, thereby performing parallel communication. Illustratively, the SPI interface may be used to transmit control signals from the first processor 11 to the first ADC chip 14, and the LVDS interface may be used to transmit data signals from the first ADC chip 14 to the first processor 11.

For example, an isolation chip may be disposed between the first ADC chip 14 and the first processor 11 for signal isolation, thereby ensuring signal integrity.

For example, a signal conditioning circuit may be disposed between the first ADC chip 14 and the first connector 16, where the signal conditioning circuit may be used to perform a certain signal amplification (or reduction), filtering process, and so on the collected raw MVB network data.

The first processor 11 is connected to the DB9 connector through the first bus transceiver 15, and the first processor 11 can communicate with MVB devices mounted on the MVB network, so that on the one hand, the MVB network message data can be collected, and on the other hand, some control instructions can be sent to the MVB devices when specific requirements exist. The first processor 11 transmits the collected MVB network data to the MVB edge computing device 20 through the ECN bus, for example, to a CPU (Central Processing Unit ) board of the MVB edge computing device 20, and the processor of the CPU board performs algorithm processing and analysis on the collected data, so as to determine the health status of the MVB network of the train, give fault early warning information, fault maintenance advice, and the like.

For example, the first ADC chip 14 may collect physical waveforms of MVB network signals, and the first ADC chip 14 has only a collection function. The first bus transceiver 15 may implement message communication between the first processor 11 and the external MVB device, and may be capable of receiving and transmitting, and may perform two-way communication.

Illustratively, the MVB acquisition device 10 may further include an input interface for accessing a power source, which may be disposed on the front panel, which may be connected to a battery of the train, such that the MVB acquisition device 10 may be powered using a DC110V power supply of the train battery.

The MVB acquisition device 10 may also include EMC protection circuitry, power isolation circuitry, power management circuitry. After the DC110V power supply is protected and filtered by the EMC protection circuit, a part of the DC110V power supply reasonably distributes power supply rails of each path by using the power supply management circuit, and realizes power consumption control; the other part is subjected to power isolation and filtering through an isolation power module of the power isolation circuit and the voltage stabilizer, and supplies power for the front-end acquisition circuit. The front-end acquisition circuit includes, for example, the first ADC chip 14, a signal conditioning circuit, and the like.

The MVB acquisition device 10 may also include, for example, a debug interface, memory granules, and a start-up configuration. The debug interface may be used mainly for program injection, serial information printing, etc. The memory granule may be used primarily to provide the memory space required for the operation of the processor system. The start-up configuration may be used to store the system program and the processor automatically loads the system program after the device is powered on.

In some embodiments, the MVB edge computing device is in the form of a card-insertion chassis into which different functional boards may be inserted. For example, the MVB edge computing device is a 3U or 4U card-inserting chassis, and various standard 3U-sized function boards can be vertically inserted into the chassis. For example, referring to fig. 3 to 8 in combination, the mvb edge computing device may include a back plane board 21, a central processing unit board (CPU board) 22, a wireless communication board 23, a memory board 24, and a power board 25.

The CPU board card can communicate with the storage board card, the power board card and the wireless communication board card through the back board card, so that the access of the CPU board card to other board cards is realized.

The CPU board card can diagnose the state of the MVB network based on the collected network data of the MVB network. The memory board card may be used to store acquisition data, diagnostic results, and the like. The power board card can be used for supplying power to other boards. The wireless communication board card can be used for realizing wireless communication between the central processing unit board card and the ground server.

The heat dissipation device can be additionally arranged in a 1U space at the bottom of the 4U chassis, and the vertical air channel between the boards and the openings on the chassis shell are utilized to dissipate heat of the chassis, so that the working efficiency of equipment is improved.

In some embodiments, as shown in fig. 3, the back board card 21 includes a plurality of second connectors 211, and the plurality of second connectors 211 are respectively connected with the central processor board card, the memory board card, the power board card, and the wireless communication board card.

By way of example, the second connector 211 may comprise an XP3 connector. For example, the back board 21 includes 6 second connectors 211, wherein the second connector of the slot 1 may be used to connect with a CPU board, the second connector of the slot 2 may connect with a memory board, the connectors of the slots 3-5 may all connect with an MVB board and a wireless communication board, and the slot 6 may be used to connect with a power board.

Communication traces may be provided between the plurality of second connectors 211. For example, an ethernet bus (ETH bus) is laid between the different second connectors, so as to implement ethernet communication between different functional boards. And an I2C bus is paved between the second connector connected with the power panel card and other second connectors and is used as an uploading channel of the power health data of the power panel card. And SATA connection wiring is reserved between the second connectors connected with the CPU board card and the storage board card, so that data interaction between the storage board card and the CPU board card is realized.

A power trace is arranged between the second connector 211 connected with the power board and the other second connectors 211. For example, the power supply trace includes a power supply trace of D5V, D V to enable the power board to provide 5V or 12V power to other boards.

In some embodiments, as shown in fig. 4, the central processor board 22 includes a second processor 221, a second ethernet circuit 222, a second network port 223, a driving circuit 224, and a third connector 225;

The second processor 221 is connected to a second network port 223 through a second ethernet circuit 222, and the second network port 223 is connected to the ECN bus. The second processor 221 may thus interact with the MVB acquisition device via the ECN bus. Illustratively, the second ethernet circuitry 222 may comprise 2 and the second portal 223 may comprise 2. Illustratively, the second processor 221 in the cpu board 22 may be an ARM processor.

The second processor 221 is connected to the third connector 225 through the driving circuit 224; the third connector 223 connects with the second connector of the backplane board. For example, the third connector 225 of the cpu board 22 is connected to the second connector 211 of slot 1 of the back board 21. Third connector 225 may comprise an XJ3 connector.

By way of example, the drive circuitry 224 may include Ethernet circuitry, I2C drive circuitry, SATA drive circuitry, the Ethernet circuitry of the drive circuitry 224 may be used for Ethernet data transmission, system configuration management, function debugging, and the like. The SATA driving circuit is used for realizing that the CPU board card stores and reads data to the storage board card. The I2C driving circuit is used for realizing an uploading channel of the power health data of the power panel card.

The second processor 221 may also be connected to the solid state disk through a PCIe bus, and directly store and read data.

Illustratively, as shown in fig. 4, the cpu board 22 further includes a power management circuit that can use the power management chip to reasonably allocate power supply rails and implement power consumption control.

Referring to fig. 3 and 4 in combination, the third connector 225 may be inserted into the second connector 211 (for example, a connector with a slot 1) of the board 21, so that the CPU board may access other boards through the second connector 211 and various communication buses laid on the board 21 to implement the communication function between the CPU board and the other boards.

In addition, after the third connector 225 and the second connector 211 are combined, the power board is also used for supplying power to all other boards.

For example, an MVB intelligent diagnosis algorithm program based on big data and machine learning may be set in the cpu board 22, and the algorithm program may perform algorithm processing on the collected MVB network data, store the diagnosis result and the fault maintenance advice in the local hard disk, and transmit the diagnosis result and the fault maintenance advice back to the ground server through the wireless communication board, so that the ground personnel can check the health status of the MVB network of the train in real time.

As shown in fig. 5, the MVB intelligent diagnosis algorithm program may include three models, namely, a fault diagnosis analysis model, a fault prediction analysis model, and a network health status evaluation model.

The operating logic of the MVB intelligent diagnostic algorithm program may be as follows: the algorithm program inputs the MVB network data acquired in real time into three analysis models (a fault diagnosis analysis model, a fault prediction analysis model and a network health state evaluation model) for algorithm analysis, and finally outputs the train MVB network diagnosis result, MVB fault early warning information and MVB fault maintenance suggestion together through analysis and calculation.

The MVB bus may use two data frames: a master frame and a slave frame. The master frame is sent out by the bus manager and the slave frames are sent out by the device that was polled by the master frame.

Exemplary MVB data item points in an algorithm program that are primarily analyzed may include, but are not limited to: bus message analysis, port message format analysis, port message frame interval analysis and port waveform parameter analysis.

The bus message analysis may include, but is not limited to: the A/B path load rate, the A/B path error rate, the period jitter and the slave frame response jitter.

Port message format analysis may include, but is not limited to: a master frame check error, a master frame length error, a slave frame check error, a slave frame length error, a master frame non-man code, a slave frame non-man code, a master frame header undefined, a slave frame header undefined, a master frame tail error, a slave frame tail error, a master frame miss, a slave frame miss.

Port message frame interval analysis may include, but is not limited to: the master-slave frame interval is too long, the master-slave frame interval is too short, the slave frame times out, the master frame period stability and the slave frame period stability.

Port waveform parameter analysis may include, but is not limited to: zero crossing slope, pulse overshoot level, pulse steady state level, clock jitter, frame level, end of frame level, level jitter.

In some embodiments, as shown in fig. 6, the wireless communication board 23 may include a third processor 231, a wireless communication chip 232, a third ethernet circuit 233, and a fourth connector 234.

The third processor 231 is connected to the wireless communication chip 232, and the wireless communication chip 232 is connected to the SMA connector.

The third processor 231 may be an ARM processor. The wireless communication chip 232 may include a WiFi chip, a 5G chip. The third processor 231 is connected with the WiFi chip and the 5G chip through the PCIe bus, achieves the functions of on-board WiFi and 5G, and the WiFi chip and the 5G chip are externally connected to the SMA connector which can be externally connected with an antenna for wireless transmission.

The 5G chip may also be connected to a SIM card, such as a Micro SIM card, mini SIM card, nano SIM card, eSIM card, or the like, for example.

Based on the above design, the wireless communication between the CPU board and the ground server can be realized through the wireless communication board 23.

The third processor 231 is connected to a fourth connector 234 through a third ethernet circuit 233. The fourth connector 234 connects to the second connector of the backplane board.

Illustratively, a third ethernet circuit 233 is led out of the ARM processor and connected to a fourth connector 234, and the fourth connector 234 is connected to the second connector of the backplane board, so that the third processor 231 can communicate with the CPU board through an ethernet bus laid in the backplane board.

For example, the wireless communication board 23 may further reserve a path of ethernet circuit connected to the RJ45 connector for use as a debug portal.

The wireless communication board 23 may also include a power supply IC (power management chip) for realizing control of power supply, for example.

In some embodiments, as shown in fig. 7, memory card 24 may include a solid state disk 241, a disk interface 242, and a fifth connector 243.

The hard disk interface 242 is connected with the solid state disk 241 and the fifth connector 243; the fifth connector 243 connects with the second connector of the back board card.

The hard disk interface 242 and the fifth connector 243 can be connected through a SATA bus, and the back board card is connected to a SATA driving circuit of the CPU board card, thereby realizing the access of the CPU board card to the solid state disk 241.

The fifth connector 243 may include an XJ3 connector.

A power wire may be further laid between the hard disk interface 242 and the fifth connector 243, so as to supply power to the solid state disk 241.

In some embodiments, as shown in fig. 8, the power board 25 includes an input interface 251, a protection circuit 252, a power conversion module 253, a single-chip microcomputer 254, and a sixth connector 255.

The input interface 251 is connected to an input end of the power conversion module 253 through the protection circuit 252, and an output end of the power conversion module 253 is connected to the sixth connector 255.

The singlechip 254 is connected with the power conversion module 253 and the sixth connector 255; the sixth connector 255 connects to the second connector of the backplane board.

The input interface 251 can be connected to the train battery DC110V power supply for power supply. The guard circuit 252 may be used for guard and filtering. The power conversion module 253 may include two, one to convert DC110V to a DC12V output and the other to convert DC110V to a DC5V output.

After the train storage battery DC110V power supply is protected and filtered through the EMC protection circuit, the train storage battery DC110V power supply is respectively converted into DC5V and DC12V through two power supply conversion modules and is transmitted to the second connector of the backboard board card to serve as main power supply of the whole MVB edge computing equipment.

The singlechip 254 can be provided with an ADC acquisition function, and at the output positions of DC5V and DC12V power supplies, the singlechip 254 with the built-in ADC acquisition function is used for monitoring whether the output voltage, the power supply load current and the ambient temperature near the power supply module are normal.

The singlechip 254 sends the data acquired by the ADC to the CPU board card through the I2C bus of the back board card, and the CPU board card converts the data acquired by the ADC into corresponding voltage value, current value and temperature value and compares the corresponding voltage value, current value and temperature threshold with preset voltage threshold, current threshold and temperature threshold. If the real-time data acquired by the ADC is in the range of the threshold value interval, the power supply board card can be judged to be in a normal running state; if the real-time data acquired by the ADC exceeds the threshold interval range, the power supply board card can be judged to be in abnormal working states such as overvoltage, undervoltage, overcurrent and overtemperature, and the CPU board card can record and store the abnormal data, so that the health management function of the power supply can be realized.

In some embodiments, the MVB acquisition device and MVB edge computing device are located in different cars of the train, as noted above. The MVB edge computing device may also have a function of network data acquisition for the MVB network.

Illustratively, as shown in fig. 9, the MVB edge computing device further includes an MVB board 26.MVB board 26 may include a fourth processor 261, a fourth ethernet circuit 262, a third portal 263, a seventh connector 264, a second ADC chip 265, a second bus transceiver 266, a fifth ethernet circuit 267, and an eighth connector 268.

The fourth processor 261 is connected to a third port 263 through a fourth ethernet circuit 262. The third portal 263 may serve as a backup portal.

The second ADC chip 265 is connected to the seventh connector 264 and the fourth processor 261. The second bus transceiver 266 connects the seventh connector 264 and the fourth processor 261. The seventh connector 264 connects to the MVB network.

The fourth processor 261 is connected to the eighth connector 268 through a fifth ethernet circuit 267; the eighth connector 268 connects to the second connector of the backplane board.

The hardware architecture of the MVB panel card 26 is similar to that of the MVB acquisition device 10 in the above embodiment, and the main difference is that: the fourth processor 261 is connected to the eighth connector 268 through a fifth ethernet circuit 267; the eighth connector 268 is connected to the second connector of the back board card, and is connected to the CPU board card by the ethernet bus laid in the back board card, so as to realize ethernet communication between the MVB board card 26 and the CPU board card, and serve as a data uploading channel for the MVB board card to collect MVB network data.

It can be appreciated that the MVB card 26 operates in the same manner as the MVB acquisition device, and the device is not in the same form.

For example, please refer to fig. 1, taking 6 cars as an example, theoretically, one MVB collection device can be placed in each car, and since one MVB edge computing device is placed in one car, the function of the MVB collection device can be directly implemented on one MVB board, and only the device shape is changed, but the MVB board in the MVB edge computing device is actually added, and the function of 6 MVB collection devices is also implemented.

Illustratively, the fourth processor 261 may also employ a processor of the fpga+arm architecture as a core. One path of fourth Ethernet circuit 262 can be led out from the ARM end of the fourth processor 261 and connected to the third network port 263 arranged on the front panel, the third network port 263 is used as a connector, and the third network port 263 is externally connected to the train ECN bus through an Ethernet line, so that the connection between the MVB board card 26 and the train ECN bus is realized.

The seventh connector 264 may comprise a DB9 connector, for example comprising a DB9 male socket and a DB9 female socket. The DB9 male seat and the DB9 female seat are externally connected to an MVB network of the carriage.

The second ADC chip 265 is connected to the DB9 male socket and the DB9 female socket, and the second ADC chip 265 collects MVB network data of the train in real time through the DB9 connector.

The second ADC chip 265 and the fourth processor 261 may communicate with a parallel interface through an spi+lvds interface. Illustratively, the SPI interface may be used to transmit control signals of the fourth processor 261 to the second ADC chip 265, and the LVDS interface may be used to transmit the collected MVB network data signals from the second ADC chip 265 to the fourth processor 261.

For example, an isolation chip may be provided between the second ADC chip 265 and the fourth processor 261 for signal isolation, thereby ensuring signal integrity.

For example, a signal conditioning circuit may be disposed between the second ADC chip 265 and the seventh connector 1264, where the signal conditioning circuit may be used to perform a certain signal amplification (or reduction), filtering process, and so on the collected original MVB network data.

The fourth processor 261 is connected to the DB9 connector through the second bus transceiver 266, and the fourth processor 261 can communicate with MVB devices mounted on the MVB network, on the one hand, capable of collecting MVB network message data, and on the other hand, also capable of sending some control instructions to the MVB devices when there is a specific need.

The fourth processor 261 transmits the collected MVB network data to the CPU board through the fifth ethernet circuit 267, the eighth connector 268, and the ethernet bus laid in the back board.

For example, the second ADC chip 265 may collect physical waveforms of MVB network signals, and the second ADC chip 265 has only a collection function. The second bus transceiver 266 may implement message communication between the fourth processor 261 and the external MVB device, and may be capable of receiving and transmitting messages, and may perform two-way communication.

The MVB card 26 may also include power management circuitry to enable control of power supply, for example.

In summary, the vehicle-mounted network diagnosis system in the embodiment of the application can monitor, record and analyze train MVB bus information in real time, and diagnose train MVB bus faults and health states in real time on line, so that ground personnel can monitor the health states of the train MVB network in real time. Aiming at the train MVB bus, the vehicle-mounted MVB health diagnosis system can realize the functions of message checking, waveform checking, real-time monitoring, fault positioning, quality evaluation, fault early warning and the like.

In the application, the modes of data acquisition and data landing are as follows: MVB acquisition equipment and MVB edge computing equipment are respectively deployed in different carriages of the train, and MVB bus data of each carriage are acquired in real time. The MVB acquisition equipment and the MVB edge computing equipment are connected into the train ECN bus through Ethernet lines to realize data interaction, so that the acquired MVB network data are summarized into a processor of a CPU board card in the MVB edge computing equipment, the MVB edge computing equipment can process and analyze the acquired MVB network data in real time by utilizing an MVB intelligent diagnosis algorithm based on big data and machine learning, which is operated in the CPU board card, and perform online health diagnosis on the train MVB network state, store diagnosis results, early warning information and overhaul information in a local hard disk, and upload the diagnosis results, early warning information and overhaul information to a ground server through a wireless communication board card in real time, thereby facilitating ground personnel to acquire the train operation health state in time, facilitating engineering personnel to position fault reasons in time and solve train faults as soon as possible.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

These embodiments are not exhaustive of all details, nor are they intended to limit the application to the precise embodiments disclosed, in accordance with the application. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and the practical application, to thereby enable others skilled in the art to best utilize the application and various modifications as are suited to the particular use contemplated. The application is limited only by the claims and the full scope and equivalents thereof.

Claims (10)

1. An in-vehicle network diagnostic system, comprising:

the MVB acquisition equipment is connected with an MVB network and an ECN bus of the train and is used for acquiring network data of the MVB network in real time;

And the MVB edge computing device is connected with the ECN bus and is used for acquiring network data acquired by the MVB acquisition device from the ECN bus and diagnosing the state of the MVB network based on the network data.

2. The on-board network diagnostic system of claim 1, wherein,

The MVB acquisition devices are respectively positioned in different carriages of the train;

and/or the MVB acquisition device and the MVB edge computing device are located in different carriages of the train.

3. The on-board network diagnostic system of claim 1, wherein the MVB acquisition device comprises a first processor, a first ethernet circuit, a first portal, a first ADC chip, a first bus transceiver, a first connector;

the first processor is connected with the first network port through the first Ethernet circuit, and the first network port is connected with the ECN bus;

The first ADC chip is connected with the first connector and the first processor;

the first bus transceiver is connected with the first connector and the first processor;

the first connector is connected with the MVB network.

4. The on-board network diagnostic system of claim 1, wherein the MVB edge computing device comprises a backplane board, a central processor board, a wireless communication board, a memory board, and a power board;

the CPU board card communicates with the memory board card, the power board card and the wireless communication board card through the back board card.

5. The on-board network diagnostic system of claim 4, wherein,

The backboard board card comprises a plurality of second connectors, and the second connectors are respectively connected with the central processing unit board card, the storage board card, the power board card and the wireless communication board card;

Communication wires are arranged among the plurality of second connectors;

and a power supply wiring is arranged between the second connector connected with the power supply board and the other second connectors.

6. The on-board network diagnostic system of claim 4, wherein the central processor board comprises a second processor, a second ethernet circuit, a second portal, a driving circuit, and a third connector;

The second processor is connected with the second network port through the second Ethernet circuit, and the second network port is connected with the ECN bus;

The second processor is connected with the third connector through the driving circuit;

The third connector is connected with the second connector of the backboard board card.

7. The on-board network diagnostic system of claim 4, wherein the wireless communication board card comprises a third processor, a wireless communication chip, a third ethernet circuit, a fourth connector;

The third processor is connected with the wireless communication chip, and the wireless communication chip is connected to an SMA connector;

the third processor is connected with the fourth connector through the third Ethernet circuit;

The fourth connector is connected with the second connector of the backboard board card.

8. The on-board network diagnostic system of claim 4, wherein the memory board card comprises a solid state disk, a hard disk interface, and a fifth connector;

The hard disk interface is connected with the solid state disk and the fifth connector;

The fifth connector is connected with the second connector of the backboard board card.

9. The vehicle-mounted network diagnostic system of claim 4, wherein the power board card comprises an input interface, a protection circuit, a power conversion module, a single-chip microcomputer, and a sixth connector;

The input interface is connected with the input end of the power conversion module through the protection circuit, and the output end of the power conversion module is connected with the sixth connector;

the singlechip is connected with the power supply conversion module and the sixth connector;

The sixth connector is connected with the second connector of the backboard board card.

10. The on-board network diagnostic system of claim 4, wherein the MVB acquisition device and the MVB edge computing device are located in different cars of the train;

The MVB edge computing device further comprises an MVB board card;

The MVB board card comprises a fourth processor, a fourth Ethernet circuit, a third network port, a seventh connector, a second ADC chip, a second bus transceiver, a fifth Ethernet circuit and an eighth connector;

The fourth processor is connected with the third network port through the fourth Ethernet circuit;

the second ADC chip is connected with the seventh connector and the fourth processor;

the second bus transceiver is connected with the seventh connector and the fourth processor;

The seventh connector is connected with the MVB network;

the fourth processor is connected with the eighth connector through the fifth Ethernet circuit;

the eighth connector is connected with the second connector of the backboard board card.