CN111404799A - Train fault positioning system and method based on CAN communication and L AN communication disconnection - Google Patents
Train fault positioning system and method based on CAN communication and L AN communication disconnection Download PDFInfo
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- CN111404799A CN111404799A CN202010204138.9A CN202010204138A CN111404799A CN 111404799 A CN111404799 A CN 111404799A CN 202010204138 A CN202010204138 A CN 202010204138A CN 111404799 A CN111404799 A CN 111404799A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40013—Details regarding a bus controller
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40293—Bus for use in transportation systems the transportation system being a train
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a train fault positioning system based on CAN communication and L AN communication, which comprises AN on-board computer and a control panel communicated with the on-board computer, wherein the on-board computer respectively controls a CAN communication link and a L AN communication link through a superIO control module, the CAN communication link and the L AN communication link are mutually redundant, the CAN communication link is that the on-board computer is connected with a SJA1000 module through AN FPGA module, the SJA1000 module is connected with a CAN digital quantity switch chip, the CAN digital quantity switch chip is connected with AN on-board equipment end through RS485, a L AN communication link is that the on-board computer is connected with a L AN8720A module through intel82574, a L AN8720A module is connected with a L AN digital quantity switch chip, and a L AN digital quantity switch chip is connected with the on-board equipment end through RS232, and the on-board equipment end is connected with the on-board computer through intel 82574.
Description
Technical Field
The invention relates to a communication line switching method, in particular to a train fault positioning system based on CAN communication and L AN communication disconnection.
Background
The train fault positioning method is a fault positioning method developed by relying on a communication network, the development process of the method supplements the development of the communication network, and the long-term lag is long, in foreign aspects, from the end of 70 s to the beginning of 80 s, Switzerland develops a first-world vehicle-mounted communication network control system-MICAS system and a SIBAS system developed in Germany based on a vehicle-mounted computer serial bus communication network.
Disclosure of Invention
Based on the above problems, the present invention provides a cut-off control technique for CAN communication and L AN communication in the field of vehicle-mounted fault location, compared with the current single communication protocol fault location technique, the method is compatible with a plurality of communication protocols and CAN freely switch between CAN communication and L AN communication links,
a train fault positioning system based on CAN communication and L AN communication comprises a vehicle-mounted computer and a control panel communicated with the vehicle-mounted computer, wherein the vehicle-mounted computer respectively controls a CAN communication link and a L AN communication link through a superIO control module, the CAN communication link and the L AN communication link are mutually redundant, the CAN communication link is formed by connecting the vehicle-mounted computer with AN SJA1000 module through AN FPGA module, the SJA1000 module is connected with a CAN digital switch chip, the CAN digital switch chip is connected with a vehicle-mounted equipment end through RS485, the L AN communication link is formed by connecting the vehicle-mounted computer with a L AN8720A module through intel82574, the L AN8720A module is connected with a L AN digital switch chip, and the L AN digital switch chip is connected with the vehicle-mounted equipment end through RS 232.
Further, the control panel comprises a function area, an equipment state monitoring area and an equipment control area, wherein the equipment control area comprises oil pump control, air conditioner control, a working mode, valve control, generator control, ventilation control, oil pump control, voice control and channel selection; the oil pump control, the air conditioner control, the valve control, the generator control, the ventilation control, the oil pump control and the voice control can all carry out channel selection.
Further, the data of the equipment state monitoring area is displayed in different colors according to the safety level; wherein yellow represents the lower limit, blue represents the lower limit, green represents the normal, orange represents the higher limit, and red represents the upper limit.
A train fault location method based on CAN communication and L AN communication comprises the following operation steps:
s1, a user selects a working mode on a control panel according to requirements, wherein the working mode is a manual mode or an automatic mode; selecting an automatic mode, and connecting a certain channel by default according to the setting of the system; the channel can also be selected in manual mode;
s2, the control panel sends a query instruction to the vehicle-mounted computer, the vehicle-mounted computer is connected with the CAN communication link or the L AN communication link according to the mode selected in S1 to perform information query, if the CAN communication link for executing the command fails, the vehicle-mounted computer feeds back the failure to the control panel, automatically connects with the L AN communication link and is connected with the vehicle-mounted equipment end through RS232, if the L AN communication link for executing the command fails, the vehicle-mounted computer feeds back the failure to the control panel, automatically connects with the CAN communication link and is connected with the vehicle-mounted equipment end through RS 485;
s3, according to the selected channel in S1, feeding back the acquired data to the vehicle-mounted computer through the FPGA module by the SJA1000 module or feeding back the acquired data to the vehicle-mounted computer through the intel82574 by the L AN8720A module;
and S4, the vehicle-mounted computer feeds back the data to the control panel, and the control panel displays the related data to the user to complete one instruction operation.
Advantageous effects
The CAN communication and the L AN communication are important components of the high-speed rail train communication, on the communication link logic, two communication modes CAN be mutually redundant and complement, and particularly in the aspect of fault positioning, the communication cut-off technology is AN effective method for quickly positioning and judging the fault mode.
Drawings
FIG. 1 is a schematic diagram of the present system;
FIG. 2 is a schematic diagram of CAN communication disconnection according to the present invention;
FIG. 3 is a L AN communication cut-off schematic of the present invention;
FIG. 4 is a communication switching unit;
FIG. 5 is a control panel display page view;
FIG. 6 is a work flow diagram;
Detailed Description
The following detailed description of specific embodiments of the invention is provided in conjunction with the accompanying drawings of FIGS. 1-6:
a train fault positioning system based on CAN communication and L AN communication comprises a vehicle-mounted computer, a control panel and a peripheral connection module, wherein the control panel is communicated with the vehicle-mounted computer, the vehicle-mounted computer respectively controls a CAN communication link and a L AN communication link through a SuperIO (IT8768) control module, the CAN communication link and a L AN communication link are redundant, the CAN communication link is formed by connecting the vehicle-mounted computer with AN SJA1000 module through AN FPGA module, the SJA1000 module is connected with a CAN digital quantity switch chip, the CAN digital quantity switch chip is connected with a vehicle-mounted equipment end through RS485, the L AN communication link is formed by connecting the vehicle-mounted computer with a L AN8720A module through intel82574, connecting AN L AN8720A module with a L AN digital quantity switch chip, and connecting AN L AN digital quantity switch chip with the vehicle-mounted equipment end through RS232, and the peripheral connection module comprises AN RS485 module, AN RS232 module, a L AN communication module, AN indicator light module and the like.
In the CAN communication channel, the FPGA is provided with a CAN communication module, and CAN transmit the control information of the vehicle-mounted computer to each equipment end by a CAN communication protocol or transmit the processed peripheral feedback signal. And information sent by the peripheral communication system is sent to the FPGA chip through the RS485 communication port via the Pericom digital quantity switch chip and the SJA1000 CAN communication control chip, so that one-time CAN communication transmission is completed. The CAN communication cutting module is one of core functions of the communication line switching module. When the control pin of the Pericom digital switch chip has high level input, the chip normally open switch can be controlled to be closed. The SuperIO (IT8768) CAN generate a control signal to act on a Pericom digital switch chip control pin of CAN communication, so as to realize the connection and disconnection of a CAN communication link.
The L AN communication cut-off module is another core function of the communication line switching module, a Super IO (IT8768) generates control signals, but related pins are connected to the Pericom digital quantity switch chip for controlling L AN communication, thereby realizing the connection and disconnection of a L AN communication link.
The chip CAN act on different Pericom digital quantity switch chips according to the category of the control signal, and further execute connection and disconnection of CAN communication or L AN communication.
The control panel can process the signals transmitted by the bus through background processing software and then display the signals on the touch screen of the upper computer in the form of images or switch signals. Through the selection of the carriage number, the control panel can display the state and control information of each carriage in real time. Meanwhile, popup display is carried out on alarm information generated by the carriage. The data for real-time changes can be displayed by color differentiation. Wherein yellow represents the lower limit, blue represents the lower limit, green represents the normal, orange represents the higher limit, and red represents the upper limit. And performing popup prompt aiming at the data volume marked red by the system so as to facilitate timely processing by operation management personnel. The system data is recorded in a vehicle-mounted database, and historical data can be inquired in the forms of reports, graphs and the like.
In a specific application process, the CAN communication mode CAN be connected to the RS485 female head end of the vehicle-mounted control equipment communication assembly module through the RS485 communication line male head. The other female head end of the RS485 communication line is connected with the RS485 male head end of the device. After the connection is completed, the equipment is opened, and CAN communication CAN be carried out by selecting a CAN communication mode. Wherein, two other RS485 mouths are spare communication port, can change when this communication port breaks down and use.
L AN communication mode can be connected to the RS232 communication male head end of the device through the RS232 communication line female head end, the RS232 communication line male head end at the other end is connected to the RS232 female head end of the vehicle control device, after the connection is completed, the device is opened, and the L AN communication mode is selected to carry out L AN communication, wherein, the other RS232 port is a standby communication port and can be replaced when the communication port has a fault.
The communication control can be connected to the COM6 port of the device through one end of a network cable, and the other end of the network cable is connected to the network port of the vehicle-mounted computer communication device. The communication control connection of the related control quantity and data quantity can be completed.
The man-machine interaction communication can be realized through a network cable, one end of the man-machine interaction communication is connected to the COM7 port of the equipment, and the other end of the man-machine interaction communication is connected to the touch screen computer network port. The connection of the man-machine interaction data line can be completed.
In a specific application process, the control indicator lamp can be realized through FPGA programming. The on/off state of the associated indicator light indicates the status of the associated communication. In fig. 4, the communication switching unit is provided with a threaded mounting hole 1, an RS485 communication COM1 physical port 2, an RS485 communication COM2 physical port 3, an RS485 communication fault indicator lamp 4, a communication fault indicator lamp 5, a communication normal indicator lamp 6, an RS232 communication COM3 physical port 7, an RS485 communication normal indicator lamp 8, an RS232 communication normal indicator lamp 9, an RS232 communication fault indicator lamp 10, a COM6 communication normal indicator lamp 11, a COM6 communication fault indicator lamp 12, a COM7 communication normal indicator lamp 13, a system reset button 14, a COM7 communication fault indicator lamp 15, a COM7 communication port 16, a COM5 communication port 17, a COM6 communication port 18, a power switch 19, a power indicator lamp 20 and a COM4 communication port 21. When the communication fault indicator lamp is turned on, the device can send out an alarm signal to prompt a trainee to carry out communication inspection. And faults are eliminated in time, and the running safety of the train is ensured. When the system power is turned on, the power indicator lights up.
When the RS485 communication is in a fault state, namely CAN communication is in a fault state, the RS485 communication fault indicator lamp 4 is in a normally-on state and is displayed in a red color, and the corresponding RS485 communication normal indicator lamp 8 is in AN off state.
And a communication failure indicator lamp 5 which is normally on when a communication failure occurs and displays red, and a communication normal indicator lamp 6 is off at this time. This state indicates that a communication failure has occurred, and the communication failure needs to be checked in time. The communication normal indicator lamp 6 is a communication normal indicator lamp. When all communications are normal, the lamp is normally on and displays green, and the communication failure indicator lamp 5 is off. This state shows that the respective communication devices are functioning normally without any operation.
When the RS485 communication is normal, the RS485 communication normal indicator light 8 is normally on and displays green. The corresponding RS485 communication failure indicator lamp 4 is in an off state. This state shows that the RS485 communication is normal without any processing.
When the RS232 communication is normal, the RS232 communication normal indicator lamp 9 is normally on, and is displayed in green. The corresponding RS232 communication failure indicator lamp 10 is in an off state. This status indicates that RS232 communication is normal without any processing. RS232 communication failure indicator lamp 10. When RS232 communication fails, it is normally on, showing red. The corresponding RS232 communication normal indicator lamp 9 is in an off state. The state shows that RS232 communication fails, and communication failures need to be checked timely.
When the COM6 port is communicating properly, it is normally on, showing green. The corresponding COM6 communication failure indicator light 12 is in an off state. This state shows that the COM6 port is communicating normally without any processing. When the COM6 port communication fails, the COM6 communication failure indicator light 12 is normally on, and is displayed in red. The corresponding COM6 communication normal indicator light 11 is in an off state. This status indicates that COM6 port communications are malfunctioning and require timely handling by the operator.
When the COM7 port communication is normal, the COM7 communication normal indicator light 13 is normally on and is displayed in green. The corresponding COM7 port communication failure indicator light 15 is off. This state shows that the COM7 port is communicating normally without any processing. When COM7 port communication fails, the COM7 port communication failure indicator light 15 is normally on and displayed in red. The corresponding COM7 communication normal indicator light 13 is in an off state. This status indicates that COM7 port communications have failed, requiring timely handling by the operator.
In a specific application process, the control panel is connected with the communication equipment through a network port. Its main functions are divided into two aspects. One aspect is: and realizing the monitoring function. The system is used for displaying parameters, alarm information, control states and the like of the vehicle; another aspect is: and realizing a control function for carrying out related control operation on the vehicle. The monitoring parameters include: current channel, current car, communication status, current temperature, current load, brake status, hydraulic status, cold plate temperature, lavatory status, etc. The control parameters include: mode selection, channel selection, oil pump control, valve control, air conditioner control, voice control, and the like. The touch screen computer network port is connected with the communication switching system COM7 port through a network cable. And partial vehicle-mounted serial bus data are transmitted to the touch screen computer terminal through a COM6 port. The COM7 port is connected with the vehicle-mounted computer through a network cable and is used for transmitting historical data and related alarm and control information and the like. The touch screen can be embedded into a train control platform and fixed through bolts.
A train fault location method based on CAN communication and L AN communication comprises the following operation steps:
s1, a user selects a working mode on a control panel according to requirements, wherein the working mode is a manual mode or an automatic mode; selecting an automatic mode, and connecting a certain channel by default according to the setting of the system; the channel can also be selected in manual mode;
s2, the control panel sends a query instruction to the vehicle-mounted computer, the vehicle-mounted computer is connected with the CAN communication link or the L AN communication link according to the mode selected in S1 to perform information query, if the CAN communication link for executing the command fails, the vehicle-mounted computer feeds back the failure to the control panel, automatically connects with the L AN communication link and is connected with the vehicle-mounted equipment end through RS232, if the L AN communication link for executing the command fails, the vehicle-mounted computer feeds back the failure to the control panel, automatically connects with the CAN communication link and is connected with the vehicle-mounted equipment end through RS 485;
in an equipment state monitoring area in the control panel, data is displayed in different colors according to the safety level; wherein yellow represents the lower limit, blue represents the lower limit, green represents the normal, orange represents the higher limit, and red represents the upper limit.
S3, according to the selected channel in S1, feeding back the acquired data to the vehicle-mounted computer through the FPGA module by the SJA1000 module or feeding back the acquired data to the vehicle-mounted computer through the intel82574 by the L AN8720A module;
and S4, the vehicle-mounted computer feeds back the data to the control panel, and the control panel displays the related data to the user to complete one instruction operation.
The menu set in the control panel relates to a parameter correction method which can dynamically correct the calibration parameters and eliminate the influence caused by data transmission and system refresh cycle lag. And comparing the acquired data with the data range value in the dynamic database, and further displaying the super-threshold parameter.
Inquiring equipment data in the control panel to perform database retrieval according to the inquiry parameters; wherein the retrieved data is displayed in the form of a report or a curve graph.
The vehicle length authority in the control panel is divided into low level, medium level and high level according to the vehicle length level; wherein the low level rights can only open the device status monitoring area; the middle-level authority can open an equipment state monitoring area and an equipment control area; the high-level authority may open a device status monitoring area, a device control area, and system settings.
Of course, the above description is not intended to limit the present technology, and the present technology is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (4)
1. A train fault positioning system based on CAN communication and L AN communication is characterized by comprising AN on-board computer and a control panel communicated with the on-board computer, wherein the on-board computer respectively controls a CAN communication link and a L AN communication link through a superIO control module, the CAN communication link and a L AN communication link are mutually redundant, the CAN communication link is formed by connecting the on-board computer with AN SJA1000 module through AN FPGA module, the SJA1000 module is connected with a CAN digital switch chip, the CAN digital switch chip is connected with a vehicle-mounted equipment end through RS485, the L AN communication link is formed by connecting the on-board computer with a L AN8720A module through intel82574, the L AN8720A module is connected with a L AN digital switch chip, and the L AN digital switch chip is connected with the vehicle-mounted equipment end through RS 232.
2. The system of claim 1, wherein the control panel comprises a function area, AN equipment status monitoring area and AN equipment control area, the equipment control area comprises AN oil pump control area, AN air conditioner control area, AN operation mode, a valve control area, a generator control area, a ventilation control area, AN oil pump control area, a voice control area and a channel selection area, and the channel selection area CAN be used for the oil pump control area, the air conditioner control area, the valve control area, the generator control area, the ventilation control area, the oil pump control area and the voice control area.
3. The system of claim 2 wherein the device status monitoring area data is displayed in different colors according to safety level, wherein yellow represents low limit, blue represents low, green represents normal, orange represents high, and red represents high limit.
4. A train fault positioning method based on CAN communication and L AN communication is characterized by comprising the following operation steps:
s1, a user selects a working mode on a control panel according to requirements, wherein the working mode is a manual mode or an automatic mode; selecting an automatic mode, and connecting a certain channel by default according to the setting of the system; the channel can also be selected in manual mode;
s2, the control panel sends a query instruction to the vehicle-mounted computer, the vehicle-mounted computer is connected with the CAN communication link or the L AN communication link according to the mode selected in S1 to perform information query, if the CAN communication link for executing the command fails, the vehicle-mounted computer feeds back the failure to the control panel, automatically connects with the L AN communication link and is connected with the vehicle-mounted equipment end through RS232, if the L AN communication link for executing the command fails, the vehicle-mounted computer feeds back the failure to the control panel, automatically connects with the CAN communication link and is connected with the vehicle-mounted equipment end through RS 485;
s3, according to the selected channel in S1, feeding back the acquired data to the vehicle-mounted computer through the FPGA module by the SJA1000 module or feeding back the acquired data to the vehicle-mounted computer through the intel82574 by the L AN8720A module;
and S4, the vehicle-mounted computer feeds back the data to the control panel, and the control panel displays the related data to the user to complete one instruction operation.
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Cited By (1)
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| CN116085942A (en) * | 2022-12-07 | 2023-05-09 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and electronic equipment |
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| CN110562275A (en) * | 2019-09-09 | 2019-12-13 | 中车南京浦镇车辆有限公司 | Multichannel dual-redundancy rail transit vehicle reconnection system and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116085942A (en) * | 2022-12-07 | 2023-05-09 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and electronic equipment |
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