CN104796356A - Vehicle-mounted Ethernet switch and signal transceiving and train reconnecting method for railway vehicles - Google Patents
Vehicle-mounted Ethernet switch and signal transceiving and train reconnecting method for railway vehicles Download PDFInfo
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- CN104796356A CN104796356A CN201510181722.6A CN201510181722A CN104796356A CN 104796356 A CN104796356 A CN 104796356A CN 201510181722 A CN201510181722 A CN 201510181722A CN 104796356 A CN104796356 A CN 104796356A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention relates to a switch device, in particular to a vehicle-mounted Ethernet switch and a signal transceiving and train reconnecting method for railway vehicles. The Ethernet switch comprises a power source module, a CPU (central processing unit) module, a switch module, an Ethernet transceiver module, a front back plate module and a rear back plate module. The Ethernet switch can be flexibly expanded and configured according to actual application and is provided with many interfaces, multi-channel Ethernet interfaces, such as eight channels, 16 channels or 24 channels, can be configured according to needs, production cost of the switch is effectively reduced, and link aggregation, bypass, bi-layer forwarding/tri-layer routing, train data real-time transmission, train-net and vehicle-net data conversion and train reconnection are supported.
Description
Technical field
The present invention relates to a kind of exchange apparatus, specifically, relate to a kind of can be used for train control network and information network used for rail vehicle vehicle-mounted Ethernet switch and signal transmitting and receiving and the heavy linked method of train.
Background technology
Along with train is constantly towards safety, reliable and intelligentized future development, the bandwidth of existing rail vehicle net control is little, cannot meet the large bandwidth demand that Train Control and information service are transmitted.And traditional motor train unit net control mainly adopts WTB bus and MVB, its bandwidth only has 1Mbps and 1.5Mbps respectively, prevailing transmission Train Control (as traction control, control for brake, auxiliary control, Car's door controlling etc.) data, and for data such as train status data, train diagnostic data, train maintenances because bandwidth restriction cannot be transmitted in time, have impact on maintainability and the availability of train information transmission greatly.Such as, and along with the continuous expansion of train network application, the variation of train information service, make train network needs the information transmitted to get more and more, the bandwidth of traditional train WTB/MVB network can not support the transmission requirement of Large Volume Data like this.
In recent years, along with the development of the communication technology, industrial Ethernet technology is more and more ripe, compared with traditional train network control system, Industrial Ethernet has higher message transmission rate (being not less than for 100,000,000/second) and bandwidth, make bulk information transmission, the function such as intelligent diagnostics, fault are accurately located, expert diagnostic system becomes possibility, and networking flexibility is convenient, is the development trend of train network control system.And switch is as the nucleus equipment of Industrial Ethernet, naturally become the important composition equipment of rail vehicle Train Control and information service network.
The functional requirement switch of Train Control and information service network has and controls and support that train heavily joins function in real time.These two kinds of characteristics are the characteristics not available for common rail vehicle switch.
Summary of the invention
The object of this invention is to provide one and be applicable to the heavy linked method of the vehicle-mounted Ethernet switch of bullet train, locomotive and city railway vehicle and signal transmitting and receiving and train, there is real-time Data Transmission agreement, support that train heavily joins function, vehicle net and train net Ethernet data translation function, can according to practical application flexible expansion and configuration, transmission rate is fast and reliability is high, greatly simplifies Train Dynamic network configuration and attended operation.
Technical scheme of the present invention is: vehicle-mounted Ethernet switch used for rail vehicle, be applied to bullet train, locomotive and city railway vehicle, it is characterized in that: this Ethernet switch comprises power module, CPU module, Switching Module, ethernet transceiver module, pronotum module and postnotum module;
Described CPU module and described Switching Module, described pronotum module and described postnotum model calling,
Described CPU module carries out both-way communication by PCIE interface and described Switching Module,
Described CPU module carries out program upgrade by USB interface or Ethernet interface,
Described CPU module provides real-time clock signal by RTC clock circuit;
Described Switching Module and described postnotum module, described pronotum module and described ethernet transceiver model calling,
Described Switching Module carries out both-way communication by 24 road Media Independent Interfaces and described ethernet transceiver module,
Described Switching Module is by the blink states of the LED of pronotum module described in port status Interface Controller;
Described ethernet transceiver module and described postnotum module and described pronotum model calling,
Described ethernet transceiver module carries out both-way communication by 8 road Media Independent Interfaces and described Switching Module,
Described ethernet transceiver module is by 8 road Ethernet interfaces and described pronotum model calling;
Described power module and postnotum model calling are described CPU module, described Switching Module and described ethernet transceiver module for power supply;
Described pronotum module and described CPU module and described ethernet transceiver model calling; And be provided with power interface, USB port, serial port, debugging ethernet port, multichannel ethernet port and the LED for showing multichannel ethernet port state.
Redundant power supply supported by this Ethernet switch, and described power module comprises 2 tunnels independently electromagnetic compatibility protective circuit and front end power module, has 2 road redundant inputs, when a road power supply circuits fault, can be powered by another power supply circuits.
For guaranteeing the accurate control of this Ethernet switch, described CPU module comprises high speed microprocessor chip, externally provides USB interface, serial interface, Ethernet interface, RTC clock circuit and PCIE interface; Described high speed microprocessor chip carries out both-way communication by PCIE interface and described Switching Module.
For ensureing the two-forty of the transfer of data of this Ethernet switch, described Switching Module comprises high density port exchange chip, externally provides PCIE interface, 24 road Media Independent Interfaces and port status interface; Described high density port exchange chip carries out both-way communication by PCIE interface and described high speed microprocessor chip.
Further, for improving the versatility of this Ethernet switch, this Ethernet switch at least comprises 1 ethernet transceiver module, be equipped with ethernet transceiver in each ethernet transceiver module, described ethernet transceiver externally provides at least 8 road Media Independent Interfaces and at least 8 road Ethernet interfaces; Network transformer is provided with between the ethernet transceiver of described ethernet transceiver module and 8 road Ethernet interfaces.
According to the actual requirements, this Ethernet switch externally can provide 16 road Media Independent Interfaces and 16 road Ethernet interfaces, this Ethernet switch comprises 2 ethernet transceiver modules, ethernet transceiver is equipped with in each ethernet transceiver module, 2 ethernet transceivers externally provide totally 28 road Media Independent Interfaces and 28 road Ethernet interfaces, namely provide 16 road Media Independent Interfaces and 16 road Ethernet interfaces; Network transformer is equipped with between each ethernet transceiver of described ethernet transceiver module and each 8 road Ethernet interfaces.
Further, 24 road Media Independent Interfaces and 24 road Ethernet interfaces can be externally provided, this Ethernet switch is also provided with bypass module, substantially identical with the 26S Proteasome Structure and Function of described ethernet transceiver module, described bypass module comprises with bypass module too net transceiver, externally provides 8 road Media Independent Interfaces, 4 roadside road interfaces and 4 road Ethernet interfaces; Described bypass module and described Switching Module, described postnotum module and described pronotum model calling, described bypass module carries out both-way communication by 8 road Media Independent Interfaces and described Switching Module, described bypass module is by 4 road Ethernet interfaces and 4 roadside road interfaces and described pronotum model calling, and described pronotum module is provided with 4 roadside road ports; Network transformer is provided with between described bypass module ethernet transceiver and 4 road Ethernet interfaces; Network transformer and relay is provided with between described bypass module ethernet transceiver and 4 roadside road interfaces.
For increasing the Universal and scalability of this Ethernet switch, described pronotum module is also provided with power interface, CPU module interface, Switching Module interface, ethernet transceiver module interface and bypass module interface.
Described pronotum module is connected with described power module by power interface, for power module provides electric energy;
Described pronotum module is connected with described CPU module by CPU module interface, and provides USB port, serial port and debugging ethernet port;
Described pronotum module is connected with described Switching Module by Switching Module interface, for controlling the blink states of described LED;
Described pronotum module is connected with described bypass module with described ethernet transceiver module with bypass module interface by ethernet transceiver module interface, and provides 24 road ethernet ports and 4 roadside road ports.
The present invention is open a kind of vehicle-mounted Ethernet switch signal transmit-receive method used for rail vehicle also, comprises following methods step:
1) CPU module configuration Switching Module, Real Time Protocol data packet format;
2) multichannel ethernet port receives Real Time Protocol data bag, and through ethernet transceiver module and Switching Module, the Real Time Protocol data bag received is passed to CPU module successively;
3) CPU module Real Time Protocol data frame, and the Real Time Protocol data bag after process is sent to the output of multichannel ethernet port through Switching Module and ethernet transceiver module successively.
Vehicle-mounted Ethernet switch signal transmitting and receiving used for rail vehicle and the heavy linked method of train, comprise train Real-time Data Transfer Method, namely CPU module control data carries out periodicity and sporadic transmission, and provides transparent clock; Step 2) in the Real Time Protocol data handbag that receives of multichannel ethernet port draw together periodic data and the sporadic data of trailer system and braking system; In data transmission procedure, CPU module detects the data do not transmitted in official hour, and sends Application Hints by multichannel ethernet port.
Vehicle-mounted Ethernet switch signal transmitting and receiving used for rail vehicle and the heavy linked method of train comprise the heavy linked method of train, i.e. step 2) in multichannel ethernet port receive Real Time Protocol data bag be neighbours' train node message, CPU module by neighbours' train node message acquisition neighboring switch nodal information; And will neighbours' train node message be received send to the switch of full train of vehicles, and obtain the topology information of full train of vehicles according to the neighbours' train node message received; Topology information according to obtaining arranges each module parameter of Ethernet switch, and the full train of vehicles topology information obtained is sent to train display node after user confirms, be sent to all mobile units by multichannel ethernet port, the train realizing full train of vehicles heavily joins.
Vehicle-mounted Ethernet switch signal transmitting and receiving used for rail vehicle and the heavy linked method of train comprise the data transfer device of train net and vehicle net, i.e. step 2) in multichannel ethernet port receive Real Time Protocol data bag be neighbours' train node message, after CPU module carries out logical operation process to train node message, form new train DBMS bag and send to all the other Ethernet switches by multichannel ethernet port; Train node message, after CPU module carries out logical operation process to train node message, is split as N number of packet, and sends to the ethernet controller of corresponding train according to train logic by the train DBMS bag that all the other Ethernet switches receive.
The present invention's beneficial effect is compared with prior art:
1), compared with Ethernet switch vehicle-mounted with tradition, this Ethernet switch can support link aggregation, bypass, two layers forward tri-layers of routing function, train data real-time Transmission, train net vehicle network data changes and support train heavily joins function;
2) can according to practical application flexible expansion and configuration, interface quantity is many, can configure multichannel Ethernet interface according to demand, as 8 road Ethernet interfaces, 16 road Ethernet interfaces or 24 road Ethernet interfaces, effectively reduces switch production cost;
3) message transmission rate can reach gigabit, and transmission rate is fast and reliability is strong, effectively simplifies Train Dynamic network configuration and attended operation.
Accompanying drawing explanation
Fig. 1 is Ethernet switch structural representation () of the present invention;
Fig. 2 is power module structure figure of the present invention;
Fig. 3 is CPU module structure chart of the present invention;
Fig. 4 is Switching Module structure chart of the present invention;
Fig. 5 is ethernet transceiver function structure chart of the present invention;
Fig. 6 is bypass module structure chart of the present invention;
Fig. 7 is pronotum function structure chart of the present invention;
Fig. 8 is the fast structure chart of back template die of the present invention;
Fig. 9 is Ethernet switch structural representation (two) of the present invention;
Figure 10 is Ethernet switch structural representation (three) of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those skilled in the art obtain under the prerequisite not making creative work, all belongs to protection scope of the present invention.
Embodiment 1
See Fig. 1, vehicle-mounted Ethernet switch used for rail vehicle, comprises power module, CPU module, Switching Module, ethernet transceiver module, pronotum module and postnotum module;
Power module and postnotum model calling are CPU module, Switching Module and ethernet transceiver module for power supply;
Power module structure figure is as Fig. 2, and power module comprises 2 tunnels independently electromagnetic compatibility protective circuit and front end power module, has 2 road redundant inputs, when a road power supply circuits fault, can be powered by another power supply circuits, improves the fail safe of power supply.Power module is provided as+5V and+3.3V direct voltage, has the advantage of high isolation, high stability and low ripple.
CPU module and Switching Module and postnotum model calling, CPU module structure chart is see Fig. 3, CPU module comprises high speed microprocessor chip, runs embedded OS, externally provides USB interface, serial interface, Ethernet interface, RTC clock circuit and PCIE interface;
Wherein, high speed microprocessor chip carries out both-way communication, by the high transfer rate of PCIE Interface realization data interaction by PCIE interface and Switching Module;
CPU module carries out program upgrade by USB interface or Ethernet interface;
CPU module provides real-time clock signal by RTC clock circuit.
Switching Module and CPU module, postnotum module and ethernet transceiver model calling; Switching Module structure chart is see Fig. 4, and Switching Module comprises high density port exchange chip, externally provides PCIE interface, 24 road Media Independent Interfaces and port status interface.
High density port exchange chip carries out both-way communication by PCIE interface and high speed microprocessor chip;
Switching Module carries out both-way communication by 24 road Media Independent Interfaces and ethernet transceiver module;
Switching Module is by the blink states of the LED of port status Interface Controller pronotum module.
This Ethernet switch comprises 1 ethernet transceiver module, ethernet transceiver module and Switching Module, postnotum module and pronotum model calling.
Ethernet transceiver function structure chart, see Fig. 5, comprises ethernet transceiver in ethernet transceiver module, externally provides 8 road Media Independent Interfaces and 8 road Ethernet interfaces;
The ethernet transceiver of ethernet transceiver module carries out both-way communication by 8 road Media Independent Interfaces and high density port exchange chip;
The ethernet transceiver of ethernet transceiver module is by 8 road Ethernet interfaces and pronotum model calling;
Wherein, network transformer is provided with between the ethernet transceiver of ethernet transceiver module and 8 road Ethernet interfaces.
Pronotum module and CPU module and ethernet transceiver model calling.
Pronotum function structure chart is see Fig. 7, and pronotum module is provided with power interface, CPU module interface, Switching Module interface, ethernet transceiver module interface, USB port, serial port, debugging ethernet port, 8 road ethernet ports and the LED for showing 8 road ethernet port states.
Pronotum module is connected with power module by power interface, for power module provides electric energy;
Pronotum module is connected with CPU module by CPU module interface, and provides USB port, serial port and debugging ethernet port;
In the present embodiment, pronotum module adopts the external interface connector of universal, firm type, Anti-seismic, durable type, reliable and avoiding misinsertion type, namely above-mentioned USB port, serial port, debugging ethernet port, 8 road ethernet ports all adopt D to encode M12 connector.Power interface adopts A coding M12 connector, prevents power interface from mispluging.
Pronotum module is connected with Switching Module by Switching Module interface, and Switching Module is by the blink states of the LED of port status Interface Controller pronotum module;
Pronotum module is connected with ethernet transceiver module by ethernet transceiver module interface, and provides 8 road ethernet ports.
Postnotum function structure chart see Fig. 8, postnotum module and power module, CPU module, Switching Module and ethernet transceiver model calling,
Postnotum module by being connected with power module, for each module of this Ethernet switch provides electric energy;
Switching Module is connected with ethernet transceiver module by postnotum module, realizes the both-way communication between Switching Module and ethernet transceiver module.
Use this Ethernet switch to carry out the heavy linked method of signal transmitting and receiving and train to be:
1) CPU module configuration Switching Module, Real Time Protocol data packet format;
2) multichannel ethernet port receives Real Time Protocol data bag, and through ethernet transceiver module and Switching Module, the Real Time Protocol data bag received is passed to CPU module successively;
3) CPU module Real Time Protocol data frame, and the Real Time Protocol data bag after process is sent to the output of multichannel ethernet port through Switching Module and ethernet transceiver module successively.
Embodiment 2
Form substantially identical with the structure of the Ethernet switch of embodiment 1, distinguishing characteristics is: see Fig. 9, the Ethernet switch of embodiment 2 comprises 2 ethernet transceiver modules, ethernet transceiver is equipped with in each ethernet transceiver module, 2 ethernet transceivers externally provide totally 28 road Media Independent Interfaces and 28 road Ethernet interfaces, and namely this Ethernet switch externally can provide 16 road Media Independent Interfaces and 16 road Ethernet interfaces.
Embodiment 3
Form substantially identical with the structure of the Ethernet switch of embodiment 2, namely power module, CPU module, Switching Module, ethernet transceiver modular structure, pronotum module and postnotum module and composition are as embodiment 2, and distinguishing characteristics is:
See Figure 10, the Ethernet switch of embodiment 3 is also provided with bypass module except comprising 2 ethernet transceiver modules, and namely this Ethernet switch externally can provide 24 road Media Independent Interfaces and 24 road Ethernet interfaces.Bypass module structure chart is see Fig. 6, and bypass module comprises with bypass module too net transceiver, externally provides 8 road Media Independent Interfaces, 4 roadside road interfaces and 4 road Ethernet interfaces;
Bypass module ethernet transceiver carries out both-way communication by 8 road Media Independent Interfaces and high density port exchange chip;
Bypass module ethernet transceiver is by 4 road Ethernet interfaces and 4 roadside road interfaces and pronotum model calling, and pronotum module is provided with bypass module interface and 4 roadside road ports;
Wherein, network transformer is provided with between the ethernet transceiver of bypass module and 4 road Ethernet interfaces; Network transformer and relay is provided with between the ethernet transceiver of bypass module and 4 roadside road interfaces.
Switching Module is connected with bypass module by postnotum module, realizes the both-way communication between Switching Module and bypass module.
Embodiment 4
This Ethernet switch carries out signal transmitting and receiving and the heavy linked method of train can be used for train real-time Data Transmission.
Namely CPU module control data carries out periodicity and sporadic transmission, and provides transparent clock by the RTC clock circuit of CPU module; And according to train uniform time reference, receive Real Time Protocol data bag by multichannel ethernet port, this Real Time Protocol data handbag draws together periodic data and the sporadic data of trailer system and braking system, and carries out real-time Transmission to above-mentioned data; In data transmission procedure, CPU module detects the data do not transmitted in official hour, and sends Application Hints by multichannel ethernet port, to ensure that the data transfer cycles on train meets train demand.
Embodiment 5
This Ethernet switch carries out the heavy linked method of signal transmitting and receiving and train and can be used for train and heavily join.
I.e. step 2 in embodiment 1) in multichannel ethernet port receive Real Time Protocol data bag be neighbours' train node message, CPU module by neighbours' train node message acquisition neighboring switch nodal information; And will neighbours' train node message be received send to the switch of full train of vehicles, and obtain the topology information of full train of vehicles according to the neighbours' train node message received, topology information comprises full train of vehicles node, linear relationship and the heavy topology information such as attribute; Topology information according to obtaining arranges each module parameter of Ethernet switch, and the full train of vehicles topology information obtained is sent to train display node after user confirms, be sent to all mobile units by multichannel ethernet port, the train realizing full train of vehicles switch heavily joins.
Embodiment 6
This Ethernet switch carries out the data transaction that the heavy linked method of signal transmitting and receiving and train can be used for train net and vehicle net.
I.e. step 2 in embodiment 1) in multichannel ethernet port receive Real Time Protocol data bag be neighbours' train node message, after CPU module carries out logical operation process to train node message, form new train DBMS bag and send to all the other Ethernet switches by multichannel ethernet port; The train DBMS bag that all the other Ethernet switches receive is after CPU module carries out logical operation process to train node message, train node message is split as N number of packet, and the ethernet controller of corresponding train is sent to according to train logic, meet train net vehicle net two grade network control overflow, improve train level broadband utilance.
In above-described embodiment 1-3, pronotum module adopts the external interface connector of universal, firm type, Anti-seismic, durable type, reliable and avoiding misinsertion type, namely above-mentioned USB port, serial port, debugging ethernet port, multichannel ethernet port all adopt D to encode M12 connector.Power interface adopts A coding M12 connector, prevents power interface from mispluging.
This Ethernet switch, internal circuit adopts modularized design, expands flexibly and can support link aggregation, bypass, two layers of forwarding and three layers of routing function; External structure adopts case type design, adopts standard 19 inch rack, possesses electromagnetic shielding protection, meets relevant railway standard vibration and shock test requirement.
Compared with existing switch, system upgrade is carried out to this Ethernet switch and maintenance process is comparatively convenient.When regular maintenance and download program are carried out to switch, directly can connect USB interface that pronotum module provides and Ethernet interface completes, switch shell need not be opened, simplify train operator on-site maintenance flow process.
Claims (12)
1. vehicle-mounted Ethernet switch used for rail vehicle, be applied to bullet train, locomotive and city railway vehicle, it is characterized in that: this Ethernet switch comprises power module, CPU module, Switching Module, ethernet transceiver module, pronotum module and postnotum module;
Described CPU module and described Switching Module, described pronotum module and described postnotum model calling,
Described CPU module carries out both-way communication by PCIE interface and described Switching Module,
Described CPU module carries out program upgrade by USB interface or Ethernet interface,
Described CPU module provides real-time clock signal by RTC clock circuit;
Described Switching Module and described postnotum module, described pronotum module and described ethernet transceiver model calling,
Described Switching Module carries out both-way communication by 24 road Media Independent Interfaces and described ethernet transceiver module,
Described Switching Module is by the blink states of the LED of pronotum module described in port status Interface Controller;
Described ethernet transceiver module and described postnotum module and described pronotum model calling,
Described ethernet transceiver module carries out both-way communication by 8 road Media Independent Interfaces and described Switching Module,
Described ethernet transceiver module is by 8 road Ethernet interfaces and described pronotum model calling;
Described power module and postnotum model calling are described CPU module, described Switching Module and described ethernet transceiver module for power supply;
Described pronotum module and described CPU module and described ethernet transceiver model calling; And be provided with power interface, USB port, serial port, debugging ethernet port, multichannel ethernet port and the LED for showing multichannel ethernet port state.
2. vehicle-mounted Ethernet switch used for rail vehicle according to claim 1, it is characterized in that: this Ethernet switch at least comprises 1 ethernet transceiver module, be equipped with ethernet transceiver in each ethernet transceiver module, described ethernet transceiver externally provides at least 8 road Media Independent Interfaces and at least 8 road Ethernet interfaces; Network transformer is provided with between the ethernet transceiver of described ethernet transceiver module and 8 road Ethernet interfaces.
3. vehicle-mounted Ethernet switch used for rail vehicle according to claim 2, it is characterized in that: this Ethernet switch comprises 2 ethernet transceiver modules, be equipped with ethernet transceiver in each ethernet transceiver module, 2 ethernet transceivers externally provide totally 28 road Media Independent Interfaces and 28 road Ethernet interfaces; Network transformer is equipped with between each ethernet transceiver of described ethernet transceiver module and each 8 road Ethernet interfaces.
4. vehicle-mounted Ethernet switch used for rail vehicle according to claim 3, it is characterized in that: this Ethernet switch is also provided with bypass module, described bypass module comprises with bypass module too net transceiver, externally provides 8 road Media Independent Interfaces, 4 roadside road interfaces and 4 road Ethernet interfaces; Described bypass module and described Switching Module, described postnotum module and described pronotum model calling, described bypass module carries out both-way communication by 8 road Media Independent Interfaces and described Switching Module, described bypass module is by 4 road Ethernet interfaces and 4 roadside road interfaces and described pronotum model calling, and described pronotum module is provided with 4 roadside road ports; Network transformer is provided with between described bypass module ethernet transceiver and 4 road Ethernet interfaces; Network transformer and relay is provided with between described bypass module ethernet transceiver and 4 roadside road interfaces.
5. vehicle-mounted Ethernet switch used for rail vehicle according to claim 4, is characterized in that: described pronotum module is also provided with power interface, CPU module interface, Switching Module interface, ethernet transceiver module interface and bypass module interface,
Described pronotum module is connected with described power module by power interface, for power module provides electric energy;
Described pronotum module is connected with described CPU module by CPU module interface, and provides USB port, serial port and debugging ethernet port;
Described pronotum module is connected with described Switching Module by Switching Module interface, for controlling the blink states of described LED;
Described pronotum module is connected with described bypass module with described ethernet transceiver module with bypass module interface by ethernet transceiver module interface, and provides 24 road ethernet ports and 4 roadside road ports.
6. vehicle-mounted Ethernet switch used for rail vehicle according to claim 1; it is characterized in that: described power module comprises 2 tunnels independently electromagnetic compatibility protective circuit and front end power module; there are 2 road redundant inputs, when a road power supply circuits fault, can be powered by another power supply circuits.
7. vehicle-mounted Ethernet switch used for rail vehicle according to claim 1, is characterized in that: described CPU module comprises high speed microprocessor chip, externally provides USB interface, serial interface, Ethernet interface, RTC clock circuit and PCIE interface; Described high speed microprocessor chip carries out both-way communication by PCIE interface and described Switching Module.
8. vehicle-mounted Ethernet switch used for rail vehicle according to claim 7, is characterized in that: described Switching Module comprises high density port exchange chip, externally provides PCIE interface, 24 road Media Independent Interfaces and port status interface; Described high density port exchange chip carries out both-way communication by PCIE interface and described high speed microprocessor chip.
9. vehicle-mounted Ethernet switch signal transmitting and receiving used for rail vehicle as claimed in claim 1 and the heavy linked method of train, is characterized in that comprising following methods step:
1) CPU module configuration Switching Module, Real Time Protocol data packet format;
2) multichannel ethernet port receives Real Time Protocol data bag, and through ethernet transceiver module and Switching Module, the Real Time Protocol data bag received is passed to CPU module successively;
3) CPU module Real Time Protocol data frame, and the Real Time Protocol data bag after process is sent to the output of multichannel ethernet port through Switching Module and ethernet transceiver module successively.
10. vehicle-mounted Ethernet switch signal transmitting and receiving used for rail vehicle according to claim 9 and the heavy linked method of train, it is characterized in that: comprise train Real-time Data Transfer Method, namely CPU module control data carries out periodicity and sporadic transmission, and provides transparent clock; Step 2) in multichannel ethernet port receive Real Time Protocol data handbag draw together periodic data and sporadic data; In data transmission procedure, CPU module detects the data do not transmitted in official hour, and sends Application Hints by multichannel ethernet port.
11. vehicle-mounted Ethernet switch signal transmitting and receivings used for rail vehicle according to claim 9 and the heavy linked method of train, it is characterized in that: comprise the heavy linked method of train, i.e. step 2) in the Real Time Protocol data handbag that receives of multichannel ethernet port draw together neighbours' train node message, CPU module obtains the nodal information of neighboring switch by neighbours' train node message; And will neighbours' train node message be received send to the switch of full train of vehicles, and obtain the topology information of full train of vehicles according to the neighbours' train node message received; Topology information according to obtaining arranges each module parameter of Ethernet switch, and the full train of vehicles topology information obtained is sent to train display node after user confirms, be sent to all mobile units by multichannel ethernet port, the train realizing full train of vehicles heavily joins.
12. vehicle-mounted Ethernet switch signal transmitting and receivings used for rail vehicle according to claim 9 and the heavy linked method of train, it is characterized in that: the data transfer device comprising train net and vehicle net, i.e. step 2) in multichannel ethernet port receive Real Time Protocol data bag be neighbours' train node message, after CPU module carries out logical operation process to train node message, form new train DBMS bag and send to all the other Ethernet switches by multichannel ethernet port; Train node message, after CPU module carries out logical operation process to train node message, is split as N number of packet, and sends to the ethernet controller of corresponding train according to train logic by the train DBMS bag that all the other Ethernet switches receive.
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| CN108282370A (en) * | 2018-01-30 | 2018-07-13 | 合肥同智机电控制技术有限公司 | A kind of hardware based network data interchanging system |
| CN108667541A (en) * | 2018-04-11 | 2018-10-16 | 大连理工大学 | A kind of train digital broadcast controller based on HomePlug |
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| CN111586498A (en) * | 2020-05-09 | 2020-08-25 | 贵州航天天马机电科技有限公司 | Multichannel high-speed data exchange equipment |
| CN112298280A (en) * | 2020-10-20 | 2021-02-02 | 中车青岛四方机车车辆股份有限公司 | Locomotive reconnection method and system and locomotive |
| CN112298280B (en) * | 2020-10-20 | 2022-12-23 | 中车青岛四方机车车辆股份有限公司 | Locomotive reconnection method and system and locomotive |
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