CN106483938A - Train communication equipment - Google Patents
Train communication equipment Download PDFInfo
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- CN106483938A CN106483938A CN201510549071.1A CN201510549071A CN106483938A CN 106483938 A CN106483938 A CN 106483938A CN 201510549071 A CN201510549071 A CN 201510549071A CN 106483938 A CN106483938 A CN 106483938A
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- 238000004891 communication Methods 0.000 title claims abstract description 70
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 15
- 238000012546 transfer Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
- G05B19/41855—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication by local area network [LAN], network structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Small-Scale Networks (AREA)
Abstract
The present invention provides a kind of train communication equipment, including：Main control module and ethernet module, main control module is used for for the first serial data being sent to ethernet module, carries train operating data in the first serial data；Ethernet module is sent to host computer for the first serial data is converted to the first Ethernet data.The train communication equipment that the present invention provides, it is achieved that ethernet communication between main control module and host computer, effectively raises communication reliability data transmission speed.
Description
Technical field
The present invention relates to communication technology, more particularly, to a kind of train communication equipment.
Background technology
In the middle of the technology of track traffic such as light rail, railcar, the control of the equipment such as train traction, train auxiliary
The parameter state of mainboard processed, data transmission state directly affect the control effect of train, simultaneously also to control
Scheme is realized, fault diagnosis discovery is significant, and therefore commissioning staff is frequently necessary to utilize host computer
Collection, the service data of detection control mainboard, the operation conditions of real-time inspection and control mainboard.Debugging
Cheng Zhong, the reliability of communication, the speed of data transfer are most important.
The data acquisition of the existing control mainboard to equipment such as train traction, auxiliary, adopt of detection are gone here and there more
Row communication technology, using RS232 and RS485 interface more than interface.Commissioning staff passes through the string on host computer
Mouth debugging software observes the instantaneous value of control mainboard special parameter, the parameter state knowing vehicle with this, number
Whether normal according to aspects such as transmission states, and by AccessPort software, the parameter of control mainboard is repaiied
Change the running status thus control device.
The debugging technique of existing this employing serial communication, in debugging process, serial line interface is due to adjusting
, often the situation of interface damage, and in telecommunication, communication quality cannot ensure in examination environmental complexity,
Communication reliability is low；Meanwhile, the transfer rate of serial communication still falls within relatively slowly to a certain extent, no
Method meets the real-time monitoring system of particular case.
Content of the invention
For the drawbacks described above of prior art, the present invention provides a kind of train communication equipment, logical in order to improve
Letter reliability data transmission speed.
The present invention provides a kind of train communication equipment, including：Main control module and ethernet module, master control mould
Block is connected with ethernet module；Wherein,
Main control module, for the first serial data is sent to ethernet module, takes in the first serial data
Band train operating data；
Ethernet module, is sent to host computer for the first serial data is converted to the first Ethernet data.
In one embodiment of this invention, ethernet module includes：Ethernet controller and Ethernet interface；
Ethernet controller connects Ethernet interface；
Ethernet controller, for the first serial data is converted to the first Ethernet data, and by with
Too network interface is sent to host computer；
Ethernet interface, for connecting host computer.
In one embodiment of this invention, main control module is Digital Signal Processing dsp controller, and DSP is controlled
Device processed is connected with ethernet controller by serial peripheral equipment interface SPI bus.
In one embodiment of this invention, ethernet module also includes：Isolating transformer；Ethernet controls
Device is connected with Ethernet interface by isolating transformer；
Isolating transformer, for isolating ethernet controller.
In one embodiment of this invention, ethernet module also includes：Ethernet protection circuit, isolation becomes
Depressor is connected with Ethernet interface by Ethernet protection circuit；
Ethernet protection circuit, for protecting ethernet module.
In one embodiment of this invention, ethernet module also includes：Wireless router, wireless router
Connect Ethernet interface；
Wireless router, for wirelessly transmitting the Ethernet data obtaining from Ethernet interface
To host computer.
In one embodiment of this invention, ethernet controller, is additionally operable to receive second that host computer sends
Ethernet data, and the second Ethernet data is converted to the second serial data is sent to main control module, its
In, carry train debug command in the second Ethernet data.
In one embodiment of this invention, main control module, is additionally operable to receive the second serial data, and according to
Second serial data controls the running status of train.
In one embodiment of this invention, main control module is using built-in network communication protocol uIP simplified
Protocol stack.
The train communication equipment that the present embodiment provides, main control module carries train operating data by obtain
The first serial data be sent to ethernet module；Ethernet module receives the first of main control module transmission
After serial data, by the first serial data be converted to the first Ethernet data be sent to host computer it is achieved that
Ethernet communication between main control module and host computer.The train adopting ethernet communication in the present embodiment leads to
Letter equipment, effectively raises communication reliability data transmission speed.
Brief description
The structural representation of the train communication apparatus embodiments one that Fig. 1 provides for the present invention；
The structural representation of the train communication apparatus embodiments two that Fig. 2 provides for the present invention；
The structural representation of the train communication apparatus embodiments three that Fig. 3 provides for the present invention；
The circuit theory diagrams of the train communication apparatus embodiments four that Fig. 4 provides for the present invention.
Description of reference numerals：
100- main control module；200- ethernet module；
210- ethernet controller；220- isolating transformer；
230- Ethernet protection circuit；240- Ethernet interface；
250- wireless router.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with this
Accompanying drawing in bright embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under the premise of not making creative work
The every other embodiment obtaining, broadly falls into the scope of protection of the invention.
Train communication equipment provided in an embodiment of the present invention is it is intended to solve the tune of existing employing serial communication
The low technical problem of communication reliability low data transfer rate in examination technology.
With specifically embodiment, technical scheme is described in detail below.These tools below
The embodiment of body can be combined with each other, may be in some embodiments for same or analogous concept or process
Repeat no more.
The structural representation of the train communication apparatus embodiments one that Fig. 1 provides for the present invention, as shown in figure 1,
Train communication equipment in the present embodiment includes：Main control module 100 and ethernet module 200, master control mould
Block 100 is connected with ethernet module 200；Wherein, main control module 100, for by the first serial data
It is sent to ethernet module 200, in the first serial data, carry train operating data；Ethernet module 200,
It is sent to host computer for the first serial data is converted to the first Ethernet data.
Specifically, main control module 100 can be Digital Signal Processing (Digital Signal Processing,
DSP) controller or Advance RISC Machine (Advanced RISC Machines, ARM) controller etc.,
Specifically can apply in the control mainboard of the train apparatus such as train traction, auxiliary, network, set with controlling
Standby operation.Main control module 100 can obtain train operating data by peripheral circuit, and train is transported
Row data carries in the first serial data, by between main control module 100 and ethernet module 200
Serial bus transmission is to ethernet module 200.Wherein, train operating data include train running information and
Train fault information etc., host computer according to the running status that these train operating data can know train is
No normal, and accordingly train is debugged.
After ethernet module 200 receives the first serial data of main control module 100 transmission, can be by the
Serial datum is converted to Ethernet data (i.e. the first Ethernet data), is sent to by Ethernet
Position machine, to realize the ethernet communication between main control module 100 and host computer.
In prior art, train debugging adopts serial communication, because debugging enironment is more complicated, easily goes out
The situation that existing interface damages, and transmission range is short, in telecommunication, communication quality cannot ensure, it leads to
Letter Reliability comparotive is low；And the train communication equipment in the present embodiment, main control module will carry train fortune
First serial data of row data is first sent to ethernet module, and ethernet module receives main control module and sends out
After the first serial data sent, by the first serial data be converted to the first Ethernet data be then forwarded to upper
Machine, it is achieved that ethernet communication between main control module and host computer, compares serial line interface, Ethernet connects
Mouth is stable, is hardly damaged, and long transmission distance, and stability is strong, ensure that the communication of telecommunication
Quality, the communication reliability of equipment is higher.Additionally, the transfer rate of serial communication is to a certain extent still
So belong to relatively slow, using serial communication it is impossible to meet the real-time monitoring system of particular case in prior art；
And in the present embodiment, train communication equipment adopts ethernet communication, the transfer rate of ethernet communication is far high
In the transfer rate of serial communication, it can meet the real-time monitoring system of various situations.
The train communication equipment that the present embodiment provides, main control module carries train operating data by obtain
The first serial data be sent to ethernet module；Ethernet module receives the first of main control module transmission
After serial data, by the first serial data be converted to the first Ethernet data be sent to host computer it is achieved that
Ethernet communication between main control module and host computer.The train adopting ethernet communication in the present embodiment leads to
Letter equipment, effectively raises communication reliability data transmission speed.
The structural representation of the train communication apparatus embodiments two that Fig. 2 provides for the present invention, the present embodiment is
The further function of ethernet module 200 in above-mentioned embodiment illustrated in fig. 1 is refined.As shown in Fig. 2
In the present embodiment, ethernet module 200 includes：Ethernet controller 210 and Ethernet interface 240；
Ethernet controller 210 connects Ethernet interface 240；Ethernet controller 210, for by the first serial
Data is converted to the first Ethernet data, and is sent to host computer by Ethernet interface 240；Ethernet
Interface 240, for connecting host computer.
Specifically, ethernet controller 210 can be to be integrated with media access control layer (Media Access
Control, MAC) and physical layer (Physical layer, PHY) ethernet control chip；Ether
Network interface 240 can be M12 interface or RJ45 interface etc., preferably employs M12 interface in the present embodiment,
To improve the reliability of data transfer.
Ethernet controller 210 the first serial data that main control module 100 sends is converted to be suitable for
Too after the Ethernet data (i.e. the first Ethernet data) of transfers on network, will by Ethernet interface 240
This first Ethernet data is sent to host computer, and wherein, Ethernet data specifically can adopt differential signal
Form transmission.
Preferably, main control module 100 can be dsp controller, and dsp controller is connect by serial peripheral
Mouth (Serial Peripheral Interface, SPI) bus is connected with ethernet controller 210.
Specifically, dsp controller can select existing various dsp chips, DSP according to process demand
Controller realizes the data interaction and ethernet controller 210 between especially by spi bus.
The train communication equipment that the present embodiment provides, the first string that main control module is sent by ethernet controller
After row data is converted to the first Ethernet data being suitable for transmitting over ethernet, will by Ethernet interface
This first Ethernet data is sent to host computer it is achieved that ether Netcom between main control module and host computer
Letter, improves communication reliability data transmission speed.
The structural representation of the train communication apparatus embodiments three that Fig. 3 provides for the present invention, the present embodiment is
Optimization further to ethernet module in above-described embodiment 200.As shown in figure 3, in the present embodiment,
Ethernet module 200 also includes：Isolating transformer 220；Ethernet controller 210 passes through to isolate transformation
Device 220 is connected with Ethernet interface 240；Isolating transformer 220, for isolating ethernet controller 210.
Specifically, it is connected isolating transformer 220 between ethernet controller 210 and Ethernet interface 240,
So that ethernet controller 210 is isolated from the outside, protect ethernet controller 210 from external disturbance,
Play voltage buffer action；Suitable isolating transformer can be selected to realize signal according to circuit design simultaneously
Enhancing, the effect of impedance matching.
Optionally, ethernet module 200 can also include：Ethernet protection circuit 230, isolates transformation
Device 220 is connected with Ethernet interface 240 by Ethernet protection circuit 230；Ethernet protection circuit 230,
For protecting ethernet module 200.
Specifically, Ethernet protection circuit 230 can select existing various transient voltage suppressor diodes
(Transient Voltage Suppressor, TVS) protection circuit, for suppressing induced voltage to increase sharply,
The impact to circuit such as electrostatic, plays the effect of protection train communication equipment.
Optionally, ethernet module 200 can also include：Wireless router 250, wireless router 250
Connect Ethernet interface 240；Wireless router 250, for the ether that will obtain from Ethernet interface 240
Network data is wirelessly transferred to host computer.
Specifically, department's control room limited space of setting host computer, and the debugging of existing employing serial communication
Technology needs to lay a plurality of data lines, occupies big quantity space, brings inconvenience to the operation of commissioning staff；
In the present embodiment, wireless router 250 is connected on Ethernet interface 240 it is achieved that main control module 100
Radio communication and host computer between, it need not lay netting twine, solve well in prior art and adopt
And the unhandy problem of commissioning staff causing, strong applicability.
On the basis of above-described embodiment, ethernet controller 210, it is additionally operable to receive what host computer sent
Second Ethernet data, and the second Ethernet data is converted to the second serial data is sent to main control module
100, main control module 100, it is additionally operable to receive the second serial data, and row are controlled according to the second serial data
The running status of car, wherein, carries train debug command in the second Ethernet data.
Specifically, host computer can send train debug command by Ethernet, for example：Obtain train fortune
The order of row state, the order downloading fault, order of setting train runing parameters etc., ethernet module
After ethernet controller 210 in 200 receives the second Ethernet data carrying train debug command,
This second Ethernet data is converted to and after the second serial data, is sent to main control module 100.
After main control module 100 receives the second serial data, according to the difference of train debugging instruction, permissible
Send train operating data to host computer it is also possible to train runing parameters are arranged according to train debug command,
To control the running status of train.
Additionally, programming program can also be sent to main control module 100, master control by Ethernet by host computer
Module 100 receives programming program and then realizes the program burn writing to main control module 100.
On the basis of any of the above-described embodiment, above-mentioned main control module 100 can be embedded using simplify
Network communication protocol uIP protocol stack, to save the internal memory of main control module 100, strengthens the steady of communication simultaneously
Qualitative.
The train communication equipment that the present embodiment provides, is connected between ethernet controller and Ethernet interface
Isolating transformer, serves the effect of voltage isolation, signal enhancing and impedance matching；Meanwhile, in isolation
Be connected Ethernet protection circuit between transformator and Ethernet interface it is suppressed that induced voltage increase sharply, electrostatic
Deng the impact to circuit, serve the effect of protection train communication equipment.
The circuit theory diagrams of the train communication apparatus embodiments four that Fig. 4 provides for the present invention, the present embodiment is
A kind of specific circuit implementation of above-described embodiment, as shown in figure 4, in the present embodiment, master control mould
Block is the dsp chip (not shown) of TMS32028335 model, and ethernet controller is specially ENC28J60
The Ethernet chip of model, isolating transformer is specially the transformator of HN16613 model, and Ethernet is protected
Circuit is specially the TVS pipe of SLVU2.8-4 model, and Ethernet interface is specially the M12 of M12-D model
Interface.Annexation ethernet control chip and each device between is specifically described below.
Ethernet chip connects main control module 100 by SPI interface, and specifically, SPI interface includes：String
Row output SO, serial input SI, clock SCK, piece choosing/CS (Low level effective), wherein, SO
Be connected with the SPISOMIA of dsp chip, SI is connected with the SPISIMOA of dsp chip, SCK with
The SPICLKA of dsp chip is connected, and/CS is connected with the SCITXDC of dsp chip.Dsp chip leads to
Cross SI and SO and carry out data interaction with Ethernet chip, provide number by SCK to ethernet control chip
According to transmission clock, pass through/CS select Ethernet chip whether effective.Meanwhile, dsp chip passes through SI
The internal register of ethernet control chip can be configured with SO, to arrange the work of Ethernet
Pattern.Additionally, the two of Ethernet chip LED pin LEDA and LEDB connect
LED driven by sink current, by the configuration of the internal register to Ethernet chip for the dsp chip,
Can according to the working condition of the flicker condition discrimination chip of LED (for example：Send data, receiving data,
Non- transceiving data).In addition, the interface such as the interruption/INT of Ethernet chip, reset/RST can also be with
Dsp chip connects, to realize the functions such as interruption, reset.
Two interfaces of TPOUT+ and TPOUT- of Ethernet chip are respectively used to output difference signal
Two interfaces of TPOUT2+ and TPOUT2-, TPIN+ and TPIN- are used for input differential signal TPIN2+
And TPIN2-, Ethernet chip passes through TPOUT+, TPOUT- and TPIN+, TPIN- connects isolation and becomes
The primary side of depressor, wherein TPOUT+ connect the pin 1 of isolating transformer, TPOUT- connects isolation and becomes
The pin 3 of depressor, TPIN+ connect the pin 6 of isolating transformer, TPIN- connects the pipe of isolating transformer
Foot 8.
The pin 1 of isolating transformer and pin 3 are respectively used to receive the differential signal of Ethernet chip output
TPOUT2+ and TPOUT2-, corresponding, the pin 16 of isolating transformer and pin 14 are respectively used to defeated
Go out isolating difference signal TX2+ and TX2-.The pin 6 of isolating transformer and pin 8 be respectively used to
Too web-roll core piece output difference signal TPIN2+ and TPIN2-, corresponding, pin 11 He of isolating transformer
Pin 9 is respectively used to receive ethernet signal RX2+ and RX2-.
Ethernet protection circuit (hereinafter referred to as TVS pipe) connects the primary side of isolating transformer, wherein
The pin 1 of TVS pipe connects the pin 16 of isolating transformer, for receipt signal TX2+；TVS pipe
Pin 2 connects the pin 14 of isolating transformer, for receipt signal TX2-；The pin 3 of TVS pipe is even
Connect the pin 11 of isolating transformer, for output signal RX2+；The pin 4 of TVS pipe connects isolation and becomes
The pin 9 of depressor, for output signal RX2-.
Ethernet interface adopts M12 interface, and M12 interface is connected with TVS pipe, wherein, M12 interface
Pin 2 connect TVS pipe pin 6, for output signal RX2+；The pin 4 of M12 interface is even
Connect the pin 5 of TVS pipe, for output signal RX2-；The pin 1 of M12 interface connects TVS pipe
Pin 8, for receipt signal TX2+；The pin 3 of M12 interface connects the pin 7 of TVS pipe, is used for
Receipt signal TX2-.
It should be noted that the model of each device is intended only as a kind of example in Fig. 4, specifically can basis
It is actually needed selection；Additionally, various resistance, electric capacity etc. can be connected in circuit according to circuit design demand
Device, the device such as the resistance connecting in circuit shown in Fig. 4, electric capacity is all intended only as a kind of example, specifically
Can select according to actual needs.
The concrete operating principle of train communication equipment and technique effect and above-described embodiment that the present embodiment provides
Similar, here is omitted.
Finally it should be noted that：Various embodiments above is only in order to illustrating technical scheme rather than right
It limits；Although being described in detail to the present invention with reference to foregoing embodiments, this area common
Technical staff should be understood：It still can be modified to the technical scheme described in foregoing embodiments,
Or equivalent is carried out to wherein some or all of technical characteristic；And these modifications or replacement, and
Do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (9)
1. a kind of train communication equipment is it is characterised in that include：Main control module and ethernet module, institute
State main control module to be connected with described ethernet module；Wherein,
Described main control module, for the first serial data is sent to described ethernet module, described first
Train operating data is carried in serial data；
Described ethernet module, sends for described first serial data is converted to the first Ethernet data
To host computer.
2. train communication equipment according to claim 1 is it is characterised in that described ethernet module
Including：Ethernet controller and Ethernet interface；Described ethernet controller connects described Ethernet interface；
Described ethernet controller, for described first serial data is converted to the first Ethernet data,
And described host computer is sent to by described Ethernet interface；
Described Ethernet interface, for connecting described host computer.
3. train communication equipment according to claim 2 is it is characterised in that described main control module is
Digital Signal Processing dsp controller, described dsp controller passes through serial peripheral equipment interface SPI bus and institute
State ethernet controller to connect.
4. train communication equipment according to claim 3 is it is characterised in that described ethernet module
Also include：Isolating transformer；Described ethernet controller passes through described isolating transformer and described Ethernet
Interface connects；
Described isolating transformer, for isolating described ethernet controller.
5. train communication equipment according to claim 4 is it is characterised in that described ethernet module
Also include：Ethernet protection circuit, described isolating transformer by described Ethernet protection circuit with described
Ethernet interface connects；
Described Ethernet protection circuit, for protecting described ethernet module.
6. train communication equipment according to claim 5 is it is characterised in that described ethernet module
Also include：Wireless router, described wireless router connects described Ethernet interface；
Described wireless router, for the described Ethernet data that will obtain from described Ethernet interface with no
The mode of line is transferred to described host computer.
7. train communication equipment according to claim 4 is it is characterised in that described Ethernet controls
Device, is additionally operable to receive the second Ethernet data that described host computer sends, and by described second ether netting index
It is sent to described main control module according to being converted to the second serial data, wherein, in described second Ethernet data
Carry train debug command.
8. train communication equipment according to claim 7 is it is characterised in that described main control module,
It is additionally operable to receive described second serial data, and control the operation shape of train according to described second serial data
State.
9. the train communication equipment according to any one of claim 1-8 is it is characterised in that described master
Control module is using the built-in network communication protocol uIP protocol stack simplified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510549071.1A CN106483938A (en) | 2015-08-31 | 2015-08-31 | Train communication equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510549071.1A CN106483938A (en) | 2015-08-31 | 2015-08-31 | Train communication equipment |
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| CN106483938A true CN106483938A (en) | 2017-03-08 |
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| CN201510549071.1A Pending CN106483938A (en) | 2015-08-31 | 2015-08-31 | Train communication equipment |
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| CN205003537U (en) * | 2015-08-31 | 2016-01-27 | 北车大连电力牵引研发中心有限公司 | Train communication equipment |
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| CN101340357A (en) * | 2007-07-06 | 2009-01-07 | 方大集团股份有限公司 | Debugging simulation system and method for remote monitoring terminal of subway safe door system |
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Application publication date: 20170308 |