CN108418904A - Ethernet communication control device and fully-mechanized mining working communication network - Google Patents
Ethernet communication control device and fully-mechanized mining working communication network Download PDFInfo
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- CN108418904A CN108418904A CN201810570505.XA CN201810570505A CN108418904A CN 108418904 A CN108418904 A CN 108418904A CN 201810570505 A CN201810570505 A CN 201810570505A CN 108418904 A CN108418904 A CN 108418904A
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- 238000005065 mining Methods 0.000 title claims abstract description 20
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering 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
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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
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
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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
- H04L2012/40221—Profibus
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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
- H04L41/08—Configuration management of networks or network elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The present invention relates to a kind of ethernet communication control device and fully-mechanized mining working communication networks, belong to Ethernet field.A kind of ethernet communication control device, including a chips of Ethernet exchange, two essential safe type isolation coupling units communicated to connect respectively with two two core physical layer interfaces of the chips of Ethernet exchange, a communication function management configuration unit communicated to connect with the chips of Ethernet exchange；The signal that two two core physical layer interfaces of the chips of Ethernet exchange are sent out is by being connected to external cable or cable connector after the essential safe type isolation coupling unit, and described two two cores physical layer interfaces with one master one from pattern work, wherein the clock of the two core physical layer interface of time clock tracking master from two core physical layer interfaces.The present invention uses two core interfaces, and for the bandwidth of the face communication network of composition up to 100Mbp, 1000Mbps is even higher.
Description
Technical field
The present invention relates to Ethernet field, more particularly to a kind of ethernet communication control device and fully-mechanized mining working communication network
Network.
Background technology
With the continuous growth of coal mine fully-mechanized mining working equipment and system automation and intelligent demand, cloth along working face
In hundreds hydraulic bracket controller, a large amount of IP cameras and the working face set between various sensing supervision equipments, and pass through
Entire working face is worn to there are the demands of the data transmission of magnanimity between the monitoring host computer of equipment lane.Currently, having both at home and abroad including general
Various wired, wireless communication techniques including logical Industrial Ethernet are obtained after various Explosion-proof Design measures by taking in working face
Using.As shown in patent CN102136974A, CN102780597A and CN 106507051A, using four core electric interfaces
100Mbps, 8 core electric interfaces 1000Mbps ethernet technology and the standards such as 100BASE-FX single mode and multimode fibre
Ethernet technology, the power line based on standards such as HomePlugAV shown in patent CN203747819U and CN103763522A carry
Wave communication system, and the working face wireless system as shown in patent CN104506799A, CN205610955U etc., have been applied
Network communication between the unit of working face.
But underground coal mine is a kind of more special environment, especially its fully-mechanized mining working exist explosive gas and
Coal dust, bad environments, to communication equipment and systematic difference, there are many particular/special requirements.Communication between working face network node away from
It is only several meters to tens meters shorter from generally, but interstitial content is more, connection cables up to hundreds of, it is above-mentioned to use 4 cores
The industrial Ethernet technology of 100Mbps and 8 core 1000Mbps electric interfaces, in frequent water drenching, humidity is big, coal slime is seriously polluted
Under environment on coalface, the system that multistage (such as grades up to a hundred between bracket controller) connection is formed, due to needs cable core and
The more reliability of connector core number is poor, and core number causes the cost of cable and connector higher more.Working face fiber optic communication,
Because optical interface connector is easy to be used by coal dust, coal slime pollution effect, and need special optical fiber tool that could connect after disconnected fibre,
Inconvenient for use in underground, cost is higher.System based on power line carrier be averaged each broadband interface power supply power consumption it is very high, be
5~10 times of common Ethernet interface are unfavorable for the inbeing safe explosion prevention design of system, and single domain receiving number of nodes is low,
And bus broadcast type transmission mode is when that the more Time Bandwidth of number of nodes declines is more serious.Wireless multinode Transmission system is then band
Wide universal relatively low, available bandwidth generally can only be to tens, and fully mechanized mining work that is intensive in metal equipment and arranging dynamic change
Make in the application of face, connection reliability is weak and transmission delay is larger.
Therefore, now there is an urgent need for a kind of interface core number is few, bandwidth is up to 100Mbp, bandwidth communication even higher 1000Mbps
Technology builds more easy to use, reliability and general or multipurpose working face network application more adaptable with support..
Invention content
It is an object of the invention in view of the above-mentioned problems, providing a kind of ethernet communication control device and fully-mechanized mining working
Communication network, using two core interfaces, for bandwidth up to 100Mbp, 1000Mbps is even higher.
The object of the present invention is achieved like this：
A kind of ethernet communication control device, including：
One chips of Ethernet exchange, the chips of Ethernet exchange have at least two to support BroadR-Reach
Or two core physical layer interface of 100BASE-T1 or 1000BASE-T1；
Two essential safeties communicated to connect respectively with two two core physical layer interfaces of the chips of Ethernet exchange
Type isolation coupling unit；And
One communication function management configuration unit communicated to connect with the chips of Ethernet exchange, the communication function
Management configuration unit to the two cores physical layer interface and Ethernet exchanging function for being managed configuration；
The signal that two two core physical layer interfaces of the chips of Ethernet exchange are sent out passes through the essential safe type
External cable or cable connector are connected to after isolation coupling unit, and described two two cores physical layer interfaces are with a master one
From pattern work, wherein the clock of the two core physical layer interface of time clock tracking master from two core physical layer interfaces.
Preferably, the two cores physical layer interface is to be based on BroadR-Reach or 100BASE-T1 or 1000BASE-T1
Two core physical layer interface chips, the two cores physical layer interface chip passes through MII (Medium Independent
Interface, medium independent interface) interface of type connect with the chips of Ethernet exchange；Alternatively, the two cores physics
Layer interface is the two core physical layer interface of integrated-type based on BroadR-Reach or 100BASE-T1 or 1000BASE-T1, described
Two core physical layer interface of integrated-type is embedded in the inside of the chips of Ethernet exchange.The interface of the MII types is common
There are MII, RMII, SMII, SSMII, SSSMII, GMII, RGMII, SGMII, TBI, RTBI, XGMII etc..
Preferably, the communication function management configuration unit is microcontroller or embedded type CPU；
When the communication function management configuration unit is microcontroller, the chips of Ethernet exchange at least also has one
A MII interface, RMII interfaces or SMI interfaces for being connect with the microcontroller, the microcontroller by the MII interfaces,
RMII interfaces or SMI interfaces realize the communication connection with the chips of Ethernet exchange, and then realize and two two cores
The communication connection of physical layer interface；Alternatively, the microcontroller is directly handed over the Ethernet by SPI interface or SMI interfaces
It changes planes chip and two two cores physical layer interfaces realizes communication interconnection；
When the communication function management configuration unit is embedded type CPU, the embedded type CPU is integrated in the Ethernet
In the internal processor of exchanger chip.
Preferably, the essential safe type isolation coupling unit be high frequency transformer, the primary side of the high frequency transformer with
Industrial frequency withstand voltage is more than intrinsic safety standard specified value between secondary side；Alternatively,
The essential safe type isolation coupling unit is two two core wires for being connected on the two cores physical layer interface respectively
The Capacitor apart and signal coupler of road, the Capacitor apart are more than intrinsic safety standard with signal coupler by least two pressure resistances
The solid capacitor of specified value is composed in series.
Preferably, the chips of Ethernet exchange also have at least one interface, the interface for expanding communication with
Monitoring application.
Preferably, described device is powered using intrinsically safe power supply.
The invention also discloses a kind of fully-mechanized mining working communication network, the fully-mechanized mining working communication network is by least two
Ethernet communication control device as described in any one of aforementioned is connected in series, adjacent two ethernet communication control dresses
It is realized and is connected by the two cores physical layer interface between setting, and one two in two two core physical layer interfaces being together in series
Two core physical layer interface based on core physical layer interface, another is from two core physical layer interfaces.
Preferably, the ethernet communication control device being together in series is powered using intrinsically safe power supply all the way, or
Person is using the mutually isolated intrinsically safe power supply power supply of multichannel.
Beneficial effects of the present invention are：
1) two core physical layer interfaces of ethernet communication control device of the present invention are connected with essential safe type isolation coupling
Unit is closed, composition fully-mechanized mining working communication network can be connected directly by external two cores communication interface, without being separately provided
Intrinsic safety type isolation coupling device, you can meet the requirement of coal mine explosion-proof standard.
2) network technology that ethernet communication control device of the present invention uses is in addition to physical layer interface, remaining
MAC layer and other network protocol layers are identical with common Ethernet, to upper layer network using fully transparent and compatibility, can send out
Wave all advantages of ethernet communication technology；
3) the fully-mechanized mining working communication network of ethernet communication control device composition of the present invention, it is only necessary to which two cores are electrical
The broadband communications for achieving that up to 100Mbps or 1000Mbps are attached, it is required compared with the technology of conventional Ethernet
The core number of communication cable and connector can reduce half (relative to 4 core 100BASE-TX Ethernets) or 3/4ths (relative to 8
Core 1000BASE-T Ethernets), simplify connection, promote working face network application reliability, reduces working service cost；
4) the fully-mechanized mining working communication network of ethernet communication control device composition of the present invention, each ethernet communication control
Device processed can make to power using different intrinsically safe power supplies.
Description of the drawings
Fig. 1 shows the structural schematic diagram of ethernet communication control device embodiment one of the present invention；
Fig. 2 shows the structures of one embodiment of communication function management configuration unit in ethernet communication control device of the present invention
Schematic diagram；
Fig. 3 shows the structural schematic diagram of ethernet communication control device embodiment two of the present invention；
Fig. 4 shows the structural schematic diagram of ethernet communication control device embodiment three of the present invention；
Fig. 5 shows the structural schematic diagram of one embodiment of fully-mechanized mining working communication network of the present invention.
Specific implementation mode
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.
First, the present invention proposes a kind of ethernet communication control device 100.
In embodiment one, as shown in Figure 1, the ethernet communication control device 100 includes an Ethernet exchanging
101, two essential safe type isolation coupling units 105,106 of movement piece and a communication function management configuration unit 106.
The chips of Ethernet exchange 101 have at least two support BroadR-Reach or 100BASE-T1 or
Two core physical layer interfaces 103,104 of 1000BASE-T1.Specifically, the two cores physical layer interface 103,104 can be based on
BroadR-Reach or 100BASE-T1 or 1000BASE-T1 two core physical layer interface chips (such as model 88Q2110 or
The interface chip of 88Q2112), it is connect with the chips of Ethernet exchange 101 by GMII, RGMII or SGMII；Alternatively, institute
It can be integrated based on BroadR-Reach or 100BASE-T1 or 1000BASE-T1 to state two core physical layer interfaces 103,104
Two core physical layer interface of type, is embedded in the inside of the chips of Ethernet exchange 101.
Described two essential safe type isolation coupling units 105,106 respectively with the chips of Ethernet exchange 101
Two two core physical layer interfaces 103,104 communication connections.
Specifically, the essential safe type isolation coupling unit 105,106 can be high frequency transformer, but the high frequency becomes
Industrial frequency withstand voltage has to be larger than intrinsic safety standard specified value between the primary and secondary side of depressor.The essential safe type isolation coupling unit
105,106 can also use two capacitances being connected on respectively on two coring circuits of the two cores physical layer interface 103,104 every
From with signal coupler, it is specific as shown in Fig. 2, the Capacitor apart is more than intrinsic safety mark with signal coupler by least two pressure resistances
The solid capacitor of quasi- specified value is composed in series, two electricity of connecting on the P signal line of corresponding two two core physical layer interfaces 103,104
Hold CP, connect on the n-signal line of corresponding two two core physical layer interfaces 103,104 two capacitances CN, the capacitance CP and capacitance
CN is solid capacitor (such as ceramics, mica or thin-film capacitor)；The load voltage value of the capacitance CP and capacitance CN is at least full
Foot makes to be resistant to power-frequency voltage as defined in intrinsicallysafecircuit standard between P-P ' and between N-N '.If necessary to further increase
More solid capacitor series connection also can be used in the security reliability of the attribute failure of strong intrinsic safety isolation.
The communication function management configuration unit 106 is used to hand over the two cores physical layer interface 103,104 and Ethernet
It changes function and is managed configuration.
Specifically, the communication function management configuration unit 106 is microcontroller or embedded type CPU, is expanded for realizing application
Open up function.
When the communication function management configuration unit 106 is microcontroller, the chips of Ethernet exchange 101 is at least also
There are one MII interfaces, RMII interfaces or the SMI interface for being connect with the microcontroller, the microcontrollers to pass through the MII for tool
Interface, RMII interfaces or SMI interfaces realize the communication connection with the chips of Ethernet exchange 101, and then realize and two
The communication connection of the two cores physical layer interface 103,104；Alternatively, the microcontroller is direct by SPI interface or SMI interfaces
Interconnection is communicated with the chips of Ethernet exchange 101 and two realizations of two cores physical layer interface 103,104；
When the communication function management configuration unit 106 is embedded type CPU, the embedded type CPU be integrated in it is described with
Too in the internal processor of network switch chip 101 (for example the ARM Cortex-M7 or BCM89501 inside 88Q5050 are embedded
ARM Cortex R4).
The signal that two two core physical layer interfaces 103,104 of the chips of Ethernet exchange 101 are sent out passes through described
It is connected to external cable after essential safe type isolation coupling unit 105,106 or cable connector (is used as two core ether
Net series connection mouth 109,108).Due to all based on PAM3 codings and two core physical layer interfaces 103,104 of digital echo filtering
Must be realized with master-slave mode when two interface inter-links of internal principle mandates could communicate after internal signal clock synchronizes, therefore
Multiple similar ethernet communication control devices 100 are connected in application, two two core physical layer interfaces 103,104 are configured to
One master one from pattern work, realize the clock from the two core physical layer interfaces of time clock tracking master of two core physical layer interfaces.
The ethernet communication control device 100 is powered using intrinsically safe power supply, and all exposed ports belong to
Inbeing safe explosion prevention.
In embodiment two, it is based on the basis of embodiment one, as shown in figure 3, the ethernet communication control device
The chips of Ethernet exchange 101 of eight interfaces is used in 100.
Compared to embodiment one, five interfaces of the chips of Ethernet exchange more than 101 are answered for connecting working face scene
The network equipment.Five interfaces can integrate or external mode is realized with the chips of Ethernet exchange 101 and led to
Letter.
Specifically, in the present embodiment two, four interfaces are two cores, 100,000,000 physical layer interface 110 that four tunnels integrate, and are used for
The various network equipments 112 (such as video camera) applied towards working face are accessed, are standard 100 m ethernet there are one interface
Interface 111 (four cores) is used as working face WIFI access AP (full name Access Point, wireless access node).
In embodiment three, it is based on the basis of embodiment one, as shown in figure 4, the ethernet communication control device
An automobile-used chips of Ethernet exchange of multiport for being integrated with four tunnels, two core, 100,000,000 BroadR-Reach interfaces is used in 100
101, (such as chip of model BCM8950x), and by MII interfaces, (or RMII connects the chips of Ethernet exchange 101
Mouthful) communicated to connect with the electro-hydraulic control microcontroller 1061 of a holder.
Two interfaces in two cores, the 100000000 BroadR-Reach interfaces that the chips of Ethernet exchange 101 is internally integrated
103,104 be configured as a master one from operating mode, the hydraulic support of left adjacent frame and right adjacent frame same type can be separately connected
Controller, for realizing the complete application of exchanging and connect between hydraulic bracket controller product.
The electro-hydraulic control microcontroller 1061 of holder is configured for providing chips of Ethernet exchange 101 and the communication of two cores
And management function, while can also undertake the basic input and output journey of hydraulic support electro-hydraulic controller as shown in dotted outline in FIG.
Sequence controls the function with field-bus interface control.
Due to two cores, 100,000,000 BroadR-Reach interfaces and 100Base-T1 interfaces be mainly directed towards automobile application with
Too net physical layer, the two can directly exchange interconnection, therefore this example can also cover the similar holder control based on 100BASE-T1
Device technical solution processed.It is also possible to which two core physical layer interfaces 103,104 in the technical solution are changed into independence or integrated-type
1000Mbps interfaces (such as 88Q2110 or 88Q2112) based on 1000BASE-T1 realize the hydraulic pressure branch of two core gigabits connection
Frame controller design.In addition, a large amount of existing common Ethernet switch chips with xMII interfaces on the market also can be used
101, with external BroadR-Reach interface chips or 100BASE-T1 interface chips, such as BCM89810, DP83TC811,
TJA1100 or TJA1102 realizes same embodiment.
Secondly, the invention also provides a kind of fully-mechanized mining working communication networks.
In one embodiment, as shown in figure 5, the fully-mechanized mining working communication network 200 by least two as appointed in aforementioned
Ethernet communication control device 100 described in one is connected in series, two core network exchange communication node 201 shown in Fig. 5, just
It is the conceptual abstraction noun of aforementioned middle ethernet communication control device 100, can is any ether Netcom in Fig. 1, Fig. 3, Fig. 4
Believe control device 100.
Between the adjacent two cores network exchange communication node 201 using BroadR-Reach, 100BASE-T1 or
The two core physical layer interfaces of 1000BASE-T1 are connected, and a two core objects in two two core physical layer interfaces being together in series
Two core physical layer interfaces based on reason layer interface, another is from two core physical layer interfaces, and two core networks of entire cascaded structure can
To extend through another end of working face, each node 201 (i.e. ethernet communication control device 100) from working face a end
It is powered using the intrinsically safe power supply 202 of one or more isolation.200 system of fully-mechanized mining working communication network finally constituted
The automobile-used physical layer interface converter 203 of two cores can be used to interconnect with common Ethernet interface equipment 204.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (8)
1. a kind of ethernet communication control device, which is characterized in that including：
One chips of Ethernet exchange, the chips of Ethernet exchange have at least two support BroadR-Reach or
Two core physical layer interface of 100BASE-T1 or 1000BASE-T1；
Two respectively with two two core physical layer interfaces of the chips of Ethernet exchange communication connection essential safe types every
From coupling unit；And
One communication function management configuration unit communicated to connect with the chips of Ethernet exchange, the communication function management
Dispensing unit to the two cores physical layer interface and Ethernet exchanging function for being managed configuration；
The signal that two two core physical layer interfaces of the chips of Ethernet exchange are sent out is isolated by the essential safe type
Be connected to external cable or cable connector after coupling unit, and described two two cores physical layer interfaces with a master one from
Pattern works, wherein the clock of the two core physical layer interface of time clock tracking master from two core physical layer interfaces.
2. ethernet communication control device according to claim 1, which is characterized in that the two cores physical layer interface is base
In the two core physical layer interface chips of BroadR-Reach or 100BASE-T1 or 1000BASE-T1, the two cores physical layer connects
Mouth chip is connect by the interface of MII types with the chips of Ethernet exchange；Alternatively, the two cores physical layer interface is base
In the two core physical layer interface of integrated-type of BroadR-Reach or 100BASE-T1 or 1000BASE-T1, two core of the integrated-type
Physical layer interface is embedded in the inside of the chips of Ethernet exchange.
3. ethernet communication control device according to claim 1, which is characterized in that the communication function management configuration list
Member is microcontroller or embedded type CPU；
When the communication function management configuration unit is microcontroller, at least also there are one use for tool for the chips of Ethernet exchange
In the MII interfaces, RMII interfaces or SMI interfaces that are connect with the microcontroller, the microcontroller passes through the MII interfaces, RMII
Interface or SMI interfaces realize the communication connection with the chips of Ethernet exchange, and then realize and two two cores physics
The communication connection of layer interface；Alternatively, the microcontroller by SPI interface or SMI interfaces directly with the Ethernet switch
Chip and two two cores physical layer interfaces realize communication interconnection；
When the communication function management configuration unit is embedded type CPU, the embedded type CPU is integrated in the Ethernet exchanging
In the internal processor of movement piece.
4. ethernet communication control device according to claim 1, which is characterized in that the essential safe type isolation coupling
Unit is high frequency transformer, and industrial frequency withstand voltage is more than intrinsic safety standard specified value between the primary and secondary side of the high frequency transformer；Alternatively,
The essential safe type isolation coupling unit is two and is connected on respectively on two coring circuits of the two cores physical layer interface
Capacitor apart and signal coupler, the Capacitor apart and signal coupler are more than intrinsic safety standards by least two pressure resistances and provide
The solid capacitor of value is composed in series.
5. ethernet communication control device according to any one of claims 1-4, which is characterized in that the Ethernet exchanging
Also there is movement piece at least one interface, the interface to be applied for expanding communication and monitoring.
6. ethernet communication control device according to any one of claims 1-4, which is characterized in that described device is using this
Matter safety type power is powered.
7. a kind of fully-mechanized mining working communication network, which is characterized in that the fully-mechanized mining working communication network is by least two as weighed
Profit requires the ethernet communication control device described in any one of 1-6 to be connected in series, adjacent two ethernet communication controls
It is realized and is connected by the two cores physical layer interface between device processed, and one in two two core physical layer interfaces being together in series
Two core physical layer interfaces based on a two cores physical layer interface, another is from two core physical layer interfaces.
8. fully-mechanized mining working communication network according to claim 7, which is characterized in that the ether Netcom being together in series
Believe that control device is powered using intrinsically safe power supply all the way, or is supplied using the mutually isolated intrinsically safe power supply of multichannel
Electricity.
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| CN201810570505.XA CN108418904B (en) | 2018-06-05 | 2018-06-05 | Ethernet communication control device and fully-mechanized mining face communication network |
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| CN201810570505.XA CN108418904B (en) | 2018-06-05 | 2018-06-05 | Ethernet communication control device and fully-mechanized mining face communication network |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162745A (en) * | 2018-11-05 | 2019-01-08 | 郑州煤机液压电控有限公司 | The means of communication of hydraulic support electrohydraulic control system |
| CN109327369A (en) * | 2018-11-05 | 2019-02-12 | 郑州煤机液压电控有限公司 | Mine hydraulic bracket communication network extender and its application method |
| CN109343412A (en) * | 2018-11-05 | 2019-02-15 | 郑州煤机液压电控有限公司 | Hydraulic support electronic control system signal coupler |
| CN110944479A (en) * | 2018-09-25 | 2020-03-31 | 武汉恩达通科技有限公司 | High-speed network device with multistage electric isolation |
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