CN209118489U - Teledata collection copies fiber optic communications devices, collector and single line communication network system - Google Patents
Teledata collection copies fiber optic communications devices, collector and single line communication network system Download PDFInfo
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- CN209118489U CN209118489U CN201822249965.0U CN201822249965U CN209118489U CN 209118489 U CN209118489 U CN 209118489U CN 201822249965 U CN201822249965 U CN 201822249965U CN 209118489 U CN209118489 U CN 209118489U
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 42
- 238000012545 processing Methods 0.000 claims abstract description 22
- 230000006855 networking Effects 0.000 claims description 73
- 238000013480 data collection Methods 0.000 claims description 33
- 239000013308 plastic optical fiber Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000008399 tap water Substances 0.000 claims description 4
- 235000020679 tap water Nutrition 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 102100036407 Thioredoxin Human genes 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
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- 101001045846 Homo sapiens Histone-lysine N-methyltransferase 2A Proteins 0.000 description 1
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- 230000008054 signal transmission Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses a kind of teledata collection to copy fiber optic communications devices, collector and single line communication network system；Its device includes uni-core bidirectional photoelectric converter, central processing unit and power adapter；Uni-core bidirectional photoelectric converter forms signal with extraneous single line communication network system by optical fiber and connect；Power adapter is respectively that uni-core bidirectional light emitting converter and central processing unit provide operating voltage.The device is arranged using optical fiber uni-core bidirectional, eliminates a photoconverter, reduces manufacturing cost.
Description
Technical field
Copy network communication field the utility model relates to teledata collection more particularly to a kind of teledata collection to copy optical fiber logical
T unit and single line communication network system.
Background technique
Currently, be related to teledata centralized meter-reading system mainly includes the number such as ammeter, gas meter, flow meter, calorimeter and tap water meter
According to acquisition terminal.These data collection stations substantially set up communications network system as the communications cable using optical fiber.Optical fiber cable
Cable has the characteristics that transmission data reliability is high, stability is good, anti-electromagnetism and anti-seismic performance are strong；It therefore is widely adopted.
However, the mode that existing fiber cable sets up communication network is mainly monocycle two-way type, as shown in Figure 1, concentrator,
Several data collection stations that single closed loop two-way signaling transmits and each collector is corresponding are formed between multiple collectors
It is also to form single closed loop two-way signaling transmission；Correspondingly, as shown in Fig. 2, the teledata collection being arranged on data collection station
Fiber optic communications devices are copied, internal components, e.g., the networking between single-chip microcontroller and uni-core bidirectional photoelectric converter are also using monocycle
(i.e. signal of communication can transmit clockwise, can also transmit counterclockwise) is arranged in two-way type, and in uni-core bidirectional photoelectric converter
Including two light emitting converters and two light-receiving converters, to realize that monocycle two-way signaling transmits；Correspondingly, as schemed
Shown in 3, collector is used using four uni-core bidirectional photoelectric converters (1,2,3 and 4).This monocycle two-way type networking mode,
Link breaks down wherein, if data collection station ammeter 21 breaks down, then data collection station ammeter 22 to 2n
Opposite direction uploads data to collector two；In addition, matching used teledata collection, which is copied, needs two light in fiber optic communications devices
Electric transducer, and single-chip microcontroller is needed to control transmission direction and transmission data format, entire communication module is complicated, increases system
It causes this and increases the specification of the device, virtually also just increase the specification of data collection station, in turn
Increase manufacturing cost.
Utility model content
Based on the above issues, problem to be solved in the utility model be to provide one kind can make communication data acquisition,
It uploads and realizes independent transmission, and relatively low teledata collection copies fiber optic communications devices and single line communication network to cost of manufacture again
System.
The technical solution of the utility model is as follows:
A kind of teledata collection copies fiber optic communications devices, is arranged in data collection station；Wherein, which copies
Fiber optic communications devices include uni-core bidirectional photoelectric converter, central processing unit and power adapter；The uni-core bidirectional photoelectricity
Converter forms signal with extraneous single line communication network system by optical fiber and connect；The power adapter is respectively uni-core bidirectional
Photoelectric converter and central processing unit provide operating voltage；The central processing unit is used to control the direction of data flow.
The teledata collection copies fiber optic communications devices, wherein the quantity of the uni-core bidirectional photoelectric converter is respectively
One.
The teledata collection copies fiber optic communications devices, wherein the teledata collection copies fiber optic communications devices by leading to
Letter module interface is plugged in the data collection station.
The teledata collection copies fiber optic communications devices, wherein the power adapter converts direct current 12V voltage to directly
Flow the operating voltage of 5V.
The teledata collection copies fiber optic communications devices, wherein the data collection station includes ammeter, gas meter, flow meter, heat
Scale or tap water meter.
The utility model also provides the collector that a kind of teledata collection copies single line communication, which includes one micro-
Processor and two uni-core bidirectional converters, two uni-core bidirectional converters form signal with central processing unit respectively and connect
It connects.
The utility model also provides a kind of teledata collection and copies single line communication network system, including host terminal, concentrator,
Multiple collectors and multiple data collection stations；The single line communication network system carries out networking using optical fiber, and the single line is logical
Communication network system further includes group network bus and multiple networking sub-lines；Described group of network bus is an optical fiber；Each networking
Sub-line is also an optical fiber；Each networking sub-line is formed using optical fiber by a collector and the networking bus
Signal connection, multiple data collection stations pass through optical fiber respectively and connect in each described networking sub-line；Each number
Fiber optic communications devices are copied according to an above-mentioned teledata collection is provided in acquisition terminal；The collector is to believe with uni-core bidirectional
The collector of number transmission system；Wherein:
The output end of the concentrator is connect by dedicated or public network with the host terminal signal；The concentrator
Input terminal connect by optical fiber with networking bus formation signal；
The transmitting foot of each collector forms signal with the networking bus by an optical fiber and connect；The acquisition
The receiving end of device forms signal with networking sub-line by an optical fiber and connect；And
It is independent by an optical fiber that the teledata collection of each data collection station copies fiber optic communications devices
Signal is formed with networking sub-line to connect.
The teledata collection copies single line communication network system, wherein multiple collectors use parallel
Signal is formed with the networking bus to connect.
The teledata collection copies single line communication network system, wherein multiple ammeters using parallel with
The networking sub-line forms signal connection.
Teledata collection provided by the utility model copies fiber optic communications devices, is arranged using optical fiber uni-core bidirectional, is eliminated
One photoconverter, reduces photoelectric conversion chip dosage, reduces manufacturing cost；Correspondingly, it is logical to copy single line for teledata collection
In communication network system, fiber optic cable carries out parallel networking, multiple collectors, the acquisition of multiple data using transmitting and reception mode
Data transmitting and reception are also using the corresponding group network bus of parallel access or to organize net respectively in the devices such as terminal
Line by corresponding networking cable independent transmission and receives data between each device, any one device breaks down,
The transmitting and reception of other device communication datas are not interfered with, so that it is guaranteed that whole network system data receives and emits suitable
Freely.
Detailed description of the invention
Fig. 1 is that existing teledata collection copies single line communication network architecture schematic diagram；
Fig. 2 copies the teledata collection in single line communication network system for existing teledata collection and copies fiber optic communications devices structure
Block diagram；
Fig. 3 is existing collector internal structure block diagram networking connection schematic diagram
Fig. 4 is that teledata collection provided by the utility model copies single line communication network architecture schematic diagram；
Fig. 5 copies the teledata collection in single line communication network system for teledata collection provided by the utility model and copies optical fiber
Communication apparatus structure block diagram；
Fig. 6 is intelligent electric meter configuration structural schematic diagram；
Fig. 7 is the fiber optic telecommunications module spliced eye structural schematic diagram in intelligent electric meter；
Fig. 8 is collector internal structure block diagram networking connection schematic diagram provided by the utility model.
Specific embodiment
With reference to the accompanying drawing, the preferred embodiment of the utility model is described in further detail.
As shown in figure 4, a kind of teledata collection provided by the utility model copies single line communication network system, including host end
End, concentrator, multiple collectors and multiple data collection stations.The single line communication network system carries out networking using optical fiber；
Host terminal, concentrator, collector and data collection station are connected using fiber optic cable, set up single line communication net
Network system.Optical fiber can be plastic optical fiber, silica fibre or composite fiber.In the present embodiment, preferred plastic optical fiber.Data acquisition
Terminal can be ammeter, gas meter, flow meter, calorimeter or tap water meter etc..In the present embodiment, data collection station is ammeter.
In the single line communication network system, a group network bus, at least two networking sub-line, and group are generally comprised
It is in mind map shape structure setting between network bus and multiple networking sub-lines, group network bus is in the upper of single line communication network system
End, multiple networking sub-line block forms are set to the lower end of single line communication network system, and each networking sub-line is passed through using optical fiber
One collector forms signal with networking bus and connect, and is connected in parallel to multiple data collection stations in each networking sub-line.
In the present embodiment, it is two TRXDB2 of one TRXDB1 of networking sub-line and networking sub-line respectively that the group number of networking sub-line, which is two,.
Group network bus in the single line communication network system is a fiber buss TRXDB, can be used for emitting communication number
According to TX and receive communication data RX.
Each of single line communication network system net line is also to communicate number using an optical fiber, and for receiving
According to RX and transmitting communication data TX.For example, one TRXDB1 of networking sub-line uses simple optical fiber networking, for emitting communication data TX
Or communication data RX is received, it receives communication data and transmitting communication data does not carry out simultaneously.
Above-mentioned host terminal, that is, the service terminal of entire single line communication network system, the master control single line communication network
The related data management of all data collection stations in system, e.g., data statistics, data collection, data storage, data analysis
Deng.
Above-mentioned concentrator mainly uploads data to data collection stations all in entire single line communication network system and carries out
It concentrates after receiving arrangement, host terminal is uploaded to by dedicated or public network, or the control instruction of host terminal is passed through into group
Network bus is issued to collector.
The main of collector is there are three function: acquisition data, preservations, by the order upload data of concentrator or to number
It is passed down according to acquisition terminal and executes order.
Concentrator includes output terminals A and input terminal B；The output terminals A of concentrator is whole by dedicated or public network and host
End carries out signal connection, and the input terminal B of concentrator carries out signal connection by an optical fiber TRX and group network bus TRXDB.It concentrates
Device is sent to host terminal, or the control instruction of host terminal is issued to for collecting the information data that collector reports
Collector.
The main of collector is there are three function: acquisition data, preservations, by the order upload data of concentrator or to number
Execution order or control instruction are issued according to acquisition terminal.
In the present embodiment, the quantity of concentrator is one, in other embodiments, is also possible to two or more, is arranged several
A concentrator, needs depending on data acquisition range.For example, by taking first cell electric quantity acquisition as an example.Assuming that first cell only has one
Building, then a concentrator can be set in the electric quantity acquisition of entire building；If first cell has five buildings, the electricity in every building is adopted
Collection can be independently arranged a concentrator, and so, just there are five concentrators.Certainly, the electric quantity acquisition in five buildings can also
With with a concentrator.
In above-mentioned single line communication network system, as shown in figure 8, the collector that the teledata collection copies single line communication is
The collector of uni-core bidirectional signal transmission system.The collector include a microprocessor and two uni-core bidirectional converters (1,
2), two uni-core bidirectional converters (1,2) form signal with central processing unit respectively and connect；Central processing unit is for controlling data
The transmission direction of signal.
Wherein, uni-core bidirectional converter 1 forms the receiving end D of collector, and uni-core bidirectional converter 2 forms the hair of collector
Penetrate foot C.Receiving end D is by networking sub-line and data collection station, as ammeter issues control instruction or receives communication data；Data
The emitted foot C of acquisition terminal by group a network bus, concentrator to from host terminal to data terminal send transmitting communication data or
Receive communication data.
The working principle of collector is as follows:
1, host terminal issues data acquisition instructions to collector by concentrator, group network bus, by the transmitting of collector
It holds the second transmitting/reception foot TRXD4 of the corresponding uni-core bidirectional converter 2 of C in a manner of receiving communication data, receives this control
Signal instruction processed, and after microprocessor is converted, by the first hair of the corresponding uni-core bidirectional converter 1 of transmitting foot D of collector
It penetrates/receives foot TRXD3 and emit networking sub-line in a manner of communication data to emit, then to data collection station, such as ammeter；
2, after ammeter receives the data acquisition instructions of host terminal, related communication data information is sent out to organizing net
Line is logical to receive in the first transmitting/reception foot TRXD3 of the corresponding uni-core bidirectional converter 1 of receiving end D via collector
Letter data mode receives this communication data information, and after microprocessor is converted, then by the corresponding list of transmitting terminal C of collector
Second transmitting of core bidirectional transducer 2/reception foot TRXD4, is sent out in a manner of emitting communication data, and through a group network bus, collection
Middle device is delivered to host terminal, completes the data acquisition of each ammeter electricity.
Emit foot central processing unit and emits foot
In the present embodiment, the quantity of collector is two, and e.g., collector one and collector two, the two can be same type
Number, the collector of same specification, the collector of different size also can be used.Collector one and collector two are connected respectively
Networking sub-line one and networking sub-line two.In other embodiments, the quantity of collector can be two or more, be also possible to one
It is a.The networking mode of collector is exemplified below:
The second transmitting of the transmitting terminal C of collector one/reception foot TRXD4 passes through an optical fiber and group network bus TRXDB shape
It is connected at signal；The first transmitting of the receiving end D of collector one/reception foot TRXD3 passes through an optical fiber and networking sub-line one
TRXDB1 forms signal connection.
Correspondingly, the second transmitting of the transmitting terminal C of collector two/reception foot TRXD4 passes through an optical fiber and group network bus
TRXDB forms signal connection；The first transmitting of the receiving end D of collector two/reception foot TRXD3 passes through an optical fiber and group net
Two TRXDB2 of line forms signal connection.
As shown in figure 4, the transmitting of above-mentioned data collection station/reception foot TRXD is formed by an optical fiber with networking sub-line
Signal connection namely multiple data collection stations are accessed in networking sub-line by parallel.Such as, ammeter 11 passes through one
Optical fiber forms signal with TRXDB1 in networking sub-line one and connect.Other ammeters also carry out networking similar to ammeter 11.
In general, in same cell same storied building same layer data collection station, be added by parallel
Networking sub-line and share the same collector.In Fig. 3, ammeter 11, ammeter 12, ammeter 13 ..., ammeter 1n passes through respectively respectively
A self-corresponding optical fiber is connected in parallel in networking sub-line one, then passes through an optical fiber TRX1 again for networking sub-line one
TRXDB1 is accessed in collector one.Networking sub-line two, collector two and ammeter (21,22,23 ..., 2n) networking connection with
Networking mode where networking sub-line one is identical, and collector one and collector two are total using parallel access networking
Line.
Above-mentioned teledata collection copies single line communication network system, using simple optical fiber bus network mode networking, networking
All data collection stations, such as ammeter are connected together with plastic optical fiber, the reception of collector is then connected to by networking sub-line
On the first transmitting/reception foot TRXD3 for holding D.
Simple optical fiber bus networking needs the chip with uni-core bidirectional, teledata collection is needed to configure in ammeter and copies light
Fiber communication device.
As shown in figure 5, teledata collection copies fiber optic communications devices, it is arranged in data collection station, the communication device packet
Include uni-core bidirectional photoelectric converter, central processing unit and power adapter, and light emitting converter, light-receiving converter and
Power adapter is arranged on the circuit main board of data collection station.Uni-core bidirectional photoelectric converter and by optical fiber with it is above-mentioned
Single line communication network system forms signal connection；Power adapter is respectively that light emitting converter and light-receiving converter provide work
Make voltage.Since the operating voltage of uni-core bidirectional photoelectric converter and central processing unit is 5V；So power adapter will be in VCC
Direct current 12V voltage be converted to direct current 5V operating voltage；VSS ground connection.Central processing unit is used to control the direction of data flow.
Teledata collection copies fiber optic communications devices realization principle are as follows:
Host terminal in simple optical fiber bus network issues data acquisition instructions, by the hair of single bi-directional light electric transducer
It penetrates/receives foot TRXD and received in a manner of communication data by receiving, and carried out after communication data exchanges with central processing unit, then via connecing
It receives foot RXD and is sent to circuit main board, carry out data acquisition；Conversely, circuit main board uploads the data of acquisition via transmitting foot TXD
To central processing unit, and communication data is carried out with uni-core bidirectional photoelectric converter and is exchanged, while controlling communication data transfer direction
Are as follows: central processing unit is transmitted to uni-core bidirectional photoelectric converter, then by uni-core bidirectional photoelectric converter it is emitted/receive foot
TRXD is transmitted in simple optical fiber bus network in a manner of emitting communication data, such as passes through networking sub-line, collector, networking
Host terminal is uploaded to after bus, concentrator.
All uni-core bidirectional photoelectric converters are initially set to reception state, the order for waiting collector to send, to be collected
After device transmission order comes, central processing unit judgement is the uni-core bidirectional photoelectricity that will draw oneself up turn after the order to oneself module
Parallel operation state is emission state, and the data that collector is needed upload；Uni-core bidirectional photoelectric converter enters reception state later.
Wherein, the quantity of uni-core bidirectional photoelectric converter is one.In view of in same optical fiber, the transmitting of signal of communication and connect
Receipts are unidirectional, time-division operations, emit signal of communication to upper level or receive the communication information from upper level and are staggered operation, i.e., not same
Operation in one time；Then teledata collection, which copies fiber optic communications devices, can be realized signal of communication one-way transmission.When teledata collection
When copying fiber optic communications devices and being placed in above-mentioned teledata collection and copy in single line communication network system, then the single line communication network system is
As one-way bus networking.
It will be sent to teledata collection by optical fiber from the transmitting communication data of circuit main board and copy fiber optic communications devices
Light emitting converter, after processing, then emission component, the collector of the networking sub-line by fibre optical transmission into bus network
Deng copying single single line communication network system into teledata collection；Correspondingly, teledata collection copies single single line communication network
Order in system, such as the reception sub-line of main control terminal ordered through collector, networking sub-line in bus network, enter
Teledata collection copies the light-receiving converter of fiber optic communications devices, after converted, then by optical fiber output reception communication data to electricity
Road mainboard.Simple optical fiber bus networking, working principle are uni-core bidirectional annulars, i.e., are enjoyed, established with a fiber buss timesharing
The unidirectional connection relationship of two o'clock.Such as:
Moment 1: collector one sends transmitting communication data, after acquired device one receives；The communication number is received by ammeter 11
According between other moment points, ammeter 11, without contacting, does not send the transmitting communication data with the transmitting communication data, comes to being transmitted through
Transmitting communication data also do not deal with；
Moment 2: ammeter 11 sends transmitting communication data, and collector one receives；Between other moment points, ammeter 11 and the hair
Communication data is penetrated without connection, does not send data, is not also handled the communication data come is transmitted through.
Photoelectric chip dosage is as double joint bus, but ammeter communication module central processing unit, advantage have saved one
Fiber buss.
In the present embodiment, above-mentioned teledata collection copies fiber optic communications devices, is set in ammeter.As shown in fig. 6, ammeter
100 include RS584 communication interface 130, display screen 110, communication module interface mother mouth 120 and electrical wire interface 140.Such as Fig. 7 institute
Show, is copied in teledata collection and be equipped with communication module interface public affairs mouth on fiber optic communications devices, set on the communication module interface public affairs mouth
There are the first signal of communication conductive contact TRXD1, the second signal of communication conductive contact TRXD2 and power supply conductive contact (e.g., VCC
And VSS).
Teledata collection copies fiber optic communications devices and passes through signal of communication on communication module interface public affairs mouth and the touching of power supply conduction
Point be adapted to after grafting and be accessed on the circuit main board in ammeter 100 with the communication module interface mother mouth 120 on ammeter 100.
Display screen 110 in ammeter 100 for observing reading, the time etc. of ammeter in real time；The electrical wire interface of ammeter 100
140 be four, and two of them electrical wire interface is electrically connected with outdoor firewire and zero curve respectively, another two electrical wire interface respectively with room
Interior firewire and zero curve electrical connection.
Teledata collection copy fiber optic communications devices can also the whole design together with circuit main board, be fixed on circuit main board
On.
Power information acquisition information transmission mode strengths and weaknesses compares；Such as, power line carrier (PLC), 485 bus of RS, short distance
Wireless communication and polymer optical fiber communication.Comparison result such as following table.
As can be known from the above table, single line communication network system is copied due to the teledata collection of the utility model to make using plastic optical fiber
Networking is carried out for cable, networking advantage is also to become apparent from compared with other, is more advantageous.
It should be understood that the above-mentioned statement for the utility model preferred embodiment is more detailed, can not therefore and
It is considered the limitation to the utility model patent protection scope, the scope of patent protection of the utility model should be with appended claims
Subject to.
Claims (10)
1. a kind of teledata collection copies fiber optic communications devices, it is arranged in data collection station, which is characterized in that the teledata
It includes uni-core bidirectional photoelectric converter, central processing unit and power adapter that collection, which copies fiber optic communications devices,；The uni-core bidirectional
Photoelectric converter forms signal with extraneous single line communication network system by optical fiber and connect；The power adapter is respectively single
Two-way photoelectric converter and central processing unit provide operating voltage；The central processing unit is used to control the direction of data flow.
2. teledata collection according to claim 1 copies fiber optic communications devices, which is characterized in that the uni-core bidirectional photoelectricity
The quantity of converter is respectively one.
3. teledata collection according to claim 1 copies fiber optic communications devices, which is characterized in that the teledata collection is copied
Fiber optic communications devices are plugged in the data collection station by communication module interface.
4. teledata collection according to claim 1 copies fiber optic communications devices, which is characterized in that the power adapter will
Direct current 12V voltage is converted into the operating voltage of direct current 5V.
5. teledata collection according to claim 1 copies fiber optic communications devices, which is characterized in that the data collection station
Including ammeter, gas meter, flow meter, calorimeter or tap water meter.
6. the collector that a kind of teledata collection copies single line communication, which is characterized in that the collector includes a microprocessor
And two uni-core bidirectional converters, two uni-core bidirectional converters form signal with central processing unit respectively and connect.
7. a kind of teledata collection copies single line communication network system, including host terminal, concentrator, multiple collectors and multiple
Data collection station；It is characterized in that, the single line communication network system carries out networking, the single line communication network system using optical fiber
System further includes group network bus and multiple networking sub-lines；Described group of network bus is an optical fiber；Each networking sub-line is also
A piece optical fiber；Each networking sub-line forms signal by a collector and the networking bus using optical fiber and connects
It connects, multiple data collection stations is connected with by optical fiber in each described networking sub-line；Each data acquisition is eventually
It is provided with a teledata collection as described in Claims 1-4 is any in end and copies fiber optic communications devices；The collector is tool
There is the collector of uni-core bidirectional standard；Wherein:
The output end of the concentrator is connect by dedicated or public network with the host terminal signal；The concentrator it is defeated
Enter end and is connect by an optical fiber with networking bus formation signal；
The transmitting foot of each collector forms signal with the networking bus by an optical fiber and connect；The collector
Receiving end forms signal with the networking sub-line by an optical fiber and connect；And
It is independent by an optical fiber and institute that the teledata collection of each data collection station copies fiber optic communications devices
It states networking sub-line and forms signal connection.
8. teledata collection according to claim 7 copies single line communication network system, which is characterized in that multiple acquisitions
Device forms signal with the networking bus using parallel and connect.
9. teledata collection according to claim 7 copies single line communication network system, which is characterized in that multiple data
Acquisition terminal forms signal with the networking sub-line using parallel and connect.
10. teledata collection according to claim 7 copies single line communication network system, which is characterized in that the single line is logical
Communication network system carries out networking using plastic optical fiber, silica fibre or composite fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822249965.0U CN209118489U (en) | 2018-12-29 | 2018-12-29 | Teledata collection copies fiber optic communications devices, collector and single line communication network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822249965.0U CN209118489U (en) | 2018-12-29 | 2018-12-29 | Teledata collection copies fiber optic communications devices, collector and single line communication network system |
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| Publication Number | Publication Date |
|---|---|
| CN209118489U true CN209118489U (en) | 2019-07-16 |
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| CN201822249965.0U Active CN209118489U (en) | 2018-12-29 | 2018-12-29 | Teledata collection copies fiber optic communications devices, collector and single line communication network system |
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