CN107465450A - The switching of transmission services and protection device and control method during a kind of fiber failure - Google Patents
The switching of transmission services and protection device and control method during a kind of fiber failure Download PDFInfo
- Publication number
- CN107465450A CN107465450A CN201710859745.7A CN201710859745A CN107465450A CN 107465450 A CN107465450 A CN 107465450A CN 201710859745 A CN201710859745 A CN 201710859745A CN 107465450 A CN107465450 A CN 107465450A
- Authority
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- China
- Prior art keywords
- slave station
- transmission line
- main website
- shunt
- optical fiber
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 135
- 239000000835 fiber Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000013307 optical fiber Substances 0.000 claims abstract description 81
- 230000003287 optical effect Effects 0.000 claims abstract description 46
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000000253 optical time-domain reflectometry Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 abstract description 8
- 238000012546 transfer Methods 0.000 abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 208000032369 Primary transmission Diseases 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013501 data transformation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0287—Protection in WDM systems
Abstract
The present invention relates to technical field of photo communication, the switching of transmission services and protection device and control method when disclosing a kind of fiber failure.Comprising master device and slave station equipment, master/slave station equipment includes master/slave station microcontroller, master/slave station alternative photoswitch, master/slave station combiner, master/slave station shunt and master/slave station Optical Power Monitor Module.The downlink transfer of master device to slave station equipment is as follows：More terminals connection of main website alternative photoswitch it is descending it is active/standby use optical fiber transmission line, it is descending active/standby to connect the first slave station shunt and the second slave station shunt, reconnection slave station combiner respectively with optical fiber transmission line；First slave station shunt and the second slave station shunt connect the first slave station Optical Power Monitor Module and the second slave station Optical Power Monitor Module respectively；Slave station microcontroller gathers optical power monitoring signal and controls slave station alternative photoswitch to produce switching action.Uplink of the slave station equipment to master device is identical with the structure and principle of downlink transfer.
Description
Technical field
The present invention relates to the switching of transmission services during a kind of technical field of photo communication, especially fiber failure and protection device
And control method.
Background technology
Fiber optic network technology is a kind of mechanics of communication for being used as transmission signal vector using optical fiber, and it can allow different letters
Analog or digital signal is transmitted by laser beam between breath system.Because laser beam than electric wave has higher frequency, therefore
Its transmission speed is much larger than the communication system of traditional wired and wireless type.Counted according to Ministry of Industry and Information, between 2010 ~ 2015 years, light
The speedup of cable total line length is more than 20%.Corresponding is that the maintenance task of fiber cable network will be more heavy.
It is to do transmitted in both directions using an optical fiber in the fiber optic network that traditional single fiber bi-directional transmits, when optical fiber breaks
Or other factorses to cause data-transformation facility to interrupt when luminous power is too low.A solution of this problem is passed in optical fiber
Working channels and alternate channel are configured in defeated circuit；Wherein working channels are initially set primary fibre circuit, and primary in this
When disabled status occurs for fibre circuit, beam Propagation path is switched into alternate channel.To reach this function, it is necessary to design one kind
Primary and alternate channel handover control system, when the master channel available for optical fiber transmission line fails, by its beam Propagation road
Footpath is changed to switch to its alternate channel.Therefore, the control efficiency of handover control system has extremely to the efficiency of optical fiber transmission line
Important influence.
The content of the invention
The technical problems to be solved by the invention are：For above-mentioned problem, there is provided transmitted during a kind of fiber failure
The switching of business and protection device and control method.
The technical solution adopted by the present invention is as follows：The switching of transmission services and protection device during a kind of fiber failure, comprising
Master device and slave station equipment, master device include main website microcontroller, main website alternative photoswitch, main website combiner, main website
Shunt and main website Optical Power Monitor Module；Slave station equipment includes slave station microcontroller, slave station alternative photoswitch, slave station branch
Device, slave station combiner and slave station Optical Power Monitor Module；More terminals of the main website alternative photoswitch connect descending primary light
Fine transmission line and descending spare fibre transmission line, descending primary optical fiber transmission line connects the first slave station shunt, descending
Spare fibre transmission line connects the second slave station shunt, the first slave station shunt and the second slave station shunt be all connected with from
Stand combiner；
The first slave station shunt and the second slave station shunt connect respectively the first slave station Optical Power Monitor Module and second from
Stand Optical Power Monitor Module, for monitoring descending primary optical fiber transmission line and descending spare fibre transmission line；
The first slave station Optical Power Monitor Module and the second slave station Optical Power Monitor Module are connected with slave station microcontroller, described
Slave station microcontroller is connected with slave station alternative photoswitch；
More terminals of the slave station alternative photoswitch connect up primary optical fiber transmission line and up spare fibre transmission line
Road, up primary optical fiber transmission line connect the first main website shunt, and up spare fibre transmission line connects the second main website point
Road device, first main website shunt and the second main website shunt are all connected with main website combiner；
First main website shunt and the second main website shunt connect the first main website Optical Power Monitor Module and the second master respectively
Stand Optical Power Monitor Module, for monitoring up primary optical fiber transmission line and up spare fibre transmission line；
First main website Optical Power Monitor Module and the second main website Optical Power Monitor Module are connected with main website microcontroller, described
Main website microcontroller is connected with main website alternative photoswitch.
Further, the descending primary optical fiber transmission line includes the first wavelength-division multiplex electricity using the connection of primary optical fiber
Road, the first wavelength-division multiplex circuit are connected between main website alternative photoswitch and the first slave station shunt；
The descending spare fibre transmission line includes the second wavelength-division multiplex circuit using spare fibre connection, second ripple
Multiplex circuit is divided to be connected between main website alternative photoswitch and the second slave station shunt；
The up primary optical fiber transmission line includes the 3rd wavelength-division multiplex circuit using the connection of primary optical fiber, the 3rd ripple
Multiplex circuit is divided to be connected between slave station alternative photoswitch and the first main website shunt；
The up spare fibre transmission line includes the 4th wavelength-division multiplex circuit using spare fibre connection, the 4th ripple
Multiplex circuit is divided to be connected between slave station alternative photoswitch and the second main website shunt.
Further, master device also includes OTDR modules and the photoswitch of multiselect one, the main website microprocessor control
Whether OTDR modules work, the common port of the OTDR modules connection photoswitch of multiselect one, the multichannel of the photoswitch of multiselect one
End connects the first wavelength-division multiplex circuit, the second wavelength-division multiplex circuit, the 3rd wavelength-division multiplex circuit and the 4th wavelength-division multiplex electricity respectively
Road.
The invention also discloses the control method of a kind of switching of transmission services during fiber failure and protection, its feature exists
In, including procedure below：Step 1：Main website microcontroller monitors that up primary optical fiber passes by main website Optical Power Monitor Module
When defeated circuit is without light（Break down）, control main website alternative photoswitch to produce switching action immediately, by Transmission Fibers passage
Descending spare fibre transmission line is switched to from descending primary optical fiber transmission line；Slave station microcontroller is supervised by slave station luminous power
Survey module monitors to descending primary optical fiber transmission line without light when（Break down）, the production of slave station alternative photoswitch is controlled immediately
Raw switching action, up spare fibre transmission line is switched to by Transmission Fibers passage from up primary optical fiber transmission line；Step
Rapid 2：Main website microprocessor control OTDR modules produce test action, obtain the fault message of primary optical fiber transmission line；Step
3：The primary optical fiber transmission line to break down, the optical fiber transmission line of reparation are repaired while spare fibre transmission line works
Change turns to new spare fibre circuit, and the control method of repeat step 1- steps 3.
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：The present invention is in downlink transfer line
Road and upstream transmission line are provided with descending primary optical fiber transmission line, the transmission of descending spare fibre, up primary optical fiber transmission
Circuit, up spare fibre transmission line so that downlink transfer circuit and upstream transmission line are respectively provided with one under normal circumstances
The standby transport path to be worked in the case of the primary transmission path of work and a primary transmission path fault, and use light work(
Rate observation circuit carries out optical fibre fault monitoring, effectively controls the photoswitch of multiselect one to carry out primary optical fiber transmission line by microcontroller
Road and the switching of spare fibre transmission, improve optical fiber efficiency of transmission；
Moreover, optical power monitoring circuit monitors rapidly to line fault, and fault message is quickly move through microcontroller transmission
The photoswitch of multiselect one is given, realizes the switching of primary and backup transmission line so that the switching time of this switching device is mainly depended on
In photoswitch switching time, switch speed is fast, can reach below 10ms.
Brief description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
The structural representation of the switching of transmission services and protection device when Fig. 1 is fiber failure of the present invention.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
Any feature disclosed in this specification, unless specifically stated otherwise, can be equivalent by other or with similar purpose
Alternative features are replaced.I.e., unless specifically stated otherwise, each feature is an example in a series of equivalent or similar characteristics
.
As shown in figure 1, the present invention fiber failure when transmission services switching and protection device, comprising master device and from
Station equipment, master device include main website microcontroller, main website alternative photoswitch, main website combiner, main website shunt and main website
Optical Power Monitor Module；Slave station equipment includes slave station microcontroller, slave station alternative photoswitch, slave station shunt, slave station combining
Device and slave station Optical Power Monitor Module.
More terminals of wherein described main website alternative photoswitch connect descending primary optical fiber transmission line and descending standby light
Fine transmission line, descending primary optical fiber transmission line connect the first slave station shunt, descending spare fibre transmission line connection the
Two slave station shunts, the first slave station shunt and the second slave station shunt are all connected with slave station combiner；The structure is main website
Downlink transfer circuit between slave station, main website alternative photoswitch is single-ended to be connected to transmission equipment, under normal circumstances main website two
Select a photoswitch to connect descending primary optical fiber transmission line to be communicated, when monitor up primary optical fiber transmission line occur therefore
During barrier, then main website alternative photoswitch switches, and connects descending spare fibre transmission line and is communicated, the connection of slave station combiner end
Transmission equipment, realizes the communication of downlink transfer circuit.
The first slave station shunt and the second slave station shunt connect the first slave station Optical Power Monitor Module and respectively
Two slave station Optical Power Monitor Modules, for monitoring descending primary optical fiber transmission line and descending spare fibre transmission line；This reality
The Optical Power Monitor Module for applying example is connected on the shunt of corresponding optical fiber transmission line, is transmitted for optical fiber where receiving
Optical signal, and monitor optical power attenuation amount, and attenuation is transferred to microcontroller, optical fiber transmission line is whether where monitoring
Have light, i.e., whether failure.For example, the first slave station Optical Power Monitor Module monitors that descending primary optical fiber transmission line transmits
When failure is without light, and when the second slave station Optical Power Monitor Module monitors that descending spare fibre transmission line has light, then this is believed
Breath is transferred to slave station microcontroller, slave station microprocessor control slave station alternative photoswitch, connects up spare fibre transmission line
Road is operated.
The first slave station Optical Power Monitor Module and the second slave station Optical Power Monitor Module are connected with slave station microcontroller,
The slave station microcontroller is connected with slave station alternative photoswitch, and the slave station alternative photoswitch has terminal more than two, institute
The terminal more than two for stating slave station alternative photoswitch connects up primary optical fiber transmission line and the transmission of up spare fibre respectively
Circuit, up primary optical fiber transmission line or up spare fibre transmission line are connected for controlling；Up primary optical fiber passes
Defeated the first main website of connection shunt, up spare fibre transmission line connect the second main website shunt, first main website
Shunt and the second main website shunt are all connected with main website combiner.Upstream transmission line of the structure between slave station and main website,
Slave station alternative photoswitch is single-ended to be connected to transmission equipment, and slave station alternative photoswitch connects descending primary optical fiber under normal circumstances
Transmission line is communicated, when slave station microcontroller monitors that descending primary optical fiber transmission line is unglazed（During failure）, then
The switching of slave station alternative photoswitch is controlled, up spare fibre transmission line is connected and is communicated, main website combiner end is connected to
Transmission equipment, realize the communication of upstream transmission line.
First main website shunt and the second main website shunt connect the first main website Optical Power Monitor Module and respectively
Two main website Optical Power Monitor Modules, for monitoring up primary optical fiber transmission line and up spare fibre transmission line；It is described
First main website Optical Power Monitor Module and the second main website Optical Power Monitor Module are connected with main website microcontroller, the main website micro-control
Device processed is connected with main website alternative photoswitch.For example, when the first main website optical power monitoring circuit monitoring passes to up primary optical fiber
Defeated line fault, then main website microcontroller is transmitted this information to, microprocessor control main website of main website alternative photoswitch, is connected
Descending spare fibre transmission line.
In another embodiment, the descending primary optical fiber transmission line includes answering using the first wavelength-division of primary optical fiber connection
With circuit, the first wavelength-division multiplex circuit is connected between main website alternative photoswitch and the first slave station shunt；
The descending spare fibre transmission line, up primary optical fiber transmission line and up spare fibre transmission line are with
The primary optical fiber transmission line of row to specifically include structure similar；Downgoing line transmits signal of communication from main website to slave station, up
For circuit by signal of communication from slave station to master station transmission, primary optical fiber and spare fibre are also relative concept, by the life of normal use
Entitled primary optical fiber, what is used when the optical fiber of normal use is out of order is named as spare fibre, actually identical optical fiber cable
Road.
In another embodiment, master device also includes OTDR modules and the photoswitch of multiselect one, the main website microcontroller control
Whether OTDR modules processed work, the common port of the OTDR modules connection photoswitch of multiselect one, the photoswitch of multiselect one it is more
Terminal connects the first wavelength-division multiplex circuit, the second wavelength-division multiplex circuit, the 3rd wavelength-division multiplex circuit and the 4th wavelength-division multiplex respectively
Circuit；
When work carries out signal transmission, main website microcontroller starts OTDR modules, and photoswitch is connected and the primary optical fiber transmission of testing uplink
Circuit and descending primary optical fiber transmission line, generate state report.
Specifically now illustrate that the switching of transmission services and protection device are carried out fast when primary optical fiber transmission line runs into failure
The operation principle of speed switching：
Optical power monitoring circuit monitors the luminous power of primary optical fiber transmission line in real time, such as when the first main website optical power monitoring mould
Block monitors that up primary optical fiber transmission line breaks down, and fault-signal is transferred into main website microcontroller, main website microcontroller
Device controls main website either-or switch switching immediately, connects descending spare fibre transmission line；Now, descending spare fibre transmission line
Road works, and descending primary optical fiber transmission line does not work；First slave station Optical Power Monitor Module monitors that descending spare fibre passes
Defeated circuit has light, and the second slave station luminous power detection module monitors that descending primary optical fiber transmission line is unglazed；Slave station microcontroller
The photoswitch switching of slave station multiselect one is controlled, up spare fibre transmission line is connected and starts working.The switching device quickly has
Working optical fibre circuit switching to spare fibre circuit, main website or slave station interior lights power monitoring signal are transferred to by effect ground quickly
Photoswitch, the switching time of switching device depend on that the time of the photoswitch of multiselect one switching, 10ms can be reached once.Main website is micro-
Controller control OTDR modules produce test action, obtain the fault message of primary optical fiber transmission line.Spare fibre transmission line
The primary optical fiber transmission line to break down is repaired while road works, the optical fiber transmission line of reparation, which becomes, turns to new standby light
Fine circuit, and repeat above-mentioned control method.
The invention is not limited in foregoing embodiment.The present invention, which expands to, any in this manual to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (4)
1. the switching of transmission services and protection device during a kind of fiber failure, it is characterised in that set comprising master device and slave station
Standby, master device includes main website microcontroller, main website alternative photoswitch, main website combiner, main website shunt and main website light work(
Rate monitoring modular；Slave station equipment include slave station microcontroller, slave station alternative photoswitch, slave station shunt, slave station combiner and
Slave station Optical Power Monitor Module；
More terminals of the main website alternative photoswitch connect descending primary optical fiber transmission line and descending spare fibre transmission line
Road, descending primary optical fiber transmission line connect the first slave station shunt, and descending spare fibre transmission line connects the second slave station point
Road device, the first slave station shunt and the second slave station shunt are all connected with slave station combiner；
The first slave station shunt and the second slave station shunt connect respectively the first slave station Optical Power Monitor Module and second from
Stand Optical Power Monitor Module, for monitoring descending primary optical fiber transmission line and descending spare fibre transmission line；
The first slave station Optical Power Monitor Module and the second slave station Optical Power Monitor Module are connected with slave station microcontroller, described
Slave station microcontroller is connected with slave station alternative photoswitch；
More terminals of the slave station alternative photoswitch connect up primary optical fiber transmission line and up spare fibre transmission line
Road, up primary optical fiber transmission line connect the first main website shunt, and up spare fibre transmission line connects the second main website point
Road device, first main website shunt and the second main website shunt are all connected with main website combiner；
First main website shunt and the second main website shunt connect the first main website Optical Power Monitor Module and the second master respectively
Stand Optical Power Monitor Module, for monitoring up primary optical fiber transmission line and up spare fibre transmission line；
First main website Optical Power Monitor Module and the second main website Optical Power Monitor Module are connected with main website microcontroller, described
Main website microcontroller is connected with main website alternative photoswitch.
2. the switching of transmission services and protection device during fiber failure as claimed in claim 1, it is characterised in that described descending
Primary optical fiber transmission line includes the first wavelength-division multiplex circuit using the connection of primary optical fiber, and the first wavelength-division multiplex circuit connects
It is connected between main website alternative photoswitch and the first slave station shunt；
The descending spare fibre transmission line includes the second wavelength-division multiplex circuit using spare fibre connection, second ripple
Multiplex circuit is divided to be connected between main website alternative photoswitch and the second slave station shunt；
The up primary optical fiber transmission line includes the 3rd wavelength-division multiplex circuit using the connection of primary optical fiber, the 3rd ripple
Multiplex circuit is divided to be connected between slave station alternative photoswitch and the first main website shunt；
The up spare fibre transmission line includes the 4th wavelength-division multiplex circuit using spare fibre connection, the 4th ripple
Multiplex circuit is divided to be connected between slave station alternative photoswitch and the second main website shunt.
3. the switching of transmission services and protection device during fiber failure as claimed in claim 2, it is characterised in that master device
Also include OTDR modules and the photoswitch of multiselect one, whether the main website microprocessor control OTDR modules work, the OTDR moulds
Block connects the common port of the photoswitch of multiselect one, more terminals of the photoswitch of multiselect one connect respectively the first wavelength-division multiplex circuit,
Second wavelength-division multiplex circuit, the 3rd wavelength-division multiplex circuit and the 4th wavelength-division multiplex circuit.
4. the control method of switching and the protection of transmission services during a kind of fiber failure, it is characterised in that including procedure below：Step
Rapid 1：When main website microcontroller monitors up primary optical fiber transmission line without light by main website Optical Power Monitor Module, control immediately
Main website alternative photoswitch processed produces switching action, Transmission Fibers passage is switched to from descending primary optical fiber transmission line descending
Spare fibre transmission line；Slave station microcontroller monitors descending primary optical fiber transmission line by slave station Optical Power Monitor Module
During without light, control slave station alternative photoswitch to produce switching action immediately, Transmission Fibers passage is transmitted from up primary optical fiber
Circuit switching is to up spare fibre transmission line；Step 2：Main website microprocessor control OTDR modules produce test action, obtain
Take the fault message of primary optical fiber transmission line；Step 3：The master to break down is repaired while spare fibre transmission line works
With optical fiber transmission line, the optical fiber transmission line of reparation, which becomes, turns to new spare fibre circuit, and the control of repeat step 1- steps 3
Method processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710859745.7A CN107465450B (en) | 2017-09-21 | 2017-09-21 | Switching and protecting device and control method for transmission service during optical fiber fault |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710859745.7A CN107465450B (en) | 2017-09-21 | 2017-09-21 | Switching and protecting device and control method for transmission service during optical fiber fault |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107465450A true CN107465450A (en) | 2017-12-12 |
| CN107465450B CN107465450B (en) | 2020-08-04 |
Family
ID=60553051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710859745.7A Active CN107465450B (en) | 2017-09-21 | 2017-09-21 | Switching and protecting device and control method for transmission service during optical fiber fault |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107465450B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108737012A (en) * | 2018-06-27 | 2018-11-02 | 国网四川省电力公司广安供电公司 | A kind of fiber optic protection switching method and device |
| CN109150295A (en) * | 2018-07-03 | 2019-01-04 | 深圳市中科新业信息科技发展有限公司 | A kind of measuring system and measuring device |
| CN109412684A (en) * | 2018-11-07 | 2019-03-01 | 东北电力大学 | A kind of city power optical fiber communication network on-line monitoring and automatic checkout system |
| CN109980906A (en) * | 2019-04-08 | 2019-07-05 | 合肥尚锐电气有限公司 | A kind of unit cascaded high-voltage frequency converter high reliability two-way fibre system |
| CN110247700A (en) * | 2019-07-10 | 2019-09-17 | 武汉孚晟科技有限公司 | A kind of intelligent optical cable monitoring system and method with cable protection function |
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| CN204615827U (en) * | 2015-04-13 | 2015-09-02 | 国家电网公司 | A kind of Intelligent optical fiber distributor and system |
| CN206332672U (en) * | 2017-01-10 | 2017-07-14 | 成都中通嘉业科技发展有限公司 | A kind of fiber optic protection monitoring device and its application circuit |
| CN206481302U (en) * | 2016-11-22 | 2017-09-08 | 广州汇信特通信技术股份有限公司 | A kind of fibre circuit protector for preparing and carrying fine detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108737012A (en) * | 2018-06-27 | 2018-11-02 | 国网四川省电力公司广安供电公司 | A kind of fiber optic protection switching method and device |
| CN109150295A (en) * | 2018-07-03 | 2019-01-04 | 深圳市中科新业信息科技发展有限公司 | A kind of measuring system and measuring device |
| CN109412684A (en) * | 2018-11-07 | 2019-03-01 | 东北电力大学 | A kind of city power optical fiber communication network on-line monitoring and automatic checkout system |
| CN109980906A (en) * | 2019-04-08 | 2019-07-05 | 合肥尚锐电气有限公司 | A kind of unit cascaded high-voltage frequency converter high reliability two-way fibre system |
| CN109980906B (en) * | 2019-04-08 | 2021-06-22 | 合肥尚锐电气有限公司 | High-reliability double-path optical fiber system of unit cascade high-voltage frequency converter |
| CN110247700A (en) * | 2019-07-10 | 2019-09-17 | 武汉孚晟科技有限公司 | A kind of intelligent optical cable monitoring system and method with cable protection function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107465450B (en) | 2020-08-04 |
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