CN105490739B - Backbone network optical cable monitoring system and method - Google Patents
Backbone network optical cable monitoring system and method Download PDFInfo
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- CN105490739B CN105490739B CN201510829123.0A CN201510829123A CN105490739B CN 105490739 B CN105490739 B CN 105490739B CN 201510829123 A CN201510829123 A CN 201510829123A CN 105490739 B CN105490739 B CN 105490739B
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- 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
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
- H04B10/0773—Network aspects, e.g. central monitoring of transmission parameters
Abstract
The invention discloses a kind of backbone network optical cable monitoring system and method, the system includes：Light source, light pulse form unit, photodetector unit, data processing unit, prewarning unit and display unit；Light pulse forms the light that unit is used to send according to light source and produces local oscillator light and pulsed light, and pulsed light is sent to tested sensor fibre, photodetector unit is delivered to together with local oscillator light to Rayleigh scattering light after pulsed light is caused in communication process；Photodetector unit is used to carry out backward Rayleigh scattering light and local oscillator light relevant detection；Data processing unit is used to carry out data processing to the signal of photodetector unit output, exports monitoring result；Prewarning unit is used to carry out fault pre-alarming according to monitoring result；Display unit is used for show map, and abort situation is positioned with monitoring result according to the map, and map includes backbone network circuit and optical cable.Actively monitoring properties of optical fiber cable in real time of the invention, finds failure or hidden danger, carries out fault location and early warning in time.
Description
Technical field
The present invention relates to fiber optic cable monitor technical field, more particularly to a kind of backbone network optical cable monitoring system and method.
Background technology
At present, China each province and city CHINA RFTCOM Co Ltd (group) company has all built up the metropolitan area bone of respective covering core customer substantially
Dry cable network.Compared with other means of communication such as traditional telecommunication, wireless, Fibre Optical Communication Technology has impayable superior
Property, i.e., message capacity is big, repeater span is long, security performance is good, adaptable, but this Large Copacity and the optical cable of long range pass
Defeated network is at present largely to check and meet an urgent need breakdown repair by simple line inspection to carry out maintenance pipe in Broadcast and TV system
Reason, as welding breakpoint gradually increases, the performance of optical cable transmission network can gradually degrade, and whether early stage laying optical cable reaches always
Change the time limit, whether potential faults quickly increase, and whether each several part lightguide cable link in outdoor aerial or pipeline is close to need more
The criticality changed, the problem of these are profound urgently to be resolved hurrily, still further aspect, metropolitan area backbone's light that CHINA RFTCOM Co Ltd company possesses
Cable net from the Broadband integrated service network of supporting a variety of applications is expanded to based on broadcast television signal transmission services originally, this
Kind development situation also proposes higher requirement to optical cable maintenance management.
Communication of power system traffic department mainly uses traditional manual mode passive maintenance circuit, and staff uses hand
Optical time domain reflectometer (Optical Time Domain Reflectometer, referred to as OTDR) is held to survey lightguide cable link
Examination, this maintenance mode have the following disadvantages：
(1) it is a kind of Passive Test mode, can not actively, monitor the transmission matter of the fibre circuit used online in real time
Be only possible to find failure when amount, only communication disruption, and tested by manual test mode and fault distinguishing, but now by
Influence has been caused on the operation of power system in communication disruption.
(2) traditional fault distinguishing method simply judges whether the light device of Transmission system alarms, and it is light that cannot be distinguished by
The optical cable that equipment fault, various connection loose contacts are also distributed across open air is damaged, therefore be directly affects failure and sentenced
Other accuracy, science and promptness, very big difficulty is brought to maintenance work.
In view of the above-mentioned problems, not yet propose effective solution at present.
The content of the invention
, can not at least to solve existing Passive Test the invention provides a kind of backbone network optical cable monitoring system and method
In time find failure, and fault distinguishing accuracy it is not high the problem of.
According to an aspect of the invention, there is provided a kind of backbone network optical cable monitoring system, including：Light source, light pulse shape
Into unit, photodetector unit, data processing unit, prewarning unit and display unit；The light pulse forms unit, for root
The light sent according to the light source produces local oscillator light and pulsed light, wherein, the pulsed light is sent to tested sensor fibre, described
After pulsed light is caused in communication process the photodetector unit is sent to Rayleigh scattering light together with the local oscillator light；
The photodetector unit, for carrying out relevant detection with the local oscillator light to the backward Rayleigh scattering light；At the data
Unit is managed, the signal for being exported to the photodetector unit carries out data processing, exports monitoring result；The early warning list
Member, for carrying out fault pre-alarming according to the monitoring result；The display unit, for based on GIS-Geographic Information System explicitly
Figure, and abort situation is positioned according to the map and the monitoring result, wherein the map includes the line of backbone network
Road and optical cable.
In one embodiment, the light pulse forms unit and included：Microwave frequency synthesizer, the single-side belt being sequentially connected
Modulator, the first coupler, electrooptic modulator, amplifier and the second coupler, wherein, the single side-band modulator is additionally coupled to
The light source, second coupler are additionally coupled to the tested sensor fibre；The light pulse, which forms unit, also to be included：Arteries and veins
Generator and the 3rd coupler are rushed, wherein, the 3rd coupler is respectively connecting to first coupler, second coupling
Device and the photodetector unit；The impulse generator is connected to the electrooptic modulator；The single side-band modulator, is used for
The frequency of the microwave frequency synthesizer is adjusted to control the frequency of light that the light source is sent, and exports continuous light；Described
One coupler, for the continuous light to be divided into two-way, all the way as the local oscillator light, another way through the electrooptic modulator and
The impulse generator is modulated into the pulsed light；The amplifier, for amplifying the pulsed light；Second coupler,
For the pulsed light to be sent into the tested sensor fibre, and the output pulsed light is caused by communication process
The backward Rayleigh scattering light；3rd coupler, for the backward Rayleigh scattering light to be passed together with the local oscillator light
Deliver to the photodetector unit.
In one embodiment, it is connected with the first Polarization Control between first coupler and the electrooptic modulator
Device, to ensure the input light polarization direction of the electrooptic modulator and its printing opacity overlapping of axles；First coupler and described the
The second Polarization Controller is connected between three couplers, the signal fluctuation brought is mismatched by polarization for reducing.
In one embodiment, sensor is provided with the tested sensor fibre, for gathering environment temperature and light
Cable strains.
In one embodiment, the data processing unit includes：Receiving module, for receiving the photodetector unit
The signal of output；Processing module, the signal for being exported to the photodetector unit are carried out at cumulative mean and Wavelet Denoising Method
Reason, obtains multigroup Rayleigh scattering power spectrum at different moments, to multigroup Rayleigh scattering power spectrum by distance, frequency, intensity
It is fitted, obtains the Rayleigh scattering power spectrum along the tested sensor fibre；Output module, for from the Rayleigh after fitting
Scatter spectrum obtains the frequency variation of light, and power information is obtained according to the frequency variation of the light, and by the electric power
Information exports the monitoring result as the monitoring result.
In one embodiment, the branched line of the backbone network is routed on basic routing line using backup fiber pass-by method.
In one embodiment, the light source is distributed feedback laser.
In one embodiment, the backbone network optical cable monitoring system also includes：Memory cell, for storing the backbone
The distributed intelligence of net；Edit cell, is inquired about for the distributed intelligence to the backbone network, is changed, being counted and form；Electricity
Source, for being powered for the backbone network optical cable monitoring system.
According to another aspect of the present invention, there is provided a kind of backbone network fiber optic cable monitor method, including：Sent according to light source
Light produce local oscillator light and pulsed light, wherein, the pulsed light is sent to tested sensor fibre；The pulsed light is being propagated through
Caused backward Rayleigh scattering light is sent to photodetector unit together with the local oscillator light in journey, carries out relevant detection；To institute
The signal for stating photodetector unit output carries out data processing, exports monitoring result；It is pre- that failure is carried out according to the monitoring result
It is alert；Abort situation is positioned based on GIS-Geographic Information System show map, and according to the map and the monitoring result, its
Described in map include the circuit and optical cable of backbone network.
In one embodiment, data processing, output monitoring knot are carried out in the signal exported to the photodetector unit
Before fruit, methods described also includes：Gather environment temperature and optical cable strain.
In one embodiment, data processing is carried out to the signal of photodetector unit output, exports monitoring result,
Including：Receive the signal of the photodetector unit output；Cumulative mean is carried out to the signal of photodetector unit output
With Wavelet Denoising Method processing, obtain multigroup Rayleigh scattering power spectrum at different moments, to multigroup Rayleigh scattering power spectrum press away from
From, frequency, intensity be fitted, obtain the Rayleigh scattering power spectrum along the tested sensor fibre；From the Rayleigh after fitting
Scatter spectrum obtains the frequency variation of light, and power information is obtained according to the frequency variation of the light, and by the electric power
Information exports the monitoring result as the monitoring result.
In one embodiment, before the light sent according to light source produces local oscillator light and pulsed light, methods described is also wrapped
Include：The branched line of the backbone network is routed on basic routing line using backup fiber pass-by method.
By the backbone network optical cable monitoring system and method for the present invention, can actively monitoring optical transmission system in real time transporting
Can, by analyzing the echo-signal and positional information of optical fiber, failure or hidden danger in timely discovery system, when an error occurs can
It is enough that abort situation fast positioning, accurate discriminating fault types are simultaneously in time notified fault message to operation maintenance personnel.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form limitation of the invention.In the accompanying drawings：
Fig. 1 is the structured flowchart of the backbone network optical cable monitoring system of the embodiment of the present invention；
Fig. 2 is that the light pulse of the embodiment of the present invention forms the structural representation of unit；
Fig. 3 is that the light pulse of the embodiment of the present invention forms another structural representation of unit；
Fig. 4 is the backbone network of the embodiment of the present invention by conceptual design schematic diagram；
Fig. 5 is the flow chart of the backbone network fiber optic cable monitor method of the embodiment of the present invention；
Fig. 6 is the configuration diagram of the backbone network optical cable monitoring system of the embodiment of the present invention.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
The embodiment of invention, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to protection scope of the present invention.
The embodiments of the invention provide a kind of backbone network optical cable monitoring system, Fig. 1 is the backbone network light of the embodiment of the present invention
The structured flowchart of cable monitoring system, as shown in figure 1, the system includes：Light source 10, light pulse form unit 20, Photoelectric Detection list
Member 30, data processing unit 40, prewarning unit 50 and display unit 60.
Light pulse forms unit 20, and the light for being sent according to light source 10 produces local oscillator light and pulsed light, wherein, pulsed light
Tested sensor fibre 70 is sent to, is transmitted after pulsed light is caused in communication process to Rayleigh scattering light together with local oscillator light
To photodetector unit 30；
Photodetector unit 30, for carrying out relevant detection to backward Rayleigh scattering light and local oscillator light；
Data processing unit 40, the signal for being exported to photodetector unit 30 carry out data processing, output monitoring knot
Fruit；
Prewarning unit 50, for carrying out fault pre-alarming according to monitoring result；
Display unit 60, for based on GIS-Geographic Information System show map, and according to the map with monitoring result to fault bit
Put and positioned, wherein map includes the circuit and optical cable of backbone network.
By above-mentioned backbone network optical cable monitoring system, can actively monitoring optical transmission system in real time transmission performance, by point
The echo-signal and positional information of optical fiber are analysed, failure or hidden danger in timely discovery system when an error occurs can be to failures
Position fast positioning, accurate discriminating fault types simultaneously in time notify fault message to operation maintenance personnel.
Light source 10 can be narrow linewidth, the distributed feedback laser (Distributed of powerful high frequency stability
Feedback Laser, referred to as DFB), to improve the measurement accuracy of backward Rayleigh scattering efficiency and system.The center of light source 10
Wavelength is an important parameter in electric power backbone network optical cable monitoring system, the dispersion in sensor fibre of the light of different wave length and
Attenuation characteristic is different.Preferably, the centre wavelength of light source can be 1.55 μm, line width 3MHz, power output 32mW.
It should be noted that whole fiber cable network can be divided into some sections, segmentation is monitored.The content mainly monitored
It can include：Luminous power data acquisition, light environment temperature acquisition, strain acquirement, fine early warning of breaking, fault location, optical cable deterioration
Deng.
In one embodiment, as shown in Fig. 2 light pulse formation unit 20 includes：The microwave frequency synthesis being sequentially connected
Device 21, single side-band modulator 22 (Single Side Band, referred to as SSB), the first coupler 23, electrooptic modulator 24
(Electro Optical Modulator, referred to as EOM), the coupler 26 of amplifier 25 and second, wherein, single sideband modulation
Device 22 is additionally coupled to light source 10, and the second coupler 26 is additionally coupled to tested sensor fibre 70.Light pulse forms unit 20 and also wrapped
Include：The coupler 28 of impulse generator 27 and the 3rd, wherein, the 3rd coupler 28 is respectively connecting to the first coupler 23, the second coupling
Clutch 26 and photodetector unit 30, impulse generator 27 are connected to electrooptic modulator 24.
Single side-band modulator 22, for adjusting the frequency of microwave frequency synthesizer 21 to control the frequency of light that light source 10 sends
Rate, and export continuous light.First coupler 23, for continuous light to be divided into two-way, all the way as local oscillator light, another way is through electric light
Modulator 24 and impulse generator 27 are modulated into pulsed light.Amplifier 25, for amplifying pulsed light, amplifier 25 can mix bait
Fiber amplifier (Erbium Doped Fiber Amplifier, referred to as EDFA).Second coupler 26, for by pulsed light
Be sent to tested sensor fibre 70, and output pulsed light caused by communication process after to Rayleigh scattering light.3rd coupling
Clutch 28, for backward Rayleigh scattering light to be sent into photodetector unit 30 together with local oscillator light.
In one embodiment, as shown in figure 3, (can be understood as electricity between the first coupler 23 and electrooptic modulator 24
The input of optical modulator 24) the first Polarization Controller 231 can be connected with, to ensure the input light polarization of electrooptic modulator 24
Direction and its printing opacity overlapping of axles.(i.e. local oscillator light path) it is inclined can be connected with second between first coupler 23 and the 3rd coupler 28
Shake controller 232, mismatches the signal fluctuation brought by polarization for reducing, eliminates polarization decay.
Light pulse forms unit 20 and can realize that by continuous light modulation be pulsed light, amplify optical signal and filter out ASE noises etc.
Function.Wherein, ASE (Amplified spontaneous emission) noise is the cumulative amplification in EDFA Erbium-Doped Fiber Amplifier
Spontaneous radiation.ASE noises are filtered out, Dynamic Range and signal to noise ratio can be increased.
Photodetector unit 30 can include photoelectric detector, low-noise amplifier, bandpass filter etc., and backward Rayleigh dissipates
Penetrate after the amplified filtering of light to enter and carry out relevant detection in photoelectric detector with local oscillator light, utilize relevant detection mode to suppress internal
Correlated noise.The electric signal that photodetector unit 30 exports is low frequency signal.
Sensor can be provided with tested sensor fibre 70, for gathering environment temperature and optical cable strain.Sense light
Fine circuit is used as sensor and signal transmission passage simultaneously, and making the terminating machine away from measure field, (prewarning unit 50 and display are single
Member 60 can be arranged at the terminating machine) corresponding information is obtained, while terminating machine is thoroughly avoided the interference of strong-electromagnetic field.Sense light
It is fine not influenceed the stability that also ensure that system by electromagnetic interference, instantaneous electric current, ambient humidity and corrosion.System is set
The temperature of meter, strain resolution can reach 0.01 DEG C/89ne, and spatial resolution reaches 1m, and measurement distance reaches 30km, can be set
Multistage constant temperature alarm, and can be modified for different site environments to increase the flexibility of system.
In one embodiment, data processing unit 40 can include：Receiving module 41, processing module 42 and output module
43.Wherein, receiving module 41, for receiving the signal of photodetector unit output；Processing module 42, for Photoelectric Detection list
The signal of member output carries out cumulative mean and Wavelet Denoising Method processing, multigroup Rayleigh scattering power spectrum at different moments is obtained, to this
Multigroup Rayleigh scattering power spectrum is fitted by distance, frequency, intensity, obtains the Rayleigh scattering power along tested sensor fibre
Spectrum；Output module 43, for obtaining the frequency variation of light from the Rayleigh scattering power spectrum after fitting, changed according to the frequency of light
Amount obtains power information, and using power information as monitoring result, exports monitoring result.
Specifically, detection light frequency, data processing unit are changed with certain stepped intervals by microwave frequency synthesizer 21
40 obtain one group of filtered, de-noising time domain waveform successively, and multigroup waveform is pressed into distance, frequency, intensity in computer software
3-D graphic is fitted to, obtains the Rayleigh scattering power spectrum along whole sensor fibre.The frequency variation of light and fiber lengths, light
The environment temperature and optical cable strain information that fiber sensor obtains are relevant, therefore can be (logical by testing and analyzing the echo-signal of optical fiber
Cross the reflection of Rayleigh scattering power spectrum) power information (such as line length information) is obtained, and then using GIS-Geographic Information System
(GIS) the actual geographic position of corresponding line is obtained.
In the present embodiment, because the signal received in the receiving terminal of data processing unit 40 is with random noise, so needing
Average and denoising, as far as possible Removing Random No influence is carried out to the signal received, so as to improve the precision of monitoring.Due to
Whole system is lost and the influence of noise, therefore, it is necessary to take multiple measurements, the result repeatedly measured is carried out cumulative mean and
Wavelet Denoising Method processing.
The structure of key Optical Transmission Network OTN is more complicated, and branched line is more with node, to basic routing line, branched line and
Node carries out comprehensive monitoring, and the Optical Transmission Network OTN of complex network structures can be handled using backup fiber pass-by method and optical switch stack method
Its topological structure, so as to carry out comprehensive monitoring according to network topology branch line.It on the one hand can so reduce and be opened using light
The quantity of pass, reduce monitoring cost：On the other hand can also reduce due to additional wires loss caused by increase optical switching device.
As shown in figure 4, it can be routed to for backbone network by conceptual design schematic diagram, the branched line of backbone network using backup fiber pass-by method
On basic routing line, A-B-C-D is the backbone network circuit for needing to monitor, it is contemplated that can not be implemented to branched line BE, CF, FG
Monitoring, branched line is routed on basic routing line using backup fiber pass-by method, as shown in the circuit 3,5,7 in Fig. 4, so as to
To realize the monitoring for branched line.
In one embodiment, above-mentioned backbone network optical cable monitoring system can also include：Memory cell, for storing backbone
The distributed intelligence of net；Edit cell, inquired about for the distributed intelligence to backbone network, change (add, change, or delete), system
Meter and form.Wherein, the distributed intelligence of backbone network can include：Network, circuit, optical cable, equipment and the people at place well, shaft tower
Deng.Pass through call storage optical fiber initial data, analysis contrast test optical fiber waveform change, it can be determined that optical fiber quality it is bad
Change and life-span etc. of estimation optical cable, so as to fiber cable network manager is made the upgrading of fiber cable network in time, change and
Maintenance plan.
Above-mentioned backbone network optical cable monitoring system can also include：Power supply, for being powered for backbone network optical cable monitoring system.Example
Such as, can use it is solar powered, largely saved the energy.
Used above, term " unit " or " module " can realize the software of predetermined function and/or the group of hardware
Close.Although system described by following examples is preferably realized with software, hardware, or the combination of software and hardware
Realization and may and be contemplated.Certainly, above-mentioned Module Division is a kind of signal division, the invention is not limited in
This.As long as the Module Division of the purpose of the present invention can be realized, protection scope of the present invention all should be belonged to.
The course of work of the backbone network optical cable monitoring system of foregoing description is as follows：
Microwave frequency synthesizer 21 drives single side-band modulator 22 to be realized by adjusting the frequency of microwave frequency synthesizer 21
The control of the frequency of the light sent to light source.It is divided into two through the first coupler 23 by the continuous light that single side-band modulator 22 exports
Road, pulsed light is modulated into through electrooptic modulator 24 as local oscillator light, another way all the way, is sent out after the amplification of EDFA Erbium-Doped Fiber Amplifier 25
It is sent to tested sensor fibre 70.Pass through the 3rd coupling to Rayleigh scattering light and local oscillator light after pulsed light is caused in communication process
Clutch 28 is added in photodetector unit 30 together carries out relevant detection, and the signal that photodetector unit 30 exports is sent to data
Processing unit 40, data processing is carried out after A/D is changed, obtains monitoring result.Failure is judged whether according to monitoring result, shown
Specific abort situation, and early warning is carried out, remind staff's timely processing.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of backbone network fiber optic cable monitor method, based on above-mentioned
Backbone network optical cable monitoring system is realized.It is similar to backbone network optical cable monitoring system to solve the principle of problem due to this method, therefore
The implementation of this method may refer to the implementation of the system, repeats part and repeats no more.
Fig. 5 is the flow chart of the backbone network fiber optic cable monitor method of the embodiment of the present invention, as shown in figure 5, this method is included such as
Lower step：
Step S501, the light sent according to light source produce local oscillator light and pulsed light, wherein, pulsed light is sent to tested biography
Photosensitive fibre；
Step S502, photoelectricity is sent to together with local oscillator light to Rayleigh scattering light after pulsed light is caused in communication process
Detection unit, carry out relevant detection；
Step S503, data processing is carried out to the signal of photodetector unit output, exports monitoring result；
Step S504, fault pre-alarming is carried out according to monitoring result；
Step S505, based on GIS-Geographic Information System show map, and abort situation is carried out with monitoring result according to the map
Positioning, wherein map includes the circuit and optical cable of backbone network.
By above-mentioned backbone network fiber optic cable monitor method, can actively monitoring optical transmission system in real time transmission performance, by point
The echo-signal and positional information of optical fiber are analysed, failure or hidden danger in timely discovery system when an error occurs can be to failures
Position fast positioning, accurate discriminating fault types simultaneously in time notify fault message to operation maintenance personnel.
In one embodiment, before step S503, the above method can also include：Gather environment temperature and optical cable should
Become.
In one embodiment, step S503 can include：Receive the signal of photodetector unit output；To Photoelectric Detection
The signal of unit output carries out cumulative mean and Wavelet Denoising Method processing, obtains multigroup Rayleigh scattering power spectrum at different moments, right
Multigroup Rayleigh scattering power spectrum is fitted by distance, frequency, intensity, obtains the Rayleigh scattering work(along tested sensor fibre
Rate is composed；The frequency variation of light is obtained from the Rayleigh scattering power spectrum after fitting, electric power letter is obtained according to the frequency variation of light
Breath, and using power information as monitoring result, export monitoring result.
Before step S501, the above method can also include：The branched line of backbone network is connect using backup fiber pass-by method
Continue on basic routing line.
The present invention backbone network optical cable monitoring system be appreciated that to be made up of multiple parts with relatively independent function,
Including：Automatic monitoring part, fiber optic resource management system part, GIS-Geographic Information System part, operation and service portion.With reference to figure
6 illustrate respectively.
(1) part is monitored automatically
The part is mainly performed to the real-time of whole fiber optic cable communications state (such as interruption of optical cables situation, light-path running situation)
Monitoring.Whole fiber cable network can be divided into some sections, be monitored and scanned by monitoring partial segments automatically.Main monitoring
Function includes：Luminous power data acquisition, light environment temperature acquisition, strain acquirement, fine early warning of breaking, fault location, optical cable deterioration
Deng automatic monitoring part is the most important part of backbone network optical cable monitoring system.
(2) fiber optic resource management system part
Fiber optic resource management system part is mainly that each hardware composition part of whole powerline network is managed.Pipe
Manage line resource (shaft tower, messenger wire, pipeline, people's well etc.), cable resource (optical cable, fibre core, joint etc.), light path resource (light path, light
Distributing frame, light jumping fiber etc.), and the browsing, inquire about of resource, search function, addition, deletion, editor, the modification of resource data are provided
And the statistics and report capability of resource.The part not only provides the management function of entity hardware resource, also provides patrolling for network
Collect resource function and Optical Cable management function (browsing, inquire about, retrieving for route).Can be complete by fiber optic resource management system part
Understand to orientation each hardware composition part of whole powerline network, facilitate the search and exclusion of failure.
Specifically, fiber optic resource management system part can be with combining geographic information system (Geographic Information
System, referred to as GIS) carry out development of resources.Good interface is provided based on GIS pattern technology for resource management to show
Show and interactive operating environment.Can be by establishing network management data library storage network, circuit, optical cable, equipment and people's well, the bar at place
The distributed intelligence of tower etc..
(3) GIS-Geographic Information System part
Fiber cable network covering region is extensive, various resource distributions in different geographical position, geography information resource management,
Played an important role in the realization of the functions such as fault location.GIS-Geographic Information System mainly uses GIS location technologies, to include geography
The map of information is background, and background is loaded with accurate geo-location (longitude, latitude) information and geographical graphic.On Background From Layer
Resource figure layer is superimposed, resource figure layer is loaded with the resources such as various circuits, optical cable, directly positions various resources by resource figure layer
Onto map, realize visualization to the geo-location and resource of Cable's Fault, physics and chemistry management.The resource of GIS-Geographic Information System
Figure layer is directly established on resource database and fiber optic resource management system system, user can directly be browsed by geographical map, inquired about,
Modification and edit asset object.GIS-Geographic Information System can also provide map for automatic monitoring part, realize that failure is accurately positioned,
Out of order exact position is directly marked on map.
(4) operation and service portion
The part mainly be responsible for optical cable day-to-day operation safeguard with resource allocation management, emphatically the control to the course of work with
And data resource is upgraded in time.
In summary, power system backbone network optical cable monitoring system provided in an embodiment of the present invention and method, can be supervised in real time
The transmission performance of light-metering Transmission system, failure or hidden danger in timely discovery system, not only with fault pre-alarming function, works as failure
Abort situation fast positioning, accurate discriminating fault types simultaneously in time can also be notified fault message to operation maintenance during generation
Personnel, it is significant to ensure that power system security is stably run for the fault time of shortening lightguide cable link for this.It is key
Net optical cable monitoring system is integrated with computer, communication, Database Systems, optical fiber measurement technology and GIS location technologies, using OTDR
By light by wavelength division multiplexer (Wavelength Division Multiplexing, referred to as WDM) He Guangguan be loaded into by
In light-metering fibre.System analyzes the echo-signal of optical fiber and the positional information of GIS alignment systems by OTDR, can be in computer screen
The route of optical cable is shown on curtain and obstacle location and sends alarm, administrative staff is intuitively grasped very much failure situation,
The process problem so that attendant is on the scene within the most short time, reduce the loss caused by failure.Meanwhile pass through tune
With the initial data of optical fiber in database, the change of analysis contrast test optical fiber waveform, judge the deterioration of optical fiber quality and estimate
Life-span of photometric cable etc., so as to make fiber cable network manager make the upgrading, replacing and maintenance plan of fiber cable network in time.
Any process or method described otherwise above description in flow chart or herein is construed as, and represents to include
Module, fragment or the portion of the code of the executable instruction of one or more the step of being used to realize specific logical function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, software that multiple steps or method can be performed in memory and by suitable instruction execution system with storage
Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, have suitable combinational logic gate circuit application specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Particular embodiments described above, the purpose of the present invention, technical scheme and beneficial effect are carried out further in detail
Describe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, the guarantor being not intended to limit the present invention
Scope is protected, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., should be included in this
Within the protection domain of invention.
Claims (10)
- A kind of 1. backbone network optical cable monitoring system, it is characterised in that including：Light source, light pulse form unit, Photoelectric Detection list Member, data processing unit, prewarning unit and display unit；The light pulse forms unit, and the light for being sent according to the light source produces local oscillator light and pulsed light, wherein, the arteries and veins Wash off and be sent to tested sensor fibre, to Rayleigh scattering light and the local oscillator after the pulsed light is caused in communication process Light is sent to the photodetector unit together；The photodetector unit, for carrying out relevant detection with the local oscillator light to the backward Rayleigh scattering light；The data processing unit, the signal for being exported to the photodetector unit carry out data processing, output monitoring knot Fruit；The data processing unit includes：Receiving module, for receiving the signal of the photodetector unit output；Processing module, Cumulative mean and Wavelet Denoising Method processing are carried out for the signal that is exported to the photodetector unit, obtains at different moments multigroup Rayleigh scattering power spectrum, multigroup Rayleigh scattering power spectrum is fitted by distance, frequency, intensity, obtained along the quilt The Rayleigh scattering power spectrum of the sensor fibre of survey；Output module, for obtaining the frequency of light from the Rayleigh scattering power spectrum after fitting Rate variable quantity, power information is obtained according to the frequency variation of the light, and using the power information as the monitoring result, Export the monitoring result；The prewarning unit, for carrying out fault pre-alarming according to the monitoring result；The display unit, for based on GIS-Geographic Information System show map, and according to the map and the monitoring result pair Abort situation is positioned, wherein the map includes the circuit and optical cable of backbone network.
- 2. backbone network optical cable monitoring system according to claim 1, it is characterised in that the light pulse forms unit bag Include：Microwave frequency synthesizer, single side-band modulator, the first coupler, electrooptic modulator, amplifier and the second coupling being sequentially connected Clutch, wherein, the single side-band modulator is additionally coupled to the light source, and second coupler is additionally coupled to the tested biography Photosensitive fibre；The light pulse, which forms unit, also to be included：Impulse generator and the 3rd coupler, wherein, the 3rd coupler connects respectively It is connected to first coupler, second coupler and the photodetector unit；The impulse generator is connected to described Electrooptic modulator；The single side-band modulator, for adjusting the frequency of the microwave frequency synthesizer to control light that the light source is sent Frequency, and export continuous light；First coupler, for the continuous light to be divided into two-way, all the way as the local oscillator light, another way is through the electricity Optical modulator and the impulse generator are modulated into the pulsed light；The amplifier, for amplifying the pulsed light；Second coupler, for the pulsed light to be sent into the tested sensor fibre, and the output pulse Light in communication process it is caused it is described after to Rayleigh scattering light；3rd coupler, for the backward Rayleigh scattering light to be sent into the Photoelectric Detection together with the local oscillator light Unit.
- 3. backbone network optical cable monitoring system according to claim 2, it is characterised in thatThe first Polarization Controller is connected between first coupler and the electrooptic modulator, to ensure the Electro-optical Modulation The input light polarization direction of device and its printing opacity overlapping of axles；The second Polarization Controller is connected between first coupler and the 3rd coupler, for reducing by not polarizing not With the signal fluctuation brought.
- 4. backbone network optical cable monitoring system according to claim 1, it is characterised in that set in the tested sensor fibre Sensor is equipped with, for gathering environment temperature and optical cable strain.
- 5. backbone network optical cable monitoring system according to claim 1, it is characterised in that the branched line profit of the backbone network It is routed to backup fiber pass-by method on basic routing line.
- 6. backbone network optical cable monitoring system according to any one of claim 1 to 5, it is characterised in that the light source is Distributed feedback laser.
- 7. backbone network optical cable monitoring system according to any one of claim 1 to 5, it is characterised in that the backbone network Optical cable monitoring system also includes：Memory cell, for storing the distributed intelligence of the backbone network；Edit cell, is inquired about for the distributed intelligence to the backbone network, is changed, being counted and form；Power supply, for being powered for the backbone network optical cable monitoring system.
- A kind of 8. backbone network fiber optic cable monitor method, it is characterised in that including：The light sent according to light source produces local oscillator light and pulsed light, wherein, the pulsed light is sent to tested sensor fibre；After the pulsed light is caused in communication process Photoelectric Detection is sent to Rayleigh scattering light together with the local oscillator light Unit, carry out relevant detection；Data processing is carried out to the signal of photodetector unit output, exports monitoring result；To the photodetector unit The signal of output carries out data processing, and output monitoring result includes：Receive the signal of the photodetector unit output；To described The signal of photodetector unit output carries out cumulative mean and Wavelet Denoising Method processing, obtains multigroup Rayleigh scattering work(at different moments Rate is composed, and multigroup Rayleigh scattering power spectrum is fitted by distance, frequency, intensity, obtained along the tested sense light Fine Rayleigh scattering power spectrum；The frequency variation of light is obtained from the Rayleigh scattering power spectrum after fitting, according to the frequency of the light Rate variable quantity obtains power information, and using the power information as the monitoring result, exports the monitoring result；Fault pre-alarming is carried out according to the monitoring result；Abort situation is positioned based on GIS-Geographic Information System show map, and according to the map and the monitoring result, Wherein described map includes the circuit and optical cable of backbone network.
- 9. backbone network fiber optic cable monitor method according to claim 8, it is characterised in that defeated to the photodetector unit The signal gone out carries out data processing, and before exporting monitoring result, methods described also includes：Gather environment temperature and optical cable strain.
- 10. backbone network fiber optic cable monitor method according to claim 8, it is characterised in that in the light production sent according to light source Before raw local oscillator light and pulsed light, methods described also includes：The branched line of the backbone network is continued using backup fiber pass-by method Onto basic routing line.
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| CN106785905A (en) * | 2017-01-19 | 2017-05-31 | 桂林电子科技大学 | A kind of electrooptic modulator based on Prague phase-shifted grating |
| CN107395269B (en) * | 2017-07-20 | 2021-02-05 | 全球能源互联网研究院 | Arrangement method and monitoring device for power optical fiber distribution communication network |
| CN108988938A (en) * | 2018-07-22 | 2018-12-11 | 国网山东省电力公司信息通信公司 | A kind of power telecom network optical cable Risk-warning and method of disposal |
| CN109039448A (en) * | 2018-08-10 | 2018-12-18 | 刘润宇 | A kind of fiber laser arrays maintaining-managing system |
| CN113330694A (en) * | 2018-11-16 | 2021-08-31 | 日本电气株式会社 | Optical transmission line monitoring device, optical transmission line monitoring system, and optical transmission line monitoring method |
| CN110166117B (en) * | 2019-05-17 | 2021-04-16 | 华南师范大学 | Fault monitoring system and method for long-distance double-path optical fiber unidirectional transmission |
| CN110611530B (en) * | 2019-09-03 | 2020-11-10 | 珠海格力电器股份有限公司 | Optical fiber fault determination method and device and photovoltaic centrifuge equipment |
| CN110987151A (en) * | 2019-12-17 | 2020-04-10 | 武汉伊莱维特电力科技有限公司 | Communication optical cable state real-time monitoring system |
| CN112803994B (en) * | 2021-02-03 | 2022-04-19 | 中航海信光电技术有限公司 | Optical echo tolerance testing device for optical module |
| CN113726426B (en) * | 2021-10-19 | 2022-07-01 | 国网新疆电力有限公司电力科学研究院 | Optical cable monitoring system with warning function |
| CN114039658B (en) * | 2021-11-12 | 2024-02-09 | 国网河南省电力公司邓州市供电公司 | Intelligent optical fiber monitoring system based on coherent light |
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