CN105490739A - System and method for monitoring optical cable of backbone network - Google Patents
System and method for monitoring optical cable of backbone network Download PDFInfo
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- CN105490739A CN105490739A CN201510829123.0A CN201510829123A CN105490739A CN 105490739 A CN105490739 A CN 105490739A CN 201510829123 A CN201510829123 A CN 201510829123A CN 105490739 A CN105490739 A CN 105490739A
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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 system and a method for monitoring an optical cable of a backbone network. The system comprises a light source, an optical pulse forming unit, a photoelectric detection unit, a data processing unit, an early warning unit and a display unit; the optical pulse forming unit is used for generating local oscillation light and pulsed light according to the light emitted by the light source, the pulsed light is transmitted to a measured sensing optical cable, and backward Rayleigh scattering light generated by the pulsed light in a propagation process is sent to the photoelectric detection unit together with the local oscillation light; the photoelectric detection unit is used for carrying out coherent detection on the backward Rayleigh scattering light and the local oscillation light; the data processing unit is used for carrying out data processing on the signal output by the photoelectric detection unit and outputting a monitoring result; the early warning unit is used for carrying out fault early warning according to the monitoring result; and the display unit is used for displaying a map and locating the fault position according to the map and the monitoring result, and the map comprises a backbone network circuit and an optical cable. The system and the method disclosed by the invention are used for actively monitoring the performance of the optical cable in real time, finding faults or hidden trouble in time and carrying out fault locating and fault early warning.
Description
Technical field
The present invention relates to fiber optic cable monitor technical field, particularly relate 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 substantially all built up the key cable network in metropolitan area of respective covering core customer.With traditional telecommunication, wireless other means of communication such as grade are compared, Fibre Optical Communication Technology has impayable superiority, namely message capacity is large, repeater span is long, security performance is good, adaptable, but the optical cable transmission network of this Large Copacity and long distance is to be checked by simple line inspection and breakdown repair of meeting an urgent need carries out maintenance management in Broadcast and TV system major part at present, along with welding breakpoint increases gradually, the performance of optical cable transmission network can be deteriorated gradually, and whether early stage laying optical cable arrives the aging time limit, whether potential faults increases fast, make somebody a mere figurehead in outdoor or the whether close criticality needing to change of ducted each several part lightguide cable link, the problems demand of these profound levels solves, in addition on the one hand, the key cable network in the metropolitan area that CHINA RFTCOM Co Ltd company has expands to for main the Broadband integrated service network supporting multiple application with broadcast television signal transport service from original, this development situation is also had higher requirement to optical cable maintenance management.
Communication of power system traffic department mainly adopts traditional manual mode passive maintenance circuit, staff adopts hand-held optical time domain reflectometer (OpticalTimeDomainReflectometer, referred to as OTDR) lightguide cable link to be tested, this maintenance mode has the following disadvantages:
(1) it is a kind of Passive Test mode, the transmission quality of the online fibre circuit used cannot be monitored initiatively, in real time, only have during communication disruption and just may find fault, and undertaken testing and fault distinguishing by manual test mode, but now because communication disruption causes impact to the operation of electric power system.
(2) traditional fault distinguishing method just judges whether the light device of transmission system reports to the police, and light device fault, various connection loose contact cannot be distinguished or be distributed in outdoor optical cable and there occurs damage, therefore directly affects the accuracy of fault distinguishing, science and promptness, bring very large difficulty to maintenance work.
For the problems referred to above, at present effective solution is not yet proposed.
Summary of the invention
The invention provides a kind of backbone network optical cable monitoring system and method, can not Timeliness coverage fault at least to solve existing Passive Test, and the problem that the accuracy of fault distinguishing is not high.
According to an aspect of the present invention, provide a kind of backbone network optical cable monitoring system, comprising: light source, light pulse forming unit, photodetector unit, data processing unit, prewarning unit and display unit; Described light pulse forming unit, light for sending according to described light source produces local oscillator light and pulsed light, wherein, described pulsed light is sent to tested sensor fibre, and what described pulsed light produced in communication process is sent to described photodetector unit to Rayleigh scattering light afterwards together with described local oscillator light; Described photodetector unit, for carrying out relevant detection to described backward Rayleigh scattering light and described local oscillator light; Described data processing unit, carries out data processing for the signal exported described photodetector unit, exports monitoring result; Described prewarning unit, for carrying out fault pre-alarming according to described monitoring result; Described display unit, for showing map based on GIS-Geographic Information System, and position abort situation according to described map and described monitoring result, wherein said map comprises circuit and the optical cable of backbone network.
In one embodiment, described light pulse forming unit comprises: the microwave frequency synthesizer connected successively, single side-band modulator, the first coupler, electrooptic modulator, amplifier and the second coupler, wherein, described single side-band modulator is also connected to described light source, and described second coupler is also connected to described tested sensor fibre; Described light pulse forming unit also comprises: pulse generator and the 3rd coupler, and wherein, described 3rd coupler is connected to described first coupler, described second coupler and described photodetector unit respectively; Described pulse generator is connected to described electrooptic modulator; Described single side-band modulator, for regulating the frequency of described microwave frequency synthesizer with the frequency of the light controlling described light source and send, and exports continuous light; Described first coupler, for described continuous light is divided into two-way, a road is as described local oscillator light, and another road is modulated into described pulsed light through described electrooptic modulator and described pulse generator; Described amplifier, for amplifying described pulsed light; Described second coupler, for described pulsed light is sent to described tested sensor fibre, and export that described pulsed light produces in communication process described rear to Rayleigh scattering light; Described 3rd coupler, for being sent to described photodetector unit by described backward Rayleigh scattering light together with described local oscillator light.
In one embodiment, between described first coupler and described electrooptic modulator, be connected with the first Polarization Controller, to ensure that the input light polarization direction of described electrooptic modulator overlaps with its light transmission shaft; Being connected with the second Polarization Controller between described first coupler and described 3rd coupler, not mating by polarization the signal fluctuation brought for reducing.
In one embodiment, in described tested sensor fibre, be provided with transducer, for gathering ambient temperature and optical cable strain.
In one embodiment, described data processing unit comprises: receiver module, for receiving the signal that described photodetector unit exports; Processing module, signal for exporting described photodetector unit carries out cumulative mean and Wavelet Denoising Method process, obtain not many groups Rayleigh scattering power spectrum in the same time, by distance, frequency, intensity, matching is carried out to described many group Rayleigh scattering power spectrum, obtains the Rayleigh scattering power spectrum along described tested sensor fibre; Output module, for obtaining the frequency variation of light from the Rayleigh scattering power spectrum after matching, the frequency variation according to described light obtains power information, and using described power information as described monitoring result, exports described monitoring result.
In one embodiment, the branched line of described backbone network utilizes backup fiber pass-by method to be routed on basic routing line.
In one embodiment, described light source is distributed feedback laser.
In one embodiment, described backbone network optical cable monitoring system also comprises: memory cell, for storing the distributed intelligence of described backbone network; Edit cell, for inquiring about the distributed intelligence of described backbone network, revising, add up and form; Power supply, for powering for described backbone network optical cable monitoring system.
According to another aspect of the present invention, provide a kind of backbone network fiber optic cable monitor method, comprising: produce local oscillator light and pulsed light according to the light that light source sends, wherein, described pulsed light is sent to tested sensor fibre; What described pulsed light produced in communication process is sent to photodetector unit to Rayleigh scattering light afterwards together with described local oscillator light, carries out relevant detection; Data processing is carried out to the signal that described photodetector unit exports, exports monitoring result; Fault pre-alarming is carried out according to described monitoring result; Based on GIS-Geographic Information System display map, and position abort situation according to described map and described monitoring result, wherein said map comprises circuit and the optical cable of backbone network.
In one embodiment, carry out data processing at the signal exported described photodetector unit, before exporting monitoring result, described method also comprises: gather ambient temperature and optical cable strain.
In one embodiment, data processing is carried out to the signal that described photodetector unit exports, export monitoring result, comprising: receive the signal that described photodetector unit exports; Cumulative mean and Wavelet Denoising Method process are carried out to the signal that described photodetector unit exports, obtain not many groups Rayleigh scattering power spectrum in the same time, by distance, frequency, intensity, matching is carried out to described many group Rayleigh scattering power spectrum, obtains the Rayleigh scattering power spectrum along described tested sensor fibre; Obtain the frequency variation of light from the Rayleigh scattering power spectrum after matching, the frequency variation according to described light obtains power information, and using described power information as described monitoring result, exports described monitoring result.
In one embodiment, before the light sent according to light source produces local oscillator light and pulsed light, described method also comprises: utilize backup fiber pass-by method to be routed on basic routing line by the branched line of described backbone network.
By backbone network optical cable monitoring system of the present invention and method, can the transmission performance of the optical transmission system of active monitoring in real time, by analyzing echo-signal and the positional information of optical fiber, fault in Timeliness coverage system or hidden danger, when an error occurs can to abort situation quick position, fault message is also informed to operation maintenance personnel by accurate discriminating fault types in time.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining 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 the structural representation of the light pulse forming unit of the embodiment of the present invention;
Fig. 3 is another structural representation of the light pulse forming unit of the embodiment of the present invention;
Fig. 4 is that the backbone network of the embodiment of the present invention is 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
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection scope of the present invention.
Embodiments provide a kind of backbone network optical cable monitoring system, Fig. 1 is the structured flowchart of the backbone network optical cable monitoring system of the embodiment of the present invention, as shown in Figure 1, this system comprises: light source 10, light pulse forming unit 20, photodetector unit 30, data processing unit 40, prewarning unit 50 and display unit 60.
Light pulse forming unit 20, light for sending according to light source 10 produces local oscillator light and pulsed light, wherein, pulsed light is sent to tested sensor fibre 70, and what pulsed light produced in communication process is sent to photodetector unit 30 to Rayleigh scattering light afterwards together with local oscillator light;
Photodetector unit 30, for carrying out relevant detection to backward Rayleigh scattering light and local oscillator light;
Data processing unit 40, carries out data processing for the signal exported photodetector unit 30, exports monitoring result;
Prewarning unit 50, for carrying out fault pre-alarming according to monitoring result;
Display unit 60, for showing map based on GIS-Geographic Information System, and position abort situation with monitoring result according to the map, wherein map comprises circuit and the optical cable of backbone network.
By above-mentioned backbone network optical cable monitoring system, can the transmission performance of the optical transmission system of active monitoring in real time, by analyzing echo-signal and the positional information of optical fiber, fault in Timeliness coverage system or hidden danger, when an error occurs can to abort situation quick position, fault message is also informed to operation maintenance personnel by accurate discriminating fault types in time.
Light source 10 can be the distributed feedback laser (DistributedFeedbackLaser, referred to as DFB) of narrow linewidth, powerful high frequency stability, to improve the certainty of measurement of backward Rayleigh scattering efficiency and system.The centre wavelength of light source 10 is important parameters in electric power backbone network optical cable monitoring system, and the Dispersion and attenuation characteristics of light in sensor fibre of different wave length is different.Preferably, the centre wavelength of light source can be 1.55 μm, and live width is 3MHz, and power output is 32mW.
It should be noted that, whole fiber cable network can be divided into some sections, segmentation is monitored.The content of main monitoring can comprise: luminous power data acquisition, light environment temperature acquisition, strain acquirement, disconnected fine early warning, fault location, optical cable deterioration etc.
In one embodiment, as shown in Figure 2, light pulse forming unit 20 comprises: the microwave frequency synthesizer 21 connected successively, single side-band modulator 22 (SingleSideBand, referred to as SSB), the first coupler 23, electrooptic modulator 24 (ElectroOpticalModulator, referred to as EOM), amplifier 25 and the second coupler 26, wherein, single side-band modulator 22 is also connected to light source 10, and the second coupler 26 is also connected to tested sensor fibre 70.Light pulse forming unit 20 also comprises: pulse generator 27 and the 3rd coupler 28, and wherein, the 3rd coupler 28 is connected to the first coupler 23, second coupler 26 and photodetector unit 30 respectively, and pulse generator 27 is connected to electrooptic modulator 24.
Single side-band modulator 22, for regulating the frequency of microwave frequency synthesizer 21 with the frequency of the light controlling light source 10 and send, and exports continuous light.First coupler 23, for continuous light is divided into two-way, a road is as local oscillator light, and another road is modulated into pulsed light through electrooptic modulator 24 and pulse generator 27.Amplifier 25, for amp pulse light, amplifier 25 can be Erbium-Doped Fiber Amplifier (ErbiumDopedFiberAmplifier, referred to as EDFA).Second coupler 26, for pulsed light being sent to tested sensor fibre 70, and export pulsed light produce in communication process rear to Rayleigh scattering light.3rd coupler 28, for being sent to photodetector unit 30 by backward Rayleigh scattering light together with local oscillator light.
In one embodiment, as shown in Figure 3, (can be understood as the input of electrooptic modulator 24) between first coupler 23 and electrooptic modulator 24 and can be connected with the first Polarization Controller 231, to ensure that the input light polarization direction of electrooptic modulator 24 overlaps with its light transmission shaft.Between first coupler 23 and the 3rd coupler 28, (i.e. local oscillator light path) can be connected with the second Polarization Controller 232, does not mate the signal fluctuation brought for reducing by polarization, eliminates polarization decay.
Light pulse forming unit 20 can realize continuous light being modulated to the functions such as pulsed light, amplifying optical signals and filtering ASE noise.Wherein, ASE (Amplifiedspontaneousemission) noise is the cumulative amplified spont-aneous emission in Erbium-Doped Fiber Amplifier.Filtering ASE noise, can increase Dynamic Range and signal to noise ratio.
Photodetector unit 30 can comprise photoelectric detector, low noise amplifier, band pass filter etc., and backward Rayleigh scattering light laggardly enters to carry out relevant detection with local oscillator light in photoelectric detector through amplifying to filter, and utilizes the detection mode that is concerned with to suppress inner correlated noise.The signal of telecommunication that photodetector unit 30 exports is low frequency signal.
Transducer can be provided with, for gathering ambient temperature and optical cable strain in tested sensor fibre 70.Sensor fibre circuit is used as transducer and signal transmission passage simultaneously, make the terminating machine (prewarning unit 50 and display unit 60 can be arranged at this terminating machine) away from measure field obtain corresponding information, make terminating machine thoroughly avoid the interference of strong-electromagnetic field simultaneously.Sensor fibre is by the impact of electromagnetic interference, instantaneous electric current, ambient humidity and corrosion. also ensure that the stability of system.The temperature of system, strain resolution can reach 0.01 DEG C/89ne, and spatial resolution reaches 1m, and measuring distance reaches 30km, can arrange multistage constant temperature and report to the police, and can carry out revising the flexibility increasing system for different site environments.
In one embodiment, data processing unit 40 can comprise: receiver module 41, processing module 42 and output module 43.Wherein, receiver module 41, for receiving the signal that photodetector unit exports; Processing module 42, signal for exporting photodetector unit carries out cumulative mean and Wavelet Denoising Method process, obtain not many groups Rayleigh scattering power spectrum in the same time, by distance, frequency, intensity, matching is carried out to this many groups Rayleigh scattering power spectrum, obtains the Rayleigh scattering power spectrum along tested sensor fibre; Output module 43, for obtaining the frequency variation of light from the Rayleigh scattering power spectrum after matching, the frequency variation according to light obtains power information, and using power information as monitoring result, exports monitoring result.
Concrete, detection light frequency is changed with certain stepped intervals by microwave frequency synthesizer 21, data processing unit 40 obtains one group of time domain waveform through filtering, de-noising successively, in computer software, fitting to 3-D graphic by distance, frequency, intensity by organizing waveform more, obtaining the Rayleigh scattering power spectrum along whole sensor fibre.The frequency variation of light is relevant with the ambient temperature that fiber lengths, Fibre Optical Sensor obtain and optical cable strain information, therefore obtain power information (such as line length information) by detecting the echo-signal (being reflected by Rayleigh scattering power spectrum) analyzing optical fiber, and then GIS-Geographic Information System (GIS) can be utilized to obtain the actual geographic position of corresponding line.
In the present embodiment, because the signal received at data processing unit 40 receiving terminal is with random noise, so need to be averaged to the received signal and denoising, the impact of Removing Random No as far as possible, thus improve the precision of monitoring.Due to the impact of whole system loss and noise, therefore, need to take multiple measurements, cumulative mean and Wavelet Denoising Method process are carried out to the result of repetitive measurement.
The complicated structure of key Optical Transmission Network OTN, branched line and node more, comprehensive monitoring to be carried out to basic routing line, branched line and node, backup fiber pass-by method and its topological structure of optical switch stack method process can be adopted to the Optical Transmission Network OTN of complex network structures, thus comprehensive monitoring can be carried out according to network topology branch line.Such one side can reduce the quantity using optical switch, reduces monitoring cost: also can reduce the additional wires loss brought owing to increasing optical switching device on the other hand.As shown in Figure 4, for backbone network is by conceptual design schematic diagram, the branched line of backbone network can utilize backup fiber pass-by method to be routed on basic routing line, A-B-C-D is the backbone network circuit needing monitoring, consider the monitoring cannot implemented branched line BE, CF, FG, utilize backup fiber pass-by method to be routed on basic routing line by branched line, as shown in the circuit 3,5,7 in Fig. 4, thus the monitoring for branched line can be realized.
In one embodiment, above-mentioned backbone network optical cable monitoring system can also comprise: memory cell, for storing the distributed intelligence of backbone network; Edit cell, for inquiring about, revising (add, change, or delete), statistics and form to the distributed intelligence of backbone network.Wherein, the distributed intelligence of backbone network can comprise: people's well, shaft tower etc. at network, circuit, optical cable, equipment and place.By calling the optical fiber initial data of storage, analyze the change of contrast test optical fiber waveform, the deterioration of optical fiber quality can be judged and estimate life-span etc. of optical cable, thus fiber cable network manager can be made to make the upgrading of fiber cable network, replacing and maintenance plan in time.
Above-mentioned backbone network optical cable monitoring system can also comprise: power supply, for powering for backbone network optical cable monitoring system.Such as, can adopt solar powered, save the energy to a great extent.
Above used, term " unit " or " module " can realize the software of predetermined function and/or the combination of hardware.Although the system described by following examples preferably realizes with software, hardware, or the realization of the combination of software and hardware also may and conceived.Certainly, above-mentioned Module Division just a kind of signal divides, and the present invention is not limited thereto.As long as the Module Division of object 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 by regulating the control of frequency realization to the frequency of the light that light source sends of microwave frequency synthesizer 21.The continuous light exported by single side-band modulator 22 is divided into two-way through the first coupler 23, and a road is as local oscillator light, and another road is modulated into pulsed light through electrooptic modulator 24, after Erbium-Doped Fiber Amplifier 25 is amplified, be sent to tested sensor fibre 70.What pulsed light produced in communication process carries out relevant detection to Rayleigh scattering light and local oscillator light by being added in photodetector unit 30 together with the 3rd coupler 28 afterwards, the signal that photodetector unit 30 exports is sent to data processing unit 40, change laggard row data processing through A/D, obtain monitoring result.Judge whether fault according to monitoring result, show concrete abort situation, and carry out early warning, remind staff to process in time.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of backbone network fiber optic cable monitor method, realizes based on above-mentioned backbone network optical cable monitoring system.The principle of dealing with problems due to the method is similar to backbone network optical cable monitoring system, and therefore the enforcement of the method see the enforcement of this system, can repeat part and repeat no more.
Fig. 5 is the flow chart of the backbone network fiber optic cable monitor method of the embodiment of the present invention, and as shown in Figure 5, the method comprises the steps:
Step S501, produce local oscillator light and pulsed light according to the light that light source sends, wherein, pulsed light is sent to tested sensor fibre;
Step S502, what pulsed light produced in communication process is sent to photodetector unit to Rayleigh scattering light afterwards together with local oscillator light, carries out relevant detection;
Step S503, carries out data processing to the signal that photodetector unit exports, and exports monitoring result;
Step S504, carries out fault pre-alarming according to monitoring result;
Step S505, based on GIS-Geographic Information System display map, and position abort situation with monitoring result according to the map, wherein map comprises circuit and the optical cable of backbone network.
By above-mentioned backbone network fiber optic cable monitor method, can the transmission performance of the optical transmission system of active monitoring in real time, by analyzing echo-signal and the positional information of optical fiber, fault in Timeliness coverage system or hidden danger, when an error occurs can to abort situation quick position, fault message is also informed to operation maintenance personnel by accurate discriminating fault types in time.
In one embodiment, before step S503, said method can also comprise: gather ambient temperature and optical cable strain.
In one embodiment, step S503 can comprise: receive the signal that photodetector unit exports; Cumulative mean and Wavelet Denoising Method process are carried out to the signal that photodetector unit exports, obtain not many groups Rayleigh scattering power spectrum in the same time, by distance, frequency, intensity, matching is carried out to this many groups Rayleigh scattering power spectrum, obtains the Rayleigh scattering power spectrum along tested sensor fibre; Obtain the frequency variation of light from the Rayleigh scattering power spectrum after matching, the frequency variation according to light obtains power information, and using power information as monitoring result, exports monitoring result.
Before step S501, said method can also comprise: utilize backup fiber pass-by method to be routed on basic routing line by the branched line of backbone network.
Backbone network optical cable monitoring system of the present invention is appreciated that as being made up of multiple part with relatively independent function, comprising: automatically monitor part, fiber optic resource management system part, GIS-Geographic Information System part, operation and maintenance part.Be described respectively below in conjunction with Fig. 6.
(1) automatically part is monitored
This part mainly performs the Real-Time Monitoring to whole fiber optic cable communications state (as interruption of optical cables situation, light path ruuning situation).Whole fiber cable network can being divided into some sections, being undertaken monitoring and scanning by automatically monitoring partial segments.Main monitoring function comprises: luminous power data acquisition, light environment temperature acquisition, strain acquirement, disconnected fine early warning, fault location, optical cable deterioration etc., 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 mainly manages each hardware composition part of whole powerline network.Managing line resource (shaft tower, messenger wire, pipeline, people's well etc.), cable resource (optical cable, fibre core, joint etc.), light path resource (light path, Optical Distribution Frame, light jumping fiber etc.), and the browsing of resource be provided, inquire about, search function, the statistics of the interpolation of resource data, deletion, editor, amendment and resource and report capability.This part not only provides the management function of entity hardware resource, also provides the logical resource function of network and Optical Cable management function (the browsing of route, inquire about, retrieve).Each hardware composition part of whole powerline network can be understood by fiber optic resource management system part in all directions, facilitate search and the eliminating of fault.
Concrete, fiber optic resource management system part combining geographic information system (GeographicInformationSystem, referred to as GIS) can carry out development of resources.Pattern technology based on GIS is that resource management provides good interface display and interactive operating environment.Can by setting up the distributed intelligence of people's well, shaft tower etc. at network management data library storage network, circuit, optical cable, equipment and place.
(3) GIS-Geographic Information System part
It is extensive that fiber cable network covers region, and various resource distribution is in different geographical position, and geography information plays an important role in the realization of the function such as resource management, fault location.GIS-Geographic Information System mainly adopts GIS location technology, and to comprise the map of geography information for background, background is loaded with accurate geo-location (longitude, latitude) information and geographical graphic.Background From Layer superposes resource layer, and resource layer has uploaded the resources such as various circuit, optical cable, is directly targeted on map by resource layer by various resource, realize to the geo-location of Cable's Fault and resource visual, physics and chemistry management.The resource layer of GIS-Geographic Information System is directly based upon in resource database and fiber optic resource management system system, and user can directly be browsed by geographical map, inquire about, revise and edit asset object.GIS-Geographic Information System can also provide map for monitoring part automatically, realizes fault and accurately locates, and map directly marks out of order exact position.
(4) operation and maintenance part
The day-to-day operation of this part primary responsibility optical cable safeguards and resource allocation manages, emphatically to the control of the course of work and upgrading in time to data resource.
In sum, the electric power system backbone network optical cable monitoring system that the embodiment of the present invention provides and method, can the transmission performance of Real-Time Monitoring optical transmission system, fault in Timeliness coverage system or hidden danger, not only there is fault pre-alarming function, when an error occurs can also to abort situation quick position, fault message is also informed to operation maintenance personnel by accurate discriminating fault types in time, this is for the fault time shortening lightguide cable link, ensures that power system safety and stability ground runs significant.Backbone network optical cable monitoring system is integrated with computer, communication, Database Systems, optical fiber measurement technology and GIS location technology, OTDR is adopted to be loaded in tested optical fiber by wavelength division multiplexer (WavelengthDivisionMultiplexing, referred to as WDM) He Guangguan by light.System analyzes the echo-signal of optical fiber and the positional information of GIS navigation system by OTDR, the route of optical cable and obstacle location can be demonstrated on the computer screen and send alarm, make administrative staff can grasp failure condition very intuitively, thus attendant is on the scene process problem within the shortest time, reduce the loss caused by fault.Simultaneously, by the initial data of optical fiber in calling data storehouse, analyze the change of contrast test optical fiber waveform, judge the deterioration of optical fiber quality and the life-span etc. of estimation optical cable, thus fiber cable network manager can be made to make the upgrading of fiber cable network, replacing and maintenance plan in time.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the application-specific integrated circuit (ASIC) of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; the protection range be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a backbone network optical cable monitoring system, is characterized in that, comprising: light source, light pulse forming unit, photodetector unit, data processing unit, prewarning unit and display unit;
Described light pulse forming unit, light for sending according to described light source produces local oscillator light and pulsed light, wherein, described pulsed light is sent to tested sensor fibre, and what described pulsed light produced in communication process is sent to described photodetector unit to Rayleigh scattering light afterwards together with described local oscillator light;
Described photodetector unit, for carrying out relevant detection to described backward Rayleigh scattering light and described local oscillator light;
Described data processing unit, carries out data processing for the signal exported described photodetector unit, exports monitoring result;
Described prewarning unit, for carrying out fault pre-alarming according to described monitoring result;
Described display unit, for showing map based on GIS-Geographic Information System, and position abort situation according to described map and described monitoring result, wherein said map comprises circuit and the optical cable of backbone network.
2. backbone network optical cable monitoring system according to claim 1, it is characterized in that, described light pulse forming unit comprises: the microwave frequency synthesizer connected successively, single side-band modulator, the first coupler, electrooptic modulator, amplifier and the second coupler, wherein, described single side-band modulator is also connected to described light source, and described second coupler is also connected to described tested sensor fibre;
Described light pulse forming unit also comprises: pulse generator and the 3rd coupler, and wherein, described 3rd coupler is connected to described first coupler, described second coupler and described photodetector unit respectively; Described pulse generator is connected to described electrooptic modulator;
Described single side-band modulator, for regulating the frequency of described microwave frequency synthesizer with the frequency of the light controlling described light source and send, and exports continuous light;
Described first coupler, for described continuous light is divided into two-way, a road is as described local oscillator light, and another road is modulated into described pulsed light through described electrooptic modulator and described pulse generator;
Described amplifier, for amplifying described pulsed light;
Described second coupler, for described pulsed light is sent to described tested sensor fibre, and export that described pulsed light produces in communication process described rear to Rayleigh scattering light;
Described 3rd coupler, for being sent to described photodetector unit by described backward Rayleigh scattering light together with described local oscillator light.
3. backbone network optical cable monitoring system according to claim 2, is characterized in that,
The first Polarization Controller is connected with, to ensure that the input light polarization direction of described electrooptic modulator overlaps with its light transmission shaft between described first coupler and described electrooptic modulator;
Being connected with the second Polarization Controller between described first coupler and described 3rd coupler, not mating by polarization the signal fluctuation brought for reducing.
4. backbone network optical cable monitoring system according to claim 1, is characterized in that, is provided with transducer in described tested sensor fibre, for gathering ambient temperature and optical cable strain.
5. backbone network optical cable monitoring system according to claim 4, is characterized in that, described data processing unit comprises:
Receiver module, for receiving the signal that described photodetector unit exports;
Processing module, signal for exporting described photodetector unit carries out cumulative mean and Wavelet Denoising Method process, obtain not many groups Rayleigh scattering power spectrum in the same time, by distance, frequency, intensity, matching is carried out to described many group Rayleigh scattering power spectrum, obtains the Rayleigh scattering power spectrum along described tested sensor fibre;
Output module, for obtaining the frequency variation of light from the Rayleigh scattering power spectrum after matching, the frequency variation according to described light obtains power information, and using described power information as described monitoring result, exports described monitoring result.
6. backbone network optical cable monitoring system according to claim 1, is characterized in that, the branched line of described backbone network utilizes backup fiber pass-by method to be routed on basic routing line.
7. backbone network optical cable monitoring system according to any one of claim 1 to 6, is characterized in that, described light source is distributed feedback laser.
8. backbone network optical cable monitoring system according to any one of claim 1 to 6, is characterized in that, described backbone network optical cable monitoring system also comprises:
Memory cell, for storing the distributed intelligence of described backbone network;
Edit cell, for inquiring about the distributed intelligence of described backbone network, revising, add up and form;
Power supply, for powering for described backbone network optical cable monitoring system.
9. a backbone network fiber optic cable monitor method, is characterized in that, comprising:
Produce local oscillator light and pulsed light according to the light that light source sends, wherein, described pulsed light is sent to tested sensor fibre;
What described pulsed light produced in communication process is sent to photodetector unit to Rayleigh scattering light afterwards together with described local oscillator light, carries out relevant detection;
Data processing is carried out to the signal that described photodetector unit exports, exports monitoring result;
Fault pre-alarming is carried out according to described monitoring result;
Based on GIS-Geographic Information System display map, and position abort situation according to described map and described monitoring result, wherein said map comprises circuit and the optical cable of backbone network.
10. backbone network fiber optic cable monitor method according to claim 9, is characterized in that, carry out data processing at the signal exported described photodetector unit, and before exporting monitoring result, described method also comprises:
Gather ambient temperature and optical cable strain.
11. backbone network fiber optic cable monitor methods according to claim 10, is characterized in that, carry out data processing to the signal that described photodetector unit exports, and export monitoring result, comprising:
Receive the signal that described photodetector unit exports;
Cumulative mean and Wavelet Denoising Method process are carried out to the signal that described photodetector unit exports, obtain not many groups Rayleigh scattering power spectrum in the same time, by distance, frequency, intensity, matching is carried out to described many group Rayleigh scattering power spectrum, obtains the Rayleigh scattering power spectrum along described tested sensor fibre;
Obtain the frequency variation of light from the Rayleigh scattering power spectrum after matching, the frequency variation according to described light obtains power information, and using described power information as described monitoring result, exports described monitoring result.
12. backbone network fiber optic cable monitor methods according to claim 9, it is characterized in that, before the light sent according to light source produces local oscillator light and pulsed light, described method also comprises: utilize backup fiber pass-by method to be routed on basic routing line by the branched line of described backbone network.
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