CN101566586B - External safety early-warning and positioning system of optical cable and optical-electrical compound cable - Google Patents
External safety early-warning and positioning system of optical cable and optical-electrical compound cable Download PDFInfo
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- CN101566586B CN101566586B CN2008100603963A CN200810060396A CN101566586B CN 101566586 B CN101566586 B CN 101566586B CN 2008100603963 A CN2008100603963 A CN 2008100603963A CN 200810060396 A CN200810060396 A CN 200810060396A CN 101566586 B CN101566586 B CN 101566586B
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Abstract
The invention discloses an external safety early-warning and positioning system of an optical cable and an optical-electrical compound cable, which mainly comprises an optical-fiber sensing optical system, a signal processing system and a system software, wherein the optical-fiber sensing optical system is a bidirectionallight path-sharing distributing optical-fiber interferometer; the signal processing system comprises a DFB semiconductor laser constant current drive circuit, a temperature control circuit, a PIN detector circuit and an AD switching and acquiring circuit; and the system software comprises a front-end acquiring and preprocessing software package, a wave analysis and feature extraction software package, a time delay judgment software package and a user interface. The external safety early-warning and positioning system of the optical cable and the optical-electrical compound cable can early warn a real-time safety warning and accurately positioning system of the communication optical cable before destroy events occur so that a communication maintenance unit can adopt corresponding precautionary measures before the events occur, thereby avoiding direct loss brought bythe damage.
Description
Technical field
The invention belongs to photoelectron and areas of information technology, the external safety early-warning and the positioning system of particularly a kind of optical cable, optoelectronic composite cable.
Background technology
Optical cable and photoelectricity composite cable are a kind of information transmission mediums that present optical communication industry and power industry extensively adopt, and the operation security of optical cable and photoelectricity composite cable is related to the guarantee of the stable and national economic interest of society.Therefore the early warning and the position monitor that the outside infringement incident in optical cable and the photoelectricity composite cable operation process are carried out real-time online are the keys of its safe operation of assurance.
The infringement of traditional optical cable and photoelectricity composite cable detects the main optical time domain reflectometer (OTDR) that adopts and carries out; This technology can only be destroyed under the situation that produces the fracture of optical cable inner fiber just effective by the infringement incident at optical cable; Can't realize the real-time online of infringement incident is detected, and can reduce along with the increase of cable length the bearing accuracy of breakpoint.A kind of in addition monitoring method is the senser element that adopts fiber grating etc. to have the ess-strain sensitivity characteristic carries out safety detection to optical cable words; This method must add fiber bragg grating device in optical cable; Thereby destroyed the transport property of optical cable itself, so these methods all can't realize online application on existing communications optical cable or photoelectricity composite cable.
Existing traditional optical cable on-line monitoring system all is after incident takes place, to report to the police, and at this moment, the destruction that incident produces forms, and the effect of emergency mechanism can only be the recovery of communication; Steal if data take place, also do not have the technical capability can be in advance at present, or even report to the police afterwards.
Summary of the invention
The objective of the invention is to provide a kind of and can give warning in advance, accurately locate, use optical cable simple and applied widely, the external safety early-warning and the positioning system of photoelectricity composite cable for the deficiency that solves above-mentioned technology.
In order to achieve the above object; A kind of optical cable that the present invention designed, the external safety early-warning and the positioning system of photoelectricity composite cable; Mainly comprise Fibre Optical Sensor optical system, signal processing system and system software; Wherein the Fibre Optical Sensor optical system is two-way light path distribution type fiber-optic interferometer altogether; Signal processing system is dfb semiconductor laser instrument constant-current drive circuit, temperature-control circuit, PIN detector circuit and AD conversion Acquisition Circuit, and system software comprises front-end collection and pretreatment software bag, wavelet analysis and feature extraction software bag, time delay judgement software package and user interface.
In optical system, described two-way altogether light path distribution type fiber-optic interferometer, optical fibre light splitting device and the sensing in communications optical cable or the photoelectricity composite cable that adopts two identical polarization irrelevants constitutes etc. the interferometer of brachium jointly with single-mode fiber; The light that the dfb semiconductor laser instrument sends adopts the optical fibre light splitting device to be divided into aplanatic two-way through behind the optoisolator, and distributing is input to the two ends of interferometer through different Transmission Fibers.Consistent for the additional phase error that makes the two-way interference signal, after the light of positive and negative both direction gets into the optical splitter that constitutes interferometer, must directly link to each other through straight-through arm.The two-way interference signal is got back to receiving end through different fibers; Convert light signal into electric signal through the PIN detector, obtain the consistent interference signal of two-way waveform, convert digital signal to through AD then; Get into system software and carry out pre-service; Extract characteristic through wavelet analysis then, input neural network calculates, the identification incident.After event recognition is accomplished, based on event property, adopt time delay algorithm that the occurrence positions of incident is positioned, final early warning and location of accomplishing to the infringement incident.
The present invention utilizes optical cable itself in communications optical cable or the photoelectricity composite cable as Sensitive Apparatus, and in conjunction with two-way distribution type fiber-optic interferometer technique with the light path polarization irrelevant, and combination wavelet analysis and neural network algorithm carry out external safety early-warning and location.
A kind of optical cable that the present invention obtains, the external safety early-warning and the positioning system of photoelectricity composite cable in conjunction with dfb semiconductor laser instrument and two-way light path fiber optic interferometric know-why altogether, significantly improve the alerting signal signal to noise ratio (S/N ratio); Incident based on the Signal Pretreatment algorithm of many wavestrips time-frequency spectrum signature analysis is judged, can realize the accurate judgement to the intrusion incident of multiple different threat communication link and data security, can judge multiple goal and eventful; Design radial base neural net with transform domain spacing wave distance for excitation function, realize the real-time training and the self study of neural network; Carry out real-time positioning based on auto-adaptive filtering technique and small echo generalized correlation technology to different events, can realize eventful real-time positioning.
The external safety early-warning and the positioning system of the resulting a kind of optical cable of the present invention, photoelectricity composite cable; The actual time safety of communications optical cable is reported to the police and accurate positioning system can early warning before destructive insident generation prerequisite; Make the communication unit of maintenance before incident takes place, just can take the corresponding precautionary measures; Thereby can avoid destroying the direct loss of bringing, like the material of optical fiber maintenance and labour cost etc.; Avoid the indirect loss brought, like communicating interrupt reparations of optical fiber applying unit etc.; Avoid destroying the negative effect that brings to socio-economic development; Take measures in advance, avoid the stolen of data.
For fiber backbone network; Long-distance optical fiber backbone network particularly; Except incident is had shift to an earlier date corresponding, the promptness of the enforcement of the precautionary measures that incident is taken place and validity are with even more important, 100 meters bearing accuracies of the enforcement security alarm of communications optical cable and accurate positioning system provide sufficient technical guarantee for this reason; Thereby the effect that can reach is: practiced thrift the investigation time that incident is taken precautions against, the precautionary measures that take place for incident provide time margin; Make the related personnel nearby time of arrival on-the-spot, improved personnel's service efficiency; From technological layer is that the detection that data are stolen incident provides true foundation.
The external safety early-warning of optical cable provided by the invention, cable and positioning system; Need not on existing fiber optic network, to do any construction, only need system of the present invention to be installed, can reach the design function of system at the node two ends of communication optical fiber; Therefore; System of the present invention is not only applicable to terrestrial environment, is applicable to underwater environment yet, make it to use simple, suitable environment is wide.
Description of drawings
Fig. 1 is optical cable/cable external safety early-warning and positioning system overall architecture structural representation;
Fig. 2 processing unit frame construction synoptic diagram;
Fig. 3 host computer system frame construction synoptic diagram;
Fig. 4 is the external safety early-warning and the positioning system block diagram of optical cable and photoelectricity composite cable.
Wherein: (a) front end sensing unit (b) rear end sensing unit (c) host server and software systems (d) control modules (e) processing unit
Embodiment
Combine accompanying drawing that the optical cable of the present invention design and photoelectricity composite cable external safety early-warning and positioning system are described further through embodiment below.
Embodiment:
Optical cable and the photoelectricity composite cable external safety early-warning and the positioning system of the present invention's design, total system makes up like Fig. 1, and system is controlled through mainframe program by operating personnel.Operating personnel are through the electronic chart of mainframe program interface start-up system and loading system institute infield.Operating personnel carry out the parameter setting to system environments and specific requirement after through the correlation technique training.Sensor begins real-time telecommunication optical fiber is monitored behind the program start, constantly sends laser signal as input stimulus to sensing unit, and the light signal that obtains reception simultaneously transfers electric signal to and carries out filtering and amplification.Accomplishing signal after the above-mentioned processing will be converted into the very high digital signal of sampling rate through the high-speed AD acquisition plate and send control module to and carry out further signal analysis and processing.The neural network of control module trains before installing.Through control module, system discerns to judge whether that event occurs the signal that collects in real time.Obtain its positional information and carry out early warning and warning to main frame if judge that event occurs then incident positioned through remote alarm interface.To feed back typical event information and deposit the typical data storehouse in by main frame after each event recognition success.Control module will utilize the information of typical data Ku Neixin that network is fed back the reinforcement training simultaneously.In case receive warning message from control module, display alarm information on the position of incident will take place at electronic chart in system automatically.Simultaneity factor can also be carried out the further affirmation of incident or drive relay starting emergent scheme like the first-class device of making a video recording based on the third-party auxiliary watch-dog of startup of operating personnel's configuration automatic or manual.The details of incident will deposit background data base in and pass through other platforms of network destined.After obtaining confirming, incident will feed back to control module in order to strengthen neural metwork training as typical event.
Wherein each unit module is introduced:
1) front end sensing unit 2211 and terminal sensing unit 2221:
As shown in Figure 1, be the connection networking termination unit of distributing optical fiber sensing optical system, constitute the two-way altogether light path distribution type fiber-optic interferometer of polarization irrelevant with monitored optical cable.The optical fibre light splitting device 4 of polarization irrelevant and 5 and communications optical cable in optical fiber 61,62 constitute the Mach-Zehnder interferometers jointly; After entering into isolator 2 and Polarization Controller 7 from the light of LASER Light Source from optical fiber 1,, export with 321 from output terminal 312 respectively through the input end 311 of optical fibre light splitting device 3; The light of output terminal 312 gets into fibre optic interferometer through the input end 411 of optical splitter 4, from output terminal 522 outputs of optical splitter 5, gets back to receiving end 81 through optical fiber 63; The light of output terminal 321 gets into fibre optic interferometer through the input end 512 that optical fiber 64 is input to optical splitter 5, from output terminal 421 outputs of optical splitter 4, gets back to receiving end 82.
2) processing unit 3211:
The processing unit structure is as shown in Figure 2; Form by laser instrument, the luminous receipts driving circuit of light, photoelectric switching circuit, laser power control circuit, simulation amplification and parts such as wave filter, high-speed AD acquisition plate, mainly be used for accomplishing transmission, reception and the power adjustment of laser.System constantly sends laser signal as input stimulus to sensing unit, and the light signal that obtains reception simultaneously transfers electric signal to and carries out filtering and amplification.Accomplishing signal after the above-mentioned processing will be converted into the very high digital signal of sampling rate through the high-speed AD acquisition plate and send control module to and carry out further signal analysis and processing.
3) control module 4211:
Form by parts such as wavelet sub-band decomposition, proper vector generation, neural metwork training, neural network identification, incident location, remote alarm interface.The digital signal that this unit at first sends processing unit is carried out the wavelet sub-band decomposition, obtains the time-frequency of each subband and the proper vector that energy feature is imported as neural network according to the result who decomposes then.Thereby obtaining sample according to actual environment trains neural network and obtains required neural network model.The signal to collecting that system just can be real-time is afterwards discerned to judge whether that event occurs.Obtain its positional information and carry out early warning and warning to main frame if judge that event occurs then incident positioned through remote alarm interface.To feed back typical event information and deposit the typical data storehouse in by main frame after each event recognition success.Control module will utilize the information of typical data Ku Neixin that network is fed back the reinforcement training simultaneously.
4) host computer system and host software:
Host computer system such as Fig. 3, shown in Figure 4 comprise system integration control, third party device control, relay driving, user interface, typical event affirmation, parts such as background data base and network service and electronic chart.Main frame plays control to total system, the parameter setting, and local area network building, the auxiliary watch-dog that control third company provides drives relay and starts emergency set, stores the concurrent alert log information of delivering newspaper to functions such as specified network platforms.Operating personnel can be through the electronic chart of mainframe program interface start-up system and loading system institute infield.Operating personnel can also carry out the parameter setting to system environments and specific requirement after through the correlation technique training.In case receive warning message from control module, display alarm information on the position of incident will take place at electronic chart in system automatically.Simultaneity factor can also be carried out the further affirmation of incident or drive relay starting emergent scheme like the first-class device of making a video recording based on the third-party auxiliary watch-dog of startup of operating personnel's configuration automatic or manual.The details of simultaneous events will deposit background data base in and pass through other platforms of network destined.After obtaining confirming, incident will feed back to control module in order to strengthen neural metwork training as typical event.
Claims (1)
1. the external safety early-warning and the positioning system of an optical cable, photoelectricity composite cable; Mainly comprise Fibre Optical Sensor optical system, signal processing system and system software; It is characterized in that described Fibre Optical Sensor optical system is two-way light path distribution type fiber-optic interferometer altogether; Signal processing system is dfb semiconductor laser instrument constant-current drive circuit, temperature-control circuit, PIN detector circuit and AD conversion Acquisition Circuit; System software comprises front-end collection and pretreatment software bag, wavelet analysis and feature extraction software bag, time delay judgement software package and user interface; Described two-way altogether light path distribution type fiber-optic interferometer adopts sensing in two optical fibre light splitting devices identical and polarization irrelevant and communications optical cable or the photoelectricity composite cable to constitute etc. the interferometer of brachium jointly with single-mode fiber; The light that the dfb semiconductor laser instrument sends adopts the optical fibre light splitting device to be divided into aplanatic two-way through behind the optoisolator, is input to the two ends of interferometer respectively through different Transmission Fibers; After the light of positive and negative both direction gets into the optical splitter that constitutes interferometer, directly link to each other through straight-through arm; The two-way interference signal is got back to receiving end through different fibers; Convert light signal into electric signal through the PIN detector, obtain the consistent interference signal of two-way waveform, convert digital signal to through AD then; Get into system software and carry out pre-service; Extract characteristic through wavelet analysis then, input neural network calculates, the identification incident; After event recognition is accomplished, according to event property, adopt time delay algorithm that the occurrence positions of incident is positioned, final early warning and location of accomplishing to the infringement incident.
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| CN2008100603963A CN101566586B (en) | 2008-04-22 | 2008-04-22 | External safety early-warning and positioning system of optical cable and optical-electrical compound cable |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632510A (en) * | 2013-12-04 | 2014-03-12 | 国家电网公司 | Pre-warning system for preventing high-voltage underground long-distance-transmission power cable from being damaged by external force |
| CN104297845A (en) * | 2014-10-13 | 2015-01-21 | 武汉锐科光纤激光器技术有限责任公司 | Laser fiber transmission system capable of monitoring cladding light and feedback light |
| CN105490739B (en) * | 2015-11-25 | 2018-02-06 | 国家电网公司 | Backbone network optical cable monitoring system and method |
| CN108957209B (en) * | 2018-08-01 | 2020-11-24 | 四川特旺通信科技有限公司 | Automatic broken line detection device for communication optical fiber cable production |
| CN111207304B (en) * | 2018-11-22 | 2021-09-14 | 北京世纪东方通讯设备有限公司 | Railway tunnel leaky cable vision inspection device and product positioning detection method |
| CN110335430A (en) * | 2019-06-19 | 2019-10-15 | 中国科学院自动化研究所 | Monitoring pipeline safety system, method and apparatus based on deep learning |
| CN111275947A (en) * | 2020-02-12 | 2020-06-12 | 广东电网有限责任公司 | Power cable external construction monitoring system and method |
| CN116405110B (en) * | 2023-06-06 | 2023-08-15 | 四川天中星航空科技有限公司 | Multi-core optical cable fault positioning analysis equipment |
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