CN109802722A - A kind of optical cable generally investigates realization device synchronous with localization of fault - Google Patents
A kind of optical cable generally investigates realization device synchronous with localization of fault Download PDFInfo
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- CN109802722A CN109802722A CN201811645021.3A CN201811645021A CN109802722A CN 109802722 A CN109802722 A CN 109802722A CN 201811645021 A CN201811645021 A CN 201811645021A CN 109802722 A CN109802722 A CN 109802722A
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Abstract
The present invention relates to a kind of optical cables to generally investigate realization device synchronous with localization of fault, including optical interference circuit module, polarization light path module, wavelength division multiplexer and signal processing module；Optical interference circuit module is for issuing the first optical signal and generating interference signal, and receive the first optical signal of return, polarization light path module is used to issue the second optical signal and detects the polarization signal in the second optical signal, and receive the second optical signal returned, wavelength division multiplexer is used to the first optical signal and the second optical signal synthesizing a branch of optical signal, while isolating the return optical signal in optical cable to be measured；Signal processing module is used to acquiring and demodulating the first optical signal and the second optical signal after returning.Optical cable provided by the invention generally investigates realization device synchronous with localization of fault by generating miniature deformation to optical cable to be generally investigated optical cable and be positioned, generaI investigation and localization of fault can be carried out to optical cable simultaneously, this method measurement sensitivity is high, it is harmless to optical cable, operation convenience is greatly improved, the efficiency of optical cable generaI investigation and repairing is improved.
Description
Technical field
The present invention relates to fiber laser arrays maintenance technology fields, generally investigate more particularly to a kind of optical cable synchronous with localization of fault
Realization device.
Background technique
For optical fiber cable throughout each city in China, importance is self-evident.However optical cable is mostly layed in
Underground is aerial, then the maintenance and management of magnanimity optical cable just becomes problem, especially in aging, nature or artificial damage
When causing Cable's Fault, by effective operation of severe jamming information-intensive society, information security is influenced.Therefore quickly investigation and positioning
Position of failure point, carrying out repairing and recovery to failure optical cable within the shortest time becomes most important.
Currently, most of equipment can only carry out optical cable generaI investigation, fault point cannot be accurately positioned, and part can
The equipment for carrying out Cable's Fault point location, generally requires first to carry out optical cable generaI investigation, then carries out localization of fault again, use
Comparatively laborious, efficiency is relatively low, does not meet the repairing requirement to relief cable.
Summary of the invention
Based on this, it is necessary at least one problem mentioned above, provide a kind of optical cable generaI investigation and localization of fault
Synchronous realization device.
A kind of optical cable generally investigates realization device synchronous with localization of fault, including optical interference circuit module, polarizes light path module, wave
Division multiplexer and signal processing module, the optical interference circuit module and the polarization light path module are both connected to the wavelength-division multiplex
On device；The optical interference circuit module receives the first optical signal of return for issuing the first optical signal and generating interference signal,
The polarization light path module is used to issue the second optical signal and detects the polarization signal in second optical signal, and receives and return
The second optical signal returned, the wavelength division multiplexer are used to the first optical signal and the second optical signal synthesizing a branch of optical signal, simultaneously
Isolate the return optical signal in optical cable to be measured；The signal processing module is used to acquiring and demodulating first light after returning
Signal and the second optical signal.
In one of the embodiments, the optical interference circuit module include laser, the first coupler, the second coupler,
Postpone optical fiber and the first detector；The laser and first detector are connect with first coupler；Described
One coupler is connect with second coupler, and first coupler also passes through the delay optical fiber with second coupler
Connection；Second coupler is connect with the wavelength division multiplexer；First detector is connect with the signal processing module.
The polarization light path module includes laser, circulator, analyzer and the second detection in one of the embodiments,
Device, the laser are connect with the circulator, and the analyzer is connect with the circulator, second detector with it is described
Analyzer connection, the circulator are connect with the wavelength division multiplexer；Second detector and the signal processing module connect
It connects.
First optical signal is not identical as the wavelength of second optical signal in one of the embodiments,.
Optical cable provided by the invention generally investigate realization device synchronous with localization of fault by optical cable generation miniature deformation come
Optical cable to be generally investigated and is positioned, generaI investigation and localization of fault can be carried out to optical cable simultaneously, this method measurement sensitivity is high,
It is harmless to optical cable, operation convenience is greatly improved, the efficiency of optical cable generaI investigation and repairing is improved.
Detailed description of the invention
Fig. 1 is the module diagram that optical cable generally investigates realization device synchronous with localization of fault in one embodiment of the invention.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
The present invention provides a kind of optical cables to generally investigate realization device synchronous with localization of fault, as shown in Figure 1, including interference light
Road module 10, polarization light path module 20, wavelength division multiplexer 30 and signal processing module 40, wherein optical interference circuit module 10 with it is described
Polarization light path module 20 is both connected on wavelength division multiplexer 30.Optical interference circuit module 10 is for issuing the first optical signal and generating dry
Signal is related to, and receives the first optical signal of return, polarization light path module 20 is for issuing the second optical signal and detection the second light letter
Polarization signal in number, and the second optical signal returned is received, wavelength division multiplexer 30 is used for the first optical signal and the second light
Signal synthesizes a branch of optical signal, while isolating the return optical signal in optical cable to be measured.Signal processing module 40 for acquire and
The first optical signal and the second optical signal after demodulation return.Particularly, the first optical signal uses different waves from the second optical signal
It is long.
Specifically, optical interference circuit module 10 includes laser 100, the first coupler 11, the second coupler 12, delay optical fiber
13 and first detector 14.Wherein laser 100 and the first detector 14 are connect with the first coupler 11, the first coupler 11
It is connect with the second coupler 12, the first coupler 11 is also connect with the second coupler 12 by delay optical fiber 13 namely the first coupling
Clutch 11 is connect with the second coupler 12 using two-way, wherein connection medium all the way is using delay optical fiber 13.Second coupler
12 connect with wavelength division multiplexer 30, and the first detector 14 is connect with signal processing module 40, return to the transmission of signal processing module 40
The first optical signal returned.
Polarizing light path module 20 includes laser 100, circulator 21, analyzer 22 and the second detector 23, laser 100
It is connect with circulator 21, analyzer 22 is connect with circulator 21, and the second detector 23 is connect with analyzer 22, circulator 21 and wave
Division multiplexer 30 connects, and the second detector 23 connect with signal processing module 40, transmits the of return to signal processing module 40
Two optical signals.
The device for realizing optical cable generaI investigation function, by optical interference circuit module 10, wavelength division multiplexer 30, optical cable to be measured and signal
It manages module 40 to form, which realizes that the working principle of optical cable generaI investigation function is: the laser 100 in optical interference circuit module 10 produces
Third contact of a total solar or lunar eclipse signal injects optical cable to be measured by the first coupler 11 and delay optical fiber 13, and the first optical signal is on the road optical cable Zhong Yan to be measured
It generates reflection and returns to optical interference circuit module 10, the first optical signal is by the first coupler 11, delay optical fiber 13 and the second coupling
The optical path that device 12 forms, can generate 4 road optical signals, generation interference between them, via detector finally by signal processing module
40 are handled, and when any one place of optical cable to be measured is vibrated disturbance, will be changed in the phase for the optical signal wherein propagated,
Causing the optical power change of the first optical signal being finally reflected back, signal processing module 40 demodulates the variation and feeds back,
As optical cable is generally investigated.
Realize the device of fault location function by polarization light path module 20, wavelength division multiplexer 30, optical cable to be measured and signal
It manages module 40 to form, which realizes that the working principle of stationary positioned function is: laser 100 generates the second optical signal, passes through
Circulator 21 injects in optical cable to be measured, and Rayleigh scattering can be generated during the second optical signal transmits in testing fiber, wherein
Back rayleigh scattering light can pass through circulator 21 again along optical fiber reverse transfer, beaten by the optical signal of 22 analyzing of analyzer
Onto photodetector, optical signal is converted to electric signal, then carries out data acquisition by signal processing module 40 and carry out signal point
Analysis processing, the polarization state based on Rayleigh scattering optical signal to extraneous vibration signal than more sensitive mechanism, when optical cable to be measured is in office
It anticipates when being vibrated disturbance at one, can change in the polarization state for the optical signal wherein propagated, analyzer 22 detects polarization
The variation of state feeds back to detector and signal processing module 40, and signal processing module 40 demodulates the position of vibrational perturbation, real
Existing fault location.
By selecting different wavelength channels, the laser 100 of two different wave lengths can be used, two-way optical path is used
Wavelength division multiplexer 30 has carried out the integration and separation of light, and the first optical signal in optical interference circuit module 10 is wavelength X1Laser,
It is then λ by the wavelength that the laser 100 in wavelength division multiplexer 30 and polarization light path module 20 issues by MZ interferometer2
Laser be combined, into optical cable to be measured.When being applied with deformation or disturbance on optical cable to be measured, rear orientation light carries phase
The information answered, passes back through wavelength division multiplexer 30, then by wavelength X1With wavelength X2Light separate, wavelength λ1Light be directly entered
Detector, is acquired by data and demodulation obtains the signal of optical cable disturbance, thus realize that optical cable is generally investigated, and wavelength is λ2Light
The variation of polarization state is detected by circulator 21 and analyzer 22 to carry out fault location.The optical path of two parts module is
Work at the same time, while being demodulated, thus the device can simultaneously, Parallel Implementation optical cable generaI investigation and fault location, this method
Measurement sensitivity is high, and harmless to optical cable, operation convenience increases substantially, also the significant increase effect of optical cable generaI investigation and repairing
Rate.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (4)
1. a kind of optical cable generally investigates realization device synchronous with localization of fault, which is characterized in that including optical interference circuit module, polarised light
Road module, wavelength division multiplexer and signal processing module, the optical interference circuit module and the polarization light path module are both connected to institute
It states on wavelength division multiplexer；The optical interference circuit module receives return for issuing the first optical signal and generating interference signal
First optical signal, the polarization light path module are used to issue the second optical signal and detect the polarization letter in second optical signal
Number, and the second optical signal returned is received, the wavelength division multiplexer is used for the first optical signal and the second optical signal synthesis one
Beam optical signal, while isolating the return optical signal in optical cable to be measured；The signal processing module is for acquiring and demodulating return
First optical signal and the second optical signal afterwards.
2. optical cable according to claim 1 generally investigates realization device synchronous with localization of fault, which is characterized in that the interference
Light path module includes laser, the first coupler, the second coupler, delay optical fiber and the first detector；The laser and institute
The first detector is stated to connect with first coupler；First coupler is connect with second coupler, and described
One coupler is also connect with second coupler by the delay optical fiber；Second coupler and the wavelength division multiplexer
Connection；First detector is connect with the signal processing module.
3. optical cable according to claim 1 generally investigates realization device synchronous with fault location, which is characterized in that the polarised light
Road module includes laser, circulator, analyzer and the second detector, and the laser is connect with the circulator, the inspection
Inclined device is connect with the circulator, and second detector is connect with the analyzer, the circulator and the wavelength-division multiplex
Device connection；Second detector is connect with the signal processing module.
4. optical cable according to claim 1 generally investigates realization device synchronous with fault location, which is characterized in that first light
Signal is not identical as the wavelength of second optical signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811645021.3A CN109802722A (en) | 2018-12-29 | 2018-12-29 | A kind of optical cable generally investigates realization device synchronous with localization of fault |
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| CN201811645021.3A CN109802722A (en) | 2018-12-29 | 2018-12-29 | A kind of optical cable generally investigates realization device synchronous with localization of fault |
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Cited By (1)
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| CN114001926A (en) * | 2021-12-01 | 2022-02-01 | 上海大维通信技术有限公司 | Optical cable census analyzer and analog signal processing method thereof |
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