CN103532616B - Integrative optical cable fault detection device - Google Patents
Integrative optical cable fault detection device Download PDFInfo
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- CN103532616B CN103532616B CN201310470926.2A CN201310470926A CN103532616B CN 103532616 B CN103532616 B CN 103532616B CN 201310470926 A CN201310470926 A CN 201310470926A CN 103532616 B CN103532616 B CN 103532616B
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Abstract
The invention provides an integrative optical cable fault detection device, which comprises an optical time-domain reflectometer, a red light source laser, an optical power detector, a single-end type Sagnac interference optical cable identification instrument, three 1*2 matrix optical switches used for function switching, a multiplexing optical switch and four signal lines used for controlling the four optical switches. The integrative optical cable fault detection device disclosed by the invention combines an optical time-domain reflectometer fault positioning function, a red light source visual fault positioning function, an optical power meter measurement function and an optical cable identification function into a whole, and the portable high-integration optical cable fault detection device characterized in single-port output can be used for quickly diagnosing the optical cable fault.
Description
Technical field
The present invention relates to detection technique field, particularly to a kind of integrative optical cable fault detection device.
Background technology
It is in the optical cable maintenance of Networks of Fiber Communications and logistics support, increasingly complicated with Networks of Fiber Communications circuit,
Increase optical cable maintenance and the workload ensureing, therefore safeguarded that Diagnostic Time becomes the important mark weighing Cable's Fault tester
Accurate.Existing measuring technology mainly include optical time domain reflectometer (otdr), visual HONGGUANG fault location, optical channel power measurement and
The optical cable identification interfered based on sagnac.
It is using identical and formed along the light path that transmits clockwise and anticlockwise based on the optical cable identifier that sagnac interferes
White light interference theory, by detect light intensity change and perceive optic cable vibration information, complicated light can be realized using this technology
Optical cable identification in cable road, accurately finds out the corresponding relation of input optical fibre and output optical fibre in optical cable.Fig. 1 show monofocal
The optical cable identifier that sagnac interferes, include optical cable identification laser instrument 10, photodetector 30,3 × 3 bonders 11 and optical fiber every
From device 12.Optical cable identifies that the continuous light that laser instrument 10 produces enters 3 × 3 bonder 11 from second port 2, and light is divided into 2 tunnels: light
Path one 2 → 5 → 6 → 5 → 1 → 4 → 3 and light path 22 → 4 → 1 → 5 → 6 → 5 → 3 equivalent optical path, and it is all 3 times through 3
× 3 bonders, so the equivalent optical path of two-way light, amplitude are identical, simply compared with light path one, light path two receives disturbance
Time delayses τ, in order that two-way light forms stable interference and requires light source to send continuous laser, and requires optical cable identification laser
Device spectral width is big, thus effectively suppressing noise.Change through photodetector and filter Constant Direct Current item therein and height
The output voltage signal obtaining the interference light intensity in the range of linearity after rank alternation item is:
In formula, n is optical fibre refractivity, and r is the responsiveness of photodetector, and rl is load resistance, and k is answering of fiber optic materials
Power and the proportionality coefficient of fiber lengths rate of change, ξ is fibre strain coefficient, and l is time delay optical fiber length, and c is vacuum light speed, and λ is
Vacuum optical source wavelength, poFor incident optical power, p is the stress that the vibration being applied in tested optical fiber causes.For two-way light letter
Number proper phase causing because of 3 × 3 bonders is poor,Be can be seen that tested when there being vibration to be applied to by formula (1)
During optical fiber, tested voltage will be caused to change, thus realizing the identification to fault optical cable.
As shown in Fig. 2 optical time domain reflectometer includes optical cable seeks barrier laser instrument 20, wavelength division multiplexer 26, fiber optical circulator 27
With photodetector 30, wherein, optical cable is sought barrier laser instrument 20 and is included 1310 pulse lasers 24 and 1550 pulse lasers 25.Light
Ultrashort light pulse is injected tested optical fiber by domain reflectometer, realizes the accurately fixed of fiber failure by measuring back rayleigh scattering light
Position, sends trigger to pulse laser and avalanche photodide using trigger source simultaneously, when light pulse is injected by light-metering
After fibre, each position in a fiber is produced the Rayleigh scattering light related to this position, therefore pass through detection fiber each position anti-
The light intensity being emitted back towards photodetector is the distinguishable fault such as whether rupture, bend；Simultaneously because the Rayleigh that each position produces
The time that scattered light returns photodetector 30 is different, can get the accurate location of each point, position by calculating time of return
Computing formula isWherein c/n is light spread speed in a fiber, and δ t is to detecting certain position from trigger
Put the time difference of scattered light.
Visual HONGGUANG fault location is to inject tested optical fiber using the visible laser source of 650nm, in the optical fiber breaking down
It is seen that HONGGUANG can leak in a large number, therefore human eye can be directly observed trouble point for position, non-in short range cable fault detect
Chang Youxiao.
Optical channel power measurement is the ancillary method of Cable's Fault diagnosis, by injecting laser at fibre optical transmission end, in light
The break-make to judge optical-fibre channel for the fine distal probe luminous power.
Optical time domain reflectometer can only realize the positioning of fiber failure point, but cannot accurately find out event from numerous fibre circuits
Barrier optical fiber carries out optical cable maintenance it is necessary to be aided with optical cable identifier；Visual HONGGUANG fault location is due to loss in a fiber relatively
Greatly, short distance fibre circuit can only be diagnosed；Optical channel power measurement can measure to fault optical fiber, but need by
One measurement, diagnosis amount is heavy.
Instrument majority currently used for optical cable maintenance test only has single function, such as light source, light power meter, optical time domain
Reflexometer, optical cable identifier etc., separate unit instrument can not complete the multifunctional testing to optical cable, and be made up of multiple test instrunments
Test system is bulky, complex operation, carry highly inconvenient etc. it is impossible to meet optical cable in modern Networks of Fiber Communications system
The demand safeguarded.
Content of the invention
For solving the above problems, the present invention proposes a kind of integrative optical cable fault detection device, collects optical time domain reflectometer
Cable's Fault positioning function, red light source visual fault positioning function, light power meter measurement function and optical cable identification function are in one
, portable, Highgrade integration, and the Cable's Fault detection means of single port output, being capable of quick diagnosis Cable's Fault.
The technical scheme is that and be achieved in that:
A kind of integrative optical cable fault detection device, comprising: optical time domain reflectometer, red light source laser instrument, optical power detecting
The optical cable identifier that device and monofocal sagnac interfere, also include 31 × 2 matrix optical switch for function switching, one multiple
It is used for controlling the holding wire of described 4 photoswitches with photoswitch and four；
The optical cable identifier that monofocal sagnac interferes includes optical cable identification laser instrument, photodetector, 3 × 3 bonders
And fibre optic isolater；
Optical time domain reflectometer includes optical cable and seeks barrier laser instrument, wavelength division multiplexer, fiber optical circulator and photodetector；
The first input end of the first photoswitch is connected to the outfan of the second photoswitch, and its second input is connected to the 3rd
The outfan of photoswitch, its outfan is connected to tested optical fiber；
The first input end of the second photoswitch is connected to the outfan of red light source laser instrument, and its second input is connected to list
The fifth port of 3 × 3 bonders of end formula sagnac optical interference circuit, its outfan is connected to the first input of the first photoswitch
End；
The first input end of the 3rd photoswitch is connected to the first outfan of the optical fiber circulator of optical time domain reflectometer, and it
One outfan is connected to the second input of the first photoswitch, and its second outfan is connected to the input of optical power detector；
The first input end of the 4th photoswitch is connected to the second outfan of fiber optical circulator, and its second input is connected to
3rd port of 3 × 3 bonders, its outfan is connected to the input of photodetector；
Wherein first holding wire (d1) is connected with the first input end of the first photoswitch, the first input end of the second photoswitch
Connect；Secondary signal line (d2) is connected with the second input of the second photoswitch, the second input of the 4th photoswitch；3rd letter
Number line (d3) is connected with the first input end of the 3rd photoswitch, the 4th photoswitch first input end；4th holding wire (d4) with
Second input of the first photoswitch, the second outfan of the 3rd photoswitch are connected.
Alternatively, described four holding wire d1d2d3d4=1000, the output signal of red light source laser instrument is transferred to by light-metering
Fine.
Alternatively, described four holding wire d1d2d3d4=1000, after be set to d1d2d3d4=0100, described 3 × 3 coupling
The fifth port of device is connected with tested optical fiber, and the 3rd port of 3 × 3 bonders is connected with photodetector.
Alternatively, described four holding wire d1d2d3d4=0001, optical power detector outfan is connected to tested optical fiber.
Alternatively, described four holding wire d1d2d3d4=0001, after be set to d1d2d3d4=0010, fiber optical circulator
First outfan is connected to optical power detector, and the first outfan of fiber optical circulator is connected to tested optical fiber, fiber optical circulator
The second outfan be connected to photodetector.
Alternatively, described red light source laser instrument is 650nm red light source laser instrument.
Alternatively, optical power detector is pin near infrared photodetector.
The invention has the beneficial effects as follows: integrative optical cable fault detection device, collection optical time domain reflectometer Cable's Fault positioning
Function, red light source visual fault positioning function, light power meter measurement function and optical cable identification function are in one, portable, highly
Integrated, and the Cable's Fault detection means of single port output, being capable of quick diagnosis Cable's Fault.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
The structural representation of the optical cable identifier that Fig. 1 interferes for monofocal sagnac；
Fig. 2 is the structural representation of optical time domain reflectometer；
Fig. 3 is the structural representation of integrative optical cable fault detection device of the present invention.
Specific embodiment
Below in conjunction with 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
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Currently used for Cable's Fault detection instrumental function single, time-consuming for fault diagnosis, and by optical time domain reflectometer,
The test system presence of the discrete instrument such as red light source VFL, light power meter, optical cable identifier composition carries side
Just, complex operation, the low problem of Cable's Fault diagnosis efficiency.The present invention is directed to the shortcoming and defect of prior art, proposes a kind of
Integrative optical cable fault detection device, collection optical time domain reflectometer Cable's Fault positioning function, red light source visual fault positioning function,
Light power meter measurement function and optical cable identification function are in one, portable, Highgrade integration, and the Cable's Fault of single port output
Detection means, being capable of quick diagnosis Cable's Fault.
The integrative optical cable fault detection device of the present invention includes optical time domain reflectometer, red light source laser instrument, luminous power spy
Survey the optical cable identifier that device and monofocal sagnac interfere.Optical time domain reflectometer realizes lookup and the positioning of fiber failure, HONGGUANG
The visual positioning of fiber failure realized by source laser device, and optical power detector realizes the measurement of optical cable luminous power, monofocal sagnac
The optical cable identifier interfered realizes the identification of fault optical cable, and 31 × 2 matrix optical switch realize fiber failure positioning, visual HONGGUANG
Flexible switching between positioning, measuring light power, the function of fault optical cable identification.
With reference to Fig. 3, the integrative optical cable fault detection device of the present invention is described in detail.
The first input end p1 of the first photoswitch 100 is connected to the output end p 0 of the second photoswitch 200, its second input
P10 is connected to the output end p 0 of the 3rd photoswitch 300, and its output end p 0 is connected to tested optical fiber；The first of second photoswitch 200
Input p1 is connected to the outfan of red light source laser instrument 40, and its second input p10 is connected to monofocal sagnac interference
The fifth port 5 of 3 × 3 bonders 11 of optical cable identifier, its outfan is connected to the first input end of the first photoswitch 100
p1；The first input end of the 3rd photoswitch 300 is connected to the first outfan 22 of the optical fiber circulator 27 of optical time domain reflectometer, its
First output end p 0 is connected to the second input p10 of the first photoswitch 100, and its second output end p 10 is connected to luminous power and visits
Survey the input of device 50；The first input end p1 of the 4th photoswitch 400 is connected to the second outfan 23 of fiber optical circulator 27, its
Second input p10 is connected to the 3rd port 3 of 3 × 3 bonders 11, and its output end p 0 is connected to the input of photodetector 30
End.
Realize fiber failure positioning, visual HONGGUANG positioning, luminous power survey using tetra- control signal wires of d1, d2, d3, d4
Flexible switching between amount, fault optical cable identification function, the first input end of the wherein first holding wire d1 and the first photoswitch 100
P1, the first input end p1 of the second photoswitch 200 are connected；Secondary signal line d2 and the second input of the second photoswitch 200
P10, the second input p10 of the 4th photoswitch 400 are connected；3rd holding wire d3 and the first input of the 3rd photoswitch 300
End p1, the 4th photoswitch 400 first input end p1 are connected；4th holding wire d4 and the second input of the first photoswitch 100
P10, the second output end p 10 of the 3rd photoswitch 300 are connected.Represented using signal 1 and enable signal, signal 0 represents closes letter
Number, fiber failure positioning, visual HONGGUANG positioning, measuring light power, fault optical cable identification function control sequential as follows:
Red light source visual fault positions: d1d2d3d4=1000, and that is, the first holding wire d1 is by the first of the first photoswitch 100
The first input end p1 of input p1 and the second photoswitch 200 enables, and the output signal of red light source laser instrument 40 is transferred to tested
Optical fiber.
Fault optical cable identify: be first set to: d1d2d3d4=1000, after be set to: d1d2d3d4=0100, will 3 × 3 couplings
The fifth port 5 of clutch is connected with tested optical fiber, and the 3rd port 3 of 3 × 3 bonders is connected with photodetector 30
Connect.
Light power meter measures function: d1d2d3d4=0001, and that is, the 4th holding wire d4 is defeated by the second of the first photoswitch 100
Enter to hold p10 and the second input p10 of the 3rd photoswitch 200 to enable, the outfan of optical power detector 50 is connected to by light-metering
Fine.
Fiber failure position: be first set to: d1d2d3d4=0001, after be set to: d1d2d3d4=0010, will fiber optic loop
First outfan 22 of row device 27 is connected to optical power detector 50, by the first outfan 22 of fiber optical circulator 27 be connected to by
Light-metering is fine, and the second outfan 23 of fiber optical circulator 27 is connected to photodetector 30.
It is the square that the first photoswitch 100, the second photoswitch 200 and the 3rd photoswitch 300 cascade by 31 × 2 photoswitches
Battle array switch realizes fiber failure positioning, multi-functional, the integrated collection of visual HONGGUANG positioning, measuring light power, fault optical cable identification
Become, the 4th photoswitch 400 realizes the multiplexing of photodetector 30, so that multi-functional, integrative optical cable fault detection device
Structure compacter.Using four holding wires d1, d2, d3, d4, matrix switch is controlled, realize fiber failure positioning,
Visual HONGGUANG positioning, measuring light power, the switching of fault optical cable identification function.
Preferably, red light source laser instrument 40 is 650nm red light source laser instrument.
Preferably, optical power detector 50 is pin near infrared photodetector.
The integrative optical cable fault detection device collection optical time domain reflectometer Cable's Fault positioning function of the present invention, red light source can
Depending on fault location function, light power meter measurement function and optical cable identification function in one, portable, Highgrade integration, and
It is the Cable's Fault detection means of single port output, being capable of quick diagnosis Cable's Fault.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (3)
1. a kind of integrative optical cable fault detection device is it is characterised in that include: optical time domain reflectometer, red light source laser instrument, light
Power detector and the optical cable identifier of monofocal sagnac interference, also include opening for 31 × 2 matrix light of function switching
Pass, a multiplexing photoswitch and four are used for controlling the holding wires of described 4 photoswitches；
The optical cable identifier that monofocal sagnac interferes includes optical cable identification laser instrument, photodetector, 3 × 3 bonders and light
Fiber isolator；
Optical time domain reflectometer includes optical cable and seeks barrier laser instrument, wavelength division multiplexer, fiber optical circulator and photodetector；
The first input end of the first photoswitch is connected to the outfan of the second photoswitch, and its second input is connected to the 3rd light and opens
The outfan closing, its outfan is connected to tested optical fiber；
The first input end of the second photoswitch is connected to the outfan of red light source laser instrument, and its second input is connected to monofocal
The fifth port of 3 × 3 bonders of sagnac optical interference circuit, its outfan is connected to the first input end of the first photoswitch；
The first input end of the 3rd photoswitch is connected to the first outfan of the optical fiber circulator of optical time domain reflectometer, and it is first defeated
Go out the second input that end is connected to the first photoswitch, its second outfan is connected to the input of optical power detector；
The first input end of the 4th photoswitch is connected to the second outfan of fiber optical circulator, and its second input is connected to 3 × 3
3rd port of bonder, its outfan is connected to the input of photodetector；
Wherein first holding wire d1 is connected with the first input end of the first photoswitch, the first input end of the second photoswitch；The
Binary signal line d2 is connected with the second input of the second photoswitch, the second input of the 4th photoswitch；3rd holding wire d3
It is connected with the first input end of the 3rd photoswitch, the 4th photoswitch first input end；4th holding wire d4 and the first photoswitch
The second input, the second outfan of the 3rd photoswitch is connected；
Described four holding wire d1 d2 d3 d4=1000, the output signal of red light source laser instrument is transferred to tested optical fiber；
Described four holding wire d1d2d3d4=1000, after be set to d1d2d3d4=0100, the 5th of described 3 × 3 bonders the
Port is connected with tested optical fiber, and the 3rd port of 3 × 3 bonders is connected with photodetector；
Described four holding wire d1d2d3d4=0001, described optical power detector outfan is connected to tested optical fiber；
Described four holding wire d1d2d3d4=0001, after be set to d1d2d3d4=0010, the first output of fiber optical circulator
End is connected to optical power detector, and the first outfan of fiber optical circulator is connected to tested optical fiber, and the second of fiber optical circulator is defeated
Go out end and be connected to photodetector.
2. integrative optical cable fault detection device as claimed in claim 1 is it is characterised in that described red light source laser instrument is
650nm red light source laser instrument.
3. integrative optical cable fault detection device as claimed in claim 1 is it is characterised in that optical power detector is that pin is near
Infrared photoelectric detector.
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| CN201310470926.2A CN103532616B (en) | 2013-09-29 | 2013-09-29 | Integrative optical cable fault detection device |
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| CN201310470926.2A CN103532616B (en) | 2013-09-29 | 2013-09-29 | Integrative optical cable fault detection device |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111404A (en) * | 2014-06-16 | 2014-10-22 | 武汉康普常青软件技术股份有限公司 | Polarized light time domain reflection-based power transmission line fault detection system and positioning method |
| CN104467955A (en) * | 2014-12-24 | 2015-03-25 | 北京奥普科达科技有限公司 | High-sensitivity and high-precision optical fiber identification and calibration method and system |
| CN104601227B (en) * | 2015-01-09 | 2018-02-23 | 北京奥普维尔科技有限公司 | A kind of test instrumentation, and its method of testing |
| CN108663075A (en) * | 2016-03-25 | 2018-10-16 | 北京信息科技大学 | FBG sensing units and FBG sensor arrays |
| CN106644398B (en) * | 2016-12-30 | 2019-02-26 | 中国科学院深圳先进技术研究院 | A kind of submarine optical fiber cable fault point positioning method |
| CN107135032A (en) * | 2017-05-10 | 2017-09-05 | 合肥慧图软件有限公司 | A kind of Cable's Fault analysis system being combined based on 3S and RTU |
| CN110611532B (en) * | 2018-06-14 | 2021-03-05 | 中国移动通信集团设计院有限公司 | Optical cable joint device and system |
| CN110086529A (en) * | 2019-04-15 | 2019-08-02 | 北京盟力星科技有限公司 | A kind of detecting and analysing system based on fiber optic cable monitor station |
| CN112564781B (en) * | 2020-11-26 | 2023-04-07 | 国网四川省电力公司映秀湾水力发电总厂 | Optical fiber grating line tracker |
| CN113375903B (en) * | 2021-05-14 | 2022-10-11 | 太原理工大学 | Optical fiber breakpoint positioning device |
| 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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| US7469102B2 (en) * | 2002-10-07 | 2008-12-23 | Novera Optics, Inc. | Wavelength-division-multiplexing passive optical network utilizing fiber fault detectors and/or wavelength tracking components |
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| CN2450828Y (en) * | 2000-07-12 | 2001-09-26 | 信息产业部武汉邮电科学研究院 | Optical cable real time monitoring device |
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| CN101487723A (en) * | 2009-03-02 | 2009-07-22 | 北京航空航天大学 | Optical fiber distributed perturbation sensor based on Sagnac interferometer |
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Effective date of registration: 20190314 Address after: 266000 No. 98 Xiangjiang Road, Huangdao District, Qingdao City, Shandong Province Patentee after: China Electronics Technology Instrument and Meter Co., Ltd. Address before: 266555 No. 98 Xiangjiang Road, Qingdao economic and Technological Development Zone, Shandong Patentee before: The 41st Institute of CETC |
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