CN106612145A - Method for rapidly finding and precisely positioning ground position of fault point of communication optical cable - Google Patents
Method for rapidly finding and precisely positioning ground position of fault point of communication optical cable Download PDFInfo
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- CN106612145A CN106612145A CN201510703723.2A CN201510703723A CN106612145A CN 106612145 A CN106612145 A CN 106612145A CN 201510703723 A CN201510703723 A CN 201510703723A CN 106612145 A CN106612145 A CN 106612145A
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Abstract
The invention discloses a method for rapidly finding and precisely positioning a ground position of a fault point of a communication optical cable. The method comprises the steps of emitting a continuous light source towards a pulse modulator by a broadband optical source to realize pulse modulation of optical signals, carrying out power amplification on pulse laser through an amplification module and then enabling the pulse laser after being subjected to the power amplification to enter a measuring optical fiber through a circulator; forming light intensity change in which Rayleigh lights are scattered backwards when the pulse laser encounters the fault point of the optical fiber in the measuring optical fiber; carrying out repeated measurement on multiple pulses and carrying out a noise reduction algorithm to obtain an optical power curve of fiber loss characteristic champion; and etc. The method for rapidly finding and precisely positioning the ground position of the fault point of the communication optical fiber can find the fault point of the optical fiber accurately without digging the ground; and the finding efficiency is high, and the positioning error is low.
Description
Technical field
Patent of the present invention is related to detection technique field, more particularly to a kind of communications optical cable trouble point
Ground location is quickly searched and pinpoint method.
Background technology
At present, in the positioning and search procedure of fault points of optical cables, enter frequently with OTDR instrument
Row abort situation is measured.
OTDR also known as optical time domain reflection technology, the technology by measure fibre optical transmission light pulse,
The Rayleigh scattering and and Fresnel of trouble point initiation are run into when propagating in a fiber using light pulse
Reflex, realizes the detection to optical fiber attenuation and breakpoint, and according to pulse launch time to inspection
Measuring the time that anomalous scattering or reflected light signal consumed realizes attenuation points in optical fiber, breakpoint bit
The range measurement put.The OTDR systems are requisite in optical cable construction, maintenance and monitoring
Instrument.
But due to the length that the numerical value that OTDR instrument is given is optical fibre in optical cable, however, optical fiber
Length be not the length for being equal to Optical Cable actual ground, reason is as follows：First, due to
Optical fiber has certain bending, therefore the length of optical fiber more than optical cable in the protection modeling pipe in optical cable
Length, second, during optical cable construction, optical cable random bend in ditch, therefore the length of optical cable
More than the length of optical cable ditch, third, optical cable is in construction, fiber cable joint position often has degree
The disk of certain length is stayed.Therefore OTDR instrument is given optical path length (the namely reality of optical fiber
Border length) numerical value buries the actual ground length of route more than optical cable, for fiber optic cable maintenance
For personnel, by the length of OTDR instrument measurements fiber failure point, it is impossible to accurately true
Determine the corresponding ground physical location of fault points of optical cables, and further trouble point ground location is searched,
One ground location of fiber lengths Numerical value be given according to OTDR instrument is accomplished by, is estimated
Error is general all at tens meters to hundreds of rice, that is to say, that want to dig out fault points of optical cables, needs
Tens meters to hundreds of meter of ground ditch is excavated, this lookup method is great in constructing amount, and in a large number
Destruction ground vegetation and crops, cause substantial amounts of construction to compensate, and construction cost is high, construction week
Phase length (time for finding a trouble point is usually more than ten hour, several days to tens days),
Rectification efficiency is very low, has a strong impact on fiber optic cable communications network communication quality.
Coherent light vibration detection technology is a kind of vibration detection technology based on the interference of light, the technology
The scattering occurred in a fiber using super-narrow line width laser pulse produces what is interfered to vibration sensing
Phenomenon, it is possible to achieve the distributed sensing of the vibration environment along the line to optical fiber, it is anti-by optical time domain
The technology of penetrating realizes the positioning of vibration event.Can be attached to optical cable using coherent light vibration detection technology
Near vibration signal is accurately detected and positioned, especially for buried cable, by light
Cable ditch earth's surface applies artificial vibration, and current point is gone out to the location estimation of vibration event according to system
Cable length.But coherent rayleigh vibration detection technology can not detect static state fault points of optical cables or
Breakpoint, therefore cannot be used for lookup and the positioning of fault points of optical cables.
Cable's Fault position is applied to for existing coherent light vibration detection technology and tradition OTDR
The problem that detection runs into, by existing coherent light vibration detection technology system and tradition
On the basis of OTDR systems are transformed, it is possible to achieve to ground surface vibration, fault points of optical cables position
Detect while putting, the inventive method provides a kind of fault points of optical cables position of being accurately positioned
Criterion and algorithm, provide the ground exact position of trouble point, realize the non-of communications optical cable trouble point
Digging mode lookup rapidly and efficiently.
The content of the invention
Criterion and algorithm in order to be accurately positioned fault points of optical cables position of the invention, provides event
The ground exact position of barrier point, realizes the no-dig technique mode of communications optical cable trouble point rapidly and efficiently
Search.
Specifically adopt following method：
Wide spectrum light source sends the impulse modulation that continuous light source realizes optical signal into pulse-modulator,
The amplified module of pulse laser completes to enter measurement optical fiber through circulator after power amplification.
In measurement optical fiber, pulse laser runs into fault points of optical cables and forms back scattering Reyleith scanttering light
Light intensity changes, and multiple pulse repeated measure simultaneously obtain a fibre loss spy after noise reduction algorithm
Levy the luminous power curve of UEFA Champions League.
Super-narrow line width light source sends the pulse that continuous light source realizes optical signal into pulse-modulator
Modulation, the amplified module of pulse laser completes to enter measurement optical fiber through circulator after power amplification；
In the measurement optical fiber, parts different on a super-narrow line width pulse laser inner space occur
Scattering interfere phenomenon when reaching photoelectric conversion device simultaneously, formation can reflect optical cable edge
The light intensity curve of the back scattering Reyleith scanttering light of linearly coupled situation, by carrying out to the curve point
Analysis can obtain optical cable vibration signal intensity map along the line, accurately provide the location point that vibration occurs.
Measurement pulse sends the time and detects the time difference of light intensity change, by optical fibre refractivity
The light velocity value in optical fiber is obtained, binding time difference and light velocity value accurately obtain the light of fault points of optical cables
Road length value
Optical cable vibration signal intensity map along the line is relevant with the fibre loss feature for recording before this
Luminous power curve is positioned in the same coordinate system and is compared, according to the Cable's Fault for having calculated measure
There is the phase mutual deviation between position with current vibration event in point, while instructing vibration-testing personnel
Approach and locating optical cable trouble point, so as to the trouble point for finally accurately finding optical cable.
Preferably, the wide spectrum light source sends continuous light source, and through photoswitch impulse modulation is entered
Device realizes the impulse modulation of optical signal, and then, the super-narrow line width light source sends continuous light source,
The impulse modulation of optical signal is similarly realized into pulse-modulator through photoswitch.
The beneficial effects of the present invention is：By using different light sources, Cable's Fault is completed
While point optical path distance is tested, can realize shaking by way of in the artificial vibration of ground manufacture
Gradually approaching for dynamic position and abort situation, especially for buried cable, opens ground is not carried out
The lookup of fault points of optical cables can be fast and accurately realized in the case of digging, search efficiency is high, fixed
Position error is little.
Description of the drawings
Fig. 1 be a kind of communications optical cable trouble point ground location of the embodiment of the present invention quickly search and
The flow chart of pinpoint method；
Fig. 2 be a kind of communications optical cable trouble point ground location of the embodiment of the present invention quickly search and
The light path trouble point power fade of pinpoint method and vibration event signal comparison schematic diagram.
Specific embodiment
The technology of the present invention is further illustrated below in conjunction with the accompanying drawings and by specific embodiment
Scheme.
From Fig. 1 and Fig. 2, it is known that
Wide spectrum light source sends continuous light source, and optical signal is realized into pulse-modulator through photoswitch
Impulse modulation.The amplified module of pulse laser is completed to be entered through circulator after power amplification and surveyed
Amount optical fiber.
In measurement optical fiber, pulse laser runs into fault points of optical cables and forms back scattering Reyleith scanttering light
Light intensity changes, and multiple pulse repeated measure simultaneously obtain a fibre loss spy after noise reduction algorithm
Levy the luminous power curve of UEFA Champions League.See the A curves of Fig. 2.
Super-narrow line width light source sends continuous light source, and light is realized into pulse-modulator through photoswitch
The impulse modulation of signal, the amplified module of pulse laser completes to enter through circulator after power amplification
Enter to measure optical fiber.
In the measurement optical fiber, on a super-narrow line width pulse laser inner space different parts
The scattering of generation interferes phenomenon when reaching photoelectric conversion device simultaneously, and formation can reflect light
The light intensity curve of the back scattering Reyleith scanttering light of cable Vibration Condition along the line.See the B curves of Fig. 2.
Optical cable vibration signal intensity map along the line can be obtained by being analyzed to the curve, is accurately given
The location point that vibration occurs.In seeing Fig. 2.
Measurement pulse sends the time and detects the time difference of light intensity change, by optical fibre refractivity
The light velocity value in optical fiber is obtained, binding time difference and light velocity value accurately obtain the light of fault points of optical cables
Road length value.
Optical cable vibration signal intensity map along the line is relevant with the fibre loss feature for recording before this
Luminous power curve is positioned in the same coordinate system and is compared, according to the Cable's Fault for having calculated measure
There is the phase mutual deviation between position with current vibration event in point, while instructing vibration-testing personnel
Approach and locating optical cable trouble point, so as to the trouble point for finally accurately finding optical cable.See Fig. 2,
Become the trouble point for determining optical cable when Ckm and Dkm overlaps.
The above, preferably specific embodiment only of the invention, but protection scope of the present invention is simultaneously
Be not limited to this, it is any be familiar with the people of the technology disclosed herein technical scope in, can
The change or replacement for readily occurring in, all should be included within the scope of the present invention.Therefore,
Protection scope of the present invention should be defined by scope of the claims.
Claims (2)
1. a kind of communications optical cable trouble point ground location is quickly searched and pinpoint method,
It is characterized in that, including：
Wide spectrum light source sends the impulse modulation that continuous light source realizes optical signal into pulse-modulator,
The amplified module of pulse laser completes to enter measurement optical fiber through circulator after power amplification；
In measurement optical fiber, pulse laser runs into fault points of optical cables and forms back scattering Reyleith scanttering light
Light intensity changes, and multiple pulse repeated measure simultaneously obtain a fibre loss spy after noise reduction algorithm
Levy the luminous power curve of UEFA Champions League；
Super-narrow line width light source sends the pulse that continuous light source realizes optical signal into pulse-modulator
Modulation, the amplified module of pulse laser completes to enter measurement optical fiber through circulator after power amplification；
In the measurement optical fiber, parts different on a super-narrow line width pulse laser inner space occur
Scattering interfere phenomenon when reaching photoelectric conversion device simultaneously, formation can reflect optical cable edge
The light intensity curve of the back scattering Reyleith scanttering light of linearly coupled situation, by carrying out to the curve point
Analysis can obtain optical cable vibration signal intensity map along the line, accurately provide the location point that vibration occurs；
Measurement pulse sends the time and detects the time difference of light intensity change, by optical fibre refractivity
The light velocity value in optical fiber is obtained, binding time difference and light velocity value accurately obtain the light of fault points of optical cables
Road length value；
Optical cable vibration signal intensity map along the line is relevant with the fibre loss feature for recording before this
Luminous power curve is positioned in the same coordinate system and is compared, according to the Cable's Fault for having calculated measure
There is the phase mutual deviation between position with current vibration event in point, while instructing vibration-testing personnel
Approach and locating optical cable trouble point, so as to the trouble point for finally accurately finding optical cable.
2. a kind of communications optical cable trouble point as claimed in claim 1 ground location is quickly searched
With pinpoint method, it is characterised in that the wide spectrum light source sends continuous light source, pass through
Photoswitch realizes the impulse modulation of optical signal into pulse-modulator, then, the ultra-narrow line
Wide light source sends continuous light source, similarly realizes optical signal into pulse-modulator through photoswitch
Impulse modulation.
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| CN201510703723.2A CN106612145A (en) | 2015-10-26 | 2015-10-26 | Method for rapidly finding and precisely positioning ground position of fault point of communication optical cable |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387889A (en) * | 2018-04-04 | 2018-08-10 | 广东电网有限责任公司 | A kind of ground determines the device of power cable fore-and-aft distance |
| CN110011728A (en) * | 2019-05-24 | 2019-07-12 | 昆仑杰信（北京）科技有限责任公司 | Buried cable fault locating system of the breaking point detection in conjunction with vibration detection |
| CN113405596A (en) * | 2021-06-01 | 2021-09-17 | 中国南方电网有限责任公司超高压输电公司广州局 | Monitoring method and device of submarine cable monitoring system |
| RU2761591C1 (en) * | 2021-05-24 | 2021-12-10 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Поволжский государственный университет телекоммуникаций и информатики" | Optical cable routing search method |
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| US20070041020A1 (en) * | 2005-08-17 | 2007-02-22 | Hall David B | Method and apparatus for direct detection of signals from a differential delay heterodyne interferometric system |
| CN102226703A (en) * | 2011-03-29 | 2011-10-26 | 宁波诺驰光电科技发展有限公司 | Distributed fiber multi-parameter sensor and multi-parameter measuring method |
| CN103051377A (en) * | 2012-12-26 | 2013-04-17 | 桂林聚联科技有限公司 | Method for precisely positioning fault of optical cable by utilizing rayleigh scattering and coherent optical time domain reflection technology |
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2015
- 2015-10-26 CN CN201510703723.2A patent/CN106612145A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070041020A1 (en) * | 2005-08-17 | 2007-02-22 | Hall David B | Method and apparatus for direct detection of signals from a differential delay heterodyne interferometric system |
| CN102226703A (en) * | 2011-03-29 | 2011-10-26 | 宁波诺驰光电科技发展有限公司 | Distributed fiber multi-parameter sensor and multi-parameter measuring method |
| CN103051377A (en) * | 2012-12-26 | 2013-04-17 | 桂林聚联科技有限公司 | Method for precisely positioning fault of optical cable by utilizing rayleigh scattering and coherent optical time domain reflection technology |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387889A (en) * | 2018-04-04 | 2018-08-10 | 广东电网有限责任公司 | A kind of ground determines the device of power cable fore-and-aft distance |
| CN108387889B (en) * | 2018-04-04 | 2024-01-16 | 广东电网有限责任公司 | Device for determining longitudinal distance of power cable on ground |
| CN110011728A (en) * | 2019-05-24 | 2019-07-12 | 昆仑杰信（北京）科技有限责任公司 | Buried cable fault locating system of the breaking point detection in conjunction with vibration detection |
| RU2761591C1 (en) * | 2021-05-24 | 2021-12-10 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Поволжский государственный университет телекоммуникаций и информатики" | Optical cable routing search method |
| CN113405596A (en) * | 2021-06-01 | 2021-09-17 | 中国南方电网有限责任公司超高压输电公司广州局 | Monitoring method and device of submarine cable monitoring system |
| CN113405596B (en) * | 2021-06-01 | 2022-12-16 | 中国南方电网有限责任公司超高压输电公司广州局 | Monitoring method and device of submarine cable monitoring system |
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Effective date of registration: 20170519 Address after: 065700 Hebei province Langfang City Yunpeng Road Economic and Technological Development Zone Hongtai beauty hall 1 Building 3 layer tree Applicant after: Langfang Development Zone Zhongyou Xinxing Telecom Engineering Co., Ltd. Address before: 100050, Beijing, Jingtai, Dongcheng District, west east 8, building 1 to 2, 806 Applicant before: Islandworld Jinfeng (Beijing) Information Technology Co., Ltd. |
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