CN113049225A - Fault positioning device of optical cable equipment - Google Patents
Fault positioning device of optical cable equipment Download PDFInfo
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- CN113049225A CN113049225A CN202110265972.3A CN202110265972A CN113049225A CN 113049225 A CN113049225 A CN 113049225A CN 202110265972 A CN202110265972 A CN 202110265972A CN 113049225 A CN113049225 A CN 113049225A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 69
- 238000012544 monitoring process Methods 0.000 claims abstract description 33
- 238000004891 communication Methods 0.000 claims abstract description 18
- 239000013307 optical fiber Substances 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000000253 optical time-domain reflectometry Methods 0.000 claims abstract description 10
- 230000003321 amplification Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 9
- 239000000835 fiber Substances 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
- G01M11/3127—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR using multiple or wavelength variable input source
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
- G01M11/3154—Details of the opto-mechanical connection, e.g. connector or repeater
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a fault positioning device of optical cable equipment, which comprises an OTDR monitoring system and a power grid GIS, wherein the OTDR monitoring system comprises a processor and a wavelength division multiplexer, the output end of the processor is respectively and electrically connected with the input ends of a pulse driving circuit, a graphic display module and a communication module, the output end of the pulse driving circuit is electrically connected with the input end of a pulse laser, the output end of the pulse laser is electrically connected with the input end of a directional coupler, the output end of the directional coupler is respectively and electrically connected with a photoelectric detection circuit and the input end of a flange, the flange is electrically connected with an optical fiber, the output end of the photoelectric detection circuit is electrically connected with the input end of a signal amplifier, the output end of the signal amplification circuit is electrically connected with the input end of an A/D conversion circuit, and the output end of the A/D conversion, the fault occurrence point of the optical cable is accurately positioned, and the fault positioning and removing efficiency of the optical cable is improved.
Description
Technical Field
The invention relates to the field of optical communication networks, in particular to a fault positioning device of optical cable equipment.
Background
The optical communication network is the most important communication network in the current power industry and is responsible for the construction of high-speed and long-distance backbone communication. With the continuous expansion of the optical network scale, the transmission structure of the network becomes more and more complex, and the maintenance of the optical cable and the monitoring of the optical cable state become more and more important and more complex. The optical cable constructed in the early period has a certain age limit and various hidden dangers, various crises exist at any time, and the problem is fully explained by the annual increase of the fault frequency of the optical cable line. The industry has concluded in recent years that failure analysis of hundreds of transmission networks worldwide: the line fault of optical cable communication is more prominent than equipment fault, and in all transmission accidents, more than half of the transmission medium faults mainly based on the optical cable cause the fault time to account for more than 90% of unavailable time, and the economic loss caused by the communication optical cable faults is huge every year.
With the comprehensive construction of the smart power grid, the production and operation services of the power grid are increasing day by day, the service bearing conditions of a single set of equipment and a single optical cable are becoming concentrated day by day, and the system operation risk possibly caused by the fault of the single equipment and the single optical cable is increased. In the traditional optical cable line maintenance management mode of optical cable detection based on instruments such as OTDR (optical time domain reflectometer), monitoring equipment consists of a plurality of parts, the reliability is not high, the response speed to faults is determined by people, and the fault finding is very difficult; the fault removing time is long, the fault locating capability is poor, hidden dangers cannot be predicted, and the normal work of a communication network is influenced. The monitoring of the optical transmission equipment mainly depends on a professional network management system provided by each equipment manufacturer, and the optical transmission equipment is poor in universality and difficult to be compatible with equipment of manufacturers. The efficiency of on-site detection of faults such as optical cable breakpoints is low, the current normal transmission service needs to be interrupted, long-term and real-time monitoring is difficult to realize, long-term change statistics of optical cable parameters cannot be mastered, emergency repair after the faults can only be realized, and advance early warning cannot be realized.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the fault positioning device of the optical cable equipment, which can accurately position the fault occurrence point of the optical cable and improve the fault positioning and removing efficiency of the optical cable.
In order to solve the technical problems, the invention provides the following technical scheme: a fault positioning device of optical cable equipment comprises an OTDR monitoring system and a power grid GIS, wherein the OTDR monitoring system comprises a processor and a wavelength division multiplexer, the output end of the processor is respectively and electrically connected with the input ends of a pulse driving circuit, a graphic display module and a communication module, the output end of the pulse driving circuit is electrically connected with the input end of a pulse laser, the output end of the pulse laser is electrically connected with the input end of a directional coupler, the output end of the directional coupler is respectively and electrically connected with a photoelectric detection circuit and the input end of a flange, the flange is electrically connected with an optical fiber, the output end of the photoelectric detection circuit is electrically connected with the input end of a signal amplifier, the output end of a signal amplification circuit is electrically connected with the input end of an A/D conversion circuit, and the output end of the A/D conversion circuit;
the input end of the wavelength division multiplexer is electrically connected with the output ends of the 1310nm pulse laser, the 1550nm pulse laser and the 1625nm pulse laser respectively, the output end of the wavelength division multiplexer is electrically connected with the input end of the circulator, and the output end of the circulator is electrically connected with the optical interface and the input end of the APD detector respectively.
As a preferred technical solution of the present invention, the measurement range of the OTDR monitoring system is also the dynamic range of the OTDR.
As a preferred embodiment of the present invention, the power of the optical pulse emitted by the optical source of the OTDR monitoring system may generally be an average power and a peak power.
As a preferred technical solution of the present invention, the OTDR monitoring system selects a wavelength resource in a 1625nm band.
As a preferred technical solution of the present invention, the OTDR monitoring system performs status monitoring by using an advanced analysis method with respect to historical data.
Compared with the prior art, the invention can achieve the following beneficial effects:
1. the multi-channel OTDR real-time on-line monitoring technology is adopted to realize the whole-line real-time monitoring of the power optical cable and the diagnosis and early warning of the fault optical cable; the method aims at the problems that the judgment of the geographical spatial position of a power communication optical cable fault point is difficult and the first-aid repair time is influenced;
2. through the optical cable fault location technology applied to the power grid GIS, the optical cable fault occurrence point is accurately located, so that the optical cable fault location and removal efficiency is improved, the operation maintenance and repair efficiency of the power grid optical cable fault is improved, and the reliability of the power optical fiber communication network is improved.
Drawings
FIG. 1 is a block diagram of the OTDR testing principle of the present invention;
FIG. 2 illustrates the detection principle of the OTDR monitoring system of the present invention;
FIG. 3 is a block diagram of an OTDR submodule of the present invention;
fig. 4 is a diagram of an optical path structure of an OTDR sub-module of the present invention.
Detailed Description
The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example (b):
as shown in fig. 1-4, the present invention provides a fault location device for optical cable equipment, which comprises an OTDR monitoring system and a power grid GIS, the OTDR monitoring system comprises a processor and a wavelength division multiplexer, wherein the output end of the processor is respectively and electrically connected with the input ends of the pulse driving circuit, the graph display module and the communication module, the output end of the pulse driving circuit is electrically connected with the input end of the pulse laser, the output end of the pulse laser is electrically connected with the input end of the directional coupler, the output end of the directional coupler is respectively electrically connected with the photoelectric detection circuit and the input end of the flange, the flange is electrically connected with the optical fiber, the output end of the photoelectric detection circuit is electrically connected with the input end of the signal amplifier, the output end of the signal amplification circuit is electrically connected with the input end of the A/D conversion circuit, and the output end of the A/D conversion circuit is electrically connected with the input end of the processor;
the input end of the wavelength division multiplexer is electrically connected with the output ends of the 1310nm pulse laser, the 1550nm pulse laser and the 1625nm pulse laser respectively, the output end of the wavelength division multiplexer is electrically connected with the input end of the circulator, and the output end of the circulator is electrically connected with the optical interface and the input end of the APD detector respectively.
As shown in fig. 1, the pulse laser converts an electric pulse signal with a period T generated by a detection signal generator in the pulse driving circuit into an optical pulse signal meeting requirements, and sends the optical pulse signal to a tested optical fiber through the directional coupler. After a period of time, a portion of the optical signal is reflected back to the instrument, where it includes the backscattered light and fresnel reflected light from the fiber connector, fiber stub, and fiber termination, and is returned to the receiver through the directional coupler. The photoelectric detection circuit continuously records the reverse light signal related to time, and displays a curve of the relationship between the information of the reverse light and the distance on a graphic display, and the data such as the length of the measured optical fiber, the positions of the connector and the joint, the loss and the attenuation of the joint and the like can be determined according to the curve;
as shown in fig. 2 and 3, the processor receives the control command through the ethernet interface, tests the optical fiber cable, the laser injects an optical pulse signal with a corresponding wavelength into the optical fiber, the signal scattered and refracted by the optical fiber enters the receiving modules such as the directional coupler to perform photoelectric conversion and signal conditioning, then enters the a/D conversion circuit to perform analog-to-digital conversion, and is read, operated, analyzed and processed by the processor;
as shown in fig. 4, the 1310nm pulse laser and the 1550nm pulse laser work in a fiber backup mode or an off-line mode, the 1625nm pulse laser can work in a fiber backup, off-line and on-line modes, any 1-3 wavelengths of the above wavelengths are selected as the working wavelength of the monitoring system according to the requirement, and other wavelengths, such as 1490nm or 1650nm, can also be used or expanded. If only one wavelength is needed, the wavelength division multiplexer can be removed, and the insertion loss can be reduced and the input and output signals can be isolated by using a circulator in the OTDR module, so that the OTDR dynamic is improved, and the influence of strong reflected light on a laser is avoided;
when the open circuit occurs, the attenuation of the optical signal is increased sharply at the open circuit, so that the distance from the open circuit point of the optical cable to the computer room can be accurately obtained by using an OTDR (optical time domain reflectometer) through the attenuation of the optical signal, and corresponding records are searched in a communication line attribute table through the distance by using a 'distance from a central computer room' field in the table. So that the recorded bar number is displayed in the map
The multi-channel OTDR real-time on-line monitoring technology is adopted to construct a multi-channel OTDR real-time monitoring prototype, so that the whole-line real-time monitoring of the power optical cable and the diagnosis and early warning of the fault optical cable are realized; aiming at the problems that the geographic spatial position of a power communication optical cable fault point is difficult to judge and the emergency repair time is influenced, the optical cable fault occurrence point is accurately positioned based on the optical cable fault positioning technology applied by the power grid GIS, so that the optical cable fault positioning and removing efficiency is improved, the operation and maintenance efficiency of the power grid optical cable fault is further improved, and the reliability of a power optical fiber communication network is improved.
In other embodiments, the measurement range of the OTDR monitoring system is also the dynamic range of the OTDR.
The dB difference between the back scattering level and the noise at the starting end, the measurement range is an important index of the OTDR, the measurement range determines the capability of the instrument for measuring the long distance, the size of the measurement range depends on factors such as the optical pulse power, the width, the wavelength and the noise of a receiver, and the like of the instrument, the dynamic range is small, the loss value resolution rate begins to deteriorate at a short distance, and the resolution capability of events such as joint loss is reduced.
In other embodiments, the power of the light pulses emitted by the light source of the OTDR monitoring system may generally be an average power and a peak power.
At the same peak value, the larger the pulse width or duty cycle, the larger the average optical power, and conversely, the smaller the average optical power. In the maintenance test, the average optical power is measured as soon as the optical power is measured, and the measured value is generally small. When the OTDR is used for testing the transmission characteristics of an optical fiber line, only the average power is generally concerned. When the attenuation of the measured optical fiber line is constant, the larger the average power is, the larger the measurement range is correspondingly.
In other embodiments, the OTDR monitoring system selects a wavelength resource in 1625nm band.
The transmission loss of the light in the 1625nm band in the optical fiber is larger, the main problem of obtaining high-performance OTDR focuses on how to generate a high-power light source in the 1625nm band, and as the relay distance of the optical fiber communication system is continuously increased, only the dynamic range of the OTDR is increased, the requirement of the single-mode optical fiber communication system which is gradually developed can be met. Meanwhile, with the development of fiber area networks and distributed fiber sensors, OTDRs are required to have extremely high resolution and to be able to penetrate through multi-level light spots for fault detection and diagnosis.
In other embodiments, the OTDR monitoring system performs state monitoring by using an advanced analysis method for historical data, thereby implementing a function of early warning potential fault hidden danger of the optical cable and preventing the potential fault hidden danger.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a fault location device of optical cable equipment, includes OTDR monitoring system and electric wire netting GIS, its characterized in that: the OTDR monitoring system comprises a processor and a wavelength division multiplexer, wherein the output end of the processor is respectively electrically connected with the input ends of a pulse drive circuit, a graphic display module and a communication module, the output end of the pulse drive circuit is electrically connected with the input end of a pulse laser, the output end of the pulse laser is electrically connected with the input end of a directional coupler, the output end of the directional coupler is respectively electrically connected with a photoelectric detection circuit and the input end of a flange, the flange is electrically connected with an optical fiber, the output end of the photoelectric detection circuit is electrically connected with the input end of a signal amplifier, the output end of the signal amplification circuit is electrically connected with the input end of an A/D conversion circuit, and the output end of the A/D conversion circuit is electrically connected with;
the input end of the wavelength division multiplexer is electrically connected with the output ends of the 1310nm pulse laser, the 1550nm pulse laser and the 1625nm pulse laser respectively, the output end of the wavelength division multiplexer is electrically connected with the input end of the circulator, and the output end of the circulator is electrically connected with the optical interface and the input end of the APD detector respectively.
2. A fault locating device of an optical cable apparatus as claimed in claim 1, wherein: the measurement range of the OTDR monitoring system is also the dynamic range of the OTDR.
3. A fault locating device of an optical cable apparatus as claimed in claim 1, wherein: the power of the light pulses emitted by the light source of the OTDR monitoring system may generally be an average power and a peak power.
4. A fault locating device of an optical cable apparatus as claimed in claim 1, wherein: and the OTDR monitoring system selects a wavelength resource in a 1625nm band.
5. A fault locating device of an optical cable apparatus as claimed in claim 1, wherein: the OTDR monitoring system adopts an advanced analysis method to monitor the state of historical data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110265972.3A CN113049225A (en) | 2021-03-11 | 2021-03-11 | Fault positioning device of optical cable equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110265972.3A CN113049225A (en) | 2021-03-11 | 2021-03-11 | Fault positioning device of optical cable equipment |
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| CN113049225A true CN113049225A (en) | 2021-06-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217313A (en) * | 2008-01-11 | 2008-07-09 | 北京邮电大学 | A fault diagnosis method applied OTDR passive optical network optical fiber |
| CN101630972A (en) * | 2009-08-19 | 2010-01-20 | 烽火通信科技股份有限公司 | Optical fiber line intelligent detection system and optical fiber line intelligent detection method for wavelength division multiplex (WDM) network |
| CN102291176A (en) * | 2011-08-30 | 2011-12-21 | 上海波汇通信科技有限公司 | Fault on-line monitoring system of passive optical network |
| CN106788696A (en) * | 2017-01-20 | 2017-05-31 | 山西恒海创盈科技有限公司 | The monitoring of optical cable on-line intelligence and fault location system based on GIS platform |
| CN206524837U (en) * | 2017-01-11 | 2017-09-26 | 山西恒海创盈科技有限公司 | Multi-path OTDR electric power optical cable real time on-line monitoring devices |
| CN209342918U (en) * | 2018-12-10 | 2019-09-03 | 国网江西省电力有限公司上饶供电分公司 | One kind being based on power grid GIS Cable's Fault positioning device |
| CN209435224U (en) * | 2018-12-10 | 2019-09-24 | 国网江西省电力有限公司上饶供电分公司 | A kind of electric power optical cable multi-path OTDR real time on-line monitoring device |
-
2021
- 2021-03-11 CN CN202110265972.3A patent/CN113049225A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217313A (en) * | 2008-01-11 | 2008-07-09 | 北京邮电大学 | A fault diagnosis method applied OTDR passive optical network optical fiber |
| CN101630972A (en) * | 2009-08-19 | 2010-01-20 | 烽火通信科技股份有限公司 | Optical fiber line intelligent detection system and optical fiber line intelligent detection method for wavelength division multiplex (WDM) network |
| CN102291176A (en) * | 2011-08-30 | 2011-12-21 | 上海波汇通信科技有限公司 | Fault on-line monitoring system of passive optical network |
| CN206524837U (en) * | 2017-01-11 | 2017-09-26 | 山西恒海创盈科技有限公司 | Multi-path OTDR electric power optical cable real time on-line monitoring devices |
| CN106788696A (en) * | 2017-01-20 | 2017-05-31 | 山西恒海创盈科技有限公司 | The monitoring of optical cable on-line intelligence and fault location system based on GIS platform |
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| CN209435224U (en) * | 2018-12-10 | 2019-09-24 | 国网江西省电力有限公司上饶供电分公司 | A kind of electric power optical cable multi-path OTDR real time on-line monitoring device |
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