CN205912061U - Optical fiber fault detecting system - Google Patents
Optical fiber fault detecting system Download PDFInfo
- Publication number
- CN205912061U CN205912061U CN201620641719.8U CN201620641719U CN205912061U CN 205912061 U CN205912061 U CN 205912061U CN 201620641719 U CN201620641719 U CN 201620641719U CN 205912061 U CN205912061 U CN 205912061U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- detecting system
- fault detecting
- digital signal
- signal processor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Optical Communication System (AREA)
Abstract
The utility model discloses an optical fiber fault detecting system, including laser frequency control ware, with distribution reaction type semiconductor laser that laser frequency control ware is connected, with the fibre optic interferometer ware that distribution reaction type semiconductor laser connects and the optic fibre that awaits measuring, with fibre optic interferometer ware and the photoelectric detection system that optic fibre connects respectively of awaiting measuring, with the digital signal processor of photoelectric detection headtotail, with the overall controller that digital signal processor and laser frequency control ware are connected respectively, the utility model provides an optical fiber fault detecting system has realized the optical fiber detection of millimeter level resolution ratio kilometer level distance, the resolution ratio and the sensitivity that have improved equipment, accessible frequency domain analysis obtains by the transfer characteristic of photometry fine (or device), and then records its performance and the trouble condition, and performance detection is more reliable and more stable.
Description
Technical field
This utility model belongs to fiber failure detection technique field, is specifically related to a kind of optical fiber fault detecting system.
Background technology
With the maturation of device production process and Correlative measurement method, in recent years optical fiber measurement technology cause both domestic and external
Extensive concern, as the extremely important measurement of one kind and analysis means, it can be widely used in the fault detect of optical fiber link,
The health monitoring of the large scale component such as bridge, dam, oil pipeline, power circuit, and mine, tunnel, building etc.
Landslide early warning.
Distribution type fiber-optic e measurement technology is more widely used in various applications because of its unique characteristic, and distribution type fiber-optic is surveyed
Amount technology is that by measuring optical fiber, the echo response of pumping signal is realized with the distribution measuring of optical fiber physical parameter along the line, according to
Using technological means, optical time domain reflection technology (otdr), low-coherent light reflection technology (olcr) and probe beam deflation can be divided into
Technology (ofdr), the advantage of optical time domain reflection technology (otdr) is that technical difficulty is relatively low, and measurement distance is long, but Range resolution
Rate is limited, can only realize the distributed measurement of low range resolution ratio；Low-coherent light reflection technology (olcr) have micron-sized away from
High Resolution, but it is limited to mechanical scanning scope, measurable distance range is very limited, is not suitable for optical fiber link and big chi
The measurement of degree component；Optical frequency domain reflection technology (ofdr) as a kind of retroreflection e measurement technology based on frequency-domain analysiss, from former
Deficiency in range resolution ratio and olcr in measurement distance for the otdr is overcome on reason, achievable High Range Resolution is (tens of
Micron～millimeter magnitude), the measurement of high sensitivity and moderate distance (hundreds of meters～dozens of kilometres).
All there is measurement distance limited resolution, be not suitable for optical fiber link with regard to fiber failure detection product both at home and abroad at present
And large scale component measurement the problems such as.
It is, therefore, desirable to provide a kind of new optical fiber fault detecting system.
Content of the invention
For solving the above problems, the utility model discloses a kind of optical fiber fault detecting system, obtained by frequency-domain analysiss
Tested optical fiber (or device) transmission characteristic, and then record its performance and failure condition it is achieved that millimeter class resolution ratio kilometer
The fiber laser arrays of level distance, improve resolution and the sensitivity of equipment, and detection performance is more reliable and more stable.
In order to reach object above, this utility model provides a kind of following technical scheme: optical fiber fault detecting system, including
The distributed feedback type semiconductor laser that laser frequency controller is connected with described laser frequency controller and described distribution are anti-
Fiber optic interferometric instrument and testing fiber and described fiber optic interferometric instrument and testing fiber difference that feedback formula semiconductor laser connects
Digital signal processor and described Digital Signal Processing that the photodetector system connecting is connected with described photodetector system
The overall controller that device and laser frequency controller connect respectively.
Further, described photodetector system includes polarization diversity device, differential receiver, double balance receiver, simulation
Signal conditioner, nonlinear frequency sweeping corrector and A/D converter adc, described testing fiber is connected with described polarization diversity device,
Described polarization diversity device is connected with described pair of balance receiver, and described fiber optic interferometric instrument is connected with described differential receiver, institute
State differential receiver and double balance receiver be connected with described analog signal conditioner device, described analog signal conditioner device respectively with institute
State nonlinear frequency sweeping corrector and A/D converter adc connection, described A/D converter adc and described digital signal processor
Connect, described digital signal processor and nonlinear frequency sweeping corrector are connected with described overall controller respectively.
Further, including power management module, described power management module is connected with described overall controller.
Further, described overall controller is provided with user interface.
Further, including the malfunction coefficient lamp being connected with described overall controller.
Further, described fiber optic interferometric instrument adopts Michelson's interferometer device.
This utility model compared with the prior art, has the advantage, that
1 the utility model proposes optical fiber fault detecting system it is achieved that the optical fiber of millimeter class resolution ratio kilometer level distance
Detection, improves resolution and the sensitivity of equipment；
2nd, the transmission characteristic of tested optical fiber (or device) can be obtained by frequency-domain analysiss, and then record its performance and fault
Situation, detection performance is more reliable and more stable.
Brief description
Fig. 1 be the utility model proposes optical fiber fault detecting system structural representation.
Specific embodiment
With reference to the accompanying drawings and detailed description, it is further elucidated with this utility model it should be understood that following specific embodiment party
Formula is merely to illustrate this utility model rather than limits scope of the present utility model.
With reference to Fig. 1, a kind of optical fiber fault detecting system, including laser frequency controller and described laser frequency controller
The fiber optic interferometric instrument that is connected with described distributed feedback type semiconductor laser of distributed feedback type semiconductor laser that connects and
Photodetector system and described Photoelectric Detection system that testing fiber is connected respectively with described fiber optic interferometric instrument and testing fiber
The overall control that the digital signal processor that system connects is connected respectively with described digital signal processor and laser frequency controller
Device, described photodetector system includes polarization diversity device, differential receiver, double balance receiver, analog signal conditioner device, non-thread
Property frequency sweep corrector and A/D converter adc, described testing fiber is connected with described polarization diversity device, described polarization diversity device
Be connected with described pair of balance receiver, described fiber optic interferometric instrument is connected with described differential receiver, described differential receiver and
Double balance receiver are connected with described analog signal conditioner device, described analog signal conditioner device respectively with described nonlinear frequency sweeping school
Positive device and A/D converter adc connect, and described A/D converter adc is connected with described digital signal processor, described numeral
Signal processor and nonlinear frequency sweeping corrector are connected with described overall controller respectively；
Laser frequency controller controls distributed feedback type semiconductor laser to send excitation optical signal to testing fiber, is distributed
, through Michelson's interferometer device, Michelson's interferometer device will for the linear frequency sweep optical signal that feedback type semiconductor laser sends
This linear frequency sweep optical signal is divided into two-way, is concerned with through photodetector system and is mixed in wherein one tunnel, mainly enters testing fiber
Light has part back scattering, and rear orientation light meets fiber numerical aperture and injection end returns, referred to as flashlight, if propagated
Length meets the coherent condition of light, then flashlight and reference light are entered in Photodetection system and in light by fiber coupler
It is mixed on the photosurface of electrical resistivity survey examining system, Photodetection system will export the photoelectric current of corresponding frequencies, thus obtaining edge
Testing fiber scatter attenuation characteristic everywhere, can deduce the length of testing fiber simultaneously by the maximum of test frequency,
The length value of testing fiber scatter attenuation characteristic everywhere and testing fiber reaches master controller through digital signal processor, main
The normal data of storage in measurement data and memorizer is contrasted and is analyzed, quick fault point by controller, generates event
Barrier analysis chart and report, and this fault data information and result are sent to the user interface on overall controller, described prison
Control center is provided with user interface and accident warning device, and user interface is used for showing fault data information and result, and this patent leads to
Cross frequency-domain analysiss to obtain the transmission characteristic of tested optical fiber (or device), and then record its performance and failure condition；
Optical fiber fault detecting system includes power management module, and described power management module is with described overall controller even
Connect, provide power supply to whole system；Also include the malfunction coefficient lamp being connected with described overall controller, for reminding user malfunction
Report to the police.
Technological means disclosed in this utility model scheme are not limited only to the technological means disclosed in above-mentioned embodiment, also
Including the technical scheme being made up of above technical characteristic combination in any.It should be pointed out that the ordinary skill for the art
For personnel, on the premise of without departing from this utility model principle, some improvements and modifications can also be made, these improve and moisten
Decorations are also considered as protection domain of the present utility model.
Claims (6)
1. a kind of optical fiber fault detecting system it is characterised in that: include laser frequency controller and described laser frequency controller
The fiber optic interferometric instrument that is connected with described distributed feedback type semiconductor laser of distributed feedback type semiconductor laser that connects and
Photodetector system and described Photoelectric Detection system that testing fiber is connected respectively with described fiber optic interferometric instrument and testing fiber
The overall control that the digital signal processor that system connects is connected respectively with described digital signal processor and laser frequency controller
Device.
2. optical fiber fault detecting system according to claim 1 it is characterised in that: described photodetector system include polarize
Diversity device, differential receiver, double balance receiver, analog signal conditioner device, nonlinear frequency sweeping corrector and A/D converter
Adc, described testing fiber is connected with described polarization diversity device, and described polarization diversity device is connected with described pair of balance receiver, institute
State fiber optic interferometric instrument to be connected with described differential receiver, described differential receiver and double balance receiver and described analogue signal
Conditioner connects, and described analog signal conditioner device is connected with described nonlinear frequency sweeping corrector and A/D converter adc respectively,
Described A/D converter adc is connected with described digital signal processor, and described digital signal processor and nonlinear frequency sweeping correct
Device is connected with described overall controller respectively.
3. optical fiber fault detecting system according to claim 1 it is characterised in that: include power management module, described electricity
Source control module is connected with described overall controller.
4. optical fiber fault detecting system according to claim 1 it is characterised in that: described overall controller is provided with user
Interface.
5. optical fiber fault detecting system according to claim 1 it is characterised in that: include being connected with described overall controller
Malfunction coefficient lamp.
6. optical fiber fault detecting system according to claim 1 it is characterised in that: described fiber optic interferometric instrument adopts mikey
Er Xun interferes instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620641719.8U CN205912061U (en) | 2016-06-27 | 2016-06-27 | Optical fiber fault detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620641719.8U CN205912061U (en) | 2016-06-27 | 2016-06-27 | Optical fiber fault detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205912061U true CN205912061U (en) | 2017-01-25 |
Family
ID=57812531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620641719.8U Active CN205912061U (en) | 2016-06-27 | 2016-06-27 | Optical fiber fault detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205912061U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764189A (en) * | 2017-09-30 | 2018-03-06 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of femtosecond laser Models of Absolute Distance Measurement Based device and method of a wide range of repetition modulation |
| CN110031779A (en) * | 2019-03-18 | 2019-07-19 | 郑州工程技术学院 | A kind of electric automobile lithium battery power failure detection device |
| CN110954298A (en) * | 2019-12-13 | 2020-04-03 | 江苏骏龙光电科技股份有限公司 | Optical frequency domain reflectometer based on industrial all-in-one machine |
| CN113078945A (en) * | 2021-03-26 | 2021-07-06 | 广东电网有限责任公司清远供电局 | Power transmission line fault positioning method and system, electronic equipment and storage medium |
-
2016
- 2016-06-27 CN CN201620641719.8U patent/CN205912061U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764189A (en) * | 2017-09-30 | 2018-03-06 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of femtosecond laser Models of Absolute Distance Measurement Based device and method of a wide range of repetition modulation |
| CN107764189B (en) * | 2017-09-30 | 2019-08-27 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of femtosecond laser Models of Absolute Distance Measurement Based device and method of a wide range of repetition modulation |
| CN110031779A (en) * | 2019-03-18 | 2019-07-19 | 郑州工程技术学院 | A kind of electric automobile lithium battery power failure detection device |
| CN110954298A (en) * | 2019-12-13 | 2020-04-03 | 江苏骏龙光电科技股份有限公司 | Optical frequency domain reflectometer based on industrial all-in-one machine |
| CN113078945A (en) * | 2021-03-26 | 2021-07-06 | 广东电网有限责任公司清远供电局 | Power transmission line fault positioning method and system, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107917738A (en) | A kind of while measurement temperature, strain and the distributed optical fiber sensing system of vibration | |
| CN102759371B (en) | COTDR (coherent detection based optical time-domain reflectometry) fused long-distance coherent detection brilouin optical time-domain analyzer | |
| CN205912061U (en) | Optical fiber fault detecting system | |
| CN101592475B (en) | Fully distributed fiber Rayleigh and Raman scattering photon strain and temperature sensor | |
| CN102506904B (en) | Spontaneous Brillouin scattering optical time domain reflectometer based on superconductive nanowire single-proton detector | |
| CN103591971B (en) | A kind of localization method of fiber grating | |
| CN102997045B (en) | Optical fiber sensing natural gas pipeline leakage event identification method and device | |
| CN107238412B (en) | A kind of while monitoring vibration, stress, temperature distributed fiberoptic sensor | |
| CN207850562U (en) | Multifunctional optical fiber distributed on line monitoring equipment | |
| CN102829807B (en) | BOTDA (Brillouin Optical Time Domain Analyzer) and POTDR (Polarization Optical Time Domain Reflectometer) combined distributed type optical fiber sensing system | |
| CN103090813A (en) | High resolution sensing system measuring beat-length and strain of polarization maintaining optical fiber based on optical frequency domain reflectometer (OFDR) system | |
| CN202648830U (en) | A distributed fiber sensing device based on Brillouin scattering | |
| CN102721484B (en) | Distributed optical fiber sensing device based on brillouin scattering | |
| CN102589748A (en) | Environmental temperature measurement method based on optical fiber Rayleigh and Brillouin principle | |
| CN102829812B (en) | Brillouin optical time domain analysis meter capable of locking frequencies of two lasers based on optical phase-locked loop | |
| CN105716638A (en) | Novel COTDR detecting device and realizing method based on complementation light generated by optical switch | |
| CN204087417U (en) | Temperature detected by optical fiber fire detector system | |
| CN203465033U (en) | Brillouin distributed type optical-fiber temperature sensor based on wide-spectrum light source | |
| CN109579726A (en) | A kind of long gauge length distribution type fiber-optic Brillouin sensing-demodulating system and strain measurement method | |
| CN102997056A (en) | Method for measuring distance between natural gas pipe leakage detecting sensors | |
| CN109991511A (en) | A kind of overhead transmission line lightning stroke monitoring device and monitoring method | |
| CN102176684A (en) | Distributed optical fiber sensor for simultaneously monitoring engineering structure entirety and local strain | |
| CN211740563U (en) | Optical time domain reflectometer | |
| CN203572631U (en) | Optical time-domain reflectometer based on superconducting nanowire single-photon detector | |
| CN205229527U (en) | Power cable connects composite cable for temperature monitoring and monitoring system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |