CN106764460A - Distribution type fiber-optic aqueduct leakage positioning system - Google Patents
Distribution type fiber-optic aqueduct leakage positioning system Download PDFInfo
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- CN106764460A CN106764460A CN201611265448.1A CN201611265448A CN106764460A CN 106764460 A CN106764460 A CN 106764460A CN 201611265448 A CN201611265448 A CN 201611265448A CN 106764460 A CN106764460 A CN 106764460A
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- optical fiber
- wdm
- aqueduct
- couplers
- optical
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
Abstract
The invention provides a kind of distribution type fiber-optic aqueduct leakage positioning system, including optical system, the optical system includes the laser, front end system and the optical fiber circulator WDM that are sequentially connected, the optical system connects photodetector by front end system, convert optical signals to electric signal amplification, electric signal after amplification is converted into data signal by converter, and connects host computer by FPGA, and the host computer also controls laser to produce light source.Distributed fiberoptic sensor is arranged on aqueduct side by the present invention, is measured using the distributed fiberoptic sensor aqueduct leakage positioning system based on the conspicuous Zeng De of span, real-time data collection.The interference light echo cross-correlation function delay data along aqueduct according to measurement, judges the leakage point position of aqueduct.Positioning precision is high, and detection range is remote, distributed formula measurement, does not influence detection accuracy, reduces equipment cost.
Description
Technical field
The invention belongs to photoelectric sense technology field, more particularly, to a kind of distribution type fiber-optic aqueduct leakage positioning system
System.
Background technology
Distributed Optical Fiber Sensing Techniques collection sense and be transmitted in one, can detect simultaneously physical quantity space distribution information and
Varying information.Thus it is extremely suitable for that oil-gas pipeline, aqueduct and bridge, dam etc. be large-scale, long range facility real-time prison
Survey.Compared to scattered colour pattern or Sagnac type distributed optical fiber sensing system, span hertz-once German system has sensitivity high, real
When property is good, non-blind area the advantages of, in the detection of the weak output signals such as underground piping, with good practical and economic valency
Value.
Most sensor-based system is all based on the framework of industrial computer plus capture card to design.Though the pattern has structure
Simply, the advantage being easily achieved, but undersampling, the response time is long is to cause System spatial resolution low and poor real master
Want one of reason.
The content of the invention
In view of this, the present invention is directed to propose a kind of distribution type fiber-optic aqueduct leakage positioning system, according to temperature field
The situation of change of distribution judges leakage point position.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of distribution type fiber-optic aqueduct leakage positioning system, including optical system, the optical system are included successively
The laser of connection, front end system and optical fiber circulator WDM, the optical system connect photodetector by front end system,
Electric signal amplification is converted optical signals to, the electric signal after amplification is converted into data signal by converter, and by FPGA
Connection host computer, the host computer also controls laser to produce light source；The optical fiber circulator WDM includes the first optical fiber circulator
WDM and the second optical fiber circulator WDM；The photodetector includes the first photodetector and the second photodetector；
The front end system includes a 3db couplers, the 2nd 3db couplers, the 3rd 3db couplers, the first polarization control
Device processed, the second Polarization Controller；
The laser connects a 3db couplers, and a 3db couplers connect the first optical fiber circulator respectively
WDM and the second optical fiber circulator WDM, the first optical fiber circulator WDM connect the 2nd 3db couplers, the 2nd 3db couplings
Device connects the first Polarization Controller, the second Polarization Controller, first Polarization Controller, the connection of the second Polarization Controller respectively
3rd 3db couplers, the 3rd 3db couplers connect the second optical fiber circulator WDM.
Further, connected by sensing optic cable between the front end system and optical fiber circulator WDM.
Further, the sensing optic cable is armouring sensing optic cable.
Relative to prior art, a kind of distribution type fiber-optic aqueduct leakage positioning system of the present invention has following
Advantage：Distributed fiberoptic sensor is arranged on aqueduct side by the present invention, using the distributed light based on the conspicuous Zeng De of span
Fiber sensor aqueduct leakage positioning system is measured, real-time data collection.It is dry along aqueduct according to measurement
Light echo cross-correlation function delay data is related to, the leakage point position of aqueduct is judged.Positioning precision is high, and detection range is remote, distribution
Formula formula is measured, and does not influence detection accuracy, reduces equipment cost；
The distributed fiberoptic sensor integrated level of aqueduct leakage positioning system based on the conspicuous Zeng De of span is high, convenient
Install, machine volume reduces, intelligent level is high, and security is good, has both met the major function of distributed optical fiber sensor
It is required that, system cost can be substantially reduced again, system design is carried out according to detection range requirement；
The distributed fiberoptic sensor aqueduct leakage positioning system of the conspicuous Zeng De of span, can it is very big on to defeated
Waterpipe leakage point carries out detection and localization.Echo noise is small, easy for installation, original measuring system is not influenceed, application field
It is wider.
Brief description of the drawings
The accompanying drawing for constituting a part of the invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate, for explaining the present invention, not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is that a kind of structure connection of the distribution type fiber-optic aqueduct leakage positioning system described in the embodiment of the present invention is shown
It is intended to；
Fig. 2 is the structural representation of the optical system described in the embodiment of the present invention；
Description of reference numerals：
1- lasers；2- front end systems；3- sensing optic cables；4- optical fiber circulators WDM；The first optical fiber circulators of 41- WDM；
The second optical fiber circulators of 42- WDM；5- photodetectors；The photodetectors of 51- first；The photodetectors of 52- second；6-AD turns
Parallel operation；7-FPGA；8- host computers；The 3db couplers of 21- the；The 3db couplers of 22- the 2nd；The 3db couplers of 23- the 3rd；24-
One Polarization Controller；The Polarization Controllers of 25- second.
Specific embodiment
It should be noted that in the case where not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combination.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in figure 1, double Mach-Zehnder distributed optical fiber sensing systems mainly include host computer 8, FPGA, 7, AD conversion
Device 6,1550nm narrow linewidth lasers 1, front end system 2, sensing optic cable 3 and optical fiber circulator WDM4 composition.Wherein 1550nm is narrow
Line width laser 1, front end system 2, sensing optic cable 3 and optical fiber circulator WDM4 constitute optical system.Its course of work is：By upper
The position control light source of machine 8, obtains vibration signal light after whole optical system；Then exported by front end system 2, into light electrical resistivity survey
Device 5 is surveyed, electric signal amplification is converted optical signals to；Electric signal converter 6 after amplification is switched to data signal, FPGA7
It is responsible for the storage of signal, processes and communicated with host computer 8.
Its optical system is made up of following device：Optical system block diagram is illustrated in figure 2, its front end system 2 is main by the
One 3db couplers 21 and the 2nd 3db couplers 22, the first optical fiber circulator WDM41 and the second optical fiber circulator WDM42, first
Polarization Controller 24, the second Polarization Controller 25 are constituted, and the effect such as play light splitting, are polarized；Center section is armouring sensing optic cable,
Play biography light and detection vibration signal effect；Also constituted including three-dB coupler, play conjunction beam and beam splitting effect.
Its course of work is：The narrow linewidth laser 1 of 1550nm is divided into two beams of constant power through the first three-dB coupler 21
Light, it is a branch of along the first optical fiber circulator WDM41 is entered clockwise, because light beam can only be inverse in the first optical fiber circulator WDM41
Hour hands are walked, so light beam is directly entered the second three-dB coupler 22 without entering the first light by the first optical fiber circulator WDM41 outputs
Detector 51 is learned, the light beam in the 2nd 3db couplers 22 is divided into two beams through the first Polarization Controller 24, the second Polarization Controller 25
It is changed into polarised light, into the pickup arm of sensing optic cable 3, then closes beam by the 3rd three-dB coupler 23 again, produces interference light.Should
Interference light contain vibration or invade and harass signal, then through sensing optic cable 3 biography light arm enter the second optical fiber circulator WDM42.Pass light arm
To close the interference light of beam, therefore extraneous vibration will not be to its light strong production significant impact.And light beam is in the second optical fiber circulator
Can only be walked clockwise in WDM42, the interference light thus with vibration signal can only enter the second photodetector 52 without returning
The first three-dB coupler 21 is back to, the interference to laser 1 is produced.Similarly, another light beam walks one in systems in the counterclockwise direction
Vibration signal is carried after circle, the first photodetector 51 is can only enter.Time difference can be estimated by related operation, just positioned
Go out the positional information of vibration signal.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (3)
1. a kind of distribution type fiber-optic aqueduct leakage positioning system, it is characterised in that：Including optical system, the optical system
Including the laser (1), front end system (2) and the optical fiber circulator WDM (4) that are sequentially connected, the optical system passes through front end system
System (2) connects photodetector (5), converts optical signals to electric signal amplification, and the electric signal after amplification passes through converter (6)
Data signal is converted into, and host computer (8) is connected by FPGA (7), the host computer (8) also controls laser (1) to produce light
Source；The optical fiber circulator WDM (4) includes the first optical fiber circulator WDM (41) and the second optical fiber circulator WDM (42)；It is described
Photodetector (5) includes the first photodetector (51) and the second photodetector (52)；
The front end system (2) including a 3db couplers (21), the 2nd 3db couplers (22), the 3rd 3db couplers (23),
First Polarization Controller (24), the second Polarization Controller (24)；
The laser (1) connects a 3db couplers (21), and a 3db couplers (21) connect the first optical fiber respectively
Circulator WDM (41) and the second optical fiber circulator WDM (42), the first optical fiber circulator WDM (41) connects the 2nd 3db couplings
Device (22), the 2nd 3db couplers (22) connect the first Polarization Controller (24), the second Polarization Controller (25), institute respectively
State the first Polarization Controller (24), the second Polarization Controller (25) and connect the 3rd 3db couplers (23), the 3rd 3db couplings
Device (23) connects the second optical fiber circulator WDM (42).
2. a kind of distribution type fiber-optic aqueduct leakage positioning system according to claim 1, it is characterised in that：Before described
Connected by sensing optic cable (3) between end system (2) and optical fiber circulator WDM (4).
3. a kind of distribution type fiber-optic aqueduct leakage positioning system according to claim 2, it is characterised in that：The biography
Sensing optical cable (3) is armouring sensing optic cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611265448.1A CN106764460A (en) | 2016-12-30 | 2016-12-30 | Distribution type fiber-optic aqueduct leakage positioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611265448.1A CN106764460A (en) | 2016-12-30 | 2016-12-30 | Distribution type fiber-optic aqueduct leakage positioning system |
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| CN201611265448.1A Pending CN106764460A (en) | 2016-12-30 | 2016-12-30 | Distribution type fiber-optic aqueduct leakage positioning system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524922A (en) * | 2017-09-30 | 2017-12-29 | 必必优（深圳）科技有限公司 | A kind of pipe leakage infrasonic wave detection apparatus, system and method |
| CN107560711A (en) * | 2017-09-30 | 2018-01-09 | 必必优（深圳）科技有限公司 | A kind of distributed optical fiber sensor of segmented couples interference-type |
| CN108413257A (en) * | 2018-03-28 | 2018-08-17 | 中国计量大学 | A kind of buried water pipe monitoring system |
| CN112923854A (en) * | 2021-02-04 | 2021-06-08 | 辽宁省微波光电子工程研究有限公司 | MZ interference-based real-time positioning and sound discrimination intelligent alarm system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5679936A (en) * | 1979-12-05 | 1981-06-30 | Yokogawa Hokushin Electric Corp | Leakage detecting method |
| CN1862239A (en) * | 2006-06-15 | 2006-11-15 | 华中科技大学 | Distributed optical fiber vibration sensing method and apparatus thereof |
| CN102720949A (en) * | 2012-06-11 | 2012-10-10 | 天津大学 | Fiber duct leakage monitoring device and control method thereof |
| CN102352963B (en) * | 2011-10-09 | 2013-08-07 | 中国计量学院 | Mixing interference distributed optical fiber-based leakage detection device for underwater long-distance pipeline |
| CN203414195U (en) * | 2013-06-04 | 2014-01-29 | 燕山大学 | A BOTDR sensor using CCPONS pulse codes |
| CN103047540B (en) * | 2011-09-14 | 2015-12-02 | 中国石油天然气集团公司 | Based on the optical path system for monitoring leakage of natural gas of Fibre Optical Sensor |
| CN105371941A (en) * | 2015-12-16 | 2016-03-02 | 中国船舶重工集团公司第七〇五研究所 | Distributed optical fiber vibration sensing detection method based on optical circulator |
| CN206504114U (en) * | 2016-12-30 | 2017-09-19 | 天津市誉航润铭科技发展有限公司 | Based on the conspicuous once moral distributed fiberoptic sensor aqueduct leakage positioning system of span |
-
2016
- 2016-12-30 CN CN201611265448.1A patent/CN106764460A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5679936A (en) * | 1979-12-05 | 1981-06-30 | Yokogawa Hokushin Electric Corp | Leakage detecting method |
| CN1862239A (en) * | 2006-06-15 | 2006-11-15 | 华中科技大学 | Distributed optical fiber vibration sensing method and apparatus thereof |
| CN103047540B (en) * | 2011-09-14 | 2015-12-02 | 中国石油天然气集团公司 | Based on the optical path system for monitoring leakage of natural gas of Fibre Optical Sensor |
| CN102352963B (en) * | 2011-10-09 | 2013-08-07 | 中国计量学院 | Mixing interference distributed optical fiber-based leakage detection device for underwater long-distance pipeline |
| CN102720949A (en) * | 2012-06-11 | 2012-10-10 | 天津大学 | Fiber duct leakage monitoring device and control method thereof |
| CN203414195U (en) * | 2013-06-04 | 2014-01-29 | 燕山大学 | A BOTDR sensor using CCPONS pulse codes |
| CN105371941A (en) * | 2015-12-16 | 2016-03-02 | 中国船舶重工集团公司第七〇五研究所 | Distributed optical fiber vibration sensing detection method based on optical circulator |
| CN206504114U (en) * | 2016-12-30 | 2017-09-19 | 天津市誉航润铭科技发展有限公司 | Based on the conspicuous once moral distributed fiberoptic sensor aqueduct leakage positioning system of span |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524922A (en) * | 2017-09-30 | 2017-12-29 | 必必优（深圳）科技有限公司 | A kind of pipe leakage infrasonic wave detection apparatus, system and method |
| CN107560711A (en) * | 2017-09-30 | 2018-01-09 | 必必优（深圳）科技有限公司 | A kind of distributed optical fiber sensor of segmented couples interference-type |
| CN108413257A (en) * | 2018-03-28 | 2018-08-17 | 中国计量大学 | A kind of buried water pipe monitoring system |
| CN112923854A (en) * | 2021-02-04 | 2021-06-08 | 辽宁省微波光电子工程研究有限公司 | MZ interference-based real-time positioning and sound discrimination intelligent alarm system |
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