CN200979076Y - Distributed optical fiber oil gas pipeline alarming and sensor device - Google Patents
Distributed optical fiber oil gas pipeline alarming and sensor device Download PDFInfo
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- CN200979076Y CN200979076Y CN 200620026938 CN200620026938U CN200979076Y CN 200979076 Y CN200979076 Y CN 200979076Y CN 200620026938 CN200620026938 CN 200620026938 CN 200620026938 U CN200620026938 U CN 200620026938U CN 200979076 Y CN200979076 Y CN 200979076Y
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- fiber bragg
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 230000001427 coherent effect Effects 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims description 75
- 238000002310 reflectometry Methods 0.000 claims description 40
- 238000001228 spectrum Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000002168 optical frequency-domain reflectometry Methods 0.000 description 3
- 238000001069 Raman spectroscopy Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
- G01D5/35309—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
- G01D5/35316—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a Bragg gratings
-
- 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
- G01M11/08—Testing mechanical properties
- G01M11/083—Testing mechanical properties by using an optical fiber in contact with the device under test [DUT]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Alarm Systems (AREA)
Abstract
The utility model relates to the optical fiber sensor and oil-gas pipeline alarming art, which provides a distribution typed optical fiber oil-gas pipeline alarming sensor device. The adopted scheme of the utility model is that coherent lights emitted by a high coherent length adjustable laser go to an inlet end A of an optical circulator through a sensor optical fiber, go to a first outlet end B of the optical circulator then is transmitted to a optical fiber grating reflecting mirror case and a low reflecting rate optical fiber grating reflecting mirror, then go back to the optical circulator, and is transmitted to a photo diode by a second outlet end C of the optical circulator, signals of the photo diode is analyzed the needed information by a quick Fourier converter, side band filter and a frequency-spectral analyzer, and is finally displayed and early warned by a computer controlling system and a pre warning. The utility model is mainly used to manufacture a distribution typed optical fiber oil-gas pipeline alarming sensor device with simple structure, precise locating, and long monitoring distance, nearly need no maintenance, big monitoring range, high acuteness and being able to pre set a discrimination rate.
Description
Technical field
The utility model belongs to Fibre Optical Sensor, oil-gas pipeline alarm technique field, relates in particular to distribution type fiber-optic oil-gas pipeline warning sensing device.
Background technique
Optical fiber and fiber-optic grating sensor are the novel sensors of high speed development in recent years, optical fiber and fiber-optic grating sensor can collect the sensing of information and be transmitted in one, compare it with traditional sensor and have a lot of advantages: as explosion-proof, anti-electromagnetic interference, anticorrosive, anti-vibration, high temperature resistant, volume is little, and is in light weight, flexible, can under rugged environment, use especially.
Distributed fiberoptic sensor is except above above-mentioned advantage, it can measure the signal of any point at sensor fibre place, the existing market extensive use optical time domain reflectometer (OTDR), optical frequency territory teflectometer (OFDR) and various interferometer, for example M-Z interferometer etc. arranged.Distributed fiberoptic sensor belongs to intensity detection, and their common problems that exists are to be subject to light source fluctuating, fibre-optical bending, device aging etc. to influence their measuring accuracy and reliability.
Fiber-optic grating sensor overcomes above-mentioned light source fluctuating, fibre-optical bending, the device aging etc. of being subject to influences problem, and it belongs to Wavelength-encoding, not influenced by light source fluctuating, fibre-optical bending, device aging etc., and very high reliability, stability and repeated are arranged thus.Because fiber bragg grating sensing device is quasi-distributed, its deficiency is the place that it can only measuring optical fiber grating sensor place.General optical fiber grating sensing detection system is a Wavelength-encoding, has different centre wavelength as each fiber bragg grating of Japan Patent 11-061524, and the quantity that can measure is limited thus.Also one piece of article delivering as Wuhan University of Technology of useful same wavelength also is limited because each fiber-optic grating sensor requires that higher reflectivity, detected quantity are arranged.
The signal of distributing optical fiber sensing detection system optical time domain reflectometer (OTDR), optical frequency territory teflectometer (OFDR) from the optical fiber to the Raman (Raman) and Brillouin (Brillouin) scattering of temperature and pressure sensitivity, signal is little, in order to improve signal to noise ratio, need be averaged through repeatedly measuring, and these two kinds of scatterings are low to vibrations receptance.M-Z interferes detection system receptance height, but poor stability, to the object to be detected location difficulty.
Pipeline company of PetroChina Company Limited. has been described detecting a kind of negative pressure equipment of oil/gas pipe line; The leakage of oil/gas pipe line and stolen can make the pressure that leaks oil/gas pipe line two ends, location change, and can find the place of leaking and leaking.Situation when this device can find that oil gas has leaked in a large number, and can not forecast the incident that is about to take place stolen.
The oil and gas pipeline drilling hole of oil stolen first step need excavate the earth around the pipeline, and the shoveling process just has vibrations, and second step was that this can produce vibrations again to the oil and gas pipeline punching.
Up to the present, still there is not a kind of practicable oil/gas pipe line warning sensing device on the domestic and international market
In a word, the problem that known techniques exists has: the one, and distribution type optical fiber sensing equipment optical time domain reflectometer (OTDR), optical frequency territory teflectometer (OFDR) are because to shaking the responsive low online detection in the oil/gas pipe line warning sensing device that is not suitable for; The 2nd, M-Z interferometer rate of false alarm height, location difficulty, practical application has distance, and the 3rd, the detection of negative pressure that oil/gas pipe line is reported to the police can not be carried out early warning to triggering event.
Summary of the invention
For overcoming the deficiencies in the prior art, alert request at oil-gas pipeline, a kind of distribution type fiber-optic oil-gas pipeline warning sensing device is provided, this system architecture is simple, accurate positioning, monitoring distance are long, collection perception and signal are transmitted in one, can lay synchronously etc. with communication optical cable, need safeguard hardly.Also has big monitoring range, high sensitivity and can set in advance post and telecommunications such as resolution.The technical solution adopted in the utility model is: a kind of distributed optical fiber oil and gas pipeline warning sensing device, by high coherent length tunable laser, sensor fibre, optical circulator, by high coherent length tunable laser 1, sensor fibre 2, optical circulator 3, high reflectance fiber bragg grating reflector 4, antiradar reflectivity fiber bragg grating reflector 5, photodiode 6, amplifier 7, fast fourier transformer 8, sideband filter 9, spectrum analyzer 10, computer controlled system and pre-alarm are formed, high coherent length tunable laser 1 is connected to the input end a of optical circulator 3 through sensor fibre 2, the output of the first output terminal b of optical circulator 3 is connected to antiradar reflectivity fiber bragg grating reflector 5 by high reflectance fiber bragg grating reflector 4, the output of the second output terminal c of optical circulator 3 is connected to photodiode 6, photodiode 6 is via amplifier 7, fast fourier transformer 8, sideband filter 9 is connected to spectrum analyzer 10, and spectrum analyzer 10 machine control system as calculated is connected to pre-alarm.
Wherein, the reflectivity of high reflectance fiber bragg grating reflector is antiradar reflectivity fiber bragg grating reflectance of reflector more than 20 times at least, and the reflectivity of antiradar reflectivity fiber bragg grating reflector is 0.5%.
Antiradar reflectivity fiber bragg grating reflector is provided with several in the optical fiber with pipe installation, its number is determined according to the length of pipeline.
The coherent length of high coherent light laser must be greater than 2 π times of tested distance, and its centre wavelength equates with the centre wavelength of fiber bragg grating reflector and antiradar reflectivity fiber bragg grating reflector.
Sideband filter is to have the sideband filter of selecting sideband exponent number function.
Spectrum analyzer is to have the spectrum analyzer of selecting the preset frequency function.
The utility model can bring following technique effect:
Owing to adopted high reflectance fiber bragg grating reflector, antiradar reflectivity fiber bragg grating reflection mirror structure, antiradar reflectivity fiber bragg grating reflector be sensor be again reflector, thereby the utility model is highly sensitive, accurate positioning;
Because by high reflectance fiber bragg grating reflector of the present utility model, antiradar reflectivity fiber bragg grating reflector and the predeterminable resolution of signal receiving and analyzing part, thereby the utility model can have long monitoring distance and big monitoring range;
Antiradar reflectivity fiber bragg grating reflector of the present utility model and communication optical cable are laid, imbed underground synchronously, thereby the utility model need safeguard hardly, Security, good concealment, and very difficult quilt is realized destruction;
In addition, the utility model also has simple in structure, the characteristics that cost is low.
Description of drawings
The tamper-proof leakage early warning of Fig. 1 pipeline detection system overall structure figure schematic representation.
Among the figure, 1 high coherent length tunable laser, 2 sensor fibres, 3 optical circulators, 4 high reflectance fiber bragg grating reflectors, 5 antiradar reflectivity fiber bragg grating reflectors, 6 photodiodes, 7 amplifiers, 8 fast fourier transformer, 9 sideband filters, 10 spectrum analyzers, 11 computer controlled systems, 12 pre-alarms, L0 is an optical circulator 3, high reflectance fiber bragg grating reflector 4 spacings, L1 is the distance between high reflectance fiber bragg grating reflector 4 and first grazing shot rate fiber bragg grating reflector, the distance of first antiradar reflectivity fiber bragg grating reflector and second antiradar reflectivity fiber bragg grating reflector is L2, and the rest may be inferred for all the other.
Fig. 2 is a wide bandwidth antiradar reflectivity fiber bragg grating reflector schematic representation.
Fig. 3 is one section distributed sensing fiber spectrogram with fiber bragg grating reflector.
Fiber bragg grating reflector spectrum schematic representation when Fig. 4 does not have external disturbance.
Fig. 5 is the spectrum schematic representation of the 3rd fiber bragg grating reflector place when the disturbance external disturbance is arranged: middlely be main peak, both sides are sideband.
Embodiment
Specify the utility model below in conjunction with drawings and Examples.
The utility model principle as shown in Figure 1.
1), light source: the frequency sweeping laser, light () field is: E=E
0Exp (2 π ν t)
In measurement time, its frequency is linear change in time: ν=ν
0+ α t
2), sensor fibre:
High reflectance fiber bragg grating reflector 4 and a series of antiradar reflectivity fiber bragg grating reflector 5 are set in the optical fiber with pipelining, their spacing is respectively: high reflectance fiber bragg grating reflector 4 and optical circulator 3 spacings are L0, the distance of high reflectance fiber bragg grating reflector 4 and first antiradar reflectivity fiber bragg grating reflector is L1, the distance of first antiradar reflectivity fiber bragg grating reflector and second antiradar reflectivity fiber bragg grating reflector is L2, and the rest may be inferred for all the other.
3), heterodyne:
With light () the E of high reflectance fiber bragg grating reflector 4 with first antiradar reflectivity fiber bragg grating mirror reflects
0And E
1Be example, the photoelectric current that they produce on photodiode PD is:
i
01＝k(E
0+E
1)*(E
0+E
1)
＝k[(E
0*E
0+E
1*E
1)+(E
0*E
1+E
0E
1*)]
(DC terms) (difference frequency term)
The alternating component of this photoelectric current is:
i
01Ac＝E
0*E
1+E
0E
1*＝2|E
0||E
1|cos(ω
01t)
Wherein, ω
01=2 π α Δ t=2 π α (2nL
0/ C)=4 π α nL
0/ C
In like manner, to the reflected light of other antiradar reflectivity fiber bragg grating reflector, they and high reflectance fiber bragg grating reflector 4 catoptrical difference frequencies are:
ω
02＝ω
01+α(2nL
1/C)
ω
03＝ω
01+α[2n(L
1+L
2)/C]
ω
04＝ω
01+α[2n(L
1+L
2+L
3)/C]
The utility model uses above-mentioned principle just, makes system with its technical leading superiority, has remedied sound wave monitoring rate of false alarm height, unfavorable factors such as transmission line complexity and electric wire transmission.And it is highly sensitive to interfere sensing to have than optical fiber mach pool moral (M-Z), locatees characteristic of accurate more.
Further specify the utility model below in conjunction with accompanying drawing.
1.1 system forms
Optical fiber transducer
1.2 the discriminating at disturbance and position: high reflectance fiber bragg grating reflector 4 and a series of antiradar reflectivity fiber bragg grating reflector 5 are set in the optical fiber with pipelining, their spacing is respectively: high reflectance fiber bragg grating reflector 4 and optical circulator 3 spacings are L0, the distance of high reflectance fiber bragg grating reflector 4 and first antiradar reflectivity fiber bragg grating reflector is L1, the distance of first antiradar reflectivity fiber bragg grating reflector and second antiradar reflectivity fiber bragg grating reflector is L2, and the rest may be inferred for all the other.
If there is a disturbance in the external world, the reflected light of spread fiber has a frequency shift in the system, via surveillance device, detects its disturbance type and position.Wherein disturbance type is determined that by frequency spectrum the position is determined by the reflector that frequency characterizes.
Disturbance effect:
If have a vibration to make the length between them that one variation be arranged on the basis of original L between i antiradar reflectivity fiber bragg grating reflector and i+1 antiradar reflectivity fiber bragg grating reflector, i, j are positive integer, then:
L
i，i+1＝L+ΔLsinΩt
Then difference frequency ω 0i does not change, and all difference frequency ω
0, jJ＞i will have an additional phase difference
φ＝2πnΔLsinΩt/λ
And the corresponding additional frequency of phase difference therewith:
Δω＝dφ/dt＝2πnΔLΩcosΩt/λ
Wherein Ω is a forcing frequency, and Δ L is the caused elongate optical fiber Oscillation Amplitude in optical fiber place ambient vibration (disturbance).
5), the discriminating at disturbance position:
A frequency shift surveillance device is arranged, if difference frequency ω in the system
01To ω
0iAll do not change, and ω
0j, frequency shift is arranged when j＞i, then disturbance results between interval i antiradar reflectivity fiber bragg grating reflector and i+1 the antiradar reflectivity fiber bragg grating reflector.
6), in the system, FFT is a FFT hardware, as the real time spectral analysis of signal.Microcomputer PC is as the control of FFT, and the frequency sweep of light source is controlled, Amplifier Gain control, the analysis and judgement demonstration of signal and the generation of alarm signal.
7) as precedent, it is the first step the incident of drilling hole of oil stolen that the utility model can achieve the goal, and just in time finds when second step at the most, to prevent pipeline destroyed.
1.3 system group network and warning scheme
Native system can be realized the alarm signal transmission, and existing network interface adopts Ethernet interface, and bottom adopts ICP/IP protocol, and the alarm signal data protocol can be determined by the user.
Itself has alarm indication monitoring system.
Concrete enforcement of the present utility model is provided in detail by following examples and accompanying drawing thereof.
1,, the fiber bragg grating reflector is inserted in the sensor fibre, and the loss that requires sensor fibre is less than 0.6dB/km according to the requirement of setting.
2, sensor fibre is GYTA53 and other armouring optical cables.
3, sensing optic cable and oil and gas pipeline are laid simultaneously.
4, design and debugging demodulation detection facility, this equipment contains high coherent length laser, optical circulator, photodetector, amplifier, sideband filter, fast fourier transformer, spectrum analyzer, computer is formed.
The above only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model is done any simple modification, equivalent variations and modification to above embodiment, all belongs in the scope of technical solutions of the utility model.
Claims (6)
1. a distribution type fiber-optic oil-gas pipeline is guarded against sensing device, it is characterized in that, by high coherent length tunable laser (1), sensor fibre (2), optical circulator (3), high reflectance fiber bragg grating reflector (4), antiradar reflectivity fiber bragg grating reflector (5), photodiode (6), amplifier (7), fast fourier transformer (8), sideband filter (9), spectrum analyzer (10), computer controlled system and pre-alarm are formed, high coherent length tunable laser (1) is connected to the input end a of optical circulator (3) through sensor fibre (2), the output of the first output terminal b of optical circulator (3) is connected to antiradar reflectivity fiber bragg grating reflector (5) by high reflectance fiber bragg grating reflector (4), the output of the second output terminal c of optical circulator (3) is connected to photodiode (6), photodiode (6) is via amplifier (7), fast fourier transformer (8), sideband filter (9) is connected to spectrum analyzer (10), and spectrum analyzer (10) machine control system as calculated is connected to pre-alarm.
2. a kind of distribution type fiber-optic oil-gas pipeline warning sensing device according to claim 1, it is characterized in that, the reflectivity of high reflectance fiber bragg grating reflector (4) is antiradar reflectivity fiber bragg grating reflector (5) reflectivity more than 20 times at least, and the reflectivity of an antiradar reflectivity fiber bragg grating reflector (5) is 0.5%.
3. a kind of distribution type fiber-optic oil-gas pipeline warning sensing device according to claim 1 is characterized in that antiradar reflectivity fiber bragg grating reflector (5) is provided with several in the optical fiber with pipe installation, and its number is determined according to the length of pipeline.
4. a kind of distribution type fiber-optic oil-gas pipeline warning sensing device according to claim 1, it is characterized in that, the coherent length of high coherent light laser (1) must be greater than 2 π times of tested distance, and its centre wavelength equates with the centre wavelength of high fiber bragg grating reflector (4) and antiradar reflectivity fiber bragg grating reflector (5).
5. a kind of distribution type fiber-optic oil-gas pipeline warning sensing device according to claim 1 is characterized in that sideband filter (9) is to have the sideband filter of selecting sideband exponent number function.
6. a kind of new distribution type optical fiber oil-gas pipeline warning sensing device according to claim 1 is characterized in that spectrum analyzer (10) is for having the spectrum analyzer of selecting the preset frequency function.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620026938 CN200979076Y (en) | 2006-08-04 | 2006-08-04 | Distributed optical fiber oil gas pipeline alarming and sensor device |
| PCT/CN2007/070414 WO2008017276A1 (en) | 2006-08-04 | 2007-08-04 | A distributed optical fiber warning and sensing system for oil and gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620026938 CN200979076Y (en) | 2006-08-04 | 2006-08-04 | Distributed optical fiber oil gas pipeline alarming and sensor device |
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| Publication Number | Publication Date |
|---|---|
| CN200979076Y true CN200979076Y (en) | 2007-11-21 |
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|---|---|---|---|
| CN 200620026938 Expired - Lifetime CN200979076Y (en) | 2006-08-04 | 2006-08-04 | Distributed optical fiber oil gas pipeline alarming and sensor device |
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| Country | Link |
|---|---|
| CN (1) | CN200979076Y (en) |
| WO (1) | WO2008017276A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908505B (en) * | 2006-08-04 | 2012-01-04 | 天津爱天光电子科技有限公司 | Alarm sensing system for distributed optical fiber oil and gas pipeline |
| CN101266024B (en) * | 2008-05-09 | 2012-03-14 | 于晋龙 | Distributed optical fibre oil gas conveying pipeline early early-warning system based on polarization detection |
| CN104459677A (en) * | 2014-12-23 | 2015-03-25 | 苏州江奥光电科技有限公司 | Combined vernier grating and ranging system thereof |
| CN106764463A (en) * | 2017-03-08 | 2017-05-31 | 武汉理工大学 | A kind of pipe leakage based on optical fiber grating sensing, on-line corrosion monitoring device and method |
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| CN101255951B (en) * | 2008-02-25 | 2012-06-27 | 郑州大学 | Method for improving oil gas pipe leakage and performance of instruction testing distributed optical fibre sensor |
| CN102062730B (en) * | 2010-12-20 | 2013-06-19 | 天津亿利科能源科技发展股份有限公司 | Buried oil pipeline external-corrosion real-time monitoring device based on optical fiber sensor |
| CN102242869A (en) * | 2011-06-21 | 2011-11-16 | 北京一轻研究院 | Double-Sagnac-optical-fiber-interferometer-based pipeline leakage monitoring device and method |
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| CN103912792B (en) * | 2014-04-18 | 2016-05-04 | 青岛厚科化学有限公司 | Bushing type underground piping based on fiber grating leaks early warning system and method thereof |
| GB201503861D0 (en) | 2015-03-06 | 2015-04-22 | Silixa Ltd | Method and apparatus for optical sensing |
| GB2571540B (en) | 2018-02-28 | 2020-10-28 | Craley Group Ltd | Improvements in or relating to the monitoring of fluid pipes |
| CN108468950A (en) * | 2018-05-17 | 2018-08-31 | 钦州学院 | A kind of natural gas standpipe early warning system and method for early warning based on Fibre Optical Sensor |
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| GB9526582D0 (en) * | 1995-12-28 | 1996-02-28 | Bicc Plc | Optical line system |
| JP2000258190A (en) * | 1999-03-09 | 2000-09-22 | Mitsubishi Cable Ind Ltd | Sensor employing fiber grating and physical quantity measuring method |
| US6212306B1 (en) * | 1999-10-07 | 2001-04-03 | David J. F. Cooper | Method and device for time domain demultiplexing of serial fiber Bragg grating sensor arrays |
| US6785004B2 (en) * | 2000-11-29 | 2004-08-31 | Weatherford/Lamb, Inc. | Method and apparatus for interrogating fiber optic sensors |
| CN1164886C (en) * | 2002-12-10 | 2004-09-01 | 西安交通大学 | Intelligent online monitoring method for oil and gas pipeline leakage based on distributed optical fiber sensors |
| CN1228610C (en) * | 2003-06-18 | 2005-11-23 | 中国石油天然气集团公司 | Sensing and testing fiber grating system for oil and gas pipeline detection |
| CN1254890C (en) * | 2003-11-06 | 2006-05-03 | 中国科学院长春光学精密机械与物理研究所 | Wavelength tunable dual-cladding-layer optical fiber laser |
| CN1256570C (en) * | 2004-12-07 | 2006-05-17 | 天津大学 | Method for Realizing Measurement of Multi-Channel Fiber Bragg Grating Sensing Device |
| CN1908505B (en) * | 2006-08-04 | 2012-01-04 | 天津爱天光电子科技有限公司 | Alarm sensing system for distributed optical fiber oil and gas pipeline |
-
2006
- 2006-08-04 CN CN 200620026938 patent/CN200979076Y/en not_active Expired - Lifetime
-
2007
- 2007-08-04 WO PCT/CN2007/070414 patent/WO2008017276A1/en not_active Ceased
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1908505B (en) * | 2006-08-04 | 2012-01-04 | 天津爱天光电子科技有限公司 | Alarm sensing system for distributed optical fiber oil and gas pipeline |
| CN101266024B (en) * | 2008-05-09 | 2012-03-14 | 于晋龙 | Distributed optical fibre oil gas conveying pipeline early early-warning system based on polarization detection |
| CN104459677A (en) * | 2014-12-23 | 2015-03-25 | 苏州江奥光电科技有限公司 | Combined vernier grating and ranging system thereof |
| CN106764463A (en) * | 2017-03-08 | 2017-05-31 | 武汉理工大学 | A kind of pipe leakage based on optical fiber grating sensing, on-line corrosion monitoring device and method |
| CN106764463B (en) * | 2017-03-08 | 2019-01-29 | 武汉理工大学 | A kind of pipe leakage based on optical fiber grating sensing, on-line corrosion monitoring device and method |
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| WO2008017276A1 (en) | 2008-02-14 |
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