CN102062730A - Buried oil pipeline external-corrosion real-time monitoring device based on optical fiber sensor - Google Patents
Buried oil pipeline external-corrosion real-time monitoring device based on optical fiber sensor Download PDFInfo
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- CN102062730A CN102062730A CN2010105963017A CN201010596301A CN102062730A CN 102062730 A CN102062730 A CN 102062730A CN 2010105963017 A CN2010105963017 A CN 2010105963017A CN 201010596301 A CN201010596301 A CN 201010596301A CN 102062730 A CN102062730 A CN 102062730A
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Abstract
The invention relates to a buried oil pipeline external-corrosion real-time monitoring device based on an optical fiber sensor, belonging to the technical field of sensing detection. The buried oil pipeline external-corrosion real-time monitoring device based on the optical fiber sensor is characterized by comprising a microprocessor, a spectrum demodulator and a blazed fiber brag grating sensor; the microprocessor is connected with the spectrum demodulator which is connected with the blazed fiber brag grating sensor; the blazed fiber brag grating sensor consists of a blazed fiber brag grating, a needle-like housing and a protective sleeve; and the blazed fiber brag grating is assembled in the needle-like housing, an optical fiber of the spectrum demodulator is connected into the needle-like housing, and the end part of the needle-like housing is provided with the protective sleeve. The invention has the advantages of simple structure, compact design, convenience of operation, low manufacture cost, stable performance, interference resistance, corrosion resistance, high measurement accuracy, real-time detection, high cost performance and the like, and is suitable for working in a severe environment.
Description
Technical field
The invention belongs to the sensing detection technical field, particularly relate to a kind of ground oil-gas pipeline that buries and corrode real-time monitoring device outward based on Fibre Optical Sensor.
Background technology
At present, oil-gas pipeline is as the visual plant of production of hydrocarbons facility, and the outer corrosion of pipeline is normally caused by water, air, bacterium, and the breakage of external anti-corrosion layer causes pipeline that etch-proof major reason takes place just.
Traditional buried pipeline daily servicing is used sacrificial protection usually, detection means many according to NACE ECDA(external corrosion directly assess) method, more options PCM, DCVG/ACVG, many kinds of detection meanss of CIPS adopted simultaneously when external anti-corrosion layer was detected.In actual applications, because open-air pipeline environmental factor complexity, therefore the employing of the above-mentioned technological means of multiple condition restriction such as physical features, face of land structures, crops along the line exists certain blind area, the failure risk of the pipeline of increase all the time; The current signals that rely on are judged the external anti-corrosion layer situation indirectly on the traditional detection means principle, then judge pipe condition indirectly, but it is more to consider that signal is subjected to the circumstance complication factor affecting, so in excavation checking work, error is arranged more, though be in the technical licensing scope, but caused the waste of the cost of overhaul, and incured loss through delay searching of problem points.To sum up, because conventional art all can't satisfy actual needs from each side such as time, position judgment, trend predictions, a kind of invention that can judge the novel real time on-line monitoring technology of the outer etch state of pipeline is particularly necessary.
The present invention utilizes optical fiber sensing technology, designs the distribution type fiber-optic index sensor, and lays along burying the ground oil-gas pipeline.When burying ground oil-gas pipeline external anti-corrosion layer generation damage, underground liquid can infiltrate external anti-corrosion layer, thereby is detected by the optical fibre refractivity sensor.
Summary of the invention
The present invention provides a kind of ground oil-gas pipeline that buries based on Fibre Optical Sensor to corrode real-time monitoring device outward for solving the problem that prior art exists.
The object of the invention provide a kind of have simple in structure, compact to design, easy to operate, low cost of manufacture, stable performance, anti-interference, corrosion-resistant, be adapted at working under the rugged surroundings, detect in real time, the measuring accuracy height, position judgment is accurate, and the ground oil-gas pipeline that buries based on Fibre Optical Sensor that has than characteristics such as high performance-price ratios corrodes real-time monitoring device outward.
The present invention utilizes optical fiber as senser element, and design distribution type fiber-optic index sensor and the external anti-corrosion layer of imbedding burying the ground oil-gas pipeline constitute monitoring system.Provide a kind of and can carry out outer corrosion monitoring new technology to buried pipeline by real-time online.Make it can pass through sensor, accurately monitor the variation and the trend of outer corrosion risk at the monitoring point.
Bury the outer corrosion monitoring technology of ground oil-gas pipeline, utilize optical fiber as senser element, adopt distribution type fiber-optic refractive index sensing technology, the variation by the detection fiber optical parameter comes sensing external anti-corrosion layer damaged degree.Can realize real-time, networked monitoring and give the degree and the risk assessment of out corroding.
The ground oil-gas pipeline that buries that the present invention is based on Fibre Optical Sensor corrodes real-time monitoring device outward and adopts following technical scheme:
A kind of ground oil-gas pipeline that buries based on Fibre Optical Sensor corrodes real-time monitoring device outward, and be characterized in: real-time monitoring device comprises microprocessor, spectrum (FBG) demodulator and blazed fiber bragg grating sensor; Microprocessor connects the spectrum (FBG) demodulator, and the spectrum (FBG) demodulator connects the blazed fiber bragg grating sensor; The blazed fiber bragg grating sensor has blazed fiber bragg grating, needle-like shell and protective casing to constitute, and blazed fiber bragg grating is assemblied in the needle-like shell, and the optical fiber that connects the spectrum (FBG) demodulator is arranged in the needle-like shell, and the needle-like outer casing end is equipped with protective casing.
The ground oil-gas pipeline that buries that the present invention is based on Fibre Optical Sensor corrodes real-time monitoring device outward and can also adopt following technical measures:
The described ground oil-gas pipeline that buries based on Fibre Optical Sensor corrodes real-time monitoring device outward, and be characterized in: the needle-like shell is that semicircle is barrel-shaped at the position of assembling blazed fiber bragg grating.
The described ground oil-gas pipeline that buries based on Fibre Optical Sensor corrodes real-time monitoring device outward, is characterized in: the single-mode fiber that connects the spectrum (FBG) demodulator is arranged in the needle-like shell.
The described ground oil-gas pipeline that buries based on Fibre Optical Sensor corrodes real-time monitoring device outward, is characterized in: when the blazed fiber bragg grating sensor was monitored in real time, the blazed fiber bragg grating sensor was around burying the ground oil-gas pipeline structure that radially distributes.
Advantage that the present invention has and good effect:
The ground oil-gas pipeline that buries based on Fibre Optical Sensor corrodes real-time monitoring device outward, owing to adopted brand-new technology scheme of the present invention, compared with prior art, the present invention adopts optical fiber as senser element, advantage based on optical fiber itself, this sensor has compact conformation, measuring accuracy height, anti-interference, and is corrosion-resistant, and characteristics such as be adapted at working under the rugged surroundings.Simultaneously, can utilize its formation to bury the external anti-corrosion layer breakage monitoring system of ground oil pipeline, monitor damaged degree in real time, and provide trend and risk assessment.
The present invention has simple in structure, and is compact to design, easy to operate, low cost of manufacture, and stable performance, anti-interference, corrosion-resistant, be adapted at working under the rugged surroundings, detect in real time, the measuring accuracy height, position judgment is accurate, has than advantages such as high performance-price ratios.
Description of drawings
Fig. 1 is the syndeton synoptic diagram that the ground oil-gas pipeline corrodes real-time monitoring device outward that buries that the present invention is based on Fibre Optical Sensor;
Fig. 2 is the structural representation of blazed fiber bragg grating sensor among Fig. 1.
Among the figure, 1. blazed fiber bragg grating, 2. single-mode fiber, 3. needle-like shell, 4. protective casing, 5. fibre-optical splice, 6. blazed fiber bragg grating sensor, 7. spectrum (FBG) demodulator, 8. computing machine.
Embodiment
For further understanding technology contents of the present invention, characteristics and effect, enumerate following example now, and conjunction with figs. is described in detail as follows:
With reference to accompanying drawing 1 and Fig. 2.
The ground oil-gas pipeline that buries based on Fibre Optical Sensor corrodes real-time monitoring device outward, comprises computing machine 8, spectrum (FBG) demodulator 7 and blazed fiber bragg grating sensor 6.Computing machine 8 connects spectrum (FBG) demodulator 7, and spectrum (FBG) demodulator 7 connects blazed fiber bragg grating sensor 6; Blazed fiber bragg grating sensor 6 has blazed fiber bragg grating 1, needle-like shell 3 and protective casing 4 to constitute, and blazed fiber bragg grating 1 is assemblied in the needle-like shell 3, and the single-mode fiber 2 that connects the spectrum (FBG) demodulator is arranged in the needle-like shell 3, and the needle-like outer casing end is equipped with protective casing 4.The needle-like shell is that semicircle is barrel-shaped at the position of assembling blazed fiber bragg grating.When the blazed fiber bragg grating sensor was monitored in real time, the blazed fiber bragg grating sensor was around burying the ground oil-gas pipeline structure that radially distributes.
The concrete structure of present embodiment and the course of work:
Corroding real-time monitoring device outward based on the pipeline of Fibre Optical Sensor comprises:
1. probe shape distribution type fiber-optic index sensor
Primary structure comprises: overlength blazed fiber bragg grating 1, single-mode fiber 2, needle-like shell 3, protective casing 4, fibre-optical splice 5.Overlength blazed fiber bragg grating 1 is connected with an end of single-mode fiber 2.The other end of single-mode fiber 2 is connected with fibre-optical splice 5.Then it is penetrated in the needle-like shell 3.The structure of needle-like shell 3 is the semicircle barrel shaped structure, and the grid region of overlength blazed fiber bragg grating is positioned over the semicircle zone of needle-like shell 3 so that it can be immersed in the extraneous liquid.The two ends that then protective sleeve 4 are adhered to needle-like shell 3 are with protection optical fiber.
Cause that the external anti-corrosion layer damage reasons of burying the ground oil-gas pipeline is very complicated.The breakage of external anti-corrosion layer is a progressive process.Also be accompanied by the infiltration of underground water and other liquid simultaneously.Therefore, the core based on the distributed index sensor of optical fiber of design is the overlength blazed fiber bragg grating, and its grid region length can reach tens centimetres.Sensor integral body is designed to the insertion probe shape, and inserts or imbed the external anti-corrosion layer of pipeline to be measured as required.When breakage takes place external anti-corrosion layer,, infiltrate liquid and will partly or entirely surround probe shape Fibre Optical Sensor according to its damaged degree difference.And by monitoring the transmitted spectrum of overlength blazed grating, can analyze and obtain the degree of depth and the position that liquid immerses.
2. bury the outer corrosion monitoring network system of ground oil-gas pipeline
Primary structure comprises: probe shape distribution type fiber-optic index sensor 6, single-mode fiber 2, spectrum (FBG) demodulator 7, computing machine 8.Each probe shape distribution type fiber-optic index sensor 6 is linked to each other with spectrum (FBG) demodulator 7 by single-mode fiber 2.Spectrum (FBG) demodulator 7 links to each other with computing machine 8 by netting twine.The external anti-corrosion layer of oil-gas pipeline to be measured is imbedded or inserted to many probe shape distribution type fiber-optic index sensors 6, and be connected to the spectrum (FBG) demodulator, thereby constitute the outer corrosion monitoring system that buries the ground oil pipeline by optical fiber.Monitoring system is monitored the sensing data of each sensor in real time, and the external anti-corrosion layer of arrangement and analyzing oil and gas pipeline is damage state based.And compare sector-style danger assessment with historical record thereby the damaged trend that provides external anti-corrosion layer is gone forward side by side.
The concrete use: the overlength blazed fiber bragg grating of probe shape distribution type fiber-optic index sensor adopts the phase mask of 1550nm wave band to write system through the uv-exposure method, grid face tilt angle 8 degree, grid region length 10cm.It is 7um that single-mode fiber 2 adopts core diameter, the 1550nm silica fibre of surrounding layer 125um.Needle-like shell 3 adopts overall diameter 3mm, the semicircle barreled structure of interior diameter 2mm, and its material is the stearic material of corrosion resistant macromolecule.Its perforate length 11cm, length overall 15cm.
Claims (4)
1. the ground oil-gas pipeline that buries based on Fibre Optical Sensor corrodes real-time monitoring device outward, and it is characterized in that: real-time monitoring device comprises microprocessor, spectrum (FBG) demodulator and blazed fiber bragg grating sensor; Microprocessor connects the spectrum (FBG) demodulator, and the spectrum (FBG) demodulator connects the blazed fiber bragg grating sensor; The blazed fiber bragg grating sensor has blazed fiber bragg grating, needle-like shell and protective casing to constitute, and blazed fiber bragg grating is assemblied in the needle-like shell, and the optical fiber that connects the spectrum (FBG) demodulator is arranged in the needle-like shell, and the needle-like outer casing end is equipped with protective casing.
2. corrode real-time monitoring device outward according to the described ground oil-gas pipeline that buries based on Fibre Optical Sensor of claim 1, it is characterized in that: the needle-like shell is that semicircle is barrel-shaped at the position of assembling blazed fiber bragg grating.
3. corrode real-time monitoring device outward according to the described ground oil-gas pipeline that buries of claim 1, it is characterized in that: the single-mode fiber that connects the spectrum (FBG) demodulator is arranged in the needle-like shell based on Fibre Optical Sensor.
4. corrode real-time monitoring device outward according to claim 1, the 2 or 3 described ground oil-gas pipelines that bury based on Fibre Optical Sensor, it is characterized in that: when the blazed fiber bragg grating sensor was monitored in real time, the blazed fiber bragg grating sensor was around burying the ground oil-gas pipeline structure that radially distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010105963017A CN102062730B (en) | 2010-12-20 | 2010-12-20 | Buried oil pipeline external-corrosion real-time monitoring device based on optical fiber sensor |
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| CN2010105963017A CN102062730B (en) | 2010-12-20 | 2010-12-20 | Buried oil pipeline external-corrosion real-time monitoring device based on optical fiber sensor |
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| CN102062730A true CN102062730A (en) | 2011-05-18 |
| CN102062730B CN102062730B (en) | 2013-06-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016851A (en) * | 2012-12-06 | 2013-04-03 | 同济大学 | Smart pipeline with optical fiber sensing function and manufacturing method for smart pipeline |
| CN105890798A (en) * | 2016-06-12 | 2016-08-24 | 华电郑州机械设计研究院有限公司 | Distributed optical fiber corrosion detecting device for wet devulcanizing chimney |
| WO2020125305A1 (en) * | 2018-12-21 | 2020-06-25 | 宁波中车时代传感技术有限公司 | Series-connected integrated temperature and vibration sensor employing blazed grating and fiber bragg grating optical fiber |
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| CN2567548Y (en) * | 2002-09-13 | 2003-08-20 | 西安石油学院 | Fibre-optical grating sensor for testing gas-oil pipe |
| CN2630841Y (en) * | 2003-06-18 | 2004-08-04 | 中国石油天然气集团公司 | Opticalfiber grating sensing and measuring system for oil-gas pipeline detection |
| WO2008017276A1 (en) * | 2006-08-04 | 2008-02-14 | Linping Ma | A distributed optical fiber warning and sensing system for oil and gas pipeline |
| CN101769442A (en) * | 2010-01-18 | 2010-07-07 | 大连理工大学 | Method for monitoring pipeline corrosion |
| CN101832761A (en) * | 2010-04-30 | 2010-09-15 | 中国计量学院 | Micro-strain optical fibre sensing on-line monitoring device of high temperature pressure pipeline |
| CN201993321U (en) * | 2010-12-20 | 2011-09-28 | 天津亿利科能源科技发展股份有限公司 | Buried oil gas pipeline exterior corrosion real-time monitoring device based on optical fiber sensing |
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2010
- 2010-12-20 CN CN2010105963017A patent/CN102062730B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2567548Y (en) * | 2002-09-13 | 2003-08-20 | 西安石油学院 | Fibre-optical grating sensor for testing gas-oil pipe |
| CN2630841Y (en) * | 2003-06-18 | 2004-08-04 | 中国石油天然气集团公司 | Opticalfiber grating sensing and measuring system for oil-gas pipeline detection |
| WO2008017276A1 (en) * | 2006-08-04 | 2008-02-14 | Linping Ma | A distributed optical fiber warning and sensing system for oil and gas pipeline |
| CN101769442A (en) * | 2010-01-18 | 2010-07-07 | 大连理工大学 | Method for monitoring pipeline corrosion |
| CN101832761A (en) * | 2010-04-30 | 2010-09-15 | 中国计量学院 | Micro-strain optical fibre sensing on-line monitoring device of high temperature pressure pipeline |
| CN201993321U (en) * | 2010-12-20 | 2011-09-28 | 天津亿利科能源科技发展股份有限公司 | Buried oil gas pipeline exterior corrosion real-time monitoring device based on optical fiber sensing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016851A (en) * | 2012-12-06 | 2013-04-03 | 同济大学 | Smart pipeline with optical fiber sensing function and manufacturing method for smart pipeline |
| CN105890798A (en) * | 2016-06-12 | 2016-08-24 | 华电郑州机械设计研究院有限公司 | Distributed optical fiber corrosion detecting device for wet devulcanizing chimney |
| WO2020125305A1 (en) * | 2018-12-21 | 2020-06-25 | 宁波中车时代传感技术有限公司 | Series-connected integrated temperature and vibration sensor employing blazed grating and fiber bragg grating optical fiber |
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| CN102062730B (en) | 2013-06-19 |
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