CN102243347A - Open type induction optical fiber - Google Patents
Open type induction optical fiber Download PDFInfo
- Publication number
- CN102243347A CN102243347A CN 201110199779 CN201110199779A CN102243347A CN 102243347 A CN102243347 A CN 102243347A CN 201110199779 CN201110199779 CN 201110199779 CN 201110199779 A CN201110199779 A CN 201110199779A CN 102243347 A CN102243347 A CN 102243347A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- keeper
- overcoat
- open induction
- location structure
- 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.)
- Granted
Links
Images
Abstract
The invention relates to an open type induction optical fiber. According to the technical scheme provided by the invention, the open type induction optical fiber comprises an optical fiber used for detecting environment strain change and is characterized in that a jacket of the optical fiber is shaped as a hollow tube, the pipe wall of the jacket of the optical fiber is provided with an opening along the axial direction, and the opening is communicated with an inner cavity of the jacket of the optical fiber; and the optical fiber is fixed in the inner cavity of the jacket of the optical fiber through a plurality of positioning members. According to the invention, influence of the jacket outside the optical fiber to the environment change detection can be avoided, environment strain change, temperature change and gas accumulation in a pipeline can be accurately detected, and pipeline bursting and gas or oil loss in the pipeline are prevented.
Description
Technical field
The present invention relates to a kind of optical fiber, especially a kind of open induction optical fiber belongs to optical fiber induction field.
This kind optical fiber can be long apart from having dense the contact with the outer room environment under the situation, and this kind contact can monitor stress, temperature and chemical reaction.
Background technology
For the measurement of structural strain, what extensively adopt traditionally is strain-ga(u)ge technique, and this is a very proven technique, but its defective is also known altogether.Because what it extracted is electric signal, therefore be easy to be subjected to the interference of peripheral electromagnetic field.Moreover, because oil and gas pipeline is short then tens kilometers, long then hundreds of, thousands of kilometer, it to or be buried under the ground, perhaps pass through the depopulated zone of awful weather, the environment of underground humidity, and the impermanence of ambient humidity, temperature changes the electric signal of all foil gauge being gathered and produces greatly and disturb, even wrong information is provided.What is worse, foil gauge has only long (being called " point " formula sensor) about one centimetre, it can only survey the strain variation of extremely narrow one section oil and gas pipes, with respect to oil and gas pipes hundreds of, thousands of kilometers, only survey several sections oil and gas pipes, and miss the detection of most oil and gas pipes; Thousands of foil gauges are installed, and this economically can be extremely expensive, technical also infeasible.
Be accompanied by the development of Fibre Optical Communication Technology, fiber optic sensor technology also arises at the historic moment.What Fibre Optical Sensor was different from that one of distinguishing feature of strain-ga(u)ge technique is that Fibre Optical Sensor extracts is light signal, and Fibre Optical Sensor just can not be subjected to the interference of peripheral electromagnetic field like this.Because light signal is to be constrained on transmission in the optical fiber, rugged surroundings not only are not to disturb so on every side, and temperature and strain variation on the oil and gas pipeline that Fibre Optical Sensor can cause surrounding environment change detect.
Existing fiber can't be put this kind optical fiber shop in the pipeline of long distance owing to its diameter less than normal, intensity and its fragility, or in the wall of hillside, dam.Existing optical fiber is as passing on communication signal to receiver, the outside of this kind optical fiber is to wrap polyester, nylon, rubber or added metal overcoat, this kind is as the optical fiber of communication apparatus, main consideration is interference, solar heat protection, moistureproof impaired or fracture, yet mainly consider as the optical fiber that detects to be and the contacting of the external world, also have optical fiber essential stretching under applied environment, have at this kind under the situation of tension force, optical fiber can be discovered the variation of stress, temperature and chemical reaction.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of open induction optical fiber be provided, can overcome the influence that the outer overcoat of optical fiber detects environmental change,
According to technical scheme provided by the invention, described open induction optical fiber comprises the optical fiber that is used for the testing environment strain variation, it is characterized in that: described optical fiber overcoat is hollow tubular, tube wall upper edge at the optical fiber overcoat is axially arranged with opening, and described opening is communicated with the inner chamber of described optical fiber overcoat; Described optical fiber is fixed in the inner chamber of optical fiber overcoat by several keepers.
Described keeper comprises first location structure that is used for positioning optical waveguides that is positioned at the keeper axial centre, and be convenient to optical fiber is put into the guide frame of first location structure and second location structure that is used for keeper is positioned at the optical fiber overcoat that is positioned at the keeper edge.
Described first location structure is a pass structure; Described guide frame is a trench structure; Described pass structure and trench structure be axially laying along keeper all.
Described second location structure is the locating surface that is arranged at the peripheral surface of keeper.Described locating surface is the circular orientation face.Described locating surface is roughly identical with the inwall of optical fiber overcoat.
Described keeper is the cylindricality keeper, is provided with the pilot hole that is used to place optical fiber at the center of cylindricality keeper, is provided with to be communicated with pilot hole and extraneous axially open on the cylindricality keeper.
Described keeper adopts mixed fibre, rubber or the plastic material of wool fiber, cotton fiber, wool and cotton to make.Described optical fiber overcoat adopts stainless steel, carbon steel, copper, aldary, lead or lead alloy to make.
The influence that the present invention can avoid the outer overcoat of optical fiber that environmental change is detected, the change of the STRESS VARIATION of testing environment, temperature and gas prevent pipeline burst in ducted accumulation accurately, and gas or oily in ducted loss.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of keeper of the present invention.
Embodiment
The invention will be further described below in conjunction with concrete accompanying drawing.
As Fig. 1 ~ shown in Figure 2: open induction optical fiber comprises optical fiber 1, optical fiber overcoat 2, keeper 3, pilot hole 4 etc.
The present invention includes the optical fiber 1 that is used for the testing environment strain variation, it is characterized in that: described optical fiber overcoat 2 is hollow tubular, is axially arranged with opening 6 in the tube wall upper edge of optical fiber overcoat 2, and described opening 6 is communicated with the inner chamber of described optical fiber overcoat 2; Described optical fiber 1 is fixed in the inner chamber of optical fiber overcoat 2 by several keepers 3.
Described keeper 3 comprises first location structure that is used for positioning optical waveguides 1 that is positioned at the keeper axial centre, and be convenient to optical fiber 1 is put into the guide frame of first location structure and second location structure that is used for keeper 3 is positioned at optical fiber overcoat 2 that is positioned at keeper 3 edges.
Described first location structure is a pass structure; Described guide frame is a trench structure; Described pass structure and trench structure be axially laying along keeper 3 all.
Described second location structure is the locating surface that is arranged at the peripheral surface of keeper 3.Described locating surface is the circular orientation face, and described locating surface is roughly identical with the inwall of optical fiber overcoat 2.
Perhaps as shown in Figure 2: described keeper 3 is the cylindricality keeper, is provided with the pilot hole 4 that is used to place optical fiber 1 at the center of cylindricality keeper, is provided with to be communicated with pilot hole 4 and extraneous axially open 5 on the cylindricality keeper.
Described keeper 4 can adopt mixed fibre, rubber or the plastic material of wool fiber, cotton fiber, wool and cotton to make.Described optical fiber overcoat 2 can adopt stainless steel, carbon steel, copper, aldary, lead or lead alloy to make.
Open induction optical fiber of the present invention adopts has open optical fiber overcoat 2, the influence that can avoid the outer cover of optical fiber that environmental change is detected, the change of the STRESS VARIATION of testing environment, temperature accurately.Open induction optical fiber of the present invention can be used for detecting the burn into oil and gas pipes flexing of oil and gas pipes and the artificial destruction that detects oil and gas pipes.The space accuracy of detection of open induction optical fiber of the present invention is lower than 5 centimetres, and the temperature monitoring scope is-270 ~ 800 ℃, and the strain monitoring scope is-2% ~ 3%, and temperature measurement accuracy is ± 0.1 ℃.
Claims (9)
1. open induction optical fiber, comprise the optical fiber (1) that is used for the testing environment strain variation, it is characterized in that: described optical fiber overcoat (2) is hollow tubular, be axially arranged with opening (6) in the tube wall upper edge of optical fiber overcoat (2), described opening (6) is communicated with the inner chamber of described optical fiber overcoat (2); Described optical fiber (1) is fixed in the inner chamber of optical fiber overcoat (2) by several keepers (3).
2. open induction optical fiber as claimed in claim 1, it is characterized in that: described keeper (3) comprises first location structure that is used for positioning optical waveguides (1) that is positioned at the keeper axial centre, and be convenient to optical fiber (1) is put into the guide frame of first location structure, and second location structure that is used for keeper (3) is positioned at optical fiber overcoat (2) that is positioned at keeper (3) edge.
3. open induction optical fiber as claimed in claim 2 is characterized in that: described first location structure is a pass structure; Described guide frame is a trench structure; Described pass structure and trench structure be axially laying along keeper (3) all.
4. open induction optical fiber as claimed in claim 2 is characterized in that: described second location structure is the locating surface that is arranged at the peripheral surface of keeper (3).
5. open induction optical fiber as claimed in claim 4 is characterized in that: described locating surface is the circular orientation face.
6. as claim 4 or 5 described open induction optical fiber, it is characterized in that: described locating surface is roughly identical with the inwall of optical fiber overcoat (2).
7. open induction optical fiber as claimed in claim 1, it is characterized in that: described keeper (3) is the cylindricality keeper, be provided with the pilot hole (4) that is used to place optical fiber (1) at the center of cylindricality keeper, on the cylindricality keeper, be provided with the axially open (5) that is communicated with the pilot hole (4) and the external world.
8. open induction optical fiber as claimed in claim 1 is characterized in that: described keeper (4) adopts mixed fibre, rubber or the plastic material of wool fiber, cotton fiber, wool and cotton to make.
9. open induction optical fiber as claimed in claim 1 is characterized in that: described optical fiber overcoat (2) adopts stainless steel, carbon steel, copper, aldary, lead or lead alloy to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110199779 CN102243347B (en) | 2011-07-16 | 2011-07-16 | Open type induction optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110199779 CN102243347B (en) | 2011-07-16 | 2011-07-16 | Open type induction optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102243347A true CN102243347A (en) | 2011-11-16 |
| CN102243347B CN102243347B (en) | 2013-01-23 |
Family
ID=44961499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110199779 Active CN102243347B (en) | 2011-07-16 | 2011-07-16 | Open type induction optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102243347B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4355863A (en) * | 1977-09-30 | 1982-10-26 | Siemens Aktiengesellschaft | Cladded optical fiber having a longitudinal side coupling zone |
| JPH05322690A (en) * | 1992-02-21 | 1993-12-07 | Sumitomo Electric Ind Ltd | Optical fiber for detecting leaked liquid |
| CN1688910A (en) * | 2002-08-16 | 2005-10-26 | 毫微精密产品股份有限公司 | High precision optical fiber alignment components |
| JP2008175560A (en) * | 2007-01-16 | 2008-07-31 | Fujikura Ltd | Optical fiber sensor cable |
| CN101617210A (en) * | 2007-02-27 | 2009-12-30 | 康宁股份有限公司 | Optical waveguide environmental sensor and manufacture method |
-
2011
- 2011-07-16 CN CN 201110199779 patent/CN102243347B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4355863A (en) * | 1977-09-30 | 1982-10-26 | Siemens Aktiengesellschaft | Cladded optical fiber having a longitudinal side coupling zone |
| JPH05322690A (en) * | 1992-02-21 | 1993-12-07 | Sumitomo Electric Ind Ltd | Optical fiber for detecting leaked liquid |
| CN1688910A (en) * | 2002-08-16 | 2005-10-26 | 毫微精密产品股份有限公司 | High precision optical fiber alignment components |
| JP2008175560A (en) * | 2007-01-16 | 2008-07-31 | Fujikura Ltd | Optical fiber sensor cable |
| CN101617210A (en) * | 2007-02-27 | 2009-12-30 | 康宁股份有限公司 | Optical waveguide environmental sensor and manufacture method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102243347B (en) | 2013-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104482331B (en) | A kind of intelligence RTP and preparation method thereof | |
| CN1712919A (en) | Positioning distributed fibre-optical temperature sensing monitor and method for pipeline leakage | |
| CN109238532A (en) | Pipeline stress analysis method and system based on optical fiber Brillouin scattering light | |
| CN101696639A (en) | Fiber mine water inrush precursor information monitor | |
| CN103821507A (en) | Method for detecting deformation of shaft wall of vertical shaft through distributed optical fibers | |
| GB2457277A (en) | Methods and apparatuses for detecting strain in structures | |
| CN102914289A (en) | Brillouin distributed optical fiber sensing based structural deflection and subsidence monitoring system | |
| KR20160120459A (en) | System for checking leakage of underground pipe | |
| CN103033139A (en) | Measuring device for brillouin optical sensing type continuous multipoint displacement meter | |
| CN109443425B (en) | Long-distance heat-preservation conveying pipeline deformation and leakage monitoring system | |
| KR101135513B1 (en) | Optical fiber sensor for measurement of fire and movements | |
| CN113781749A (en) | Underground pipe gallery internal pipeline leakage positioning and early warning device, system and method | |
| CN102243347B (en) | Open type induction optical fiber | |
| CN106770481B (en) | Bridge sling monitoring sensor | |
| CN110424362B (en) | Optical fiber type temperature self-compensating static sounding sensor | |
| CN202401396U (en) | Intelligent cable capable of sensing internal humidity for bridge | |
| CN104457690A (en) | Sensing rod for monitoring building settlement and monitoring method using the same | |
| CN201266096Y (en) | Optical fiber grating hydraulic osmotic pressure sensor | |
| CN102062730B (en) | Buried oil pipeline external-corrosion real-time monitoring device based on optical fiber sensor | |
| CN203083529U (en) | Brillouin optical sensing type continuous multi-point displacement meter measurement apparatus | |
| CN202024852U (en) | Fiber grating air pressure sensor | |
| KR101698835B1 (en) | Displacement measurement system using optical fiber | |
| CN203223216U (en) | Distributed optical cable whole course online stress detector for under well casing strings of oil and gas wells | |
| Inaudi et al. | Distributed fiber-optic sensing for long-range monitoring of pipelines | |
| CN201429460Y (en) | Mining optical fiber grating vibration sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |