CN2833523Y - Fiber grating sensor capable of simultaneously and respectively measuring pressure and temperature - Google Patents
Fiber grating sensor capable of simultaneously and respectively measuring pressure and temperature Download PDFInfo
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- CN2833523Y CN2833523Y CNU2005201270273U CN200520127027U CN2833523Y CN 2833523 Y CN2833523 Y CN 2833523Y CN U2005201270273 U CNU2005201270273 U CN U2005201270273U CN 200520127027 U CN200520127027 U CN 200520127027U CN 2833523 Y CN2833523 Y CN 2833523Y
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Abstract
The utility model relates to an optical fiber grating sensor capable of carrying out the simultaneous and diacritical measurement of pressure and temperature, which comprises a cantilever beam 3, an optical fiber 2, an optical fiber Bragg grating 1 and binding agent 5. The utility model is characterized in that the cantilever beam 3 is provided with a hole 4, the optical fiber Bragg grating 1 is directly written on the optical fiber 2, and the optical fiber 2, the optical fiber Bragg grating 1 are pasted on the cantilever beam 3 through the binding agent 5. Within the measurement range of the temperature of 20DEG C-100DEG C and the pressure of 0-800 gf (7.8N), reflected wave is detected by using an optical spectrum analyzer of which the resolution is 0.05 nm, the temperature resolution is 1.8 DEG C, and the pressure resolution is 0.5 N. Good linear relations are formed between the wave length shift amount of the central reflection of Bragg and the change of bandwidth expansion amount along with the temperature and the pressure. Linearities are higher than 99.6 percent, the wave mode of expansion by multiple measurement is stable and the repeatability is good.
Description
Technical field
The utility model belongs to the photoelectron technology field, be a kind ofly can distinguish simultaneously pressure and temperature in oil and gas pipes and the oil gas well, the fiber optical grating intelligent sensor of real-time online, permanent detection of dynamic.
Background technology
Fiber grating has caused that as a kind of novel sensor spare people extensively pay attention in recent years.This sensor removes to have general Fibre Optical Sensor and not to be subjected to Electromagnetic Interference, highly sensitive, in light weight, compact conformation, cost low, be suitable for outside the advantage that High Temperature High Pressure, corrosivity or risk environment use, it is strong and utilize wavelength-division multiplex technique to realize the unique advantage of multipoint multiplexing, the distributed discriminating measurement of many reference amounts on an optical fiber from relevant ability also to have intrinsic, has huge development potentiality.Pressure and temperature discriminating measurement sensor simultaneously have a wide range of applications in the industrial detection field.In conjunction with fiber grating intrinsic advantageous properties, develop fiber grating pressure and temperature while distinguishing sensor simple in structure, Nover practical and have important practical significance.
During the discriminating measurement sensor two Bragg optical grating constructions at present with different foveal reflex wavelength in design fiber grating pressure and temperature while, the conjugated polymer special packaging technology, make two grating pair pressure and the different sensitivities of temperature difference, according to Bragg reflection wavelength and pressure, vs. temperature, realize the measurement of testing pressure and temperature by measuring Bragg reflection wavelength drift value.Cause cross sensitivity owing to temperature and pressure cause simultaneously that the Bragg wavelength of fiber grating moves, how effectively to overcome the cross sensitivity effect and realize pressure and temperature the time discriminating measurement be the key that fiber grating sensing technology really moves towards practical application.At this problem, reported a lot of solutions both at home and abroad, comprise binary cycle FBG method, the LPG/FBG fusion method, different polymer encapsulated methods, different cladding diameter methods, fiber Bragg grating F-P chamber method, cantilever method writes the grating region point-score mixing on germanium and the B-Ge-codoped optical fiber.But these schemes have a common shortcoming, promptly need to adopt two or more gratings to make up and overcome the cross sensitivity problem, be difficult to guarantee the accuracy of measuring position, thereby influenced measuring accuracy that manufacture craft is also comparatively complicated when having increased cost.Meanwhile, segmentation scheme needs a plurality of demodulation light sources, and this makes troubles for practical application of fiber-optic grating sensor, and what have has then lost the peculiar Wavelength-encoding characteristic of fiber-optic grating sensor.
Summary of the invention
The purpose of this utility model provides the fiber-optic grating sensor of a kind of pressure and temperature while discriminating measurement, the optical fiber Bragg raster pressure-temperature sensor of this novelty, realize pressure and temperature discriminating measurement simultaneously by the single optical fiber grating, improve detection sensitivity, simplified structure, safe and reliable, overcome present fiber grating pressure and the temperature low problem of discriminating measurement precision simultaneously
The utility model is achieved in that
The utility model is achieved in that and comprises semi-girder 3, optical fiber 2, optical fiber Bragg raster 1, bonding agent 5, it is characterized in that having on the semi-girder 3 hole 4, optical fiber Bragg raster 1 directly writes on the optical fiber 2, and optical fiber 2, optical fiber Bragg raster 1 stick on the semi-girder 3 by bonding agent 5.
The utility model also adopts following technical scheme:
Optical fiber Bragg raster 1 center is pasted on the position that semi-girder 3 stress are concentrated.
Semi-girder 3 is selected the bigger metal material of thermal expansivity for use.
By changing optical fiber Bragg raster 1 location for paste semi-girder arc top thickness degree and pressure application point and optical fiber Bragg raster 1 distance, can adjust pressure measurement range and precision thereof in good time.
Know-why of the present utility model is: based on the linear broadening technology of optical fiber Bragg raster reflection wave, broadened bandwidth when utilizing its heterogeneous strain drive grating to make Bragg reflection wave wave length shift, and temperature only causes not broadening of reflection wave wave length shift, bandwidth, realizes the two parameters of monochromatic light grid temperature and pressure discriminating measurement simultaneously.
Advantage of the present utility model is:
This fiber-optic grating sensor can be realized the two-parameter multimetering of monochromatic light grid by optical fiber Bragg raster while discriminating measurement pressure and variation of temperature; In addition, by changing grating location for paste semi-girder arc top thickness degree and pressure application point and grating distance, can adjust pressure measurement range and precision thereof in good time; Meanwhile, utilize the higher metal material substrate of thermal expansivity to drive, the grating temperature response coefficient effectively improves, and has increased the accuracy of discriminating measurement.This system only needs single light source, and has kept the advantage of the Wavelength-encoding characteristic of fiber-optic grating sensor, and wave mode is stable, the precision height, and high temperature high voltage resistant, safe and reliable, the linearity and good reproducibility.Be easy to realize the distributed discriminating measurement of temperature, pressure, have good actual application and be worth.
Description of drawings:
Fig. 1: a kind of diplopore semi-girder fiber-optic grating sensor structural drawing;
Fig. 2: a kind of semi-girder fiber-optic grating sensor structural drawing.
Embodiment
As shown in Figure 1, the utility model comprises aluminium matter semi-girder 3, and silicon matrix is mixed germanium single-mode fiber 2, optical fiber Bragg raster 1.Have diplopore 4 on the semi-girder 3, rectangle connects between the diplopore 4, length of cantilever 50mm, wide 10mm, high 35mm, diplopore pitch-row 40mm, diplopore radius 15mm.Optical fiber Bragg raster 1 directly writes on silicon matrix and mixes on the germanium single-mode fiber 2, and single-mode fiber 2, optical fiber Bragg raster 1 stick on the semi-girder 3 by RTV silicon rubber bonder 5.
Optical fiber Bragg raster 1 center is over against the hole heart in hole, semi-girder 3 fixed arms, 6 one end garden, and promptly optical fiber Bragg raster 1 center is pasted on the position that semi-girder 3 stress are concentrated.
When semi-girder 3 free arms 7 add lateral pressure, heterogeneous strain takes place in the semi-girder 3 of pasting optical fiber Bragg raster 1 place, drive optical fiber Bragg raster 1 simultaneously heterogeneous strain takes place synchronously, broadened bandwidth when making the linear drift of optical fiber Bragg raster 1 reflection wave centre wavelength.When ambient temperature changes, only cause the optical fiber Bragg raster linear drift of 1 reflection wave centre wavelength and bandwidth broadening not, detect by the fiber grating signal demodulating system, draw the variation of pressure and temperature, discriminating measurement when realizing the two parameter of single fibre grating temperature, pressure.
By changing grating location for paste semi-girder arc top thickness degree and pressure application point and grating distance, can adjust pressure measurement range and precision thereof in addition in good time;
The utility model can also be implemented like this:
As shown in Figure 2, the utility model comprises aluminium matter semi-girder 3, silicon matrix Can single-mode fiber 2, optical fiber Bragg raster 1.Have hole 4 on the semi-girder 3, the hole 4 of close semi-girder 3 fixed arms 6 one ends is a garden shape, and the other end is a rectangle, length of cantilever 50mm, wide 10mm, high 35mm, garden pore radius 15mm, slot length 20mm.Optical fiber Bragg raster 1 directly writes on the silicon matrix Can single-mode fiber 2, and silicon matrix Can single-mode fiber 2, optical fiber Bragg raster 1 stick on the semi-girder 3 by RTV silicon rubber bonder 5.
Optical fiber Bragg raster 1 center is over against the hole heart in hole, semi-girder 3 fixed arms, 6 one end garden, and promptly optical fiber Bragg raster 1 center is pasted on the position that semi-girder 3 stress are concentrated.
When semi-girder 3 free arms 7 add lateral pressure, heterogeneous strain takes place in the semi-girder 3 of pasting optical fiber Bragg raster 1 place, drive optical fiber Bragg raster 1 simultaneously heterogeneous strain takes place synchronously, broadened bandwidth when making the linear drift of optical fiber Bragg raster 1 reflection wave centre wavelength.When ambient temperature changes, only cause the optical fiber Bragg raster linear drift of 1 reflection wave centre wavelength and bandwidth broadening not, detect by the fiber grating signal demodulating system, draw the variation of pressure and temperature, discriminating measurement when realizing the two parameter of single fibre grating temperature, pressure.
By changing grating location for paste semi-girder arc top thickness degree and pressure application point and grating distance, can adjust pressure measurement range and precision thereof in addition in good time.
Claims (4)
1, the fiber-optic grating sensor of a kind of pressure and temperature while discriminating measurement, comprise semi-girder (3), optical fiber (2), optical fiber Bragg raster (1), bonding agent (5), it is characterized in that: have hole (4) on the semi-girder (3), optical fiber (2) is provided with optical fiber Bragg raster (1), and optical fiber (2), optical fiber Bragg raster (1) stick on the semi-girder (3) by bonding agent (5).
2, the fiber-optic grating sensor of a kind of pressure according to claim 1 and temperature while discriminating measurement, it is characterized in that: optical fiber Bragg raster (1) center is pasted on the position that semi-girder (3) stress is concentrated.
3, the fiber-optic grating sensor of a kind of pressure according to claim 1 and temperature while discriminating measurement is characterized in that: hole (4) or single hole, or diplopore.
4, the fiber-optic grating sensor of a kind of pressure according to claim 1 and temperature while discriminating measurement is characterized in that: optical fiber Bragg raster (1) location for paste semi-girder arc top thickness degree and pressure application point and optical fiber Bragg raster 1 distance variable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201270273U CN2833523Y (en) | 2005-09-29 | 2005-09-29 | Fiber grating sensor capable of simultaneously and respectively measuring pressure and temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201270273U CN2833523Y (en) | 2005-09-29 | 2005-09-29 | Fiber grating sensor capable of simultaneously and respectively measuring pressure and temperature |
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| CN2833523Y true CN2833523Y (en) | 2006-11-01 |
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| CNU2005201270273U Expired - Fee Related CN2833523Y (en) | 2005-09-29 | 2005-09-29 | Fiber grating sensor capable of simultaneously and respectively measuring pressure and temperature |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100514014C (en) * | 2006-12-13 | 2009-07-15 | 中国科学院半导体研究所 | Optical fiber pipe hydraulic sensor |
| CN101793573A (en) * | 2010-03-26 | 2010-08-04 | 昆明理工大学 | FBG on-line monitoring method of pressure pipeline |
| CN101178007B (en) * | 2007-12-07 | 2011-03-02 | 北京蔚蓝仕科技有限公司 | Diaphragm-type optical-fiber intelligent well pressure and temperature sensing unit |
| CN101324189B (en) * | 2008-07-28 | 2011-12-21 | 西安石油大学 | External pressure type temperature compensation high-temperature high-pressure optical fiber grating sensor |
| CN101324188B (en) * | 2008-07-28 | 2012-05-02 | 西安石油大学 | Inner pressure type temperature compensation high-temperature high-pressure optical fiber grating sensor |
| CN101397903B (en) * | 2008-11-05 | 2012-08-29 | 大庆油田有限责任公司 | Method for monitoring sleeve circumferential strain by using optical fibre grating sensor |
| CN103953330A (en) * | 2014-04-02 | 2014-07-30 | 北京博简复才技术咨询有限公司 | Deep well hydrocarbon reservoir temperature and pressure on-line integrated monitoring device and method |
| CN105841878A (en) * | 2016-05-17 | 2016-08-10 | 中国电子科技集团公司第八研究所 | High temperature resistance fiber bragg grating pressure sensor |
| CN106153124A (en) * | 2016-09-13 | 2016-11-23 | 成都创慧科达科技有限公司 | A kind of optical fiber temperature and pressure integrative sensor |
| CN108414031A (en) * | 2018-06-11 | 2018-08-17 | 中国计量大学 | A kind of mid-infrared light fiber sensor that many reference amounts measure |
| CN109441434A (en) * | 2018-12-19 | 2019-03-08 | 常州艾控智能仪表有限公司 | Multi-parameter measuring systems under photoelectricity combined shaft |
| CN111197478A (en) * | 2018-10-30 | 2020-05-26 | 中石化石油工程技术服务有限公司 | Optical fiber differential pressure flow logging system and logging method thereof |
-
2005
- 2005-09-29 CN CNU2005201270273U patent/CN2833523Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100514014C (en) * | 2006-12-13 | 2009-07-15 | 中国科学院半导体研究所 | Optical fiber pipe hydraulic sensor |
| CN101178007B (en) * | 2007-12-07 | 2011-03-02 | 北京蔚蓝仕科技有限公司 | Diaphragm-type optical-fiber intelligent well pressure and temperature sensing unit |
| CN101324189B (en) * | 2008-07-28 | 2011-12-21 | 西安石油大学 | External pressure type temperature compensation high-temperature high-pressure optical fiber grating sensor |
| CN101324188B (en) * | 2008-07-28 | 2012-05-02 | 西安石油大学 | Inner pressure type temperature compensation high-temperature high-pressure optical fiber grating sensor |
| CN101397903B (en) * | 2008-11-05 | 2012-08-29 | 大庆油田有限责任公司 | Method for monitoring sleeve circumferential strain by using optical fibre grating sensor |
| CN101793573A (en) * | 2010-03-26 | 2010-08-04 | 昆明理工大学 | FBG on-line monitoring method of pressure pipeline |
| CN103953330A (en) * | 2014-04-02 | 2014-07-30 | 北京博简复才技术咨询有限公司 | Deep well hydrocarbon reservoir temperature and pressure on-line integrated monitoring device and method |
| CN103953330B (en) * | 2014-04-02 | 2016-09-14 | 北京博简复才技术咨询有限公司 | Deep-well oil-gas Layer temperature and pressure Online integration monitoring device and method |
| CN105841878A (en) * | 2016-05-17 | 2016-08-10 | 中国电子科技集团公司第八研究所 | High temperature resistance fiber bragg grating pressure sensor |
| CN106153124A (en) * | 2016-09-13 | 2016-11-23 | 成都创慧科达科技有限公司 | A kind of optical fiber temperature and pressure integrative sensor |
| CN108414031A (en) * | 2018-06-11 | 2018-08-17 | 中国计量大学 | A kind of mid-infrared light fiber sensor that many reference amounts measure |
| CN108414031B (en) * | 2018-06-11 | 2024-02-09 | 中国计量大学 | Multi-parameter measurement mid-infrared optical fiber sensor |
| CN111197478A (en) * | 2018-10-30 | 2020-05-26 | 中石化石油工程技术服务有限公司 | Optical fiber differential pressure flow logging system and logging method thereof |
| CN109441434A (en) * | 2018-12-19 | 2019-03-08 | 常州艾控智能仪表有限公司 | Multi-parameter measuring systems under photoelectricity combined shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061101 Termination date: 20100929 |