CN101298980A - Design method and manufacturing technique of high-sensitivity temperature self-compensation optical fiber grating strain sensor - Google Patents
Design method and manufacturing technique of high-sensitivity temperature self-compensation optical fiber grating strain sensor Download PDFInfo
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- CN101298980A CN101298980A CN 200810104456 CN200810104456A CN101298980A CN 101298980 A CN101298980 A CN 101298980A CN 200810104456 CN200810104456 CN 200810104456 CN 200810104456 A CN200810104456 A CN 200810104456A CN 101298980 A CN101298980 A CN 101298980A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 title description 4
- 230000035945 sensitivity Effects 0.000 claims abstract description 5
- 239000000835 fiber Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
-
- 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
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
The invention provides a designing method and processing technology of the high sensitivity temperature compensation optical fiber grate strain transducer, which connects the optical fiber grate with a stick in series. The shape change generated when the temperature of the stick changes is used to make the strain of the grate change, to compensate the grate calorescence change caused by the temperature change, to make the returning wavelength of the grate not affected by the temperature change, which is decided by the strain of the object to be measured. Hence, through mearuring the wavelength of the sensor, the strain change can be obtained. Meanwhile, the sensor has simple structure and convenient usage.
Description
One, technical field
The present invention relates to Fibre Optical Sensor, especially the method for designing of optical fiber grating temperature compensation strain transducer and manufacture craft.
Two, technical background
Fiber grating has the incomparable advantage of many other sensors as novel sensing element: full photo measure at the on-the-spot no electrical equipment of monitoring, is not disturbed by electromagnetism and nuclear radiation; Measured with catoptrical centre wavelength sign, be not subjected to the influence of factors such as light source power fluctuation, optical fiber micro-bending effect and coupling loss; Absolute magnitude is measured, and need not calibration in system's installation and the long-term use; Long service life or the like.
Fiber Bragg grating strain sensor is widely-used in industries such as bridge, buildings.Yet fiber grating has caused the temperature drift of fiber Bragg grating strain sensor to the characteristic of temperature and strain cosensitize.In order to address this problem, the researchist has carried out extensive work.M.G.Xu equals to propose to utilize dual wavelength to measure temperature and strain simultaneously on the Electron.Lett. periodical in 1994, and then the strain result is carried out temperature compensation, to solve the temperature drift of fiber Bragg grating strain sensor.Other achievement in research mostly also is to adopt diverse ways to measure temperature and strain simultaneously, and then the strain result is carried out temperature compensation.But temperature strain is measured simultaneously and is made system complex, require to use particular components, and resultant error is bigger.
Therefore, develop a kind of automatic temperature compensation strain transducer and just seem very meaningful at this.
Three, summary of the invention
The present invention is to provide a kind of method for designing and manufacture craft of high-sensitivity temperature self-compensation optical fiber grating strain sensor.The structure of this sensor is shown in Figure of description.Fiber grating and one rod is connected, and then their free end is fixed to the object of strain to be measured.In the time of fixedly, make fiber grating have certain dependent variable.When temperature variation, the excellent length of connecting with fiber grating changes, and makes the length of fiber grating produce the variation of opposite sign but equal magnitude.Select by reasonable parameter, the length variations of fiber grating causes returns wavelength variations and can offset the variation that the grating thermo-optical coeffecient that causes because of temperature variation produces, thereby make grating return wavelength and be not subjected to influence of temperature change that only the strain by object under test determines.Therefore, only by to the i.e. strain variation as can be known of the wavelength measurement of this sensor.Simultaneously, this sensor construction is simple, and is easy to use.
Provide each parameter selection method of this sensor below.
The fiber grating that temperature and strain variation cause returns wavelength variable quantity:
Δλ
B＝λ
B(1-P
e)Δε
FBG+λ
B*ξ*ΔT (1)
Wherein, P
e(≈ 0.22) is bullet light constant, and ξ is a thermo-optical coeffecient, and Δ T is the variation of ambient temperature amount, Δ ε
FBGBe the strain variation of fiber grating.
In the structure as shown in Figure 1 that we propose, the strain variation of fiber grating is:
Δε
FBG＝Δd/d＝[Δ(d+L)-ΔL]/d
＝(d+L)/d*Δ(d+L)/(d+L)-L/d*ΔL/L
＝(d+L)/d*Δε
m-L/d*Δε
l
＝(d+L)/d*Δε
m-L/d*α*ΔT (2)
Wherein d is the distance between two affixed points of fiber grating, and L is the length of the rod of connecting with fiber grating, Δ ε
mBe the strain variation of object under test, Δ ε
lThe strain variation of the rod of this series connection, α is the thermal expansivity of the rod of this series connection.
(2) formula substitution (1) formula, can get fiber grating and return wavelength variable quantity and be:
Δλ
B＝λ
B(1-P
e)[(d+L)/d*Δε
m-L/d*α*ΔT]+λ
B*ξ*ΔT
。
＝λ
B(1-P
e)(d+L)/d*Δε
m+λ
B*[ξ-(1-P
e)L/d*α]*ΔT
As ξ-(1-P
e) L/d* α=0, promptly work as the length L=ξ * d/[α (1-P of the rod of this series connection
e)] time, have:
Δλ
B＝λ
B(1-P
e)(d+L)/d*Δε
m (3)
At this moment, temperature variation causes that no longer fiber grating returns the variation of wavelength variable quantity, and the strain variation of testee has been exaggerated (d+L)/d doubly when passing to fiber grating
Four, description of drawings
Accompanying drawing is a structural representation of the present invention.
Wherein, 1 is fiber grating, and 2 is the rod of connecting with fiber grating, 3 point of fixity, and 4 is strain object to be measured, 5 is flange.
Five, specific embodiments
Below in conjunction with for example the present invention being done more detailed description:
The making and the installation that divide following step to introduce sensor:
L＝ξ*d/[α(1-P
e)]＝0.39d。
Strain sensitivity has increased by 1.39 times, for: Δ λ
B/ Δ ε
m=1.39 λ
B(1-P
e)=1.68pm/ustrain
Can be by selecting the rod of different material series connection for use, according to L=ξ * d/[α (1-P
e)] its length of corresponding change, when realizing auto thermal compensation, to realize different strain sensitivities.
Claims (3)
1. the high-sensitivity temperature self-compensation optical fiber grating strain sensor method for designing is characterized by: return wavelength variable quantity
Δλ
B＝λ
B(1-P
e)(d+L)/d*Δε
m。
2. according to the described structure of claim 1, it is characterized in that: strain sensitivity increases to (d+L)/d doubly.
3. according to the described structure of claim 1, it is characterized in that: the pass of the length of the rod of connecting with fiber grating and this excellent thermal expansivity is L=ξ * d/[α (1-P
e)].Can be by selecting the rod of different material series connection for use, its length of corresponding change is to reach the purpose that realizes different strain sensitivities when realizing auto thermal compensation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810104456 CN101298980A (en) | 2008-04-18 | 2008-04-18 | Design method and manufacturing technique of high-sensitivity temperature self-compensation optical fiber grating strain sensor |
| PCT/IB2009/051581 WO2009128040A1 (en) | 2008-04-18 | 2009-04-16 | A high sensitive fiber bragg grating strain sensor with automatic temperature compensation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810104456 CN101298980A (en) | 2008-04-18 | 2008-04-18 | Design method and manufacturing technique of high-sensitivity temperature self-compensation optical fiber grating strain sensor |
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| Publication Number | Publication Date |
|---|---|
| CN101298980A true CN101298980A (en) | 2008-11-05 |
Family
ID=40078879
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|---|---|---|---|
| CN 200810104456 Pending CN101298980A (en) | 2008-04-18 | 2008-04-18 | Design method and manufacturing technique of high-sensitivity temperature self-compensation optical fiber grating strain sensor |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009128040A1 (en) * | 2008-04-18 | 2009-10-22 | Institute Of Crustal Dynamics, China Earthquake Administration | A high sensitive fiber bragg grating strain sensor with automatic temperature compensation |
| CN102313561A (en) * | 2010-06-29 | 2012-01-11 | 马克西姆综合产品公司 | The self-correcting electronic sensor |
| CN103411725A (en) * | 2013-07-26 | 2013-11-27 | 中国船舶重工集团公司第七一五研究所 | Temperature synchronous response double grating pressure sensor and preparation method thereof |
| CN105115438A (en) * | 2015-08-16 | 2015-12-02 | 北京航空航天大学 | An optical fiber sensing system temperature compensating method |
| CN105333833A (en) * | 2015-10-27 | 2016-02-17 | 北京航空航天大学 | Temperature-independent fiber bragg grating strain sensor |
| CN106706160A (en) * | 2016-12-29 | 2017-05-24 | 电子科技大学 | Optical fiber Fabry-Perot sensor-based temperature compensation system and method |
| CN108139237A (en) * | 2015-09-21 | 2018-06-08 | 福斯4X股份有限公司 | Light guide clamping device, fibre optical sensor and its manufacturing method |
| CN108139236A (en) * | 2015-09-21 | 2018-06-08 | 福斯4X股份有限公司 | Sensor patch and its method for manufacturing sensor patch |
| CN109541258A (en) * | 2018-12-22 | 2019-03-29 | 蚌埠学院 | Optical fibre grating acceleration and strain transducer and detection method |
| CN110823120A (en) * | 2019-12-13 | 2020-02-21 | 大连理工大学 | Compensation method for measurement error of surface-mounted fiber grating strain sensor |
| CN111457857A (en) * | 2020-06-04 | 2020-07-28 | 东北林业大学 | Optical fiber sensor belt capable of realizing multi-point bending detection |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2295946A1 (en) | 2009-09-11 | 2011-03-16 | Fibersensing - Sistemas Avançados de Monitorização S.A. | Athermal fiber bragg grating strain gauge |
| RU2530466C1 (en) * | 2013-07-09 | 2014-10-10 | Общество с ограниченной ответственностью "ФИРМА ПОДИЙ" ООО "ФИРМА ПОДИЙ" | Strain-gauge converter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2105605A1 (en) * | 1993-09-07 | 1995-03-08 | Zhuo Jun Lu | Fiber optic sensor system for strain and temperature measurement |
| US6144789A (en) * | 1999-05-25 | 2000-11-07 | Lucent Technologies Inc. | Temperature compensating device for fiber gratings and a package therefor |
| JP2004170168A (en) * | 2002-11-19 | 2004-06-17 | Ntt Advanced Technology Corp | Strain sensor |
| CN2636238Y (en) * | 2003-07-03 | 2004-08-25 | 香港理工大学 | Cement structure strain measuring sensor with temp. compensation |
| EP1709416B1 (en) * | 2004-01-23 | 2018-03-07 | LM Wind Power International Technology II ApS | Device including a system adapted for use in temperature compensation of strain measurements in fibre-reinforced structures |
| CN101298980A (en) * | 2008-04-18 | 2008-11-05 | 中国地震局地壳应力研究所 | Design method and manufacturing technique of high-sensitivity temperature self-compensation optical fiber grating strain sensor |
-
2008
- 2008-04-18 CN CN 200810104456 patent/CN101298980A/en active Pending
-
2009
- 2009-04-16 WO PCT/IB2009/051581 patent/WO2009128040A1/en active Application Filing
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009128040A1 (en) * | 2008-04-18 | 2009-10-22 | Institute Of Crustal Dynamics, China Earthquake Administration | A high sensitive fiber bragg grating strain sensor with automatic temperature compensation |
| CN102313561A (en) * | 2010-06-29 | 2012-01-11 | 马克西姆综合产品公司 | The self-correcting electronic sensor |
| CN102313561B (en) * | 2010-06-29 | 2016-03-30 | 马克西姆综合产品公司 | Self-correcting electronic sensor |
| CN103411725A (en) * | 2013-07-26 | 2013-11-27 | 中国船舶重工集团公司第七一五研究所 | Temperature synchronous response double grating pressure sensor and preparation method thereof |
| CN103411725B (en) * | 2013-07-26 | 2015-07-08 | 中国船舶重工集团公司第七一五研究所 | Temperature synchronous response double grating pressure sensor and preparation method thereof |
| CN105115438A (en) * | 2015-08-16 | 2015-12-02 | 北京航空航天大学 | An optical fiber sensing system temperature compensating method |
| CN105115438B (en) * | 2015-08-16 | 2017-10-17 | 北京航空航天大学 | A kind of optical fiber sensing system temperature compensation |
| US10684145B2 (en) | 2015-09-21 | 2020-06-16 | fos4X GmbH | Sensor patch and method for producing a sensor patch |
| US10761261B2 (en) | 2015-09-21 | 2020-09-01 | fos4X GmbH | Light guide clamping device, fiber optic sensor and production method |
| CN108139237A (en) * | 2015-09-21 | 2018-06-08 | 福斯4X股份有限公司 | Light guide clamping device, fibre optical sensor and its manufacturing method |
| CN108139236A (en) * | 2015-09-21 | 2018-06-08 | 福斯4X股份有限公司 | Sensor patch and its method for manufacturing sensor patch |
| CN105333833A (en) * | 2015-10-27 | 2016-02-17 | 北京航空航天大学 | Temperature-independent fiber bragg grating strain sensor |
| CN105333833B (en) * | 2015-10-27 | 2018-11-02 | 北京航空航天大学 | The unrelated fiber Bragg grating strain sensor of temperature |
| CN106706160A (en) * | 2016-12-29 | 2017-05-24 | 电子科技大学 | Optical fiber Fabry-Perot sensor-based temperature compensation system and method |
| CN109541258A (en) * | 2018-12-22 | 2019-03-29 | 蚌埠学院 | Optical fibre grating acceleration and strain transducer and detection method |
| CN109541258B (en) * | 2018-12-22 | 2023-10-17 | 蚌埠学院 | Fiber Bragg grating acceleration and strain sensor and detection method |
| CN110823120A (en) * | 2019-12-13 | 2020-02-21 | 大连理工大学 | Compensation method for measurement error of surface-mounted fiber grating strain sensor |
| CN110823120B (en) * | 2019-12-13 | 2020-08-14 | 大连理工大学 | Compensation method for measurement error of surface-mounted fiber grating strain sensor |
| CN111457857A (en) * | 2020-06-04 | 2020-07-28 | 东北林业大学 | Optical fiber sensor belt capable of realizing multi-point bending detection |
| CN111457857B (en) * | 2020-06-04 | 2024-09-27 | 东北林业大学 | Optical fiber sensor belt capable of realizing multi-point bending detection |
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| Publication number | Publication date |
|---|---|
| WO2009128040A1 (en) | 2009-10-22 |
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