CN106546354B - A kind of superelevation temperature sensor based on FBG - Google Patents
A kind of superelevation temperature sensor based on FBG Download PDFInfo
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- CN106546354B CN106546354B CN201610953668.7A CN201610953668A CN106546354B CN 106546354 B CN106546354 B CN 106546354B CN 201610953668 A CN201610953668 A CN 201610953668A CN 106546354 B CN106546354 B CN 106546354B
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- alumina ceramic
- aluminium oxide
- fbg
- temperature sensor
- fiber grating
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 173
- 239000000919 ceramic Substances 0.000 claims abstract description 49
- 239000000835 fiber Substances 0.000 claims abstract description 41
- 230000001681 protective effect Effects 0.000 claims abstract description 36
- 239000003292 glue Substances 0.000 claims abstract description 17
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 14
- 239000010935 stainless steel Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 239000013307 optical fiber Substances 0.000 claims description 7
- 239000011214 refractory ceramic Substances 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Optical Transform (AREA)
Abstract
The present invention provides a kind of superelevation temperature sensor based on FBG, wherein the superelevation temperature sensor based on FBG includes: APC fibre-optical splice, aluminium oxide ceramics stick, stainless steel bar, fiber grating, metal spring and aluminium oxide ceramics protective case；The APC fibre-optical splice is connected by the refractory ceramics glue with the aluminium oxide protective case; one end of the fiber grating is fixed on the free end of the aluminium oxide ceramics stick; the other end is fixed on one end of the aluminium oxide ceramics protective case; the aluminium oxide ceramics stick is inserted into the aluminium oxide ceramics protective case, is supplied to the axial tensile force of fiber grating using the metal spring between the aluminium oxide ceramics stick and the aluminium oxide ceramics protective case and is experienced temperature change.
Description
Technical field
The present invention relates to sensory field of optic fibre, in particular to a kind of superelevation temperature sensor based on FBG.
Background technique
In general, the fiber optic passive device that fiber grating is novel as one kind, because it is with strong interference immunity, corrosion-resistant, body
Product is small, light-weight, the service life is long, connectionless loss, the good characteristics such as multiple spot distributed measurement can be achieved, and has in sensory field of optic fibre
Have broad application prospects.Common I type fiber grating is only applicable to 200 DEG C of working environments below, when temperature is higher than 200 DEG C
Its reflectivity declines with the rising of temperature, and when temperature is more than 300 DEG C, fiber grating generates attenuating effect, until erasing.And
And traditional fiber grating temperature sensor is also limited by encapsulating material.Such as the use operating temperature of epoxy resin packaging plastic
It is -50 DEG C~180 DEG C.These limit fiber grating and use in a high temperauture environment.
It can effectively sensor solve the above problems therefore, it is necessary to a kind of.
Summary of the invention
The purpose of the present invention is to provide a kind of superelevation temperature sensor based on FBG can be realized a wide range of and superhigh temperature
The measurement of degree.The superelevation temperature sensor based on FBG includes:
APC fibre-optical splice, aluminium oxide ceramics stick, stainless steel bar, fiber grating, metal spring and aluminium oxide ceramics protection
Set；
The APC fibre-optical splice is connected by the refractory ceramics glue with the aluminium oxide protective case, the optical fiber light
One end of grid is fixed on the free end of the aluminium oxide ceramics stick, and the other end is fixed on the one of the aluminium oxide ceramics protective case
End, the aluminium oxide ceramics stick are inserted into the aluminium oxide ceramics protective case, the aluminium oxide ceramics stick and the aluminium oxide
The axial tensile force of fiber grating is supplied to using the metal spring between ceramic protective sleeve and experiences temperature change.
Preferably, the bragg wavelength of the fiber grating is 1550nm.
Preferably, the thermal expansion coefficient of the stainless steel bar is~17 × 10-6/ DEG C.
Preferably, the thermal expansion coefficient of the aluminium oxide ceramics stick is~7 × 10-6/ DEG C.
Preferably, the thermal expansion coefficient of the aluminium oxide ceramics protective case is~7 × 10-6/ DEG C.
Preferably, it is fixed between the fiber grating and the aluminium oxide ceramics stick by refractory ceramics glue.
Preferably, solid by refractory ceramics glue between the fiber grating and the aluminium oxide ceramics protective case
It is fixed.
It should be appreciated that aforementioned description substantially and subsequent detailed description are exemplary illustration and explanation, it should not
As the limitation to the claimed content of the present invention.
Detailed description of the invention
With reference to the attached drawing of accompanying, the more purposes of the present invention, function and advantage are by the as follows of embodiment through the invention
Description is illustrated, in which:
Fig. 1 shows a kind of structural schematic diagram of superelevation temperature sensor based on FBG.
Fig. 2 shows a kind of operation principle schematic diagrams of superelevation temperature sensor based on FBG of the invention.
Specific embodiment
By reference to exemplary embodiment, the purpose of the present invention and function and the side for realizing these purposes and function
Method will be illustrated.However, the present invention is not limited to exemplary embodiment as disclosed below；Can by different form come
It is realized.The essence of specification is only to aid in those skilled in the relevant arts' Integrated Understanding detail of the invention.
Hereinafter, the embodiment of the present invention will be described with reference to the drawings.In the accompanying drawings, identical appended drawing reference represents identical
Or similar component or same or like step.
A kind of structural schematic diagram of superelevation temperature sensor based on FBG is shown.As shown in Figure 1,
The present invention provides a kind of, and the superelevation temperature sensor 100 based on FBG includes: APC fibre-optical splice 101, aluminium oxide pottery
Porcelain stick 102, stainless steel bar 103, fiber grating 104, metal spring 105 and aluminium oxide ceramics protective case 106；The APC light
Fine connector 101 is connected by the refractory ceramics glue 107 with the aluminium oxide protective case 106, and the one of the fiber grating 104
End is fixed on the free end of the aluminium oxide ceramics stick 102, and the other end is fixed on the one of the aluminium oxide ceramics protective case 106
End, the aluminium oxide ceramics stick 102 are inserted into the aluminium oxide ceramics protective case 106, the aluminium oxide ceramics stick 102 and institute
State axial tensile force and the sense for being supplied to fiber grating 104 between aluminium oxide ceramics protective case 106 using the metal spring 105
By temperature change, pasted admittedly between the fiber grating 104 and the aluminium oxide ceramics stick 102 by refractory ceramics glue 107
It is fixed；It is pasted and is fixed by refractory ceramics glue 107 between the fiber grating 104 and the aluminium oxide ceramics protective case 106.
Preferably, the bragg wavelength of the fiber grating 104 is 1550nm.
Preferably, the thermal expansion coefficient of the stainless steel bar 1003 is~17 × 10-6/ DEG C.
Preferably, the thermal expansion coefficient of the aluminium oxide ceramics stick 102 is~7 × 10-6/ DEG C.
Preferably, the thermal expansion coefficient of the aluminium oxide ceramics protective case 106 is~7 × 10-6/ DEG C.
The working principle of superelevation temperature sensor based on FBG we will elaborate in the following embodiments.
Fig. 2 shows a kind of operation principle schematic diagrams of superelevation temperature sensor based on FBG of the invention.As shown in Fig. 2,
The superelevation temperature sensor 200 based on FBG in the present embodiment includes: APC fibre-optical splice 201, aluminium oxide ceramics stick
202, stainless steel bar 203, fiber grating 204, metal spring 205 and aluminium oxide ceramics protective case 206；The APC optical fiber connects
First 101 are connected by the refractory ceramics glue 207 with the aluminium oxide protective case 206, and one end of the fiber grating 204 is solid
It is scheduled on the free end of the aluminium oxide ceramics stick 202, the other end is fixed on one end of the aluminium oxide ceramics protective case 106, institute
It states aluminium oxide ceramics stick 202 to be inserted into the aluminium oxide ceramics protective case 206, the aluminium oxide ceramics stick 202 and the oxygen
Change and is supplied to the axial tensile force of fiber grating 204 using the metal spring 205 between aluminium ceramic protective sleeve 206 and experiences temperature
Degree variation, is pasted by refractory ceramics glue 207 between the fiber grating 204 and the aluminium oxide ceramics stick 202 and is fixed；Institute
It states to paste between fiber grating 104 and the aluminium oxide ceramics protective case 206 by refractory ceramics glue 207 and fix.
Fiber grating 204 in the embodiment is II type fiber grating, bragg wavelength 1550nm, the fiber grating
204 one end is fixed on the free end of aluminium oxide ceramics stick 202, and the other end is connected to one end of aluminium oxide ceramics protective case 206,
It is pasted and is fixed with refractory ceramics glue 207 respectively.Thermal expansion coefficient is~17 × 10-6/ DEG C of stainless steel bar 203 and thermal expansion coefficient
For~7 × 10-6/ DEG C of aluminium oxide ceramics stick 202, it is inserted into the aluminium oxide ceramics that thermal expansion coefficient is~7 × 10-6/ DEG C and protects
In sheath 206.Testee 208 is pasted onto the oxidation of the superelevation temperature sensor 200 based on FBG by refractory ceramics glue 207
The side of aluminium ceramic protective sleeve 206, the length of testee are 250mm.
Based on optical fiber grating sensing is changed with the variation of extraneous parameter by its reflection wavelength.When wideband light source is in optical fiber
When being transmitted in grating, Mode Coupling is generated according to the fiber coupling theory of modules and meets the light wave λ of Bragg conditionBIt is reflected,
The light wave of commplementary wave length is transmitted, and is had
λB=2neffΛ (1)
In formula: Λ is the period of grating；neffFor the effective refractive index of grating.When the parameters such as temperature, stress change
When, it will lead to Λ and neffVariation, so as to cause λBVariation have
ΔλB=2 Δ neffΛ+2neffΔΛ (2)
The working principle of the FBG ultra-high temperature sensor proposed is to measure the change of bragg wavelength, and this change is
Caused by being strained as caused by temperature.
Bragg wavelengthsBOpposite changes delta λBFor
ΔλB=λB(1-pe)Δε (3)
In formula: peIt is the elasto-optical coefficient of fiber grating, for silica fibre, generally 0.22；
After the temperature that sensor experiences testee 208 influences, sensing element causes FBG to generate axial strain
It can be obtained by formula (3) and formula (4)
Wherein L is the length of glue envelope sensor.The parameter of sensor shown in Fig. 2 is respectively L=25mm, sensing element
Reflected wavelength lambda B=1550nm, the elasto-optical coefficient Pe=0.22 of II type FBG of effective length Leff=20mm, II type FBG, oxidation
Thermalexpansioncoefficientα 1=~7 of aluminium bar × 10-6/ DEG C, thermalexpansioncoefficientα 2=~17 of stainless steel bar × 10-6/ DEG C.
Since the thermal expansion coefficient of aluminium oxide is less than stainless steel, aluminium oxide is compared, the thermal expansion of stainless steel bar is larger.Cause
FBG generates axial strain.When the maximum temperature of application is 1000 DEG C, the relative displacement that the free end of alumina rod generates is
200μm.The maximum strain for being applied to the 25mm optical fiber comprising FBG is 8000 μ ε.The maximum of the wavelength shift at 1000 DEG C can be obtained
Value is about 9.6nm, and the temperature sensitivity of sensing probe is about 9.6pm/ DEG C.
Beneficial effects of the present invention at least that:
The II type fiber grating inscribed using the femto-second laser for being able to bear 1000 DEG C of superhigh temperature, and utilize the coefficient of expansion
Different materials and refractory ceramics glue are packaged.The temperature information on testee surface is converted to inside by the temperature sensor
Mechanical force, have many advantages, such as that temperature-measuring range is big, superhigh temperature resistant, overcomes temperature strain cross-sensitivity, can remotely monitor.
In conjunction with the explanation and practice of the invention disclosed here, the other embodiment of the present invention is for those skilled in the art
It all will be readily apparent and understand.Illustrate and embodiment is regarded only as being exemplary, true scope of the invention and purport are equal
It is defined in the claims.
Claims (7)
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| CN201610953668.7A CN106546354B (en) | 2016-11-03 | 2016-11-03 | A kind of superelevation temperature sensor based on FBG |
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| CN201610953668.7A CN106546354B (en) | 2016-11-03 | 2016-11-03 | A kind of superelevation temperature sensor based on FBG |
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| CN106546354A CN106546354A (en) | 2017-03-29 |
| CN106546354B true CN106546354B (en) | 2019-03-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108151665A (en) * | 2017-12-26 | 2018-06-12 | 北京信息科技大学 | A kind of superhigh temperature resistant strain transducer based on FBG |
| CN108151909A (en) * | 2017-12-26 | 2018-06-12 | 北京信息科技大学 | A kind of superelevation temperature sensor based on FBG |
| CN108169696A (en) * | 2017-12-27 | 2018-06-15 | 北京信息科技大学 | A kind of magnetic field strength transducer and its performance test methods based on FBG |
| CN113203704B (en) * | 2021-05-11 | 2022-09-27 | 东北大学 | A kind of transformer monitoring and sensing integrated optical fiber sensor and using method |
Citations (6)
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|---|---|---|---|---|
| TW476013B (en) * | 2000-08-07 | 2002-02-11 | Ind Tech Res Inst | Electric fiber grating filter with switchable central wavelength |
| US6366721B1 (en) * | 1999-11-04 | 2002-04-02 | Industrial Technology Research Institute | Tunable optical fiber grating |
| CN101526339A (en) * | 2009-04-22 | 2009-09-09 | 东南大学 | Temperature self-compensation fiber grating displacement sensor |
| US7801403B2 (en) * | 2007-10-30 | 2010-09-21 | Fei Luo | Optical fiber grating tuning device and optical systems employing same |
| CN201844820U (en) * | 2010-11-08 | 2011-05-25 | 昆明理工大学 | Double-cantilever beam type optical fiber Bragg grating displacement sensor |
| CN102564640A (en) * | 2012-01-04 | 2012-07-11 | 中国计量学院 | LPFG (Long Period Fiber Grating) high temperature sensor based on stretching compensation encapsulation technology |
-
2016
- 2016-11-03 CN CN201610953668.7A patent/CN106546354B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6366721B1 (en) * | 1999-11-04 | 2002-04-02 | Industrial Technology Research Institute | Tunable optical fiber grating |
| TW476013B (en) * | 2000-08-07 | 2002-02-11 | Ind Tech Res Inst | Electric fiber grating filter with switchable central wavelength |
| US7801403B2 (en) * | 2007-10-30 | 2010-09-21 | Fei Luo | Optical fiber grating tuning device and optical systems employing same |
| CN101526339A (en) * | 2009-04-22 | 2009-09-09 | 东南大学 | Temperature self-compensation fiber grating displacement sensor |
| CN201844820U (en) * | 2010-11-08 | 2011-05-25 | 昆明理工大学 | Double-cantilever beam type optical fiber Bragg grating displacement sensor |
| CN102564640A (en) * | 2012-01-04 | 2012-07-11 | 中国计量学院 | LPFG (Long Period Fiber Grating) high temperature sensor based on stretching compensation encapsulation technology |
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Application publication date: 20170329 Assignee: NINGBO TIANDE INNOVATION INTELLIGENT TECHNOLOGY Co.,Ltd. Assignor: Beijing Information Science & Technology University Contract record no.: X2020990000716 Denomination of invention: An ultra high temperature sensor based on FBG Granted publication date: 20190308 License type: Common License Record date: 20201230 |
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