CN203811139U - Calibrating apparatus for fiber bragg grating high-temperature strain sensor - Google Patents
Calibrating apparatus for fiber bragg grating high-temperature strain sensor Download PDFInfo
- Publication number
- CN203811139U CN203811139U CN201320859032.8U CN201320859032U CN203811139U CN 203811139 U CN203811139 U CN 203811139U CN 201320859032 U CN201320859032 U CN 201320859032U CN 203811139 U CN203811139 U CN 203811139U
- Authority
- CN
- China
- Prior art keywords
- strain
- fbg
- temperature
- sensor
- strain sensor
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a calibrating apparatus for a fiber bragg grating (FBG) high-temperature strain sensor and belongs to fiber sensing field. The calibrating apparatus is characterized by comprising a high-precision temperature control box, a constant-strength cantilever beam, a counterweight, a FBG high-temperature strain sensor, a high-temperature strain gage, a resistance strain gauge, and a FBG demodulator. The utility model resolves a technical problem to provides a calibrating apparatus for a FBG high-temperature strain sensor and problems of strain detection and calibration in environment over 200 degrees centigrade. The calibrating apparatus may normally operate within a temperature range from -20 to 350 degrees centigrade, and monitor and calibrate FBG high-temperature strain sensors with measurement accuracy ranges within 0.5 percent and strain scales within +/- 1500 [mu][epsilon].
Description
Technical field
The invention belongs to sensory field of optic fibre, relate to the caliberating device of a kind of fiber grating (FBG) high-temp strain sensor.
Background technology
Within 1979, Fibre Optical Sensor is tentatively imbedded first composite inner by NASA, monitor its strain and temperature, open up the road of the application of Fibre Optical Sensor, Fibre Optical Sensor is due to its unique advantage, gradually to other field expansion: be the maximum field of current FBG sensor application to the safety monitoring of bridge structure in civil engineering work, in Aero-Space, adopt the Real-Time Monitoring of FBG sensor to compound substance, and for oceanographic engineering, FBG sensor is the ideal transducer that meets marine environment and its structure is carried out to secular strain monitoring.
FBG strain transducer is a kind of sensor of realizing strain sensing, and it realizes the measurement of strain by the linear relationship of optical wavelength and strain, but its suitable application area is still limited in the temperature field lower than 200 DEG C.In the environment higher than 200 DEG C, it is a difficult point in engineering that the detection of strain remains, high temperature can bring many impacts to sensor, testing tool and test data, need to take measure targetedly to ensure the feasibility of testing scheme and the accuracy of test data.FBG sensor needs are a kind of at present can be at the experimental provision that carries out strain detecting and demarcation higher than 200 DEG C of temperature.
The present invention proposes a kind of FBG high-temp strain sensor calibration apparatus, can in-20～350 DEG C of temperature ranges, normally work, and can in measuring accuracy 0.5% scope, strain range carries out experimental calibration for the FBG high-temp strain sensor of ± 1500 μ ε.
Summary of the invention
Technical matters solved by the invention is to provide a kind of experimental calibration device of FBG high-temp strain sensor, solve a difficult problem for FBG sensing strain detecting and demarcation in the environment higher than 200 DEG C, and can demarcate the FBG high-temp strain sensor in 0.5% accuracy rating.
To achieve these goals, technical scheme of the present invention is:
A kind of FBG high-temp strain sensor calibration apparatus:
Comprise high precision temperature control case, equi intensity cantilever, counterweight, FBG high-temp strain sensor, high temperature strain foil, electric wire strain gauge and fiber Bragg grating (FBG) demodulator, FBG high-temp strain installation of sensors is at equi intensity cantilever upper surface, be connected to fiber Bragg grating (FBG) demodulator, high temperature strain foil is connected to electric wire strain gauge by high temperature wire, the bottom lead hole that temperature control box is passed through by steel wire in one end of equi intensity cantilever causes outside, connects and demarcates loaded load counterweight.
Described high precision temperature control case, operating temperature range is-20～350 DEG C, possesses automatic temperature-controlled pid algorithm, control accuracy reaches ± and 0.1 DEG C, from starting working, the temperature stabilization time is less than 0.5 hour.A fairlead is arranged at temperature control box top, for drawing the lead-in wire of sensor and high temperature strain foil; A fairlead is arranged at temperature control box bottom, for drawing the charger of calibrating block counterweight.
Described equi intensity cantilever and counterweight: equi intensity cantilever base is fixed on high precision temperature control case bottom, in-20～350 DEG C of temperature ranges, provides strain, and counterweight is as calibration strain loaded load.
Described FBG high-temp strain sensor, operating temperature range is-20～350 DEG C, measures range ± 1500 μ ε, measuring accuracy is lower than 0.5%.
Described high temperature strain foil, operating temperature range :-20～350 DEG C, strain range is ± 1500 μ ε, and precision is better than 1%, requires to stick on FBG high-temp strain sensor same area, as experimental comparison;
Described electric wire strain gauge and fiber Bragg grating (FBG) demodulator, be respectively used to read the resistance-strain value of high temperature strain foil and the output wave long value of FBG high-temp strain sensor, and precision is all better than 0.1%.
FBG high-temp strain sensor is sticked on to equi intensity cantilever upper surface, high temperature strain foil is sticked on and FBG sensor same area simultaneously, place it in high precision temperature control case, the lead-in wire of FBG sensor and high temperature strain foil is connected to electric wire strain gauge and fiber Bragg grating (FBG) demodulator via the fairlead at temperature control box top, accurately controls the variation of high precision temperature control case-20～350 DEG C of temperature.Before test, record the initial reading of fiber Bragg grating (FBG) demodulator, electric wire strain gauge is carried out to zero setting simultaneously.When test, start to load counterweight, counterweight and high temperature strain foil are demarcated thing as corresponding strain in experiment test, record the resistance-strain value of electric wire strain gauge demonstration and corresponding wavelength value, thereby complete calibration process.
The present invention has following beneficial effect with respect to prior art:
Proposed a kind of FBG high-temp strain sensor calibration apparatus, solved the FBG sensor surface strain testing in-20～350 DEG C of temperature ranges, strain range ± 1500 μ ε, is applicable to the demarcation of precision lower than 0.5% FBG high-temp strain sensor.
Brief description of the drawings
Fig. 1 is caliberating device figure of the present invention.
Fig. 2 is the installation site schematic diagram of FBG high-temp strain sensor and high temperature strain foil on equi intensity cantilever of the present invention.
In figure: 1 is high precision temperature control case, 2 is FBG high-temp strain sensor, and 3 is high temperature strain foil, and 4 is equi intensity cantilever, and 5 is fiber Bragg grating (FBG) demodulator, and 6 is electric wire strain gauge, and 7 is counterweight.
Embodiment
Below in conjunction with accompanying drawing and enforcement, the present invention is described further.
As shown in Figure 1, the present invention includes high precision temperature control case (1), FBG high-temp strain sensor (2), high temperature strain foil (3), equi intensity cantilever (4), fiber Bragg grating (FBG) demodulator (5), electric wire strain gauge (6) and load counterweight (7); High precision temperature control case (1) requires by the automatic temperature-controlled algorithm of its PID, and control accuracy reaches ± and 0.1 DEG C, operating temperature range is-20～350 DEG C, from starting working, the temperature stabilization time is less than 0.5 hour; The reflectivity of high temperature FBG strain transducer (2) is greater than 90%, and applicable working temperature scope is-20～350 DEG C, and detecting range of strain is ± 1500 μ ε; High temperature strain foil (3) operating temperature range is-20～350 DEG C, and resistance is 120 Ω, and detecting range of strain is ± 1500 μ ε; Equi intensity cantilever (4) requires in-20～350 DEG C of temperature ranges, can normally provide strain by the loading of demarcating loaded load counterweight 7.
As shown in Figure 2, high temperature FBG strain transducer (2) is mounted on to equi intensity cantilever (4) shown position, high temperature strain foil (3) is mounted on to shown position simultaneously.
Specific experiment process is as follows:
By fiber Bragg grating (FBG) demodulator (5) in FBG high-temp strain sensor (2) connection, high temperature strain foil (3) is connected to electric wire strain gauge (6) by high temperature wire, before the each measurement of electric wire strain gauge (6), needs zero setting; The bottom lead hole that temperature control box is passed through by steel wire in the top of equi intensity cantilever (4) causes outside, provides strain at external load counterweight (7).
Build whole experimental provision according to shown in said process and Fig. 1, high temperature FBG strain transducer (2) and high temperature strain foil (3) are mounted on respectively to equi intensity cantilever (4) upper surface, record the initial wavelength of high temperature FBG strain transducer (2).The internal temperature of high precision temperature control case (1) is accurately controlled in the scope of-20～350 DEG C, in experimentation, when every temperature control box rises to a certain temperature, after it is stable, to, by electric wire strain gauge (6) zero setting, get rid of the impact of temperature on FBG high-temp strain sensor (2); After the wavelength demonstration of high temperature FBG strain transducer (2) is stablized, start to carry out in temperature control box outside counterweight (7) and load, marking wave long value and strain value simultaneously.The strain value of each record, is the needed calibration value of sensor corresponding wavelength, thereby completes calibration process.
Claims (1)
1. the caliberating device of a high temperature fiber grating strain transducer, it is characterized in that: comprise high precision temperature control case (1), equi intensity cantilever (4), counterweight (7), FBG high-temp strain sensor (2), high temperature strain foil (3), electric wire strain gauge (6) and fiber Bragg grating (FBG) demodulator (5), FBG high-temp strain sensor (2) is arranged on equi intensity cantilever (4) upper surface, be connected to fiber Bragg grating (FBG) demodulator (5), high temperature strain foil (3) is connected to electric wire strain gauge (6) by high temperature wire, the bottom lead hole that temperature control box is passed through by steel wire in one end of equi intensity cantilever (4) causes outside, connect and demarcate loaded load counterweight (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320859032.8U CN203811139U (en) | 2013-12-20 | 2013-12-20 | Calibrating apparatus for fiber bragg grating high-temperature strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320859032.8U CN203811139U (en) | 2013-12-20 | 2013-12-20 | Calibrating apparatus for fiber bragg grating high-temperature strain sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203811139U true CN203811139U (en) | 2014-09-03 |
Family
ID=51449877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320859032.8U Expired - Fee Related CN203811139U (en) | 2013-12-20 | 2013-12-20 | Calibrating apparatus for fiber bragg grating high-temperature strain sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203811139U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579722A (en) * | 2018-12-07 | 2019-04-05 | 东莞理工学院 | A kind of positioning and demarcating device of long range distribution type fiber-optic |
| CN109990818A (en) * | 2018-11-30 | 2019-07-09 | 东莞理工学院 | A kind of fiber-optic grating sensor marking apparatus |
| CN113587839A (en) * | 2021-08-07 | 2021-11-02 | 中国计量科学研究院 | Temperature-variable strain sensor calibration device and method |
| CN114322818A (en) * | 2022-03-09 | 2022-04-12 | 北京航空航天大学 | Heat sink fiber grating calibration device and method for thermal experiment of aerospace environment simulator |
-
2013
- 2013-12-20 CN CN201320859032.8U patent/CN203811139U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990818A (en) * | 2018-11-30 | 2019-07-09 | 东莞理工学院 | A kind of fiber-optic grating sensor marking apparatus |
| CN109990818B (en) * | 2018-11-30 | 2021-02-02 | 东莞理工学院 | Fiber grating sensor calibration instrument |
| CN109579722A (en) * | 2018-12-07 | 2019-04-05 | 东莞理工学院 | A kind of positioning and demarcating device of long range distribution type fiber-optic |
| CN113587839A (en) * | 2021-08-07 | 2021-11-02 | 中国计量科学研究院 | Temperature-variable strain sensor calibration device and method |
| CN114322818A (en) * | 2022-03-09 | 2022-04-12 | 北京航空航天大学 | Heat sink fiber grating calibration device and method for thermal experiment of aerospace environment simulator |
| CN114322818B (en) * | 2022-03-09 | 2022-06-14 | 北京航空航天大学 | Heat sink fiber grating calibration device and method for aerospace environment simulator thermal experiment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104729418A (en) | Calibration device and method for fiber grating high temperature strain transducer | |
| CN203811139U (en) | Calibrating apparatus for fiber bragg grating high-temperature strain sensor | |
| CN102313523B (en) | Sensitivity calibration method of fiber Bragg grating strain sensor | |
| Peng et al. | Design and investigation of a sensitivity-enhanced fiber Bragg grating sensor for micro-strain measurement | |
| CN201331395Y (en) | Fibre grating temperature compensation transducer | |
| CN103105138A (en) | Fiber bragg grating strain sensitivity calibration device and method | |
| CN103335603A (en) | Distributed optical fiber gauge factor calibration device and calibration method | |
| CN105115438A (en) | An optical fiber sensing system temperature compensating method | |
| CN102121860A (en) | Corrugated diaphragm type pipe external pressure sensor, oil-water well casing external pressure monitoring device and method | |
| Li et al. | Design of an enhanced sensitivity FBG strain sensor and application in highway bridge engineering | |
| Di Sante et al. | Temperature-compensated fibre Bragg grating‐based sensor with variable sensitivity | |
| CN103575332B (en) | Multi-dimensional and multidirectional stress-strain monitoring system | |
| Ma et al. | Strain transfer characteristics of surface-attached FBGs in aircraft wing distributed deformation measurement | |
| CN1482474A (en) | Packaging structure of fibre-optical grating | |
| Zhou et al. | Fiber-reinforced polymer-packaged optical fiber sensors based on Brillouin optical time-domain analysis | |
| Liu et al. | A dynamometer design and analysis for measurement the cutting forces on turning based on optical fiber Bragg Grating sensor | |
| CN202562673U (en) | Strain acquisition system based on voltage compensation | |
| Nawrot et al. | Mechanical strain-amplifying transducer for fiber Bragg grating sensors with applications in structural health monitoring | |
| Fisser et al. | Method for $ In-Situ $ Strain Transfer Calibration of Surface Bonded Fiber Bragg Gratings | |
| CN104990668A (en) | Fiber bragg grating tension sensor calibration method | |
| CN101586989B (en) | Fiber grating temperature sensor for electrolytic bath shell | |
| CN202692950U (en) | Fiber bragg grating sensing device applied to concrete pile strain monitoring | |
| CN104458105A (en) | Method for detecting pressure in oil well and optical grating sensor used in same | |
| CN204373808U (en) | A kind of Fiber Bragg Grating Temperature sensor measuring dry-type air-core reactor temperature | |
| Jiang et al. | One novel type of miniaturization FBG rotation angle sensor with high measurement precision and temperature self-compensation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20141220 |
|
| EXPY | Termination of patent right or utility model |