CN1195202C - Integrated optical fibre strain and temp sensor device - Google Patents
Integrated optical fibre strain and temp sensor device Download PDFInfo
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- CN1195202C CN1195202C CN 00113188 CN00113188A CN1195202C CN 1195202 C CN1195202 C CN 1195202C CN 00113188 CN00113188 CN 00113188 CN 00113188 A CN00113188 A CN 00113188A CN 1195202 C CN1195202 C CN 1195202C
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 70
- 239000010453 quartz Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims description 29
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The present invention discloses an integrated optical fiber strain and temperature transducer device which comprises an optical fiber enamel-amber interference strain transducer 4 and a broadband optical fiber raster 2. The transducer 4 is connected with a broadband optical fiber coupler 7. The broadband optical fiber coupler 7 is respectively connected with broadband light sources 11 and 12, a spectrograph 10 and a photodetector 9 by two wavelength division multiplexing couplers. The outside of the transducer 4 is provided with a quartz capillary tube 1, a cavity which is formed by two reflecting surfaces is arranged in the quartz capillary tube 1, and the two reflecting surfaces are composed of the end face of a single-mode optical fiber 5 and the end face of a multi-mode optical fiber 3. The broadband optical fiber raster 2 is positioned on the single-mode optical fiber 5, an a distance of 0-10mm is formed between the broadband optical fiber raster 2 and the end head of the single-mode optical fiber 5. The present invention has the advantages of high integration level, no crosstalk, good stability and simple structure technology.
Description
Technical field
The present invention relates to a kind of Fibre Optical Sensor, be specifically related to a kind of integrated optical fibre strain and temp sensor device, belong to sensory field of optic fibre.
Background technology
In large-scale modernization project structure, in the security guarantee as bridge, dam, skyscraper, aircraft, naval vessels etc., strain monitoring is must indispensable means, all needs strain monitoring to build and running quality guaranteeing in the production run of each class formation and in the use after having built.Traditional resistance strain gage has obtained widely using in practice, still has deficiencies such as line is too many, anti-electromagnetic interference capability is poor, corrosion resistivity is poor, the life-span is short but compare with fibre optic strain sensor.For quasistatic and static strain measurement, Temperature Influence is bigger in actual applications, and therefore how revising the strain measurement error of introducing owing to the variation of environment temperature is an important problems.China Patent No. 95192033 disclosed " can utilize single diffraction grating to carry out deformation and thermometric embedded optical sensor ", its utilization birefringence principle, what adopt is single-sensor, and it is big to crosstalk between strain in use and the temperature signal, and precision is not high.In addition, in the report of existing multiple fibre strain and temperature simultaneously measuring technology, the ubiquity integrated level is not high yet, spatial resolution is limited, be difficult to be applied to the problem that need imbed within the material.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, a kind of integrated level height is provided, do not have crosstalk, good stability, structural manufacturing process simply, integrated optical fibre strain and temp sensor device cheaply.
For achieving the above object, the technical solution used in the present invention is:
A kind of integrated optical fibre strain and temp sensor device, comprise the optical fiber enamel---Fabry-Parot interferent strain transducer and band optical fiber grating, it is characterized in that: described optical fiber enamel---Fabry-Parot interferent strain transducer 4 connects broadband optical fiber coupler 7, described broadband optical fiber coupler 7 connects two wave division multiplex couplers 6 more respectively, wherein a wave division multiplex coupler connects the different wideband light source of wavelength 11,12 respectively, and another wave division multiplex coupler 6 connects spectrometer 10 respectively and by linking photodetector 9 as the broadband grating 8 of reconciling device.Described optical fiber enamel---Fabry-Parot interferent strain transducer has an outside quartz capillary 1, one and the cavity that constitutes relative with multimode optical fiber 3 end faces by the end face of single-mode fiber 5 arranged in the quartz capillary 1, and the end face of single-mode fiber 5 and multimode optical fiber 3 end faces form two reflectings surface.Described quartz capillary 1 fuses described single-mode fiber 5 by laser bonding and gummed with multimode optical fiber 3, a band optical fiber grating 2 is placed on the described single-mode fiber 5, and is positioned at apart from single-mode fiber 5 0～10 millimeter place, termination at quartz capillary 1.The bandwidth of described band optical fiber grating 2 is 2～20nm, and wavelength coverage is 0.8～1.6 μ m, and length is 0.2-1cm.The spacing of described single-mode fiber 5 end faces and another multimode optical fiber 3 end faces is 100-400 μ m.The length of described quartz capillary 1 is 2-5cm, and external diameter is 300 μ m, and internal diameter is 150 μ m.The wavelength of described broadband optical fiber coupler 7 is 1.3 μ m/1.55 μ m.The wavelength of described wave division multiplex coupler 6 is 1.3 μ m/1.55 μ m.The wavelength of described wideband light source 11,12 is respectively 1.3 μ m and 1.55 μ m.
Thereby the utility model integrated optical fibre strain and temp sensor device are integrated in band optical fiber grating temperature sensing element strain and the temperature simultaneously measuring of realizing very little part in optical fiber enamel-Fabry-Parot interferent sensor dexterously, have outstanding features such as integrated level height, little, the easy manufacturing of volume, good stability; And creatively use WDM structure, the utmost point has solved the optical fiber enamel effectively---Fabry-Parot interferent sensor and the cross-interference issue of band optical fiber grating in strain measurement.So aspects such as the present invention monitors in real time at monitoring structural health conditions, material processing, intelligence structure will play an important role.
Description of drawings
Fig. 1 is integrated optical fibre strain and temp sensor device structural representation.
Fig. 2 is the optical fiber enamel---Fabry-Parot interferent strain transducer structure for amplifying synoptic diagram.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing:
Referring to Fig. 1, the utility model integrated optical fibre strain and temp sensor device comprise the optical fiber enamel---a Fabry-Parot interferent strain transducer and a band optical fiber grating, optical fiber enamel---Fabry-Parot interferent strain transducer 4 connects broadband optical fiber coupler 7, broadband optical fiber coupler 7 connects two wave division multiplex couplers 6 more respectively, wherein a wave division multiplex coupler 6 connects the different wideband light source of wavelength 11 and 12 respectively, another wave division multiplex coupler 6 connects spectrometer 10 respectively, and by linking photodetector 9 as the broadband grating 8 of reconciling device.
Referring to Fig. 2, described optical fiber enamel---Fabry-Parot interferent strain transducer has an outside quartz capillary 1, one and the cavity that constitutes relative with multimode optical fiber 3 end faces by the end face of single-mode fiber 5 arranged in the quartz capillary 1, and the end face of single-mode fiber 5 and multimode optical fiber 3 end faces form two reflectings surface.Described quartz capillary 1 fuses described single-mode fiber 5 by laser bonding and gummed with multimode optical fiber 3, a band optical fiber grating 2 is placed on the described single-mode fiber 5, and is positioned at apart from single-mode fiber 5 0～10 millimeter place, termination at quartz capillary 1.
With the optical fiber enamel---Fabry-Parot interferent strain transducer 4 directly adheres to or imbeds in material and the structure, during measurement 2 * 2 broadband optical fiber couplers 7 are inserted sensor 4, using wavelength-division multiplex 6 will be from the optical fiber enamel---and the signal that Fabry-Parot interferent chamber and band optical fiber grating 2 return is separately to measure respectively, here the broadband grating is 1.55 μ m, the optical fiber enamel---amber chamber 1.3 mum wavelengths.
By the optical fiber enamel---the long variation in Fabry-Parot interferent chamber just can be measured the size of strain, and the long all available spectrometer 10 of centre wavelength with band optical fiber grating 2 in this chamber is finished measurement, so signal processing system is simple, practical.The wavelength variations that causes owing to temperature variation of band optical fiber grating 2 in addition, an available broadband grating that is equal to 8 is done to reconcile devices, utilizes light intensity to change and realizes measuring, and makes signal Processing simple more, fast.Integrated optical fibre strain of the present invention and temp sensor device are applied to the strain and the temperature simultaneously measuring of compound substance, and the strain precision can reach ± 20 μ ε, and temperature is ± 1 ℃; Strain measurement scope ± 2 μ ε, temperature range ± 450 ℃.
Claims (9)
1. integrated optical fibre strain and temp sensor device, comprise the optical fiber enamel---Fabry-Parot interferent strain transducer and band optical fiber grating, it is characterized in that: described optical fiber enamel---Fabry-Parot interferent strain transducer (4) connects broadband optical fiber coupler (7), described broadband optical fiber coupler (7) connects two wave division multiplex couplers (6) more respectively, wherein a wave division multiplex coupler connects the different wideband light source of wavelength (11) respectively, (12), another wave division multiplex coupler (6) connects spectrometer (10) respectively and links photodetector (9) by the broadband grating (8) of conduct conciliation device; Described optical fiber enamel---Fabry-Parot interferent strain transducer has an outside quartz capillary (1), one and the cavity that constitutes relative with multimode optical fiber (3) end face by the end face of single-mode fiber (5) arranged, two reflectings surface of the end face of single-mode fiber (5) and the formation of multimode optical fiber (3) end face in the quartz capillary (1); Described quartz capillary (1) fuses described single-mode fiber (5) and multimode optical fiber (3) by laser bonding and gummed, one band optical fiber grating (2) is placed on the described single-mode fiber (5), and is positioned at apart from single-mode fiber (5) 0～10 millimeter place, termination at quartz capillary (1).
2. fibre strain according to claim 1 and temp sensor device is characterized in that: the bandwidth of described band optical fiber grating (2) is 2～20nm, and wavelength coverage is 0.8～1.6 μ m, and length is 0.2-1cm.
3. fibre strain according to claim 1 and temp sensor device is characterized in that: the spacing of described single-mode fiber (5) end face and multimode optical fiber (3) end face is 100-400 μ m.
4. fibre strain according to claim 1 and temp sensor device is characterized in that: the length of described quartz capillary (1) is 2-5cm, and external diameter is 300 μ m, and internal diameter is 150 μ m.
5. according to claim 1 to 4 each described fibre strain and temp sensor device, it is characterized in that: the wavelength of described broadband optical fiber coupler is 1.3 μ m/1.55 μ m.
6. fibre strain according to claim 5 and temp sensor device is characterized in that: the wavelength of described wave division multiplex coupler is 1.3 μ m/1.55 μ m.
7. fibre strain according to claim 5 and temp sensor device is characterized in that: the wavelength of described wideband light source (11), (12) is respectively 1.3 μ m and 1.55 μ m.
8. according to described fibre strain of claim 1 to 4 and temp sensor device, it is characterized in that: the wavelength of described wave division multiplex coupler is 1.3 μ m/1.55 μ m.
9. according to claim 1 to 4 each described fibre strain and temp sensor device, it is characterized in that: the wavelength of described wideband light source (11), (12) is respectively 1.3 μ m and 1.55 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00113188 CN1195202C (en) | 2000-09-15 | 2000-09-15 | Integrated optical fibre strain and temp sensor device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00113188 CN1195202C (en) | 2000-09-15 | 2000-09-15 | Integrated optical fibre strain and temp sensor device |
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| CN1343873A CN1343873A (en) | 2002-04-10 |
| CN1195202C true CN1195202C (en) | 2005-03-30 |
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| CN 00113188 Expired - Lifetime CN1195202C (en) | 2000-09-15 | 2000-09-15 | Integrated optical fibre strain and temp sensor device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373133C (en) * | 2005-09-26 | 2008-03-05 | 山东省科学院激光研究所 | Multi-mode optica lfiber grating sensing system |
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| CA2520862A1 (en) | 2003-03-31 | 2004-10-21 | Zolo Technologies, Inc. | Method and apparatus for the monitoring and control of combustion |
| US7787728B2 (en) | 2004-03-31 | 2010-08-31 | Zolo Technologies, Inc. | Optical mode noise averaging device |
| CN100402975C (en) * | 2004-12-07 | 2008-07-16 | 中山大学 | White light interference optical fibre sensor for straining measure |
| CN100340839C (en) * | 2005-09-27 | 2007-10-03 | 天津大学 | Fibre-optical strain measuring device and method thereof |
| CN100367016C (en) * | 2005-09-27 | 2008-02-06 | 天津大学 | Fibre-optical temperature measuring device and measurement thereof |
| US8544279B2 (en) | 2005-11-04 | 2013-10-01 | Zolo Technologies, Inc. | Method and apparatus for spectroscopic measurements in the combustion zone of a gas turbine engine |
| CN101034007A (en) * | 2007-01-24 | 2007-09-12 | 冉曾令 | Optical fiber Fabry-Perot sensor and manufacture method therefore |
| CA2748793C (en) | 2009-01-09 | 2016-06-07 | Michael John Estes | Method and apparatus for monitoring combustion properties in an interior of a boiler |
| JP5856058B2 (en) | 2009-08-10 | 2016-02-09 | ゾロ テクノロジーズ，インコーポレイティド | Mitigation of optical signal noise using multimode optical fiber |
| JP6196289B2 (en) | 2012-04-19 | 2017-09-13 | ゾロ テクノロジーズ，インコーポレイティド | In-furnace retroreflector with tunable tunable diode laser absorption spectrometer |
| AU2015370309B2 (en) | 2014-12-23 | 2021-06-10 | Onpoint Technologies, Llc | TDLAS architecture for widely spaced wavelengths |
| CN108801308A (en) * | 2018-08-29 | 2018-11-13 | 闫静 | A kind of fiber grating Multifunction Sensor |
| CN111006600A (en) * | 2019-10-31 | 2020-04-14 | 中国空间技术研究院 | System for measuring satellite temperature and deformation quantity by using fiber bragg grating |
-
2000
- 2000-09-15 CN CN 00113188 patent/CN1195202C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373133C (en) * | 2005-09-26 | 2008-03-05 | 山东省科学院激光研究所 | Multi-mode optica lfiber grating sensing system |
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