CN102981019A - Optical fiber hot-wire type wind gage based on tilted fiber bragg grating - Google Patents
Optical fiber hot-wire type wind gage based on tilted fiber bragg grating Download PDFInfo
- Publication number
- CN102981019A CN102981019A CN2012104046541A CN201210404654A CN102981019A CN 102981019 A CN102981019 A CN 102981019A CN 2012104046541 A CN2012104046541 A CN 2012104046541A CN 201210404654 A CN201210404654 A CN 201210404654A CN 102981019 A CN102981019 A CN 102981019A
- Authority
- CN
- China
- Prior art keywords
- bragg grating
- fiber bragg
- tilted
- optical fiber
- wavelength
- 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.)
- Pending
Links
Abstract
The invention relates to an optical fiber hot-wire type wind gage based on a tilted fiber bragg grating which uses wavelength demodulation method to achieve wind power measurement and solves problems that an ordinary optical fiber sensor is complex in structure and high in cost. The optical fiber hot-wire type wind gage based on a tilted fiber bragg grating is capable of enabling pump light source to enter a wind gage through a wavelength division multiplexer, being coupled into a cladding of a cladding mode of the tilted fiber bragg grating, heating a metallic film plated on the surface, raising temperature of the optical fiber to cause redshift of wavelength of the tilted fiber bragg grating, lowering the temperature of the optical fiber by wind to cause blueshift of wavelength of the tilted fiber bragg grating, and obtaining information related to the wind power through wavelength measurement by broadband light source and a spectrometer. The optical fiber hot-wire type wind gage based on the tilted fiber bragg grating is small in size, simple in structure, low in cost, strong in operability, and capable of being widely used in various wind monitoring fields.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, be specifically related to a kind of optical fiber hot-wire windage scale based on tilted fiber Bragg grating.
Background technology
Optical fiber hot-wire windage scale is compared with traditional windage scale, has unique advantage: highly sensitive, lightweight, volume is little, anti-electromagnetic interference (EMI), corrosion-resistant, essential safety.Because optical fiber hot-wire windage scale is to utilize light wave transmissions information, and optical fiber can be used as electrical isolation, corrosion resistant transmission medium, and this makes it can be used for easily and effectively the strong electromagnetic such as various large-scale electromechanics, seismic event detection, petrochemical complex, mine and the rugged surroundings such as inflammable and explosive.
The mechanism of measuring medium as hot-wire wind-force with optical fiber is varied, and based on the optical fiber hot-wire windage scale principle of tilted fiber Bragg grating simply comparatively simple-at tilted fiber Bragg grating plating metal on surface film, and the wind meeting so that the metallic film temperature that is heated by pump light reduce, the bragg peak wavelength that causes tilted fiber Bragg grating changes, and its wavelength is measured the relevant information that can obtain wind-force by spectrometer and wideband light source.This optical fiber windage scale is simple in structure, the convenient making, and need not to destroy this body structure of optical fiber and the concern that is subject to people.The optical fiber windage scale is the same with other Fibre Optical Sensors can be operated in the characteristics of working in the particular surroundingss such as strong electromagnetic, added its constantly development since coming out, need to be widely used aspect the measuring wind speed in commercial production, environmental monitoring etc., therefore study the tilted fiber Bragg grating windage scale and have great importance.
Summary of the invention
The objective of the invention is the not high shortcoming of complex structure, sensitivity and repeatability for the existence of existing fiber Bragg grating windage scale, proposed a kind of simplicity of design, compact conformation, highly sensitive, lower-cost optical fiber hot-wire windage scale based on tilted fiber Bragg grating.
The present invention is that the technical scheme that the technical solution problem is taked is:
A kind of hot-wire windage scale based on tilted fiber Bragg grating comprises wideband light source, pump light source, fiber optical circulator, crest multiplexer, the tilted fiber Bragg grating that is coated with metallic film, spectrometer.
Metallic film on the tilted fiber Bragg grating plated surface is as sensing head.The Common end of crest multiplexer is linked to each other with tilted fiber Bragg grating one end that is coated with metallic film, and the Reflect end links to each other with pump light source, and the Pass end links to each other with the fiber optical circulator reflection end.The fiber optical circulator input end is linked to each other with wideband light source, and output terminal links to each other with spectrometer, forms like this tilted fiber Bragg grating windage scale system.
The advantage that the present invention has:
With the tilted fiber Bragg grating that is coated with metallic film as sensing head, have the advantages such as simple in structure, that convenience is made, the sensing head volume is little, cost of manufacture is low, can be widely used in the various environment of wind-force monitoring or the engineering fields strict to size sensor of needing.
2. different wind speed makes the metallic film that is heated by pump light source present different temperatures, thereby the bragg peak wavelength of tilted fiber Bragg grating is changed, by can realize the measurement of wind-force to the demodulation of bragg peak wavelength.Therefore this optical fiber windage scale has the advantage that measuring principle is simple, precision is high.
Description of drawings
Fig. 1 is tilted fiber Bragg grating hot-wire windage scale system diagram of the present invention
Fig. 2 is the optical fiber hot-wire windage scale synoptic diagram based on tilted fiber Bragg grating of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Such as Fig. 1, shown in 2, a kind of optical fiber hot-wire wind-force based on tilted fiber Bragg grating mainly comprises spectrometer 1, wideband light source 2, fiber optical circulator 3, pump light source 4, wavelength division multiplexer 5, tilted fiber Bragg grating 6, metallic film 7.Spectrometer 1 links to each other with the light output end of fiber optical circulator 3, the incident end of fiber optical circulator 3 links to each other with wideband light source 1, simultaneously the reflection end of fiber optical circulator 3 is connected to the Pass end of crest multiplexer 5, Reflect end and the pump light source of crest multiplexer 5 connect, and the Common of crest multiplexer end is connected with inclined optical fiber grating 6 one ends that are coated with metallic film.
In order to allow pump light source be coupled into covering the metallic film on tilted fiber Bragg grating surface is heated, choose wavelength and be in the radiation mode of tilted fiber Bragg grating and the pump light source in cladding mode zone.The pump power of pump light directly affects the measurement range of this windage scale, but concrete performance number its look the efficient and the required measurement range that are coupled into sensing head and adjust.
The working method of apparatus of the present invention is: the light that is sent by wideband light source enters sensing head by the crest multiplexer behind fiber optical circulator, and the tilted fiber Bragg grating in the sensing head can be with Prague mould reflected light spectrometer.And pump light can be coupled into sensing head by the crest multiplexer, is coupled into fibre cladding by the cladding mode of the tilted fiber Bragg grating of corresponding wavelength the metallic film that is plated in the surface is heated.Along with this section fiber optic temperature raises, the tilted fiber Bragg grating wavelength produces red shift.And extraneous different wind-force can allow the metal film temperature that reducing in various degree occurs, make the wavelength of tilted fiber Bragg grating produce in various degree blue shift, the bragg peak wavelength variations that is reflected back by spectrometer monitoring tilted fiber Bragg grating can demodulate the size of wind-force.
The key that apparatus of the present invention can be measured wind-force is: pump light source is in cladding mode and the radiation mode zone of tilted fiber Bragg grating, can be tilted Fiber Bragg Grating FBG and be coupled into metallic film on the covering effects on surface and heat and cause this fiber optic temperature to raise, so that the wavelength generation red shift of tilted fiber Bragg grating.And extraneous different wind-force can make the temperature of metallic film that reducing so that the wavelength of tilted fiber Bragg grating produces corresponding blue shift in various degree occurs.So only can obtain the relevant information of wind-force by the bragg peak wavelength of demodulation tilted fiber Bragg grating, for the wind-force measurement provides a kind of effective measuring method.
Claims (1)
1. optical fiber hot-wire windage scale based on tilted fiber Bragg grating, comprise spectrometer (1), wideband light source (2), fiber optical circulator (3), pump light source (4), wavelength division multiplexer (5), inclined optical fiber grating (6), metallic film (7), it is characterized in that: tilted fiber Bragg grating plating metal on surface film is as sensing head, the wavelength of pump light source is in radiation mode and the cladding mode zone of tilted fiber Bragg grating, its energy may be absorbed by metallic film and convert heat to, thereby make sensing head have the temperature that changes with wind-force, the bragg wavelength of temperature change tilted fiber Bragg grating is by wideband light source and spectrometer measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104046541A CN102981019A (en) | 2012-10-18 | 2012-10-18 | Optical fiber hot-wire type wind gage based on tilted fiber bragg grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104046541A CN102981019A (en) | 2012-10-18 | 2012-10-18 | Optical fiber hot-wire type wind gage based on tilted fiber bragg grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102981019A true CN102981019A (en) | 2013-03-20 |
Family
ID=47855231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104046541A Pending CN102981019A (en) | 2012-10-18 | 2012-10-18 | Optical fiber hot-wire type wind gage based on tilted fiber bragg grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102981019A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526227A (en) * | 2016-09-30 | 2017-03-22 | 南京大学 | Micro optical fiber coupler-based micro flow velocity sensor and measuring method thereof |
| CN110133320A (en) * | 2019-05-23 | 2019-08-16 | 暨南大学 | Plasma resonance optical fiber hot wire anemometer, detection system and method |
| CN110174527A (en) * | 2019-07-01 | 2019-08-27 | 哈尔滨理工大学 | A kind of hot type fiber grating wind speed wind direction sensor and detection method |
| CN110398610A (en) * | 2019-08-29 | 2019-11-01 | 山东省科学院激光研究所 | Current velocity testing method and optical fiber hot wire flow rate sensor probe |
| CN113075421A (en) * | 2021-03-22 | 2021-07-06 | 广东工业大学 | Hot-wire type wind speed sensor, preparation method and wind speed detection system |
| CN114414838A (en) * | 2021-12-20 | 2022-04-29 | 山东微感光电子有限公司 | Wind speed measurement system and method based on VCSEL wavelength demodulation and pulse light source heating |
| CN116754104A (en) * | 2023-08-14 | 2023-09-15 | 山东省科学院激光研究所 | Fiber bragg grating laser thermal field sensor and application method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871885A (en) * | 2010-06-08 | 2010-10-27 | 中国计量学院 | Manufacture method of tilted fiber grating hydrogen sensor based on optical catalytic oxidation |
| CN101871886A (en) * | 2010-06-08 | 2010-10-27 | 中国计量学院 | Method for manufacturing refractive index sensor and refractive index sensing device |
-
2012
- 2012-10-18 CN CN2012104046541A patent/CN102981019A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871885A (en) * | 2010-06-08 | 2010-10-27 | 中国计量学院 | Manufacture method of tilted fiber grating hydrogen sensor based on optical catalytic oxidation |
| CN101871886A (en) * | 2010-06-08 | 2010-10-27 | 中国计量学院 | Method for manufacturing refractive index sensor and refractive index sensing device |
Non-Patent Citations (1)
| Title |
|---|
| PAULO CALDAS ET AL: "Fiber optic hot-wire flowmeter based on a metallic coated hybrid long period grating/fiber Bragg grating structure", 《APPLIED OPTICS》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526227A (en) * | 2016-09-30 | 2017-03-22 | 南京大学 | Micro optical fiber coupler-based micro flow velocity sensor and measuring method thereof |
| CN106526227B (en) * | 2016-09-30 | 2019-01-29 | 南京大学 | Micro- flow sensor and its measurement method based on micro optical fiber coupler |
| CN110133320A (en) * | 2019-05-23 | 2019-08-16 | 暨南大学 | Plasma resonance optical fiber hot wire anemometer, detection system and method |
| CN110174527A (en) * | 2019-07-01 | 2019-08-27 | 哈尔滨理工大学 | A kind of hot type fiber grating wind speed wind direction sensor and detection method |
| CN110398610A (en) * | 2019-08-29 | 2019-11-01 | 山东省科学院激光研究所 | Current velocity testing method and optical fiber hot wire flow rate sensor probe |
| CN110398610B (en) * | 2019-08-29 | 2021-06-01 | 山东省科学院激光研究所 | Flow velocity detection method and probe of optical fiber hot wire flow velocity sensor |
| CN113075421A (en) * | 2021-03-22 | 2021-07-06 | 广东工业大学 | Hot-wire type wind speed sensor, preparation method and wind speed detection system |
| CN113075421B (en) * | 2021-03-22 | 2024-03-01 | 广东工业大学 | Hot-wire type wind speed sensor, preparation method and wind speed detection system |
| CN114414838A (en) * | 2021-12-20 | 2022-04-29 | 山东微感光电子有限公司 | Wind speed measurement system and method based on VCSEL wavelength demodulation and pulse light source heating |
| CN116754104A (en) * | 2023-08-14 | 2023-09-15 | 山东省科学院激光研究所 | Fiber bragg grating laser thermal field sensor and application method thereof |
| CN116754104B (en) * | 2023-08-14 | 2023-11-03 | 山东省科学院激光研究所 | Fiber bragg grating laser thermal field sensor and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102981019A (en) | Optical fiber hot-wire type wind gage based on tilted fiber bragg grating | |
| Liu et al. | Design and implementation of distributed ultra-high temperature sensing system with a single crystal fiber | |
| CN102301206B (en) | Fiber optic measuring apparatus | |
| CN101216351B (en) | Bimetal sheet type optical fiber microbending temperature sensor | |
| CN203605976U (en) | Distributed type optical fiber temperature and stress sensing device | |
| CN104316106A (en) | Optical fiber sensor based on Mach-Zehnder interference and fiber bragg grating | |
| CN103148956B (en) | One carries out thermometric device and method based on coating micro-nano fiber | |
| CN102735273B (en) | Optical fiber sensor based on Fabry-Perot cavity | |
| CN203657934U (en) | Reflection-type temperature/refractive index two-parameter sensing device employing long-period FBG based on Sagnac ring | |
| CN108445362A (en) | Shelf depreciation ultrasonic signal detecting system based on optical fiber sensing technology and method | |
| CN102853936A (en) | Remote distributed fiber Raman temperature sensor | |
| CN103714869A (en) | Fiber bragg grating sensing based system and method for monitoring reactor core temperature | |
| CN203224440U (en) | Humidity sensor based on multimode interference MSM (multilayer switch module) structure | |
| CN102980682B (en) | Self-correcting full distribution optical fiber raman temperature sensor | |
| CN203672333U (en) | Curvature sensor based on waist-enlarged welding fiber grating | |
| CN201903554U (en) | FBG (fiber Bragg grating) accelerometer using multimode interference SMS (single-mode, multimode and single-mode) structure as edge filter | |
| CN203785642U (en) | All-fiber bending sensor based on peanut-shaped structure | |
| CN103048064A (en) | Production method for solder-packaged optical fiber macrobending loss temperature sensor | |
| Datta et al. | Challenges and opportunities in distributed anti-Stokes Raman thermometry | |
| CN103575309B (en) | The straight cavity sensor frequency division multiplexing of single grating fibers multilongitudianl-mode laser device | |
| CN102095892B (en) | Fiber bragg grating acceleration transducer based on fabrication structure | |
| CN105806511A (en) | Micro optical fiber subminiature temperature sensor based on spherical cone serial structure | |
| CN1346972A (en) | Optical fibre high temp sensitive measuring method and device | |
| CN202770555U (en) | Remote distributed optical fiber Raman temperature sensor and annular area temperature measuring device | |
| CN202420557U (en) | Sensing device utilizing Brillouin optical time-domain analysis and Mach-Zehnder interference to carry out common detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130320 |