CN111413283B - Optical fiber gas sensor based on butterfly wing scales - Google Patents
Optical fiber gas sensor based on butterfly wing scales Download PDFInfo
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- CN111413283B CN111413283B CN202010273738.0A CN202010273738A CN111413283B CN 111413283 B CN111413283 B CN 111413283B CN 202010273738 A CN202010273738 A CN 202010273738A CN 111413283 B CN111413283 B CN 111413283B
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- optical fiber
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/25—Preparing the ends of light guides for coupling, e.g. cutting
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3869—Mounting ferrules to connector body, i.e. plugs
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
An optical fiber gas sensor based on butterfly wing scales belongs to the technical field of optical fiber sensing. The optical fiber sensor adopts a terminal reflection type sensing structure, two optical fiber end faces are polished, and one end face is aligned and then inserted into an FC joint for fixation; fixing the butterfly wing scales on the glass cover plate; fixing a glass cover plate to one end of the zirconia sleeve, wherein the butterfly wing scales face the inner side of the sleeve; and inserting the ceramic ferrule of the FC joint from the other end of the zirconia sleeve, wherein the distance between the end face of the optical fiber and the butterfly wing scale is 2-3 mm. The optical fiber is a plastic cladding multimode optical fiber, the diameter of a core layer is 300-600 mu m, and the numerical aperture is not less than 0.2. The zirconia sleeve is 11.4mm high, 2.5mm internal diameter, 3.2mm external diameter, and the side has a width 0.6 mm's opening. The sensor has the advantages of small volume, compact structure, firm packaging, stable sensing performance, simple manufacturing process, convenient operation, convenient replacement in later use and low cost.
Description
Technical Field
The invention belongs to the technical field of optical fiber sensing, and relates to an optical fiber gas sensor based on butterfly wing scales.
Background
Compared with an optical fiber gas sensor, the traditional gas sensor has the defects of large volume, complex structure, high cost, complex operation, weak anti-electromagnetic interference capability and the like, and is difficult to carry out real-time, on-site and on-line detection in industrial production; the prior optical fiber gas sensor is mainly based on photonic crystals, novel material (carbon nano tube and the like) films, gas-sensitive polymer film systems and other structures, the process is too complex, the production yield is low, and the stability is poor; although there is the optic fibre gas sensor based on biological template (butterfly wing scale etc.) to appear at present, but mostly split type structure, the distance, the angle of biological template and optic fibre are easily changed in the sensing test process, and biological template exposes outside simultaneously, easily suffers destruction, causes the testing result inaccurate to the volume is relatively great, is unfavorable for the application in narrow and small space.
Disclosure of Invention
The invention aims to provide an optical fiber gas sensor based on butterfly wing scales, which takes the butterfly wing scales as sensing materials and can effectively measure the gas environment of a region to be measured; the zirconia sleeve is used for connecting the light guide optical fiber and the butterfly wing scales, so that the volume of the sensor is effectively reduced, the sensor is more compact in structure and firmer in packaging, the distance and the angle between the butterfly wing scales and the optical fiber are always fixed in the sensing detection process, and the butterfly wing scales are packaged in the sleeve and are not easy to damage; the side surface of the zirconia sleeve is provided with an opening, so that gas can flow in and out conveniently.
The technical scheme of the invention is as follows:
an optical fiber gas sensor based on butterfly wing scales adopts a terminal reflection type sensing structure, two end faces of two optical fibers are polished, and one end face is aligned and then inserted into an FC joint to be fixed to serve as a reflection type probe; 2 multiplied by 2mm butterfly wing scales are fixed on a glass cover plate with the diameter of 3 mm; a glass cover plate with butterfly wing scales is fixed to one end of the zirconia sleeve, and the butterfly wing scales face the inner side of the zirconia sleeve; and a ceramic ferrule of the FC joint is inserted from the other end of the zirconia sleeve, and the distance between the end face of the optical fiber and the butterfly wing scale is 2-3 mm.
The adopted optical fiber is a plastic cladding multimode optical fiber, the diameter of a core layer is 300-600 mu m, and the numerical aperture is not less than 0.2.
The height of the adopted zirconia casing is 11.4mm, the inner diameter is 2.5mm, the outer diameter is 3.2mm, and the side surface is provided with an opening with the width of 0.6 mm.
The invention adopts multimode optical fiber to transmit signals. Wide spectrum light emitted by a halogen tungsten lamp light source enters the reflective butterfly wing scale optical fiber gas sensor from one end of the lead-in optical fiber, interference, diffraction and scattering occur on the surface of the butterfly wing scale, the spectrum information of a sensing signal changes along with the change of an external gas environment, and the sensing signal is transmitted into the optical fiber spectrometer for signal demodulation through the lead-out optical fiber.
The invention has the advantages that:
the butterfly wing scales are used as sensing substrates, the micro-nano structures on the butterfly wing scales are of naturally formed photonic crystal structures, the butterfly wing scales have extremely good gas sensitivity, and the optical fiber gas sensor based on the butterfly wing scales can be used for effectively measuring the gas environment of a region to be measured; the zirconia sleeve is used for connecting the light guide optical fiber and the butterfly wing scales, so that the sensor is small in size, compact in structure, firm in packaging and stable in sensing performance; the sensor has the advantages of simple manufacturing process, convenient operation, convenient replacement in later use and low cost.
Drawings
FIG. 1 is a schematic structural diagram of an optical fiber gas sensor based on butterfly wing scales.
Fig. 2 is a sectional view taken along a-a in fig. 1.
FIG. 3 is a cross-sectional view of a zirconia bushing A-A.
Fig. 4 is a top view of a zirconia bushing.
In the figure: 1 plastic cladding multimode fiber; a 2FC connector; 3, a zirconium oxide sleeve; 4, a glass cover plate; 5 butterfly wing scales; 6 the side of the zirconia sleeve is open.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings.
The invention adopts the plastic cladding optical fiber, and the data of the optical fiber are respectively as follows: the core diameter is 400 μm, the cladding diameter is 430 μm, the coating diameter is 730 μm, and the numerical aperture is 0.37.
The manufacturing process of the invention is as follows:
1) taking two plastic cladding multimode fibers 50cm, and polishing the end faces of the two sides of each fiber by using a fiber grinder; and aligning one ends of the two optical fibers, inserting the aligned optical fibers into the FC joint, and fixing the aligned optical fibers by using optical fiber curing glue to manufacture the reflective probe.
2) A2 x 2mm butterfly wing scale is taken by a blade, a glass cover plate with the diameter of 3mm is taken by a glass cutter, and the butterfly wing scale is fixed in the center of the glass cover plate by optical fiber curing glue.
3) And fixing a glass cover plate with butterfly wing scales to one end of the zirconia sleeve by using optical fiber curing glue, wherein the butterfly wing scales face the inner side of the sleeve and are positioned in the center.
4) And slowly inserting the ceramic ferrule of the FC joint from the other end of the zirconia sleeve to ensure that the distance between the end face of the optical fiber and the butterfly wing scale is 2-3 mm.
Claims (1)
1. An optical fiber gas sensor based on butterfly wing scales is characterized in that the optical fiber gas sensor adopts a terminal reflection type sensing structure, two end faces of two optical fibers are polished, and one end face is aligned and then inserted into an FC joint to be fixed as a reflection type probe;
scale fixing diameter of butterfly wing
The glass cover sheet of (1); a glass cover plate with butterfly wing scales is fixed to one end of the zirconia sleeve, and the butterfly wing scales face the inner side of the zirconia sleeve; inserting a ceramic ferrule of the FC joint from the other end of the zirconia sleeve, wherein the distance between the end face of the optical fiber and the butterfly wing scale is 2-3 mm; the optical fiber is plastic clad multimode fiber with core layer diameter of
The numerical aperture is not less than 0.2; the height of the adopted zirconia casing pipe is 11.4mm, the inner diameter is 2.5mm, the outer diameter is 3.2mm, and the side surface is provided with an opening with the width of 0.6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010273738.0A CN111413283B (en) | 2020-04-09 | 2020-04-09 | Optical fiber gas sensor based on butterfly wing scales |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010273738.0A CN111413283B (en) | 2020-04-09 | 2020-04-09 | Optical fiber gas sensor based on butterfly wing scales |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111413283A CN111413283A (en) | 2020-07-14 |
| CN111413283B true CN111413283B (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010273738.0A Active CN111413283B (en) | 2020-04-09 | 2020-04-09 | Optical fiber gas sensor based on butterfly wing scales |
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Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7167622B2 (en) * | 2004-04-08 | 2007-01-23 | Omniguide, Inc. | Photonic crystal fibers and medical systems including photonic crystal fibers |
| US8164748B1 (en) * | 2006-11-30 | 2012-04-24 | Axsun Technologies, Inc. | Widely-tuned semiconductor laser based gas liquid solid analysis system |
| CN201047882Y (en) * | 2007-03-27 | 2008-04-16 | 李俊 | Zirconia ceramic sleeve |
| CN102173793B (en) * | 2011-03-16 | 2013-04-24 | 辽宁爱尔创生物材料有限公司 | Zirconia ceramic casing pipe and preparation process thereof |
| CN103063574B (en) * | 2012-12-21 | 2014-10-29 | 安徽大学 | Membrane-type minitype photoacoustic cell and application thereof |
| CN103557929B (en) * | 2013-11-14 | 2015-11-11 | 北京航空航天大学 | A kind of Fabry-perot optical fiber sound pressure sensor method for making based on graphene film and measuring method, device |
| CN103792201B (en) * | 2014-02-26 | 2015-11-25 | 安徽大学 | A kind of light pressure sensor and detection method thereof detecting multicomponent gas |
| DE102015221789A1 (en) * | 2015-11-06 | 2017-05-11 | Robert Bosch Gmbh | Absorption spectroscopic sensor arrangement and method for determining a substance concentration in a gaseous medium |
| CN105300898A (en) * | 2015-11-17 | 2016-02-03 | 吉林大学 | Device for measuring gas response reflection spectrum of butterfly wing scales |
| CN105445678B (en) * | 2015-11-23 | 2018-09-04 | 大连理工大学 | Magnetic field sensor based on fiber reflection formula surface plasma body resonant vibration |
| CN105973807A (en) * | 2016-06-01 | 2016-09-28 | 浙江工商大学 | Optical fiber sensing probe for detecting gas and liquid |
| CN112352176B (en) * | 2018-05-04 | 2023-09-12 | 努布鲁有限公司 | Three-clad optical fiber |
| CN110231104B (en) * | 2019-06-03 | 2021-02-26 | 南昌大学 | F-P optical fiber high-temperature sensor based on in-situ electroplating and preparation method thereof |
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2020
- 2020-04-09 CN CN202010273738.0A patent/CN111413283B/en active Active
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