CN109444079A - A kind of optical fiber oxygen determination gas sensor - Google Patents
A kind of optical fiber oxygen determination gas sensor Download PDFInfo
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- CN109444079A CN109444079A CN201811516209.8A CN201811516209A CN109444079A CN 109444079 A CN109444079 A CN 109444079A CN 201811516209 A CN201811516209 A CN 201811516209A CN 109444079 A CN109444079 A CN 109444079A
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- oxygen
- optical fiber
- butterfly
- gas
- spectrometer
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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
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/72—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving blood pigments, e.g. haemoglobin, bilirubin or other porphyrins; involving occult blood
- G01N33/721—Haemoglobin
-
- 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
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
- G01N2021/458—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods using interferential sensor, e.g. sensor fibre, possibly on optical waveguide
Abstract
The invention discloses a kind of optical fiber oxygen determination gas sensors, by wideband light source, gas chamber, venthole, air inlet, butterfly cone, the quick film of oxygen, spectrometer, oxygen cylinder, nitrogen cylinder, gas flowmeter, femto-second laser and fiber grating composition, the specifically used hemoglobin of the quick film of oxygen, film plating process are optical fiber photo-thermal method；Using fiber grating made of twin-core thin-core fibers, temperature compensation function is provided to entire sensor, eliminates influence of the temperature to sensor；Single mode optical fiber is processed using femto-second laser and makes butterfly wimble structure on optical fiber splicer, and the cladding thickness of the structure will be thinner than common butterfly wimble structure, is able to ascend the sensing capabilities of structure.When measurement, the quick film hemoglobin of oxygen combination oxygen, its effective refractive index changes at this time.The change of effective refractive index will lead to the interference peaks variation of interference spectrum on spectrometer, can be detected to the concentration of oxygen by the variation of interference peaks on observation spectrometer.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, and in particular to a kind of optical fiber oxygen determination gas sensor technical field.
Background technique
Fibre optical sensor due to its flexible design, electromagnetism interference is strong the advantages that paid close attention to by vast researcher.It is close
Nian Lai, Curvature Optical Fiber Sensor are pushed out on major periodical, the impetus of wherein most researcher all improve or
Person proposes new interference structure.Butterfly wimble structure is a kind of novel interference structure, but the sensitivity of single butterfly wimble structure
It is not high.
The breathing of aerobic cell provides oxygen and nutrition dependent on mitochondria；In fact, from environment to subcellular environment
The cascade interruption of oxygen can lead to anoxic.Effective oxygen conveying depends on the coordination phase interaction between respiratory system and the circulatory system
With.Therefore, measure local PtO2's (oxygen tension) can provide about the availability of oxygen in tissue level and
The important information of balance between the conveying of given time partial oxygen and consumption.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of optical fiber oxygen determination gas sensors, use thin
FBG made of core fibre provides temperature compensation function to sensor, is made after single mode optical fiber is processed using femto-second laser
Butterfly wimble structure improves the sensing capabilities of butterfly cone, can be to oxygen by the variation of interference peaks in observation spectrometer (7)
Concentration is detected.
The invention is realized by the following technical scheme: a kind of optical fiber oxygen determination gas sensor, by wideband light source (1), gas chamber
(2), venthole (3), air inlet (4), butterfly bore (5), the quick film of oxygen (6), spectrometer (7), oxygen cylinder (8), nitrogen cylinder (9), gas
Flowmeter body (10), femto-second laser (11) and fiber grating (12) composition, it is characterised in that: the right end of wideband light source (1) with
The left end that butterfly bores (5) is connected, and the right end of butterfly cone (5) is connected with spectrometer (7), and butterfly cone (5) is placed on the interior of gas chamber (2)
Portion, oxygen cylinder (8) are connected with the port 1 of gas flowmeter (10), and nitrogen cylinder (9) is connected with the port 2 of gas flowmeter (10),
The output end of gas flowmeter (10) is connected with the air inlet (4) of gas chamber (2), and the quick film of oxygen (6) is hemoglobin sensitive membrane, uses
Optical fiber photo-thermal method carries out plated film to optical fiber；Energy is gathered in apart from the past inside in fibre cladding surface using femto-second laser (11)
At 20 microns, while spin fiber, the annular recess that a depth is 20 microns is processed in optical fiber surface, then translates single mode
Optical fiber continues aforesaid operations, so that annular recess is being 200 microns along the length on optical fiber axial direction direction；By finished light
Fibre carries out welding butterfly cone (5) on optical fiber splicer, bores one fiber grating (12) of (5) right end welding, Ke Yiyong in butterfly
In temperature-compensating and calibration, the temperature-insensitive of sensor is realized；Fiber grating (12) made using twin-core thin-core fibers and
At length 1cm, screen periods are 500 nanometers, reflectivity 0.001, are weak reflecting grating；Twin-core thin-core fibers core diameter is 2
Micron, distance is 5 microns between two cores.
The working principle of the invention is: in order to promote butterfly wimble structure to extraneous sensitivity, first to single mode optical fiber
(SMF-28) it is handled.Using femto-second laser, energy is gathered at past 20 microns of the inside in fibre cladding surface, together
When spin fiber, can process a depth in optical fiber surface is 20 microns of annular recess, then translates single mode optical fiber
Aforesaid operations are continued in position, so that annular recess is being 200 microns along the length on optical fiber axial direction direction.It then will be processed
Optical fiber welding butterfly wimble structure is carried out on optical fiber splicer.Cone area's cladding thickness at this time will be bored than common butterfly
Structure is thinner, is able to ascend the sensing capabilities of structure.
Gas in oxygen cylinder (8) and nitrogen cylinder (9) controls the flow that respectively exports by gas flowmeter to be formed
After mixed gas, gas chamber (2) are entered by the air inlet (4) of gas chamber (2).Oxygen in mixed gas is integrated to the quick film of oxygen (6)
Above hemoglobin, the effective refractive index of the quick film of oxygen (6) is changed.The change of effective refractive index will will lead on spectrometer (7)
The interference peaks of interference spectrum change, and can be detected to the concentration of oxygen by the variation of interference peaks in observation spectrometer (7).
The beneficial effects of the present invention are: using fiber grating made of twin-core thin-core fibers, it to be used for temperature-compensating and mark
It is fixed, realize the temperature-insensitive of sensor；Single mode optical fiber is processed to make butterfly wimble structure using femto-second laser, is improved
The sensing capabilities of butterfly wimble structure；The quick film of oxygen, specific binding capacity of the substance to oxygen are made using hemoglobin
By force；Oxygen determination gas sensor is made using optical fiber, it is at low cost, it is small in size, it is provided for optical fiber oxygen determination gas sensor a kind of practical
Feasible scheme, it is simple and easy, it is convenient and reliable.
Detailed description of the invention
Fig. 1 is a kind of system diagram of optical fiber oxygen determination gas sensor.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
Referring to attached drawing 1, the invention is realized by the following technical scheme: a kind of optical fiber oxygen determination gas sensor, by wideband light source
(1), gas chamber (2), venthole (3), air inlet (4), butterfly bore (5), the quick film of oxygen (6), spectrometer (7), oxygen cylinder (8), nitrogen
Bottle (9), gas flowmeter (10), femto-second laser (11) and fiber grating (12) composition, it is characterised in that: wideband light source (1)
The left end of right end and butterfly cone (5) be connected, the right end of butterfly cone (5) is connected with spectrometer (7), and butterfly bores (5) and is placed on gas
The inside of room (2), oxygen cylinder (8) are connected with the port 1 of gas flowmeter (10), nitrogen cylinder (9) and gas flowmeter (10)
Port 2 is connected, and the output end of gas flowmeter (10) is connected with the air inlet (4) of gas chamber (2), and the quick film of oxygen (6) is hemoglobin
Sensitive membrane carries out plated film to optical fiber using optical fiber photo-thermal method；Energy is gathered in apart from optical fiber packet using femto-second laser (11)
At past 20 microns of the inside of layer surface, while spin fiber, the annular recess that a depth is 20 microns is processed in optical fiber surface,
Then translation single mode optical fiber continues aforesaid operations, so that annular recess is being 200 microns along the length on optical fiber axial direction direction；
Finished optical fiber is subjected to welding butterfly cone (5) on optical fiber splicer, bores one fiber grating of (5) right end welding in butterfly
(12), it can be used for temperature-compensating and calibration, realize the temperature-insensitive of sensor；Fiber grating (12) uses the thin core of twin-core
Optical fiber fabrication forms, length 1cm, and screen periods are 500 nanometers, reflectivity 0.001, is weak reflecting grating；The thin core of twin-core
Optical fiber core diameter is 2 microns, and distance is 5 microns between two cores.
The working principle of the invention is: in order to promote butterfly wimble structure to extraneous sensitivity, first to single mode optical fiber
(SMF-28) it is handled.Using femto-second laser, energy is gathered at past 20 microns of the inside in fibre cladding surface, together
When spin fiber, can process a depth in optical fiber surface is 20 microns of annular recess, then translates single mode optical fiber
Aforesaid operations are continued in position, so that annular recess is being 200 microns along the length on optical fiber axial direction direction.It then will be processed
Optical fiber welding butterfly wimble structure is carried out on optical fiber splicer.Cone area's cladding thickness at this time will be bored than common butterfly
Structure is thinner, is able to ascend the sensing capabilities of structure.
Gas in oxygen cylinder (8) and nitrogen cylinder (9) controls the flow that respectively exports by gas flowmeter to be formed
After mixed gas, gas chamber (2) are entered by the air inlet (4) of gas chamber (2).Oxygen in mixed gas is integrated to the quick film of oxygen (6)
Above hemoglobin, the effective refractive index of the quick film of oxygen (6) is changed.The change of effective refractive index will will lead on spectrometer (7)
The interference peaks of interference spectrum change, and can be detected to the concentration of oxygen by the variation of interference peaks in observation spectrometer (7).
The beneficial effects of the present invention are: using fiber grating made of twin-core thin-core fibers, it to be used for temperature-compensating and mark
It is fixed, realize the temperature-insensitive of sensor；Single mode optical fiber is processed to make butterfly wimble structure using femto-second laser, is improved
The sensing capabilities of butterfly wimble structure；The quick film of oxygen, specific binding capacity of the substance to oxygen are made using hemoglobin
By force；Oxygen determination gas sensor is made using optical fiber, it is at low cost, it is small in size, it is provided for optical fiber oxygen determination gas sensor a kind of practical
Feasible scheme, it is simple and easy, it is convenient and reliable.
Claims (1)
1. a kind of optical fiber oxygen determination gas sensor, by wideband light source (1), gas chamber (2), venthole (3), air inlet (4), butterfly cone
(5), the quick film of oxygen (6), spectrometer (7), oxygen cylinder (8), nitrogen cylinder (9), gas flowmeter (10), femto-second laser (11) and light
Fine grating (12) composition, it is characterised in that: the right end of wideband light source (1) is connected with the left end of butterfly cone (5), and butterfly bores (5)
Right end is connected with spectrometer (7), and butterfly cone (5) is placed on the inside of gas chamber (2), oxygen cylinder (8) and gas flowmeter (10)
Port 1 is connected, and nitrogen cylinder (9) is connected with the port 2 of gas flowmeter (10), the output end and gas chamber of gas flowmeter (10)
(2) air inlet (4) is connected, and the quick film of oxygen (6) is hemoglobin sensitive membrane, carries out plated film to optical fiber using optical fiber photo-thermal method；Make
Energy is gathered at past 20 microns of the inside in fibre cladding surface with femto-second laser (11), while spin fiber, in light
Fine surface processes the annular recess that a depth is 20 microns, then translates single mode optical fiber and continues aforesaid operations, so that cyclic annular
Recess is being 200 microns along the length on optical fiber axial direction direction；Finished optical fiber is subjected to welding on optical fiber splicer
Butterfly bores (5), bores one fiber grating (12) of (5) right end welding in butterfly, can be used for temperature-compensating and calibration, realize sensing
The temperature-insensitive of device；Fiber grating (12) is made using twin-core thin-core fibers, length 1cm, screen periods 500
Nanometer, reflectivity 0.001 are weak reflecting grating；Twin-core thin-core fibers core diameter is 2 microns, and distance is 5 microns between two cores；
Gas in oxygen cylinder (8) and nitrogen cylinder (9) controls the flow that respectively exports by gas flowmeter to form mixed gas
Afterwards, gas chamber (2) are entered by the air inlet (4) of gas chamber (2)；Oxygen in mixed gas is integrated to the quick film of oxygen (6) hemoglobin
Above, the effective refractive index of the quick film of oxygen (6) is changed；The change of effective refractive index will will lead to interference spectrum on spectrometer (7)
Interference peaks variation, the concentration of oxygen can be detected by the variation of interference peaks in observation spectrometer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811516209.8A CN109444079B (en) | 2018-12-12 | 2018-12-12 | Optical fiber oxygen measuring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811516209.8A CN109444079B (en) | 2018-12-12 | 2018-12-12 | Optical fiber oxygen measuring sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109444079A true CN109444079A (en) | 2019-03-08 |
| CN109444079B CN109444079B (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811516209.8A Active CN109444079B (en) | 2018-12-12 | 2018-12-12 | Optical fiber oxygen measuring sensor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4417815A (en) * | 1980-12-17 | 1983-11-29 | Imperial Chemical Industries Plc | Measuring apparatus |
| US20130294975A1 (en) * | 2012-04-24 | 2013-11-07 | Korea Institute Of Science And Technology | Fiber optic apparatus for oxygen sensing |
| CN104931458A (en) * | 2015-06-24 | 2015-09-23 | 中国计量学院 | MZI (Mach-Zehnder interferometer) hydrogen sensor based on fiber brag grating microcavity |
| CN106546274A (en) * | 2016-10-19 | 2017-03-29 | 暨南大学 | Thin-core fibers bragg grating temperature and strain transducer and its detection method |
-
2018
- 2018-12-12 CN CN201811516209.8A patent/CN109444079B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4417815A (en) * | 1980-12-17 | 1983-11-29 | Imperial Chemical Industries Plc | Measuring apparatus |
| US20130294975A1 (en) * | 2012-04-24 | 2013-11-07 | Korea Institute Of Science And Technology | Fiber optic apparatus for oxygen sensing |
| CN104931458A (en) * | 2015-06-24 | 2015-09-23 | 中国计量学院 | MZI (Mach-Zehnder interferometer) hydrogen sensor based on fiber brag grating microcavity |
| CN106546274A (en) * | 2016-10-19 | 2017-03-29 | 暨南大学 | Thin-core fibers bragg grating temperature and strain transducer and its detection method |
Non-Patent Citations (1)
| Title |
|---|
| 李辉栋;傅海威;邵敏;赵娜;乔学光;刘颖刚;李岩;闫旭;: "基于光纤气泡和纤芯失配的Mach-Zehnder干涉液体折射率传感器", 物理学报, no. 21 * |
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| Publication number | Publication date |
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| CN109444079B (en) | 2023-08-01 |
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