CN108362665A - A kind of combination microstructured optical fibers and micro-fluidic acidometer - Google Patents
A kind of combination microstructured optical fibers and micro-fluidic acidometer Download PDFInfo
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- CN108362665A CN108362665A CN201810242865.7A CN201810242865A CN108362665A CN 108362665 A CN108362665 A CN 108362665A CN 201810242865 A CN201810242865 A CN 201810242865A CN 108362665 A CN108362665 A CN 108362665A
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- Prior art keywords
- optical fibers
- microstructured optical
- fiber
- acidometer
- fluidic
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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
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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
- 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
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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
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/08—Optical fibres; light guides
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of combination microstructured optical fibers and micro-fluidic acidometer, by wideband light source, single mode optical fiber, microstructured optical fibers, fiber spectrometer, long-period fiber grating, sensitive membrane sample introduction conduit and goes out sample conduit composition.Long-period fiber grating is inscribed on the fibre core of microstructured optical fibers first, then deposited polyethylene alcohol/polyacrylic acid composite membrane in its airport, and on-line checking is carried out to the pH of sample to be tested using the airport as microchannel.The acid-base value of sample to be tested causes the change of the refractive index of polyvinyl alcohol/polyacrylic acid composite membrane, the wavelength of long-period fiber grating transmission peaks to be drifted about therewith, thus constitutes a kind of optical fiber acidometer of structure novel.The outstanding advantages of the present invention are high sensitivity, compact-sized, and are a kind of on-line checking schemes being easily achieved multimetering.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, and in particular to a kind of combination microstructured optical fibers and micro-fluidic acidity
Meter.
Background technology
The measurement and control of pH is widely used in the fields such as biochemistry, clinical chemistry and environmental science.Currently,
Electronics acidometer（PH meter）Because easy to operate and significant price advantage occupies staple market, basic principle be measure hydrogen from
Son is in glass electrode and compares the potential difference generated between electrode, but this design is difficult to carry out pH measurements to micro liquid, and
And it is unfavorable for carrying out real-time online detection to testing liquid.
In recent years, optical fiber pH sensor is small with its, at low cost, the response time is short, it is easy to accomplish on-line checking etc. is excellent
Point causes the concern of domestic and international researcher, and it is latent to have larger application in the monitoring of chemical reaction course in particular circumstances
Power.
Invention content
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of combination microstructured optical fibers and micro-fluidic acid
Degree meter.Long-period fiber grating is inscribed on the fibre core of microstructured optical fibers first, then in its airport deposited polyethylene alcohol/
Polyacrylic acid composite membrane, and on-line checking is carried out to the pH of sample to be tested using the airport as microchannel.Sample to be tested
Acid-base value causes the change of the refractive index of polyvinyl alcohol/polyacrylic acid composite membrane, the wavelength of long-period fiber grating transmission peaks with
It drifts about, thus constitutes a kind of optical fiber acidometer of structure novel.The design has compact-sized, and detection is quick, cost
Low outstanding advantages.
The invention is realized by the following technical scheme：A kind of combination microstructured optical fibers and micro-fluidic acidometer are by broadband light
Source（1）, single mode optical fiber（2）, microstructured optical fibers（3）, fiber spectrometer（4）, long-period fiber grating（5）, sensitive membrane（6）, into
Sample conduit（7）With go out sample conduit（8）Composition；Wideband light source（1）Pass through single mode optical fiber（2）With microstructured optical fibers（3）Left end phase
Even, microstructured optical fibers（3）Right end pass through single mode optical fiber（2）With fiber spectrometer（4）It is connected；Wherein, microstructured optical fibers（3）'s
Both ends are and single mode optical fiber（2）Dislocation welding, microstructured optical fibers（3）Partial air hole is exposed and its hole wall plated with sensitive film
（6）, long-period fiber grating（5）It is scribed at microstructured optical fibers（3）Fibre core on；Sample introduction conduit（7）With go out sample conduit（8）Respectively
With microstructured optical fibers（3）The exposed airport in both ends is connected.
The microstructured optical fibers（3）It is 40 μm ~ 50 μm of fan-shaped airport, fibre external diameters 125 that, which there are 3 radiuses in inside,
μm, fiber lengths are 10mm ~ 20mm.
The sensitive membrane（6）For polyvinyl alcohol/polyacrylic acid composite membrane, film thickness is 5 μm ~ 10 μm.
The present invention operation principle be：Microstructured optical fibers（3）Fibre core have certain doping concentration, in carbon dioxide laser
Scanning under fiber core refractive index by periodic modulation, form long-period fiber grating（5）.In microstructured optical fibers（3）Part
Deposited polyethylene alcohol/polyacrylic acid composite membrane is as sensitive membrane in airport（6）, the refractive index of the film is sensitive to acid-base value.
Microstructured optical fibers（3）With single mode optical fiber（2）Between dislocation welding with exposed hole wall plated with sensitive film（6）Airport, sample introduction leads
Pipe（7）With go out sample conduit（8）The flow channel of sample has been connected to form with the airport respectively.When sample to be tested flows through, acid
Basicity causes sensitive membrane（6）The variation of refractive index changes the effective refractive index of long-period fiber grating cladding mode, to spectrum
The centre wavelength of middle transmission peaks is drifted about, fiber spectrometer（4）Monitoring wavelength shift demodulates the pH value of sample.
The beneficial effects of the invention are as follows：（1）The sensitivity of long-period grating pair ambient refractive index is very high, the design
It is all higher to the sensitivity and resolution ratio of pH measurement；（2）Using the airport of microstructured optical fibers as microchannel, not only pass
The volume of sensor is compared PDMS chips and is substantially reduced, and cost is far below common micro-fluidic chip；（3）Multiple microchannels
It connects on optical fiber and the long-period fiber grating for inscribing different centre wavelengths can be formed directly in multiple spot and measure in real time.Therefore, originally
The outstanding advantages of invention are high sensitivity, compact-sized, and are a kind of on-line checking schemes being easily achieved multimetering.
Description of the drawings
Fig. 1 is a kind of system structure diagram of combination microstructured optical fibers and micro-fluidic acidometer.
Fig. 2 is a kind of cross-sectional view of combination microstructured optical fibers and microstructured optical fibers in micro-fluidic acidometer.
Specific implementation mode
Present invention is further described in detail with specific implementation mode below in conjunction with the accompanying drawings.
Referring to attached drawing 1, a kind of combination microstructured optical fibers and micro-fluidic acidometer are by wideband light source（1）, single mode optical fiber
（2）, microstructured optical fibers（3）, fiber spectrometer（4）, long-period fiber grating（5）, sensitive membrane（6）, sample introduction conduit（7）With go out sample
Conduit（8）Composition；Wideband light source（1）Pass through single mode optical fiber（2）With microstructured optical fibers（3）Left end be connected, microstructured optical fibers（3）
Right end pass through single mode optical fiber（2）With fiber spectrometer（4）It is connected；Wherein, microstructured optical fibers（3）Both ends and single mode optical fiber
（2）Dislocation welding, microstructured optical fibers（3）Partial air hole is exposed and its hole wall plated with sensitive film（6）, long-period fiber grating
（5）It is scribed at microstructured optical fibers（3）Fibre core on；Sample introduction conduit（7）With go out sample conduit（8）Respectively with microstructured optical fibers（3）Two
Exposed airport is held to be connected.
Further, referring to attached drawing 2, the microstructured optical fibers（3）It is 40 μm ~ 50 μm of sector that, which there are 3 radiuses in inside,
Airport, fibre external diameters are 125 μm, and fiber lengths are 10mm ~ 20mm.The sensitive membrane（6）For polyvinyl alcohol/polyacrylic acid
Composite membrane, film thickness are 5 μm ~ 10 μm.
Sensitive membrane（6）Film plating process be first by volume 2：1, mixing quality score be 10% polyvinyl alcohol,
Polyacrylic acid aqueous solution persistently stirs 30 minutes at 60 c.Before connecting conduit, mixed liquor is dropped in the light of preparation
In fine structure, polyvinyl alcohol and polyacrylic acid enter with the capillarity of dampening in exposed airport, and then heating optical fiber is waved
Shampoo point, sensitive membrane（6）It is deposited on tube wall.Deposition process is repeated several times and reaches expected film thickness.Finally fix sample introduction conduit
（7）With go out sample conduit（8）, coating process is completed in injection deionized water flushing out air hole.
Claims (3)
1. a kind of combination microstructured optical fibers and micro-fluidic acidometer, it is characterised in that：By wideband light source（1）, single mode optical fiber
（2）, microstructured optical fibers（3）, fiber spectrometer（4）, long-period fiber grating（5）, sensitive membrane（6）, sample introduction conduit（7）With go out sample
Conduit（8）Composition；Wideband light source（1）Pass through single mode optical fiber（2）With microstructured optical fibers（3）Left end be connected, microstructured optical fibers（3）
Right end pass through single mode optical fiber（2）With fiber spectrometer（4）It is connected；Wherein, microstructured optical fibers（3）Both ends and single mode optical fiber
（2）Dislocation welding, microstructured optical fibers（3）Partial air hole is exposed and its hole wall plated with sensitive film（6）, long-period fiber grating
（5）It is scribed at microstructured optical fibers（3）Fibre core on；Sample introduction conduit（7）With go out sample conduit（8）Respectively with microstructured optical fibers（3）Two
Exposed airport is held to be connected.
2. a kind of combination microstructured optical fibers according to claim 1 and micro-fluidic acidometer, it is characterised in that：Described
Microstructured optical fibers（3）It is 40 μm ~ 50 μm of fan-shaped airport that, which there are 3 radiuses in inside, and fibre external diameters are 125 μm, and fiber lengths are
10mm~20mm。
3. a kind of combination microstructured optical fibers according to claim 1 and micro-fluidic acidometer, it is characterised in that：Described
Sensitive membrane（6）For polyvinyl alcohol/polyacrylic acid composite membrane, film thickness is 5 μm ~ 10 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810242865.7A CN108362665A (en) | 2018-03-23 | 2018-03-23 | A kind of combination microstructured optical fibers and micro-fluidic acidometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810242865.7A CN108362665A (en) | 2018-03-23 | 2018-03-23 | A kind of combination microstructured optical fibers and micro-fluidic acidometer |
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| Publication Number | Publication Date |
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| CN108362665A true CN108362665A (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810242865.7A Pending CN108362665A (en) | 2018-03-23 | 2018-03-23 | A kind of combination microstructured optical fibers and micro-fluidic acidometer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109225364A (en) * | 2018-02-05 | 2019-01-18 | 首慈康健养老有限公司 | Portable micro-fluidic chip, detection device and micro-fluidic detection method |
| CN109406528A (en) * | 2018-09-07 | 2019-03-01 | 昆明理工大学 | It is a kind of for detecting the fibre-optical sensing device and its temperature-compensation method of reinforcement corrosion |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6035082A (en) * | 1998-03-16 | 2000-03-07 | Luna Innovations, Inc. | Process for preparing an optical fiber sensor with enhanced sensitivity |
| CN102980685A (en) * | 2012-12-06 | 2013-03-20 | 天津理工大学 | Cascade long-period pohotonic crystal fiber grating temperature sensor |
| CN103033489A (en) * | 2012-12-14 | 2013-04-10 | 中国计量学院 | PH value sensor based on tilted fiber Bragg grating girdle amplification welding technology |
| CN203025081U (en) * | 2012-10-26 | 2013-06-26 | 中国计量学院 | Volatile organic compound sensor based on long-period optical grating of photonic crystal fiber |
| CN103439298A (en) * | 2013-07-02 | 2013-12-11 | 天津大学 | Chlorine ion concentration sensor and measurement system thereof |
| CN103940530A (en) * | 2014-03-21 | 2014-07-23 | 哈尔滨工程大学 | Temperature sensor based on hollow annular waveguide optical fiber |
| CN104880435A (en) * | 2015-05-25 | 2015-09-02 | 重庆理工大学 | Sensing device for measuring TNT explosives |
| CN207992054U (en) * | 2018-03-23 | 2018-10-19 | 中国计量大学 | A kind of combination microstructured optical fibers and micro-fluidic acidometer |
-
2018
- 2018-03-23 CN CN201810242865.7A patent/CN108362665A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6035082A (en) * | 1998-03-16 | 2000-03-07 | Luna Innovations, Inc. | Process for preparing an optical fiber sensor with enhanced sensitivity |
| CN203025081U (en) * | 2012-10-26 | 2013-06-26 | 中国计量学院 | Volatile organic compound sensor based on long-period optical grating of photonic crystal fiber |
| CN102980685A (en) * | 2012-12-06 | 2013-03-20 | 天津理工大学 | Cascade long-period pohotonic crystal fiber grating temperature sensor |
| CN103033489A (en) * | 2012-12-14 | 2013-04-10 | 中国计量学院 | PH value sensor based on tilted fiber Bragg grating girdle amplification welding technology |
| CN103439298A (en) * | 2013-07-02 | 2013-12-11 | 天津大学 | Chlorine ion concentration sensor and measurement system thereof |
| CN103940530A (en) * | 2014-03-21 | 2014-07-23 | 哈尔滨工程大学 | Temperature sensor based on hollow annular waveguide optical fiber |
| CN104880435A (en) * | 2015-05-25 | 2015-09-02 | 重庆理工大学 | Sensing device for measuring TNT explosives |
| CN207992054U (en) * | 2018-03-23 | 2018-10-19 | 中国计量大学 | A kind of combination microstructured optical fibers and micro-fluidic acidometer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109225364A (en) * | 2018-02-05 | 2019-01-18 | 首慈康健养老有限公司 | Portable micro-fluidic chip, detection device and micro-fluidic detection method |
| CN109406528A (en) * | 2018-09-07 | 2019-03-01 | 昆明理工大学 | It is a kind of for detecting the fibre-optical sensing device and its temperature-compensation method of reinforcement corrosion |
| CN109406528B (en) * | 2018-09-07 | 2021-03-02 | 昆明理工大学 | Optical fiber sensing device for detecting corrosion of steel bar and temperature compensation method thereof |
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