CN1057904A - Light filtering ammonia sensitive optical fibre sensor - Google Patents
Light filtering ammonia sensitive optical fibre sensor Download PDFInfo
- Publication number
- CN1057904A CN1057904A CN 91104592 CN91104592A CN1057904A CN 1057904 A CN1057904 A CN 1057904A CN 91104592 CN91104592 CN 91104592 CN 91104592 A CN91104592 A CN 91104592A CN 1057904 A CN1057904 A CN 1057904A
- Authority
- CN
- China
- Prior art keywords
- thin film
- tin dioxide
- dioxide thin
- optical
- sensor
- 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.)
- Granted
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 25
- 238000001914 filtration Methods 0.000 title claims abstract description 5
- 239000013307 optical fiber Substances 0.000 title claims description 11
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 66
- 230000003287 optical effect Effects 0.000 claims abstract description 44
- 239000010409 thin film Substances 0.000 claims abstract description 33
- 239000000835 fiber Substances 0.000 claims abstract description 18
- 239000012528 membrane Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 9
- 239000010408 film Substances 0.000 description 8
- 238000007747 plating Methods 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- 239000010453 quartz Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- NUHCTOLBWMJMLX-UHFFFAOYSA-N bromothymol blue Chemical compound BrC1=C(O)C(C(C)C)=CC(C2(C3=CC=CC=C3S(=O)(=O)O2)C=2C(=C(Br)C(O)=C(C(C)C)C=2)C)=C1C NUHCTOLBWMJMLX-UHFFFAOYSA-N 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- XJCPMUIIBDVFDM-UHFFFAOYSA-M nile blue A Chemical compound [Cl-].C1=CC=C2C3=NC4=CC=C(N(CC)CC)C=C4[O+]=C3C=C(N)C2=C1 XJCPMUIIBDVFDM-UHFFFAOYSA-M 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The present invention relates to the Fibre Optical Sensor of ammonia concentration in a kind of measurement gas, this sensor as sensitive materials, and adopts optical filtering formula structure with tin dioxide thin film, is provided with the optical filter that sees through 3120 ultraviolet lights.Fibre Optical Sensor stable performance of the present invention, durability and selectivity are good, are applicable to the ammonia concentration that detects in air and other gaseous environment.
Description
The present invention relates to the Fibre Optical Sensor of ammonia concentration in a kind of measurement gas.
Utilizing optical fiber sensing technology to measure ammonia concentration is just one of new developing technology of the eighties.The Fibre Optical Sensor of present existing measurement ammonia concentration (probe), generally be to make sensitive materials with the macromolecule pigmented film, for example bromthymol blue or high Nile blue etc. is mixed into pigmented film glue with polymer substance, be coated on glass, optical fiber or other transparent carrier, when ammonia touches this pigmented film, pigmented film meeting variable color, pigmented film after the variable color can change to the transmitance or the reflectivity of light, the ammonia concentration difference, change also different, so,, just can determine the ammonia concentration of being surveyed by measuring the light intensity that changes.But, can very fast photodissociation fade very poor durability when these macromolecule pigmented films are subjected to rayed.In addition, these macromolecule pigmented films are not only to the ammonia sensitivity, and to the multiple gas sensitization that has alkalescence.Thereby the selectivity of existing this Fibre Optical Sensor is very poor, is only applicable to the specific occasion of having only ammonia to exist.
The Fibre Optical Sensor that the purpose of this invention is to provide the good measurement ammonia concentration of a kind of selectivity and durability is to overcome the shortcoming that prior art exists.
Fibre Optical Sensor of the present invention is the " absorption edge of finding according to the inventor 3120 of tin dioxide thin film
Only ammonia being had the air-sensitive optical effect, and other reducibility gas not being had the air-sensitive effect " this physical characteristics designs.
The essential structure of Fibre Optical Sensor of the present invention is similar to general air-sensitive formula Fibre Optical Sensor, comprises sheath (shell), incident optical, incident lens, sensitive membrane (sensitive materials), exit lens and outgoing optical fiber.Feature of the present invention be with tin dioxide thin film as sensitive membrane, and be provided with and see through 3120
The optical filter of ultraviolet light (hereinafter to be referred as optical filter).Optical filter can be a slice, is located between tin dioxide thin film and the incident lens; Also can be two, be located at respectively between tin dioxide thin film and incident lens and the exit lens, can further improve the selectivity of sensor like this ammonia.Tin dioxide thin film can be a slice, also can be more than two or two, and the sheet number increases, and can improve sensitivity, but the sheet number is too many, and transmittance descends too big, is generally 1～4.
Used tin dioxide thin film normally adopts the pyrolytic coating method to be plated on the quartz substrate, and only plating one side also can all be plated on the two sides.The concrete grammar of plating titanium dioxide plating film is on quartz substrate: 1. earlier quartz substrate is cleaned up with acid, alkali wash water, use distilled water flushing again, dry standby then with absolute ethyl alcohol.2. put into high temperature furnace shampooing clean substrate, the high temperature furnace two ends need be opened wide, and an end sprays into by plating bath, and the other end is discharged by waste gas; Furnace temperature is risen between 450～500 ℃, start spray gun then, plating bath is sprayed to the one side that quartz substrate will plate, plating bath is met the high temperature chemically reactive at substrate surface, forms one deck tin dioxide thin film attached on the substrate; Just stop spraying plating when formed tin dioxide thin film reaches desired thickness (being good about with 20 μ), allow furnace temperature be cooled to room temperature, can take out.The prescription of plating bath is: absolute ethyl alcohol: butter of tin: formaldehyde=10: 10: the 2.5(weight ratio).
Fibre Optical Sensor of the present invention is made sensitive materials with tin dioxide thin film, adopts the optical filtering formula, makes light source with ultraviolet light or the light that contains ultraviolet light, and incident light only allows 3120 after optical filter filters
The UV-irradiation tin dioxide thin film.Because when containing ammonia in the tested gas, the ammonia molecule attaches the tin dioxide thin film surface of sensor, makes it to 3120
The transmittance of ultraviolet light increases, ammonia concentration bigger (promptly attach on the tin dioxide thin film ammonia molecule the more), and transmittance is bigger.So, see through 3120 of tin dioxide thin film by measuring
The light intensity magnitude of ultraviolet light, just can determine survey ammonia concentration in the gas.Measurement mechanism system when the present invention uses is identical with other Fibre Optical Sensor.
Fibre Optical Sensor of the present invention is made sensitive materials with tin dioxide thin film, stable performance, and durability is good, is not afraid of soda acid, gasoline and bubble.Simultaneously, owing to utilize " absorption edge principle ", selectivity is good, only to the ammonia sensitivity, and insensitive to other reducibility gas (as methyl alcohol, ethanol, acetone etc.).Fibre Optical Sensor of the present invention can be used for detecting the ammonia concentration in air and other gaseous environment.
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 to Fig. 5 is respectively the structural representation of embodiments of the invention one to five.Fig. 6 is that tin dioxide thin film is to 3120
The relation curve of ammonia concentration in the transmittance of ultraviolet light and the tested gas illustrates that transmittance is directly proportional with ammonia concentration.
Embodiment one: with reference to Fig. 1, optical filter 3 and tin dioxide thin film 4 are a slice, and optical filter is between tin dioxide thin film and incident lens 2.Incident lens 2, optical filter 3, tin dioxide thin film 4 and exit lens 5 arranged in co-axial alignment, and be fixed in the sheath 7.Incident optical 1 and outgoing optical fiber 6 pass end cap 9 central authorities respectively and enter in the sheath 7, and utilize end cap 9 to be fixed on the sheath.Two end caps 9 are sealed the sheath two ends, prevent that ambient light from entering, and make incident optical and outgoing optical fiber and other element (lens, optical filter, tin dioxide thin film) be in coaxial position.Sheath 7 is a double-wall structure, between the inside and outside wall by spacer ring 8 from a distance and be fixed up; Many apertures are all arranged on the inside and outside wall, so that tested gas enters in the sensor, the aperture on inwall and the outer wall staggers mutually, and the surface of inside and outside wall all turns black (the outer wall outside surface can not turn black), can reduce ambient light so as far as possible and enter in the sensor; The internal diameter of sheath can be 15～20mm, and length can be 50～100mm.
Embodiment two: with reference to Fig. 2, optical filter 3 is two, lays respectively between tin dioxide thin film 4 and incident lens 2 and the exit lens 5, and other structure is identical with embodiment one.
Embodiment three: with reference to Fig. 3, tin dioxide thin film 4 is two, and other is identical with embodiment two.
Embodiment four: with reference to Fig. 4, tin dioxide thin film 4 is two, and other is identical with embodiment one.
Embodiment five: with reference to Fig. 5 (arrow is represented direction of light among the figure), optical filter 3 and tin dioxide thin film 4 are two, adopt two refracting prisms 10, two tin dioxide thin films stick on respectively on the rectangle vertical plane 11 of two prisms, and two tablet filters stick on respectively on another rectangular surfaces 12 vertical with this face.The one side that two prisms is posted tin dioxide thin film in opposite directions, a segment distance spaced intermediate, so that gas enters, the one side of posting optical filter is subtend incident lens 2 and exit lens 5 respectively, after two prismatic refractions of incident optical path, makes emergent light parallel with incident light and direction is opposite, like this, incident optical 1 and outgoing optical fiber 6 just are in the same side of sensor, make the sensor one-piece construction more reasonable, use more convenient.Two refracting prisms 10 are generally quartz material and make, and tin dioxide thin film 4 can be plated in (promptly the same with other embodiment) on the quartz substrate earlier, paste on the prism also can directly be plated on the prism again.
Claims (5)
1, a kind of light filtering ammonia sensitive optical fibre sensor comprises sheath 7, incident optical 1, outgoing optical fiber 6, incident lens 2, exit lens 5 and sensitive membrane, it is characterized in that sensitive membrane is a tin dioxide thin film 4, and is provided with through 3120
The optical filter 3 of ultraviolet light.
2, a kind of Fibre Optical Sensor as claimed in claim 1 is characterized in that tin dioxide thin film 4 is 1～4.
3, a kind of Fibre Optical Sensor as claimed in claim 1 or 2 is characterized in that optical filter 3 is a slice, between tin dioxide thin film 4 and incident lens 2.
4, a kind of Fibre Optical Sensor as claimed in claim 1 or 2 is characterized in that optical filter 3 is two, lays respectively between tin dioxide thin film 4 and incident lens 2 and the exit lens 5.
5, a kind of Fibre Optical Sensor as claimed in claim 4, it is characterized in that tin dioxide thin film 4 is two, stick on respectively on the rectangle vertical plane 11 of two refracting prisms 10, the one side that tin dioxide thin film arranged on the two prisms in opposite directions, another rectangular surfaces 12 vertical with this face is pasted with optical filter 3, and difference subtend incident lens 2 and exit lens 5, incident optical 1 and outgoing optical fiber 6 are positioned at the same side of Fibre Optical Sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91104592 CN1029759C (en) | 1991-07-05 | 1991-07-05 | Light filtering ammonia sensitive optical fibre sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91104592 CN1029759C (en) | 1991-07-05 | 1991-07-05 | Light filtering ammonia sensitive optical fibre sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1057904A true CN1057904A (en) | 1992-01-15 |
| CN1029759C CN1029759C (en) | 1995-09-13 |
Family
ID=4906703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91104592 Expired - Fee Related CN1029759C (en) | 1991-07-05 | 1991-07-05 | Light filtering ammonia sensitive optical fibre sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029759C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940780A (en) * | 2014-04-21 | 2014-07-23 | 武汉纺织大学 | Optical fiber hydrogen sensor |
| CN106206828A (en) * | 2016-07-14 | 2016-12-07 | 扬州大学 | A kind of self assembly nucleocapsid SnO2the preparation method of ultraviolet detector |
| CN112255211A (en) * | 2020-10-14 | 2021-01-22 | 海南聚能科技创新研究院有限公司 | Online optical fiber ammonia nitrogen sensor |
| CN114280011A (en) * | 2021-12-28 | 2022-04-05 | 岭南师范学院 | Surface plasma resonance nitrogen dioxide gas sensing device |
-
1991
- 1991-07-05 CN CN 91104592 patent/CN1029759C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940780A (en) * | 2014-04-21 | 2014-07-23 | 武汉纺织大学 | Optical fiber hydrogen sensor |
| CN103940780B (en) * | 2014-04-21 | 2016-07-06 | 武汉纺织大学 | Optical Fider Hybrogen Sensor and preparation method thereof |
| CN106206828A (en) * | 2016-07-14 | 2016-12-07 | 扬州大学 | A kind of self assembly nucleocapsid SnO2the preparation method of ultraviolet detector |
| CN106206828B (en) * | 2016-07-14 | 2017-06-06 | 扬州大学 | A kind of self assembly nucleocapsid SnO2The preparation method of ultraviolet detector |
| CN112255211A (en) * | 2020-10-14 | 2021-01-22 | 海南聚能科技创新研究院有限公司 | Online optical fiber ammonia nitrogen sensor |
| CN114280011A (en) * | 2021-12-28 | 2022-04-05 | 岭南师范学院 | Surface plasma resonance nitrogen dioxide gas sensing device |
| CN114280011B (en) * | 2021-12-28 | 2023-11-28 | 岭南师范学院 | Surface plasma resonance nitrogen dioxide gas sensing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1029759C (en) | 1995-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2010235022B2 (en) | Optoelectronic methods and devices for detection of analytes | |
| US5766957A (en) | Spectrophotometric techniques | |
| CN100567952C (en) | The metal porphyrin langmuir blodgett film optical fiber gas sensor | |
| US20110318230A1 (en) | Chemical Sensor with an Indicator Dye | |
| CN101477045B (en) | Glass prism SPR sensor detection system based on P polarized light | |
| JPH0583141B2 (en) | ||
| CN209372679U (en) | Long light path sample cell for gas concentration detection | |
| CN208350613U (en) | A kind of multi-channel wavelength modulation type optical fiber detection system | |
| CN1029759C (en) | Light filtering ammonia sensitive optical fibre sensor | |
| JPH0467906B2 (en) | ||
| KR970033805A (en) | Gold Mirror and Silica Manufacturing Method on Silica | |
| CN109520933A (en) | A kind of cuvette | |
| CN1095543C (en) | All wavelength surface plasma excimer resonance photochemical sensor | |
| GB1530997A (en) | Optical analytical method and device | |
| CN205982082U (en) | Liquid refractometry system | |
| CN108332674A (en) | The method that single spectrum seeks porous film thickness and porosity | |
| CN110987813A (en) | Combined type optical enhancement absorption cell | |
| CN210953786U (en) | High-stability gas measurement chamber and measuring instrument thereof | |
| JPS62108855U (en) | ||
| CN2138298Y (en) | Single optic fibre concentration sensor | |
| CN2222911Y (en) | high-sensitive gasoline gas-sensitive fibre-optic sensor | |
| CN210571930U (en) | Air chamber with stable light path system and measuring instrument thereof | |
| CN221100503U (en) | Constant temperature control ultra-low ultraviolet portable smoke analyzer | |
| CN213600566U (en) | Gas measurement air chamber integrated with humidity monitoring unit | |
| CN211505211U (en) | Liquid refractive index detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |