CN1896720A - Gas and liquid concentration testing sensor and testing system - Google Patents
Gas and liquid concentration testing sensor and testing system Download PDFInfo
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- CN1896720A CN1896720A CN 200510061238 CN200510061238A CN1896720A CN 1896720 A CN1896720 A CN 1896720A CN 200510061238 CN200510061238 CN 200510061238 CN 200510061238 A CN200510061238 A CN 200510061238A CN 1896720 A CN1896720 A CN 1896720A
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- gas concentration
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- 239000007788 liquid Substances 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 title claims description 14
- 239000002184 metal Substances 0.000 claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- 230000005622 photoelectricity Effects 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 36
- 238000010521 absorption reaction Methods 0.000 description 10
- 230000035945 sensitivity Effects 0.000 description 8
- 239000013307 optical fiber Substances 0.000 description 6
- 238000005102 attenuated total reflection Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 239000012792 core layer Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The invention relates to a detection sensor and the detection system for the gas and the liquid concentration. The detection system is made up of the small-angle low-index prism deposited with the upper metal film in the bottom which is closed to the up of the gas-liquid room and the lower metal mass connected with the air intake and the escape pipe which is closed to the below of the air-liquid room. The laser located in the frame of the detection sensor is connected with the optical hole in series. The optical axis directs to the center of the metal film in the upper of the gas concentration detection sensor, the photoelectricity sensor is symmetrical with the laser using the metal film as the center, the photoelectricity sensor is connected to the computer by the lead; the electronic detector receives the light intensity value reflected by the detector and lased by the laser. The invention is proper to detect the intensity of all kinds of the gas and the liquid.
Description
Technical field the present invention relates to a kind of pick-up unit, and particularly a kind of gas and liquid concentration testing sensor reach by its detection system of forming, and are applicable to rigorous analysis and field of measuring technique.
Background technology obtained using quite widely based on the sensor of surface plasma resonance (SPR), optical waveguide and optical fiber technology since the 1980s.Easy to use, simple in structure, the dependable performance of this class sensor, and can survey a plurality of parameters of testing sample.Their common feature is the evanescent field region that testing sample is in resonant mode (surface plasma-wave and optical guided wave).Also be referred to as the evanescent field sensor.Be applicable to of the measurement of fields such as physics, chemistry, biology, medical science to a plurality of parameters.At present, the research of this class sensor is had the gesture that is doubled and redoubled, existing a lot of all class sensors have been realized commercialization.And the sensitivity of this evanescent field sensor is mainly determined by the product of following two factors: the width of (1) resonant mode attenuated total reflection (ATR) absorption peak, and the absorption peak width is narrow more, and then sensitivity is high more.(2) resonant mode is big more in the luminous energy density of detecting area, and then sensitivity is high more.For sensor based on leakage optical waveguide and optical fiber technology, the width of resonant mode ATR absorption peak may be very narrow, but its sample is usually as the overlayer of optical waveguide or optical fiber, and the luminous energy in the overlayer only accounts for the minimum part of resonant mode luminous energy, and detection efficiency is very low.Therefore, can not do very highly usually based on the sensitivity of the evanescent field sensor of revealing optical waveguide and optical fiber technology.And,, have higher detection efficiency though there is luminous energy to be in the detecting area scope greater than half for SPR type sensor, because the absorption of metal film causes the width of its ATR absorption peak very big, be difficult to reach very high detection sensitivity equally.Use requires the characteristic wavelength of testing sample must be in the low loss window of Optical Fiber Transmission based on the Fibre Optical Sensor of optical fiber technology, and therefore the sample type that makes sensor to survey is confined in the long scope of a certain standing wave.This all is the fatal shortcoming that the evanescent field sensor is difficult to widespread use.
Summary of the invention the purpose of this invention is to provide a kind of novel optical waveguide oscillating field gas of double-sided metal coating optical waveguide structure and liquid concentration testing sensor of adopting and reaches by its detection system of forming, and is suitable for detecting the concentration of harmless or harmful all gases and liquid.
The present invention is achieved by the following technical solutions; Low-angle low index prisms that tightly be bonded on the gas liquid chamber by sealing, bottom deposit has the upper strata metallic film and sealing tightly are bonded under the gas liquid chamber and with draft tube and escape pipe and seal the novel optical waveguide oscillating field gas concentration detecting sensor that the lower metal piece that links constitutes double-sided metal coating optical waveguide structure, and the latter is positioned on the platen.
Adopt the detection system of double-sided metal coating optical waveguide type gas concentration detecting sensor, comprise sensor and light source and photoelectric receiving arrangement; The laser instrument that is positioned on the Plate support of gas concentration detecting sensor upper left side is connected coaxial with the optics aperture, optical axis points to the center of gas concentration detecting sensor upper strata metallic film, and the light that the center of assurance gas concentration detecting sensor upper strata metallic film and laser instrument send is in same level height; Also by the central shaft symmetry at its center, their position all is adjustable with the vertical metal film for photodetector and laser instrument.Photodetector is connected with computing machine by lead, and photodetector receives by laser instrument through the emission of optics aperture, through the light intensity value of double-sided metal coating optical waveguide type gas concentration detecting sensor reflection; When gas concentration value to be measured changes in the gas compartment, photodetector detects the light intensity value that the gas concentration detecting sensor reflects and changes, by computing machine the size of light intensity value is gathered, changes, analyzed and stores, just can measure and show the numerical value and the situation of change thereof of gas concentration.
Useful technique effect of the present invention is: 1. clad is a metal, can not be restricted as the sample refractive index of waveguide core sublayer, and both can be liquid, also can be gas; 2. core layer thickness can reach the submillimeter magnitude, has not only enlarged the parking space of sample, and for the superelevation rank guided mode of exciting light waveguide provides may; 3. though clad adopts metallic film, can cause absorption, theory points out, absorbing thickness along with core layer increases and reduce, and in this structure, the width of ATR absorption peak reduces 1-2 magnitude than spr sensor; 4. the propagation constant of superelevation rank guided mode is very responsive to the variation of the refractive index (sample concentration and absorption) of sample; 5. sample is in the great oscillating field of luminous energy density, and detection efficiency is high; 6. the existing evanescent field sensor of the remolding sensitivity of optical guided wave resonant mode is high one more than the order of magnitude; 7. can utilize high order guided modes, and high order guided modes is a polarization irrelevant, therefore need pass through polarization manipulation, greatly made things convenient for the use of this sensor light source.The present invention with new method realize to the detection of gas and liquid and analysis, simple in structure, cost is low, be easy to processing and make up and do not need the single polarization source, low to gas and liquid refractive index area requirement, the detection sensitivity height, practical, vast market prospect is arranged.
The present invention is further described below in conjunction with drawings and Examples for description of drawings.
Fig. 1 is the structural representation of gas and liquid concentration testing sensor.
Fig. 2 is the left view of Fig. 1
Fig. 3 is the vertical view of Fig. 1
Fig. 4 is a detection system synoptic diagram of the present invention
Embodiment
Claims (5)
1, a kind of gas and liquid concentration testing sensor, comprise prism, resonating membrane and gas compartment, it is characterized in that: tightly be bonded at the low-angle low index prisms (1) on the gas liquid chamber (3) and sealed lower metal piece (4) the formation double-sided metal coating optical waveguide type gas concentration detecting sensor (10) that tightly is bonded under the gas liquid chamber (3) by sealing, the latter is positioned on the platen (11).
2. gas according to claim 1 and liquid concentration testing sensor is characterized in that: the bottom deposit in low-angle low index prisms (1) has upper strata metallic film (2), and lower metal piece (4) links with draft tube (5) and escape pipe (6) sealing.
3, a kind of detection system that adopts described gas of claim 1 and liquid concentration testing sensor, comprise that sensor, light source and photoelectric receiving arrangement is characterized in that: be positioned at laser instrument (7) on gas concentration detecting sensor (10) the upper left side Plate support (8) and connect coaxially with optics aperture (9), optical axis points to the center (O) of metallic film (2); Also by the central shaft symmetry at its center (O), their position all is adjustable with vertical metal film (2) for photodetector (14) and laser instrument (7).
4. detection system according to claim 3 is characterized in that: photodetector (14) is connected with computing machine (12) by lead (13).
5, detection system according to claim 3, it is characterized in that: photodetector (14) receives by the light intensity value of laser instrument (7) through optics aperture (9) emission and double-sided metal coating optical waveguide type gas concentration detecting sensor (10) reflection, when gas concentration value to be measured changes in the gas compartment, photodetector (14) detects the light intensity value that double-sided metal coating optical waveguide type gas concentration detecting sensor (10) reflects and changes, by computing machine (12) size of light intensity value is gathered, conversion, analyze and storage, just can measure and show the numerical value and the situation of change thereof of gas concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100612386A CN100412528C (en) | 2005-10-20 | 2005-10-20 | Gas and liquid concentration testing sensor and testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100612386A CN100412528C (en) | 2005-10-20 | 2005-10-20 | Gas and liquid concentration testing sensor and testing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1896720A true CN1896720A (en) | 2007-01-17 |
| CN100412528C CN100412528C (en) | 2008-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100612386A Expired - Fee Related CN100412528C (en) | 2005-10-20 | 2005-10-20 | Gas and liquid concentration testing sensor and testing system |
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| Country | Link |
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| CN (1) | CN100412528C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101739795B (en) * | 2008-11-21 | 2012-09-26 | 财团法人工业技术研究院 | Gas sensing module and wireless transmitting device and wireless sensing system using same |
| CN105021570A (en) * | 2015-07-15 | 2015-11-04 | 中山市三易测量仪器有限公司 | Liquid concentration detection device |
| CN107167452A (en) * | 2017-06-08 | 2017-09-15 | 复拓科学仪器（苏州）有限公司 | The stink damp body detecting method and detection means of waveguide are coated based on double-sided metal |
| CN112326161A (en) * | 2020-11-03 | 2021-02-05 | 谭秀兰 | LED lamp gas tightness detection device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09250981A (en) * | 1996-03-15 | 1997-09-22 | Toto Ltd | Surface plasmon resonance sensor |
| JPH10221249A (en) * | 1996-12-05 | 1998-08-21 | Norio Miura | Drug measuring device, sensor, and detecting element used for sensor |
| JPH11271219A (en) * | 1998-03-25 | 1999-10-05 | Natl Rehabilitation Center For The Disabled | Surface plasmon resonance system immunoassay device |
| AU5134100A (en) * | 1999-05-17 | 2000-12-05 | Florida International University | Surface plasmon resonance detection with high angular resolution and fast response time |
-
2005
- 2005-10-20 CN CNB2005100612386A patent/CN100412528C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101739795B (en) * | 2008-11-21 | 2012-09-26 | 财团法人工业技术研究院 | Gas sensing module and wireless transmitting device and wireless sensing system using same |
| CN105021570A (en) * | 2015-07-15 | 2015-11-04 | 中山市三易测量仪器有限公司 | Liquid concentration detection device |
| CN105021570B (en) * | 2015-07-15 | 2017-12-19 | 中山市三易测量仪器有限公司 | A kind of liquid concentration detection device |
| CN107167452A (en) * | 2017-06-08 | 2017-09-15 | 复拓科学仪器（苏州）有限公司 | The stink damp body detecting method and detection means of waveguide are coated based on double-sided metal |
| CN112326161A (en) * | 2020-11-03 | 2021-02-05 | 谭秀兰 | LED lamp gas tightness detection device |
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| Publication number | Publication date |
|---|---|
| CN100412528C (en) | 2008-08-20 |
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Owner name: JIANGXI SCIENCE AND TECHNOLOGY NORMAL COLLEGE Free format text: FORMER OWNER: WANG SHENGQIAN Effective date: 20090710 |
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Effective date of registration: 20090710 Address after: Fenglin Road Changbei Economic Development Zone of Nanchang city in Jiangxi Province Patentee after: Jiangxi Technology Normal College Address before: Fenglin Road Jiangxi Science & Technology Normal University Changbei Economic Development Zone in Nanchang City, Jiangxi Province Patentee before: Wang Shengqian |
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Granted publication date: 20080820 Termination date: 20091120 |