CN101980003B - Open long-path broad-spectrum gas measurement system - Google Patents
Open long-path broad-spectrum gas measurement system Download PDFInfo
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- CN101980003B CN101980003B CN201010506002.XA CN201010506002A CN101980003B CN 101980003 B CN101980003 B CN 101980003B CN 201010506002 A CN201010506002 A CN 201010506002A CN 101980003 B CN101980003 B CN 101980003B
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- optical fiber
- telescope
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- transmitting
- measurement system
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- 238000005259 measurement Methods 0.000 title claims abstract description 20
- 239000000835 fiber Substances 0.000 claims abstract description 26
- 238000001228 spectrum Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims description 23
- 230000003595 spectral effect Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 25
- 238000000862 absorption spectrum Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 229910052724 xenon Inorganic materials 0.000 description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Classifications
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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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
-
- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
-
- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N2021/3155—Measuring in two spectral ranges, e.g. UV and visible
-
- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
- G01N2021/3513—Open path with an instrumental source
-
- 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
Abstract
The invention provides an open long-path broad-spectrum gas measurement system, which solves the problems of narrow measurement spectrum range and a few measurable gas components of the conventional open long-path broad-spectrum gas measurement system. The measurement system comprises a plurality of light sources, a multiple transceiving fiber bundle structure, a telescope and a spectrometer, wherein the light sources can be light sources capable of transmitting continuous spectrums and tunable laser, and are respectively coupled to independent transmission fiber incident ends; and the light is emitted through the public ends of the transmission fibers, is collimated through a spherical mirror in the telescope, is reflected in the original direction after the light reaches a cube-corner retroreflector on the other end of the long path of the telescope, enters the public ends of the transceiving fibers through focusing of the spherical mirror, is emitted through the independent receiving fiber exit ends, and is subjected to spectrum detection by the spectrometer. The system only requires one concave mirror inside the telescope, has a simple structure and high spectrum utilization efficiency, and can complete absorption spectrum measurement of various gases from an ultraviolet waveband to an infrared waveband.
Description
[technical field]:
The present invention relates to the monitoring system of trace gas in a kind of wide spectrum gas measurement system, the especially Measurement of Air of open long light path.
[background technology]:
In the gas-monitoring in atmospheric pollution; Can respectively different gas employing point type instruments be sampled and analyze; But this method can only be understood the atmospheric pollution situation and the long-run average in the sampling period of sample space, monitoring point; The space-time representativeness is relatively poor, and a point type monitoring instrument generally can only be monitored a kind of gas.The gas absorption spectra measuring technique of utilizing open long light path method with its on a large scale, many components detect, the online metering system of continuous real-time is just becoming environmental pollution monitoring ideal tools.Adopt open long light path technology to monitor several kinds of pollutants simultaneously at same spectral absorption wave band, can realize complete noncontact online auto monitoring, the highly sensitive monitoring result of instrument has more representativeness than the single-point monitoring.
Open long light path method monitoring system is because the restriction of measuring method and sensitivity of spectrograph; Generally be confined to adopt a kind of method and a spectrometer to measure; So the component of measurement gas is fewer; Generally can only measure the gas that has characteristic absorption spectrum in some wavelength band, as monitoring CO, CO simultaneously at infrared band
2, CH
4, in ultraviolet or advance ultraviolet band and monitor O simultaneously
3, SO
2, NO
2, but above all gas generally can not all be monitored simultaneously.
[summary of the invention]:
The objective of the invention is to solve existing open long light path measuring system or point measurement instrument and can not monitor multiple gases composition and concentration and the representative relatively poor problem of point measurement instrument space-time simultaneously, a kind of wide spectrum gas measurement system of open long light path is provided.
The wide spectrum gas measurement system of a kind of open long light path of the wide spectrum of open long light path provided by the invention; Comprise multiple light courcess, multi beam transmitting-receiving fiber bundle structure, telescope and spectrometer, this multi beam transmitting-receiving fiber bundle structure comprises at least two group launching fibers and the corresponding reception optical fiber of at least two groups, and wherein an end is fixed together becomes transmitting-receiving optical fiber common port; The other end of launching fiber is corresponding with a light source respectively; Light source can adopt light source (like xenon lamp), the tunable laser that can send continuous spectrum respectively simultaneously, and the light that light source sends is coupled to independently launching fiber incident end respectively, by the common port ejaculation of these launching fibers; Spherical reflector collimation in telescope; Through the atmosphere of one section opening, reflected along former direction behind the prism of corner cube of the arrival telescope light path other end, focus on entering transmitting-receiving optical fiber common port through spherical reflector once more; After independently receive the optical fiber exit end and penetrate, carry out spectral detection by spectrometer.
This system needs a concave mirror inner of telescope, and simple in structure, the spectrum utilization ratio is high, and the multiple gases absorption spectrum that can accomplish from the ultraviolet to the infrared band is measured.
The intrafascicular transmitting-receiving optical fiber common port of above-mentioned multi beam transmitting-receiving structured optical fiber is positioned on the telescopical optical axis, and the radius of establishing spherical reflector is R, and then receiving and dispatching the optical fiber common port is 1/2R apart from the distance of spherical reflector.
Transmitting-receiving optical fiber common port in the multi beam transmitting-receiving fibre bundle can be installed on the three-dimensional mobile platform and can carry out the three-dimensional adjustment.
Advantage of the present invention and good effect:
In the wide spectrum gas measurement system of open long light path provided by the invention, the fibre bundle with public port is adopted in spectrum transmitting-receiving, in the telescope only with a reflecting sphere mirror; Measure when the maximum characteristics of this system are to have realized from ultraviolet to infrared band gas characteristic absorption spectrum, and can realize light that multiple light courcess is sent, after gas absorption, measure simultaneously.Compare with existing typical open long optical distance spectrum absorptiometry system, reduced lens or reflector group, avoided light beam, improved the spectrum utilization ratio the blocking of transmission course midplane mirror; Compare with the point measurement instrument, have more the space-time representativeness.This system only needs multi beam transmitting-receiving fibre bundle common port is carried out the three-dimensional adjustment, thereby has simplified instrument adjustment and centering process in adjustment and centering process.
[description of drawings]:
Fig. 1 is the wide spectrum gas measurement system structural representation of a kind of open long light path provided by the invention.
[embodiment]:
Shown in Figure 1 is the wide spectrum gas measurement system of a kind of open long light path provided by the invention, and this system comprises pointolite (xenon lamp) 1, tunable laser source 2 (or light source of other type), telescope and the spectrometer (not drawing among the figure) that can send wide spectral composition.Wherein telescope comprises: spherical reflector 6, and the prism of corner cube 7 of the telescope light path other end.This system also comprises transmitting-receiving integrated fiber bundle structure in addition; (this routine launching fiber is two groups to this fiber bundle structure by launching fiber 10,11; Also can be more) and receive optical fiber 12,13 formations; Wherein an end is fixed together becomes transmitting-receiving optical fiber common port 5, and this common port is positioned on the telescope optic axis, and the radius of supposing spherical reflector 6 is R; Then multi beam transmitting-receiving optical fiber common port is 1/2R apart from the distance of spherical reflector, and this transmitting-receiving optical fiber common port can be installed on the existing three-dimensional mobile platform and also can carry out three-dimensional adjustment.
During detection; The spectrum that is sent by xenon lamp 1, tunable laser source 2 (or other light source) at first gets into the incident port 3 and 4 of launching fiber 10,11 respectively after coupling; By the other end of launching fiber, promptly receive and dispatch optical fiber common port 5 and penetrate spherical reflector 6 collimations in telescope; Atmosphere through one section opening; Arrive the prism of corner cube 7 of the telescope light path other end, reflected along former direction then, the reflected light that carries dusty gas information in the atmosphere returns along former direction; Spherical reflector in telescope 6 focuses on and gets into transmitting-receiving optical fiber common port 5 once more, carries out spectral detection after import the pairing spectrometer of each light source respectively after another port 8,9 outgoing of reception optical fiber 12,13.But spectrometer obtains the concentration of trace gas in the air according to the characteristic absorption spectrum inverting of gas.
Claims (2)
1. the wide spectrum gas measurement system of an open long light path; Comprise multiple light courcess, multi beam transmitting-receiving fiber bundle structure, telescope and spectrometer, said multiple light courcess adopts the light source or the tunable laser that can send continuous spectrum respectively simultaneously, and this multi beam transmitting-receiving fiber bundle structure comprises at least two group launching fibers and the corresponding reception optical fiber of at least two groups; Launching fiber is fixed together with an end that receives optical fiber becomes transmitting-receiving optical fiber common port; The other end of launching fiber is corresponding with a light source respectively, and the light that light source sends is coupled to independently launching fiber incident end respectively, is penetrated by transmitting-receiving optical fiber common port; Spherical reflector collimation in telescope; Through the atmosphere of one section opening, reflected along former direction behind the prism of corner cube of the arrival telescope light path other end, focus on entering transmitting-receiving optical fiber common port through spherical reflector once more; After independently receive the optical fiber exit end and penetrate, carry out spectral detection by spectrometer; Described transmitting-receiving optical fiber common port is positioned on the telescopical optical axis, and this transmitting-receiving optical fiber common port is the half the of spherical reflector radius to the distance of spherical reflector.
2. the wide spectrum gas measurement system of open long light path according to claim 1 is characterized in that adopting many spectrometers, and the gas componant that adopts the different spectrum analytical approach to accomplish simultaneously from the ultraviolet to the infrared band detects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010506002.XA CN101980003B (en) | 2010-10-14 | 2010-10-14 | Open long-path broad-spectrum gas measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010506002.XA CN101980003B (en) | 2010-10-14 | 2010-10-14 | Open long-path broad-spectrum gas measurement system |
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| Publication Number | Publication Date |
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| CN101980003A CN101980003A (en) | 2011-02-23 |
| CN101980003B true CN101980003B (en) | 2012-11-07 |
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| CN201010506002.XA Expired - Fee Related CN101980003B (en) | 2010-10-14 | 2010-10-14 | Open long-path broad-spectrum gas measurement system |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012007561B4 (en) * | 2012-04-14 | 2014-07-10 | Dräger Safety AG & Co. KGaA | Gas detection system |
| NO20150765A1 (en) * | 2015-06-11 | 2016-12-12 | Neo Monitors As | Gas monitor |
| CN105629464A (en) * | 2016-02-18 | 2016-06-01 | 中国科学院国家空间科学中心 | Diffraction-limiting imaging pseudo star source simulation system based on single reflector |
| CN108132142B (en) * | 2018-01-31 | 2024-04-05 | 中国科学院西安光学精密机械研究所 | Device and method for detecting large-caliber reflection optical system |
| CN114112963A (en) * | 2021-11-30 | 2022-03-01 | 青岛崂应海纳光电环保集团有限公司 | Gas telemetering telescope |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2274163B (en) * | 1993-01-12 | 1996-11-20 | Pollution Monitor Syst Ltd | Gas analyser |
| JP2002228582A (en) * | 2001-01-30 | 2002-08-14 | Anritsu Corp | Gas detection device |
| CN1908623B (en) * | 2005-08-02 | 2010-05-05 | 德菲电气（北京）有限公司 | Multi-component infrared online gas analyzer |
| DE102005055860B3 (en) * | 2005-11-23 | 2007-05-10 | Tyco Electronics Raychem Gmbh | Gas sensor arrangement with light channel in the form of a conical section rotational body |
| CN101021474B (en) * | 2006-12-05 | 2010-09-01 | 中国科学院安徽光学精密机械研究所 | Opening gas multi-element monitoring instrument and monitoring method |
| CN101435773B (en) * | 2008-12-02 | 2010-12-01 | 天津大学 | Gas monitoring method and apparatus based on quasi continuous diode laser modulated spectrum |
-
2010
- 2010-10-14 CN CN201010506002.XA patent/CN101980003B/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| Hikmat H. Asadov ET AL.Synthesis of corrected multi-wavelength spectrometers for atmospheric trace gases.《CHINESE OPTICS LETTERS》.2009,第7卷(第5期),361-363. * |
| JP特开2002-228582A 2002.08.14 |
| 张学典等.基于DOAS方法烟道污染气体在线监测系统的设计.《传感技术学报》.2009,第20 卷(第9 期),1963-1966. * |
| 王帅等.多组分气体检测与识别技术进展.《重庆工学院学报(自然科学版)》.2007,第21 卷(第3 期),78-81,87. * |
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| CN101980003A (en) | 2011-02-23 |
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