CN104122214A - Cavity enhanced absorption spectrometer for simultaneous detection of aerosol extinction and scattering coefficients - Google Patents
Cavity enhanced absorption spectrometer for simultaneous detection of aerosol extinction and scattering coefficients Download PDFInfo
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Abstract
The invention relates to a cavity enhanced absorption spectrometer for simultaneous detection of aerosol extinction and scattering coefficients; the cavity enhanced absorption spectrometer comprises an optical path system and a gas path system; the optical path system comprises a light emitting diode and an optical resonant cavity receiving light outputted by the light emitting diode, the light emitting end of the optical resonant cavity is provided with an extinction spectrometer for detection of extinction coefficients, and a scattered light integral detector is inserted into the middle part of the optical resonant cavity from a side face. The transmission light with different wavelengths, which is emitted from the light emitting diode and enters into the optical resonant cavity, is analyzed by the extinction spectrometer, scattering coefficients at a plurality of wavelengths are detected by use of the scattered light integral detector, on the basis of measurement of the extinction coefficients and scattering coefficients, aerosol absorption coefficient, single scattering albedo and the like can be further obtained, and the cavity enhanced absorption spectrometer can meet the needs of the research work of optical properties of atmospheric aerosol to a greater extent. The cavity enhanced absorption spectrometer can be applied to the online analysis and detection of the optical properties of the atmospheric aerosol.
Description
Technical field
The present invention relates to the online detection field of gasoloid, particularly relate to a kind of cavity reinforced absorption spectrum instrument that simultaneously detects aerosol extinction and scattering coefficient.
Background technology
Atmospheric aerosol is that the whole world and regional climate change the important driving factor, but gasoloid is also one of uncertainty source maximum in current climatic study simultaneously, diversity, the spatial and temporal distributions in its reason atmospheric aerosol source on Global Scale differs greatly, the very big uncertainty that the restriction of measuring technique is measured gasoloid absorption characteristic is also a major reason.Research can be measured extinction coefficient and scattering coefficient simultaneously or be measured the new technology of scattering coefficient and absorption coefficient simultaneously, and atmospheric science research and meteorological field are had to important practical value and meaning.
The multiple reflections characteristic of cavity ring down spectroscopy technology based on high reflective mirror, in shorter distance, realize long equivalent light path, there is hypersensitivity and low detectability, the cavity reinforced absorption spectrum growing up on this basis, adopt continuous transmitting illuminant, the light of different order of reflection is cumulative, greatly improve the light intensity in optical cavity, these advantages of optical cavity ring-down spectrum are not only inherited, simultaneously, simplify the requirement to light source and analytical calculation, be very suitable for the OPTICAL PROPERTIES of atmospheric aerosol and the detection analysis of various trace gas.
At present, there is in the world the research for Aerosol Extinction detection by cavity reinforced absorption spectrum.But the measurement of Aerosol scattering coefficient still relies on the auxiliary of other instruments (as integration turbidimeter), and in the inconsistent situation of both optical source wavelengths, need further to calculate unified under identical wavelength.Accuracy in computation is subject to the impact of aerosol model, may produce the error of can not ignore.Therefore, exploitation can be measured the method for Aerosol Extinction and scattering coefficient on same instrument simultaneously, obtain gasoloid absorption coefficient and single scattering albedo simultaneously, to improving accuracy and the reliability that coefficient absorbs and single scattering albedo is measured, be extremely important.
Summary of the invention
In order to overcome above-mentioned technical matters, the object of the present invention is to provide a kind of incoherent wideband cavity reinforced absorption spectrum instrument that can simultaneously detect aerosol extinction and scattering coefficient.
The technical solution adopted in the present invention is:
A kind of cavity reinforced absorption spectrum instrument that simultaneously detects aerosol extinction and scattering coefficient; comprise light path system and air-channel system; described light path system comprises light emitting diode and receives the optical resonator of light emitting diode output light; the light exit side of described optical resonator is provided with the extinction spectra instrument that detects extinction coefficient; described optical resonator middle part is inserted with scattered light integral detector from the side, and described air-channel system comprises the air feed gas circuit, exhaust gas circuit and the protection gas circuit that connect optical resonator.
As the further improvement of technique scheme, described scattered light integral detector is perpendicular to the optical path direction of optical resonator and be positioned at the side at light path middle part.
As the further improvement of technique scheme, described scattered light integral detector is one or more photodetectors with different wave length wave filter, receive the scattered light of certain range of scatter angles, obtained the scattering coefficient of testing sample by the scattered light light intensity detecting.
As the further improvement of technique scheme, described air feed gas circuit is connected in optical resonator near light incident side position, and described exhaust gas circuit is connected in optical resonator near light exit side position, forms one-sided air feed, one-sided exhaust.
As the further improvement of technique scheme, described air feed gas circuit comprises the sample channel and the background passage that are connected in parallel, described sample channel is used for being connected gas to be measured with the inlet end of background passage, the endpiece of described sample channel and background passage is connected to three-way switch valve, described three-way switch valve connects optical resonator, and described background path is provided with filtrator.
As the further improvement of technique scheme, described protection gas circuit is provided with two and connects the entrances of optical resonators, and two entrances lay respectively between the outlet of air feed gas circuit and light incident side, between exhaust gas circuit entrance and light exit side.
As the further improvement of technique scheme, described exhaust gas circuit comprises the aspiration pump, flow-limiting valve and the flowmeter that are connected in series by pipeline.
As the further improvement of technique scheme, described light path system comprises the gatherer between light emitting diode and optical resonator, and described gatherer comprises lens combination and the optical fiber that light passes through successively.
The invention has the beneficial effects as follows: the present invention combines cavity reinforced absorption spectrum technology and limit scattering integral turbidity detection technique, use the analysis of extinction spectra instrument to penetrate and go forward side by side into the transmitted light of optical resonator different wave length from light emitting diode, can obtain the Aerosol Extinction that wavelength is resolved, measure the scattering coefficient under multiple wavelength with scattered light integral detector, the wavelength coverage that extinction coefficient is contained has comprised the wavelength that scattering coefficient is corresponding, therefore without the conversion of carrying out wavelength; Measuring on the basis of extinction coefficient and scattering coefficient, can further obtain the optical parametrics such as aerocolloidal absorption coefficient and single scattering albedo, and, the extinction coefficient that wavelength is resolved can calculate aerocolloidal dust, and this bends bright index, can be used for analyzing aerocolloidal distribution pattern, meet to a greater degree atmospheric aerosol OPTICAL PROPERTIES requirements of one's work.
Brief description of the drawings
Below in conjunction with drawings and embodiments, the present invention is further described.
Fig. 1 is schematic diagram of structure of the present invention.
Embodiment
As shown in Figure 1 time, detect the cavity reinforced absorption spectrum instrument of aerosol extinction and scattering coefficient; comprise light path system and air-channel system; light path system comprises light emitting diode 1 and receives light emitting diode 1 optical resonator 2 of exporting light; the light exit side of optical resonator 2 is provided with the extinction spectra instrument 3 that detects extinction coefficient; optical resonator 2 middle parts are inserted with scattered light integral detector 4 from the side, and air-channel system comprises the air feed gas circuit 5, exhaust gas circuit 6 and the protection gas circuit 7 that connect optical resonator 2.
Light emitting diode 1 can send incoherent broadband light, and it is luminous continuously, and optical wavelength range is continuous.The output power of light emitting diode 1 is 100mW in the present embodiment, optical wavelength range 500nm to 560nm, export as light source with respect to adopting laser, the scope that light emitting diode 1 is wider because wavelength has, just can obtain the information of the optical property under different wave length condition, and these information are more more comprehensively many, are conducive to follow-up analysis.
In the present embodiment, light path system also comprises the gatherer between light emitting diode 1 and optical resonator 2, gatherer comprises lens combination 8 and the optical fiber 9 that light passes through successively, the optically-coupled that scioptics group 8 and convex lens send light emitting diode 1 enters optical fiber 9, direct-coupling enters optical resonator 2 again, and the output of optical fiber 9 is regulated by three-dimensional regulating mechanism.
Preferably, optical resonator 2 comprises two plano-concave high reflective mirrors perpendicular to light incident direction, wherein, high reflective mirror concave surface is high reverse side, radius-of-curvature 1m, in 500nm to 560nm scope internal reflection rate higher than 99.99%, when installation, the parallel and center line of the relative minute surface of concave surface overlaps, and wherein inputs high reflective mirror and is positioned at light incident one end, and it is light exit side that output high reflective mirror is positioned at the relative other end, distance between two high reflective mirror eyeglasses is 0.74m, can form the stable optical resonator cavity 2 of high-quality.
In the present embodiment, scattered light integral detector 4 is photomultiplier, receiving area 320mm
2, carrying out filtering with the band pass filter of 550nm, this photomultiplier is positioned at optical resonator 2 middle parts, vertical with cavity, can receive 5 ° of scattered lights to 175 ° of scopes of scattering angle simultaneously.According to the principle of limit diffuse transmission type integration turbidimeter, can calculate the scattering coefficient of aerosol sample under corresponding wavelength by the scattered light light intensity detecting.
Extinction spectra instrument 3 is positioned at the rear side of the output high reflective mirror of optical resonator 2, receive the transmitted light of optical resonator 2, and light signal is converted into electric signal to carry out the observation of change in optical signal, 500nm to 560nm is carried out to spectral analysis at interior wave band, according to cavity reinforced absorption spectrum principle, can obtain the extinction coefficient of the wavelength parsing of aerosol sample in chamber.
In the present embodiment, air feed gas circuit 5 is carried out optical analysis for aerosol sample being introduced to optical resonator 2, and exhaust gas circuit 6 is discharged outside spectrometer by the aerosol sample of optical resonator 2 and the power of air inlet is provided.Air feed gas circuit 5 is connected in optical resonator 2 near light incident side position, and exhaust gas circuit 6 is connected in optical resonator 2 near light exit side position, forms one-sided air feed, one-sided exhaust.Than the mode of the two ends exhaust of middle air feed or two ends air inlet intermediate exhaust, which has reduced connecting tube and the corresponding channel bend of whole spectrometer, makes aerocolloidal circulation comparatively smooth and easy, has reduced loss.
Preferably, air feed gas circuit 5 comprises the sample channel and the background passage that are connected in parallel, sample channel is used for being connected gas to be measured with the inlet end of background passage, the endpiece of sample channel and background passage is connected to three-way switch valve 51, three-way switch valve 51 connects optical resonator 2, and background path is provided with filtrator 52.Filtrator 52 can filter the particle in sample gas, obtains background gas as a reference, and three-way switch valve 51 can make the analytical gas that enters optical resonator 2 switch between filtration background gas and sample gas.
In the present embodiment, exhaust gas circuit 6 comprises the aspiration pump 61, flow-limiting valve 62 and the flowmeter 63 that are connected in series by pipeline.Aspiration pump 61 provides driving force to whole gas circuit, and flow-limiting valve 62 is for regulation and control gas flow rate, and flowmeter 63 is for gas-monitoring flow velocity, flow velocity that can control and measurement sample gas by exhaust gas circuit 6.
Protection gas circuit 7 is provided with two and connects the entrances of optical resonators 2, and two entrances lay respectively at that air feed gas circuit 5 exports between light incident side, between exhaust gas circuit 6 entrances and light exit side.Protection gas circuit 7, for the clean gas such as high pure nitrogen, high-purity dry air being introduced to the inner side of optical resonator 2 high reflective mirrors, forms protection zone, prevents that the aerosol particle thing in sample gas from polluting eyeglass.
The principle of work of the present embodiment is: the light that light emitting diode 1 is launched continuous different wave length is coupled into optical resonator 2 through gatherer, in the resonator cavity of this high-quality, form and carry out back reflective, form vibration, and stack enhancing, make effective light path improve tens thousand of even hundreds thousand of times.Light in chamber produces and absorbs and scattering under aerocolloidal effect, and both summations are delustring.Aerocolloidal extinction coefficient difference, the light intensity in chamber can change, and can measure aerocolloidal delustring in chamber by transmitted light.Here, use extinction spectra instrument 3 to analyze the transmitted light of different wave length, can obtain the Aerosol Extinction that wavelength is resolved.Meanwhile, aerocolloidal scattered light in cavity, the scattered light integral detector 4 that can be positioned at cavity side receives, and because scattered light light intensity is directly proportional to scattering coefficient, therefore can obtain Aerosol scattering coefficient by measuring scattered light.Air inlet gas circuit can constantly be incorporated into the aerosol sample in atmosphere in optical resonator 2, then discharges by exhaust gas circuit 6, and the real-time online that can realize extinction coefficient to atmospheric aerosol and scattering coefficient detects.
The equivalent optical path length of the method effect, has the feature highly sensitive, detectability is low.
The present embodiment can obtain aerocolloidal extinction coefficient and scattering coefficient simultaneously, further can calculate the key parameter of the optical properties of aerosol such as aerocolloidal absorption coefficient and single scattering albedo, in addition, the Aerosol Extinction that wavelength is resolved, can matching obtain this bright index in the wrong of aerocolloidal dust, for analyzing the pattern of gasoloid particle diameter composition.When this instrument has not only been realized Aerosol Extinction and scattering coefficient, detect, also can realize the Synchronization Analysis of the many Optical property parameters of gasoloid, greatly improve the use value of instrument, the range of application of expansion instrument.
The above is the preferred embodiment of the present invention, and it does not form limiting the scope of the invention.
Claims (8)
1. one kind is detected the cavity reinforced absorption spectrum instrument of aerosol extinction and scattering coefficient simultaneously; comprise light path system and air-channel system; it is characterized in that: described light path system comprises light emitting diode and receives the optical resonator of light emitting diode output light; the light exit side of described optical resonator is provided with the extinction spectra instrument that detects extinction coefficient; described optical resonator middle part is inserted with scattered light integral detector from the side, and described air-channel system comprises the air feed gas circuit, exhaust gas circuit and the protection gas circuit that connect optical resonator.
2. the cavity reinforced absorption spectrum instrument that simultaneously detects aerosol extinction and scattering coefficient according to claim 1, is characterized in that: described scattered light integral detector is perpendicular to the optical path direction of optical resonator and be positioned at the side at light path middle part.
3. the cavity reinforced absorption spectrum instrument that simultaneously detects aerosol extinction and scattering coefficient according to claim 2, it is characterized in that: described scattered light integral detector is one or more photodetectors with different wave length wave filter, receive the scattered light of certain range of scatter angles, obtained the scattering coefficient of testing sample by the scattered light light intensity detecting.
4. the cavity reinforced absorption spectrum instrument that simultaneously detects aerosol extinction and scattering coefficient according to claim 1, it is characterized in that: described air feed gas circuit is connected in optical resonator near light incident side position, described exhaust gas circuit is connected in optical resonator near light exit side position, forms one-sided air feed, one-sided exhaust.
5. the cavity reinforced absorption spectrum instrument that simultaneously detects aerosol extinction and scattering coefficient according to claim 4, it is characterized in that: described air feed gas circuit comprises the sample channel and the background passage that are connected in parallel, described sample channel is used for being connected gas to be measured with the inlet end of background passage, the endpiece of described sample channel and background passage is connected to three-way switch valve, described three-way switch valve connects optical resonator, and described background path is provided with filtrator.
6. the cavity reinforced absorption spectrum instrument that simultaneously detects aerosol extinction and scattering coefficient according to claim 4; it is characterized in that: described protection gas circuit is provided with two and connects the entrances of optical resonators, two entrances lay respectively between the outlet of air feed gas circuit and light incident side, between exhaust gas circuit entrance and light exit side.
7. the cavity reinforced absorption spectrum instrument that detects aerosol extinction and scattering coefficient according to time described in claim 4 or 5 or 6, is characterized in that: described exhaust gas circuit comprises the aspiration pump, flow-limiting valve and the flowmeter that are connected in series by pipeline.
8. the cavity reinforced absorption spectrum instrument that simultaneously detects aerosol extinction and scattering coefficient according to claim 1, it is characterized in that: described light path system comprises the gatherer between light emitting diode and optical resonator, described gatherer comprises lens combination and the optical fiber that light passes through successively.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596955A (en) * | 2014-12-11 | 2015-05-06 | 中国科学院合肥物质科学研究院 | Cavity enhanced absorption spectrum device and method for simultaneous measurement of trace gas concentration and aerosol extinction |
| CN105651710A (en) * | 2015-12-30 | 2016-06-08 | 淮北师范大学 | Optical remote sensing method for acquiring absolute light intensity of aerosol |
| CN105988124A (en) * | 2016-03-04 | 2016-10-05 | 中国科学院合肥物质科学研究院 | Aerosol pollutant distribution detection method based on absorption extinction ratio calibration profile line |
| CN106124407A (en) * | 2016-06-03 | 2016-11-16 | 中国科学院合肥物质科学研究院 | A kind of optical cavity, the aerosol extinction instrument with this optical cavity and the measuring method of Aerosol Extinction |
| CN106124410A (en) * | 2016-06-08 | 2016-11-16 | 中国科学院合肥物质科学研究院 | Single photoacoustic cell measures the new method of aerosol multi-wavelength absorptance simultaneously |
| CN106644942A (en) * | 2017-02-22 | 2017-05-10 | 中国科学院合肥物质科学研究院 | Photoacoustic absorption cell and online measuring device for multiple optical parameters of atmospheric particulate matters |
| CN106908858A (en) * | 2017-05-09 | 2017-06-30 | 中国科学院合肥物质科学研究院 | A kind of UAV system type atmospheric aerosol single scattering albedo profile measuring system |
| CN108956481A (en) * | 2017-05-19 | 2018-12-07 | 杭州春来科技有限公司 | Alternately Aerosol Extinction and NO in measurement atmosphere2The device and method of concentration |
| CN109001132A (en) * | 2018-09-04 | 2018-12-14 | 深圳市卡普瑞环境科技有限公司 | A kind of atmospheric molecule detection method |
| CN109001131A (en) * | 2018-09-04 | 2018-12-14 | 深圳市卡普瑞环境科技有限公司 | A kind of hydrone absorption spectrum acquisition methods |
| CN109211807A (en) * | 2018-09-04 | 2019-01-15 | 深圳市卡普瑞环境科技有限公司 | A kind of atmospheric molecule detection system having pre-reformer before gas is examined |
| CN111208043A (en) * | 2020-01-16 | 2020-05-29 | 中国科学院合肥物质科学研究院 | System and method for synchronously measuring moisture absorption growth factors of multiple optical parameters of aerosol |
| CN115482643A (en) * | 2022-08-24 | 2022-12-16 | 清华大学 | Fire smoke detector and detection method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080074660A1 (en) * | 2006-02-17 | 2008-03-27 | Jun Ye | Frequency comb cavity enhanced spectroscopy |
| CN103308482A (en) * | 2012-03-15 | 2013-09-18 | 中国科学院安徽光学精密机械研究所 | Aerosol scattering and extinction measurement device |
| CN203365314U (en) * | 2013-04-22 | 2013-12-25 | 浙江师范大学 | Lung cancer detection device based on incoherent cavity enhanced spectroscopy |
| CN103712914A (en) * | 2013-12-25 | 2014-04-09 | 广州禾信分析仪器有限公司 | Laser cavity ring-down spectrometer for simultaneous detection of aerosol extinction and scattering coefficients |
| CN204008442U (en) * | 2014-07-09 | 2014-12-10 | 广州禾信分析仪器有限公司 | Detect the cavity reinforced absorption spectrum instrument of aerosol extinction and scattering coefficient simultaneously |
-
2014
- 2014-07-09 CN CN201410326683.XA patent/CN104122214A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080074660A1 (en) * | 2006-02-17 | 2008-03-27 | Jun Ye | Frequency comb cavity enhanced spectroscopy |
| CN103308482A (en) * | 2012-03-15 | 2013-09-18 | 中国科学院安徽光学精密机械研究所 | Aerosol scattering and extinction measurement device |
| CN203365314U (en) * | 2013-04-22 | 2013-12-25 | 浙江师范大学 | Lung cancer detection device based on incoherent cavity enhanced spectroscopy |
| CN103712914A (en) * | 2013-12-25 | 2014-04-09 | 广州禾信分析仪器有限公司 | Laser cavity ring-down spectrometer for simultaneous detection of aerosol extinction and scattering coefficients |
| CN204008442U (en) * | 2014-07-09 | 2014-12-10 | 广州禾信分析仪器有限公司 | Detect the cavity reinforced absorption spectrum instrument of aerosol extinction and scattering coefficient simultaneously |
Non-Patent Citations (1)
| Title |
|---|
| 董美丽等: "宽带腔增强吸收光谱技术应用于痕量气体探测及气溶胶消光系数测量", 《物理学报》 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596955A (en) * | 2014-12-11 | 2015-05-06 | 中国科学院合肥物质科学研究院 | Cavity enhanced absorption spectrum device and method for simultaneous measurement of trace gas concentration and aerosol extinction |
| CN105651710A (en) * | 2015-12-30 | 2016-06-08 | 淮北师范大学 | Optical remote sensing method for acquiring absolute light intensity of aerosol |
| CN105988124A (en) * | 2016-03-04 | 2016-10-05 | 中国科学院合肥物质科学研究院 | Aerosol pollutant distribution detection method based on absorption extinction ratio calibration profile line |
| CN106124407A (en) * | 2016-06-03 | 2016-11-16 | 中国科学院合肥物质科学研究院 | A kind of optical cavity, the aerosol extinction instrument with this optical cavity and the measuring method of Aerosol Extinction |
| CN106124410A (en) * | 2016-06-08 | 2016-11-16 | 中国科学院合肥物质科学研究院 | Single photoacoustic cell measures the new method of aerosol multi-wavelength absorptance simultaneously |
| CN106644942A (en) * | 2017-02-22 | 2017-05-10 | 中国科学院合肥物质科学研究院 | Photoacoustic absorption cell and online measuring device for multiple optical parameters of atmospheric particulate matters |
| CN106908858A (en) * | 2017-05-09 | 2017-06-30 | 中国科学院合肥物质科学研究院 | A kind of UAV system type atmospheric aerosol single scattering albedo profile measuring system |
| CN108956481A (en) * | 2017-05-19 | 2018-12-07 | 杭州春来科技有限公司 | Alternately Aerosol Extinction and NO in measurement atmosphere2The device and method of concentration |
| CN109001132A (en) * | 2018-09-04 | 2018-12-14 | 深圳市卡普瑞环境科技有限公司 | A kind of atmospheric molecule detection method |
| CN109001131A (en) * | 2018-09-04 | 2018-12-14 | 深圳市卡普瑞环境科技有限公司 | A kind of hydrone absorption spectrum acquisition methods |
| CN109211807A (en) * | 2018-09-04 | 2019-01-15 | 深圳市卡普瑞环境科技有限公司 | A kind of atmospheric molecule detection system having pre-reformer before gas is examined |
| CN109001131B (en) * | 2018-09-04 | 2020-10-02 | 深圳市卡普瑞环境科技有限公司 | Water molecule absorption spectrum acquisition method |
| CN111208043A (en) * | 2020-01-16 | 2020-05-29 | 中国科学院合肥物质科学研究院 | System and method for synchronously measuring moisture absorption growth factors of multiple optical parameters of aerosol |
| CN115482643A (en) * | 2022-08-24 | 2022-12-16 | 清华大学 | Fire smoke detector and detection method thereof |
| CN115482643B (en) * | 2022-08-24 | 2024-02-02 | 清华大学 | Fire smoke detector and detection method thereof |
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Application publication date: 20141029 |