CN203101225U - Aerosol absorption coefficient measuring system - Google Patents
Aerosol absorption coefficient measuring system Download PDFInfo
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- CN203101225U CN203101225U CN 201320123060 CN201320123060U CN203101225U CN 203101225 U CN203101225 U CN 203101225U CN 201320123060 CN201320123060 CN 201320123060 CN 201320123060 U CN201320123060 U CN 201320123060U CN 203101225 U CN203101225 U CN 203101225U
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Abstract
The utility model discloses an aerosol absorption coefficient measuring system comprising an extinction detection system, a scattered light detection system and a control and data acquisition system, wherein the extinction detection system comprises a semiconductor laser unit, an optical isolator, an optical fiber beam splitter, a wavelength measuring device, an optical fiber collimator, matched lenses, a sample reservoir, a focusing lens and a transmission light detector; the scattered light detection system comprises an integrating sphere and a scattered light detector arranged on the integrating sphere; and the control and data acquisition system is respectively connected with the semiconductor laser unit, a piezoelectric ceramic tube, the scattered light detector and the transmission light detector. By using the aerosol absorption coefficient measuring system, the extinction coefficient of aerosol is obtained by using a spectrum technology, meanwhile, the scattering coefficient of the aerosol is obtained by using an integrating sphere detecting technology, and then the aim of obtaining the absorption coefficient of the aerosol by using the spectrum technology is achieved.
Description
Technical field
The utility model relates to a kind of gasoloid absorption coefficient measuring system, is specifically related to a kind of gasoloid absorption coefficient measuring system of measuring extinction coefficient and scattering coefficient simultaneously.
Background technology
Atmospheric aerosol is meant by human factor and natural cause and enters the heterogeneous system that solid, liquid particle and carrier gas in the atmosphere are formed, have that spatial and temporal distributions is extensive, life cycle is different, spatial variations is huge, characteristics such as complex chemical composition, optical property are special, regional atmospheric is polluted and Global climate change, and there is material impact aspect such as atmosphere quality.
Studies show that atmospheric aerosol has weather chilling effect to a certain degree, particulate that mankind's activity causes increases the greenhouse gases that the weather chilling effect that caused can the partial offset mankind's activity causes and increases caused climate warming effect; Simultaneously, formation and development that gasoloid can the appreciable impact cloud and the precipitation process of following, and then aggravation arid and flood.But because gasoloid not only depends on the distribution of itself to the influence of radiation, also comprise the physicochemical property of gasoloid self and the optical property of underlying surface, and these factors all have great change in time and space rate, and therefore, aerocolloidal climatic effect is more than the climatic effect complexity of greenhouse gases.
Up to the present, aerocolloidal climatic effect is a factor of least determining in the climate change prediction that causes of mankind's activity.Nineteen ninety-five, Intergovernmental Panel on Climate Change of the United Nations (IPCC) assessment report for the third time points out, in numerous climate change effect factors, least determines and what remain deep understanding is that aerocolloidal radiation forces effect; 2007, the 4th report of IPCC pointed out, result to the artificial contribution of gasoloid can produce cooling effect, and aerocolloidal direct radiation is forced has bigger uncertainty, accurately assesses all kinds of aerocolloidal radiation effects and has important scientific meaning to reducing above-mentioned uncertainty.
Aerocolloidal radiation effect depends on absorption and the scattering process of particulate to light, and these two kinds of effects of particulate and light have confidential relation with aerocolloidal composition and particle diameter.Some observational studies in recent years show, away from artificially-contaminated sea area, gasoloid mainly comes from sea salt, and such gasoloid is far longer than absorption to the scattering of light effect; And in the hinterland, particulate has abundant artificial source and natural source, and for coal smoke, aerocolloidal photoextinction to be being absorbed as the master, and for sulfate, gasoloid such as hydrochlorate slightly, photoextinction then is based on scattering.Therefore, can not be general demarcate aerocolloidal radiation effect with extinction coefficient, must differentiate delustring, scattering and absorption contribution and influence to the gasoloid radiation effect.But for a long time, the measurement of gasoloid absorption coefficient always is a difficult problem.
Laser spectrum tech is widely used in qualitative, quantitative test field as a kind of method of research material fundamental characteristics, all becomes considerable analysis means at industrial sectors such as metallurgy, electronics, chemical industry, medicine, food.But, therefore, can't directly obtain aerocolloidal absorption coefficient with the laser absorption spectrum technology because gasoloid has scattering and absorption effect simultaneously to light.
Summary of the invention
The purpose of this utility model is the defective that exists in the prior art in order to solve, and a kind of measuring system that can effectively obtain the gasoloid absorption coefficient is provided.
In order to achieve the above object, the utility model provides a kind of gasoloid absorption coefficient measuring system, comprises delustring detection system and control and data acquisition system (DAS); The delustring detection system comprises semiconductor laser, optoisolator, fiber optic splitter, wavelength measurement device, optical fiber collimator, matched lenses, sample cell, condenser lens and transmitted light detector; By being divided into two bundles behind optoisolator and the fiber optic splitter, a branch of importing wavelength measurement device, another Shu Yici pass through optical fiber collimator, matched lenses, sample cell and condenser lens and import the transmitted light detector laser beam that semiconductor laser sends successively; Sample cell comprises steel pipe and is located at the plano-concave mirror at steel pipe two ends, and wherein one holds concave mirror level with both hands and links to each other with steel pipe by piezoelectric ceramic tube; Control links to each other with semiconductor laser, piezoelectric ceramic tube and transmitted light detector respectively with data acquisition system (DAS); Wherein the scattered light detection system comprises integrating sphere and the detector for scattered light that is fixed on the integrating sphere; Integrating sphere is located in the middle of the steel pipe of sample cell; The scattered light detection system links to each other with data acquisition system (DAS) with control by detector for scattered light.
Further improvement of the utility model is: detector for scattered light is a plurality of, be separately fixed on the different directions of integrating sphere, more accurately must obtain the gasoloid light-scattering coefficient, thereby utilize the relation between Aerosol Extinction and light-scattering coefficient and the absorption, obtain the gasoloid absorption coefficient with spectral technique.
Control comprises multi-channel data acquisition card, industrial computer, piezoelectric ceramics signal generator and piezoelectric ceramics signal amplifier with data acquisition system (DAS); The multi-channel data acquisition card links to each other with industrial computer with described transmitted light detector, detector for scattered light respectively; Industrial computer links to each other with the piezoelectric ceramics signal generator with semiconductor laser respectively; The piezoelectric ceramics signal generator links to each other with piezoelectric ceramic tube by the piezoelectric ceramics signal amplifier.
The utility model has the following advantages compared to existing technology: utilize spectral technique obtaining ability aspect the Aerosol Extinction and integrating sphere Detection Techniques in the ability of obtaining the aerosol scattering coefficient simultaneously, according to the relation between aerocolloidal extinction coefficient, absorption coefficient and the scattering coefficient, ingenious introducing integrating sphere Detection Techniques in many logical absorption spectrum technology, realization obtains the purpose of aerocolloidal absorption coefficient with the absorption spectrum technology.
Description of drawings
Fig. 1 is the structured flowchart of the utility model gasoloid absorption coefficient measuring system.
Among the figure, 1-semiconductor laser, 2-optoisolator, 3-fiber optic splitter, the 4-optical fiber collimator, 5-matched lenses, 6-sample cell, 61-integrating sphere, 62-steel pipe A, 63-steel pipe B, 64-plano-concave mirror A, 65-piezoelectric ceramic tube, 66-plano-concave mirror B, 7-condenser lens, 8-transmitted light detector, 9-multi-channel data acquisition card, the 10-industrial computer, 11-piezoelectric ceramics generator, 12-piezoelectric ceramics signal amplifier, 13-detector for scattered light A, 14-detector for scattered light B, 15-wavelength detection device.
Embodiment
Below in conjunction with accompanying drawing the utility model gasoloid absorption coefficient measuring system is elaborated.
The utility model gasoloid absorption coefficient measuring system comprises delustring detection system, scattered light detection system and control and data acquisition system (DAS).
As shown in Figure 1, delustring detection system is made up of semiconductor laser 1, optoisolator 2, fiber optic splitter 3, wavelength measurement device 15, optical fiber collimator 4, matched lenses 5, sample cell 6, condenser lens 7, transmitted light detector 8.The laser beam that semiconductor laser 1 sends is successively by optoisolator 2 and fiber optic splitter 3, and be divided into two bundles by fiber optic splitter 3, a branch ofly directly import wavelength measurement device 15 Laser Measurement wavelength by optical patchcord, another bundle is coupled in the sample cell 6 through optical fiber collimator 4 and pattern match lens 5, after seeing through the light line focus lens 7 of sample cell 6, focus on the photosurface of transmitted light detector 8.Sample cell 6 also is a stable optical resonator simultaneously, is made up of integrating sphere 61, the steel pipe A62 that is fixed on integrating sphere 61 both sides, steel pipe B63, the piezoelectric ceramic tube 65 that is fixed on the steel pipe B63 outside, the high reflectance plano-concave mirror B66 that is fixed on the high reflectance plano-concave mirror A62 in the steel pipe A62 outside and is fixed on piezoelectric ceramic tube 65 outsides.
The scattered light detection system is by semiconductor laser 1, optoisolator 2, fiber optic splitter 3, wavelength measurement device 15, optical fiber collimator 4, matched lenses 5, the integrating sphere 61 of delustring detection system, and detector for scattered light A 13 and detector for scattered light B14 composition, detector for scattered light A13 and detector for scattered light B14 are fixed on the different directions of integrating sphere 61.After laser beam enters sample cell 6, scattering takes place, by the scattered light intensity on detector for scattered light A 13 and the detector for scattered light B14 detection different directions in integrating sphere 61.
Control comprises industrial computer 10, piezoelectric ceramics signal generator 11, ceramic amplifier 12 and multi-channel data acquisition card 9 with data acquisition system (DAS).The output signal of transmitted light detector 8 and detector for scattered light A13, detector for scattered light B14 is through multi-channel data acquisition card 9 input industrial computers 10.Semiconductor laser 1 adopts the dfb semiconductor laser instrument, and industrial computer 10 is by the output wavelength of the temperature control panel and the Current Control plate control semiconductor laser 1 of connection semiconductor laser.The signal source that industrial computer 10 control piezoelectric ceramics signal generators 11 send is carried in after piezoelectric ceramics signal amplifier 12 zooms into high-voltage signal on the piezoelectric ceramic tube 65.
The measuring method and the principle of the utility model gasoloid absorption coefficient measuring system are: piezoelectric ceramics signal generator 11 is by industrial computer 10 controls, the signal that sends is after piezoelectric ceramics signal amplifier 12 amplifies, the high voltage that changes with certain rule puts on the piezoelectric ceramic tube 65 in the sample cell 6, piezoelectric ceramic tube 65 is under high-tension effect, himself length changes, and then the length generation microscale of sample cell 6 is changed.Be installed on the industrial computer 10 software by the semiconductor laser temperature control panel and (or) the Current Control plate, the output wavelength of control semiconductor laser 1 reaches the purpose of scan laser wavelength.Pass through optoisolator 2, beam splitter 3, optical collimator 4 and matched lenses 5 successively from the laser of laser instrument 1 output, be coupled in the sample cell 6, because sample cell 6 also is an optical resonator simultaneously, change when microscale takes place under the effect of piezoelectric ceramic tube 65 chamber of resonator cavity length, the chamber of satisfying resonator cavity long (
L) be optical maser wavelength (
) integral multiple (promptly
L=
n 
,
n=0,1,2 ...) time, laser promptly can be coupled to resonator cavity (sample cell 6 that has integrating sphere), the laser that is coupled to sample cell 6 will repeatedly come and go in sample cell 6, come and go the aerocolloidal delustring information of all carrying each time, the light signal line focus lens 7 that see through sample cell 6 focus on the transmitted light detector 8, transmitted light detector 8 is converted into electric signal with aerocolloidal delustring signal, import in the multi-channel data acquisition card 9 that links to each other with industrial computer 10, note by data acquisition on the industrial computer 10 and routine analyzer, see through the light signal strength of sample cell 6 and corresponding laser wave long value (optical maser wavelength is measured by wavelength measurement device 15) down by gathering different wave length, aerocolloidal extinction spectra can be obtained, from extinction spectra, aerocolloidal extinction coefficient can be obtained.
Measuring under the different wave length with transmitted light detector 8 through in the light signal strength of sample cell 6, measure aerocolloidal scattered light intensity under the different wave length with the detector for scattered light A13 and the detector for scattered light B14 that are connected on the integrating sphere 61, also scattered intensity is noted by data acquisition on the industrial computer 10 and routine analyzer simultaneously by multi-channel data acquisition card 9, obtain aerocolloidal scattered light information according to this, and then from scattered light information, obtain aerocolloidal scattering coefficient; Last according to the relation between aerocolloidal extinction coefficient, scattering coefficient and the absorption coefficient, and the system Aerosol Extinction and the scattering coefficient that record, aerocolloidal absorption coefficient obtained.
Claims (3)
1. a gasoloid absorption coefficient measuring system comprises delustring detection system and control and data acquisition system (DAS); Described delustring detection system comprises semiconductor laser, optoisolator, fiber optic splitter, wavelength measurement device, optical fiber collimator, matched lenses, sample cell, condenser lens and transmitted light detector; By being divided into two bundles behind optoisolator and the fiber optic splitter, a branch of importing wavelength measurement device, another Shu Yici pass through optical fiber collimator, matched lenses, sample cell and condenser lens and import the transmitted light detector laser beam that described semiconductor laser sends successively; Described sample cell comprises steel pipe and is located at the plano-concave mirror at steel pipe two ends, and wherein one holds concave mirror level with both hands and links to each other with described steel pipe by piezoelectric ceramic tube; Described control links to each other with semiconductor laser, piezoelectric ceramic tube and transmitted light detector respectively with data acquisition system (DAS); It is characterized in that: described scattered light detection system comprises integrating sphere and the detector for scattered light that is fixed on the integrating sphere; Described integrating sphere is located in the middle of the steel pipe of described sample cell; Described scattered light detection system links to each other with data acquisition system (DAS) with described control by described detector for scattered light.
2. gasoloid absorption coefficient measuring system according to claim 1 is characterized in that: described detector for scattered light is a plurality of.
3. gasoloid absorption coefficient measuring system according to claim 1 and 2 is characterized in that: described control and data acquisition system (DAS) comprise multi-channel data acquisition card, industrial computer, piezoelectric ceramics signal generator and piezoelectric ceramics signal amplifier; Described multi-channel data acquisition card links to each other with industrial computer with described transmitted light detector, detector for scattered light respectively; Described industrial computer links to each other with the piezoelectric ceramics signal generator with described semiconductor laser respectively; Described piezoelectric ceramics signal generator links to each other with described piezoelectric ceramic tube by described piezoelectric ceramics signal amplifier.
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| CN 201320123060 CN203101225U (en) | 2013-03-19 | 2013-03-19 | Aerosol absorption coefficient measuring system |
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| CN 201320123060 CN203101225U (en) | 2013-03-19 | 2013-03-19 | Aerosol absorption coefficient measuring system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132915A (en) * | 2014-08-08 | 2014-11-05 | 南京格术光电技术有限公司 | Small high-performance scattering-type visibility measuring device and measuring method thereof |
| CN104297115A (en) * | 2014-09-26 | 2015-01-21 | 深圳职业技术学院 | Detection method and detection device for number density of atmospheric particulate matters PM2.5 |
| CN104792703A (en) * | 2015-03-17 | 2015-07-22 | 浙江省计量科学研究院 | Laser multiple reflection photoacoustic spectroscopy technology-based aerosol optical absorption coefficient detection apparatus |
| CN105067529A (en) * | 2015-08-24 | 2015-11-18 | 中国科学院国家空间科学中心 | Optical measurement method for semiconductor device material absorption coefficient |
| CN105987864A (en) * | 2016-02-24 | 2016-10-05 | 中国科学院合肥物质科学研究院 | Integrating sphere embedded photo-thermal interferential aerosol scattering and absorbing synchronous measurement device |
| CN106840785A (en) * | 2017-04-10 | 2017-06-13 | 兰州大学 | The gas sampler and system of measurable aerosol concentration |
| 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 |
| CN107831159A (en) * | 2017-12-13 | 2018-03-23 | 中国科学院上海应用物理研究所 | The detection means of metallic element in a kind of aerosol |
| EP3526560A4 (en) * | 2016-10-11 | 2020-07-08 | Victoria Link Limited | A spectrometer apparatus for measuring spectra of a liquid sample using an integrating cavity |
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- 2013-03-19 CN CN 201320123060 patent/CN203101225U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104132915A (en) * | 2014-08-08 | 2014-11-05 | 南京格术光电技术有限公司 | Small high-performance scattering-type visibility measuring device and measuring method thereof |
| CN104297115A (en) * | 2014-09-26 | 2015-01-21 | 深圳职业技术学院 | Detection method and detection device for number density of atmospheric particulate matters PM2.5 |
| CN104792703A (en) * | 2015-03-17 | 2015-07-22 | 浙江省计量科学研究院 | Laser multiple reflection photoacoustic spectroscopy technology-based aerosol optical absorption coefficient detection apparatus |
| CN104792703B (en) * | 2015-03-17 | 2017-05-31 | 浙江省计量科学研究院 | Detection device for optical absorption coefficient of aerosol based on laser multiple reflections optoacoustic spectroscopy |
| CN105067529A (en) * | 2015-08-24 | 2015-11-18 | 中国科学院国家空间科学中心 | Optical measurement method for semiconductor device material absorption coefficient |
| CN105987864A (en) * | 2016-02-24 | 2016-10-05 | 中国科学院合肥物质科学研究院 | Integrating sphere embedded photo-thermal interferential aerosol scattering and absorbing synchronous measurement device |
| EP3526560A4 (en) * | 2016-10-11 | 2020-07-08 | Victoria Link Limited | A spectrometer apparatus for measuring spectra of a liquid sample using an integrating cavity |
| US10983045B2 (en) | 2016-10-11 | 2021-04-20 | Victoria Link Limited | Spectrometer apparatus for measuring spectra of a liquid sample using an integrating cavity |
| CN106840785A (en) * | 2017-04-10 | 2017-06-13 | 兰州大学 | The gas sampler and system of measurable aerosol concentration |
| 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 |
| CN107831159A (en) * | 2017-12-13 | 2018-03-23 | 中国科学院上海应用物理研究所 | The detection means of metallic element in a kind of aerosol |
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