CN2762115Y - CMOS environment monitoring spectrograph - Google Patents
CMOS environment monitoring spectrograph Download PDFInfo
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- CN2762115Y CN2762115Y CNU2005200683175U CN200520068317U CN2762115Y CN 2762115 Y CN2762115 Y CN 2762115Y CN U2005200683175 U CNU2005200683175 U CN U2005200683175U CN 200520068317 U CN200520068317 U CN 200520068317U CN 2762115 Y CN2762115 Y CN 2762115Y
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Abstract
The utility model relates to a gas monitoring optical spectrum instrument, namely, a CMOS gas monitoring optical spectrometer. The utility model comprises two parabolic reflecting mirrors (1-a, 1-b) which are correspondingly arranged, wherein the focus point of the parabolic reflecting mirror (1-a) is provided with an optical source (2). The utility model is characterized in that the focus point of the parabolic reflecting mirror (1-b) is provided with optical fiber (3) which is connected to a monochromator (4); a receiving unit of the monochromator (4) uses a CMOS array detector (5), and a control computer (6) is connected to the CMOS array detector (5). The utility model has the characteristic of acquiring all band optical spectrum information in one time; thereby, the utility model has the advantages that the cost of the instrument is reduced, the influence of atmospheric disturbance is reduced through instantaneous acquisition, the ingredients and the concentration of different polluting gas can be simultaneously monitored, the mean value of all the monitoring paths can be measured, system errors including stray light can be automatically eliminated, and real-time wavelength calibration is realized by software. The utility model can be widely used in monitoring air quality, automobile tail gas, pollution sources, etc.
Description
Affiliated technical field:
The utility model relates to a kind of gas-monitoring spectral instrument, i.e. CMOS gas-monitoring spectrometer.
Background technology:
Adopt optical method for measuring dusty gas composition and concentration, can make sample remain at gaseous state, no reagent loss, maintenance is little, is the main trend of current environment monitoring.The dusty gas monitoring technology can be summarized as: high pressure xenon lamp is a light source, be collimated into parallel light emergence by parabolic mirror,, enter beam splitting system by by the receiving end parabolic mirror light being converged behind the sample gas, different wavelengths of light is received by detector, with the incident light spectrum spectral information that relatively is absorbed.Absorption spectrum has comprised in a large number from atmospheric molecule, aerocolloidal scattering, the wide spectral composition that the light spectrum rises and falls, the spectral selectivity of catoptron etc. caused, by absorption spectrum is carried out the higher order polynomial match, obtain to absorb the feature difference spectrum of molecule divided by polynomial fitting curve with former absorption spectrum, remove the broadband composition influence, the reference spectra of the normal concentration of the absorption molecule that difference absorption spectrum and laboratory are obtained is carried out match, calculates concentration.Because the spectrum monitoring method adopts the line sampling, helps the sign to air quality, have advantages such as polycomponent monitoring, convenient operating maintenance, maintenance cost be low simultaneously.But measuring system is a detector with the point type photomultiplier at present, can only adopt the mechanical scanning mode that spectrum is carried out pointwise and survey, increase instrument cost on the one hand, reduce system reliability, owing to can not gather all band spectral information simultaneously, be subject to the atmospheric disturbance influence on the other hand.
The utility model content:
In order to solve the weak point that existing Detection Techniques exist, the utility model proposes environmental monitoring spectrometer based on the New-type CMOS detector array, adopt the camera shooting type spectra collection, there is not mechanical sweep unit, cost is low, reliability is high; Can instantaneous picked-up all band spectral information, it is little influenced by atmospheric disturbance.
The technical solution of the utility model is: described CMOS environmental monitoring spectrometer, comprise the parabolic mirror that the two sides is oppositely arranged, wherein the focus place of a parabolic mirror is provided with light source, the focus place that it is characterized in that the another side parabolic mirror is provided with optical fiber, described optical fiber is connected on the monochromator, the receiving element of described monochromator adopts the CMOS detector array, and this detector is connected with control computer.
Principle of work of the present utility model is: the light that described light source sends, be collimated into parallel light emergence by parabolic mirror, by the receiving end parabolic mirror light is converged and to be coupled into optical fiber, import monochromator by optical fiber, monochromator is decomposed into a series of highly purified monochromatic light with the complex light that optical fiber imports, form outgoing spectrum, receive and carry out the photosignal conversion by CMOS detector array shooting, then the data transmission that produces is handled and stored to computing machine, by with emission spectrum, the monitoring gaseous spectrum compares, analyzes, and determines dusty gas composition and concentration.
The beneficial effects of the utility model are: compared with the prior art, the utlity model has following characteristics:
(1) the utility model is by in system core part---and spectra collection partly uses the CMOS detector array, thereby has avoided the mechanical scanning part in the existing system, can disposablely obtain all band spectral information.Not only reduced instrument cost, and can reduce the atmospheric disturbance influence by instantaneous collection.(2) can monitor multiple dusty gas composition, concentration simultaneously, measure all monitoring path mean value.(3) can eliminate systematic error automatically and comprise and floating, realize real-time wavelength scaling by software from light (stray light).The utility model can be widely used in aspects such as air quality, vehicle exhaust and pollution source monitoring.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described further:
Fig. 1 is a structural representation of the present utility model.
Embodiment
Referring to accompanying drawing 1, described CMOS environmental monitoring spectrometer comprises parabolic mirror 1-a, 1-b that the two sides is oppositely arranged, and wherein the focus place of parabolic mirror 1-a is provided with light source 2, and light source 2 adopts high pressure xenon lamp.The focus place of another side parabolic mirror 1-b is provided with optical fiber 3, and optical fiber 3 is connected on the monochromator 4, and the receiving element of monochromator 4 adopts CMOS detector array 5, and CMOS detector array 5 is connected with control computer 6.High pressure xenon lamp 2 emission light are collimated into parallel light emergence via parabolic mirror 1-a, by receiving end parabolic mirror 1-b light is converged and to be coupled into optical fiber 3, import monochromator 4 by optical fiber 3, monochromator 4 is decomposed into a series of highly purified monochromatic light with the complex light that optical fiber 3 imports, and project on the CMOS detector array 5 at rear, receive overall optical spectral coverage data by 5 shootings of CMOS detector array, after machine 6 is gathered as calculated, compare with emission spectrum, monitoring gaseous spectrum, determine dusty gas composition and concentration by the correlation spectrum analysis.
Main monitoring technology index of the present utility model is as follows:
| Index | SO 2 | NOx | O 3 | The CO aromatics |
| Measuring limit | 0.5ppb | 0.5ppb | 0.8ppb | 2ppm 1ppb |
| The linearity | ＜1％ | ＜1％ | ＜1％ | ＜5％ ＜1％ |
| Response time | 2min | 2min | 1min | 5min 2min |
| Total error | ＜2％ | |||
Claims (1)
1. the CMOS gas-monitoring spectrometer that relates to of the utility model, comprise the parabolic mirror (1-a, 1-b) that the two sides is oppositely arranged, wherein the focus place of parabolic mirror (1-a) is provided with light source (2), the focus place that it is characterized in that parabolic mirror (1-b) is provided with optical fiber (3), described optical fiber (3) is connected with monochromator (4), the receiving element of monochromator (4) adopts CMOS detector array (5), and CMOS detector array (5) is connected with control computer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200683175U CN2762115Y (en) | 2005-01-14 | 2005-01-14 | CMOS environment monitoring spectrograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200683175U CN2762115Y (en) | 2005-01-14 | 2005-01-14 | CMOS environment monitoring spectrograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2762115Y true CN2762115Y (en) | 2006-03-01 |
Family
ID=36095235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200683175U Expired - Fee Related CN2762115Y (en) | 2005-01-14 | 2005-01-14 | CMOS environment monitoring spectrograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2762115Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841038A (en) * | 2017-03-23 | 2017-06-13 | 华东师范大学 | A kind of gaseous spectrum test device based on ellipsoid structure |
| CN110132943A (en) * | 2019-05-31 | 2019-08-16 | 清华大学 | The method for improving laser induced breakdown spectroscopy repeatability based on mixed-gas environment |
-
2005
- 2005-01-14 CN CNU2005200683175U patent/CN2762115Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841038A (en) * | 2017-03-23 | 2017-06-13 | 华东师范大学 | A kind of gaseous spectrum test device based on ellipsoid structure |
| CN106841038B (en) * | 2017-03-23 | 2023-05-12 | 华东师范大学 | Gas spectrum testing device based on ellipsoidal structure |
| CN110132943A (en) * | 2019-05-31 | 2019-08-16 | 清华大学 | The method for improving laser induced breakdown spectroscopy repeatability based on mixed-gas environment |
| CN110132943B (en) * | 2019-05-31 | 2021-01-15 | 清华大学 | Method for improving laser-induced breakdown spectroscopy repeatability based on mixed gas environment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |