Multicomponent gas concentration quantitative analysis method implemented based on AOTF near infrared spectrograph

A near-infrared spectrometer, multi-component technology, used in color/spectral property measurement, material analysis by optical means, material analysis, etc. question

Inactive Publication Date: 2007-01-31
XI AN JIAOTONG UNIV
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Problems solved by technology

The analysis techniques of AOTF near-infrared spectroscopy include reflection spectroscopy and transmission spectroscopy. The existing AOTF near-infrared spectrometer is only equipped with a contact cover for solid detection and a detector for liquid detection, and can only be used for solid and liquid detection. Detection and quantitative analysis, there is no hardware and software means for gas detection, and there is no precedent for gas detection and quantitative analysis

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  • Multicomponent gas concentration quantitative analysis method implemented based on AOTF near infrared spectrograph
  • Multicomponent gas concentration quantitative analysis method implemented based on AOTF near infrared spectrograph
  • Multicomponent gas concentration quantitative analysis method implemented based on AOTF near infrared spectrograph

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Embodiment Construction

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and the embodiments completed by the inventors according to the above technical solutions. The following embodiments are only preferred examples, and the present invention is not limited to the examples.

[0016] see figure 1 The method of the present invention is as follows: the AOTF portable near-infrared spectrometer is equipped with a computer and a gas chamber for accommodating the measured gas, the gas chamber adopts a sealed structure, and the optical path is in the gas chamber, so as to avoid the interference of the outside air to the measured gas. The near-infrared light emitted by the AOTF portable near-infrared spectrometer is injected into the gas chamber, and then reflected by the mirror in the gas chamber back to the AOTF portable near-infrared spectrometer. The output data of the AOTF portable near-infrared spectrometer reflects the measured gas in ...

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Abstract

The invention discloses a multi-constituents gas thickness quantitative analysis method based on sound-optical adjustable filter near infrared light spectroscope. It installs a gas room to contain tested gas on the near infrared light spectroscope that connects to computer. The tested gas is loaded into the gas room where the reflector installed and connecting to liquid probe feeler arm. The near infrared light from the spectroscope would irradiate into gas room through incident fiber and reflected by the reflector to the test window of the liquid feeler arm and returning to the spectroscope through emergent fiber. Modeling software is installed in computer that would process the data output by the spectroscope and output the thickness value of the constituents in the gas. The invention could be used in solid, liquid test, and even gas.

Description

technical field [0001] The invention relates to a method for quantitative analysis of the concentration of multi-component gases applied to coal mines, tunnel excavation, natural gas, petroleum, chemical industry, flue gas, automobile exhaust, waste gas from waste combustion sites and others, particularly a method based on sound Optical tunable filter (Acousto-optic Tunable Filter, abbreviated as AOTF) near-infrared spectrometer realizes the quantitative analysis method of multi-component gas concentration, which can realize the concentration of multi-component mixed gas with absorption lines in the near-infrared band Quantitative analysis, such as: mixed gas composed of ammonia, hydrogen sulfide, methane, carbon monoxide, carbon dioxide, ethylene, acetylene and other gases. Background technique [0002] Martin and James invented gas chromatography in 1952. Gas chromatography has a wide analytical range, high sensitivity, good reliability and repr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/3504G01N21/359
Inventor 刘君华郝惠敏汤晓君
Owner XI AN JIAOTONG UNIV
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