Method for measuring gas component concentration in inverse calculation mode based on differential optical absorption spectrum

A technique of differential absorption spectroscopy and gas composition, which is applied in the measurement of color/spectral characteristics, etc.
CN102435567AInactive Publication Date: 2012-05-02浙江微兰环境科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
浙江微兰环境科技有限公司
Publication Date
2012-05-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for measuring gas component concentration in an inverse calculation mode based on a differential optical absorption spectrum. In the method for measuring the gas component concentration in the inverse calculation mode based on the differential optical absorption spectrum, a mathematic model is established and solved by a least square method, the contents of various pollutants in flue gas can be recorded in real time, and the gas which comprises unknown components can be determined. Meanwhile, the invention provides a solution scheme aiming at main factors which influence the precision of differential optical absorption spectroscopy (DOAS), analysis errors due to spectral line shift can be effectively reduced, and the precision problem of the gas component concentration measurement in which absorption spectral lines are superposed is solved.
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Description

technical field

[0001] The invention relates to a method for measuring the concentration of gas components with overlapping absorption lines. Background technique

[0002] In the 1980s, Platt et al. promoted the application of differential absorption spectroscopy (DOAS) in the study of the tropospheric atmosphere. Since then, DOAS technology has developed rapidly, and many research institutions design instruments using DOAS technology according to their own research characteristics. These applications include air pollution monitoring, volcanic gas analysis of the troposphere, stratospheric gas composition monitoring, etc.

[0003] By the end of the 1980s, DOAS technology was widely recognized as a means of gas detection. OPSIS determined the basic structure of the DOAS system, and other companies also launched their own commercial DOAS systems, and proposed many improvements in structure, hardware, and software algorithms. train of thought. In 1990, Axelson and others fir...

Claims

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