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Concentration detection method, device and system of multi-component gas

A concentration detection, multi-component technology, applied in the field of laser spectroscopy, can solve the problems of multi-component gas detection sensitivity and accuracy limitations

Inactive Publication Date: 2018-08-21
LASER RES INST OF SHANDONG ACAD OF SCI
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Problems solved by technology

Due to the existence of various cross-interferences, the sensitivity and accuracy of existing multi-component gas detection are greatly limited, which has become a technical bottleneck in multi-component gas detection.

Method used

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  • Concentration detection method, device and system of multi-component gas
  • Concentration detection method, device and system of multi-component gas
  • Concentration detection method, device and system of multi-component gas

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] Due to the cross-interference between gases, the detection sensitivity and accuracy of multi-component gas concentration using optical methods are low. Based on this, the multi-component gas concentration detection method, device and system provided by the embodiments of the present invention can be used for the detection of the concentration of each gas in a mixed gas and the...

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Abstract

The invention provides a concentration detection method, device and system of multi-component gas. The method comprises the steps as follows: acquiring a spectral signal of background gas and a spectral absorption signal of to-be-detected mixed gas; calculating the absorption section of the mixed gas in a window in each absorption peak position according to the absorption peak position of gases and the size of corresponding windows; calculating the concentration of the gases in the mixed gas according to the pre-established corresponding relation between the absorption sections of gases and concentration. The synchronous detection of the multi-component gas under the single light source is realized, cross interference of different gases is eliminated, and the detection sensitivity and accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of laser spectrum analysis, in particular to a method, device and system for detecting the concentration of multi-component gases. Background technique [0002] In recent years, gas detection methods based on optical methods have high detection sensitivity, no need for sample preparation, easy maintenance, and easy real-time on-line detection in the area and in situ, so they have received more and more attention in the field of gas analysis. At present, the main optical detection methods that have been practically used are differential absorption lidar technology DIAL (Differential Absorption Lidar), differential absorption spectroscopy technology DOAS (Differential Optical Absorption Spectroscopy), Fourier transform infrared spectroscopy technology FTIR (Fourier Transform Infrared Spectroscopy), laser Induced fluorescence technology LIF (Laser-Induced Fluorescence), laser-induced breakdown spectroscopy LIBS...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/39
CPCG01N21/01G01N21/39
Inventor 张婷婷宁雅农胡杰李艳芳魏玉宾王寅王兆伟刘统玉
Owner LASER RES INST OF SHANDONG ACAD OF SCI
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