Gas concentration measuring method and system thereof

A technology for gas concentration measurement and gas concentration, which is used in the measurement of color/spectral characteristics and the preparation of samples for testing. Effect

Inactive Publication Date: 2013-12-18
CHINA SECURITY & FIRE TECH GRP
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  • Abstract
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Problems solved by technology

However, this trace gas detection method requires the use of multiple infrared sensors, and the analysis time for trace gas concentration is too long and the accuracy is low

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  • Gas concentration measuring method and system thereof
  • Gas concentration measuring method and system thereof
  • Gas concentration measuring method and system thereof

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Embodiment Construction

[0026] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0027] figure 1 Shown is a flow chart of the gas concentration measuring method of the embodiment of the present invention.

[0028] Step S101, collecting background gas, and measuring the spectral lines of the background gas.

[0029] Since the spectral lines of the background gas are used as reference values ​​for the subsequent calculation of the spectral lines of the gas to be measured, the quality of the background gas measurement will directly affect the measurement accuracy of the subsequent gas to be measured. In the embodiment of the present invention, the background gas usually comes from a space with relatively good greening and little gas change, and usually the gas collected from a point near the green belt outside is used as...

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Abstract

A gas concentration measuring method includes the steps of collecting a background gas and measuring a spectral line of the obtained background gas, collecting a to-be-measured gas in a measuring area, mixing the collected to-be-measured gas with the background gas, measuring the mixed gas and calculating a spectral line of the to-be-measured gas according to the spectral line of the background gas, and analyzing the spectral line of the to-be-measured gas and calculating the concentration of the to-be-measured gas through a peak value gas converting algorithm. According to the gas concentration measuring method, according to the principle that gas absorbs light, spectrum of the to-be-measured gas can be obtained from measuring of the mixed gas according to the spectral line of the background gas, and through analysis of the spectrum and the mode of peak value converting, concentration of each trace gas can be accurately and quickly calculated. Besides, the invention further provides a gas concentration measuring system.

Description

technical field [0001] The invention relates to gas concentration analysis technology, in particular to a gas concentration measurement method and system thereof. Background technique [0002] In recent years, there have been a lot of analysis equipment for oxygen, carbon dioxide and other gases in building construction offices in reality, but for trace gases, such as CO, CH4, C2H4, C2H2, C2H6, H2 and other gases analysis and their devices are not Rarely, however, when these trace gases in the environment reach a certain concentration, they are harmful to the human body, and may also cause spontaneous combustion inside the equipment. Therefore, the monitoring of these trace gases plays a great role in the physical and mental health of the human body and environmental protection. role. [0003] The publication number "CN101776593A" in the Chinese Invention Patent Application Publication, titled "Active Gas Detection Method and Its Alarm Device", discloses an active gas detec...

Claims

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Application Information

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IPC IPC(8): G01N21/35G01N1/38
Inventor 邬志刚燕晋春
Owner CHINA SECURITY & FIRE TECH GRP
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