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Gas detection method used for infrared gas analyzer

A gas analyzer and gas detection technology, applied in the direction of analyzing materials, material analysis by optical means, instruments, etc., can solve the problem of low accuracy of gas detection results, achieve simple and effective removal, improve accuracy, and compensate for drift errors Effect

Inactive Publication Date: 2011-07-20
深圳市赛宝伦科技有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a gas detection method with high accuracy for the defects of the existing gas detection results with low accuracy

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  • Gas detection method used for infrared gas analyzer
  • Gas detection method used for infrared gas analyzer

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] The infrared gas analyzer mainly includes an infrared light source, a sample gas chamber, an infrared detection chamber, and a sensor. The infrared detection chamber includes a front detection chamber and a rear detection chamber. The sensor is connected between the front detection chamber and the rear detection chamber, and the sample gas chamber and the infrared The detection chambers are placed in series in the propagation direction of the infrared light path of the infrared light source.

[0022] Its working principle is: the measured gas is filled into the sample gas chamber from the ai...

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Abstract

The invention discloses a gas detection method used for an infrared gas analyzer. The method comprises the following steps of: acquiring a flow difference signal measured by the infrared gas analyzer, and carrying out analog-to-digital conversion on the flow signal to obtain a digital flow difference signal; sequentially carrying out digital filtering, temperature compensating and pressure compensating on the flow difference signal to respectively eliminate interferences of interference component gases in a gas to be detected, ambient temperature and air pressure to obtain the flow difference signal; and carrying out nonlinear processing on the processed flow difference signal according to a Beer law, and calculating to obtain the concentration value of a measured component in the gas to be detected. By adopting the method disclosed by the invention, interferences of the interference component gases in the gas to be detected, the ambient temperature and the air pressure in the infrared gas analyzer can be effectively eliminated, drift error of hardware is compensated, and a high-accuracy concentration value of the measured component in the gas to be detected is obtained by calculation.

Description

technical field [0001] The invention relates to an infrared gas analyzer, in particular to a gas detection method for the infrared gas analyzer. Background technique [0002] Since the vibration and rotation spectra of most gas molecules are in the infrared band, when the frequency of the incident infrared radiation is the same as the characteristic frequency of the vibration and rotation of the molecules, the infrared radiation will be absorbed by the gas molecules, causing the attenuation of the radiation intensity. Infrared gas analyzer is made by using the principle that gas molecules absorb infrared radiation. It has the characteristics of high measurement accuracy, fast speed and continuous measurement. It is widely used in petrochemical, metallurgy, mechanical processing, pharmaceutical, biochemical, environmental, etc. Protection, quality monitoring, cement and other fields and the automotive industry (engine performance monitoring system), quality inspection of high...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/17
Inventor 李明黄宝进陈晔何任群赵占兵林伟华曾永龙梁师伟刘荣祁周志斌胡和娟黄先锋李海辉刘武平王永红尹彪
Owner 深圳市赛宝伦科技有限公司
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