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Carbon dioxide analyzer and analytical method thereof

A gas analyzer, carbon dioxide technology, applied in the direction of material analysis, material analysis through optical means, instruments, etc., can solve the problems of complex structure, high processing and assembly process requirements, etc.

Inactive Publication Date: 2009-02-11
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The main advantage of the optical probe structure is that there are no moving parts and high reliability, but its structure is complex and requires high processing and assembly techniques.

Method used

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  • Carbon dioxide analyzer and analytical method thereof
  • Carbon dioxide analyzer and analytical method thereof
  • Carbon dioxide analyzer and analytical method thereof

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Embodiment Construction

[0061] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention.

[0062] The basic idea of ​​the present invention is: the optical probe of the carbon dioxide gas analyzer adopts a space double optical path structure of single light source, single gas chamber and double detectors. When the light source is turned off, measure the voltage values ​​of the main detector and the reference detector in the optical probe respectively; Compare, eliminate the error introduced in the measurement process, and then use Lambert Beer's law to establish a measurement model, analyze the concentration of the carbon dioxide gas to be measured in the measurement gas chamber and the reference gas chamber, and calculate the gas concentration of carbon dioxide to be measured.

[0063] figure 1 It is a structural schematic diagram of the optical probe of the carbon dioxide gas analyzer in the...

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Abstract

The invention discloses a carbon dioxide gas analyzer and an analysis method thereof. The optical probe of the analyzer adopts a spatial double-optical path structure which is composed of a single light source, a single gas chamber and double detectors. The analysis method comprises the following steps: firstly, the values of the voltage at the two ends of the main detector and the reference detector in the optical probe are measured when the light source is turned off , then the values of the voltage at the two ends of the main detector and the reference detector are measured when the light source is turned on and after the infrared light emitted from the light source passes through the gas chamber, after the treatment of error elimination, by using the Lambert-Beer's Law as the theoretical basis and by combining with the working mechanism of a spatial double-optical path optical structure, the measurement model of the analyzer is established and calibrated, therefore, the gas concentration of carbon dioxide can be directly calculated and output by the analyzer through the measurement value. The carbon dioxide gas analyzer has the advantages of small volume, light weight, low power consumption, high reliability and high measurement accuracy.

Description

technical field [0001] The invention relates to a gas concentration measurement technology, in particular to a carbon dioxide gas analyzer and an analysis method thereof. Background technique [0002] The carbon dioxide gas analyzer is a special instrument for detecting the concentration of carbon dioxide. It has broad application prospects in the fields of industrial testing, metallurgy and chemical industry, environmental protection, medical diagnosis, crop cultivation, aerospace life support and space science. Various current application fields put forward higher and higher requirements on the performance of carbon dioxide gas analyzers. [0003] The optical probe is an important component of the infrared carbon dioxide gas analyzer. At present, it can be roughly divided into two structures, one is the time dual optical path, and the other is the spatial dual optical path. [0004] At present, most of them adopt time-dual optical path and pump-suction optical probe struc...

Claims

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Application Information

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IPC IPC(8): G01N21/35G06F19/00G01N21/3504
Inventor 张广军李亚萍李庆波
Owner BEIHANG UNIV
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