Method for precisely measuring concentration of sulfur dioxide gas by using detector
A technology for precise measurement and gas concentration, applied in measuring devices, color/spectral characteristic measurement, instruments, etc., can solve problems such as inaccurate measurement of sulfur dioxide gas concentration, and achieve the effects of eliminating interference factors, ensuring stability, and ensuring accuracy
Active Publication Date: 2018-09-21
HEILONGJIANG INST OF TECH
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[0004] The invention aims to solve the technical problem of inaccurate measurement of the existing sulfur dioxide gas concentration
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[0025] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. 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.
[0026] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0027] Such as figure 1 As shown, the present invention aims to solve the technical problem of inaccurate measurement of the existing sulfur dioxide gas concentration. A method for accurately measuring the concentration of sulfur dioxide gas with a dual-wavelength narrow pulse width is proposed, inclu...
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Abstract
The invention relates to a method for precisely measuring the concentration of sulfur dioxide gas by using a detector. The method comprises the following steps: enabling a beam of pump light to entera first resonant cavity, and forming first detection laser; enabling another beam of pump light to enter a second resonant cavity, and forming second detection laser; directly transmitting the first detection laser and the second detection laser to a sample pool (22), after the laser is reflected for multiple times in the sample pool (22), enabling the laser to exit from a light emission opening of the sample pool (22), then converging the laser into a detector (25) by virtue of an adjustable convergent lens (24), converting the light signal into an electric signal by the detector (25), transmitting the electric signal to a data acquisition card (26), reading, by a computer (27), the data from the data acquisition card (26), and obtaining a precise gas concentration value N by virtue of analysis and calculation. Double wavelengths are used for measuring and used as reference standard for each other so as to calibrate a pulse width, so that the precise measurement result is obtained, and the high precision detection of the sulfur dioxide gas can be satisfied.
Description
technical field [0001] The invention relates to a method for detecting the concentration of sulfur dioxide gas, in particular to a method for accurately measuring the concentration of sulfur dioxide gas with dual wavelengths and narrow pulse width. Background technique [0002] Industry and commerce usually require accurate measurement of harmful gases in a certain space to ensure the safety of this space. Currently, harmful gases that need to be protected include SO 2 、H 2 S, CO, etc. Whether the claimed hazardous gases meet certain purity limits and / or whether the emissions of these gases comply with environmental regulations. Typical applications such as process control, emissions and environmental monitoring, security, and air conditioning require accurate concentration measurement. [0003] Wavelength modulation spectroscopy is a way to enhance the sensitivity of gas measurements, especially when measuring smaller concentrations. Usually, the concentration of the g...
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IPC IPC(8): G01N21/31
CPCG01N21/3151
Inventor 李林军杨玉强叶光超刘艳微周龙
Owner HEILONGJIANG INST OF TECH