A method for precisely measuring the concentration of sulfur dioxide through a spectrometer
A technology for precise measurement and gas concentration, applied in the direction of color/spectral characteristic measurement, etc., can solve the problem of inaccurate measurement of sulfur dioxide gas concentration, achieve the effect of eliminating interference factors, ensuring accuracy, and accurate measurement results
Active Publication Date: 2018-11-06
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] like 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, includin...
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Abstract
The invention relates to a method for precisely measuring the concentration of sulfur dioxide with dual wavelengths and narrow pulse width. The method includes following steps: a pump light beam is emitted to a first resonant cavity to form first detection laser; another pump light beam is emitted to a second resonant cavity to form second detection laser; the first detection laser and the seconddetection laser are directly transmitted to a sample cell (22), after a plurality of times of reflection in the sample cell (22), ejected from an emergent port (23) of the sample cell (22), and converged into an absorption spectrometer (25) through an adjustable convergent lens (24); the absorption spectrometer (25) converts received optical signals into electric singles and sends the electric signals to a computer (26); and the computer (26) calculates a measurement value N1 of the first detection laser and a measurement value N2 of the second detection laser through analysis so as to obtaina precise gas concentration value N. Dual wavelengths are adopted for measurement, are adopted as reference standard for each other for pulse width calibration, a precise measurement result is obtained, and high-precision measurement of sulfur dioxide is achieved.
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
CPCG01N21/31
Inventor 李林军白云峰申英杰潘伟平许聪
Owner HEILONGJIANG INST OF TECH