Gas detection device
A technology of gas detection and buffer gas, which is applied in measuring devices, analyzing fluids using sound waves/ultrasonic waves/infrasonic waves, and using sound waves/ultrasonic waves/infrasonic waves for material analysis. It can solve problems such as low detection accuracy and weak photoacoustic signals. Achieve the effect of improving the detection accuracy and enhancing the power of light
Inactive Publication Date: 2021-11-05
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0033] see figure 1 , figure 1 It is a structural block diagram of the gas detection device provided by the embodiment of the present invention. The gas detection device provided by the embodiment of the present invention includes a laser generating module 1, a photoacoustic cell 2, and a processor 3;
[0034] The wavelength control end of the laser generating module 1 is connected to the processor 3;
[0035] One side of the photoacoustic cell 2 is provided wit...
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The invention provides a gas detection device which comprises a laser generation module, a photoacoustic cell and a processor, wherein the wavelength regulation and control end of the laser generation module is connected with the processor so as to enable the processor to modulate the wavelength of laser emitted by the laser generation module, a first reflecting prism is arranged on one side of the photoacoustic cell, a second reflecting prism is arranged on the other side of the photoacoustic cell, an incident light beam of the laser generating module is reflected back and forth between the first reflecting prism and the second reflecting prism to form multiple paths of reflecting light beams passing through the photoacoustic cell, to-be-detected gas in the photoacoustic cell reacts with the multiple paths of reflecting light beams to generate acoustic signals, the acoustic signals are converted into electric signals through the photoacoustic cell, and the electric signals are transmitted to the processor. Due to the fact that the first reflecting prism and the second reflecting prism are arranged on the two sides of the photoacoustic cell respectively, multiple paths of infrared light beams are formed, absorption of light in the photoacoustic cell is facilitated, the power of the light in the photoacoustic cell is enhanced, and the detection precision of the gas components is further improved.
Description
technical field [0001] The invention relates to the technical field of gas detection, in particular to a gas detection device. Background technique [0002] Gas detection technology has a wide range of applications in modern society, such as the determination of harmful gas content in the air, the concentration detection of ozone and biogas in agricultural production, the concentration detection of special gases in chemical and medical fields, etc. Gas is inseparable from gas detection technology. [0003] The photoacoustic gas detection device based on photoacoustic spectroscopy technology is a high-precision trace technology for gas detection by converting the light energy absorbed by the gas to be measured into acoustic wave energy. When the modulated laser is irradiated on the gas molecules to be measured, the gas molecules will absorb at the absorption line, transition from the ground state to the excited state, and then return to the ground state through collision rel...
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IPC IPC(8): G01N21/17G01N29/02G01N29/22
CPCG01N21/1702G01N29/02G01N29/222
Inventor 周福升廖建平王邸博高帆卓然陈宇飞
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD