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Gas concentration analyzing method and device

A gas concentration and analysis device technology, which is applied in the direction of measuring devices, analyzing materials, and material analysis through optical means, can solve the problems of light energy decline, difficulty in meeting trace gas detection requirements, and low spectral signal-to-noise ratio

Pending Publication Date: 2018-04-27
青岛崂应环境科技有限公司
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AI Technical Summary

Problems solved by technology

The narrower the slit, the higher the spectral resolution of the spectrometer; however, the narrower slit will cause a decrease in light energy, resulting in a lower spectral signal-to-noise ratio, which is difficult to meet the detection requirements of trace gases
In the traditional gas concentration analysis method, the technical problem of mutual restriction between spectral resolution and signal-to-noise ratio affects the accuracy of gas detection
[0004] In the traditional gas concentration analysis method, there is no effective solution to the technical problem of mutual restriction between spectral resolution and signal-to-noise ratio

Method used

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  • Gas concentration analyzing method and device

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Embodiment 1

[0043] Such as Figure 1 to Figure 4 As shown, the embodiment of the present invention provides a gas concentration analysis device.

[0044] Reference figure 1 , The gas concentration analysis device includes: a light source 1, a collimator 2, a gas chamber 3, a dispersion meter 4, and a measuring instrument 5.

[0045] The gas chamber 3 is sealed with the gas to be measured;

[0046] The light source 1 is used to emit light covering the characteristic absorption spectrum of the gas to be measured;

[0047] The collimator 2 is used to collimate the light emitted by the light source 1 and irradiate it to the gas chamber 3;

[0048] The disperser 4 is used to converge and disperse the light transmitted by the gas chamber 3, so that the convergence points of light of different wavelengths are dispersed in the target direction, where the target direction is the direction in which the light exits from the disperser 4;

[0049] The measuring instrument 5 is used to receive the light energy o...

Embodiment 2

[0074] An embodiment of the present invention provides a gas concentration analysis method, such as Figure 4 Shown, including:

[0075] Step S1, the collimation step, collimate the light emitted by the light source and irradiate it to the gas chamber, where the gas chamber is sealed with the gas to be measured, and the light emitted by the light source covers the characteristic absorption spectrum of the gas to be measured;

[0076] Step S2, the dispersion step, converges and disperses the light transmitted through the gas chamber, so that the convergence points of light of different wavelengths are dispersed in the target direction, where the target direction is the propagation direction of the light after exiting the disperser;

[0077] Step S3, a measurement step, receives light energy from different convergence points in the target direction, and analyzes the concentration of the gas to be measured according to the light energy at the convergence point.

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Abstract

The invention provides a gas concentration analyzing method and device, and relates to the technical field of analysis of gas concentration. The device comprises a light source, a collimator, a gas chamber, a dispersion instrument and a measuring instrument, wherein measured gas is sealed in the gas chamber; the light source is used for emitting light which covers a characteristic absorbing spectrum of the measured gas; the collimator is used for collimating the light emitted from the light source and then radiating the light to the gas chamber; the dispersion instrument is used for convergingand dispersing light which transmits through the gas chamber, so that converged points of light with different wavelengths are distributed in a target direction, and the target direction is a transmission direction of the light after the light exits from the dispersion instrument; and the measuring instrument moves in the target direction to receive optical energy of the different converged points, and analyzes the concentration of the measured gas according to the optical energy of the converged points. The technical problem that spectral resolution and signal-to-noise ratio restrain mutually in a traditional method which analysis the concentration of measured gas sealed by the gas chamber is solved, and the ability of detecting trace gas is improved.

Description

Technical field [0001] The present invention relates to the technical field of gas concentration analysis, in particular to a gas concentration analysis method and device. Background technique [0002] The optical absorption method based on Lambert-Beer law is one of the basic methods of gas detection. The continuous absorption spectrum gas detection based on Lambert-Beer law has the characteristics of strong anti-interference ability, and is especially suitable for gases in complex background environments. Detection. Among them, the continuous absorption spectrum gas detection of the gas collected in the closed gas chamber has a wide range of applications in the field of scientific research. [0003] The commonly used method for detecting continuous absorption spectrum gas in a closed gas chamber is to use a prism dispersion type or a grating dispersion type spectrometer for spectrum collection. Both types of spectrometers have an incident slit for light waves. The narrower the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/31
CPCG01N21/01G01N21/3103
Inventor 王新全武婧刘羽嘉
Owner 青岛崂应环境科技有限公司
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