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Background estimation method and system for spectral gas detection

A technology of gas detection and background estimation, which is applied in the field of spectral analysis, can solve problems such as inability to detect, and achieve the effect of improving signal-to-noise ratio and estimation accuracy

Active Publication Date: 2020-04-14
HUBEI JIUZHIYANG INFRARED SYST CO LTD
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Problems solved by technology

[0003] The technical problem solved by the present invention is to provide a background estimation method and system for spectral gas detection, which estimates the background spectrum of the known target gas, and solves the problem that the gas detection algorithm based on the background acquisition method is difficult to obtain the gas background. undetectable problems

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  • Background estimation method and system for spectral gas detection
  • Background estimation method and system for spectral gas detection
  • Background estimation method and system for spectral gas detection

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with accompanying drawing:

[0049] Before performing background spectrum estimation, the present invention needs to know the standard spectrum of the target gas for background estimation in advance, and then can estimate the background radiation of the target gas in the detection area. The present invention collects a hyperspectral image by performing spectral gas detection on the area where the target gas exists; then calculates the abundance value of the spectrum corresponding to each pixel of the hyperspectral image, and compares it with a preset abundance threshold to detect The area is divided into target area and non-target area; then clustering processing is performed to group pixels with large similarities together, thereby improving the estimation accuracy of the background spectrum; after clustering, dimensionality reduction processing is performed to improve the signal-to-noise ratio; th...

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Abstract

The invention, which belongs to the technical field of spectral analysis, provides a background estimation method and system for spectral gas detection. The method is used for estimating a backgroundspectrum of target gas for a specific occasion, so that a detection problem of the traditional gas detection algorithm based on a background acquisition method under the condition that a gas background is difficult to obtain is solved. The method comprises the following steps: calculating an abundance value by utilizing a collected spectral image, comparing the abundance value with an abundance threshold value, and dividing a detected region into a target region and a non-target region; clustering the target region to obtain at least one target category and a corresponding target category matrix; carrying out dimension reduction on the target category matrix; finding out a background wave band matrix; and then calculating the background radiation of the target gas in the detection region corresponding to each target category. According to the method, the full-waveband background spectrum is estimated through the spectrum of the background waveband, and the spectrum containing the target spectrum information is converted into the spectrum only containing the background information.

Description

technical field [0001] The invention relates to the technical field of spectral analysis, in particular to a background estimation method and system for spectral gas detection. Background technique [0002] Spectral analysis is one of the important methods for gas detection and its concentration analysis. In recent years, with the improvement of data processing, data transmission, and data storage technology, spectral analysis has begun to be applied to on-site online analysis of gases. When using spectroscopic equipment for gas detection, it is often necessary to know the spectral background of the gas to be measured in advance. According to Beer's law, gas permeability is the basic variable for quantitative detection. When measuring the transmittance, it is necessary to determine the empty background. When the empty background cannot be obtained, gas quantitative detection cannot be completed. Therefore, it is necessary to estimate the background spectrum of the known ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25G06T7/11G06T7/136G06T3/00G06K9/62
CPCG01N21/25G06T7/11G06T7/136G06F18/23213G06T3/06
Inventor 岳松王波洪普贾国伟彭堂超
Owner HUBEI JIUZHIYANG INFRARED SYST CO LTD