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Method for processing gas concentration signal in Raman gas analyzer

A gas concentration, Raman gas technology, applied in the field of signal processing, to achieve the effect of eliminating random noise interference, meeting response time, and meeting requirements

Active Publication Date: 2015-01-07
WUHAN CUBIC OPTOELECTRONICS
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Problems solved by technology

[0002] In the laser Raman gas analyzer, in order to ensure the accuracy of the measurement, the measured gas concentration signal can be processed, and the processing method is the superposition method to amplify the gas concentration signal, but these need to be at the expense of the response time

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  • Method for processing gas concentration signal in Raman gas analyzer

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Embodiment

[0040] Concrete steps of the present invention are as follows:

[0041] 1) Obtain the original spectral signal;

[0042] 2) Spectral signal preprocessing, the spectral signal preprocessing method refers to the method of amplifying the gas concentration signal by the superposition method. In order to reduce the response time, the number of superpositions is relatively small.

[0043] 3) Calculate the gas concentration of each component;

[0044] 4) Judging whether the high concentration signal is stable, if it is unstable, directly output the gas concentration of each component; if it is stable, perform secondary processing of the low concentration spectral signal, then recalculate the gas concentration of each component, and then output each component gas concentration. Among them, the secondary processing method of the low-concentration spectral signal refers to the method of amplifying the gas concentration signal by the superposition method. In order to improve the measur...

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Abstract

The invention discloses a method for processing a gas concentration signal in a Raman gas analyzer and relates to a signal processing method, in particular to the method for processing the gas concentration signal in the Raman gas analyzer. The method comprises the following specific steps: 1, acquiring an initial spectral signal; 2, preprocessing the spectral signal; 3, calculating gas concentration of each component; 4, judging whether a high-concentration signal is stable, directly outputting the gas concentration of each component if the high-concentration signal is instable, and if the high-concentration signal is stable, carrying out secondary processing on a low-concentration spectral signal, then recalculating the gas concentration of each component and outputting the gas concentration of each component. The method disclosed by the invention not only can effectively eliminate influence of random noise interference and ensures accuracy of measurement, but also can meet the requirement for response time.

Description

technical field [0001] The invention relates to a signal processing method, in particular to a method for processing gas concentration signals in a Raman gas analyzer. Background technique [0002] In the laser Raman gas analyzer, in order to ensure the accuracy of the measurement, the measured gas concentration signal can be processed, and the processing method is the superposition method to amplify the gas concentration signal, but these need to be at the expense of the response time. The invention solves the contradiction between the measurement accuracy and the response time of the instrument. Contents of the invention [0003] The invention mainly solves the technical problems existing in the prior art; it provides a method that can not only effectively eliminate the influence of random noise interference, ensure the accuracy of measurement, but also meet the requirement of response time. [0004] Above-mentioned technical problem of the present invention is mainly s...

Claims

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Application Information

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IPC IPC(8): G01N21/65
Inventor 熊友辉刘志强聂晓楠江坤田蕾石平静
Owner WUHAN CUBIC OPTOELECTRONICS
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