A method for determining the background average absorbance of laser-induced fluorescence of a combustion reaction analysis

By using two similar cameras to simultaneously capture fluorescence signals at different distances in laser-induced fluorescence testing, and calculating absorbance parameters and absorption rate, the problem of quantitative analysis of fluorescence signal absorption attenuation is solved, thus improving the accuracy and reliability of measurement results.

CN121740823BActive Publication Date: 2026-06-09XIAN THERMAL POWER RES INST CO LTD
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Patent Information

Application Number
CN202610237926.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-02-28
Publication Date
2026-06-09
Estimated Expiration
2046-02-28

AI Technical Summary

Technical Problem

Existing laser-induced fluorescence testing methods fail to effectively account for the absorption attenuation of fluorescence signals during propagation in the reaction gas, resulting in insufficient accuracy and reliability of measurement results and making quantitative analysis impossible.

Method used

Two cameras with similar response characteristics are used to simultaneously capture images on both sides of the reaction chamber. The absorbance parameter is calculated by the ratio of fluorescence intensity under different distance configurations, and the absorption rate is calculated by combining the Beer-Lambert law to eliminate the influence of differences in camera response characteristics.

Benefits of technology

This method enables quantitative analysis of the propagation and attenuation of laser-induced fluorescence signals in reactant gases, improving the accuracy and reliability of measurement results and providing a basis for error correction. It is applicable to two-dimensional and one-dimensional laser-induced fluorescence testing systems.

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Abstract

The application discloses a kind of combustion reaction analysis laser-induced fluorescence background average absorbance determination method, it is related to combustion test and laser-induced fluorescence technical field, it can at least partly solve the technical problem of quantitative analysis of the propagation decay of laser-induced fluorescence signal in reaction gas in prior art.This application includes: constructing laser-induced fluorescence testing device, two cameras are located at the two sides of reaction cavity respectively;First measurement state is configured to make the distance of two cameras from reaction cavity present preset multiple relationship, synchronous acquisition fluorescence image and calculate first fluorescence intensity ratio;Synchronous acquisition fluorescence image and calculate second fluorescence intensity ratio;Based on the two fluorescence intensity ratio and the preset multiple relationship, calculate absorbance parameter;According to the absorbance parameter and fluorescence propagation path distance, calculate absorption rate.The application realizes laser-induced fluorescence signal absorption quantitative analysis, and provides key error analysis basis for combustion reaction kinetics research.
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Citation Information

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