A method for processing saturated spectrum of tunable diode absorption spectrum wide range detection

By using spectral signal processing methods for TDLAS technology, adaptive identification of gas absorption saturation and reconstruction of complete absorption spectra were achieved. Combined with an environmental compensation model, the limitations of TDLAS technology in terms of range and accuracy in gas absorption saturation scenarios were solved, enabling wide-range and high-precision detection.

CN121834144BActive Publication Date: 2026-07-24ANHUI CENFENG TECH CO LTD
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Patent Information

Application Number
CN202610312709.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-03-16
Publication Date
2026-07-24
Estimated Expiration
2046-03-16

AI Technical Summary

Technical Problem

Existing TDLAS technology has limited range and insufficient detection accuracy in gas absorption saturation scenarios. Furthermore, existing solutions suffer from high complexity, response delay, high hardware cost, and blind spectral processing strategies.

Method used

By denoising and baseline correction of the original absorption spectrum signal, extracting multiple spectral feature parameters to calculate saturation quantization values, and combining spectral reconstruction algorithms to reconstruct the complete absorption spectral profile, adaptive spectral reconstruction and concentration detection are achieved by employing a dual-modal weighted fusion mechanism and a real-time environmental compensation model.

Benefits of technology

It achieves high-precision gas detection across the entire range, smoothly transitions between different concentration ranges, counteracts environmental interference, and ensures detection stability and accuracy without the need for additional hardware.

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Abstract

The application discloses a kind of tunable diode absorption spectrum wide-range detection saturated spectrum processing method, it is related to spectral gas detection technical field.The tunable diode absorption spectrum wide-range detection saturated spectrum processing method, by the original absorption spectrum signal is carried out denoising and baseline correction, obtain effective spectrum signal, and extract multiple spectral feature parameters to calculate saturated quantization value, according to the quantization value, using spectral reconstruction algorithm reconstructs complete absorption spectral line profile, and the weight of absorption spectrum and wavelength modulation spectrum is calculated by S function, in combination with ambient temperature, pressure and compensation model, preliminary concentration value is corrected, and accurate final gas concentration is output.The application is by constructing saturated quantization evaluation system, stratified adaptive spectral reconstruction strategy, dual-mode detection fusion mechanism and working condition compensation model, without additional hardware, realize wide-range high-precision gas detection, eliminate environmental interference and saturation influence.
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