Development of a data analysis method in a TDLAS gas analyzer
https://doi.org/10.34680/2076-8052.2025.3(141).455-467
Abstract
In this article we discuss the development of a data analysis method for a gas analyzer based on tunable diode laser absorption spectroscopy (TDLAS), designed for high-precision measurement of moisture in natural gas. The problem of accurately monitoring water vapor content in the gas industry is driven by the risks of corrosion, hydrate formation, and equipment failures, especially under changing thermodynamic conditions. Among existing moisture measurement methods, tunable diode laser absorption spectroscopy stands out for its high sensitivity, stability, and minimal dependence on pressure and temperature. The article provides a detailed description of the structural diagram of the analyzer based on TDLAS, which includes both hardware and software components. The hardware part covers the laser module, analytical, reference, and baseline channels, as well as pressure and temperature sensors. The software block includes algorithms for spectral segment extraction, logarithmization, normalization, and comparison with the HITRAN database. Special attention is given to methods of correcting spectral interferences caused by impurities such as methane and carbon dioxide. The proposed method eliminates the need for direct contact of sensitive elements with the gas mixture, reducing operational costs and ensuring stable and accurate system performance even at low moisture concentrations.
About the Authors
E. Yu. Khadzhiyskaya
MIREA – Russian technological university
Russian Federation
Russian Federation
Moscow
M. V. Pokrovskaya
MIREA – Russian technological university
Russian Federation
Russian Federation
Moscow
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Review
For citations:
Khadzhiyskaya E.Yu., Pokrovskaya M.V. Development of a data analysis method in a TDLAS gas analyzer. Vestnik of Novgorod State University. 2025;(3(141)):455-467. (In Russ.) https://doi.org/10.34680/2076-8052.2025.3(141).455-467
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