Abstract
A new version of a sensor for temperature measurements in the case of strong laser intensity fluctuation was developed. It was based on tunable diode laser absorption spectroscopy (TDLAS) with wavelength modulation, logarithmic conversion of the absorption signal, and detection of the first harmonic of the modulation frequency. The efficiency of the technique was demonstrated under experimental conditions with excess multiplicative noise. Temperature was evaluated from the ratio of integrated absorbance of two lines of the water molecule with different lower energy levels. Two algorithms of data processing were tested, simultaneous fitting of two spectral ranges with selected absorption lines and independent fitting of two absorption lines profiles. The correctness of the gas temperature evaluation was verified by simultaneous measurements with a commercial thermocouple. An error in temperature evaluation of less than 40 at 1000 K was achieved even when processing a single scan of the diode lasers.
Funder
Institute of Spectroscopy of Russian Academy of Sciences
Subject
Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry
Reference37 articles.
1. Lackner, M., Winter, F., and Agarwal, A.K. (2010). Handbook of Combustion, Wiley-VCH Verlag GmbH & Co., KGaA.
2. An optical method for the measurement of combustion gas temperature in particle laden flows;Tobiasson;Exp. Therm Fluid Sci.,2018
3. Stanimirović, I., and Stanimirović, Z. (2018). Temperature Sensing, IntechOpen.
4. High-Temperature Gas Sensors for Harsh Environment Applications: A Review;Ghosh;Clean-Soil Air Water,2019
5. Tunable diode laser spectroscopy as a technique for combustion diagnostics;Bolshov;Spectrochim. Acta Part B At. Spectrosc.,2015
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