Methane Detection at Low Concentration Based on 2f Harmonic Signal

DOI

10.2991/ic3me-15.2015.264How to use a DOI?

Keywords

Methane detection, low concentration, power transformer, harmonic detection, laser

Abstract

This paper presents the methane detection at low concentration based on 2f harmonic signal to achieve highly sensitive monitoring. Since methane is the characteristic gas in power transformer oil once a thermal fault at low temperature (<300°C). Based on wavelength modulation and tunable diode laser absorption spectroscopy(TDLAS) technique, the specific mathematical modeling of infrared gas absorption process, the input signal and the second harmonic signal after the methane gas through the absorption is calculated. Especially, the phase-sensitive detector lock-in amplifier is adopted to improve the sensitivity. Finally, the performance of the proposed methane detection schedule is simulated at the low hydrogen concentration. The results prove that the proposed optical detection has a high sensitivity of 0.052V at every 1 L/L.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yingting Luo
AU  - Xudong Ouyang
AU  - Hao Wu
AU  - Feng Li
AU  - H. T. Song
PY  - 2015/08
DA  - 2015/08
TI  - Methane Detection at Low Concentration Based on 2f Harmonic Signal
BT  - Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering
PB  - Atlantis Press
SP  - 1375
EP  - 1378
SN  - 2352-5401
UR  - https://doi.org/10.2991/ic3me-15.2015.264
DO  - 10.2991/ic3me-15.2015.264
ID  - Luo2015/08
ER  -