Methane Detection at Low Concentration Based on 2f Harmonic Signal
Yingting Luo, Xudong Ouyang, Hao Wu, Feng Li, H. T. Song
Available Online August 2015.
- https://doi.org/10.2991/ic3me-15.2015.264How to use a DOI?
- Methane detection, low concentration, power transformer, harmonic detection, laser
- 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.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
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 - 3rd International Conference on Material, Mechanical and Manufacturing Engineering (IC3ME 2015) PB - Atlantis Press SN - 2352-5401 UR - https://doi.org/10.2991/ic3me-15.2015.264 DO - https://doi.org/10.2991/ic3me-15.2015.264 ID - Luo2015/08 ER -