Abstract
SUMMARY Acetylene in oil is an important characteristic gas which reflects early discharge faults of transformer and other oil-immersed electrical equipment. Laser-based photoacoustic spectroscopy techniques of high sensitivity and good selectivity can be well applied to detect trace gases. A portable and tunable experimental setup with a distributed feedback diode laser has been developed in this paper. The photoacoustic cell property parameters, the relationships between the photoacoustic signals and the laser power and the acetylene gas concentrations were analysed experimentally. By means of diode laser wavelength modulation, the high-resolution acetylene photoacoustic spectrum near 1.5 µm in the first overtone band near infrared was investigated. A novel method of photoacoustic quantitative analysis was proposed on the basis of least square regression. The theoretical and experimental results show the feasibility of on-line monitoring of acetylene and designing a tunable photoacoustic spectrometer with high sensitivity. Copyright © 2011 John Wiley & Sons, Ltd.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.