Title :
Contributions to the optimization of an optical sensor for acetylene and carbon monoxide
Author :
Soares, Vladimir Homobono ; De Morais, Caio Renan Leal ; De Lima, Ricardo Ataíde ; Fontana, Eduardo ; Martins-Filho, Joaquim Ferreira
Author_Institution :
Electron. & Syst. Dept., Fed. Univ. of Pernambuco, Recife, Brazil
fDate :
Oct. 29 2011-Nov. 1 2011
Abstract :
An optical fiber sensor based on harmonic detection for real time monitoring of dissolved gases in the insulating oil of high-voltage transformers has been developed for fault detection. The present work describes contributions to the optimization of the sensor system, using a DFB laser, which is modulated by the local oscillator of a lock-in amplifier, also used for harmonic detection of the spectral line of the gas molecule under test. A detailed study was developed toward sensor optimization by using C2H2 and CO as the test gases.
Keywords :
amplifiers; carbon compounds; distributed feedback lasers; fault diagnosis; fibre optic sensors; gas sensors; monitoring; optical modulation; organic compounds; oscillators; power transformers; CO; DFB laser; acetylene gas; carbon monoxide gas; dissolved gases; fault detection; gas molecule; harmonic detection; high-voltage transformers; insulating oil; local oscillator; lock-in amplifier; optical fiber sensor; real time monitoring; sensor optimization; spectral line detection; Absorption; Carbon; Fiber lasers; Harmonic analysis; Oil insulation; Power transformer insulation; Spectroscopy; Oil insulation; optical fiber sensor; optical spectroscopy; power transformers;
Conference_Titel :
Microwave & Optoelectronics Conference (IMOC), 2011 SBMO/IEEE MTT-S International
Conference_Location :
Natal
Print_ISBN :
978-1-4577-1662-1
DOI :
10.1109/IMOC.2011.6169396
