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

fYear

2011

fDate

Oct. 29 2011-Nov. 1 2011

Firstpage

632

Lastpage

636

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave & Optoelectronics Conference (IMOC), 2011 SBMO/IEEE MTT-S International

Conference_Location

Natal

ISSN

Pending

Print_ISBN

978-1-4577-1662-1

Type

conf

DOI

10.1109/IMOC.2011.6169396

Filename

6169396