Amplitude and Phase Fluorescence-Spectroscopy Methods for Dissolved Oxygen Concentration Evaluation: Comparative Practical Results

Author

Grillo, Gustavo J. ; Pérez, Miguel A. ; Valledor, Marta ; Ramos, Rubén

Author_Institution

Electron. Technol. Area, Oviedo Univ., Gijon

Volume

2

fYear

2005

fDate

16-19 May 2005

Firstpage

922

Lastpage

924

Abstract

This paper shows the practical results from a detailed comparative study of amplitude and phase fluorescence-spectroscopy methods for dissolved oxygen concentration evaluation. These results were obtained with an implemented optoelectronic measurement system that guarantees near-optimal operation conditions for both methods and a commercial fluorescence optical-fiber sensor, which is excited by a continuous-regulated sinusoidal-amplitude modulated light beam. The comparison was made through the analysis of the time dependence of the fluorescent signal and the values of DC voltages proportional to amplitude and phase shift of the fluorescent emitted signal obtained for a constant dissolved oxygen concentration water sample at a controlled temperature

Keywords

chemical variables measurement; fibre optic sensors; fluorescence spectroscopy; oxygen; amplitude fluorescence spectroscopy; dissolved oxygen concentration; fluorescence lifetimes; optical fiber sensors; optoelectronic measurement system; phase fluorescence spectroscopy; Fluorescence; Optical modulation; Optical sensors; Optoelectronic and photonic sensors; Oxygen; Proportional control; Sensor systems; Signal analysis; Stimulated emission; Temperature control; Fluorescence spectroscopy; dissolved oxygen; fluorescence lifetimes; optical-fiber sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE

Conference_Location

Ottawa, Ont.

Print_ISBN

0-7803-8879-8

Type

conf

DOI

10.1109/IMTC.2005.1604271

Filename

1604271