Title :
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
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;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-8879-8
DOI :
10.1109/IMTC.2005.1604271
