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Proceedings Paper

Optical fiber sensors for flow measurement
Author(s): Sallehuddin Ibrahim; Robert Garnett Green; Ken Dutton
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Paper Abstract

The overall aim of this project is to investigate the use of optical fiber sensors for on-line monitoring of particles and droplets having low concentration being conveyed by a fluid. In this project, the system employs lensed optical fiber sensors developed using a low cost approach. A general mathematical model for the lens constructed at each end of the fiber optic was derived which takes into consideration that a large divergent beam is undesirable because it reduces the energy centered in the beam and can cause overlapping of adjacent transmitted beams at the receivers. Initially, the optical fibers are polished. Then, the lenses are formed using a specially-made heating platform. The receiver fiber is coupled to a photodiode, enabling the received light level to be measured. Optical fiber sensors are suitable for monitoring flowing materials where the conveyed component ratio is less than 10% vol./vol. The use of optical fibers provides an opportunity to design sensors with a very wide bandwidth, thus enabling the measurement of high speed flowing particles or droplets. The light extinction method used in this project is suitable for measurement of particles or droplets equal and greater than 100 micrometers .

Paper Details

Date Published: 31 August 2000
PDF: 5 pages
Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); doi: 10.1117/12.397903
Show Author Affiliations
Sallehuddin Ibrahim, Univ. Teknologi Malaysia (United Kingdom)
Robert Garnett Green, Sheffield Hallam Univ. (United Kingdom)
Ken Dutton, Sheffield Hallam Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 4074:
Applications of Optical Fiber Sensors

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