Highly sensitive liquid level monitoring system utilizing polymer fiber Bragg gratings

Marques, Carlos A.F., Peng, Gang-Ding and Webb, David J. (2015). Highly sensitive liquid level monitoring system utilizing polymer fiber Bragg gratings. Optics Express, 23 (5), 6058–6072.

Abstract

A novel and highly sensitive liquid level sensor based on a polymer optical fiber Bragg grating (POFBG) is experimentally demonstrated. Two different configurations are studied and both configurations show the potential to interrogate liquid level by measuring the strain induced in a POFBG embedded in a silicone rubber diaphragm, which deforms due to hydrostatic pressure variations. The sensor exhibits a highly linear response over the sensing range and a good repeatability. For comparison, a similar sensor using a FBG inscribed in silica fiber is fabricated, which displays a sensitivity that is a factor of 5 smaller than the POFBG. The temperature sensitivity is studied and a novel multi-sensor arrangement proposed which has the potential to provide level readings independent of temperature and the liquid density.

Publication DOI: https://doi.org/10.1364/OE.23.006058
Divisions: Engineering & Applied Sciences > Institute of Photonics
Engineering & Applied Sciences > Electrical, electronic & power engineering
Additional Information: Funding: Marie Curie Intra European Fellowship included in the 7th Framework Program of the European Union (POSSIBLE PIEF-GA-2013-628604 project).
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.osa ... ri=oe-23-5-6058 (Publisher URL)
Published Date: 2015-03-09
Authors: Marques, Carlos A.F.
Peng, Gang-Ding
Webb, David J. ( 0000-0002-5495-1296)

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