Highly sensitive liquid level monitoring system utilizing polymer fiber Bragg gratings

Carlos A.F. Marques; Gang-Ding Peng; David J. Webb

doi:10.1364/OE.23.006058

Highly sensitive liquid level monitoring system utilizing polymer fiber Bragg gratings

Carlos A.F. Marques
, Gang-Ding Peng
, David J. Webb

Aston Institute of Photonic Technologies (AiPT)

University of New South Wales, Australia

Research output: Contribution to journal › Article › peer-review

191 Citations (Scopus)

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.

Original language	English
Pages (from-to)	6058–6072
Number of pages	15
Journal	Optics Express
Volume	23
Issue number	5
Early online date	26 Feb 2015
DOIs	https://doi.org/10.1364/OE.23.006058
Publication status	Published - 9 Mar 2015

Bibliographical note

Funding: Marie Curie Intra European Fellowship included in the 7th
Framework Program of the European Union (POSSIBLE PIEF-GA-2013-628604 project).

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title = "Highly sensitive liquid level monitoring system utilizing polymer fiber Bragg gratings",

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.",

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AU - Marques, Carlos A.F.

AU - Peng, Gang-Ding

AU - Webb, David J.

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Highly sensitive liquid level monitoring system utilizing polymer fiber Bragg gratings

Abstract

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