Fiber-optic liquid level monitoring system using microstructured polymer fiber Bragg grating array sensors: performance analysis

C.A.F. Marques, A. Pospori, D. Sáez-Rodríguez, K. Nielsen, O. Bang, D.J. Webb

Research output: Chapter in Book/Report/Conference proceedingConference publication

Abstract

A highly sensitive liquid level monitoring system based on microstructured polymer optical fiber Bragg grating (mPOFBG) array sensors is reported for the first time. The configuration is based on five mPOFBGs inscribed in the same fiber in the 850 nm spectral region, showing the potential to interrogate liquid level by measuring the strain induced in each mPOFBG embedded in a silicone rubber (SR) diaphragm, which deforms due to hydrostatic pressure variations. The sensor exhibits a highly linear response over the sensing range, a good repeatability, and a high resolution. The sensitivity of the sensor is found to be 98 pm/cm of water, enhanced by more than a factor of 9 when compared to an equivalent sensor based on a silica fiber around 1550 nm. The temperature sensitivity is studied and a multi-sensor arrangement proposed, which has the potential to provide level readings independent of temperature and the liquid density.

Original languageEnglish
Title of host publication24th international conference on Optical Fibre Sensors
Place of PublicationBellingham, WA (US)
PublisherSPIE
Number of pages4
ISBN (Print)978-1-6284-1839-2
DOIs
Publication statusPublished - 28 Sep 2015
Event24th international conference on Optical Fibre Sensors - Curitiba, Brazil
Duration: 28 Sep 20152 Oct 2015

Publication series

NameSPIE proceedings
PublisherSPIE
Volume9634
ISSN (Print)0277-786X

Conference

Conference24th international conference on Optical Fibre Sensors
Abbreviated titleOFS 2015
CountryBrazil
CityCuritiba
Period28/09/152/10/15

Bibliographical note

C. A. F. Marques ; A. Pospori ; D. Sáez-Rodríguez ; K. Nielsen ; O. Bang and D. J. Webb, "Fiber optic liquid level monitoring system using microstructured polymer fiber Bragg grating array sensors: performance analysis", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96345V (September 28, 2015).

Copyright 2015 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

DOI: http://dx.doi.org/10.1117/12.2193898

Funding: Marie Curie Intra European Fellowships included in the 7th Framework Program of the European Union (projects PIEF-GA-2013-628604 and PIEF-GA-2011-302919); People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme FP7/2007-2013/ under REA grant agreement No. 608382.

Keywords

  • biber Bragg gratings
  • high sensitivity
  • liquid level monitoring systems
  • polymer optical fiber sensors

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    Zhang, W., Chen, X., Liu, C., Lu, Y., Cardoso, M. & Webb, D. J., 28 Sep 2015, 24th international conference on Optical Fibre Sensors. Kalinowski, H. J., Fabris, J. L. & Bock, W. J. (eds.). Bellingham, WA (US): SPIE, 4 p. 96343K. (SPIE proceedings; vol. 9634).

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