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Sensors 2015, 15(12), 30693-30703; doi:10.3390/s151229811

Corrosion Resistant FBG-Based Quasi-Distributed Sensor for Crude Oil Tank Dynamic Temperature Profile Monitoring

1
Federal Institute of Espírito Santo, Av. Filogônio Peixoto 2220, Bairro Aviso, Linhares 29901-291, Brazil
2
Federal University of Espírito Santo, Department of Electrical Engineering, Av. Fernando Ferrari, 514, Goiabeiras, Vitória 29075-910, Brazil
3
Federal Institute of Espírito Santo, Rodovia ES 010, km 6.5-Manguinhos, Serra 29173-087, Brazil
4
Instituto de Telecomunicações, I3N and Physics Department, University of Aveiro, Campus Universitário de Santiago, Aveiro 3810-193, Portugal
5
Instituto de Telecomunicações and Department of Electrical and Computer Engineering, Superior Technical Institute , University of Lisbon, Av. Rovisco Pais, Lisbon 1049-001, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 9 August 2015 / Accepted: 30 November 2015 / Published: 5 December 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [2189 KB, uploaded 5 December 2015]   |  

Abstract

This article presents a corrosion resistant, maneuverable, and intrinsically safe fiber Bragg grating (FBG)-based temperature optical sensor. Temperature monitoring is a critical activity for the oil and gas industry. It typically involves acquiring the desired parameters in a hazardous and corrosive environment. The use of polytetrafluoroethylene (PTFE) was proposed as a means of simultaneously isolating the optical fiber from the corrosive environment and avoiding undesirable mechanical tensions on the FBGs. The presented sensor head is based on multiple FBGs inscribed in a lengthy single mode fiber. The sensor presents an average thermal sensitivity of 8.82 ± 0.09 pm/°C, resulting in a typical temperature resolution of ~0.1 °C and an average time constant value of 6.25 ± 0.08 s. Corrosion and degradation resistance were verified by infrared spectroscopy and scanning electron microscopy during 90 days exposure to high salinity crude oil samples. The developed sensor was tested in a field pilot test, mimicking the operation of an inland crude tank, demonstrating its abilities to dynamically monitor temperature profile. View Full-Text
Keywords: FBG; crude oil; PTFE; temperature FBG; crude oil; PTFE; temperature
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

da Silva Marques, R.; Prado, A.R.; da Costa Antunes, P.F.; de Brito André, P.S.; Ribeiro, M.R.N.; Frizera-Neto, A.; Pontes, M.J. Corrosion Resistant FBG-Based Quasi-Distributed Sensor for Crude Oil Tank Dynamic Temperature Profile Monitoring. Sensors 2015, 15, 30693-30703.

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