Low-Cost and High-Performance Optical Fiber-Based Sensor for Liquid Level Monitoring
authors Martins, J; Diaz, CAR; Domingues, MF; Ferreira, RAS; Antunes, P; Andre, PS
nationality International
journal IEEE SENSORS JOURNAL
author keywords Liquid level; Fabry-Perot; fiber fuse effect; diaphragm; strain; temperature
keywords FABRY-PEROT; PRESSURE SENSOR; MICRO-CAVITY; TEMPERATURE
abstract Liquid level sensing is nowadays a relevant issue in a broad range of applications, forcing the sensors performance and cost to be evaluated in parallel. This paper proposes a fiber optic-based liquid level sensor system using a fiber Fabry-Perot interferometer (FPI) embedded into a polyurethane resin diaphragm. The FPI is based on microcavities generated upon catastrophic fuse effect, enabling the fiber recycling and sensors fabrication in a cost-effective way, compared to traditional methods. To enable the simultaneous temperature control, a fiber Bragg grating was used as thermal reference sensor to compensate the temperature cross-sensitivity. The sensor prototype was tested in a field application, using two different configurations, an open chamber configuration, where the diaphragm is in contact with the atmosphere, and a closed chamber configuration revealing the sensitivities of 4.4 +/- 0.1 pm/mm and 1.57 +/- 0.04 pm/mm, respectively. These sensitivity values are within the figures of merit for diaphragm-based sensors as reported recently.
publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
issn 1530-437X
year published 2019
volume 19
issue 13
beginning page 4882
ending page 4888
digital object identifier (doi) 10.1109/JSEN.2019.2895549
web of science category Engineering, Electrical & Electronic; Instruments & Instrumentation; Physics, Applied
subject category Engineering; Instruments & Instrumentation; Physics
unique article identifier WOS:000471023000018
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