Details

Autor(en) / Beteiligte

• Diaz, Camilo A. R.
• Leal-Junior, Arnaldo G.
• Andre, Paulo S. B.
• Da Costa Antunes, Paulo Fernando
• Pontes, Maria Jose
• Frizera-Neto, Anselmo
• Ribeiro, Moises R. N.

Titel

Liquid Level Measurement Based on FBG-Embedded Diaphragms With Temperature Compensation

Ist Teil von

• IEEE sensors journal, 2018-01, Vol.18 (1), p.193-200

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2018

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• This paper proposes a fiber optic liquid level sensor system based on a silica fiber Bragg grating embedded into an epoxy resin diaphragm coupled to a temperature reference sensor, used to compensate the temperature cross-sensitivity for improving the liquid level measurement accuracy. The proposed system was tested in an industrial water tank with heating and recirculation. The results demonstrated a temperature cross-sensitivity reduction, enhancing the liquid level measurement thermal stability by a factor of nine, when compared with some single head sensor configurations reported in literature. Our system presents high linearity (R>0.999 ), superior sensitivity (2.8 pm/mm), and much lower temperature related error (1.04 mm/°C), when compared with the other diaphragm-based sensors recently reported in the literature.