Temperature-insensitive 2D inclinometer based on pendulum-assisted fiber Bragg gratings

Di Zheng; Zhuodan Liu; Ignazio Floris; Salvador Sales

doi:10.1117/12.2539286

28 August 2019 Temperature-insensitive 2D inclinometer based on pendulum-assisted fiber Bragg gratings

Di Zheng, Zhuodan Liu, Ignazio Floris, Salvador Sales

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 1119905 (2019) https://doi.org/10.1117/12.2539286
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

A temperature-insensitive 2-D inclinometer by incorporating two fiber Bragg gratings (FBGs) with a homogeneous pendulum transducer is proposed and experimentally demonstrated. The two FBGs are located in two orthogonal planes of the pendulum and only half of each FBG is glued on the surface of the columnar rod. Due to the strain difference between glued- and non-glued part of each FBG, the reflection spectrum of each FBG splits into two peaks. The direction and magnitude of inclination can be readily determined by measuring the wavelength separations of the split peak in two FBGs, whilst the temperature-induced cross-sensitivity is eliminated. A sensitivity of 0.047 nm/° with an accuracy of 0.23° is achieved within the tilt angle range of -20°–+20°.

Citation Download Citation

Di Zheng, Zhuodan Liu, Ignazio Floris, and Salvador Sales "Temperature-insensitive 2D inclinometer based on pendulum-assisted fiber Bragg gratings", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 1119905 (28 August 2019); https://doi.org/10.1117/12.2539286

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