Open AccessIntensity modulation‐based fibre optic vibration sensor using an aperture within a proof mass
Author(s) -
Zuo ZeWei,
Hao Yi,
Choi SangJin,
Song Minho,
Kim YoungChon,
Pan JaeKyung
Publication year - 2017
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2016.0167
Subject(s) - proof mass , sensitivity (control systems) , vibration , aperture (computer memory) , modulation (music) , optics , intensity modulation , intensity (physics) , dynamic range , acoustics , collimator , frequency modulation , physics , computer science , electronic engineering , engineering , phase modulation , radio frequency , telecommunications , phase noise
The authors propose an intensity modulation‐based fibre optic vibration sensor (FOVS) using an aperture within a proof mass. It consists of an optical collimator, a mass‐spring structure, a mirror, and a rectangular aperture. They verify its feasibility via experimental demonstration. For the feasibility test, they implement three lab‐based prototype FOVSs with different natural frequencies and measure each FOVS's frequency response according to the base vibration and sensitivity. The experimental results for three lab‐based prototype FOVSs show the sensitivities of 163, 183, and 206 mV/g, the minimum detectable accelerations of 0.082, 0.086, and 0.082 mg, and the dynamic ranges of 18–45, 26–52, and 20–120 Hz, respectively. They also experimentally demonstrate its remote sensing and multipoint sensing characteristics. The proposed FOVS has the virtues of easy controllable sensitivity and dynamic range, simple structure, and remote sensing and multipoint sensing characteristics.