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http://dx.doi.org/10.5573/ieie.2014.51.6.078

Novel Intensity-Based Fiber Optic Vibration Sensor Using Mass-Spring Structure  

Yi, Hao (Department of Electrical Engineering, Smart Grid Research Center, Chonbuk National University)
Kim, Hyeon-Ho (Department of Electrical Engineering, Smart Grid Research Center, Chonbuk National University)
Choi, Sang-Jin (Department of Electrical Engineering, Smart Grid Research Center, Chonbuk National University)
Pan, Jae-Kyung (Department of Electrical Engineering, Smart Grid Research Center, Chonbuk National University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.51, no.6, 2014 , pp. 78-86 More about this Journal
Abstract
In this paper, a novel intensity-based fiber optic vibration sensor using a mass-spring structure, which consists of four serpentine flexure springs and a rectangular aperture within a proof mass, is proposed and its feasibility test is given by the simulation and experiment. An optical collimator is used to broaden the beam which is modulated by the displacement of the rectangular aperture within the proof mass. The proposed fiber optic vibration sensor has been analyzed and designed in terms of the optical and mechanical parts. A mechanical structure has been designed using theoretical analysis, mathematical modeling, and 3D FEM (Finite Element Method) simulation. The relative aperture displacement according to the base vibration is given using FEM simulation, while the output beam power according to the relative displacement is measured by experiment. The simulated sensor sensitivity of $15.731{\mu}W/G$ and detection range of ${\pm}6.087G$ are given. By using reference signal, the output signal with 0.75% relative error shows a good stability. The proposed vibration sensor structure has the advantages of a simple structure, low cost, and multi-point sensing characteristic. It also has the potential to be made by MEMS (Micro-Electro-Mechanical System) technology.
Keywords
vibration sensor; intensity-based; fiber optic sensor; mass-spring structure;
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Times Cited By KSCI : 1  (Citation Analysis)
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