A Fiber Bragg Grating-Based Thin-Film Sensor for Measuring Dynamic Water Pressure
Journal
IEEE Sensors Journal
Journal Volume
18
Journal Issue
18
Pages
7383-7391
Date Issued
2018
Author(s)
Abstract
We present a fiber Bragg grating (FBG)-based thin-film sensor for monitoring dynamic response of water pressure. The proposed pressure sensor is simply composed of a round thin film substrate and an FBG glued on the film surface across the center. The sensing characteristic of the proposed pressure sensor is analyzed from the strain distribution on the thin-film substrate with the couple-mode theory and the transfer-matrix formulation. The thin-film substrate of the FBG allows the proposed sensor to perform dynamic pressure measurement with high sensitivity. Three demodulation techniques, based on the spectrometer, the matching FBG filter, and the chirped FBG filter, are employed with the proposed FBG pressure sensor. By comparison with a commercial pressure sensor, we first demonstrate that the proposed pressure sensor is capable of detecting static pressure within 5 Pa. Then, the proposed pressure sensor is employed to measure dynamic water pressure with a resolution of a 2 Pa inside a tank of water subjected to point-wise impacts at the water surface. The experimental results clearly indicate that the proposed FBG-based thin-film sensor is capable of monitoring dynamic water pressure with high sensitivity and resolution.
Subjects
Fiber Bragg; thin-film sensor; water pressure; demodulation technique
SDGs
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Type
journal article