A fiber bragg grating-based thin-film sensor for measuring dynamic water pressure
Journal
IEEE Sensors Journal
Journal Volume
18
Journal Issue
18
Start Page
7383
End Page
7391
ISSN
1530437X
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
Demodulation Technique
Fiber Bragg
Thin-film Sensor
Water Pressure
Demodulation
Fiber Optic Sensors
Optical Variables Measurement
Pressure Sensors
Thin Films
Transfer Matrix Method
Demodulation Techniques
Dynamic Pressure Measurements
Dynamic Water Pressures
Fiber Bragg
Sensing Characteristics
Strain Distributions
Thin Film Sensors
Water Pressures
Fiber Bragg Gratings
Publisher
Institute of Electrical and Electronics Engineers Inc.
Type
journal article