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ID 116471
Author
Sung, Jiun-Yu National Taiwan University of Science and Technology
Chen, Jin-Kai National Taiwan University of Science and Technology
Liaw, Shien-Kuei National Taiwan University of Science and Technology
Keywords
optical sensing
fiber Bragg grating (FBG)
peak detection
fitting
regression
filtering
Content Type
Journal Article
Description
Fiber Bragg gratings (FBGs) are widely applied in optical sensing systems due to their advantages including being simple to use, high sensitivity, and having great potential for integration into optical communication systems. A common method used for FBG sensing systems is wavelength interrogation. The performance of interrogation based sensing systems is significantly determined by the accuracy of the wavelength peak detection processing. Direct maximum value readout (DMVR) is the simplest peak detection method. However, the detection accuracy of DMVR is sensitive to noise and the sampling resolution. Many modified peak detection methods, such as filtering and curve fitting schemes, have been studied in recent decades. Though these methods are less sensitive to noise and have better sensing accuracy at lower sampling resolutions, they also confer increased processing complexity. As massive sensors may be deployed for applications such as the Internet of things (IoT) and artificial intelligence (AI), lower levels of processing complexity are required. In this paper, an efficient scheme applying a three-point peak detection estimator is proposed and studied, which shows a performance that is close to the curve fitting methods along with reduced complexity. A proof-of-concept experiment for temperature sensing is performed. 34% accuracy improvement compared to the DMVR is demonstrated.
Journal Title
Sensors
ISSN
14248220
Publisher
MDPI
Volume
21
Issue
7
Start Page
2306
Published Date
2021-03-25
Rights
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
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language
eng
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departments
Science and Technology