Research on spectral baseline correction of FBG sensor network based on the improved EMD method

Home > Archive>Volume 43, Issue 1, 2022 >190-197

Research on spectral baseline correction of FBG sensor network based on the improved EMD method
DOI:
                        
                    
CSTR:
                        [cstr]
                    
Author:
                        Lyu ZhengLyu Zheng
1. School of Instrument and Opto Electronic Engineering, Beijing Information Science & Technology University，2. Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University
Find this author on All Journals
Find this author on BaiDu
Search for this author on this site
Zhuang WeiZhuang Wei
1. School of Instrument and Opto Electronic Engineering, Beijing Information Science & Technology University，2. Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University，3. School of Instrument and Opto Electronic Engineering, Beijing Information Science & Technology University,4. Beijing Key Laboratory of Optoelectronic Measurement Technology
Find this author on All Journals
Find this author on BaiDu
Search for this author on this site
Wu YueWu Yue
1. School of Instrument and Opto Electronic Engineering, Beijing Information Science & Technology University，2. Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University，3. School of Instrument and Opto Electronic Engineering, Beijing Information Science & Technology University,4. Beijing Key Laboratory of Optoelectronic Measurement Technology
Find this author on All Journals
Find this author on BaiDu
Search for this author on this site
Zhang XuZhang Xu
1. School of Instrument and Opto Electronic Engineering, Beijing Information Science & Technology University，2. Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University
Find this author on All Journals
Find this author on BaiDu
Search for this author on this site
Zhu LianqingZhu Lianqing
1. School of Instrument and Opto Electronic Engineering, Beijing Information Science & Technology University，2. Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University，3. School of Instrument and Opto Electronic Engineering, Beijing Information Science & Technology University,4. Beijing Key Laboratory of Optoelectronic Measurement Technology
Find this author on All Journals
Find this author on BaiDu
Search for this author on this site

                    
Affiliation:
Clc Number:TH74 TP212
Fund Project:

Article

Figures

Metrics

Reference

Cited by

Materials

Comments

Abstract:

The baseline of the fiber Bragg grating (FBG) sensor network spectrum signal drifts, which is caused by the environmental conditions. To address this issue, this study proposes a spectrum baseline correction method based on the improved empirical mode decomposition (EMD). When this method is used to process simulation data, the spectrum after processing can be divided into the reflection peak regions of each FBG by setting the threshold value. The feasibility of the improved EMD method is verified. The spectral signals of the FBG sensor network with baseline drift under the influence of optical fiber path loss and end reflection are collected by experiments. The improved EMD method, the wavelet soft threshold method and the penalty least square method are used to achieve the real-time correction of the spectrum. The Gaussian nonlinear fitting method calculates the center wavelength of each FBG of the normal and corrected spectra. Results show that the survival rates of the sensing signal are increased by 48. 9% and 61. 6% , with the average deviation and deviation of each FBG center wavelength calculated after the use of the improved EMD method. The standard deviation values are the smallest, which are 4. 33, 6. 28 and 6. 01, 6. 58 pm. The spectral signal corrected by this method could provide reliable information for physical quantity detection.

Key words:FBG sensor network; spectrum signal correction; improved EMD method; threshold

Get Citation

Copy

Article Metrics

Abstract:
PDF:
HTML:
Cited by:

History

Received:
Revised:
Adopted:
Online: February 06,2023
Published:

Home

Introduction

Current Issue

Editorial Committee

Policy

Contact Us

中文版

Get Citation

Share

Article Metrics

History

Article QR Code