Open AccessA Signal Processing Algorithm Proposed for OFDR Distributed Sensing System to Enhance Its Performance
Author(s) -
Bingjian Li,
Jiwen Cui,
Xuping Zhang,
Hong Dang,
Xun Sun,
Jun Dong,
Kunpeng Feng
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1237/2/022169
Subject(s) - reflectometry , rayleigh scattering , backscatter (email) , signal (programming language) , optics , range (aeronautics) , algorithm , materials science , computer science , time domain , physics , telecommunications , computer vision , composite material , wireless , programming language
A novel OFDR processing algorithm is proposed to improve the measurable range. The high local similarity found between the reference and measurement Rayleigh scattering spectrum (ReS and MeS). The spectrum shift of the Rayleigh backscatter which is the function of strain is measured using an improved optical frequency-domain reflectometry (OFDR). This method is improved by matching local ReS on MeS rather than a direct cross-correlation between whole ReS and MeS in conventional OFDR methods. By this method, a larger measurable range (0∼3000µε) OFDR method with a high level spatial resolution (3mm gauge) is experimentally achieved comparing to conventional OFDR methods.