Open AccessUnderwater acoustic source localization based on phase-sensitive optical time domain reflectometry
Author(s) -
Zhichao Liu,
Liang Zhang,
Heming Wei,
Zhelan Xiao,
Zenghuan Qiu,
Ruoqi Sun,
Huanhuan Liu,
Tingyun Wang
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.422255
Subject(s) - reflectometry , underwater , acoustics , optics , distributed acoustic sensing , time domain , optical time domain reflectometer , multilateration , acoustic source localization , computer science , phase (matter) , acoustic wave , optical fiber , physics , fiber optic sensor , geology , fiber optic splitter , oceanography , quantum mechanics , computer vision , node (physics)
This paper demonstrates an underwater localization system based on an improved phase-sensitive optical time domain reflectometry (φ-OTDR). To localize the underwater acoustic source, 3D-printed materials with relatively high Poisson's ratio and low elastic modulus are wrapped by single-mode optical fibers to serve as an L-shaped planar sensing array, yielding a high-fidelity retrieval of acoustic wave signals. Based on the time difference of arrival (TDOA) algorithm, the time delay of signals detected by multiple sensing elements is used to locate the underwater acoustic source. Consequently, the three-dimensional localization feasibility of the proposed system is experimentally verified, showing a measurement error of about 2% in the localization range. It indicates that the proposed scheme is of great potential for applications in the underwater environment, such as trajectory tracking, oil/gas pipeline security monitoring and coastal defense.