The detection of multiple acoustic disturbances by optical fiber is a hot research topic in the field
of optical fiber sensing. This paper considers adopting an optical distributed acoustic sensing (DAS) system to
detect multiple acoustic disturbances, proposes a new approach to processing the DAS signal based on time-space
average in frequency domain, and overcomes the randomness of DAS time domain signal. Finally, it obtains a
functional model of single-frequency (50—1 000 Hz) sound pressure level and DAS signal intensity, and also the
cut-off frequency of acoustic disturbance is detected by DAS system.
ZHANG Yang (张洋), XU Hongxuan (徐弘萱), ZHU Xianxun (朱贤训), ZHAO Zhiyang (赵之阳), ZUO Jiancun (左健存)
. Detection and Quantization Technique of Optical Distributed Acoustic Coupling Based on φ-OTDR[J]. Journal of Shanghai Jiaotong University(Science), 2020
, 25(2)
: 208
-213
.
DOI: 10.1007/s12204-020-2161-8
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