Design of the fiber optic distributed acoustic sensor based on Michelson interferometer and its location application

被引：16
作者：
Sun, C [1 ]
Ansari, F [1 ]
机构：
[1] Univ Illinois, Dept Civil & Mat Engn, Chicago, IL 60607 USA
来源：
OPTICAL ENGINEERING | 2003年 / 42卷 / 10期
基金：
美国国家科学基金会;
关键词：
optical fiber sensor; acoustic sensor; location; Michelson interferometer;
D O I：
10.1117/1.1605417
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A multiplexing method for a fiber optic acoustic sensor is proposed by arranging the working point of Michelson interferometer to improve the temporal resolution of reading the distributed sensor. The slope difference of two series sensors is extracted electrically and is employed to bias the working point. This characteristic is used to separate each sensor from one single data stream by the time difference it takes the acoustic signal to arrive at two sensors. Location application with the verification of the commercial piezoelectric transducer (PZT) proves its efficiency. The stress location is resolved to 5.6 cm at the 54-cm region in one channel. (C) 2003 society of Photo-Optical Instrumentation Engineers.
引用
收藏
页码：2987 / 2993
页数：7
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