一种配置混沌振子的光纤水听器  

A fiber optic hydrophone with chaos

作　　者：孟克[1] 刘鹏 陈辉[1] 任海刚[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2007年第3期335-338,共4页Journal of Harbin Engineering University

摘　　要：在海洋中,海水的流动噪声很大,水听器接收到的被测船体的信号往往是信噪比很低的微弱信号.一般的时域检测系统,可检测的信号的最低信噪比门限难以达到-20dB,并且检测时间较长.介绍一种配置混沌振子的光纤水听器系统,利用混沌振子对被测周期小信号的敏感性和对噪声的免疫力,获取水声信号.与时域检测方法(如多点采样积分方法)相比较,具有更低的最低信噪比门限,和更短的测试时间.At sea, the water flowing noise is strong, so the received ship signal by a hydrophone is often weak, i.e. its signal-noise ratio is low. Generally, for a measurement system working in time domain, its lowest signal-noise threshold cannot be lowed down to -20dB. And the measurement costs much time. A fi- ber-optic hydrophone matched with chaos is introduced. Its sensitivity to weak cycle signal and resistance to noise are used to detect hydro-sound signal. In comparison with traditional measurement method in time domain （e. g. sampling and averaging method）, it has lower signal-noise threshold, as well as shorter measurement time.

关 键 词：水听器 光纤传感器 混沌 

分 类 号：TB96[机械工程—光学工程]