基于光纤碟型加速度传感单元的三维柱形矢量水听器  

A Three-Dimentional Vector Hydrophone Based on Fiber-Optic Flexural Disk Accelerometer

作　　者：金梦群 张自丽[1] 吴国军[1] 葛辉良[1] 

机构地区：[1]杭州应用声学研究所,浙江杭州310023

出　　处：《中国激光》2015年第3期166-172,共7页Chinese Journal of Lasers

摘　　要：光纤矢量水听器(FOVH)以其低频灵敏度高,动态范围大,抗电磁干扰,易轻型化等诸多优势,成为新型矢量水听器的一个发展热点。针对线阵列应用,开展了光纤干涉碟型矢量水听器的仿真分析和研制工作。有限元分析采用光纤等效层方法(FLEM)和光纤细化结构方法(FLDM)分别对系统的性能进行预报,研制出了光纤碟型矢量水听器样品,并进行了全面的测试。实验结果表明,所研制的矢量水听器样品在100~1000 Hz的工作频带内,矢量通道的等效声压相移灵敏度为-182 d B@100 Hz^-158.5 d B@1000 Hz(ref.1 rad/μPa),串扰小于-30 d B,有良好的矢量性。Fiber- optic vector hydrophone（FOVH）, with many advantages including high sensitivity, large dynamic range, intrinsic immunity to electromagnetic interference and light weight, is becoming a hotspot of new-style vector sensors. For array applications, finite element methods and experimental results of the fiberoptical flexural disk vector hydrophone are discussed（FOVH）. Two finite element analysis methods are presented to forecast the performance, fiber-layer equivalent method（FLEM） and fiber-layer division method（FLDM）, then a fiber- optic flexural disk vector hydrophone is developed and related metrology aspects of measurement is demonstrated. The experimental results are presented that pressure phase sensitivity of the hydrophone is-182 d B@100 Hz^-158.5 d B@1000 Hz（ref.1 rad/μPa） at the range from 100 Hz to 1000 Hz. The cross-sensitivity is less than-30 d B. It possesses a good directional performance.

关 键 词：光纤光学 光纤矢量水听器 有限元分析 光纤等效层方法 光纤细化结构方法 声压相移灵敏度 

分 类 号：TN253[电子电信—物理电子学]