NEMS矢量水听器的海上实验研究  

The ocean experimental study of the NEMS vector hydrophone

作　　者：刘宏[1] 刘慧敏[2] 张国军[1] 葛晓洋[1] 薛南[1] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051 [2]北京航天控制仪器研究所,北京100854

出　　处：《舰船科学技术》2013年第8期38-40,45,共4页Ship Science and Technology

基　　金：国家863项目(2011AA040404);国家自然科学基金资助项目(61127008;51205374)

摘　　要：NEMS矢量水听器是可以接收来自水下二维空间声音信号的一种新型仿生结构。在室内研究的基础上进行海上实验,对单个NEMS矢量水听器采集的船辐射噪声进行处理。结果表明,单个NEMS矢量水听器能够在真实的海洋环境中对运动的目标进行航迹跟踪;利用CZT方法能够对海上运动目标进行特征线谱分析,提高了在局部频段内的分辨能力,频率分辨力可达0.32 Hz。The NEMS vector hydrophone is a novel bionic-type structure that could detect the two- dimensional underwater acoustic signal. This hydrophone was done the ocean experiment based on the laboratory experimental study. Radiated noise of ships collected by the single NEMS vector hydrophone had been processed. The results were described as following. Firstly, the single NEMS vector hydrophone can track the moving target in the marine environment. Secondly, the method of the CZT can be applied to extract the line spectrum of the moving targets and improved the resolving power in the local spectrum, and the spectral resolution can be up to 0.32 Hz.

关 键 词：NEMS矢量水听器 辐射噪声 线谱提取 方位历程 

分 类 号：TB535[理学—物理]