近场声聚焦波束形成与波束零陷研究  

Research on near field focus beam-forming and beam null-forming

作　　者：梅继丹 王新勇[2] 惠俊英 王逸林 

机构地区：[1]哈尔滨工程大学水声技术国防科技重点实验室,哈尔滨150001 [2]上海贝尔股份有限公司,上海200000

出　　处：《大连海事大学学报》2009年第3期21-24,共4页Journal of Dalian Maritime University

基　　金：国防预研究基金资助项目(401501040104);哈尔滨工程大学技术研究基金资助项目(HEUST07018)

摘　　要：为分析舰船各部位辐射噪声源分布情况,采用近场聚焦波束扫描声图被动定位法,对测量区内各个位置进行逐点波束扫描,根据各点波束输出功率绘制噪声源的分布图.提出近场波束零陷形成方法,在强辐射声源位置形成波束指向性零点,减少其对其他部位波束扫描的影响.仿真结果表明:该方法提高了对弱声源信号的检测和定位能力,改善了聚焦波束扫描声图质量.To analyze the distribution of ship-radiated noise sources, near field focus beam-forming method was used, which could scan the measured area point-by-point and describe the distribution map of noise sources by the power output of beamforming. A beam null-forming method of near field was given to form a beam zero in which the strong noise sources could be suppressed, and the influences caused by above noise sources in measured area would be less. Simulation results show that the proposed method can improve the quality of the focus beamforming acoustic image and the ability of weak targets detection and location.

关 键 词：近场 聚焦波束形成 波束零陷 被动定位 

分 类 号：TB566[交通运输工程—水声工程]