摘要
为了提高双线阵聚焦波束形成在阵元数少或频率低时的定位精度,文章研究了一种基于反卷积的双线阵聚焦波束形成被动定位方法。首先在测量区内对双线阵接收信号进行球面波补偿,给出噪声源分布的声图信息。然后根据阵型的参数,计算双线阵的指向性函数。最后利用一种适用于移变阵列的二维扩展R-L反卷积算法,对声图波束输出和双线阵的指向性函数做反卷积,求解基于反卷积波束形成的源的分布。该方法旁瓣更低,分辨力更高,有效提高双线阵聚焦波束形成的定位精度和左右舷分辨能力,为后续的减振降噪、噪声检测等工作提供了参考。
In order to improve the positioning accuracy of twin-line array focused beamforming when the number of elements is small or the frequency is low,a passive positioning method for twin-line array based on deconvolved focused beamforming is studied in this paper.In this method,spherical wave compensation is performed on the received signal of the twin-line array in the measurement area,and then the acoustic image of the noise source distribution is given.According to the parameters of the array,the directivity function of the twin-line array is calculated.Finally,a two-dimensional extended R-L deconvolution algorithm suitable for shift-variant array is used to deconvolve the output of the acoustic beam and the directivity function,and the source distribution based on the deconvolved focused beamforming is solved.This method has lower side lobes and higher resolution,which effectively improves the positioning accuracy and the resolution of port/starboard ambiguity and provides a reference for noise and vibration reduction,noise detection and other research work.
作者
马超
梅继丹
陈奕宏
MA Chao;MEI Jidan;CHEN Yihong(China Ship Scientific Research Center,Key Laboratory of Ship Vibration and Noise,Wuxi 214082,Jiangsu,China;Taihu Laboratory of Deep Sea Technological Science,Wuxi 214082,Jiangsu,China;Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,Heilongjiang,China;Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001,Heilongjiang,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China)
出处
《声学技术》
CSCD
北大核心
2024年第2期275-280,共6页
Technical Acoustics
基金
国家自然科学基金(92252205)资助项目。
关键词
反卷积
聚焦波束形成
声源定位
定位精度
deconvolution
focused beamforming
source localization
positioning accuracy
