| 摘要: |
| 为解决现有线形一阶差分波束形成器主瓣无法随运动目标方向改变的问题，提出一种线形声矢量阵一阶可调向差分波束形成器设计方法。首先，根据均匀线形阵列接收信号模型，从理论上推导了信号模型和性能评价公式，给出了波束图和指向性定义。然后，将各通道权值与各通道的导向矢量的和基于McLaughlin级数展开，与可调向差分波束形成器表达式对照，得到各通道权值表达式。仿真实验表明，相较于一阶差分麦克风阵列，该算法指向性更优越且几乎不随频率而变化。水池实验结果表明，相较于传统的声压传感器，该算法处理后的阵列增益为9 dB，更加有利于水下探测。 |
| 关键词: 水下探测 线形声学矢量传感器阵列 差分波束形成器 指向调节 |
| DOI：10.20079/j.issn.1001-893x.240129001 |
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| 基金项目:国家自然科学基金资助项目(62301179)；中国博士后科学基金面上资助项目(2023M730828)；黑龙江省自然科学基金优青项目(YQ2023D008)；黑龙江省博士后基金(LBH-Z22103,LBH-TZ2309) |
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| First-order Steerable Differential Beamformer Based onLinear Acoustic Vector Sensors Array |
| ZHANG Jingdan,WU Yi,CHEN Feng,HUANG Xingyu |
| (a.Future Technology College;b.College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China) |
| Abstract: |
| To address the issue that the main lobe of the linear first-order differential beamformers is unable to adapt to the moving target,a design method for a linear acoustic vector array first-order steerable differential beamformer is proposed.Firstly,the signal model and performance evaluation formula are derived based on the receiving signal model of a uniform linear array.Additionally,the beampattern and maximum directivity factor(DF)are defined.Finally,the sum of the channel weights and the propagation vectors of each channel are expanded based on McLaughlin搒 series,which is compared with the expression of the steerable differential beamformer,and then the channel weights are obtained.The simulation results demonstrate that,in comparison with the first-order differential microphone array,the algorithm exhibits superior directivity that almost remains consistent across frequencies.The experimental result in a pool illustrates that,in comparison with traditional acoustic pressure sensors,the array amplification after processing with the algorithm increases by 9 dB.This method is more conducive to underwater detection. |
| Key words: underwater detection linear acoustic vector array differential beamformers beam steering |
