Low-frequency beamforming for a miniaturized aperture three-by-three uniform rectangular array of acoustic vector sensors.
Low-frequency beamforming for a miniaturized aperture three-by-three uniform rectangular array of acoustic vector sensors.
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DOI：
10.1121/1.4937759
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
Xijing Guo;Shie Yang;S. Miron
中科院分区：
文献类型：
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作者：
Xijing Guo;Shie Yang;S. Miron
提出了一种适用于3 × 3均匀矩形二维矢量传感器阵列的模式域波束形成方法，该阵列的传感器间距远小于工作频带内的波长。根据泰勒级数多极子的源-汇图，从粒子速度观测中提取声学模式[Wikswo和Swinney，J.Appl.Phys.56（11），3039-3049（1984）]。然后，类似于其他模式域方法，模式被合成以获得期望的波束方向图。所提出的方法是有限的情况下，五是模式的最大顺序的图案合成，这意味着在2D各向同性噪声的情况下的方向性指数可以达到10.4 dB。现场试验验证了该方法的有效性。
This paper proposes a mode domain beamforming method for a 3 × 3 uniform rectangular array of two-dimensional (2D) acoustic vector sensors with inter-sensor spacing much smaller than the wavelengths in the working frequency band. The acoustic modes are extracted from the particle velocity observations in light of the source-sink pictures of the Taylor's series multipoles [Wikswo and Swinney, J. Appl. Phys. 56(11), 3039-3049 (1984)]. Then, similar to other mode domain methods, the modes are synthesized to obtain the desired beam pattern. The proposed method is limited to the cases where five is the maximum order of the modes for pattern synthesis, meaning that the directivity index in the 2D isotropic noise case can reach up to 10.4 dB. The proposed method has been validated by field experiments.