Array gain for a conformal acoustic vector sensor array: An experimental study

Array gain for a conformal acoustic vector sensor array: An experimental study
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共形声矢量传感器阵列的阵列增益:实验研究

DOI:
10.1088/1674-1056/25/12/124318
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发表时间:
2016-11
期刊:
影响因子:
1.7
通讯作者:
Yuanliang Ma
Yuanliang Ma
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Yong Wang;Yixin Yang;Zhengyao He;Bo Lei;Chao Sun;Yuanliang Ma

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声矢量传感器可以同时测量同一点上的质点速度分量和声压分量,相对于全向声压传感器具有更大的阵列增益和更高的角分辨率。本文介绍了在实际环境中共形声矢量传感器阵增益的实验研究。首先,使用真实的测量数据计算流形向量,使得阵列失配的影响可以最小化。其次,基于环境噪声的稳定方向性,设计了具有特定空间响应的最优波束形成器,该波束形成器能够有效地抑制环境噪声。实验结果表明,该波束形成器对共形声矢量传感器阵列具有良好的信噪比增强效果,优于延迟求和波束形成器和最小方差无失真波束形成器。
An acoustic vector sensor can measure the components of particle velocity and the acoustic pressure at the same point simultaneously, which provides a larger array gain against the ambient noise and a higher angular resolution than the omnidirectional pressure sensor. This paper presents an experimental study of array gain for a conformal acoustic vector sensor array in a practical environment. First, the manifold vector is calculated using the real measured data so that the effects of array mismatches can be minimized. Second, an optimal beamformer with a specific spatial response on the basis of the stable directivity of the ambient noise is designed, which can effectively suppress the ambient noise. Experimental results show that this beamformer for the conformal acoustic vector sensor array provides good signal-to-noise ratio enhancement and is more advantageous than the delay-and-sum and minimum variance distortionless response beamformers.
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