三轴四元非典型声强向量阵对低频声源全空间定向的理论与实验研究

陈韶华; 相敬林; 石杰; 韩鹏

doi:10.3724/SP.J.1146.2005.01302

三轴四元非典型声强向量阵对低频声源全空间定向的理论与实验研究

doi: 10.3724/SP.J.1146.2005.01302

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出版历程
- 收稿日期: 2005-10-17
- 修回日期: 2006-04-19
- 刊出日期: 2007-05-19

Theoretical and Experimental Exploration on Two-Dimensional DOA Estimation for Low Frequency Sound Source with Non-typical Vector Acoustic Intensity Array

摘要

摘要: 该文提出了应用3轴4元非典型声强向量阵在小尺度平台上对低频声源全空间定向的方法。该方法用四只传感器测量声强向量的3个正交分量，根据3个分量的几何关系来解出目标的方位。文中基于声信号的空间互谱分析，给出了声强向量阵的定向原理，并系统分析了其定向误差，包括有限差分误差、通道失配误差和环境噪声引起的误差。半消声室实验结果表明，在校正系统误差后，尺度为0.1m的非典型声强向量阵在各向同性噪声中的定向误差在1o左右，证实了该方法是可行的。
- 声源定向;非典型声强向量阵;误差分析
Abstract: A new method of two-dimensional DOA (Direction of Arrival) estimation for low frequency sound source with the non-typical vector acoustic intensity array of small size is proposed. This array consists of 4 sensors on the 3 orthogonal axes, so as to measure the 3 components of the vector acoustic intensity. The azimuth and pitch angles of the sound source can be estimated from the 3 intensity components. The estimation errors, including the finite difference approximation error (FDAE), the instrumentation channel mismatch error (ICME), and the error caused by ambient noise, are studied systematically. Experiments conducted in semi-anechoic chamber show that, after correcting the FDAE and ICME, the precision of DOA estimation in isotropic ambient noise is about 1o. Both theoretical analysis and experimental results validate the effectiveness of this method.

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Hickling R and Wei W. Use of pitch-azimuth plots in determining the direction of a noise source in water with a vector sound -intensity probe[J].J. Acoust. Soc. Am.1995, 97(2):856-866[2]Hutt D L and Hines P C, et al.. Measurement of underwater sound intensity vector. Proc. OCEANS '99 MTS/IEEE, Seattle, WA, 1999, vol.2: 717-722.[3]Hutt D L, Hines P C, and Young V. Measurement of underwater sound intensity and determination of source bearing angle. J. Acoust. Soc. Am, 2001, 110(5): 2740.[4]Young V W and Hines P C, et al.. Practical application of a tri-axial intensity array. J. Acoust. Soc. Am, 2003, 114(4): 2427.[5]刘勋. 体积目标的被动声定向方法和尺度估计研究.[博士论文]. 西安: 西北工业大学, 2000.[6]刘勋, 相敬林等. 基于声强度向量法的体积目标被动跟踪与尺度估计. 声学学报, 2001, 26(1): 41-50.[7]刘勋, 相敬林等. 基于声强向量法的体积目标定向和缩比实验研究[J].电子与信息学报.2002, 24(3):347-353浏览[8]刘勋, 相敬林等. 基于声强向量法和声压梯度法的水中目标定向. 兵工学报, 2001, 22(1): 90-94. Liu Xun and Xiang Jing-lin, et al.. Determination of bearings of underwater objects based on acoustic intensity and acoustic pressure gradient. Acta Armamentarii, 2001, 22(1): 90-94.[9]陈华伟, 赵浚渭. 基于矢量传感器复声强测量的低空目标二维波达方向估计.声学学报, 2004, 29(3): 277-282.[10]Thompson J K and Tree D R. Finite difference approximation errors in acoustic intensity measurements[J].Journal of Sound and Vibration.1981, 75(2):229-238[11]Burdic W S. Underwater Acoustic System Analysis. New Jerzey: Prentice-Hall Inc., 1991, chap. 10.[12]鄢社峰, 马远良等. 一种海洋宽带噪声场数值模拟方法. 声学技术, 2003, 22(1): 30~32. Yan She-feng and Ma Yuan-liang, et al.. A numerical method for simulating broadband undersea noise field for hydrophone array. Technical Acoustics, 2003, 22(1): 30~32.

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