声阵列超指向性形成及数值分析
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摘要
首先对超指向性的形成进行了分析,得出了声阵列的最大信噪比超指向性的一般数学模型。然后对声阵列的超指向性的数值模拟仿真进行了研究。利用指向性图分别从阵列形状、阵元数目以及阵列孔径上对规则阵列中的矩形阵列和圆形阵列以及非规则阵列中的阿基米德螺旋阵列和对数螺旋阵列进行了指向性分析与比较,同时,经研究提出了规则传声器阵列在运动声源测试及应用中的不足之处,并给出了一种随机生成的随机阵列的方法,并经过仿真和实验测试证明此方法能够获得超指向性良好的阵列,实现了利用有限的传声器数量来得到最佳的指向性效果。
In this paper,the formation of super-directivity is analyzed,and the general mathematical model of the maximum signal-to-noise ratio of the acoustic array is obtained. Then the numerical simulation of super-directivity of acoustic array is studied. Using the directivity graphs,the rectangular array and the circular array in the regular array and the Archimedes spiral array and the logarithmic helical array in the irregular array are analyzed from the array shape,the number of elements and the array aperture respectively. In this paper,the paper puts forward the shortcomings of the regular microphone array in the motion sound source test and application,and gives a randomly generated random array method,and through simulation and experimental tests to prove that this method can be obtained Ultra-directional good array,to achieve the use of limited number of microphones to get the best directional effect.
In this paper,the formation of super-directivity is analyzed,and the general mathematical model of the maximum signal-to-noise ratio of the acoustic array is obtained. Then the numerical simulation of super-directivity of acoustic array is studied. Using the directivity graphs,the rectangular array and the circular array in the regular array and the Archimedes spiral array and the logarithmic helical array in the irregular array are analyzed from the array shape,the number of elements and the array aperture respectively. In this paper,the paper puts forward the shortcomings of the regular microphone array in the motion sound source test and application,and gives a randomly generated random array method,and through simulation and experimental tests to prove that this method can be obtained Ultra-directional good array,to achieve the use of limited number of microphones to get the best directional effect.
引文
[1]王雁.运动声源定位的随机传声器阵列结构生成方法及其实验研究[D].青岛:青岛理工大学,2013(19):53.(Wang Yan.Motion sound source location of the random microphone array structure generation method and its experimental study[D].Qingdao:Qingdao University of Technology,2013(19):53.)
[2]吴波波.基于传声器阵列的匀速运动声源识别与声场可视化研究[D].青岛:青岛理工大学,2014.(Wu Bo-bo.Based on the microphone array of uniform motion sound source identification and sound field visualization[D].Qingdao:Qingdao University of Technology,2014.)
[3]刘志红,仪垂杰.旋转运动声辐射的解析方法[J].机械设计与制造,2015(12):65-68.(Liu Zhi-hong,Yi Chui-jie.The analytic method for calculating sound radiation from rotating sources[J].Machinery Design&Manufacture,2015(12):65-68.)
[4]刘志红.声辐射预估理论及其应用研究[D].青岛:青岛理工大学,2010(1):93.(Liu Zhi-hong.Sound radiation prediction theory and its application[D].Qingdao:Qingdao University of Technology,2010(1):93.)
[5]孙运强,李再庭.声阵列指向性函数计算[J].测试技术学报,1996,10(2,3):719-724.(Sun Yun-qiang,Li Hou-ting.Study on the directivity function of acoustic array[J].Journal of Testing Technology,1996,10(2,3):719-724.)
[6]刘可辉,王晓蕊,张卫国.红外点目标成像信噪比建模分析[J].红外与激光工程,2014(7):2143-2147.(Liu Ke-hui,Wang Xiao-rui,Zhang Wei-guo.Modeling of infrared point target imaging signal to noise ratio[J].Infrared and Laser Engineering,2014(7):2143-2147.)
[2]吴波波.基于传声器阵列的匀速运动声源识别与声场可视化研究[D].青岛:青岛理工大学,2014.(Wu Bo-bo.Based on the microphone array of uniform motion sound source identification and sound field visualization[D].Qingdao:Qingdao University of Technology,2014.)
[3]刘志红,仪垂杰.旋转运动声辐射的解析方法[J].机械设计与制造,2015(12):65-68.(Liu Zhi-hong,Yi Chui-jie.The analytic method for calculating sound radiation from rotating sources[J].Machinery Design&Manufacture,2015(12):65-68.)
[4]刘志红.声辐射预估理论及其应用研究[D].青岛:青岛理工大学,2010(1):93.(Liu Zhi-hong.Sound radiation prediction theory and its application[D].Qingdao:Qingdao University of Technology,2010(1):93.)
[5]孙运强,李再庭.声阵列指向性函数计算[J].测试技术学报,1996,10(2,3):719-724.(Sun Yun-qiang,Li Hou-ting.Study on the directivity function of acoustic array[J].Journal of Testing Technology,1996,10(2,3):719-724.)
[6]刘可辉,王晓蕊,张卫国.红外点目标成像信噪比建模分析[J].红外与激光工程,2014(7):2143-2147.(Liu Ke-hui,Wang Xiao-rui,Zhang Wei-guo.Modeling of infrared point target imaging signal to noise ratio[J].Infrared and Laser Engineering,2014(7):2143-2147.)