摘要
以基于格林函数的近场声全息理论为基础,用模块化结构设计方法组合40路硅咪采集模块、步进电机扫描模块和单片机控制存储模块,制作了近场声全息扫描仪.编写Matlab程序,正向和逆向重构空间不同位置处声波的声压和相位分布.测量单声源的复声压分布,声场全息重构符合实验测量结果.
Based on the Green function theory,the modular structure was used to design a low-cost near-field acoustic holography scanner,which was composed of 40 channels of silicon acquisition module,step motor scanning module and single-chip microcomputer controlled memory module.The acoustic pressure and phase distribution at different positions were reconstructed forwardly and reversely using Matlab programming.The distribution of the complex acoustic pressure of a mono-source was measured,and the results were in accordance with the expectation.
作者
郭佳诚
付湘睿
曹宗正
张帅祥
赵伟
曲广媛
王中平
张增明
GUO Jia-cheng;FU Xiang-rui;CAO Zong-zheng;ZHANG Shuai-xiang;ZHAO Wei;QU Guang-yuan;WANG Zhong-ping;ZHANG Zeng-ming(College of Physics,University of Science and Technology of China,Hefei 230026,China;Physics Experiment Teaching Center, University of Science and Technology of China, Hefei 230026, China)
出处
《物理实验》
2020年第10期28-32,共5页
Physics Experimentation
关键词
近场声全息
傅里叶变换
声压
相位
near-field acoustic holography
Fourier transform
acoustic pressure
phase
