摘要
提出一种基于波叠加法的近场声全息空间分辨率增强方法.该方法在波叠加法的基础上,利用全息面声压信号求得布置在全息面附近的虚源面上的简单源源强,再根据求得的简单源源强实现对全息面声压的插值,进而利用插值后的全息面声压数据进行重建.该方法可以提高近场声全息重建图像的空间分辨率,减少测量工作量,简化测量过程.通过仿真对影响插值结果的参数进行了分析,给出了合理的选取范围;通过仿真和实验研究验证了该方法的有效性.
By the wave superposition approach a method of enhancing the spatial resolution of the nearfield acoustic holography is proposed. According to wave superposition approach,the source strengths of fictitious sources placed on the fictitious surface which is near the hologram surface are obtained by measuring the hologram pressure signal,then these fictitious sources are used to realize the interpolation of acoustic pressure, finally, the reconstruction can be done by the interpolated hologram pressure. By this method the spatial resolution of the reconstructed image can be improved,the measurement workload is reduced,and the measurement process is simplified. The parameters affecting the interpolated result are reasonably chosen by numerical simulations and the availability of this method is proved by numerical simulations and experimental resuets.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第8期5564-5571,共8页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10974040
10874037)
霍英东教育基金(批准号:111058)
教育部新世纪优秀人才支持计划(批准号:NCET-08-0767)资助的课题~~
关键词
波叠加法
近场声全息
空间分辨率
wave superposition approach
nearfield acoustic holography
spatial resolution
