Open AccessResolution enhancement of nearfield acoustic holography by the wave superposition approach
Author(s) -
Xiaozheng Zhang,
ChuanXing Bi,
Liukang Xu,
Chen Xinzhao
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.5564
Subject(s) - superposition principle , acoustic holography , holography , interpolation (computer graphics) , optics , acoustics , resolution (logic) , signal (programming language) , physics , image resolution , process (computing) , computer science , image (mathematics) , computer vision , artificial intelligence , programming language , operating system , quantum mechanics
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.