Evaluating Image Precision of Acoustical Imaging Diffractionby Focused Ultrasound Beam

Sensors & Transducers

Dewen ZHENG¹  Qichen MA²  Jinwen DING³  Junhua CHEN³  Han DING⁴  Jingjing LIU⁵  Kang LI⁶  Guochao HE⁷ 

[1] Department of Materials Science and Engineering;Anhui Academy of Coal Science, 81 Xuancheng Road, Hefei, 230001, China;CAS Key Laboratory of Materials for Energy Conversion;Research Institute of Petroleum Exploration and Development, Donghuan Road, Langfang, 065006, China ;School of Computer Science and Technology, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, China ;School of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, 6 Xuefu Middle Road, Xi’an, 710021, China ;School of the Gifted Young;

关键词: Transducer;    Acoustic lens;    Scattering and diffraction;    Time-of-flight (TOF);    Signal aberration;    Acoustical imaging;    Scanning acoustic microscopy;    Non-destructive testing / evaluation (NDT/E).;   

DOI  :  

来源: DOAJ

【 摘 要 】

The paper concisely reveals an acoustic behavior - acoustic diffraction (scattering) phenomena, which arises between a spherical cavity of acoustic lens and the microstructure of an object in immersion. As the result, this phenomena cause some negative influence on acoustical imaging precision. As a certain condition is satisfied, the outline of microstructure in acoustic images become blurred, the image precision is somewhat corroded. The paper introduces a brief evaluation approach to this acoustic interaction, and provides some typical characteristics of this acoustic interaction in two-dimensional (2D) and three-dimensional (3D) acoustical images. The paper suggests the researcher should take into account this interaction behavior - diffraction, to avoid any misrepresentation as investigating microstructures and imaging characterization, promoting the accuracy for materials characterization through the acoustical images by scanning acoustic microscopy technology (SAM), in the application field of non-destructive Testing / Evaluation (NDT/E).

【 授权许可】

Unknown