Experimental Investigation of Ultrasound Wave Focusing in Attenuative Solids

被引：9
作者：
Ganguli, Abhijit [1 ]
Gao, Robert X. [2 ]
Liang, K. [3 ]
Jundt, J. [3 ]
Ordonez, Andres [4 ]
机构：
[1] Northeastern Univ, Dept Civil & Environm Engn, Boston, MA 02115 USA
[2] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA
[3] Schlumberger Doll Res Ctr, Cambridge, MA 02139 USA
[4] Syntheon LLC, Miami, FL 33155 USA
来源：
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2010年 / 59卷 / 09期
关键词：
Attenuative solids; time-delayed method; time-reversal method; transducer array; ultrasound focusing; PHASE-ABERRATION CORRECTION; TIME-REVERSAL; DIFFUSE SCATTERERS; POINT REFLECTORS; BASIC PRINCIPLES; IMAGING-SYSTEM; ARRAY; MEDIA; SIGNALS; FIELDS;
D O I：
10.1109/TIM.2009.2034585
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents an experimental study on ultrasonic focusing in an attenuative solid made of cement mortar. The objective is to comparatively investigate the performance of various techniques for wave focusing. Standard attenuation measurements are performed on small cement mortar samples to generate a preliminary idea about the loss in the material. Subsequently, focusing experiments are conducted on a larger mortar block fabricated with the same mix design parameters. The time-delayed and time-reversal methods are employed to perform focusing. A synthetic aperture approach is used to generate the unfocused and focused fields. The time-reversal focusing method generates a narrower focal spot in comparison to the time-delayed method, indicating better focusing action. The experimental results are also compared with an analytical model of focusing in an attenuative fluid with an array of point sources, and a good agreement is confirmed.
引用
收藏
页码：2261 / 2271
页数：11
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