Ultrasonic field computation in the presence of a scatterer of finite dimension

被引：16

作者：

Placko, D ^{[1
]}

Kundu, T ^{[1
]}

Ahmad, R ^{[1
]}

机构：

[1] Ecole Normale Super, Lab Elect Signaux & Robot, F-94235 Cachan, France

来源：

SMART NONDESTRUCTIVE EVALUATION AND HEALTH MONITORING OF STRUCTURAL AND BIOLOGICAL SYSTEMS II | 2003年 / 5047卷

关键词：

ultrasonic acoustic sensor; point source; pressure wave; numerical technique; scatterer; ultrasonic field;

D O I：

10.1117/12.483801

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

A recently developed semi-analytical technique called DPSM (Distributed Point Source Method) is improved and used to model the ultrasonic field in a fluid generated by an ultrasonic transducer and scattered by a solid plate of finite dimension. Earlier works on the ultrasonic field modeling by the DPSM technique have been limited to homogeneous fluids or non-homogeneous media with infinite interfaces. This is the first attempt to model the complete ultrasonic field consisting of incident, reflected, transmitted and diffracted fields by a finite scatterer of any shape or size. No closed form analytical solution exists for ultrasonic field computation in presence of a scatterer and an ultrasonic transducer, both of which can have finite dimensions and any shape. Finite element solution for wave propagation analysis is very time consuming; therefore, the semi analytical technique used here appears to be the method of choice for solving such practical problems. The paper shows how the scattered field varies as the striking angle and dimensions of the scatterer change.

引用

页码：169 / 179

页数：11