物理学报2011，Vol.60Issue(9)：435-440,6.
界面条件下线型超声相控阵声场特性研究
Acoustic field characteristics of ultrasonic linear phased array for an interface condition
摘要
Abstract
Acoustic field characteristics of an ultrasonic linear phased array are studied under the condition of an interface. The issue about a phased array transducer with a wedge is reasonably simplified into a liquid-solid interface problem. According to ray acoustics theory, the acoustic field produced by a single element on the liquid-solid interface is computed. Then focus laws are derived and the expressions of the sound field and the displacement of the ultrasonic linear array with a liquid-solid interface are obtained. Simulations are carried out for a phased array transducer mounted on a wedge. The focusing-generated effects on axial and horizontal acoustic field of transducer are discussed. It is shown that the focusing can enhance sensitivity and resolution, but degrades the performance of beams beyond the focal region. So focusing should be reasonably used in actual testing.关键词
超声相控阵/界面/声场/聚焦Key words
ultrasonic phased array/interface/acoustic field/focusing分类
矿业与冶金引用本文复制引用
孙芳,曾周末,王晓媛,靳世久,詹湘琳..界面条件下线型超声相控阵声场特性研究[J].物理学报,2011,60(9):435-440,6.基金项目
精密测试技术及仪器国家重点实验室开放基金（批准号：#PIL0903）资助的课题 （）
