摘要
提出一种新型的多阵元聚焦换能器,该聚焦换能器由6个排列在一个球径为146 mm的凹球面上的透镜式单元换能器组成,透镜曲率半径为112 mm,工作频率为1 MHz。该文应用坐标变换法对该聚焦换能器的复杂声场分布进行了数值计算,并测定了其声功率。研究结果表明:该结构具有较大的聚焦深度、较理想的焦域、可改变的声场能量,工艺简单,成本低廉。
A new type multi-elements focused transducer was presented in this paper. It is composed of six-lens style single-element transducers mounted on a concave sphere of a radius of 146 mm. The lens radius of curvature is 112mm and it is operated at 1 MHz. The complex sound field distribution of the focused transducers was calculated by the coordinate transform method, and the acoustic power was measured. The results show that it has a deeper focal length, an ideal focal region and the changeable ultrasonic power. It is low price and can also be easily realized.
出处
《压电与声光》
CSCD
北大核心
2006年第3期367-369,共3页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(50305011)
江苏省自然科学基金资助项目(BK2003090)
航空科学基金资助项目(04H52058)
关键词
聚焦换能器
声场
声功率
激波
focused transducer
sound field
ultrasonic power
shock wave
