摘要
从单个矩形压电晶片的辐射声场表达式出发,定性分析了主要因素对声压强度及指向性的影响,提出了最小化主瓣及抑制栅瓣的具体方法。以16晶片相控阵探头为例,推导了叠加声场的表达式,分析了合成声压与焦点和换能器距离的关系。仿真并讨论相控阵探头晶片单元个数、晶片间距等因素对合成声束质量的影响,仿真结果与理论分析相吻合,为矩形相控阵探头声场评价及高性能相控阵探头的制作提供了参考。
Based on radiant sound field expression for single rectangular piezoelectric wafer, this paper gives analysis the infection each factor causing to sound pressure intensity and direetivity, concrete methods to minimize major lobe while narrowing side lobes is put forward. As an example, the paper derives superimposed sound field formula for 16- wafer phased array probe, analyzes relationship of superimposed sound pressure and distance between focus and transducer, simulates and discusses influence on the quality of synthetic sound beam of phased array probe by factors such as element number, distance of adjacent elements. Simulation result is considerably consistent to related theory,which provides reference for evaluation and measurement for sound distribution and production of high-quality phased array probes.
出处
《压电与声光》
CSCD
北大核心
2012年第4期565-570,共6页
Piezoelectrics & Acoustooptics
关键词
相控阵聚焦
压电晶片
远场区域
声压分布
声束主瓣
指向性
phased array focusing
piezoelectric wafer
far-field district
sound pressure distribution
major lobe of sound beam
directivity
作者简介
作者简介：宋志明（1988-），男，陕西宝鸡人，硕士生，主要从事图像处理和无损检测方面的研究。
王黎，男，教授，博士生导师，主要从事铁路安全无损检测方面的研究。
