文章摘要
闫向宏.圆台型自聚焦超声压电换能器研究[J].声学技术,2005,(2):125~128
圆台型自聚焦超声压电换能器研究
Self-focusing ultrasonic piezoelectric transducer with a truncated cone shape
投稿时间:2004-06-14  修订日期:2004-09-10
DOI:
中文关键词: 压电换能器  超声  圆台  声场
英文关键词: piezoelectric transducer  ultrasound  truncated cone  acoustic field
基金项目:
作者单位
闫向宏 中国石油大学物理科学与技术学院, 山东 东营, 257061 
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中文摘要:
      对圆台型自聚焦超声压电换能器辐射声场分布进行了数值计算,分析了圆台换能器几何参数小端半径b、大端半径a以及高度h对轴向声场以及焦平面声场分布的影响。结果表明:圆台型自聚焦超声换能器轴向声场为振荡分布,声强平均值较高,存在一组最佳参数对应于最佳的聚焦效果,而径向声场分布比较均匀,焦平面有效半径小,受参数影响较小。
英文摘要:
      Radiated filed from a self-focusing ultrasonic piezoelectric transducer with a truncated cone shape is calculated Influence of the geometric parameters b (radius of the small section),a (radius of the large section),and h (height) on the acoustic field of the axis and the focal plane is discussed The results show that distribution of the axial acoustic field is undulated with relatively high average sound intensity There exists a set of optimal parameters,leading to the best focusing effect with even distribution of transverses acoustic field,a small effective radius of focal plane,and less sensitivity to the choice of geometric parameters.
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