凸形弧线旋转曲面声透镜研究  

Study of convex revolving arc curved surface lens

作　　者：何家忠[1] 张福成[2] 

机构地区：[1]韶关大学物理系,广东韶关512005 [2]陕西师范大学应用声学研究所,西安710062

出　　处：《声学技术》2001年第2期95-96,共2页Technical Acoustics

摘　　要：通过对凸形弧线旋转曲面声透镜在不同面形参数下的声场的数值计算 ,研究了透镜面形参数与其声场分布特征间的关系 ,证实透镜面形参数对声场分布有明显影响 ,根据在声场中尽可能长的距离范围内 ,获得声束宽度较小 ,旁瓣水平适中的声束的要求 ,提出了透镜的优化面形参数。结果得到实验验证。The acoustic fields of the transducer with a convex revolving arc lens are calculated numerically for various shape parameters,and the relations between the shape parameters of the lens and the acoustic field characteristics are investigated.The optimum shape parameters of the lens are determined to get a narrow acoustic beam width over a longer axial range while the sidelobe level is moderate.The theoretical results are verified with experimental results.

关 键 词：声场 凸形弧线旋转曲面声透镜 聚焦声束 无损检测 

分 类 号：O422.2[理学—声学] TB51[理学—物理]