带凹槽平板型声透镜聚焦性能的理论分析与数值模拟

Theoretical analysis and numerical simulation on the performance of a flat-type acoustic lens with fluted rings

基于相位补偿和惠更斯-菲涅尔原理,利用理论分析和数值模拟的方法,研究了一种带凹槽的平板型声透镜,讨论了凹槽个数、声透镜材料等参数对声透镜聚焦性能的影响。结果表明:优化后的菲涅尔声透镜聚声效率理论上可达40%,放大倍数约为7倍,是一种较为高效、成本低廉的新型声透镜。

Based on phase compensation and Huygens-Fresnel principle, a flat-type acoustic lens with fluted rings is proposed and researched by using theoretical analysis and numerical simulation. The influences of various factors such as the number of grooves and the materials during the manufacturing process on the performances of the lens are discussed. The results show that the efficiency of the optimized Fresnel lens can be up to 40% with a magnification of about seven times, making it a potential candidate of high efficiency and low-cost acoustic lens.