新型旋转抛物面换能器阵列的设计

针对常见的一维线阵列和二维平面阵存在能量转化率低、成本高和加工精度要求高等问题, 在构建任意三维阵列的指向性函数的基础上, 设计了一种旋转抛物面型换能器阵列。将平面型换能器阵列旋转成抛物面型，利用指向性函数确定旋转抛物面型换能器阵列相应参数的最优值。仿真对比实验及其分析表明, 该新型阵列可以在减少换能器阵元使用数量、增大阵元间距的同时, 改善阵列的指向性, 并能提高声能量转化效率, 使更多的声能集中在主瓣方向。

Design of novel rotary paraboloid transducer array

Aiming at the problems of low energy conversion rate,high cost and high machining accuracy in common one-dimensional linear array and two-dimensional planar array,a rotating paraboloid transducer array is designed based on the construction of directivity function of arbitrary three-dimensional array.The planar transducer array is rotated into a paraboloid type,and the optimal parameters of the rotating paraboloid transducer array are determined by the directivity function.The simulation results show that the new array can not only reduce the number of transducer elements,but also increase the array spacing,improve the directivity of the array,and improve the efficiency of acoustic energy conversion,so that more acoustic energy is concentrated in the direction of the main lobe.