换能器阵列形式对指向性的影响  

Effect of Transducer's Array Pattern on Array's Directivity

作　　者：杨天文[1] 陈敏[2] 黄大贵[1] 张力文[2] 陈祥[2] 

机构地区：[1]电子科技大学机械电子工程学院,四川成都611731 [2]电子科技大学航空航天学院,四川成都611731

出　　处：《压电与声光》2014年第1期93-96,99,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(60901062;61271286)

摘　　要：针对声波定向换能器阵列形式对指向性的影响问题,该文根据声波叠加原理,从理论上推导了圆形活塞换能器阵的三维指向性计算公式。在此基础上,利用该理论公式,对24个压电换能器阵元分别布为4×6阵列、5×5-1阵列、3×8阵列、2×12阵列的指向性进行了分析,发现不同阵列形式三维指向性存在明显差异;方阵在各方向上指向性近似相同,而长方形阵则随长宽比的增大,在长、宽方向上的指向性差异增大。A three-dimension directivity calculating formula for circular piston transducer array is deduced theoretically according to the acoustic wave superposition principle to reveal how acoustic directional transducer array pattern affects the array directivity.The directivity of a 4 × 6 array,5 × 5-1 array,3 × 8 array and 2 × 12 array,which are all composed of 24 piezoelectric transducer array element,are analyzed by the theoretical formula,and the results show that there are significant differences existing in different arrays.The directivity of the square transducer array in various directions is approximately equal,while the difference of the directivity of the rectangular transducer array in length direction and width direction increases when the ratio of length and width increases.

关 键 词：声波定向换能器阵列 阵列形式 指向性 圆形活塞换能器 矩形阵 三维指向性设计 

分 类 号：TN912[电子电信—通信与信息系统]