基于十字型阵列的多频发射波束形成算法

发布时间：2018-06-14 23:13

本文选题：实时三维声学成像 + 多频发射　；参考：《华南理工大学学报(自然科学版)》2016年01期

【摘要】：针对平面接收阵阵元数量庞大导致的水下三维声学成像系统硬件开销和计算量过大的问题,提出了一种基于十字型阵列的三维声学成像的多频发射波束形成算法.该算法将发射波束方向划分为多个扇面,在每个扇面内依次向各波束方向发射不同频率的扇形波束信号,将发射次数从波束数减少到扇面数,从而缩短了扫描时间.仿真实验和计算量分析表明,文中算法能够获得与平面接收阵直接波束形成算法相同的波束性能,并且大幅降低了阵元数量和计算量.实际水下试验证明了该算法能够满足水下三维声学成像的实时性需求.
[Abstract]:A multi-frequency beamforming algorithm for 3D acoustic imaging based on cross array is proposed to solve the problem that the hardware overhead and computation of underwater 3D acoustic imaging system is too large due to the large number of received array elements. In this algorithm, the transmitting beam direction is divided into several sectors, and the sector beam signals with different frequencies are transmitted to each sector in turn. The number of transmit beams is reduced from the number of beams to the number of sectors, thus the scanning time is shortened. Simulation experiments and computational analysis show that the proposed algorithm can achieve the same beamforming performance as the planar direct beamforming algorithm, and greatly reduces the number of elements and the amount of computation. Actual underwater experiments show that the algorithm can meet the real-time requirement of underwater three-dimensional acoustic imaging.
【作者单位】：浙江大学数字技术及仪器研究所∥浙江省网络多媒体技术研究重点实验室;
【基金】：国家自然科学基金面上项目(41276090) 国家“863”计划项目(2014AA091301) 浙江大学中央高校基本科研业务费专项资金资助项目~~
【分类号】：TB565

【相似文献】