采用垂直短阵的水下小目标三维层析成像方法  

Three-dimensional tomography method of underwater small target using vertical array

作　　者：曾赛[1,2] 杜选民 范威[1,2] 张德泽 ZENG Sai;DU Xuanmin;FAN Wei;ZHANG Deze(Shanghai Marine Electronic Equipment Research Institute,Shanghai 201108,China;National key Laboratory of Science and Technology on Underwater Acoustic Antagonizing,Shanghai 201108,China)

机构地区：[1]上海船舶电子设备研究所,上海201108 [2]水声对抗技术重点实验室,上海201108

出　　处：《哈尔滨工程大学学报》2020年第10期1583-1590,共8页Journal of Harbin Engineering University

基　　金：国防预研项目(3020202070102).

摘　　要：针对水下无人航行器搭载合成孔径声呐在不同高度绕目标进行多圈层析测量存在耗时长和运动补偿困难的缺点,本文提出采用垂直短阵绕目标做圆周运动的水下三维层析成像方法。该方法通过垂直短阵在特定高度上绕目标进行一次圆周测量获得多圈层析数据,通过不同高度层析图像融合得到目标三维图像。仿真试验分析了该方法的三维成像性能,水池试验证明了该方法的有效性。采用垂直短阵的水下小目标三维层析成像方法提升了水下小目标三维成像效率,能够得到目标精确的三维图像,对于水下小目标的分类识别具有重要意义。Aiming at the shortcomings of time-consuming and difficult motion compensation for UUV-equipped synthetic aperture sonar in performing multi-circle tomographic measurement around the target at different heights,we propose a three-dimensional tomography method for underwater small targets that uses a short vertical array to circle the target.This method uses a vertical short array to perform a circular measurement around the target at a specific height to obtain multi-circle tomographic data.In the height direction,the minimum variance and distortion-free response high-resolution array processing technology is used,and the tomographic imaging technology is used in the azimuth distance.The tomographic image is coherently fused to obtain a three-dimensional image of a small underwater target.Through simulation experiments,the three-dimensional imaging performance of this method is analyzed.The three-dimensional image of the target is obtained through data processing of the water tank test,which verifies effectiveness of the three-dimensional tomography method of the underwater small target using the vertical short array.The three-dimensional tomographic imaging method of underwater small targets using vertical short arrays improves the three-dimensional imaging efficiency of underwater small targets,and in this way we can obtain accurate three-dimensional images of targets,which is of great significance to the classification and recognition of underwater small targets.

关 键 词：水下小目标 垂直阵 圆合成孔径 主动成像 三维成像 层析 图像融合 试验验证 

分 类 号：TB566[交通运输工程—水声工程]