基于主动式时间反转镜的声呐目标强度测量研究  

Sonar target strength measurements using time reversal mirror

作　　者：赵安邦 何呈[1,2] 惠娟 牛芳[1,2] 

机构地区：[1]哈尔滨工程大学水声技术重点实验室,哈尔滨150001 [2]哈尔滨工程大学水声工程学院,哈尔滨150001

出　　处：《应用声学》2015年第1期79-84,共6页Journal of Applied Acoustics

基　　金：国家自然科学基金(11374072;61371171);国家自然科学基金青年科学(51009041);公益性行业(海洋)科研专项基金(gz201005001)

摘　　要：为提高目标强度测量过程中的抗噪声、混响以及浅海多途干扰性能,从军标文件中的目标强度测量方法以及主动式时间反转镜的基本原理出发,经过研究和推演,发现可将基于单阵元的主动式时间反转镜与相关器结合应用于目标强度测量过程,提出了一种新的目标强度测量方法。该方法利用了主动式时间反转镜的抗多途特性,使得测量具有抗多途的性能;利用噪声与信号的不相关特性,算法结合相关器起到了很好的抗随机噪声效果;混响中的体积混响是随机的,算法具有抗体积混响的性能。论文分别从理论仿真和水池实验验证了算法的有效性和正确性。In order to improve the anti-noise, reverberation and shallow multipath interference performance of target strength measurement, it＇s found that a single element array based on active time reversal mirror technology and correlator can be used in target strength measurement process after the deduction and research of an army standard file about target strength measurement methods and basic principles of active time reversal mirror. Then, a new target strength measurement method is proposed. The method has the performance of anti- multipath by utilizing the multi-path focus characteristics of active anti-time-reversal mirror. The algorithm is able to play a very good performance of relevant anti-random noise effects by utilizing in noise and signal characteristics not related. The algorithm has anti volume reverberation performance because of the random of volume reverberation. The validity and correctness of this algorithm have been confirmed by the theoretical simulation and pool experiment.

关 键 词：时间反转镜 目标强度测量 应答器 抗干扰 

分 类 号：TB56[交通运输工程—水声工程]