深海海底反射拖船噪声伪目标判别  

False target discrimination of tugboat noise reflected by deep seabed

作　　者：陈新华[1,3] 张龙恩 郑恩明[1,3] 宋春楠 彭一哲 Chen Xinhua;Zhang Long′en;Zheng Enming;Song Chunnan;Peng Yizhe(Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Science and Technology on Advanced Underwater Acoustic Signal Processing,Chinese Academy of Sciences,Beijing 100190,China;Unit 92038 of PLA,Qingdao 266108,China)

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院先进水下信息技术重点实验室,北京100190 [4]中国人民解放军92038部队,青岛266108

出　　处：《仪器仪表学报》2024年第10期272-283,共12页Chinese Journal of Scientific Instrument

摘　　要：被动拖曳线列阵声纳深海环境应用中,针对拖船噪声在非端射方向形成伪目标判别问题,提出了一种深海拖船噪声海底反射伪目标判别方法。首先基于射线理论模型,给出了深海拖船噪声经海底反射形成伪目标的过程机理;然后提取各目标在不同频率波束输出功率的干涉特征;最后依据干涉特征,分析各目标干涉结构的频率间隔,实现伪目标判别。仿真数据和海试数据分析结果表明,该方法在干涉结构稳定,波束域海底反射声能量与背景噪声能量比8 dB以上,对伪目标判决准确性达到95%以上,有效解决了拖船噪声在非端射方向形成的伪目标判别问题,为后续判情提供参考。In the application of passive towed linear array sonar in deep sea environment,aiming at the problem of false target discrimination in the non-end-fire direction of tugboat noise,a method for identifying the false target of seabed reflection of deep-sea tugboat noise is proposed.Firstly,based on the ray theory model,the process mechanism of the deep-sea tug noise reflected by the seabed to form a false target is given.Then,the interference characteristics of beam output power of each target at different frequencies are extracted.Finally,according to the interference characteristics,the frequency intervals of each target interference structure are analyzed to realize the false target discrimination.The analysis results of simulation data and sea trial data show that the accuracy of the false target decision is more than 95%when the interference structure is stable and the energy ratio of the reflected sound energy to the background noise energy in the beam domain is more than 8 dB.It effectively solves the problem of false target discrimination formed by tugboat noise in non-end-fire direction,providing a reference for subsequent target judgment.and provides reference for subsequent judgment.

关 键 词：拖线阵 深海 拖船噪声 干涉结构 目标判决 

分 类 号：TB566[交通运输工程—水声工程] TH89[理学—物理]