拖线阵信号传输的干扰抑制方法研究  

Research on Interference Suppression Method for Signal Transmission of the Towed Array

作　　者：王帅 庄飞 陈小星 Wang Shuai;Zhuang Fei;Chen Xiaoxing(The 715th Research Institute of CSSC,Hangzhou 310012,China)

机构地区：[1]中国船舶集团第七一五研究所,杭州310012

出　　处：《机电工程技术》2023年第7期255-258,267,共5页Mechanical & Electrical Engineering Technology

摘　　要：拖线阵具有孔径大、集成化程度高、受本舰噪声干扰小和适装性强等特点,在军用和民用行业均得到广泛的应用。电噪声水平和抗干扰能力是拖线阵的重要性能指标,高的电噪声和周围的电磁干扰会使目标声源淹没在背景噪声中,大大削弱拖线阵的目标探测能力,因此提升拖线阵信号传输的抗干扰能力非常必要。针对引起拖线阵中噪声的干扰源进行了识别,对屏蔽和接地的方式进行了理论分析和对比,发现屏蔽并采用单端接地可以改变感生电流的流经路径,使干扰电流经屏蔽层短路入地,从而减小电磁感应的面积,对电磁干扰起到抑制作用。通过试验对抗干扰效果进行了验证,结果表明,拖线阵信号传输采用屏蔽防护并采用单端接地能够有效抑制空间的电磁场对传输线的影响,减小拖线阵内部高压电流对前置电路的干扰,提升拖线阵的工作性能;另一方面可以减小对周围电磁环境的污染,降低电缆内高压信号对其外部微弱信号的电磁辐射。本文对抑制空间电磁场对内部微弱信号的影响提供了技术参考,也对拖线阵的设计工作有一定的参考意义。The towed line array are widely used because of its large aperture,high degree of integration,low noise interference from mother ship and strong fitness for equipment.Electrical noise level and anti-interference ability are the important index for the towed line array.The electrical noise and surrounding electromagnetic interference will make the target sound source submerged in the background noise,which will greatly weaken the target detection ability of the towed line array.So it is necessary to improve the anti-interference ability of the towed line array signal transmission.In this paper,the interference source that causes the electrical noise are identified,and the shielding and grounding modes are analyzed and compared theoretically.It is found that shielding and single-terminal grounding can change the induced current flow path and make the interference current flow through the shielding layer short circuit into the ground,thus reducing the electromagnetic induction area and inhibiting the electromagnetic interference.The results show that the shield protection and single-terminal grounding can effectively suppress the influence of spatial electromagnetic field on the transmission line,and reduce the interference of the high voltage current and improve the performance of the towed line array.On the other hand,it can also reduce the influence of the surrounding electromagnetic environment and reduce the electromagnetic radiation of the high-voltage signal inside the cable to the weak signal outside.This paper provides a technical reference for suppressing the influence of space electromagnetic field on internal weak signals,and also has a certain reference significance for the design of the towed line array.

关 键 词：拖线阵 干扰 屏蔽 接地 

分 类 号：TB53[理学—物理]