水下微弱目标双通道激光探测方法研究  

Research on dual-channel laser detection method for underwater weak target

作　　者：张鑫 宗思光[1] 余扬[2] 梁善永[1] 段子科 ZHANG Xin;ZONG Si-guang;YU Yang;LIANG Shan-yong;DUAN Zi-ke(Naval University of Engineering,Wuhan 430034,China;Wuhan University,Wuhan 430070,China)

机构地区：[1]海军工程大学电子工程学院,湖北武汉430034 [2]武汉大学,湖北武汉430070

出　　处：《激光与红外》2023年第2期185-193,共9页Laser & Infrared

基　　金：国家国防基金项目(No.2019-JCJQ-JJ-056)资助。

摘　　要：在舰船尾流、渔网等微弱目标探测方面,由于目标对探测激光反射回波微弱以及水体背景的强干扰,导致激光探测系统的探测距离近、探测视场小及目标检测能力弱。论文针对近岸浑浊水体激光探测回波信噪比低、目标探测距离近问题,基于积分雷达方程,针对舰船尾流、渔网等微弱目标,仿真研究了激光接收天线长度,轴距对接收能量的影响,设计了激光发射、接收非同轴探测方案,并进行舰船尾流、渔网等目标探测实验,实验结果表明:通过双通道光学接收系统的空间合成,可抑制近程水体强散射的干扰,可实现对激光探测系统大视场接收、光电探测器高灵敏度接收、目标远距离探测的匹配。论文研究成果可为水下激光探测技术工程化提供支持。In ship wake, fishing net and other weak targets detection, due to the weak reflection of the target to the detection of laser echoes and the strong interference of the water background, resulting in the detection distance of the laser detection system, the detection field of view is small and the target detection capability is weak.In this paper, aiming at the problems of low signal-to-noise ratio of laser detection echo and short target detection distance in coastal turbid water, based on the integral radar equation, the influence of the length of laser receiving antenna and wheelbase on the received energy is simulated and studied for weak targets such as ship wake and fishing net.A non-coaxial detection scheme for laser transmitting and receiving is designed and the target detection experiments of ship wake and fishing nets are conducted.The experimental results show that the spatial synthesis of the dual-channel optical receiving system can suppress the interference of strong scattering from near-range water body, and can achieve the matching of large field of view reception of laser detection system, high sensitivity reception of photodetector and long-range detection of target.The research results of this paper can provide support for the engineering of underwater laser detection technology.

关 键 词：积分雷达方程 激光探测 微弱目标 系统研究 

分 类 号：TN249[电子电信—物理电子学]