摘要
基于激光水下爆炸的声探测技术,设计了激光声水下目标探测器。对激光水下爆炸声源的产生机理进行研究,并开展水下探测器发射声信号检测的实验。实验结果表明:强脉冲激光聚焦于水介质产生爆炸性球面声源,探测器内部的声反射面将球面声信号转变为高指向性的平面波信号。通过对探测器的发射信号和接收的目标回波信号进行数值计算,得到探测器发射信号具有波束指向性窄、距离分辨力高和探测距离远等特点,满足水下目标探测的应用需求。
An underwater detector was designed based on the technology of laser-induced sound by underwater explosion.The mechanism of underwater explosion sound by laser was studied,and then the detecting experimental system was built.The experimental results show that the laser-induced sound signal might be produced by high-power pulse laser breakdown under water,and that the spherical laser-induced sound signal can be changed into the plane wave signal by the acoustic reflector inside the detector.The laser-induced sound signals from the detector are found to have the characteristics of narrow-beam direction,high range resolution and long detection range by numerical calculation,which meet the requirement of underwater detection.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2012年第12期2822-2826,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(51109217)
武器装备预研重点基金项目
关键词
激光声
水下爆炸
探测器
距离分辨力
laser-induced sound
underwater explosion
detector
range resolution
