基于距离选通成像系统的水下目标探测技术研究

Underwater objects detection using range-gated imaging system

摘要: 基于距离选通原理，采用波长为532 nm、脉冲宽度为20 ns的Nd∶YAG激光器和距离选通ICCD成像系统，通过脉冲激光照射水下目标，ICCD系统同步选通接收，对漫射衰减系数约为0.45的8 m水深内的水下目标的成像能力进行了实验研究，获得了10 ns的图像选通效果和7 m的探测能力。实验结果表明，距离选通成像方法是一种快速、有效的水下目标探测和识别手段。

Abstract: Based on range-gate principle, a Nd∶YAG laser, whose frequency was doubled to yield a wavelength of 532 nm, was used as the light source, and rangegated Integrated Circuit Card Device(ICCD) system was used as the receiver. The experiment with range-gated method was conducted in 8 m depth water with diffuse attenuation coefficient k0.45. Maximum underwater detection depth of 7 m and 10 ns image gate were achieved. The experimental results show that the range-gated imaging method is a rapid and effective technology for underwater object detection and reorganization.