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Design and Implementation of Control System for Range-gated Underwater Laser Imaging

机译：距离门水下激光成像控制系统的设计与实现

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There is currently considerable in developing underwater target detection, the underwater imaging system can be divided into active imaging system and passive system. The main feature of the active imaging system is that they use light sources to illuminate the targets and collect the reflection from targets. The advantages of active imaging system over passive imaging systems are high contrast and without the affection of environment sources. In this article, a range-gated underwater laser imaging system is built, which consists of laser illumination system, photoelectric imaging system and control system. The laser illumination system includes a light-pumped solid state doubled ND-YAG laser(532nm) which laser power and frequency can be adjusted and an optics expanding system of variable ratio. The photoelectric imaging system includes a gated Intensified CCD(ICCD) cameras which ICCD scheduling, gate width, delay time and gain can be adjusted and a optics received system of variable ratio. In order to acquire effectual target image using range-gated underwater laser imaging system, appropriate control parameters that include laser power and frequency, ICCD scheduling, gate width, delay time and gain, optics expanding system ratio and optics received system ratio must be given accurately. A control system which used C8051F320 and C8051F040 (MCU) as the core is designed, the control system can effectively control seven parameters that given above. The construction of software and hardware of the control system is introduced. And target image of underwater distance 25 m and 40m is given, Experimental results showed that the control system has high control precision, safe and stable operation and good speed adjusting performance can be achieved. It can be satisfied to apply to underwater target detection.
机译：当前在开发水下目标检测方面有很多，水下成像系统可分为主动成像系统和被动成像系统。主动成像系统的主要特征是它们使用光源照亮目标并收集目标反射。主动成像系统相对于被动成像系统的优势是高对比度且不受环境源的影响。本文建立了一种距离选通的水下激光成像系统，该系统由激光照明系统，光电成像系统和控制系统组成。激光照明系统包括可调节激光功率和频率的光泵浦固态双倍ND-YAG激光器（532nm）和可变比例的光学扩展系统。光电成像系统包括一个门控增强型CCD（ICCD）摄像机，该摄像机可以调整ICCD调度，门宽，延迟时间和增益，以及可变比率的光学接收系统。为了使用距离选通的水下激光成像系统获取有效的目标图像，必须准确给出包括激光功率和频率，ICCD调度，门宽，延迟时间和增益，光学扩展系统比例和光学接收系统比例在内的适当控制参数。 。设计了一个以C8051F320和C8051F040（MCU）为核心的控制系统，该控制系统可以有效地控制上述七个参数。介绍了控制系统的软硬件结构。给出了水下距离为25 m和40 m的目标图像，实验结果表明该控制系统控制精度高，运行安全稳定，可以实现良好的调速性能。满足水下目标检测的要求。

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