硕士学位论文
水下目标激光成像系统设计及研究SYSTEM DESIGN AND RESEARCH ON LASER IMAGING FOR UNDERWATER TARGET
徐天赐
哈尔滨工业大学
2013年6月
国内图书分类号：TN958.98 学校代码：10213 国际图书分类号：621.396.96 密级：公开
理学硕士学位论文
PRGR水下目标激光成像系统设计及研究
硕士研究生：徐天赐
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导师：付石友教授
申请学位：理学硕士
学科：光学
所在单位：理学院
答辩日期：2013年6月
授予学位单位：哈尔滨工业大学
Classified Index: TN958.98
U.D.C: 621.396.96
Disrtation for the Master’s Degree
SYSTEM DESIGN AND RESEARCH ON LASER IMAGING FOR UNDERWATER TARGET
Candidate：Xu Tianci
Supervisor：Prof. Fu Shiyou
Academic Degree Applied for：Master of Science
Speciality：Optics
电脑网速怎么测Affiliation：School of Science
广州游玩
Date of Defence：June, 2013
Degree-Conferring-Institution：Harbin Institute of Technology
哈尔滨工业大学理学硕士学位论文
摘要
广阔的海洋是21世纪人类进行科学和工程探索的重要领域，人们迫切希望使用更先进的手段进行海洋环境探测与海洋资源开发。近年来，随着激光器输出功率的增强和新型光电器件的发展，水下目标激光成像技术成为一种新型海洋探测技术，具有精度高、速度快等优势。本文对基于脉冲激光器和条纹管探测器的水下目标激光成像系统进行了系统设计及研究。
首先，介绍了本文研究的水下目标激光成像系统的核心器件条纹管的结构及成像原理，并构建了条纹
管成像目标距离计算模型，分析了条纹管对探测目标的距离分辨能力。根据条纹管激光成像系统成像视场导出大视场激光雷达方程，得出条纹管激光成像系统的探测深度与衰减系数的关系。
其次，搭建了一套条纹管激光成像系统，分硬件系统和软件系统两大部分对成像系统的激光发射机、同步触发系统、光学系统、系统软件编程、图像处理算法等重要内容进行了详细地介绍和分析。
再次，对激光在水中的传输特性进行分析，研究了激光水下衰减系数的比较测量法，通过在激光传输路径上进行多点测量激光能量或功率，经过数据拟合获得准确的激光水中衰减系数，在实验室中测量了脉冲绿光、连续绿光、连续蓝光在自来水中衰减系数并进行了比较。
最后，在室内对距离15m的一组目标进行成像实验，获得了目标的强度图像、距离图像和三维距离图像。并进一步对实验结果进行分析，验证了条纹管激光成像系统的成像能力和距离分辨能力。
关键词：条纹管；水下目标；激光成像；图像处理
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哈尔滨工业大学理学硕士学位论文
Abstract马融
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The ocean is an important domain for scientific and engineering rearch in twenty-first century. It is urgent to develop advanced methods to discover and exploit the a. In recent years, the lar imaging system for underwater target became a novel oceanic detection technique due to the development of high energy lar and optoelectronic devices. Lar imaging system has the advantages of high resolution and high efficiency. In this article, lar imaging system for underwater target using puld lar and streak tube is designed and discusd.
Firstly, the structure and principle of the streak tube which is the key instrument of the lar imaging system for underwater target are prented. And the target range detection model for streak tube imaging system is built. The range detection capability of streak tube is discusd. Bad on the field of view of streak tube imaging system, the lidar equation in large field of view is built. The relationship between detection range and attenuation coefficient is obtained.
Secondly, a proto of streak tube lar imaging system is built. The hardware and software of this imaging system including lar, synchronization module, optical system, programming and image processing algorithm are discusd.
Thirdly, the property of lar propagation in water is analyzed. The comparative measurement of atte
nuation coefficient of lar light in water is investigated. We process the values of lar light energy or power measured in multiple positions on the route of lar propagation by data fitting to obtain the attenuation coefficient of lar light in water precily. We measure the attenuation coefficients of green pul lar, continuous green and blue lar in the laboratory and then discuss the comparisons of them.
Fourthly, an imaging experiment is carried out in the laboratory. We obtain the intensity image, range image and 3D range image for targets situated 15m far from the imaging system. The result of the experiment demonstrates the 3D imaging capability of streak tube lar imaging system.
Keywords: streak tube, underwater target, lar imaging, image processing.
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