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Alternative TitlePlatform Construction of Beam-Target Coupling System and Research on Key Technologies in Beam-Target Coupling
Thesis Advisor田捷
Degree Grantor中国科学院大学
Place of Conferral中国科学院自动化研究所
Degree Discipline计算机技术
Keyword惯性约束聚变 束靶耦合 霍夫变换 Ransac 跟踪 Qt Inertial Confinement Fusion Beam-target Coupling Hough Transform Ransac Tracking Qt
Abstract能源是人类社会赖以生存和发展的基石。人类社会在不断发展的同时,也面临着日益严重的能源问题。核聚变的过程中放出巨大的能量为人类解决能源危机提供了一个重要的选择。激光惯性约束核聚变(ICF)的技术实现了核聚变过程的可控性,从而该过程中释放出来的巨大能量可以为人类所利用。 自从用强激光器来引发核聚变反应的设想被提出后,世界上研究核聚变的国家争相开展了激光惯性约束核聚变的研究。高精度束靶耦合是激光惯性约束聚变中极为关键和核心的环节。各国的研究机构根据各自硬件平台的特点,分别采用不同的技术路线实现高精度束靶耦合。 本文以激光惯性约束聚变为背景,在广泛阅读激光惯性约束聚变和束靶耦合技术的国内外相关文献资料的基础上,对束靶耦合技术进行了深入研究。论文的主要工作包括: (1)束靶耦合实验硬件平台搭建。该平台包括基于共轭原理的靶面传感器,可以实现对靶的位置和姿态以及多路模拟光在靶上的弹着点位置的实时监测;由直线位移台、六自由度Stewart平台和长悬臂构成的靶定位系统,可以实现靶大范围的粗定位以及靶位置和姿态的高精度调节;激光引导系统,可以实现多束激光光斑大小调节以及光斑在靶表面弹着点位置的控制。 (2)提出了基于Hough变换的靶倾斜角度检测方法用以粗略调整靶的倾斜角度;提出了基于RANSAC算法的靶侧面内腔椭圆提取方法为靶定位提供位置和姿态反馈; (3)参考mean-shift思想提出了一种多光斑跟踪算法,为多光束引导提供位置反馈。 (4)基于Qt开发了一套束靶耦合控制软件。通过该软件,用户可以实现对整个束靶耦合硬件平台的灵活控制。同时,该软件具有模块化、低耦合、可配置等特点,方便后续研究人员在此软件框架下快速进行GUI开发和束靶耦合关键算法的研究。
Other AbstractEnergy is the cornerstone of the survival and development of human society. With its continuous development, human society is facing the increasingly serious energy problem. The enormous energy released in the nuclear fusion process provides an important option for human to solve the energy crisis. Laser Inertial confinement fusion (ICF) technology can achieve the controllability of the nuclear fusion process, thus make the tremendous energy available for human use. Since the idea of triggering nuclear fusion reactions with high-energy laser was proposed, countries have been competing to carry out researches on ICF. The high-precision coupling of beam and target is a most critical part of the laser inertial confinement fusion. National research institutions adopt different technical routes to achieve high-precision beam-target coupling. Under the background of ICF, this thesis conducts deep research on beam-target coupling based on extensive literature analysis of ICF and beam-target coupling technology. The main work of the thesis is as follows. (1) Build the beam-target coupling hardware platform. The platform includes sensors, target positioning system and laser alignment system. The sensors based on conjugated principle which can achieve real-time monitoring of the position and posture of the target and the locations of laser spots. Target positioning system which consists of linear displacement stage, a six-degree-of-freedom Stewart platform and a long cantilever, can achieve coarse positioning in wide range, high-precision adjustment of position and posture in details for the target. Laser alignment system can adjust locations of laser spots on the surface of target. (2) Propose a tilt angle detection method based on Hough transform to adjust the target coarsely, and an ellipse detection method based on RANSAC to provide position and posture feedback for target adjustment. (3) Propose a multi-laser-spot tracking algorithm referring to mean-shift to provide position feedback for multi-laser-spot alignment. (4) Develop a suite of software for beam-target coupling based on Qt. The software has the characteristics of modularization, low coupling, and can be configured. With this software, users can achieve flexible control of the entire beam-target coupling hardware platform. Subsequent researchers can develop GUIs and study key algorithms for beam-target coupling rapidly.
Other Identifier2010E8014669009
Document Type学位论文
Recommended Citation
GB/T 7714
姚锴. 模拟束靶耦合实验平台建设及关键技术研究[D]. 中国科学院自动化研究所. 中国科学院大学,2013.
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