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中文摘要：
基于增强现实技术，将实物用户界面应用到虚拟装配系统中，在单摄像头的条件下，将虚拟零件模型加载至实物标记上，用户通过操作实物标记来控制虚拟模型，完成装配过程。相比于传统的虚拟装配交互方式，增强了用户操作的切实感。根据装配任务需求设计了4类实物标记。提出了3种交互技术，包括接近性原理，匹配约束信息提示与判定，以及视点控制等，并且结合碰撞检测来实现精确而又自然的虚拟装配。该系统可以帮助设计人员方便地对产品设计进行分析和改进，降低用户的学习难度。
英文摘要：
Based on Augmented Reality, we developed a virtual assembly system using Tangible User Interface. In the condition of single camera, it connects real markers and virtual models of the components. Users control the virtual models by manipulating tangible markers to accomplish the assembly procedure. Compared to traditional virtual assembly, it improved the sense of reality during the operation. We designed four kinds of markers according to the demands of the assembly task. Three interaction techniques, including proximity, constraint information judgment and view control are proposed. Besides, we also used collision detection to realize accurate and natural virtual assembly. The system can help designers analyse and improve products, and it＇ s also easier for users to learn.
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