采用rfid技术的交互式展示系统开发.doc

华中科技大学硕士学位论文摘要展示设计广泛应用于各种科技馆、展览馆、博物馆中,同时其发展对于科技发展、社会进步有着巨大的促进作用。完成一套展示系统的设计与开发,并在工程实际中得到应用,这是本课题的一个关键任务。因此,找到一种合适的技术方案并实现它是课题的重点,也是这篇论文的重点所在。通过比较两种技术方案,我们选择了适合本展示系统的 RFID 方案, RFID 的优点是实时性好、可靠性高并具有非接触性。对于整个展示系统的硬件设计,由于各个 RFID 阅读器之间采用总线连接,故需选择一种适当的总线技术。对比现有的各种总线技术,最终采用 RS485 总线来连接整个展示系统。并对整个 RS485 总线的网络进行研究。由此建立起基于 RS485 总线的硬件系统。本文涉及的软件技术是 DirectShow 技术,设计了基于 DirectShow 的视频播放软件,该软件是本文软件方案的基础。最后,通过实际工程应用,对整个展示系统的各种调用逻辑关系进行修复,并最终完成整个软件流程的设计。同时对其中涉及的两个关键点(信号冲突和视频切换)作了相应的设计。最后对整个系统进行了测试, 经过长时间测试,最终其实时性、可靠性、准确性都比较好。从创建系统理论出发,到系统在工程中的实际应用,我们经历了整个系统的方案选择、软硬件设计和系统的测试,使我们更加深入的理解了展示系统的概念! 关键词: 展示 RFID RS485 总线 DirectShow I 华中科技大学硕士学位论文 Abstract The display design is widely used in various science and technology centers, exhibition halls and museums. At the same time, its development promotes the science and technology development and social progress. Realizing a display system isa key task in this project. So, finding an appropriate technical scheme is the key point of this project and also this paper. Comparing the two kinds of technical scheme, we choose the RFID scheme, which is fit for our display system. RFID has the advantage of real-time, high reliability and is non-contact. Since there are buses between RFID readers, we need to choose an appropriate bus technology for the entire display system. Comparison of the existing bus technology, eventually we use RS485 bus to link the entire display system. And make research in the whole work. Finally, establish the RS485-based hardware system. In this paper, the software technology is the DirectShow technology, Design the Video Player software, which based on DirectShow. And this software is the basis for the program. Finally, the practical application of the entire display system restore the logical relations , and plete the whole process of software design. Also provide a solution to the two key problems (signal conflict and video switching) of the system. Finally, the whole system was tested a long period of time. The real-t