嵌入式系统论文：基于嵌入式ARM-Linux的图像采集与传输系统的研究.doc

嵌入式系统论文：基于嵌入式ARM-Linux的图像采集与传输系统的研究 【中文摘要】图像采集技术应用范围十分广泛,如在工业检测,交通道路,医学,军事以及科研等领域中。传统的图像采集系统大多是由相机、图像采集卡和PC构成,通过组建专用网络来进行图像的采集和传输。基于PC的远程图像采集系统结构复杂等缺点,某些领域中已经不能满足应用需求。随着嵌入式系统技术和图像采集技术的迅速发展,特别是ARM处理器和Linux在嵌入式系统中的广泛应用,使图像采集系统的体积小、低功耗、低成本、具有数据预处理功能、将图像采集、处理、I/O控制及通信集于一体等成为可能。基于这种背景,本文提出一种基于ARM-Linux的图像采集与传输系统的设计方案。本文首先对图像采集系统的现状做个简单分析,并说明了嵌入式图像采集系统具有传统采集系统无法比拟的优势。然后基于嵌入式处理器、CMOS数字图像传感器和以太网网络,提出本系统的总体设计方案。围绕系统方案详细介绍了具体实现方法。第一阶段：系统硬件设计。主要包括SDRAM、NORFlash、NANDFlash、OV9560图像传感器、SD卡、DM900网卡等接口电路设计以及制作电路板。第二阶段：构建嵌入式软件平台。包括系统引导程序vivi、Linux内核和yaffs2文件系统的移植及根文件系统制件。第三阶段：设计了图像传感器驱动和外部触发驱动程序,并编写相应的应用程序进行测试；设计生成BMP图像的程序用于把采集到的数据生成图像。第四阶段：移植嵌入式WEB服务器,设计网页模板,设计用户验证、参数设置和图像采集与显示等CGI程序。最后给出了系统测试的结果。 【英文摘要】Image acquisition technology was used widely in many fields, such as industrial inspection, traffic, medical, military and scientific research. Most of the traditional image acquisition system is be comprised of camera, image acquisition card and PC, and by building private networks for image acquisition and transmission. Remote PC-based image acquisition system can not meet the application requirements in some areas, because of its shortcomings of complex structure, low stability and reliability, expensive cost, cumbersome operation etc.With the rapid development of embedded system technology and image acquisition technology, especially the wide application of ARM processor and Linux in the embedded system,so it’s possible that the image acquisition system, small volume, low power consumption, low cost, data pretreatment function and the image acquisition, processing, I/O control and communication integrated in one. Based on this background, this paper presents the design scheme of image acquisition and transmission system based on ARM-Linux.Firstly, this paper gives us a brief introduction and analysis about the present situation of the image acquisition system, and describes that the embedded image acquisition system has incomparable advantages. Then, the design of the system i