嵌入式无线投影网关的研究与设计

发布时间：2018-01-10 21:04

本文关键词：嵌入式无线投影网关的研究与设计　出处：《南京理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：嵌入式就是将微处理器芯片植入各种电子设备的内部,从而实现设备的一体化、小型化和智能化。随着科学技术和信息技术的不断发展,各种数字化产品的不断普及,嵌入式系统设备正在被应用在我们生活的各个方面,包括消费电器,工业设备,民用产品以及军用器材等,在自动化控制、国防军事、消费电子等各个领域随处可见。嵌入式系统已是21世纪的热点应用,具有广泛的发展潜力和应用前景。本文所描述设计的嵌入式无线投影网关采用的是ARM Cotex-A9处理器和Android操作系统,该无线投影网关可以通过标准的VGA接口与传统的投影机相连,用户可以通过无线网络与网关建立连接并进行数据传输。用户通过用户端软件获取普通PC或笔记本电脑以及移动设备(如智能手机和平板电脑)的屏幕图像并进行压缩,通过无线网络传送给无线投影网关,无线网关解压图片并通过VGA接口在投影仪屏幕上还原显示出来,使用户投影不需要有线连接,摆脱了连线的束缚,投影者可以在一定的范围内自由的移动,因此,该无线投影网关在商务会议、多媒体教学及智能家居等方面有着广阔的应用前景。本文首先介绍了现今国内外无线投影网关的发展以及所采用的无线局域网技术,然后介绍了无线投影网关的总体设计方案,包括硬件的构成和软件的设计。对系统中的关键技术进行了详细的介绍,其中包括屏幕图像的截取、JPEG图像的压缩算法研究、Linux系统的定制、Linux系统中无线网络的配置以及Web服务器的设计移植等。最后,对整个系统进行了了测试,网络传输速度以及投影效果都基本满足产品需求。
[Abstract]:Embedded is to implant microprocessor chips into the interior of various electronic devices, so as to achieve the integration of equipment, miniaturization and intelligence. With the development of science and technology and information technology. With the increasing popularity of digital products, embedded system equipment is being applied in all aspects of our life, including consumer appliances, industrial equipment, civilian products and military equipment, in automatic control. Defense, military, consumer electronics and other fields can be seen everywhere. Embedded system has been a hot application in 21th century, and has wide development potential and application prospects. The embedded wireless projection gateway described in this paper uses ARM Cotex-A9 processor and Android operating system. The wireless projection gateway can be connected to traditional projectors via a standard VGA interface. Users can connect to gateways and transmit data via wireless networks. Users can access ordinary PCs or laptops and mobile devices (such as smartphones and tablets) through client software. And compress it. Through the wireless network transmission to the wireless projection gateway, the wireless gateway decompresses the picture and displays it on the projector screen through VGA interface, so that the user projection does not need a wired connection, and gets rid of the shackles of the connection. The projector can move freely within a certain range. Therefore, the wireless projection gateway has a broad application prospect in business conference, multimedia teaching and smart home. This paper first introduces the development of wireless projection gateway at home and abroad and the technology of wireless local area network, then introduces the overall design of wireless projection gateway. Including the hardware structure and software design. The key technologies in the system are introduced in detail, including the screen image capture JPEG image compression algorithm to study the customization of Linux system. The configuration of wireless network in Linux system and the design and transplantation of Web server etc. Finally, the whole system is tested and the network transmission speed and projection effect are basically satisfied with the requirements of the product.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP368.1;TP391.41

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