井下抢险音视频无线传输的研究

发布时间：2018-04-16 12:35

本文选题：无线通信 + Linux　；参考：《西安工程大学》2015年硕士论文

【摘要】：近年来,国家对矿井安全生产越来越重视,但是由于井下环境复杂且不可控因素甚多,导致矿难时有发生。发生矿难后,救援环节最关键,由于我国井下救援通信技术发展较为缓慢,设备相对落后,一定程度上影响了救援的效果,所以研究出高效的应急救援通信系统是十分必要的。本文主要研究音视频的无线传输部分,它是救援通信系统的前端,音视频信息传输至PC端后会通过有线传输的方式传送至地面救援指挥部。二十世纪以来无线通信技术发展迅速,已被广泛应用于监控安防等领域。矿难后,有线通信几乎瘫痪,重新布线费时费力,采用无线通信技术临时搭建一个无线局域网,就能够快速实现井下音视频的传输,且具备成本低、灵活性高等优点。论文以ARM9芯片S3C2440A微处理器为核心搭建了系统的硬件平台,并在此平台上移植了嵌入式Linux操作系统,通过Wi-Fi无线网卡与无线路由器构建临时的无线局域网,实现采集端到PC端音视频的无线传输。论文中对硬件部分各个模块进行了详细的分析介绍,硬件部分主要包括:S3C2440A微处理器、音视频采集模块、Wi-Fi通信模块、电源模块、存储模块及各种通信接口模块等。在软件设计中,介绍了嵌入式系统开发环境的搭建,内核的移植,底层驱动与应用程序的开发流程等。通过实验验证后,音视频传输效果良好,图像清晰,达到了预期目标。最后,对论文进行了分析总结,并对今后的研究方向提出了展望。
[Abstract]:In recent years, the national coal mine safety production more and more attention to, but because many uncontrollable and complex underground environment factors, causing accidents have occurred. After the accident occurred, the most critical part of the rescue, due to the development of China's mine rescue communication technology is relatively slow, the equipment is relatively backward, to a certain extent affected the rescue effect, so study on emergency rescue communication system with high efficiency is very necessary. This paper mainly studies the wireless transmission of audio and video, it is a front-end rescue communication system, audio and video information transmission to the PC terminal will by way of cable transmission is transmitted to the ground rescue headquarters. Wireless communication technology rapid development since twentieth Century, has been widely used in the security monitoring field. After the accident, the wired communication is almost paralyzed, time-consuming rewiring, using wireless communication technology to build a temporary wireless local area network, can Fast transmit audio and video, and has low cost and flexibility. Based on ARM9 S3C2440A microprocessor chip as the core to build the hardware platform of the system, and based on this platform, transplant the embedded Linux operating system, through the Wi-Fi wireless network card with no line for the construction of the wireless LAN by temporary, realize the acquisition end to wireless transmission PC audio and video. The hardware part of each module are analyzed in detail, the hardware mainly includes: S3C2440A microprocessor, audio and video acquisition module, Wi-Fi communication module, power module, memory module and communication interface module etc. in the software design, is introduced to build the development environment of embedded systems. Kernel porting, driver and application development process. Through the experiment, audio and video transmission effect is good, clear image, to achieve the expected goal At the end of this paper, the paper is analyzed and summarized, and the future research direction is put forward.

【学位授予单位】：西安工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD655

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