【作者】 樊辉；

【导师】 曾延安；

【作者基本信息】 华中科技大学 ， 光电信息工程， 2007， 硕士

【摘要】 烟雾透过率的测量在大气透过率的检测、物质结构分析等工农业生产上有着广泛的应用。随着计算机的日益普及,Internet(互联网络)己经成为人们日常生活的一部分。具备Internet的接入功能,己经成为众多使用微处理器的嵌入式应用的发展方向。烟雾透过率测量系统与Internet结合使得烟雾透过率的测量更加实用和灵活。用户可通过Internet浏览器对基于嵌入式Web服务器的透过率测量系统进行远程配置和访问,利用Web内容来报告采样数据、工作状态,实现对烟雾透过率测量系统的的远程监控。这样可以充分利用嵌入式系统集成度高、可靠性好、免维护的特点,提高了系统的工业适应性,大大降低了工业生产中的成本;同时,满足了野外设站、无人值守的应用要求,大大提高了工作效率;而利用开放的TCP/IP网络通信协议,任何的计算机都可以使用通用的网络浏览软件访问设备,不需要专门的计算机和专门的软件。本文的主要工作是基于ARM9的激光烟雾透过率测量系统的硬件和软件设计。首先分析了烟雾透过率的测量原理,以此为据设计了激光器驱动及调制电路、光电池的I-V转换电路、滤波电路、积分电路和计算机接口电路,实现了激光烟雾透过率远程测量系统的硬件部分。在硬件设计的基础上,进一步介绍了嵌入式Web服务器相关的网络协议和编程技术,并结合Socket编程技术和多线程编程技术实现了嵌入式Web服务器。在充分理解S3C2410的硬件结构的基础上,实现了Linux系统对ADC的驱动。最终实现了激光烟雾透过率远程测量系统。并在不同的条件下对系统做了测试,测试结果表明系统符合设计的要求。更多还原

【Abstract】 The transmissivity measuring of Plume is meaningful in industry and agriculture. It is mainly used in detecting the transmissivity of atmosphere, and analyzing the structure of matter. Along with the popularization of computer, internet is already a part of our life. Therefore, embedded application with function connecting to the internet becomes the orientation in development. The combining of measuring system and internet makes measuring transmissivity more credibility and agility. The measuring system based on embedded web server can be set and visited long-distance by using internet, and can also report data and state of work. The measuring system can take full advantage of embedded system which has high integration and great reliability without maintenance. The adaptability of system in industry is improved, and the cost in industrial produce is greatly reduced. At the same time, the application request which need work outside with no workers is satisfied, and the efficiency is greatly enhanced. Every computer can use current internet browser to visit devices by making use of TCP/IP internet communication protocal.Designing the hardware and software of the remote transmissivity measuring system of plume penetrated by laser based on ARM9 is the main job. The theory of transmissivity measuring was analysed first, and then the hardware of measuring system was realized with the circuit of processing data designed. Based on the hardware implemented, some internet protocol and technology of programming were introduced first, and then embedded web server was realized based on technology of socket programming and multi-thread programming. Besides, the driver of ADC is realized based on that the structure S3C2410 was understood. The remote transmissivity measuring system of plume penetrated by laser was realized at last. And then some experiment with different conditions was carried out. According to the result, the system worked correctly.更多还原