基于无线传感器网络的智能家居安防系统初步构建.docx

摘要
智能家居安防系统是利用计算机技术、微电子技术、通信技术，通过家庭智能终端及其系统软件将家庭智能化的所有功能集成起来实现居家安全防范。家居安防包括防盗、防燃气泄漏、防火等功能，并具备远程监控，住户可以通过网络或电话随时了解家内情况。
本文基于智能家居安防对室内煤气含量的检测技术及可燃气体传感器做了概括的介绍，系统中单片机系统主要完成信号采集、数据通信，微机完成数据接收、存入数据库、数据处理、显示及开启和关闭家用电器等功能。详细讨论了以单片机AT89S52为控制核心、MQ306A集成可燃气体传感器、采用RS232接口通信、ADC0809模数转换进行数据传输的智能家居安防系统初步构建的设计方案。下位机软件设计中采用汇编语言编写数据采集程序和对RS232接口芯片进行协议处理及数据交换的程序。后台处理软件的数据处理程序应用VC语言编写，给出了控制软件流程及源程序代码。
本次毕业设计达到了预定的目标，实现了对室内可燃气体含量的采集与实时显示，并可以根据预警值自动开启排风扇。针对在系统调试过程中出现的问题提出了解决方案及方法。
关键字：可燃气体传感器；RS232；数据采集；89S52
Abstract

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