毕业论文-基于单片机的火灾报警系统的设计与实现.doc

河南科技学院 2010 届本科毕业设计 设计题目：基于单片机的火灾报警系统的设计与实现 学生姓名： 所在院系： 所学专业： 导师姓名： 完成时间： 2012-05-25 摘要 随着“信息时代”的到来，作为获取信息的手段传感器技术得到了的进步，其应用领域越来越广泛，对其要求越来越高，需求越来越迫切。传感器技术已成为衡量一个国家科学技术发展水平的重要标志之一。因此，了解并掌握各类传感器的基本结构、工作原理及特性是非常重要的。本文利用单片机结合技术而开发设计了这一可燃气体敏感元件With the advent of information times, as a means of accessing information -- sensor technology has been significant progress, its application field is more and more extensive, the requirement is more and more high, more and more urgent need. The sensor technology has become a national science and technology development level of one of the important symbols. Therefore, understanding and mastering of sensors structure, working principle and characteristic is very important. In order to improve the sensor s understanding and the understanding, especially for the smoke sensor research and its usage and use, based on practical, and the principle and design the typical system. In this paper, combined with the use of single-chip sensor technology development and design of the smoke control system.. In this paper, resistance type smoke sensor and single-chip microcomputer as the core technology and electronic technology, designs a technology better smoke alarm. The selection of MQ-2 type semiconductor gas sensitive element smoke sensor smoke detection, which has high sensitivity, fast response, strong anti-interference ability, and the price is low, long service life. The selection of AT89S52chip, the integration of the A / D conversion, hardware multiplier, hardware pulse width modulator and other resources, with high speed, low power, strong anti-interference and other advantages, is of similar technology neutral price comparison high yield quality. With AT89S52 MCU and MQ-2 type semiconductor resistor type smoke sensor as the core design of the smoke alarm can alarm, fault diagnosis, concentration level display, alarm limit settings, temperature display and temperature alarm value set