目录
摘要 ........................................................................................................................................... I Abstract ...................................................................................................................................... II 前言 ........................................................................................................................................ III 1 总体方案设计 (1)
2系统原理及原理图 (2)
3 系统的硬件电路 (3)
3.1 控制模块设计 (3)
3.1.1 单片机选型 (3)
3.1.2单片机最小系统 (4)
3.2 检测电路设计 (6)
3.2.1 烟雾检测电路 (6)
3.2.2 温度检测电路设计 (11)
3.3 显示与报警电路 .......................................................................... 错误!未定义书签。
3.3.1显示电路 (15)
3.3.2 报警电路 (16)
3.4 按键控制及电源电路设计 (16)
4 系统主程序设计及流程图 (18)
4.1 主程序设计 (18)
4.2 滤波子程序设计 (19)
4.3 线性化处理子程序设计 (19)
4.4 报警子程序设计 (20)
4.5 控制按键设计子程序 (21)
5 硬件调试 (22)
结论 (23)
致谢 (24)
参考文献 (25)
附录1：总体原理图设计 (26)
附录2：元器件清单 (27)
附录3：PCB图 (28)
附录4：实物图 (29)
附录5：部分程序源代码 (30)
智能火灾报警系统的设计
摘要
随着社会和经济的发展，防火工作越来越重要，但是目前国内的许多研发都侧重于大型场所的火灾报警。因此，研发一种小型智能报警器是十分必要的，报警器是用烟雾传感器组成的。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。为了提高对传感器的认识和了解，尤其是对烟雾传感器的深入研究以及其用法与用途，基于实用、广泛和典型的原则而设计了本系统。本文利用单片机结合传感器技术而开发设计了这一烟雾监控系统。。
本论文以电阻式烟雾传感器和单片机技术为核心并与其他电子技术相结合，设计出一种技术水平较好的烟雾报警器。其中选用MQ.2型半导体可燃气体敏感元件烟雾传感器实现烟雾的检测，具有灵敏度高、响应快、抗干扰能力强等优点，而且价格低廉，使用寿命长。选用的STC12C5410AD单片机，其整合了A/D转换、硬件乘法器、硬件脉宽调制器等资源，具有高速、低功耗、超强抗干扰等优点，是目前同类技术中性价比较高的产品。以STC12C5410AD单片机和MQ.2型半导体电阻式烟雾传感器为核心设计的烟雾报警器可实现声光报警、故障自诊断、浓度显示、报警限设置、延时报警及与上位机串口通信等功能。是一种结构简单、性能稳定、使用方便、价格低廉、智能化的烟雾报警器。具有一定的实用价值。
关键词：烟雾；报警器；STC12C5410；传感器
THE DESIGN OF
INTELLIGENT FIRE ALARM SYSTEM
Abstract
With the advent of the "information age" as a means of access to information . sensor technology has been significant progress, and its applications more widely, its increasingly high demand, the demand for more and more urgent. Sensor technology has become the measure of a country's level of development of science and technology an important symbol. Therefore, to understand and master the basic structure of the various types of sensors, the working principle and characteristics are very important.In order to increase awareness and understanding of the sensor, especially in.depth study of the smoke sensor and its usage and purpose, based on practical, widespread and typical design principles of the system. In this paper, the use of single.chip sensor technology combined with the development and design of the smoke control system. .
In this thesis, smoke sensors and resistive core chip technology and combined with other electronic technology, design a technical level better smoke alarms.Which choice MQ.2.type semiconductor combustible gas sensors to detect smoke smoke sensor to achieve, with high sensitivity, fast response, anti.interference ability, etc., and inexpensive, long service life. Optional STC12C5410AD microcontroller, which integrates A / D conversion, hardware multiplier, hardware resources such as pulse width modulator with high.speed, low power consumption, super anti.jamming, etc., similar technology is currently higher cost products.
Keywords：Smoke；Alarms；STC12C5410；Sensors
