毕业设计--单片机火灾智能报警系统设计

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1、 单片机火灾智能报警系统设计单片机火灾智能报警系统设计 单片机火灾智能报警系统设计 - I - 摘要摘要 本文利用单片机结合传感器技术而开发设计了这一火灾自动报警 系统。本设计将采用 DS18B20 数字温度传感器，可将温度信号直接 转换成数字信号送给单片机，电路简单，成本低；同时可设置温度报 警值，实现声光报警。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。采用 SMC1602A 液晶显示模块可 以直观的显示实时温度和气体浓度。选用最常用的 AT89S51 单片机 对所采集的数据进行处理。该火灾自动报

2、警系统结构简单、性能稳 定、使用方便、价格低廉，具有一定的实用价值。 关键字：火灾自动报警系统 单片机 MQ-2 单片机火灾智能报警系统设计 - II - Abstract This article used the Single Chip Microcomputer and sensor technology to develop has designed this automatic fire alarming system. This design will use the DS18B20 digital temperature sensor, the temperature signa

3、l can be converted directly into a digital signal and send to the Single Chip Microcomputer, the circuit is simple and low cost; At the same time, we can set the limiting temperature, and achieve the sound and light alarm. In which selects the MQ-2 semiconductor resistance type smog sensor realizes

4、the smog examination, has the high sensitivity, quickly responds, strong anti jamming ability and so on the merits, moreover the price is inexpensive, the service life is long. Liquid Crystal Module can be used the SMC1602A visual display real time temperature and gas concentration. The most commonly used 89S51 Single Chip Microcomputer used on the data collected for processing. This automatic fire alarming system is simple structure, stable performance, easy to use, low cost, and has certain pr