基于stc单片机的火灾报警系统设计.doc

PAGE \* MERGEFORMAT II 基于STC单片机的火灾报警系统设计 摘 要 目前，随着电子产品在人类生活中的使用越来越广泛，由此引起的火灾也越来越多，在我们生活得四周到处潜伏着火灾隐患。为了避免火灾以及减少火灾造成的损失，我们必须按照“隐患险于明火，防患胜于救灾，责任重于泰山”的概念设计和完善火灾自动报警系统，将火灾消灭在萌芽状态，最大限度地减少社会财富的损失。 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。以STC89C52单片机和MQ-2型半导体电阻式烟雾传感器、DS18B20温度传感器为核心设计的烟雾报警器可实现声光报警、浓度显示、温度显示及报警限设置等功能。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。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STC89C52单片机，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。本报警装置具有一定的实用价值。 关键词：烟雾；温度；报警器；STC89C52；传感器 Abstract Now, with electronic products used in human life more and more widely, the resulting fire, more and more, we live in fire hazards lurking around everywhere. To avoid fires and reduce fire losses, we must follow the hidden dangers fire in prevention is better than disaster relief, the responsibility is extremely heavy. the concept design and improvement of automatic fire alarm system, fire nipped in the bud, the maximum reduce the loss of social wealth. The present paper take leaves the minor smog sensor and the monolithic integrated circuit technology unifies as the core and with other electronic technology, designs one kind of technical level good smog alarm apparatus. In which selects the MQ-2 semiconductor resistance type smog sensor realization smog the examination, has the sensitivity high, responds, the ant jamming ability quickly strong and so on the merits, moreover the price is inexpensive, the service life is long. Selec ts the STC89C52 monolithic integrated circuit, its conformity A/D transformed, the hardware multiplier, resources and so on hardware DS18B20 keyed, has high speed, low merits and so on power loss, ultra strong ant jamming, is the present similar technology neutral price quite high product. May realize the acoustic-optics take the STC89C52 monolithic integrated circuit and the MQ-2 semiconductor resistance type gas sensor as the core design smog alarm apparatus to report to the police, the