摘  要随着我国经济的发展，人民生活、生产用电量的大幅度增加，低压电气火灾的发生率在逐渐增加，并有上升趋势。国家络续制定了消防规范和电气火灾报警器设计规范，以此减少电气火灾的发生次数。电气火灾报警器以及智能灭火装置有着较大的前景。但是市场上高端的多功能火灾报警设备价格高，较为经济的产品存在结构简单，功能单一，精度不高的问题。开发一种适合适用性较广、价格经济、准确度较高的火灾报警灭火装置具有现实的意义。70417

本文首先介绍目前国内外火灾报警器的发展现状，分析多种可能引起电气火灾的原因，说明多传感器火灾报警灭火装置的特点和意义。

其次，介绍了多传感器火灾报警灭火装置的设计方案。文章内详细阐述了了基于STC12C5A16S2单片机的多传感器火灾报警灭火装置的设计原理和实现方法。在硬件方面，首先介绍了硬件的资料，其主要由STC12C5A60S2单片机、温度传感器、烟雾传感器、火焰传感器、LCD、晶振电路、复位电路、声光报警电路、供水电路、以及按钮组成的人机接口组成。接着各个模块如何实现功能进行介绍，以及组合后实现火灾报警灭火的功能。

该论文有图20幅，表3个，参考文献16篇。

毕业论文关键字：火灾报警  灭火装置  多传感器  STC单片机

Prediction and Prevention of Low voltage Electrical Fire

Abstract

  With the development of our country's economy, increase the efficiency of people's life and production, low voltage electrical fires incidence in gradually increasing, and has a rising trend. National network continue to develop the fire code and electrical fire alarm system design specifications, to reduce the happening of the electrical fire. Electrical fire alarm system and intelligent fire extinguishing device has great prospects. But high-end multifunction fire alarm devices on the market price is high, the more economic product is simple in structure, single function, accuracy is not high. Has a wide applicability to develop a suitable, economic price, high precision of fire alarm fire extinguishing device has the reality significance.This paper first introduces the present development of fire alarm system at home and abroad, analyses several possible cause of electrical fire.The cause of the disaster, the multi-sensor fire alarm fire extinguishing device characteristics and significance.

  Secondly, the paper introduces the design of the multi-sensor fire alarm fire extinguishing installation plan. The article in detail based on STC12C5A16S2 microcontroller multi-sensor fire alarm fire extinguishing system design principle and implementation method. In the aspect of hardware, first introduced the hardware information, its main controlled by STC12C5A60S2, temperature sensor, smoke sensor, flame sensor, LCD, crystals circuit, reset circuit, sound and light alarm circuit, water supply of man-machine interface circuit, and buttons. Then each module introduces how to realize the function, and can realize the function of fire alarm fire after combination.

Key word: Fire alarm  Extinguishing equipment  Multiple sensors  STC microcontroller

目  录

摘  要 I

Abstract II

目  录 III

图清单 IV

表清单 IV

1 绪论 1

1.1 引言 1

1.2火灾报警系统的国内外发展现状 2

2 电气火灾报警器的概述