目  錄
摘  要 1
ABSTRACT 2
第1章  緒  論 1
1.1  選題背景及意義 1
1.2  本文所做的工作 1
第2章  火災(zāi)自動(dòng)報(bào)警系統(tǒng)的工作原理 2
2.1  系統(tǒng)總體功能概述 2
2.2  火災(zāi)報(bào)警系統(tǒng)的類型 2
2.3  火災(zāi)探測(cè)器的原理 3
第3章  系統(tǒng)硬件設(shè)計(jì) 5
3.1  核心芯片選擇 5
3.2  單片機(jī)外圍接口電路 8
3.3  信號(hào)處理電路 9
3.4  A/D轉(zhuǎn)換模塊 10
3.5  聲音報(bào)警電路 11
3.6  數(shù)碼管顯示電路 12
3.7  狀態(tài)指示燈及控制鍵電路 13
3.8  報(bào)警器故障自診斷 14
第4章  系統(tǒng)軟件設(shè)計(jì) 15
4.1  主程序流程圖 15
4.2  主程序初始化流程圖 16
4.3  濾波子程序 16
4.4  線性化子程序 17
4.5  報(bào)警子程序 19
4.6  鍵盤(pán)處理子程序 21
結(jié)論 22
致謝 23
參考文獻(xiàn) 24

 
摘  要
目前，隨著電子產(chǎn)品在人類生活中的使用越來(lái)越廣泛，由此引起的火災(zāi)也越來(lái)越多，在我們生活得四周到處潛伏著火災(zāi)隱患。為了避免火災(zāi)以及減少火災(zāi)造成的損失，我們必須按照“隱患險(xiǎn)于明火，防患勝于救災(zāi)，責(zé)任重于泰山”的概念設(shè)計(jì)和完善火災(zāi)自動(dòng)報(bào)警系統(tǒng)，將火災(zāi)消滅在萌芽狀態(tài)，最大限度地減少社會(huì)財(cái)富的損失。
本系統(tǒng)可安裝在各防火單位，它負(fù)責(zé)不斷地向所監(jiān)視的現(xiàn)場(chǎng)發(fā)車巡檢信號(hào)，監(jiān)視現(xiàn)場(chǎng)的溫度、濃度等，并不斷反饋給報(bào)警控制器，控制器將接到的信號(hào)與內(nèi)存的正常整定值比較、判斷確定火災(zāi)。當(dāng)發(fā)生火災(zāi)時(shí)，可實(shí)現(xiàn)聲光報(bào)警、故障自診斷、濃度顯示、報(bào)警限設(shè)置、延時(shí)報(bào)警及與上位機(jī)串口通信等，是一種結(jié)構(gòu)簡(jiǎn)單、性能穩(wěn)定、使用方便、價(jià)格低廉、智能化的煙霧傳感器，具有一定的實(shí)用價(jià)值。

關(guān)鍵詞  單片機(jī)  火災(zāi)報(bào)警  傳感器

 
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 system can be installed in all fire units, which is responsible for continuously monitoring the site to start the inspection signal, monitor the site of temperature, concentration, and continuous feedback to the alarm controller, the controller will receive the signal and the normal memory setting value was determined by comparing to determine the fire. When fire occurs, can achieve sound and light alarm, fault diagnosis, concentration display, alarm limit settings, delay alarm and serial communication with the host computer is a simple structure, stable performance, easy to use, inexpensive, intelligent smoke sensor, has some practical value.

   Keywords ： SCM   fire alarm  sensor