【正文】 sign a method that use single chip puter and digital voice chip ISD1420 to realize remote voice alarm, gives out the hardware structure and software of system, Based on the singlechip microputer AT89C51, dial chip MT8880 and speech chip ISD1420,temperature sensor AD590 and gas sensor TGS202 are used, and the multisensors information processing method is adopted . Practice the enunciation, The singlechip microputer technique has the extensively applied foreground in system alarm and other automatic control realm. This system can automatically to monitor the points which are acute to temperature. It can also send out alarm, show the points and record the occurring time when a fire has broke out. 【 Key words】 MCU Transducer Data Process Alarm 1 緒論 概述 無線火災(zāi)傳感器硬件和軟件平臺的設(shè)計(jì)對于整個(gè)系統(tǒng)的開發(fā)與應(yīng)用至關(guān)重要，作為整個(gè)系統(tǒng)的底層支持，其必然向微型化、高度集成化、網(wǎng)絡(luò)化、節(jié)能化、智能化的方向發(fā)展，近幾年，隨 著計(jì)算機(jī)成本下降和微處理器體積縮小，開發(fā)和構(gòu)造火災(zāi)智能無線報(bào)警系統(tǒng)將有廣闊的應(yīng)用前景。 I 目 錄 緒論 ...................................................................................................................................... 1 概述 ........................................................................................................................ 1 國內(nèi)外研究狀況 .................................................................................................... 1 課題研究背景及目的 ............................................................................................ 1 2 系統(tǒng)硬件設(shè)計(jì) .................................................................................................................. 3 概述 ....................................................................................................................... 3 系統(tǒng)芯片和器件的選擇 ....................................................................................... 3 傳感器介紹 .................................................................................................. 3 ISD1420 語音芯片 ....................................................................................... 4 MT8880 介紹 ................................................................................................ 6 AT89C51 簡介 ............................................................................................... 6 系統(tǒng)的硬件實(shí)現(xiàn) .................................................................................................... 8 系統(tǒng)功能及特點(diǎn) .......................................................................................... 8 MT8880 接收電路的設(shè)計(jì) ............................................................................ 9 發(fā)送電路設(shè)計(jì) ............................................................................................ 10 燈光報(bào)警電路 .............................................................................................11 信號音檢測電路 .........................................................................................11 系統(tǒng)總體電路圖 .................................................................................................. 13 3 系統(tǒng)軟件設(shè)計(jì) ................................................................................................................ 14 數(shù)據(jù)采集子程序 .................................................................................................. 14 火災(zāi)判斷程序 ...................................................................................................... 15 電話報(bào)警流程設(shè)計(jì) .............................................................................................. 15 MT8880 的數(shù)據(jù)發(fā)送程序設(shè)計(jì) ............................................................................ 17 MT8880 數(shù)據(jù)接收程序設(shè)計(jì) ................................................................................ 19 II 4 仿真與調(diào)試 .................................................................................................................... 21 結(jié)論 .................................................................................................................................... 23 參 考 文 獻(xiàn) ...................................................................................................................... 24 致 謝 ................................................................................................................................ 25 III 插圖索引 圖 1 報(bào)警電路方框圖 ....................................................................................................... 3 圖 2 AD590 應(yīng)用電路圖 .................................................................................................... 4 圖 3 TGS202 應(yīng)用電路圖 ................................................................................................... 4 圖 4 ISD1420 引腳 ............................................................................................................ 5 圖 5 AT89C51 引腳 ............................................................................................................ 7 圖 6 MT8880 接收電路連線圖