【正文】 ...............6 2 系統(tǒng)的組成及其原理 ......................................................................................................... 7 系統(tǒng)組成 .........................................................................................................................7 系統(tǒng)工作原理 .................................................................................................................7 3 硬件系統(tǒng)設(shè)計 ..................................................................................................................... 9 主機(jī)單元電路 .................................................................................................................9 STC89C52 單片機(jī) ....................................................................................................9 晶振電路及復(fù)位電路 ............................................................................................ 11 電源電路 ................................................................................................................ 11 功能實現(xiàn)模塊部分 ....................................................................................................... 12 ADC0804 信號采集及數(shù)據(jù)轉(zhuǎn)換單元 .................................................................... 12 LCD1602 液晶顯示模塊 ........................................................................................ 14 聲光報警模塊 ........................................................................................................ 15 傳感器的選用 ............................................................................................................... 16 MQ5 半導(dǎo)體氣體傳感器 ....................................................................................... 17 MQ5 氣體傳感器規(guī)格 ........................................................................................... 19 4 軟件設(shè)計 ........................................................................................................................... 20 可燃性氣體報警控制器軟件流程及設(shè)計 ................................................................... 20 主程序流程圖及設(shè)計 ................................................................................................... 20 T0 中斷子程序 ........................................................................................................ 21 顯示子程序設(shè)計 .................................................................................................... 23 5 系統(tǒng)調(diào)試 ........................................................................................................................... 24 硬件的調(diào)試 ................................................................................................................... 24 排除邏輯故障 ........................................................................................................ 24 排除元器件故障 .................................................................................................... 24 排除電源故障 ........................................................................................................ 24 軟件調(diào)試 ....................................................................................................................... 24 軟、硬件整體調(diào)試 ....................................................................................................... 25 小結(jié) ............................................................................................................................... 25 參考文獻(xiàn) ............................................................................................................................... 26 附錄 ....................................................................................................................................... 27 可燃性氣體泄漏報警控制器的設(shè)計 4 1 程序清單 ......................................................................................................................... 27 2 系統(tǒng)電路圖 ..................................................................................................................... 33 3 實物圖 ............................................................................................................................. 34 4 元件清單 ......................................................................................................................... 35 致謝 ....................................................................................................................................... 36 可燃性氣體泄漏報警控制器的設(shè)計 5 1 緒論 引言 燃?xì)庑孤﹫缶魇欠浅Ｖ匾娜細(xì)獍踩O(shè)備，由單片機(jī)、氣敏感測器、氣體濃度顯示器、報警器組成。leakage。 關(guān)鍵詞： STC89C52 單片機(jī)；可燃性氣體； 泄漏； 報警； 控制器 可燃性氣體泄漏報警控制器的設(shè)計 2 Abstract This graduation paper introduces the design of a alarm controller about the leakage of flammable gas based on STC89C52 chip microputer .The controller consists of five major ponents： STC89C52 chip microputer， power circuit , the AD data conversion circuit（ the ADC0804 conversion circuit） , LCD displayer（ 1602 display circuit ） ， light and sound alarm circuit. It uses semiconductor ceramic type gas sensor MQ5 to detect a variety of concentrations of flammable gases in the air, especially alkane gases, bined with external hardware circuit implementation of bustible gas alarm control on the device. The software part used the C language to device has simple operation,practical,cheap,intelligent a