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1、家用可燃?xì)怏w報警器的設(shè)計學(xué)生：指導(dǎo)教師內(nèi)容摘要：本設(shè)計采用了GS系列的傳感器，將一定濃度的氣體轉(zhuǎn)換為電壓顯示,并通過ADC0809將電壓信號轉(zhuǎn)換為模擬信號，再交由AT89C51中進(jìn)行分析和處理。為了方便用戶能進(jìn)行直觀的了解，3位LED顯示器的靜態(tài)顯示接口是AT89C51外接3片74LS164，數(shù)據(jù)輸出線是該器件的RXD，移位時鐘脈沖為TXD。TTL單向8位移位寄存器是74LS164，最終可達(dá)到并行輸出,串行輸入，8位移位寄存器74LS164會將靜態(tài)顯示出來。在擬定警報預(yù)設(shè)值后，單片機控制音樂和閃光效果會體現(xiàn)出警報。單片機的操作了程控一氧化碳報警器的全部設(shè)置。著以程序?qū)σ谎趸嫉臐舛冗M(jìn)行24小
2、時不間斷監(jiān)控，當(dāng)有毒有害危險氣體超出了我們預(yù)定的危險值后，我們設(shè)計的電路便會自動進(jìn)行報警處理，電路此功能的實現(xiàn)是外接排風(fēng)扇與電磁閥相合作完成進(jìn)行的，為防不測。在程序正常運行的時候難免會出現(xiàn)程序系統(tǒng)陷入了死循環(huán)，面對這種情況的時候我們需要在程序陷入了死循環(huán)的時候利用X25045芯片組成的電路進(jìn)行復(fù)位,從而避免了斷開整個系統(tǒng)的連電，由此引薦電路得到了保護(hù)。單片機AT89C51是數(shù)字氣體報警器的主要應(yīng)用器件，性價比十分高。以此為設(shè)計核心展開對可燃?xì)怏w的泄漏的報警裝置的設(shè)計，接下來給出所有的設(shè)計原理與硬件電路和程序的設(shè)計。關(guān)鍵詞：氣體泄露報警器一氧化碳AT89C51單片機18Designforhou
3、seholdcombustiblegasalarmAbstract:The?design?of?the?GS?series?of?sensors,?will?be?placedon?the?test?environment?measured?the?concentration?of?gas?converted?to?analog?voltage,?and?then?through?the?ADC0809?will?be?converted?to?analog?voltage?digital?signal,?into?the?SCM?AT89C51?in?the?process.?To?use
4、rs?of?gas?concentrations?in?real-time?understanding,?AT89C51?will?be?linked?three?74?LS164?externally??as?the?three?LED?display?static?display?interface,?and?the?MCU?RXD?as?the?output?data?line,?TXD?as?a?shift?clock?pulse.?74LS164?TTL?is?a?one-way?8-bit?register?displacement?which?can?be?realized?e
5、nter?serial,?parallel?output,?through?the?8-bit?shift?register?74?LS164?can?be?static?display.?By?setting?the?alarm?level,?the?MCU?control?LED?and?music?IC?alarm?at?the?same?time.SCM?control?use?of?technology,?produced?a?program-controlled?carbon?monoxide?alarm.The?instrument?of?carbon?monoxide?(CO
6、)?for?real-time?monitoring,?when?the?concentration?of?carbon?monoxide??is?more?than?allowed?value,?the?control?circuit?for?alarm,?and?through?an?external?electromagnetic?valve?row?fans?and?their?program-controlled,?to?preventaccidents.?In?addition?procedures?to?prevent?a?cycle?of?death,?also?used?x
7、25045?watchdog?circuit?chip?composed?of?a?death?in?theprocess?so?that?when?the?MCU?reset?cycle,?instead?of?the?whole?system?off,?thereby?protecting?the?hardware?circuit.As?designed?by?the?number?of?gas?alar
