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1、鄭州科技學(xué)院專(zhuān)科華業(yè)設(shè)計(jì)(論丈丿題冃家用煤氣監(jiān)測(cè)報(bào)警器學(xué)生姓名劉保良專(zhuān)業(yè)班級(jí)09電氣自動(dòng)化學(xué)號(hào)200726003所在系電氣工程系指導(dǎo)教師楊瑞完成時(shí)間年月日家用煤氣監(jiān)測(cè)報(bào)警器摘要當(dāng)今社會(huì)上,出現(xiàn)了許多煤氣報(bào)警器,而這些產(chǎn)品大都是針對(duì)煤氣的泄漏所做出的相應(yīng)的報(bào)警,即為家庭式。對(duì)這些原理和結(jié)構(gòu)我們就需要很好的了解并掌握。系統(tǒng)由單片機(jī),煤氣氣體檢測(cè)傳感器,A/D轉(zhuǎn)換電路,LED顯示電路,報(bào)警電路等組成。單片機(jī)選用AT89C51,LED燈由一個(gè)紅燈一個(gè)綠燈組成,正常工作時(shí),綠燈亮,表示系統(tǒng)開(kāi)機(jī)且止常工作;當(dāng)空氣中的煤氣氣體濃度到達(dá)
2、危險(xiǎn)值時(shí),紅燈亮,同時(shí)檢測(cè)電路向單片機(jī)發(fā)送信號(hào),單片機(jī)經(jīng)過(guò)數(shù)據(jù)的處理和判斷,控制顯示電路和報(bào)警電路工作,以此來(lái)確保室內(nèi)人員能立即得到警報(bào)。通過(guò)單片機(jī)89C51系統(tǒng)設(shè)計(jì)實(shí)現(xiàn)對(duì)家用煤氣的控制功能,由煤氣傳感器對(duì)煤氣進(jìn)行檢測(cè),將所得的濃度值與設(shè)定濃度值相比較得到偏差。通過(guò)對(duì)偏差信號(hào)的處理獲得控制信號(hào),去調(diào)節(jié)煤氣出氣閥的通斷,四個(gè)單元的煤氣濃度對(duì)應(yīng)模擬量利用A/D轉(zhuǎn)換為數(shù)字量,并加入了鍵盤(pán)輸入,從而實(shí)現(xiàn)對(duì)家用煤氣漏氣的控制。整個(gè)系統(tǒng)的硬件電路設(shè)計(jì)合理,性能安全可靠。關(guān)鍵詞電位器釆樣/報(bào)警臨界值/煤氣濃度HOUSEholdGASM
3、ONITORINGALARMABSTRACTNowadays,therearemanygasalarm,andtheseproductsaremostlyagainstgasleakagethecorrespondingalarm,itisfamily.Butwiththedevelopmentofsociety,butalsointhedevelopmentofgasalarm.Theprincipleandthestructureweneedverygoodunderstandingandmaster.Thesyst
4、emiscomposedofasinglechipcomputer,gassensor,A/Dconversioncircuit,LEDdisplaycircuit,alarmcircuit,etc..SinglechipusingAT89C51,LEDlampconsistsofaredlightgreenlight,wheninnormalwork,thegreenlight,saidsystemstartingandnormalwork;whentheairinthegasconcentrationreachesa
5、dangerousvalue,theredlightdetectioncircuit,andasinglesignal,MCUthroughdataprocessingandjudgment,controldisplaycircuitandthealarmcircuit,inordertoensureindoorpersonnelcanimmediatelyalarm?Throughthesingle-chip89C51systemdesignandimplementationofahouseholdgascontrol
6、functionsbygassensor,gasdetection,theconcentrationandthesetconcentrationcomparedtothevaluereceiveddeviation.Deviationthroughthesignalprocessingcontrolsignal,toregulatethegasoutletvalveon-off,fourunitsofgasconcentrationcorrespondingtoanalogusingA/Dconversiontodigi
7、talquantity,andjoinedthekeyboardinput,thusrealizingthedomesticgasleakagecontrol.Thehardwarecircuitofthewholesystemisreasonableindesign,safeandreliableperformance.KEYWORDSPotentiometersamplingwarningcriticalvalueofgasconcentration1緒論1.1課題研究的背景隨著我國(guó)燃?xì)獾淖兏锛拔鳉鈻|輸工程的進(jìn)行,煤
8、氣或天燃?xì)庖殉蔀槎鄶?shù)家庭的燃料。每年,因煤氣泄霜造成的煤氣中毒事故中,因使用熱水器不當(dāng)或產(chǎn)品本身的質(zhì)量問(wèn)題,造成的煤氣屮毒事故,全國(guó)均有不少事例。有甚者,因室內(nèi)煤氣濃度過(guò)高,引起煤氣爆炸的事故也不少見(jiàn)。家用煤氣冇時(shí)會(huì)因各種原因發(fā)生泄漏,煤氣的主要成分是甲烷,甲烷是一種可燃性氣體,遇到明火會(huì)發(fā)生燃燒甚至爆炸,所以如果在