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1、2013屆畢業(yè)設(shè)計(jì)(論文)設(shè)計(jì)題目:煤氣泄漏檢測(cè)系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)姓名:學(xué)號(hào):1402090211專業(yè):電子與信息工程指導(dǎo)教師:杜振龍2013-6-10摘要隨著科技的進(jìn)步和社會(huì)的發(fā)展,人們對(duì)生活質(zhì)量的要求越來(lái)越高。天然氣、煤氣等也已經(jīng)進(jìn)入人們的生活,它給人們帶來(lái)方便的同時(shí)也存在著一些潛在的危險(xiǎn)。每年我國(guó)因工廠或家庭煤氣泄露造成的損失不容忽視,所以對(duì)于有毒氣體的檢測(cè)和控制就更加重要。目前,已經(jīng)出現(xiàn)了很多的煤氣報(bào)警裝備,而這些產(chǎn)品大多是針對(duì)煤氣的泄漏所設(shè)計(jì)的為專業(yè)人員所用的報(bào)警器。有毒氣體的檢測(cè)多應(yīng)用
2、在加油站、燃?xì)庥脩?、管道油氣輸送、石油煉化等?chǎng)所,主要檢查天然氣、CO等氣體。本文所設(shè)計(jì)的煤氣檢測(cè)監(jiān)控系統(tǒng)主要由傳感器組、A/D轉(zhuǎn)換器、處理器、顯示器、報(bào)警器等模塊組成。本文的煤氣泄露檢測(cè)系統(tǒng)的設(shè)計(jì)方案是由傳感器采集的信號(hào)經(jīng)過模/數(shù)轉(zhuǎn)換器,轉(zhuǎn)換器除了把采集到的信號(hào)轉(zhuǎn)化為數(shù)字信號(hào)之外,還起到信號(hào)集中、放大等功能,處理器模塊由32位微處理器組成,轉(zhuǎn)換器傳進(jìn)的信號(hào)經(jīng)處理器程序分析、處理,驅(qū)動(dòng)液晶顯示、聲音報(bào)警等外設(shè),提示用戶煤氣是否泄漏。本文介紹了基于單片機(jī)的煤氣檢測(cè)系統(tǒng)的硬件設(shè)計(jì)和程序設(shè)計(jì),本系統(tǒng)選
3、擇MQ2煙霧傳感器為前端信號(hào)采集源,采用AT89C51單片機(jī)為微處理器,用TLC1549AD轉(zhuǎn)換芯片對(duì)氣體傳感器采集數(shù)據(jù),將模擬信號(hào)轉(zhuǎn)換為數(shù)字信號(hào),繼而單片機(jī)處理數(shù)據(jù),通過LCD1602液晶顯示屏顯示數(shù)據(jù)以及蜂鳴器的工作與否提醒用戶煤氣濃度是否超標(biāo)。實(shí)驗(yàn)測(cè)試結(jié)果表明本文設(shè)計(jì)的煤氣檢測(cè)系統(tǒng)能夠檢測(cè)出泄露的煤氣。關(guān)鍵字:傳感器;單片機(jī);TLC1549;LCD1602。AbstractWiththeadvancementofelectronictechnologyandthedevelopmentof
4、society,peopleareincreasinglydemandinghighqualityoflife.Naturalgasandcoalgashaveenteredpeoples’lives.Thereisalsosomepotentiallydangerinpractice,thoughitbringsconveniencetopeople.EveryyeartheaccidentcausedbytheleakofthegasinChinacannotbeignored,sothed
5、etectionandcontroloftoxicgasesisbecomingmoreandmoreimportant.Currently,therehavebeenalotofgasalarmequipments,mostoftheseproductsismadefortheleak’salarmofgas,andtheyaremainlyforfamily.Thedetectionofgasleakisgenerallyusedingasstations,familiesofgascons
6、uming,pipelinetransportofoilandgas,thefactoryofpetroleumrefining,andsoon.ItchecksordetectsmainlythegassuchasCH4,COandsoon.Thesystemofgasleakdetectioniscomposedbysensorgroups,A/Dconverter,processor,monitor,alarm.Theflowchartisthatthesignaliscollectedb
7、ythesensor,thenpassedtoA/Dconverter,andtheconverterhasalsothefunctionsofcollectingsignalsandenlarging.Themoduleisconsistedof32-bitmicroprocessor.Thesignalscollectedbytheconverterisanalyzedandhandledbytheprocessor,whichdrivesthedisplayofLCDandthealarm
8、ingofalarmsothatitreminduserwhetherthegasisoverthethreshold.ThisessayintroducestheprogramsofhardwaredesignandprogrammingofgasdetectionsystembasedonMCU.CQ2Smokesensoristheresearchobjectofthesystem,andthecoreofthesystemisAT89C51microprocessor.Thechipof