基于plc溫室溫度檢測與控制系統(tǒng)的設(shè)計(jì)-畢業(yè)論文

1、基于基于PLC溫室溫度檢測與控制系統(tǒng)的設(shè)計(jì)溫室溫度檢測與控制系統(tǒng)的設(shè)計(jì)摘要摘要：溫度檢測和控制對(duì)人類日常生活、工業(yè)生產(chǎn)、氣象預(yù)報(bào)、物資倉儲(chǔ)等都起著極其重要的作用。在許多場合，及時(shí)準(zhǔn)確獲得目標(biāo)的溫度信息是十分重要的，近年來，溫度測控領(lǐng)域發(fā)展迅速，并且隨著數(shù)字技術(shù)的發(fā)展，溫度的測控芯片也相應(yīng)的登上歷史的舞臺(tái)，能夠在工業(yè)、農(nóng)業(yè)等各領(lǐng)域中廣泛使用。本系統(tǒng)是通過溫度傳感器采集溫度數(shù)據(jù)，利用溫度測量與溫度控制相關(guān)理論知識(shí)設(shè)計(jì)的PLC溫控系統(tǒng)。運(yùn)用P

2、LC設(shè)計(jì)溫室溫度測控系統(tǒng)，從自動(dòng)化運(yùn)行的角度出發(fā)，分析討論其產(chǎn)生故障的可能原因。同時(shí)從實(shí)際硬件電路出發(fā)，分析電路的工作原理，根據(jù)設(shè)計(jì)具體情況提出修改方案和解決辦法。我所使用的溫度傳感器是XPTPAV010D，它具有體積小，精度高和功耗低等特點(diǎn)。溫度傳感器采集到的溫度數(shù)據(jù)是模擬信號(hào)，因此在系統(tǒng)中，我將PLC增加了一個(gè)模擬量擴(kuò)展模塊EM235采集到的溫度信號(hào)便能通過該模塊直接輸入到PLC中，PLC則對(duì)數(shù)據(jù)進(jìn)行分析、處理，并通過執(zhí)行部件對(duì)溫度

3、進(jìn)行控制，這種自動(dòng)化、智能化的處理方式在溫室溫度檢控系統(tǒng)中將有著無限的應(yīng)用和發(fā)展空間。關(guān)鍵字關(guān)鍵字：PLC，溫度傳感器，檢測控制DesignofdetectioncontrolsystemofgreenhousetemperaturebasedonPLCAbstract:Temperaturemeasurementcontrolplaysanextremelyimptantroleinhumandailylifeincludingind

4、ustrialproductionweatherfecastmaterialstageetc..Inmanycasesitisveryimptanttoacquirethetimelyaccurateinfmationofthetemperatureofthetargets.Recentlyalongwiththedevelopmentofdigitaltechnologytherapiddevelopmentoftemperature

5、measurementcontrolhasbeenwidelyusedinvariousindustrialagriculturalfieldsmeanwhilethechipsofmeasurementcontrolthetemperaturehavebeenonthehisticalstage.Thissystembycollectingtemperaturedatathroughthetemperaturesenswiththea

6、pplicationofPLCcontrolsystembasedonthetheeticalknowledgeabouttemperaturemeasurementcontrolintendstoanalyzethepotentialcausesofthebreakdownsintheirautomaticoperation.Atthesametimestartingfromthecircuitsofactualhardwarevia

7、analyzingoperatingprinciplesoftheseelectriccircuitsthissystemisaimingatputtingfwardtherevisingproposaslsolutionsaccdingtothespecificsituations.ThetemperaturesensusedbytheauthisXPTPAV010Dwhichisdistinguishedwithsmallsizeh

8、ighprecisionlowpowerconsumption.Thetemperaturedatacollectedbythetemperaturesensisananalogsignal.TherefeinthesystemananalogextendedmoduleofEM235.IwillbeaddedtothePLCsothattemperaturesignalcollectedby目錄目錄1.緒論..............

9、................................................12.系統(tǒng)總體設(shè)計(jì)方案..................................................22.1.總體方案....................................................22.2.系統(tǒng)硬件連接圖......................................

10、........43.可編程邏輯器件（PLC）.............................................53.1.PLC的定義...................................................53.2.PLC的分類...................................................53.3.PLC的基本結(jié)構(gòu)...............

11、................................53.4.PLC的工作原理..............................................63.5.PLC主要廠家及西門子S7—200................................74.溫度傳感器........................................................94.1.溫度傳感器的

12、分類............................................94.2.溫度變送器.................................................115.硬件設(shè)備與電路圖.................................................125.1.控制系統(tǒng)的IO點(diǎn)及地址分配.................................12

13、5.2.狀態(tài)燈、揚(yáng)聲器、暖風(fēng)機(jī)電路.................................135.3.溫度采集電路...............................................135.4.EM235模擬量輸入電路........................................146.主程序及梯形圖..........................................

14、.........156.1.主程序OB1..................................................156.2.子程序0，取實(shí)際溫度變量....................................197.結(jié)論.............................................................21致謝........................