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1、摘要本設(shè)計(jì)主要論述了運(yùn)用PLC技術(shù)來控制復(fù)合化肥混合比例的生產(chǎn)線是將機(jī)電相結(jié)合的在生產(chǎn)領(lǐng)域的一個(gè)具有代表意義的控制系統(tǒng)。它涉及機(jī)械工程、電子技術(shù)、電力電子技術(shù)、電機(jī)與拖動(dòng)理論、自動(dòng)控制理論、電力拖動(dòng)控制技術(shù)等多個(gè)學(xué)科領(lǐng)域。隨著微電子技術(shù)和電子技術(shù)的發(fā)展完善,交流調(diào)速技術(shù)不斷發(fā)展,并日趨成熟。因此,在PLC對(duì)生產(chǎn)線控制的技術(shù)上,已經(jīng)呈現(xiàn)出用交流調(diào)速方式取代直流調(diào)速方式的趨勢(shì)。針對(duì)傳統(tǒng)的以傳感器微機(jī)式皮帶秤的基礎(chǔ)進(jìn)行改進(jìn),采用微機(jī)智能化皮帶秤。采用西門子S7系列PLC與速度傳感器及森蘭系列變頻器控制,采
2、用已趨成熟的交流變壓變頻(VVVF)調(diào)速方式,控制相同型號(hào)的三個(gè)皮帶秤實(shí)現(xiàn)以調(diào)速運(yùn)轉(zhuǎn)。測(cè)速傳感器將輸送帶的速度轉(zhuǎn)換成電信號(hào),再通過模擬模塊進(jìn)行A/D轉(zhuǎn)換,以V/F的調(diào)頻方式,通過PLC控制實(shí)現(xiàn)皮帶秤的自動(dòng)運(yùn)轉(zhuǎn)、自動(dòng)對(duì)傳感器信號(hào)的采集進(jìn)行積算、反饋,從而達(dá)到自動(dòng)調(diào)速的目的、其中還包括自動(dòng)控制混合器和運(yùn)輸機(jī)的自動(dòng)控制等功能。關(guān)鍵詞PLC配料混合調(diào)速AbstractThissystemexpoundmainlyhowtoapplyPLCtechnologytocontroltheproductivelin
3、eofcompoundfertilizer’sproportionalmixingisprovidedrepresentativecontrolsystemwhichcombinesmachineryandpower-generatingequipmentintheproductfield.Itreferstomanybranchoflearningfield.Suchasthemechanicalengineering、electronictechnology、electricpowertechn
4、ology、electricalmachineryanddragtheory、automatictheory、electricpowerdragcontroltechnology.Accompanythedevelopmentandimprovementofmicroelectronictechnology、electricstechnologyandalternatingspeedgovernortechnology.Itbecomesmaturemoreandmore.Consequently,
5、toapplythePLCtechnologytocontroltheproductiveline,itappearsthetreadthatthealternatingspeedgovernortechnologyreplacesthedirectspeedgovernortechnology.Thissystem’sdesignisthealternatingspeedgovernortechnology.Inconnectionwithtraditionalsensormicrocompute
6、rdrivingbelts,itisimprovedtothemicrocomputerintelligenceandabilitydrivingbelt.TousethePLCoftheS200series、velocitysensorandfrequencyconversioninstrumentofSenLanseries.TousethespeedgovernoroftheVVVFtocontrolthesametypedrivingbelts.Themonitorvelocitysenso
7、rtransformthebeltvelocitytotransformtheA/Dbytheimitationmoduletotheelectricsignal,thentousethePLCtechnologytocontroltheautomaticbeltdrive、toaccumulate、feedbackofthesensorsingletoachievetheautomaticspeedgovernor.Also,PLCtechnologycontrolsthemixturemachi
8、neandthetransportmachine.KeywordsPLCcompoundmaterialmixspeedgovernor目錄摘要IAbstractII第1章緒論11.1前言11.2選題背景11.3配料混合系統(tǒng)研究意義21.4配料混合系統(tǒng)的發(fā)展前景21.5本文的結(jié)構(gòu)4第2章配料混合系統(tǒng)機(jī)械執(zhí)行系統(tǒng)設(shè)計(jì)52.1設(shè)計(jì)方案52.2配料系統(tǒng)設(shè)計(jì)52.2.1結(jié)構(gòu)選擇52.2.2結(jié)構(gòu)設(shè)計(jì)92.2.3配料系統(tǒng)精度分析152.3混合系統(tǒng)設(shè)計(jì)162.3.1混合設(shè)備選擇16