plc電梯控制英文文獻(xiàn)五千字翻譯適用于本科畢業(yè)設(shè)計(jì)

plc電梯控制英文文獻(xiàn)五千字翻譯(適用于本科畢業(yè)設(shè)計(jì)篇一：本科畢業(yè)設(shè)計(jì)文獻(xiàn)翻譯

中文翻譯

2．1理想蜂窩小區(qū)的覆蓋范圍

根據(jù)標(biāo)準(zhǔn)傳播模型SPM，各個(gè)地區(qū)針對不同的無線信號頻段分別進(jìn)展傳播模型校正，得到較適宜該地區(qū)該頻段的傳播模型：

d表示接收機(jī)與基站間的間隔；HTx為發(fā)射機(jī)高度；HRx為接收機(jī)高度；DiffLoss表示散射造成的途徑損耗；f(clutter)表示各個(gè)clutter損耗的加權(quán)平均，表示為Kc。

通常情況下，一個(gè)區(qū)域內(nèi)的挪動終端接收電平在-85dBm以上，可以認(rèn)為該區(qū)域有較良好的無線網(wǎng)絡(luò)覆蓋。因此蜂窩基站小區(qū)覆蓋邊界處的接收電平為-85dBm、平均天線口發(fā)射

功率51dBm來推算理論覆蓋范圍。

2．2GSM理論網(wǎng)絡(luò)容量與載干比C/I間的計(jì)算方法

載干比C/I通常被用來衡量GSM網(wǎng)絡(luò)的挪動通話質(zhì)量假設(shè)使用MRP〔多重頻率復(fù)用方式〕來進(jìn)展頻率規(guī)劃的話，那么理論計(jì)算規(guī)劃可實(shí)現(xiàn)的C/I，可以應(yīng)用以下的公式大致推算出：

其中a表示傳播模型中的途徑損耗斜率；D表示相鄰2個(gè)小區(qū)群中位置相對應(yīng)的2個(gè)小區(qū)中心之間的間隔，即最近同頻小區(qū)間隔，也稱為頻率復(fù)用間隔；R為小區(qū)六邊形外接圓半徑，即小區(qū)覆蓋半徑；Ki為傳播條件、天線方向去耦、天線下傾等因素的綜合修正因子〔建議取值范圍為-5~0〕。針對一個(gè)地區(qū)詳細(xì)的網(wǎng)絡(luò)a和Ki為相對固定的值。

2．3GSM系統(tǒng)網(wǎng)絡(luò)容量與無線通話質(zhì)量間的關(guān)系

GSM網(wǎng)絡(luò)無線通話質(zhì)量的主要衡量標(biāo)準(zhǔn)為載干比C/I，當(dāng)一塊區(qū)域的GSM網(wǎng)絡(luò)載干比C/I>9dB時(shí)，可以認(rèn)為該區(qū)域擁有較好無線通話質(zhì)量。從章節(jié)2.2中的公式中得到推論，在一個(gè)確定的無線環(huán)境中，蜂窩小區(qū)連續(xù)均勻覆蓋，即小區(qū)的覆蓋間隔為定值，假設(shè)載干比C/I值恒定，那么GSM理論網(wǎng)絡(luò)容量與可用載頻數(shù)成正比。假設(shè)GSM理論網(wǎng)絡(luò)容量恒定，那么載干比C/I值與可用載頻數(shù)成正比。

3．2MONBCCH技術(shù)

MONBCCH是雙頻共BTS的一種方式，利用DCS1800M的無線頻率資源來補(bǔ)充GSM900M的單蜂窩扇區(qū)的載頻數(shù)，從而實(shí)現(xiàn)容量上的增加。

開啟雙頻標(biāo)準(zhǔn)小區(qū)功能有以下幾方面特點(diǎn)：

〔1〕要求合理設(shè)計(jì)覆蓋，使得同一扇區(qū)區(qū)內(nèi)的不同載頻有一樣的覆蓋；

〔2〕BCCH可以分配于任何一個(gè)頻段，而不局限于低頻段，單頻只能接入到支持BCCH頻段的載頻上；

〔3〕由動態(tài)分配原那么，語音或數(shù)據(jù)業(yè)務(wù)是被動態(tài)分配信道的，因此可以做到雙頻話務(wù)的自動平衡，而不像從前需通

過參數(shù)設(shè)置實(shí)現(xiàn)；

〔4〕GPRS或EDGE業(yè)務(wù)可以在兩個(gè)頻段上被同時(shí)分配，運(yùn)營商可以簡單通過業(yè)務(wù)層的設(shè)定允許非BCCH頻段上的數(shù)據(jù)業(yè)務(wù)應(yīng)用；

〔5〕不支持兩個(gè)頻段間的跳頻；

〔6〕從AMR-FR到AMR-HR的切換可以在不同的頻段內(nèi)分別開啟或關(guān)閉；總而言之，開啟共BCCH雙頻標(biāo)準(zhǔn)扇區(qū)功能使GSM900M和DCS1800M的載頻在同一個(gè)扇區(qū)內(nèi)工作，可以自然地實(shí)現(xiàn)雙頻話務(wù)平衡，提升了網(wǎng)絡(luò)資源的利用率；同時(shí)，它只需設(shè)置一個(gè)頻段的BCCH，為保持總配置不變可增加一個(gè)另頻段的TCH載頻，應(yīng)對網(wǎng)絡(luò)容量的增長需求。

在某GSM蜂窩基站中嘗試使用MONBCCH技術(shù)，在GSM900M的蜂窩小區(qū)中增加DCS1800M的載頻，將原先基站配置從7/7/6提升至16/14/11，其中GSM900M的頻點(diǎn)數(shù)為

7/7/6，DCS1800M的頻點(diǎn)數(shù)為9/7/5。

通過使用MONBCCH技術(shù)，GSM蜂窩基站的可用載頻數(shù)大幅擴(kuò)大，基站容量得到了提升。開啟MONBCCH后該蜂窩小區(qū)的接通率、掉話率和切換成功率指標(biāo)沒有變化，接收電平指標(biāo)有所進(jìn)步，而語音質(zhì)量指標(biāo)差異變化不明顯，因此使用MONBCCH技術(shù)的GSM蜂窩基站維持了較好的無線通話質(zhì)量。

但是MONBCCH的開啟對雙頻小區(qū)有覆蓋一致的嚴(yán)格要求，在檢測到好的主頻信號卻占上較弱的TCH信道，就可能引起切換和TCH分配成功率的下降，這對于室內(nèi)通話情況，因?yàn)镈CS1800信號的穿透損耗大，就變得更為明顯。

MichelMoulyandMavie-BernadeetePauter：TheGSMSystemforMobilemunications.

英文原文：

2.1IdealCellularcoverage

AccordingtopropagationmodelbasedonstandardSPM,variousregionsoftheradiosignalsofdifferentfrequenciescorrectthespreadmodel,whicharemoresuitedtotheareaofthebandpropagationmodel:

disthedistancebetweenreceiverandbasestation;HTxisthetransmitterheight;HRxisthereceiverheight;DiffLossisscatteringcausedbythepathloss;f(clutter)istheweightedaverageofallclutterloss,expressedasKc.

Typically,aregionofthemobileterminalreceivinglevelabovemorethan-85dBmcanbeconsideredgoodatwirelessnetworkcoverage.

2.2calculatedwaysbetweenGSMnetworkcapacityandcarrier-to-interferenceratioC/I

CarriertointerferenceC/IisoftenusedtomeasurethequalityofGSMnetworkmobilecalls.IfuseMRP(multi-frequencyreusemethod)tocarryoutfrequencyplanning,planningcanbecalculatedtoachievetheC/I,thefollowingformulacanbeappliedtobroadlycalculate:

aisthepathlossslopofpropagationmodel;Disthedistancebetweenthecentersoftwoneighboringcellgroups,whichthemostclosestdistancebetweenthesamefrequencydistrict,alsoknownasfrequencyreusedistance;Risradiussemi-hexagonalcircumcircle,thatcellcoverageradius;Kiisconditionsforthespread,thedirectionofdecouplingtheantenna,antennatiltandotherfactorsundertheprehensivecorrectionfactor(remendedvaluesrangefrom-5to0).

3.2MONBCCHTechnology

MONBCCHfrequencyofBTSisawayofusingDCS1800MofradiofrequencyresourcestosupplementGSM900Msingle-carrierfrequencyofthecellularsectorinordertoachievetheincreaseoncapacity.

Openingcellfunctionsofthedualstandardobtainsthefollowingfeatures:

(1)requesttherationaldesignofcover,makingdifferentfrequencyareasinthesamesectorcoveredbythesamecarrier;

(2)BCCHcanbeassignedtoanyoneband,butnotlimitedtolowfrequency,single-bandmobilephonecanonlyaccesstothesupportofBCCHcarrierfrequencyband;

(3)Accordingtothedynamicdistributionprinciple,voiceordataservicesaredynamicallyallocatedchannel.Thereforeitcanauto-balancedual-band,ratherthanbeforeneedparametersettings;

(4)GPRSorEDGEservicescanbeassignedintwofrequencybandsatthesametime,operatorscansimplysetinthebusinesslayertoallownon-BCCHbanddataservicesontheapplication;

(5)Donotsupportfrequencyhoppingbetweentwobands;

(6)SwitchingfromtheAMR-FRtoAMR-HRcanbeopenorclosedindifferentbands,

Allinall,openstandardsforatotalofBCCHdualbandsectorallowsGSM900MandDCS1800Mworkinthesamesector,whichcannaturallyrealizethebalanceofthedualserviceandenhancetheutilizationofnetworkresources;atthesametime,itjustsettingonebandofBCCH.,inordertomaintainthesameoverallconfiguration,itincreaseTCHcarrierfrequencyoftheotherbandstoaddressgrowingdemandfornetworkcapacity.

InaGSMcellularbasestation,theattempttousetheMONBCCHtechnologyaddDCS1800MfrequencyinGSM900Mcellulardistrict,andupgradetheoriginalbasestationconfigurationfrom7/7/6to16/14/11,whenpointstothefrequencyofGSM900Mis7/7/6,9/7/5forDCS1800Mfrequencypoints.

ThroughtheuseofMONBCCHTechnology,thenumberofthecarrierfrequencyofGSMcellularbasestationscanbesignificantlyexpanded,andbasestationcapacityhasbeenimproved.AfteropeningMONBCCH,theCellular'sswitchrate,dropcallrateandindicatorsofthesuccessrateofswitchinghavenochange,theindicatorlevelofreceiverincreasing,whilethedifferenceinvoicequalityindicatorsdidnotchangesignificantly,sotheuseofMONBCCHtechnologymakesGSMcellularbasestationtomaintaingoodwirelesscallquality.

ButMONBCCH'sopenhasstrictrequirementsonthesamefrequencycoverageofdualarea.becausegoodfrequencyaccountingfortheweakerTCHchannelmaycauseswitchanddeclineofTCHallocationsuccessrate.Ifthesituationcallsforindoorsituation,becausetheDCS1800signalsthroughlossislarge,itbeesmoreevident.

篇二：PLC建筑電梯控制系統(tǒng)中英文外文翻譯文獻(xiàn)

(文檔含英文原文和中文翻譯)

中英文資料翻譯

ApplicationofPLCintheElevatorControlSystemof

IntelligenceBuilding

Abstract:Thepapermainlydiscussesonesubsystemofintelligencebuildingsystem:theelevatorcontrolsystem.ThePLCstrongabilityininterferenceandsoonmakestheelevatorindustryoneafteranothertoapplythePLCtotheelevatorcontrolsysteminordertoreplacetherelaybeingusedintraditionalelevatorcontrolsystem.TheApplicationofPLCintheElevatorcontrolsystemreducesthebreakdownrateandefficientlyimprovestheoperatingreliabilityoftheelevatorwithsafety.Thestructureofsystemisalsosimpleandtightlypacked.Theworkingprincipleoftheelevatorcontrolsystemis:ThespotcontrolinformationissendintotheＰＬＣfromthe

customerinputdevicesfirstly,thenthePLCcontrolcabinetisrequiredtosendoutthecontrolsignaltodrivetheequipmentsaccordingtothesystemdemands.Theelevatorcanthenproceedthehomologousactionaccordingtothecontrolrequest.ThepaperselectsＯＭＲＯＮpany’sＣ200HEseriesPLC,introducingpartsofsignalhookupoftheelevatorcontrolsystemandexplainingthefunctionofthecontrolcabinet.Lastlytheautomationprogrammingisintroduced.Simulatedexperimentsenunciatesthatthedesignmethodisviable.Itcanmakethepersonneloftheindustrymanagementcentertolong-distancemonitorandcontroltheelevatorincontrolcenter,toconnecttheelevatorcontrolsystemwithintelligencebuildingindustrymanagementsystembyEthernetorspecial-purposenetworksuchasLonWorks.Theelevatorworkingstatecanalsobetimelywatched.Thesenotonlycanrealizescientificcentralizedmanagementoftheelevator,butalsocanlowertheelevatormaintenancecostetc.Itisoneofthedevelopingdirectionofintelligencebuildingelevatorcontrolsystem.

Keywords:PLC;intelligencebuilding;elevatorcontrolsystem;workingprinciple;programdesign

Ⅰ.Introduction

In1980sThefirstintelligencemansionhadbeenpletedinAmerica,thenintelligencebuildinghasbeenabroadlytakenattentionsbythewholeworld.Theconceptofintelligencebuildinghasbeenputdifferentmeaningsalongwiththedevelopmentofsociety.Theearlystageintelligencebuildinghadbeenthoughtthatitisequaltotheintelligentmansion,butnowtheintelligencebuildingnotonlyincludestheintelligencemansionsbutalsoinvolvesintelligenceresidentialdistricts.Thispapermainlydiscussesonesubsystemofintelligencebuildingsystem:theelevatorcontrolsystem.

Inintelligenceresidentialdistrictstheenterprise’sinformationmanagingsystemmainlytakeschargeofthethingswhichrelatedtothedailylife,forexamplesupervisingthedistrictequipments,managingvehicles,disposingcriticalsituationsandsoon.Theelevatorsupervisingandcontrolsystemisalsonecessarytothe

intelligenceresidentialdistricts.Howtomakepeoplefeelsafe,stableandfortableandhowtosaveenergyresourcesandprotectenvironmentsandsoonarethebasicrequirementstotheelevatorcontrolsystem.

PLCisamonindustrycontroldevice.Itisaspecialindustrycontrolputerwhichhastheperfectfunctionandsimpleframe.ThePLCstrongabilityininterferenceandsoonmakestheelevatorindustryoneafteranothertoapplythePLCtotheelevatorcontrolsystem,inordertoreplacetherelaybeingusedintraditionalelevatorcontrolsystem.TheApplicationofPLCintheelevatorcontrolsystemreducesthebreakdownrateandefficientlyimprovestheoperatingreliabilityoftheelevatorwithsafety.Thispapermainlydiscussestheelevatorcontrolsystem’sworkingprinciples,thesystem’ssoftwareandhardwarerealizationmethodsandsoon.

Ⅱ.TheWorkingPrincipleofElevatorControlSystem

InFig.1theHardwareStructureGraphofElevatorControlSystemispresented.

Fig.1TheHardwareStructureGraphofElevatorControlSystem

TheWorkingPrinciplesofElevatorControlSystemarestatedasfollows:ThespotcontrolinformationissendintothePLCfromthecustomerinputdevicesfirstly,thenthePLCcontrolcabinetisrequiredtosendoutthecontrolsignaltodrivetheequipmentsaccordingtothesystemdemands.Theelevatorcanthenperformthehomologousactionaccordingtothecontrolrequest.Therearevelocityfeedbackdevicesinsystem,whichadoptmeasurevelocitygeneratorstoprovidetheelevator

velocitiesandgenerallyareinstalledinthetailoftowmotors.Sothisisafeedbackcontrolsystem,whichcanimprovethesystem’scontrolprecision.

Ⅲ.TheHardwareConfigurationofControlSystem

Itisnotnecessarytodointerfacecircuitintheelevator’sPLCcontrolsystem.WhatweshoulddoistosendthesignalstoPLCdigitalinputterminals.Thesignalsincludeinsideandoutsidecallingsignals,floorlocationinspectingsignals,limitinglocationsignals,openingandshutdowntheelevatordoorsignalsetc.TheDCpowerwhichisprovidedtoPLCcanbeusedasindicatorlightpower.ThePLCoutputpointscanbedirectlyusedtocontroltransducersforthepurposeofelectricalmotor’spositiveturnandreverse,stopandcontroleachsegmentvelocityandsoon.ＯＭＲＯＮpany’sＣ200HEseriesPLChasbeenselectedasmajorcontrolconfigurationaccordingtotheinput/outputpointsandthelengthofuser’sprogram.Ontheotherhandwealsoconsiderthatthesystem’sfunctioncanbeexpandedinthefuture.Ｃ200HEseriesPLC,whoseperfectfunctionandstrongreliability,canmeetthesedemandsatpresent.

Moreover,inputandoutputdevicesareneededinelevatorcontrolsystem,besidesthePLC,system’smajorcontroldevice.

PartofsignalhookupsoftheelevatorelectriccontrolsystemisshowninFig.2.Thecontrolcabinetisthecontrolcenter,fromwhichwecansendoutvariouscontrolmands.Thecontrolcabinetoftenwasinstalledintheelevatorroom.Theelectricdevicesandsignalsystems,forexamplethecontactors,relays,capacitances,resistors,rectifiersandtransformersetc.,arecentralizedinthecontrolcabinet.ThePowerofthecontrolcabinetwasimportedfromthechiefpoweroftheelevatorroom.Thispowerwasalsointroducedintocontrolpanelbysoftcablesandwaslinkedwitheachcontrolbuttons.Thepowerlineswhichwasderivedfromcontrolcabinetwasdeliveredtotowelectricmotors.Otherscontrollinesandsignallineswereseparatelysenttoeachfloorjunction

Ⅳ.Programdesign

Thedesignincludestwoparts:hardwareandsoftware.Thehardwaredesignisthebaseofsoftware.Consideringthatthecontroldemandsarerelativelyplex,wedesigntheprogramsseparatelyaccordingtothecontrolfunction.Furthermore,wefollowtheprincipleasfollows:Whentheelevatorisascending,theascendingdemandsarepriortootherdemands;Whentheelevatorisdescending,thedescendingdemandsarepriortootherdemands.TheSequentialFunctionChart(SFC)isadoptedduringtheboxestoformelevator’sexecutivecircuitrydesign.Itisamethodspeciallyusedinindustrialsequentialcontrol.TheSFCmethodcandescribethesystem’sworkingprocedureingreatdetail.Forexamplethereisathreelayersintelligencebuilding.Asubprogram,thecallingfromthethirdflooraselevatorinthefirstfloor,isshowninFig.3withSFC.

篇三：PLC畢業(yè)設(shè)計(jì)相關(guān)英文文獻(xiàn)翻譯

翻譯對應(yīng)文章IntroductiontodigitaltemperaturesensorDS1820

數(shù)字溫度傳感器DS1820的介紹

特性：

·獨(dú)特的單線接口，只需1個(gè)接口引腳即可通信；

·多點(diǎn)〔multidrop〕才能使分布式溫度檢測應(yīng)用得以簡化；

·不需要外部元件；

·可用數(shù)據(jù)線供電；

·不需備份電源；

·測量范圍從-55至+125℃，增量值為0.5℃。等效的華氏溫度范圍是-67F至257F，增量值為0.9F；

·以9位數(shù)字值方式讀出溫度；

·在1秒〔典型值〕內(nèi)把溫度變換為數(shù)字；

·用戶可定義的，非易失性的溫度告警設(shè)置；

·告警搜索命令識別和尋址溫度在編定的極限之外的器件〔溫度告警情況〕；·應(yīng)用范圍包括恒溫控制，工業(yè)系統(tǒng)，消費(fèi)類產(chǎn)品，溫度計(jì)或任何熱敏系統(tǒng)。

詳細(xì)說明

DS1820有三個(gè)主要的數(shù)據(jù)部件：1〕64位激光laseredROM；2〕溫度靈敏元件，和3〕非易失性溫度告警觸發(fā)器TH和TL。器件從單線的通信線獲得其電源，在信號線為高電平的時(shí)間周期內(nèi)，把能量貯存在內(nèi)部的電容器中，在單信號線為低電平的時(shí)間期內(nèi)斷開此電源，直到信號線變?yōu)楦唠娖街匦陆由霞纳搽娙荨畴娫礊橹?。作為另一種可供選擇的方法，DS1820也可以用外部5V電源供電。與DS1820的通信經(jīng)過一個(gè)單線接口。在單線接口情況下，在ROM操作未定建立之前不能使用存貯器和控制操作。主機(jī)必須首先提供五種ROM操作命令之一；

1〕ReadROM(讀ROM)；

2)MatchROM(符合ROM)；

3)SearchROM(搜索ROM)；

4)SkipROM(跳過ROM)；

5〕AlarmSearch(告警搜索)；

這些命令對每一器件的64位激光ROM局部進(jìn)展操作，假設(shè)在單線上有許多器件，那么可以挑選出一個(gè)特定的器件，并給總線上的主機(jī)指示存在多少器件及其類型。在成功地執(zhí)行了ROM操作序列之后，可使用存貯器和控制操作，然后主機(jī)可以提供六種存貯器和控制操作命令之一。

一個(gè)控制操作命令指示DS1820完成溫度測量。該測量的結(jié)果將放入DS1820的高速暫存〔便箋式〕存貯器〔Scratchpadmemory〕，通過發(fā)出讀暫存存儲器內(nèi)容的存儲器操作命令可以讀出此結(jié)果。每一溫度告警觸發(fā)器TH和TL構(gòu)成一個(gè)字節(jié)的EEPROM。假設(shè)不對DS1820施加告警搜索命令，這些存放器可用作通用用戶存儲器使用存儲器，操作命令可以寫TH和TL對這些存放器的讀訪問。所有數(shù)據(jù)均以最低有效位在前的方式被讀寫。

寄生電源

方框圖(圖1)示出寄生電源電路。當(dāng)I/O或VDD引腳為高電平時(shí)，這個(gè)電路便“取〞得電源。只要符合指定的定時(shí)和電壓要求，I/O將提供足夠的功率〔標(biāo)題為“單總線系統(tǒng)〞一節(jié)〕。寄生電源的優(yōu)點(diǎn)是雙重的：

1〕利用此引腳，遠(yuǎn)程溫度檢測無需本地電源；

2〕缺少正常電源條件下也可以讀ROM；

為了使DS1820能完成準(zhǔn)確的溫度變換，當(dāng)溫度變換發(fā)生時(shí)，I/O線上必須提供足夠的功率。因?yàn)镈S1820的工作電流高達(dá)1mA，5K的上拉電阻將使I/O線沒有足夠的驅(qū)動才能。假設(shè)幾個(gè)SD1820在同一條I/O線上而且同時(shí)變換，那么這一問題將變得特別鋒利。

有兩種方法確保DS1820在其有效變換期內(nèi)得到足夠的電源電流。第一種方法是發(fā)生溫度變換時(shí)，在I/O線上提供一強(qiáng)的上拉。如圖2所示，通過使用一個(gè)MOSFET把I/O線直接拉到電源可到達(dá)這一點(diǎn)。當(dāng)使用寄生電源方式時(shí)VDD引腳必須連接到地。

向DS1820供電的另外一種方法是通過使用連接到VDD引腳的外部電源，如圖3所示這種方法的優(yōu)點(diǎn)是在I/O線上不要求強(qiáng)的上拉?？偩€上主機(jī)不需向上連接便在溫度變換期間使線保持高電平。這就允許在變換時(shí)間內(nèi)其它數(shù)據(jù)在單線上傳送。此外，在單線總線上可以放置任何數(shù)目的DS1820，而且假設(shè)它們都使用外部電源，那么通過發(fā)出跳過〔Skip〕ROM命令和接著發(fā)出變換〔Convert〕T命令，可以同時(shí)完成溫度變換。注意只要外部