資源描述：
《自動(dòng)定量稱重控制儀》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、摘要摘要我國的自動(dòng)定量稱重衡器需求量很大,但自動(dòng)定量稱重控制儀表技術(shù)卻相對(duì)落后。為此，本文研制了一種自動(dòng)定量稱重控制儀，該定量稱重控制儀具有控制準(zhǔn)確度高、功能實(shí)用以及性能穩(wěn)定可靠等特點(diǎn)。本控制儀屬于單片機(jī)嵌入式系統(tǒng)，采用STC90C51RC/RD作為系統(tǒng)的MCU單元。所設(shè)計(jì)的硬件電路單元主要包括：信號(hào)調(diào)理電路、數(shù)據(jù)采集電路、顯示和鍵盤電路、系統(tǒng)輸入和輸出電路、系統(tǒng)電源電路及電源監(jiān)控電路等。選用了靈敏度高、性能穩(wěn)定的電阻應(yīng)變式稱重傳感器及△-∑型24位高分辨率模數(shù)轉(zhuǎn)換處理芯片ADS1251，保證了系統(tǒng)的測(cè)量精度和準(zhǔn)確度。通過編制系統(tǒng)的軟件程序，實(shí)現(xiàn)了三級(jí)給料定量稱重過程的自動(dòng)控
2、制、提前量數(shù)據(jù)的自行修正、包裝數(shù)據(jù)的自動(dòng)保存以及鍵盤操作和實(shí)時(shí)顯示等多項(xiàng)實(shí)用功能。在對(duì)研制工作進(jìn)行總結(jié)的同時(shí)，對(duì)系統(tǒng)未來的改進(jìn)與完善提出了若干建議和設(shè)想。關(guān)鍵詞：定量稱重；單片機(jī)；自動(dòng)控制IAbstractIIAbstractAbstractThedemandforautomaticquantitativeweighingapparatusinourcountryisquitelarge,buttheautomaticquantitativeweighingcontrolinstrumenttechnologyofourcountryisstillrelativelybehi
3、ndthetimes.Soaquantitativeweighingcontrolinstrumentisdevelopedinthisdissertation,andithasthecharacteristicsofhighcontrolaccuracy,practicalfunctionsandstableandreliableperformanceetc.Thisinstrumentcanbeclassifiedintoembeddedmicro-controllersystem,andthemicro-controllerunitemployedinthissyste
4、misSTC90C51RC/RD.Thehardwarecircuitsdesignedinclude：signalconditioningcircuit,dataacquisitioncircuit,displayandkeyboardcircuit,systeminputandoutputcircuit,systempowersupplyandmonitoringcircuitetc.Toensuretheprecisionandaccuracyofthesystem,theresistancestrainmetertypeloadcellthatisofhighsens
5、itivityandstableperformanceand△一∑type24bitshighresolutionanalog-digitalconvertingchipADS1251areselected.Byprogrammingthesoftwareofthesystem,severalpracticalfunctions,suchastheautomaticcontrolofthree-stagefeedingquantitativeweighingprocess,automaticcorrectionofclosingleaddata,automaticstorag
6、eofpackagedata,keyboardoperationandreal-timedisplayetc,areaccomplishedbytheinstrument.Whilesummarizingtheresearchwork,somesuggestionsandtentativeplansonthefuturisticinnovationandimprovementofthisinstrumentareproposed.Keywords:QuantitativeWeighing；Micro-controller；AutomaticControlII目錄目錄目錄摘要I
7、ABSTRACTII1緒論11.1自動(dòng)定量衡器技術(shù)綜述11.1.1電子衡器的分類11.1.2自動(dòng)定量衡器技術(shù)國內(nèi)外發(fā)展概況21.2研究本課題的意義31.3本論文完成的主要工作42系統(tǒng)的總體設(shè)計(jì)52.1定量稱重控制系統(tǒng)的組成和工作原理52.1.1定量稱重裝置的組成52.1.2自動(dòng)定量稱重控制的工作原理62.2系統(tǒng)的結(jié)構(gòu)方案72.3系統(tǒng)的功能、特點(diǎn)及主要技術(shù)指標(biāo)83系統(tǒng)硬件設(shè)計(jì)概述103.1系統(tǒng)硬件的結(jié)構(gòu)103.2MCU單元113.2.1STC90C51RC/RD單片機(jī)113.2.2單片機(jī)最小系統(tǒng)124系統(tǒng)
