MCS-51单片机在超声波流量计中的应用

MCS-51单片机在超声波流量计中的应用(煤炭科学研究总院唐山分院)本文简要介绍了用于管道输送计量的LCZ-803型超声波流量计的工作原理及系统组成,着重阐述了MCS-51单片机在超声波流量计中的典型应用。单片机　时差法　超声波流量计1,,,,(),LCZ803LCZ80MCS51,,2,,1,12,,,,1T1:T1=Dcos1(C+Vsin)D(mm);();V(m/s);T2:T2=Dcos1(C-Vsin):V=Dsin2TT0T0=T1+T2T=T2-T1,,101998年3月水力采煤与管道运输第1期LCZ803,32LCZ8032,CPU1Inte18751,,,NCPU2Inte18031,CPU27128,6264,827982558253F1F2AD723712D/A,05V420mACPU128255DS128873.1,,,803116/,,10MHz,8031,12MHz,500Hz,,8253,,16,2.6MHz,8253111998年3月　　　　　　　　MCS—51单片机在超声波流量计中的应用　　　　　　　　第1期74LS393,F1F28253,,74LS39382558031T0,1,,333.2/45,8279,,8279CPU21,CPU216,LED,,,,3.3DS12887MC146818,DS1287,DS12887DS1287,DS1288764RAM24,,,DS12887,16,,,,,114RAM,,3.4D/AD/AAD12D/AAD7237,,/AD694,420mA,41500m/s121998年3月水力采煤与管道运输第1期,,10-3,1%,10-510-6,,,,,CPU24,44.1,,,;,,;,,,,,,4.2T01;08031/T0,T0100ms,,18279FIFORAM8031,80318279DS12887,0,8031554.3,:(1);(9)131998年3月　　　　　　　　MCS—51单片机在超声波流量计中的应用　　　　　　　　第1期2,-0.3mm,3,34t/h,20%,500mg/L10001000mm,8m,(6%11.2%),,MXK7044.119955.3t/a17t/a,40t/a,2004,450,19961430.82,4.2,,,,,,,,,,,,,:秦洪武,男,1938年10月生,高级工程师。1965年8月毕业于山东矿业学院。一直从事水力采煤工艺研究,获煤炭工业部科技进步二等奖一项,辽宁省科技进步三等奖一项,发表论文多篇。(收稿日期:1997—09—04)　　(13)(2);(3)CPU1CPU2;(4)5,,,,:李志宾,男,1965年生,工程师,煤科总院唐山分院大方公司总经理。1985年毕业于山东矿业学院工业电气自动化专业,现从事自动化仪表及自动化控制工程的研制开发和管理工作。煤炭科学研究总院唐山分院大方公司,邮政编码:063012(收稿日期:1997—09—12)　　91998年3月　　　　　　　井下原煤全部旱提水采工艺系统的优化选择　　　　　　　　第1期ENGLISHABSTRACTSOptimumSelectionoftheHydrominingSystemForHoistingAlltheUndergroundRun-of-MineCoalinConventionalManner---QinHongwuetalAbriefintroductionismadeofthegeologicalandcur-rentminingconditionsoftheseamlocatedinthewestwingoftheXianghuataiShaftofDoulishanCoalMine,LianshaoMiningAdministration,HunanProvince,fhenecessityofshiftingconventionalminingsystemtohydrominingsystemforpovertyrelief,thefeasibilityofthetechnologicalprocessselscted,andtheeconomicandsocialreturnsyieldedafterhydrominingsystemisadopted.ApplicationoftheMCS-51Single-chipProcessorForUltra-sonicFlowmeter---LiZhibinThepaperpresentsageneralreviewoftheoperatingprincipleandsystemmake-upoftheLCZ-803ultrasonicflowmeterforpipelineconveyance,withthestresslaidondescriptionofatypicalcaseinapplyingtheMCS-51single-chipprocessorinthesystem.ExperimentalStudyoftheModeandMechanismofBedFil-trationofDenseCoalSlurryinHydromines---LianWenranetalRecoveryoffinecoalisanindespensarylinkofhydro-miningprocess.Thetreatmentsystemscurrentlyusedsuf-ferfromthedrawbacksofbeingcomplicated,andhighininitialandoperatingcosts.Abriefdescriptionisgiveninthepaperoftheexperimentalstudyofthemechanismofbedfil-trationsystemandinter-relationoffilteringparametersin-volvedforreclaimingfinecoalwiththeuseofalaboratorysystemtosimulateanundergrounddewateringscrapercon-veyor.TheLawofstratabehavioursinHydraulicShortwallingA-longtheDip---TianJingxueetalInvestigationintothelawofmovementofroofstratumattheface,whenashortwallingsystemtothediporalongthestrikeofapplied,ismadewithfiniteelementandme-chanicalmethods.Basedontheactually-measureddata,thedistributionandlawofmanifestationofrockpresureaswellasthemechanismofoccurrenceofpressurebumpinhy-drominehavebeenbroughttolight.TheSuctionTypeCoal-waterSumpForSmall-sizeCoalDesignandApplicationExperience---ChangJianyongetalThesumpdevelopedbyabsorbingtheexperienceofus-ingtheforcedtypesumpsoffersahostofmerits,includinglesslossinelevation,reducedengineeringworkandgreaterreliability,etc.Itsintroductioninhydrominemayresultin8%-12%higherincreaseincoalrecovery,10%reductionofchamberconstructionwork,reducedsizeofsystemandlesscapitalcost.AnalysisAndDesignoftheFilterAxleAndDistributionValveofAPressureFilter---ZhangMengjiAnalysisismadeofthefilteraxleandstructureofthedistributionvalveofthePGpressurefilter.Throughdeter-minationofthemainparametersinvolvedandanalysisofstructuraldesign,itisconcludedthatthenovelandhigh-efficiencyPGpressurefilterfeaturinglowenergyconsump-tionandlowercakemoistureisanadvancedequipmentsuit-ableforuseinreplacementofoutdatedvaccumfilters.ImprovedSuction-TypeCoal-waterSump---DaiTian-guanAsamaintypeofcoal-watersumpforlarge-sizecoalslurry,thesuctiontypesumponcefoundwidespreadappli-cationsinhydrominesandhydrominingdestrictsacrossChi-nainthelate50's.Howeverbecauseofitsinherentdraw-backsofbeingsmallineffectivevolumeplusdifficultiesinstartingandeffectingconstant-ratecoalfeeding,thesuctionsumpisnowbasicallyobsolete.Yetinconsiderationofthespecialfeaturesofthiskindofsump,suchaslesslossinele-vation,fewerchamberconstructionwork,andbetteropera-tionandmanagementconditions,etc,amuchimprovedver-sionisthereforeproposed.()481998年3月　　　　　　　　　　　　水力采煤与管道运输