最新推荐基于单片机的电子电子秤的设计外文文献Word下载.docx
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最新推荐基于单片机的电子电子秤的设计外文文献Word下载.docx
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4.ElectronicScaleisameasurementofthestatecompulsorytestapparatus,andhisqualifiedproductsaretestindexingthevalueofDvaluesofeandsubdivisionstandards,issubjecttotheprotectionofthenationalmetrologyproducts.Intheelectronicweighingthereisacategorycalled"
humanscale"
products,whichcantestinthemeasurementsector,weighingveryprecise.
Blockdiagraminterpretationoftheprincipleofelectronicbalance
Thefirstpartoftheelectronicscaleprincipleblockdiagram:
ProgramK/B(button)↑Fx→Sensors→OPZoom→A/Dconverter→CPU→→displaydriverdisplaymemory
WorkflowNote:
Whenanobjectonthepanwhenthepressurefacilitiestothesensorthatoccurreddeformation,sothatresistancetochange,whiletheuseofexcitationvoltagechanges,theoutputofachangeinanalogsignal.ThissignalamplificationbytheamplifieroutputtotheADC.ConvertedtofacilitatetheprocessingofthedigitalsignaloutputtotheCPUoperatorcontrol.CPUunderthekeyboardcommandsandprogramoutputtodisplaythisresult.Untiltheshowsucharesult.
Thesecondpartofthescaleoftheclassification:
1.Accordingtoprinciplesofpoints:
E-scalemechanicalscalemechanicalandelectricalintegrationscales2.Accordingtothefunctionssub:
CountingScalesWeighingScalePricingScale3.Purpose:
IndustrialCommercialScalesSpecialScalesBalance
Thethirdpartofthescaletypes:
1.ThefullnameofthedesktopScalereferstothevolumeoflessthan30Kgelectronicscale2.Thefullnameofplatformscalereferstothevolumewithinthe30-300KgElectronicScale3.Loadometerfullnamereferstothevolumeofmorethan300KgElectronicScale4.PrecisionBalance
4thPartoftheaccuracyofclassification:
IClass:
Specialscalesprecision≥1/10WanIIlevel:
high-precisionscale1/10000≤precisionof"
1/100,000III:
theaccuracyofscale1/1000≤precisionof"
1/10000ClassIV:
CommonScale1/100≤precisionof"
1/1000.
PartVofprofessionalterminology:
1.Maximumweighing:
anelectronbalance,excludingtareweight,themaximumloadcanweigh;
2.Minimumweigh:
aelectronicscalesbelowthevaluethatwouldhaveoccurredwhenarelativelyerror;
3.safeload:
120%ofthenormalweighingrange;
4.Ratedload:
normalweighingrange;
5.permissibleerror:
classtestwhenthemaximumdeviation;
6.asenseofquantity:
asingleelectronicscalescanshowthesmallestscale;
usually"
d"
torepresent;
7.analyticcapacity:
afunctionwithacountoftheelectronicscales,candistinguishthesmallestscale;
8.Resolution:
acountingfunctionwithanelectronicscale,theinternalcapacityofaResolutionofaparameter;
9.Warm-uptime:
ascaleusedtoachievethetargetsofthetime;
10.Accuracy:
Thefullnameofasenseofvolumeandvolumeratios;
11.electronicscaleuseofenvironmentaltemperature:
-10degreesCelsiusto40degreesCelsius12.platformscaleThetablesize:
25cmX30cm30cmX40cm40cmX50cm42cmX52cm45cmX60cm
PartVIelectronicscalefeatures:
1.Toachievelong-distanceoperations;
2.Toachieveautomaticcontrol;
3.Figuresshowthatanintuitive,reducehumanerror;
4.Highaccuracyandresolutionstrong;
5.Weighingrangeiswide;
6.uniquefeatures:
buckleweight,withholdingweight,zero,accumulated,warning,etc.;
7.maintenancesimple;
8.sizeissmall;
9.installation,calibrationsimple;
10.specialindustry,canbeaccessedbytheprinterorcomputer-driven;
11.Intelligentelectronicscale,quickreaction,highefficiency;
PartVIIoftheelectronicscaleinspectionprocess:
1.First,theoverallexamination:
whetherthewearandtear;
2.Whethertheboot:
thebootsequenceisfrom0to9inturnshowsthatfiguresarevague,canzero;
3.Whetherthebacklight;
4.withtheweighttestsinweighing;
5.chargersisintact,canuse;
6.partsarecomplete;
PartVIIIsensortype:
1.Resistive:
affordable,highaccuracy,widelyused;
2.Capacitive:
smallsize,lowprecision;
3.Maglev-style:
specialhigh-precision,highcost;
4.Hydraulicformula:
thecurrentthemarkethasbeeneliminated;
DisplayType:
1.LCD(liquidcrystaldisplay):
freeelectricity,energy-saving,withbacklight;
2.LED:
freeelectricity,powerconsumption,verybright;
3.Lamp:
electricity,powerconsumption,high;
K/B(button)type:
1.filmbutton:
contacttype;
2.mechanicalbuttons:
madeupofmanyindividualcombinationsofkeystogether;
sensorcharacteristics:
1.ratedload;
2.outputsensitivity;
3.non-linear;
4.hysteresis;
5.repeatable;
6.creep;
7.12:
00outputeffects;
8.ratedoutputtemperature;
9.12:
00input;
10.inputimpedance;
11.outputimpedance;
12.InsulationResistance;
13.toallowexcitationvoltage;
(5-18V)
PartIXsensordamagedphenomenon:
1.Weighingnotallowed;
2.Showsnoreturntozero;
3.Showsthenumberofbouncetojudgethesensor+E,-E,+S,-S1.Thefirsttouseresistanceprofilemeasurement4-line22Thisresistancevalue,atotalof6groups.Thecaseof400-450,comparedwithEurope+E,-E;
ifitis350inEurope,comparedto+S,-S;
forthe290inEurope,comparedtoR-arm;
2.+E,-Eterminatedonthe+1.5Vvoltage
Sensorcorrectlytoexertapressure,suchastheoutput+_Sincrease,thentheredtablepensas+S,thecontrary-S;
10thpartofthehigh-precisioncountingscalefeatures:
1.Kg/Ibunitconversionfunctions;
2.12:
00displayrangeadjustmentfunction(GLHseriesdoesnot)3.Samplingspeedadjustmentfunction;
4.Thereare10groupsmemoryfunctionsinglet;
5.maybeatthesametimetheweight,quantity,thecumulativefunction(GLHonlythenumberofcumulative)6.cansettheweight,themaximumamountofwarningfunction;
7.automaticzerotracking,temperaturelinearcorrection;
8.deductionofwithholdingheavyweightandfunction;
9.Standbyfunction;
10.thereiszeroshowszerotrackingrangeandscope;
11.thereisthebatteryvoltagecontroltolimitthefunction;
Electronicscalesareweighingtechnologyinanewtypeofinstrumentiswidelyusedinvariousoccasions.Electronicscalesandmechanicalscaleshavemoresmallsize,lightweight,simplestructure,lowpriceandpracticalvalueofstrong,convenientmaintenanceandsooncanbeinavarietyofenvironmentalwork,theweightofthesignalcanbeRemote,theweightofdisplayiseasytoimplementdigital,easy-to-computernetworking,processautomationofproductionandimprovelaborproductivity.ElectronicScalealsohasanautomaticzerotracking,overloaddisplayofself-extinguishingcharacteristics.
Mechanicalscales,floorscale/landinthevalue(carvalue),weigh-bridgesandotherfittedforce-sensitivesensorsandmicrocomputer-controlledintelligentweighinginstrumentsbecomeintelligentdigitalelectricalandmechanicalbalance(orthemechanicalandelectricaldual-usescales),toimprovethemechanicalbalanceofthemeasurementaccuracy,withlowcost,highreliability,simpleinstallationandsoon,withoutprejudicetotheoriginalmechanicalscalestoanytransmissionbearingstructure.Therearepeeled,settozero,thecumulativenumberoftimes,thecumulativeweight(cumulativeamountofvaluation-based),auto-zeroing,auto-trackingandotherfunctions.Weighingdatacanbedirectlyprintedortransmittedviacomputernetworks,industrialprocessescanimprovethelevelofscaleandproductquality,tradeclearingwiththescalecanimprovethecredibilityofincalculablesocialandeconomicbenefits.
ElectronicScaleisbasicallyasensor,amplifiercircuit,A/Dconversioncircuit,microcontrollercontrolofdisplayparts,switchmatrixcircuit,thekeyboardcircuitandpowercircuit.Weightsensorsignalsareconvertedtoacorrespondingelectricalsignal,afteramplifiedintotheA/Dconvertedintopulsesweight,throughtheSCMunderthecontroloftheanalogvoltagesignals
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