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1、PrincipleandapplicationofthephotoelectricencodercircuitAccordingtothetestprinciple,encodercanbedividedintoopticaltype,magnet,inductiveandcapacitive.Accordingtoitscalibrationmethodandsignaloutputform,canbedividedintoincremental,absolutetypeandhybrid3kinds.Incrementalencoderisdirectlyfor
2、theuseofphotoelectricconversionprincipleoutputthreesquarewavepulsedA,BandZphase;A,Btwogroupsofpulsephasedifference90DHS,thuscaneasilytelldirectionofrotation,andZforeveryturninapulse,usedtobenchmarkpositioning.Itsadvantagesaresimplestructure,mechanicalprincipleofaveragelifeexpectancyint
3、hetensofthousandsofhoursabovecanbe,stronganti-jammingcapability,highreliability,suitableforlongdistancetransmission.Itsdefectisunabletooutputshaftrotationabsolutelocationinformation.Absoluteencoderisdirectoutputdigitalquantitysensor,initscircularyardsplatealongradialdirectionseveralcon
4、centricyardsway,eachofwhichwaythebypervioustolightandopaqueandsectorofthesector,adjacentcodewordnumberisdoublerelationship,yardsdishthecodewordisitsbinarynumberofdigits,digitalsideinthecodesalverilluminant,anothersidecorrespondingtoeveryoneyardwayhaveaphotosensitivecomponent;Whenyardsi
5、ndifferentposition,diskbyvariousphotosensitivecomponentsaccordingtothecorrespondinglightornotconversion,formingabinarynumberlevelsignal.Thecharacteristicsoftheencodercounterandaxisisnotinanypositioncanbereadoutafixedpositionandcorrespondingdigitalyards.Obviously,codeword,themorethebett
6、ertheresolution,foranNbinaryresolutioncodercodesalvermusthaveNbarcodeway.ForanNbinaryresolutioncodercodesalvermusthaveNbarcodeway.Atpresentdomestichave16bitsofabsoluteencodersproducts.Absolutephotoelectricencoderisusenaturalbinaryorcirculationbinary(Gregoryyards)mannerphotoelectricconv
7、ersion.Absolutephotoelectricencoderandincrementalencoderdifferenceindiskpervioustolight,opaquelinegraph,absoluteencodercanhavesomecode,accordingtoreadyardsplatecoding,detectionabsoluteposition.Codedesigncanusebinarycode,recyclingyards,binaryfillyards,etc.Itsfeaturesare:(1)candirectly