氣動技術(shù)雙語電子教案公開課一等獎市賽課獲獎?wù)n件

SwitchesandSensors

Forintegratedcontrolsystems《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorWUHANUNIVERSITYOFTECHNOLOGYLOGISTICSENG.DEPT.武漢理工大學物流工程學院ContentsClickthesectiontoadvancedirectlytoitMagneticcylindersReedswitchprincipleSensorprincipleQM/45/*rangeQM/33,34,134rangeM/40,41,42rangeInductiveproximitysensorsVacuumelectricswitchVacuumelectronicswitchCablecapacitanceIntroduction《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorIntroductionTypicalelectro-pneumaticsystemsconsistof:magneticcylindersandsolenoidvalvesfordynamicpowerreedswitchesandsensorsforfeedbackelectroniclogicforcontrolReedswitchesandsolidstatemagneticsensorsarefittedtocylinderstofeedbackparticularpositionsofthepistonSolidstateproximitysensorscanbeusedtoreplacelimitswitches,fordetectingthepositionofmechanismsorothermovingpartsReedswitchesandsolidstatesensorsaresmall,fast,easytofitandadjust.Theysimplifyinstallationontothemachineapplication《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorMagneticcylindersMagneticcylindershaveabandofmagneticmaterialinsetaroundthecircumferenceofthepistonThepolarityisinparallelwiththeaxisofthecylinderThebarrelismadeofnonferrousmaterialByplacingreedswitchesalongtheoutsideofthecylinder,signalscanbegivenattheextremeandintermediatepositionsofstrokeClicktheillustrationtostartandstopanimation《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchprincipleAbasicreedswitchconsistsofasmallglasstubecontainingsoftironcontactreedsnormallysprungopenWhenamagneticfieldisinrangethereedswillbecomemagneticTheendswillbeofoppositepolarityandpullthemselvestogetherClicktheillustrationtostartandstopanimation《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorMagneticsensorprincipleInthepresenceofamagneticfieldthemagnetoresistivesensorhasalowerresistance.ThiscausescurrenttobedrawnfromthebaseofthetransistorturningitonThecircuitincorporatesl.e.d.,reversepolarityprotectiondiodesandsuppressiondiodeforaninductiveloadsensorNSload+V0V《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchesandsensorSlimcylindricalhousingPVCcablein2or5metrelengthsOptionalveryflexiblepolyurethanecableWithorwithoutl.e.d.indicatorRangeoffourreedswitchesandonesolidstatesensor《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchesBasicreedswitchShownconnectedtoarelayorsolenoidcoilwithdiodesuppressionford.c.application10to30Va.c./d.c.Maximumswitchingpower10W/VABrownBlue+V0VCoilProtectiondiodeford.c.onlyQM/45/RAP《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchesReedswitchwithl.e.d.indicatorThreewiresemulatingp.n.p.sensorCurrentsourcedontheblackwiretothecoilResistorprotectsl.e.d.fromovervoltageBlueCoilBlack0VBrown+V0VQM/45/LAPProtectiondiode《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchesReedswitchwithl.e.d.indicatorandtwowiresonlyCurrentsourcedontheblackwiretothecoilZenerdiodeprovidessmallvoltagedroptoturnonl.e.d.10to240Va.c./170Vd.c.10W/VAmaximumShownwithVDRforsuppressiona.c.ord.c.BlueCoil0VVoltagedependantresistor(VDR)Brown+VQM/45/LAP《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchesReedswitchwithl.e.d.indicatorThreewiresemulatingn.p.n.sensorCurrentsunkonthebluewirefromtheloadto0VResistorprotectsl.e.d.fromovervoltageBrownBlackLoadProtectiondiode+VBlue0V+VQM/45/LAN《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorSolidstateswitchesSolidstatemagneticallyoperatedp.n.p.outputUsedforapplicationswherevibrationlevelsareunsuitableforreedswitchesMagnetoresistivesensorelement‘Sensoron’l.e.d.indicator10to30Vd.c.200mAmaximumbrownblueblack

pnp+V0V0VcoilprotectiondiodeQM/45/EAP《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchesandsensorsNeatcylindricalhousingwithfixedorplug-incableStraightor90oplug-inconnectorcablesOptional:veryflexiblepolyurethanecableor

hightemperature(150oC)siliconcableWithorwithoutl.e.d.indicatorWiderangeofreedswitchesandsolidstatesensors《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchesPlainreedswitchPlainchange-overreedswitchThreewirereedswitchwithl.e.d.,emulatingp.n.p.sensorandplug-incableThreewirereedswitchwithl.e.d.,emulatingn.p.n.sensorTwowirereedswitchwithl.e.d.bluebrown+VLoad0Vbrown+Vblueblack0V0VLoadLoadbrown+Vblue0VLoad+Vblack

brown+VblueLoad0VQM/33QM/33/CQM/34/PQM/34/NQM/34/Sbrown+Vblue0VLoad0Vblack《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorSolidstatesensorsOutputp.n.p.fixedcableOutputp.n.p.plug-incableOutputn.p.n.fixedcableOutputn.p.n.plug-incablePulsestretcher.Outputp.n.p.fixedcable.Whenoperatedandreleasedoutputwillremainonforafurther30msapproximately.Suitableforpartstrokepositiononfastoperatingcylinders

brown+Vblue0VblackpnpLoad0V

134pnpbrown+Vblue0VblackLoad0V1

brown+VblacknpnLoad+Vblue0V

34npnbrown+VblackLoad+Vblue0VblackLoad0V

brown+Vblue0VQM/134QM/134/PQM/134/NQM/134/N/PQM/134/X《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchesandsensorsLowprofilewithdovetailslideforcylinderswithintegraltrackinextrudedbodyScrewtighteningFixedcableorplug-inconnectorcablesstraightor90oWithorwithoutl.e.d.《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchesandsensorsLowprofilewithdovetailslideforcylinderswithintegraltrackinextrudedbodyScrewtighteningFixedcableorplug-inconnectorcablesstraightor90oWithorwithoutl.e.d.《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorReedswitchesTwowirewithl.e.d.10to240Va.c./170Vd.c.WithhightemperaturecableWithveryflexiblepolyurethanecableTwowirewithl.e.d.andplugincable10to60Va.c./74d.c.Change-overcontactswithoutl.e.d.

+VblueLoad0Vbrownbrownblueblack0V0VLoadLoad+VM/40M/40/PM/40/C

brownblueLoad0V+VTM/40M/40/*/PU《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorSolidstatemagneticswitchesOutputn.p.n.10to30Vd.c.200mAmaximumOutputp.n.p.10to30Vd.c.200mAmaximumOutputp.n.p.withveryflexiblepolyurethanecableOutputp.n.p.withplug-incable

brown+Vblue0VblackpnpLoad0V

brown+VblacknpnLoad+Vblue0VM/41M/42

134pnpbrown+Vblue0VblackLoad0VM/42/*/PUM/42/P《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorInductiveproximitysensorsSensethepresenceofmetalnearthetipUsedasalimitswitchformechanicalpartsDependingontype:Range0.8to2mmSwitchingfrequency500to2023HzWithorwithoutl.e.d.10to30or6to30Vd.c.Normallyclosedornormallyopenp.n.p.outputoutput

brownblueblackpnpLoad0V+V

brownblueblackpnpLoad0V+VM/P28473M/P70104/1&2M/P70104/3&4M/P70104/5&6M/P70104/7&8M/P70104/9《氣動技術(shù)》雙語電子教案吳洪明

Chapter8SensorCablecapacitanceLongleadsabovethestandardcablelengthbecomealongthincapacitor(equivalentcircuit)Closingtheswitchshortsthecapacitor,theinstanthighcurrentoverloadsanddamagestheswitchcontactsFitaninductor(470μH)

closetotheswitch.Thisdampsthesurgebuthasalowsteadystateresistance+V0VL+V0VLoad+V0