传感器技术外文文献及中文翻译Word文件下载.doc
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传感器技术外文文献及中文翻译Word文件下载.doc
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Sensortechnology@#@Asensorisadevicewhichproducesasignalinresponsetoitsdetectingormeasuringaproperty,suchasposition,force,torque,pressure,temperature,humidity,speed,acceleration,orvibration.Traditionally,sensors(suchasactuatorsandswitches)havebeenusedtosetlimitsontheperformanceofmachines.Commonexamplesare(a)stopsonmachinetoolstorestrictworktablemovements,(b)pressureandtemperaturegageswithautomaticsshut-offfeatures,and(c)governorsonenginestopreventexcessivespeedofoperation.Sensortechnologyhasbecomeanimportantaspectofmanufacturingprocessesandsystems.Itisessentialforproperdataacquisitionandforthemonitoring,communication,andcomputercontrolofmachinesandsystems.@#@Becausetheyconvertonequantitytoanother,sensorsoftenarereferredtoastransducers.Analogsensorsproduceasignal,suchasvoltage,whichisproportionaltothemeasuredquantity.Digitalsensorshavenumericordigitaloutputsthatcanbetransferredtocomputersdirectly.Analog-to-coverter(ADC)isavailableforinterfacinganalogsensorswithcomputers.@#@ClassificationsofSensors@#@Sensorsthatareofinterestinmanufacturingmaybeclassifiedgenerallyasfollows:
@#@@#@Machanicalsensorsmeasuresuchasquantitiesaspositions,shape,velocity,force,torque,pressure,vibration,strain,andmass.@#@Electricalsensorsmeasurevoltage,current,charge,andconductivity.@#@Magneticsensorsmeasuremagneticfield,flux,andpermeablity.@#@Thermalsensorsmeasuretemperature,flux,conductivity,andspecialheat.@#@Othertypesareacoustic,ultrasonic,chemical,optical,radiation,laser,andfiber-optic.@#@Dependingonitsapplication,asensormayconsistofmetallic,nonmetallic,organic,orinorganicmaterials,aswellasfluids,gases,plasmas,orsemiconductors.Usingthespecialcharacteristicsofthesematerials,sensorscovertthequantityorpropertymeasuredtoanalogordigitaloutput.Theoperationofanordinarymercurythermometer,forexample,isbasedonthedifferencebetweenthethermalexpansionofmercuryandthatofglass.@#@Similarly,amachinepart,aphysicalobstruction,orbarrierinaspacecanbedetectedbybreakingthebeamoflightwhensensedbyaphotoelectriccell.Aproximitysensor(whichsensesandmeasuresthedistancebetweenitandanobjectoramovingmemberofamachine)canbebasedonacoustics,magnetism,capacitance,oroptics.Otheractuatorscontacttheobjectandtakeappropriateaction(usuallybyelectromechanicalmeans).Sensorsareessentialtotheconductofintelligentrobots,andarebeingdevelopedwithcapabilitiesthatresemblethoseofhumans(smartsensors,seethefollowing).@#@ThisisAmerica,thedevelopmentofsuchasurgeryLinBaianexample,throughthescreen,througharemotecontroloperatortocontrolanothermanipulator,throughtherealizationoftherightabdominalsurgeryAfewyearsagoourcountrytheexhibition,theUnitedStateshasbeensuccessfulinachievingtherighttotheheartvalvesurgeryandbypasssurgery.Thisrobothasinthearea,causedagreatsensation,butalso,AESOP'@#@ssurgicalrobot,Infact,itthroughsomeequipmenttosomeofthelesionsinspections,throughamanipulatorcanbeachievedonsomepartsoftheoperationAlsoincludingremotelyoperatedmanipulator,andmanydoctorsareabletoparticipateintherobotundersurgeryRobotdoctortoincludedoctorswithpliers,tweezersoraknifetoreplacethenurses,whilelightingautomaticallytothedoctor'@#@smovementslinked,thedoctorhandsoff,lightingwentoff,Thisisverygood,adoctor'@#@sassistant.@#@Tactilesensingisthecontinuousofvariablecontactforces,commonlybyanarrayofsensors.Suchasystemiscapableofperformingwithinanarbitrarythree-dimensionalspace.hasgraduallyshiftedfrommanufacturingtonon-manufacturingandserviceindustries,wearetalkingaboutthecarmanufacturerbelongingtothemanufacturingindustry,However,theservicessectorincludingcleaning,refueling,rescue,rescue,relief,etc.Thesebelongtothenon-manufacturingindustriesandserviceindustries,sohereiscomparedwiththeindustrialrobot,itisaveryimportantdifference.Itisprimarilyamobileplatform,itcanmovetosports,therearesomearmsoperate,alsoinstalledsomeasaforcesensorandvisualsensors,ultrasonicrangingsensors,etc.It’ssurroundingenvironmentfortheconductofidentification,todetermineitscampaigntocompletesomework,thisisservicerobot’soneofthebasiccharacteristics@#@Invisualsensing(machinevision,computervision),cameralopticallysensethepresenceandshapeoftheobject.Amicroprocessorthenprocessestheimage(usuallyinlessthanonesecond),theimageismeasured,andthemeasurementsaredigitized(imagerecognition).Machinevisioniss
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