SAS_Presentation_customer.pdf

《SAS_Presentation_customer.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、SteeringAngleSensorsBournsSensorsOutline•ExampleofExistingSensor•BasicSensorPrinciple•AMRSensorSetup•Multiturnanglemeasurementprinciple•Example:Calculationofthesignal•Example:Temperatureeffects•Example:MeasurementResolution•MagnetDesign•MechanicalSetup•SummarySteeringAngleSe

2、nsorSetup•SteeringAngleSensorBlockDiagram•FailsafeConceptBlockDiagram•FirmwareSafetyFeatures•TypicalTestplanandResults•Brief:ManufacturingConceptNon-contactSteeringAngleSensorsESPanglesensorsamplespecificationsKeyElectricalSpecificationsType6000AngularpositionTotalTravel-780

3、°to780°Resolution0.1°AbsoluteError(Nonlinearity)±1.4°AngularspeedRange-1016to1016°/sResolution4°/sDataandcontrolinterfaceInterfacetypeCAN2.0A(optionCAN2.0B)Baudrate500kbits/secUpdaterate10msZeropositioncalibrationviaCANbusCalibrationcontrolviaCANbus“Onboard”softwareupdatesvi

4、aCANbusSteeringanglesensorforvehicleAutomatedself-testyesstabilitycontrol,e.g.ESPPowersupplyvoltage+8…+16VPowersupplycurrent<50mAmpsOperationaltemperaturerange-40°Cto+85°CBasicSensorprincipleDirectAngleSensingbasedonAnisotropicMagneto-ResistanceRotarypermanent•Signaliscreate

5、dbymagneticfieldmagnetdirection•MagneticfieldstrengthhasnoinfluenceonoutputsignalElectricalMagnetizationM•RotatingmagnetmagnetizespermalloycurrentI•ElectricalresistancechangeswithdirectionofmagnetizationFerromagnetic•resistancechangeisnotdependentonthin-filmconductivestripma

6、gneticfieldstrength(PermalloyNiFe)•cos2-lawlimitsAMReffecttomagneticrr2fieldanglesof180°R=R+ΔR⋅cosα(M,I)0AMRSensorSetup•SensorelementsaresetupastwoindividualfullWheatstonebridges•Eachsensorelementprovidestwoindependentoutputs,asine-andacosine-signal•Ratioofthetwosignalsispro

7、portionaltothetanoftheangleofthemagneticfield.Non-contactSteeringAngleSensorsMulti-turnAngleSensorPrincipleMagnetsaremountedintotwo(ormore)gearmoduleswithdifferentnumbersofgearsandcoupledtosteeringcolumnthroughcommondriveRotaryshaftAMRsensorsaremountedtoreadtheindividualαmag

8、netorientation.CentergearTogetherwithsignalprocessingasteeringanglesensoris