集成霍尔_配音版

IntegratedHallsensorandsimpleharmonicvibration,TheLaboratoryCenterofPhysics,ExperimentalPurpose,Learnthemeasurementmethodofstiffnesscoefficientofspringbystaticextensionmethod.UnderstandthebasiccomponentsandworkingprincipleofHallsensor.LearntomeasurethevibratingperiodofspringoscillatorusingtheHallswitchsensorandcalculatethestiffnesscoefficientofspring.,(1)HookesLaw(胡克定律):HookesLawstatesthatinanelasticmaterialstrainisproportionaltostressasshowninthefollowingequation:F=-KXwhere，Kisthestiffnesscoefficientofspring.,Experimentalprinciple,1.Stiffnesscoefficientofspringmeasuredbytwomethods:staticextensionmethodandvibratingperiodmethod,Experimentapparatus,1.MeasuringthestiffnesscoefficientofspringwithJolybalance(焦利秤),弹簧,砝码托盘,小反射镜,底座调节螺钉,游标卡尺,锁紧螺钉,砝码托盘,固定旋钮,固定架,verniercaliper,spring,weightsalver,reflector,loader,setscrew,Lock-screw,小指针,1.调整底脚螺钉使实验装置铅直；2.调节砝码盘指针靠近游标尺上的反射镜；3.读数时使反射镜上的刻线和砝码盘指针及其像重合；4.加减砝码应保持砝码盘水平。,1.Ensuretheequipmentissettobeplumb.2.Adjustthepointerofsalverneartothereflector.3.Onecanreadthedatajustasthepointerimageinthereflectoranditselfareinthesameheightwiththelineonthereflector.4.Keepthesalverlevelasoneaddsorreducesweights.,Howtogetthereadingcorrectly?,springsimpleharmonicvibrationperiod：,Experimentalprinciple,M为弹簧的有效质量(effectivemass);M1为弹簧自由端上挂的物体的质量。,利用霍尔传感器测量弹簧的倔强系数,1.测量基本原理：,弹簧振子的动力学方程为,该方程的解为,线性霍尔传感器内部结构示意图,2.IntegratedHallsensor(集成霍尔传感器),IntegratedHallsensorisonekindofmagnetism-sensingsensorbasedonHalleffectandintegratetechnology,whichisclassifiedaslinearhallsensorandswitch-typehallsensorbasedontheoutputmodeofhallvoltage.（1）Linearhallsensor(线性型霍尔传感器),Characteristic：Theoutputvoltagechangeslinearlywiththemagneticinductionexertedonthehallelement.,amplifier,Hallelement,集成开关型霍尔传感器内部结构框图,（2）HallSwitchsensor(开关型霍尔传感器),Characteristic：Theoutputvoltageisdigitalsignalwiththechangeofmagneticinductionexertedonthehallelement.,schmitttrigger,triode,differentialamplifier,集成开关型霍尔传感器的工作特性曲线,（2）HallSwitchsensor(开关型霍尔传感器),Conclusion:The“on-off”switchofhallswitchsensorisrealizedbythechangeofhallvoltagewiththatofexternalfieldmagneticinduction.,2.Gettheoutputcharacteristicofintegratedhallsensors(1)Measuretheworkingpositionandreleasingpositionofhallswitchsensor.,霍尔开关型传感器,alnico,集成霍尔传感器特性测量架,Measurementframe,测量原理：利用传感器上指示灯的亮灭确定工作点和释放点。,（2）Measurethemagneticinductionoftheworkingpositionandreleasingpositionofhallswitchsensorbylinearhallsensor.,线性霍尔传感器,Theoutputofthesensorissetto2.500Vasthereisnomagneticfield.Therelationshipbetweenthemagneticinductionandoutputvoltageisshownasfollowing.,whereKHisthesensitivityofthelinearhallsensor.,Fixupthehallswitchsensorandmakethealnicovibratewiththespringoscillatortorecordtheperiodofoscillation.Calculatethestiffnesscoefficientbytheequations.,3.Measuringprincipleofperiodofvibrationwithintegratedhallswitchsensor,(3)Measuringtheperiodofspringvibrationbyhallswitchsensor.,alnico,weight,Hallswitchsensor,Lock-screw,将集成开关型霍尔传感器固定，利用磁钢作简谐振动时，集成开关型霍尔传感器产生的电脉冲控制计数器计时，可实现对弹簧振子振动周期的测量。,集成霍尔传感器与简谐振动实验仪,要求：1.砝码下加一个小磁钢，测其振动周期。(smallalnico)2.再加一个大磁钢，测其振动周期。(bigandsmallalnicos),NOTICE,1.Installtheverniercaliperintherightwaytoavoidbreakingthereflector.2.Theterminalsofthesensorshouldbeconnectedtotherightline.3.Thespringshouldvibrateperpendicularlyduringthemeasurementofperiod.4.Onehavetowat