National service hotline

+86-514-87322487

18752721559

Search

SINOCERA

 

Online customer service hotline

SINOCERA PIEZOTRONICS, INC

+86-514-87322487

Technical Support

Steady integrity, dedication, innovation, and sustainable development

Technical Consulting

Introduction to the working principles and uses of several vibration sensors

Introduction to the working principles and uses of several vibration sensors
Release time：
2019-01-23 11:32
Abstract:
Therearevarioustypesofvibrationsensors.Accordingtodifferentworkingprinciples,theycanbedividedintoeddycurrentvibrationsensors,inductivevibrationsensors,capacitivevibrationsensors,piezoelectricvibrationsensors,andresistancestrainvibrationsensors.Thefollowingaretheworkingprinciplesandusesofthesetypesofvibrationsensors. Workingprinciplesandusesofseveralvibrationsensors 1.Eddycurrentvibrationsensor Eddycurrenttypevibrationsensorisavibrationtypesensorwhoseworkingprincipleiseddycurrenteffect.Itbelongstonon-contacttypesensor.Theeddycurrentvibrationsensormeasuresthevibrationparametersofanobjectbychangingthedistancebetweentheendofthesensorandthemeasuredobject.Eddycurrentvibrationsensorsaremainlyusedformeasuringvibrationdisplacement. 2.Inductivevibrationsensor Inductivevibrationsensorisavibrationsensordesignedaccordingtotheprincipleofelectromagneticinduction.Theinductivevibrationsensorisprovidedwithamagnetandaguidemagnet.Whenanobjectissubjectedtovibrationmeasurement,itcanconvertmechanicalvibrationparametersintoelectricalparametersignals.Inductivevibrationsensorscanbeusedtomeasurevibrationspeed,accelerationandotherparameters. Workingprinciplesandusesofseveralvibrationsensors 3.Capacitivevibrationsensor Capacitivevibrationsensorsobtainvariablecapacitancebychangingthegaporthecommonarea,andthenmeasuringthecapacitancetoobtainthemechanicalvibrationparameters.Capacitivevibrationsensorscanbedividedintotwotypes:variablegaptypeandvariablecommonareatype.Theformercanbeusedtomeasurelinearvibrationdisplacement,andthelattercanbeusedtomeasureangulardisplacementoftorsionalvibration. 4.Piezoelectricvibrationsensor Thepiezoelectricvibrationsensorusesthepiezoelectriceffectofthecrystaltocompletethevibrationmeasurement.Whenthevibrationofthemeasuredobjectputspressureonthepiezoelectricvibrationsensor,thecrystalelementwillgenerateacorrespondingcharge,andthenumberofchargescanbeconvertedintovibration.parameter.Piezoelectricvibrationsensorscanalsobedividedintopiezoelectricaccelerationsensors,piezoelectricforcesensors,andimpedanceheads. 5,resistancestraintypevibrationsensor Theresistancestrainvibrationsensorisavibrationsensorthatexpressesthemechanicalvibrationofthemeasuredobjectbythechangeofresistance.Therearemanywaystoimplementresistancestraintypevibrationsensors,andvarioussensingelementscanbeapplied,themostcommonofwhichisresistancestrain.
View details
How to select a vibration sensor?

How to select a vibration sensor?
Release time：
2019-01-23 11:31
Abstract:
1.Sensorclassification; 2.Commontypesofaccelerometers; 3.Selectionindex; 4.Selectionprinciple. Sensorclassification Twocategoriesaremainlyintroducedhere,oneisactiveandpassive,andtheotherisisolatedandnon-isolated. Activesensorsrefertosensorsthatconvertnon-electricalenergyintoelectricalenergyoutput,whichonlyconvertstheenergyitself,anddoesnotconverttheenergysignal.Itisalsoknownasanenergy-convertingsensorortransducer.Therefore,thistypeofsensorrequiresexternalenergysourceexcitation,suchasexcitationvoltage,toworkproperly.Duetotheneedforenergyconversion,electroniccomponentsarepackagedinsidethesensor,whichwillbringnoiseduringthemeasurementprocess.SuchsensorsareICPtype(alsoknownasIEPEtype)accelerationsensor,zerofrequencyaccelerationsensorandsoon. Passivesensorsaresensorsthatcanworknormallywithouttheneedforanexternalpowersource,andcanobtainunlimitedenergyfromtheoutside.Thistypeofsensorhasnoorminimalimpactonthemeasurementsystem,suchasstraingauges(flowers),piezoelectricsensors,andsoon. Isolationsensorreferstotheisolationbetweenthesensorandthestructureundertest,andcurrentcannotflowbetweenthetwo.Isolationsensorsareelectricallyseparatedfromthestructureundertest.Forexample,straingauges(flowers)areusuallyisolatedfromthestructureundertest.Thecommonpracticeforsensorstoachieveisolationistoinstallanisolationdeviceatthebottomofthesensorsothatcurrentcannotflow.AsshowninFigure1,thereddeviceistheisolationdevice.
View details
Page up
1