Engineering-Research-Activity2015｜SHINSHU UNIV.

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RobotarmandimpedanceanalyzerusingthecontactexperimentRelationshipbetweenthechangeinreciprocalmotionalcapacitancebeforeandafterthesensor’sbasecomesintocontactwithmaterialsandYoung’smodulusofmaterialsInItohLab,weconducttheanalysisofthequalityfactor,themotionalcapacitance,andthefrequency,whicharethemostimportantparametersofaquartzcrystaltuningforkforwristwatchapplication,andthechangeinmotionalcapacitance,whichisappliedtoaquartz-crystaltuning-forktactilesensor.Thechangeinthereciprocalofmotionalcapacitance,beforeandafterthesensor’sbasegettingintocontactwithneoprenerubbers,isintrinsicallyinducedbyboththeirdynamicYoung’smodulusandviscosityofneoprenerubbersat32.5kHz.Ourtactilesensorrespondsinawiderangefrom107to109N/m2ofYoung’smodulus.Todevelopatactilesensorlikeahumanhand,westudythetuningfork’sstructurebeingincontactwithviscoelasticmaterialsbytreatingthemasaviscoelasticfoundationdepictedbytheVoigtbody.WeintendtodevelopatactilesensortodetectviscosityofmaterialsbesidestheirhardnessorsoftnessandtoestimatebothdynamicYoung’smodulusandviscosityofviscoelasticmaterialsbyuseofseveraltactilesensorswithdifferentfrequencies.Aquartzcrystaliswidelyusedasatimingsourcefortheconsumerdigitalequipments.Inmanycompanies,however,itisoftentreatedasablackbox.Graduatesareworkingatmotorcarcompaniesandcompaniesthatmanufactureselectroniccomponents.HideakiItohProfessorEngaginginanalysisofaquartzcrystaltuningforkanditsapplication,andanalysisofquantizeddisplacementofsiliconMEMSresonatorformtheviewpointofelasticmodelAnalysis of the electrical equivalent circuit of a quartz-crystal tuning forkand its application to a tactile sensorItohLabElectrical& ElectronicEngineeringIn the FutureAfter GraduationRadiowavesarenotvisible,butveryusefulforcellphonesandwirelesscommunications.Ourresearchsubjectintroducedhereis“visiblelightcommunications.”TheinformationcanbecarriedbythevisiblelightemittedfromanLEDbyturningiton/offbasedontheinformationdata.Becauseyouseethelight,youknowwheretheinformationisfrom,andifyouhavetroublereceivingtheinformation,youknowwherethesourceofthetroubleis.Andtheinformationdoesnotreachinthedirectionwhereyoublockthelight(confidentiality).Inaddition,youcancommunicatewitheachotherunderwater,throughtheglass,andeveninplacesprohibitedtouseradiowavessuchashospitals,aslongasthelightreaches..Energy-savingLEDlampsareinstalledeverywhere.SoifsuchLEDlampsareequippedwiththevisiblelightcommunicationfunction,theycansendoutthesignalsofterrestrialdigitalbroadcastingandpositioningsignalslikeGPSinsteadofradiosignals.Andyouwillbeabletogetthedetailedmapofthesurroundingareaunderthestreetlamps.Visiblelightcommunicationisarelativelynewtechnology,soitsfuturedependsontheideasofyoungpeople.ShiroHanda,Professorsince 2005,after KobeUni-versityandNagano National College of Technology. His current research interest is the development of visible light communications.Experiment of visible light communications: Since we need neither wireless-workers license nor radio station license , communication experiment can be done freely in the laboratory.Visible Light Communications（Information transmission by LED light）Experiment of visible light communication over long distance: The world record is 42.19km that is attained by co-working company. We am challenging to satellite communications.Thestudentsgraduatedfromourlabare“workinghardandplayinghard”,whichisourmotto.Theyareactiveintheareasofelectronicsandcommunications,workingatradioequipmentmanufacturersandmobileservice,railroad,electricpowercompanies.HandaLabElectrical& ElectronicEngineeringIn the FutureAfter Graduation24

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