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1、UltrasonicrangingsystemdesignPublicationtitle:SensorReview.Bradford:1993.Vol.ABSTRACT：Ultrasonicrangingtechnologyhaswideusingworthinmanyfields,suchastheindustriallocale,vehiclenavigationandsonarengineering.Nowithasbeenusedinlevelmeasurement,self-guidedautonomousvehicles,field

2、workrobotsautomotivenavigation,airandunderwatertargetdetection,identification,locationandsoon

3、ingprecision,theboundandtheusage,aportableultrasonicrangingsystembasedonthesinglechipprocessorwasdeveloped.Keywords：Ultrasoundr,RangingSystem,SingleChipProcessorlJntroductiveWiththedevelopmentofscienceandtechnology,theimprovementofpeople'sstandardofliving,speedingupthedevelop

4、mentandconstructionofthecity,urbandrainagesystemhavegreatlydevelopedtheirsituationisconstantlyimproving.However,duetohistoricalreasonsmanyunpredictablefactorsinthesynthesisofhertime,thecitydrainagesystem.Inparticulardrainagesystemoftenlagsbehindurbanconstruction.Therefore,the

5、reareoftengoodbuildingexcavationhasbeenbuildingfacilitiestoupgradethedrainagesystemphenomenon.Itbroughttothecitysewage,anditiscleartothecitysewageanddrainageculvertinthesewagetreatmentsystem,comfortisveryimportanttopeople'slives.Mobilerobotsdesignedtoclearthedrainageculvertan

6、dtheautomaticcontrolsystemFreesewageculvertclearguaranteerobot,therobotisdesignedtocleartheculvertsewagetothecore.ControlSystemisthecorecomponentofthedevelopmentofultrasonicrangefinder.Therefore,itisveryimportanttodesignagoodultrasonicrangefinder.2.Aprincipleofultrasonicdista

7、ncemeasurement2.1TheprincipleofpiezoelectricultrasonicgeneratorPiezoelectricultrasonicgeneratoristheuseofpiezoelectriccrystalresonatorstowork.Ultrasonicgenerator,theinternalstructureasshown,ithastwopiezoelectricchipandaresonanceplate.Whenitstwopluspulsesignal,thefrequencyequa

8、ltotheintrinsicpiezoelectricoscillationfrequencychip,thechipwillhapp