阐述超声波测距仪外文资料翻译

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1、阐述超声波测距仪外文资料翻译阐述超声波测距仪外文资料翻译导读：hedutilizingmechanicaldevicessuchascalipers,micrometers,andthelike.Hoationtechniques.ItisknoinedbymeasuringthepropagationtimeofaeterDocumentTypeandNumber:UnitedStatesPatent5442592Abstract:Anultrasonicdistancemetercancelsouttheeffectsoftemperatureandhumidityvar

2、iationsbyincludingameasuringunitandareferenceunit.Ineachoftheunits,arepetitiveseriesofpulsesisgenerated,eachhavingarepetitionratedirectlyrelatedtotherespectivedistancebetitterandanelectroacousticreceiver.Thepulsetrainsareprovidedtorespectivecounters,andtheratioofthecounteroutputsisutilizedt

3、odeterminethedistancebeingmeasured.A.BACKGROUNDOFTHEINVENTIONThisinventionrelatestoapparatusforthemeasurementofdistanceand,moreparticularly,tosuchapparatusitsultrasonicachinetoolsmustbecalibrated.Inthepast,thishasbeenacplishedutilizingmechanicaldevicessuchascalipers,micrometers,andthelike.H

4、oationtechniques.Itisknoinedbymeasuringthepropagationtimeofawavetravellingbetweenthosetwopoints.Onesuchtypeofwaveisa345678910阐述超声波测距仪外文资料翻译导读：vidingdistancemeasuringapparatuseasuringunit.Thereferenceandmeasuringunitsarethesameandeachincludesanelectroacoustictransmitterandanelectroacousticre

5、ceiver.Thespacingbetitterandthereceiverofthereferenceunitisafnultrasonic,oracoustic,easuredbymultiplyingthetransittimeoftheediumseparatingtheteasurethedistancebetediumbeteasuredisair,thesoundvelocityisdependentuponthetemperatureandhumidityoftheair.Itisthereforeafurtherobjectofthe,presentinv

6、entiontoprovideapparatusofthetypedescribedperatureandhumidityvariations.B.SUMMARYOFTHEINVENTIONTheforegoingandadditionalobjectsareattainedinaccordanceeasuringapparatuseasuringunit.Thereferenceandmeasuringunitsarethesameandeachincludesanelectroacoustictransmitterandanelectroacousticreceiver.

7、Thespacingbetitterandthereceiverofthereferenceunitisafixedreferencedistance,whereasthespacingbetween345678910阐述超声波测距仪外文资料翻译导读：achoftheunits,thetransmitterandreceiverarecoupledbyafeedbackloopittertogenerateanacousticpulseitter,sothatarepetitiveseriesofpul