超声波测距仪外文资料翻译

《超声波测距仪外文资料翻译》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、UltrasonicdistancemeterDocumentTypeandNumber:UnitedStatesPatentAbstract:Anultrasonicdistancemetercancelsouttheeffectsoftemperatureandhumidityvariationsbyincludingameasuringunitandareferenceunit.Ineachoftheunits,arepetitiveseriesofpulsesisgenerated,eachhavingarepetitionratedirectlyrelatedtotheres

2、pectivedistancebetweenanelectroacoustictransmitterandanelectroacousticreceiver.Thepulsetrainsareprovidedtorespectivecounters,andtheratioofthecounteroutputsisutilizedtodeterminethedistancebeingmeasured.A.BACKGROUNDOFTHEINVENTIONThisinventionrelatestoapparatusforthemeasurementofdistanceand,morepar

3、ticularly,tosuchapparatuswhichtransmitsultrasonicwavesbetweentwopoints.Precisionmachinetoolsmustbecalibrated.Inthepast,thishasbeenaccomplishedutilizingmechanicaldevicessuchascalipers,micrometers,andthelike.However,theuseofsuchdevicesdoesnotreadilylenditselftoautomationtechniques.Itisknownthatthe

4、distancebetweentwopointscanbedeterminedbymeasuringthepropagationtimeofawavetravellingbetweenthosetwopoints.Onesuchtypeofwaveisanultrasonic,oracoustic,wave.Whenanultrasonicwavetravelsbetweentwopoints,thedistancebetweenthetwopointscanbemeasuredbymultiplyingthetransittimeofthewavebythewavevelocityi

5、nthemediumseparatingthetwopoints.Itisthereforeanobjectofthepresentinventiontoprovideapparatusutilizingultrasonicwavestoaccuratelymeasurethedistancebetweentwopoints.Whenthemediumbetweenthetwopointswhosespacingisbeingmeasuredisair,thesoundvelocityisdependentuponthetemperatureandhumidityoftheair.It

6、isthereforeafurtherobjectofthe,presentinventiontoprovideapparatusofthetypedescribedwhichisindependentoftemperatureandhumidityvariations.B.SUMMARYOFTHEINVENTIONTheforegoingandadditionalobjectsareattainedinaccordancewiththeprinciplesofthisinventionbyprovidingdistancemeasuringapparatuswhichincludes

7、areferenceunitandameasuringunit.Thereferenceandmeasuringunitsarethesameandeachincludesanelectroacoustictransmitterandanelectroacousticreceiver.Thespacingbetweenthetransmitterandthereceiverofthereferenceunitisafixedreferenced