超声波悬浮液粒子浓度仪的研制与试用

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1、同济大学硕士学位论文超声波悬浮液粒子浓度仪的研制与试用姓名：朱绍华申请学位级别：硕士专业：声学指导教师：朱士明20030101AbstractUltrasonicsuspensionmeasurememhasbroadforeground．Forexample。itiSimportantforanalyzingthepollution-treatingachievementstomeasuretheconcentrationofsuspendedparticlesinYellowRiverandChangjiangRiverTherearemanydemandsofultrasonicsu

2、spensionmcasurememinpowerplato，nuclearindustrialministryandSOon．Becauseofitson-linemcasuremem，easyoperationandeconomiccost,theresearchisoffar-reachingmeaning．Thefollowingeffortshavebeendoneinthisthesis：(1)First,thisthesisintroducedbasictheoryofattenuationandscattercausedbyultrasonicwavepropagating

3、msuspeIZSIOllS．(2)SomemsearchworkhasbeendoneforthemathematicsmodeIsofultrasonicparticles—measuringtechniques．Thethesishasinvestigatedsomemodels-Harker&Temple，UrickUrick-AmentandAHmodel．Foreachmodel，theattenuationtoe衔cientandvelocityofdifferentfrequencyhasbeentested,andtherelationshipbetweenattenua

4、tionandparticle’Sradius．velocityandparticle’sradiushasbeengamed．Thethesishasdiscussedthecharacteristicofeachmodel，aswellasthesimilaritiesanddifferencesofthemillapplication．(3)Wrehavebuiltonesetoffivechannelultrasonicvelocityandattenuationmeasuringequipmentandprogrammedthesoftwareofdataprocessing．T

5、heequipmentcanmeasuretheexample’Svelocity,attenuationandcalculateitsconcentration．(4)Makinguseofthissetofequipment,wehavemeasuredsomekindsofcolloidsuspensionsandemulsionsofdifferentultrasonicfrequencyandconcentrationtogetthevelocityandattenuationfromwhichWecangettheparticle’Sradiusandconcentration

6、．胎haveanalyzedtheexperimentalresultsandcomparethemwiththetheoryresults．(5)W-ehaveinvestigatedthemethodofecho-numberratio(N腻’)(NandN’iSrespectivelytheechonumberinsuspensionsandwater)tomeasuretheconcentrationofsuspensions．Under1MHz,2Ⅻz．5姚wemeasuredtheechonumberratioandusedthedatatobuildup3setsoffitt

7、ingequation．Fromthefittingequation,theconcentrationCanbecalculated．同济大学硕士学位论文2詈大衙冈③◎黑G浯IIUN。忽鬟第一章绪论§1．1课题的提出悬浮液是由液体连续相和固体颗粒分散相组成的两相混合物，混浊的海水、河水、城市污水、矿浆、水煤浆等，都属于悬浮液之列。而悬浮液的浓度有着重要的理论和实际意义，一直是引人注目的研究课题。比如，对于饮用水而言，固体