运用声学的方法和装置测量棉纤维中的麦克隆指数

1、运用声学的方法和装置测量棉纤维中的麦克隆指数运用声学的方法和装置测量棉纤维中的麦克隆指数In1993thenestatestandardRStUz604-93ttnFibre.TehnialnditinsasipleentedinRepublifUzbekistan.Inardaneiththisstandardtheirnaireindexasaddedtthenuberftheiprtantharateristisfttnfiber,hihidelyusedntherldtradeandharaterizingthelineardensityandaturityfthefibre.Theb

2、aserangefairnaireindexinrldtradefUplandttnis3,5-4,9.Ifthevalueisbel3.5andrethan4,9thedisuntisadefrthepriefttnfibre.Inthisregard,itisiprtanttntrlinstruentallyairnaireindexatpreparatinandpressingfseedttn,andalsatdevelpingnevarietiesfttn.Frdefinitinfairnaireindexintherldpratieaethdfairpereabilityisused

3、,hihrealizedinsuhdeviesasIrnaire,Fibrfine,Prtaret.ThesedeviesarealsenteredintHVIeasuringsystes.Reentlyinvariusindustriestheaustideviesareusedfrnndestrutivetestingfqualityffibrusaterials.Deviesthatuseaustiethdsaresipleindesignandreliableinperatin.Frauray,theyarentinferirtsiilardeviesusing,frexaple,th

4、eethdfairpereabilityfsaplesfttnfiberintheairstrea.In1itisshn,thatbyusingtheaustiethditispssibletdeterinethegradefaseedttnandttnfibrebybreakingladffiber.AtthesaetiethedependenefaustiattenuatininasapleffibersfrthEirbreakingladasused.In2,theresultsfstudiesfthephasedifferenedependingnsundavespassingthru

5、ghasaplefttnfiberfrtheirnaireindex,theeffiientflineardensityandaturityfttnfibersareshn.Thispaperdisussestheusefaustiethdfreasuringfirnaireindexfrthedapingfaustisillatins.Thebasisftheaustieasureentethdisthepressfdistributinfaustivibratinsinasaplefttn,plaedinthehaberandpatedinthefrfaylindrialtubeithaf

6、latbase.Thediretinfpassagefsundflutuatinsisperpendiulartthebases.Asapleffibersispssibletsiulateat-pnentistrpiprusediu(fiber,air).iththepassagefaplanesundavethrughsuhanenvirnentthereillbelssfenergyduetfritinfthefiber,hihillleadtahangeinthepressureaplitudefsundvibratins.Tarryutexperientalstudiesntheip

7、leentatinfanaustiethdfreasuringtheirnaireindexinthePAXTASANATILIYARKAZISieneentreasdesignedandnstrutedanexperientalsaplefaustiinstruent,hihappearaneandblkdiagraareshninFigures1and2.Figure1.TheappearanefaustiirnaireinstruentFigure2.TheblkdiagrafaustiirnaireinstruentThedevieperatesasflls.Sundvibratins

8、,generatedbyageneratr1andaradiatr2,sentttherkinghaberfthedevie,thihthetestingsaple3isplaed.Theeakenedsundaves,transittedthrughasaplefthefiber,isnvertedintaneletrialsignalbytheirphne4.Theeasuringunit5easurestheagnitudefthesignal.Inblk6theanalgsignalnvertedintadedutputsignal,hihisshnnadigitaldisplayfu

9、nit6.Theutputsignaleasuredbyunit6afterpassingthrughthesaplennetediththeparaetersfthefiberbytherati1:;(1);(2)hereU0vltageattheirphneintheabsenefthesaple,V;a-dapingeffiientfaustiaves,1/;L-thiknessfthefibrusass,;-lineardensity,tex;B-anstantfatr;eprsityfthesaple;f-frequenyfsundvibratins,Hz.Lineardensity

10、isnnetediththeirnaireindexthrugharati3:;(3)Frratis(1),(2)and(3)ehavethefrulaffuntinalnnetinfasignalnanexitfairphneithairnaireindexfreasuringfibrusaterial;(4)here(5)Bylgarithingtheequatin(4),efund(6)r本文由论文联盟.Ll.搜集整理(7)hereb0=lnU0.Frthefrula(7)eanseethatlinearregressinrelatinshipexistsbeteenasignalnan

11、exitfairphneattestingsapleandirnaireindexinlgarithisale.Thisequatinasusedintheregressinanalysisinthenstrutinftheinstruentalibratingraph.ttnsaplesfdifferentvarieties(108-F,S-6524,Bukhara-6,An-Bayaut2,Fergana-3,Yulduz),asellasstandardsaplesfthephysialandehanialprpertiesfttnfibereretestednanaustiinstru

12、enttstudythealibratindependenefaustiinstruentfrtheirnaireindex.Testserearriedutbythefllingethd.SaplesfttnithEightfabut500gpassedthrughthettnanalyzersuhasH.Then,fursaplesfeightn10gfreahsapleerelletedandeighedinthebalaneVLKT-500.Inparallel,exaplesereseletedfreahsapleandeasureentsereadenasystefHVISpinl

13、ab-900intersfirnaire.Thenthesapleislaidinttheeasuringhaberfaustiinstruent,andeasureentsftheutputsignalntheirphneatafixedheightftheeasuringhabererearriedut.Thentheeasureentsrepeatedntherthreesaples.Infureasureentsfreahsapletheaveragevaluefthesignalattheutputftheirphneasalulated.Further,nthebasisfaver

14、agevalues?feasureentsftheutputandirnairevalues,thelinearregressinequatinunderthefrula(7),hihnnetsthelgarithftheutputsignalfrtheirnaireindexerefundbytheethdfregressinanalysisnthePVbySSprgra.Frtheaverageddata,thediagrafthedependeneftheirnaireindexesfrtheindiatinsfthedevieasnstruted,hihispresentedinFigure3.Apltfthelgarithftheutputsignalfrth