2023年全國(guó)碩士研究生考試考研英語(yǔ)一試題真題（含答案詳解+作文范文）_第1頁(yè)
已閱讀1頁(yè)，還剩22頁(yè)未讀， 繼續(xù)免費(fèi)閱讀

下載本文檔

版權(quán)說(shuō)明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)

文檔簡(jiǎn)介

1、Designation:E1065E1065M?14StardPracticefEvaluatingacteristicsofUltrasonicSearchUnits1ThisstardisissuedunderthefixeddesignationE1065E1065Mthenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioninthecas

2、eofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thispracticecoversmeasurementproceduresfevaluatingcert

3、ainacteristicsofultrasonicsearchunits(alsoknownas“probes”)thatareusedwithultrasonictestinginstrumentation.Thispracticedescribesmeansfobtainingperfmancedatathatmaybeusedtodefinetheacousticelectricresponsesofultrasonicsear

4、chunits.1.2Theproceduresaredesignedtomeasuresearchunitsasindividualcomponents(separatefromtheultrasonictestinstrument)usingcommercialsearchunitacterizationsystemsusinglabatyinstrumentssuchassignalgeneratspulsersamplifier

5、soscilloscopeswavefmanalyzers.1.3Theproceduresareapplicabletomanufacturingacceptanceincominginspectionofnewsearchunitstoperiodicperfmanceevaluationofsearchunitsthroughouttheirservicelife.1.4TheproceduresinAnnexA1–AnnexA6

6、aregenerallyapplicabletoultrasonicsearchunitsoperatingwithinthe0.4to10MHzrange.AnnexA7isapplicabletohigherfrequencyimmersionsearchunitevaluation.AnnexA8describesapracticefmeasuringsoundbeamprofilesinmetalsfromcontactstra

7、ightbeamsearchunits.AdditionalAnnexessuchassoundbeamprofilingfanglebeamsearchunitsinmetalalternatemeansfsearchunitacterizationwillbeaddedwhendeveloped.1.5ThevaluesstatedineitherSIunitsinchpoundunitsaretoberegardedseparat

8、elyasstard.Thevaluesstatedineachsystemmaynotbeexactequivalentstherefeeachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconfmancewiththestard.1.6Thisstarddoesnotpurpttoaddressallof

9、thesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2E1

10、316TerminologyfNondestructiveExaminations2.2OtherDocument:StardMethodsfTestingSingleElementPulseEchoUltrasonicTransducers33.Terminology3.1Definitions—FdefinitionsoftermsusedinthispracticeseeTerminologyE1316.3.2Definition

11、sofTermsSpecifictoThisStard:3.2.1aperture—thedimension(s)oftheactiveareaofthepiezoelectricelementofthesearchunitasestablishedbyexperimentation.3.2.2bwidth(BW)—thatptionofthefrequencyresponsethatfallswithingivenlimits.Int

12、histextthelimitsusedarethe6dBlevelasmeasuredfromthepeakofthefrequencyresponse.TheequationusedfBWis:BW5~fu2f1!fc3100(1)where:fu=upperfrequencyf1=lowerfrequencyfc=centerfrequency.Bwidthisexpressedasapercentage.3.2.3centerf

13、requency(fc)—thefrequencyvaluecalculatedtobeatthecenterofthebwidthlimits.3.2.4depthoffield(FD)—asmeasuredontheonaxisprofileofafocusedsearchunitthatptionofthesoundbeamthatfallswithingivenlimits.3.2.5focallength(FL)—ffocus

14、edsearchunitsthedistancefromthelenstothefocalpoint.3.2.6focalpoint(Fp)—ffocusedsearchunitsthepointalongtheacousticaxisofthebeaminwateratwhichthepeak(maximum)pulseechoamplituderesponseisrecdedfromaballtargetreflect.1Thisp

15、racticeisunderthejurisdictionofASTMCommitteeE07onNondestructiveTestingisthedirectresponsibilityofSubcommitteeE07.06onUltrasonicMethod.CurrenteditionapprovedJan.12014.PublishedFebruary2014.iginallyapprovedin1985.Lastprevi

16、ouseditionapprovedin2008asE1065–08.DOI:10.1520E1065_E1065M14.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageonthe

17、ASTMwebsite.3AvailablefromtheAmericanInstituteofUltrasonicsinMedicine14750SweitzerLaneSuite100LaurelMD207075906.ASummaryofChangessectionappearsattheendofthisstardCopyright?ASTMInternational100BarrHarbDrivePOBoxC700WestCo

18、nshohockenPA194282959.UnitedStates15.3Implementationmayrequiremedetailedproceduralinstructionsinafmatoftheusingfacility.5.4Themeasurementdataobtainedmaybeemployedbyusersofthispracticetospecifydescribeprovideaperfmancecri

19、teriafprocurementqualityassuranceserviceevaluationoftheoperatingacteristicsofultrasonicsearchunits.Allptionsofthepracticemaybeusedasdeterminedbytheuser.5.5Themeasurementsaremadeprimarilyunderpulseechoconditions.Todetermi

溫馨提示

  • 1. 本站所有資源如無(wú)特殊說(shuō)明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁(yè)內(nèi)容里面會(huì)有圖紙預(yù)覽，若沒(méi)有圖紙預(yù)覽就沒(méi)有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 眾賞文庫(kù)僅提供信息存儲(chǔ)空間，僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請(qǐng)與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。

評(píng)論

0/150

提交評(píng)論