高抗干擾智能型渦街流量計的研究.pdf

1、浙江大學碩士學位論文高抗干擾智能型渦街流量計的研究姓名：徐國梁申請學位級別：碩士專業(yè)：機械電子工程指導教師：宋開臣20030101AbstractVortexflowmeterisdesignedonthebasisofKarmanvortexstreetprincipleBecauseofexcellingothersinsomeaspects，itdevelopsspeedilyfromI970’SRelevantdataindic

2、atesthattheproportionoftheuseofvortexflowmeterincreasesconsiderablyindevelopedcountries，suchasJapan，EuropeanandAmericancountriesinrecentyearsanditiswidelyappliedtovariousfieldsVortexflowmeterwillplayaleadingroleinallkind

3、sofflowmetersinthefutureButexistingvortexflowmeterhasitsowndisadvantageItsnoiseimmunityispooranditslowerlimitofmeasuringrangeishighThisthesiswillresearchintothisproblemInchapterone，thethesisexpoundstherecentdevelopmentsi

4、nflowmeasuring，anddescribestheoperationalprinciple，advantagesanddisadvantagesofthevortexflowmeter，andthecurrentresearchonitTechnicalproposalisalsogiveninthischapterInchaptertwo，describesthecomponentofthevortexflowmeter，a

5、nddeterminestousetriangularprismasvortexgeneratorandpiezocrystalasStressdetectingsensorAnoveltypeofvortexsensorwithsuspendingdifferentialstructureisbroughtforwardThenthisthesisanalyzesitsoperationalprincipleTheexperiment

6、resultisideal，Inchapterthreedescribesthelimitationofthecurrentmethodinvortexsignalprocessing，determinestousespectralanalysistechnologyforsignalprocessingAnalyzesthecharacteristicsofvortexsignal，designsadifferentialcharge

7、amplifierwithgainadaptivefunction，andanalyzesitsoperationalprincipleInchapterfourselectsperiodogramrealizesthepowerspectrumanalysis，takeadvantageofRadix一4algorithmtocalculateFFT，anddescribestherealizationinMCUThevortexfl

8、owmeterdesignedinthisprojecthasexcellentnoiseimmunityandwidemeasuringrangeratioInchapterfive，describesthelow—powerrealizationbyuseofmodemlowpowertechnologySothevortexflowmeterCarlbesuppliedbydrybakeryandappliedinthezonew