船舶柴油機示功圖測量系統(tǒng)研制.pdf

1、武漢理工大學(xué)碩士學(xué)位論文船舶柴油機示功圖測量系統(tǒng)研制姓名：曹國豪申請學(xué)位級別：碩士專業(yè)：控制理論與控制工程指導(dǎo)教師：楊建國20090501武漢理工大學(xué)碩士學(xué)位論文AbstractIndicatordiagramofcylinderpressureisthebasicmethodtodescribethedynamicperformanceofdieselengineIt’Sthebasisforinternalcombustioneng

2、ine’Sperformanceparametercalculationandheatreleaserateanalysis，andIt’Salsotheevaluationstandardfortheaccuracyofsimulationcalculateofinternalcombustionengine’ScombustionprocessSomeasuringtheindicatordiagramaccuratelyplays

3、animportantroleInviewofthis，inthispaperwedevelopedaindicatordiagrammeasurementsystemformarinedieselengineItisconsistedofsensorsignalconditioningcircuit，singlechipcomputerdataacquiringsystem，hostcomputerandtestingsoftware

4、Thefollowingcontentsweremainlyresearched(1)Accordingtotherequestofexternaltriggersignalforsinglechipcomputerdataacquiringsystemandtherequestofindicatordiagram，Wedesignedasignalconditioningandfrequencymultiplecircuitfordi

5、fferenttypeofsignalAndalsowedesignedasignalisolationcircuit(2)WedesignedthedataacquiringsystembaseonsinglechipcomputersystemtosamplethecylinderpressureofdieselengineAndthecollecteddataweretransmittedtothehostcomputerorus

6、bdiskbyserialcommunication(3)UsingvirtualinstrumenttechnologyandLabVIEWgraphicalprogramminglanguagecompiledtheindicatordiagrammeasurementsystemprogramwhichcandothepost。processingandanalyzingtothecollectedsignals，thenacco

7、rdingthemeasuredindicatordiagramwecancomputeouttheenginesperformanceparametersSuchasmeanindicatedpressure，indicatedpowerexplosionpressureandthecorrespondingcrankangle，ratioofpressureriseandSOon(4)Themeasuresystemwedevelo

8、pedwastestedonthetypeof8L21／31dieselengine，verifiedthefunctionandprecisionofthesystemThisdevelopedsystemhasthecharacteristicsofdataacquisitionaccuratelysteadyperformance，stronganti—interferenceabilityandSOonItprovidesame