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基于LabVIEW的增压压力传感器检测试验台测控系统设计┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊I摘要增压压力传感器是一种绝对压力传感器，它是汽车发动机电控单元用于实时监测涡轮增压器增压压力的重要元器件。其作用是将涡轮增压器后方空气的绝对压力转化为电信号，发送给电控单元（ECU），电控单元将此电信号与根据发动机工况得出的理论增压压力作比较，不断调节涡轮增压器的可变喷嘴截面积或者旁通放气阀以使实际增压压力达到最佳。可见增压压力传感器质量精度等性能的好坏对汽车发动机能否达到最佳工作状态有着很大的影响，故而有必要对企业所生产的增压压力传感器产品性能进行评估检测。本课题的研究内容是增压压力传感器检测试验台测控系统的设计（主要任务是测控系统的软件设计）。本论文采用虚拟仪器技术，以LabVIEW为平台，结合增压压力传感器特性曲线特点，开发了一套计算机软件测试系统。并且本文还简要介绍了增压压力传感器测试系统的硬件设备组成及相关原理，用以对今后测控系统软硬件搭配的实现做铺垫。具体地说，本论文的主要工作有以下几个方面：1.虚拟仪器技术与LabVIEW简介；2.增压压力传感器的简介；3.基于LabVIEW的增压压力传感器试验平台的硬件及软件设计；4.系统测试及结论。关键词：增压压力传感器，检测，LabVIEW，软件设计基于LabVIEW的增压压力传感器检测试验台测控系统设计┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊IIABSTRACTThesuperchargingpressuresensor,alsoknowastheabsolute-pressuresenor,isaimportantcomponentofelectroniccontrolunitontheautomotiveengineforreal-timemonitoringturbochargerboostpressure.Itcantransformtheabsolute-pressureofairbehindtheturbochargerintoelectricalsignalswhichwouldbesenttotheelectroniccontrolunit(ECU).Electroniccontrolunitcomparesthiselectricalsignalwiththetheorysuperchargingpressureresultedfromengineoperatingconditions,andcontinuouslyadjuststheturbochargervariablenozzlecross-sectionalareaorthebypasspurgevalveinordertomaketheactualsuperchargingpressureachievethebestperformance.Thequalityandaccuracyofsuperchargingpressuresensorhaveagreatimpactonautomobileengineachievingthebestworkingcondition,thereforeitisnecessarytoassesstheperformanceofsuperchargingpressuresensor.Theprojectcontentistodesignsuperchargingpressuresensormeasurementandcontrolsystem(themaintaskistodesignthesoftwareofmeasurementandcontrolsystems).ThispaperusesthevirtualinstrumenttechnologytoLabVIEWplatform,combinedwiththesuperchargingpressuresensorcharacteristics,thedevelopmentofasetofcomputersoftwaretestingsystem.Anditalsobrieflydescribesthehardwarecompositionofthesuperchargingpressuresensortestsystemandtherelevantprinciples,forpavingthewaytotheimplementationofthefuturemeasurementandcontrolsystemaboutthecollocationbetweensoftwareandhardware.Specifically,thisthesisworkmainlyinthefollowingareas:1.briefintroductionofvirtualinstrumenttechnologywithLabVIEW;2.briefintroductionofsuperchargingpressuresensor;3.experimentalplatformbasedonLabVIEWsuperchargingpressuresensorhardwareandsoftwaredesign;4.systemtestsandconclusions.KEYWORDS:superchargingpressuresensor,detect,LabVIEW,test,softwaredesign基于LabVIEW的增压压力传感器检测试验台测控系统设计┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊III目录摘要......................................................................................................................................IABSTRACT..........................................................................................................................II第一章绪论.......................................................................................................................11.1课题的提出及意义..................................................................................................11.1.1汽车电子技术的应用....................................................................................11.1.2发动机涡轮增压技术的应用........................................................................21.2传感器检测试验台测控系统的发展状况..............................................................31.3LabVIEW软件..........................................................................................................41.4增压压力传感器......................................................................................................51.4.1增压压力传感器简述....................................................................................51.4.2增压压力传感器的工作原理........................................................................61.5研究目的及主要工作..............................................................................................7第二章系统方案设计及试验台构成...............................................................................92.1测试系统要求..........................................................................................................92.1.1测试参数........................................................................................................92.1.2测试功能........................................................................................................92.2系统结构设计..........................................................................................................92.3试验台总体要求....................................................................................................102.4试验台组成............................................................................................................112.4.1空压机..........................................................................................................112.4.2真空泵..........................................................................................................122.4.3加压阀..........................................................................................................132.4.4降压阀..........................................................................................................152.4.5控制台.................................