基于虚拟仪器的液体流量监控设计

摘要I摘要目前，随着人类科学技术不断地进步发展流体流量的测量在工业生产和过程控制中占有重要地位。由于流体性质、流动状态、流动条件以及感测机理的复杂性，造成了如今流量测量仪表的多样性、专用性和价格差异的悬殊性。流量参数可谓工业生产过程、科学实验计量和进行各种经济核算所必须的重要参数，是能源计量的重要组成部分。特别是在热电厂、石油、矿山、冶金、航空、机械等领域，现在又扩展到医疗器械等领域。通过流体流量的测量，人们可以了解掌握流动过程、进行生产工艺的自动控制、实行能源管理。本论文以GLW4型传感器和NIPCI-6024E数据采集卡技术为核心并与LabView电子技术相结合，设计出一种技术水平较好的液体流量测量监控系统。其中选用GLW4型传感器具有测量精度高，工作稳定、可靠等优点，常用于矿井抽放防泵站或移动抽放泵供水流量的实时监测，以及矿井供水流量的监测、计量，为后继自动化处理设备提供实时可靠的流量数据。产品特点：测量精度高，重复性好；结构紧凑，轻巧，安装维护方便，流通能力大；良好的抗震性能；允许工作温度范围宽；测量范围宽，现场显示流量值；采用红外遥控方式设置参数；当流量超限时，可以声光报警信号，高限报警和低限报警可以随意调校；输出信号可选200Hz～1000Hz或1mA～5mA；寿命长、操作维护简单等特点。关键词：液体流量监控，GLW4传感器，NIPCI-6024E数据采集卡，LabView西安交通大学城市学院本科生毕业设计（论文）IIABSTRACTIIIABSTRACTAtpresent,themeasurementofhumanscienceandtechnologycontinuetoprogressanddevelopmentoffluidflowplaysanimportantroleintheindustrialproductionandprocesscontrol.Becauseofthecomplexityofthefluidproperties,flowstate,flowconditionsandthesensingmechanism,causenowdiversity,flowmeasuringinstrument,specificityandthepricedifferencebetweenthe.Theimportantparameterswhichmustflowparametersisindustrialproductionprocess,scientificexperimentmeasurementandvariouseconomicaccounting,isanimportantcomponentofenergymetering.Especiallyinthefieldofthermalpowerplant,petroleum,mine,metallurgy,aviation,machinery,andnowextendedtomedicaldevicesandotherfields.Throughthemeasurementoffluidflow,peoplecanunderstandtheflowprocess,theproductionprocessoftheautomaticcontrol,theimplementationofenergymanagement.Inthisthesis,GLW4sensorandNIdataacquisitioncardPCI-6024Etechnologyasthecore,combinedwithLabViewtechnology,designagoodtechnicalleveloftheliquidflowmeasurementmonitoringsystem.TheselectionofGLW4typesensorhastheadvantagesofhighmeasurementaccuracy,stable,reliable,commonlyusedintheminegasdrainagepumpingstationormobiledrainagepumpwaterflowofreal-timemonitoring,andminewaterflowmonitoring,metering,providereal-timetrafficdatareliableforsubsequentautomaticprocessingequipment.Productfeatures:highaccuracy,goodrepeatability;hastheadvantagesofcompactstructure,light,convenientinstallationandmaintenance,largeflowcapacity;goodseismicperformance;allowsawiderangeofworkingtemperature;widemeasuringrange,fielddisplayflowvalue;usingtheinfraredremotecontrolparametersset;whentheflowexceedsthelimit,cansoundandlightalarmsignal,highlimitalarmandlowlimitalarmcanbearbitrarilyadjusted;optionaloutputsignal200Hz~1000Hzor1mA~5mA;longservicelife,simpleoperationandmaintenanceetc..KEYWORDS:Liquidflowmonitoring,GLW4sensor,PCI-6024Edataacquisitioncard,LabView西安交通大学城市学院本科生毕业设计（论文）IV目录V目录摘要.........................................................................................................................IABSTRACT..........................................................III第1章绪论...................................................................................................................11.1课题背景..........................................................................................................11.2选题意义..........................................................................................................11.3国内外发展现状..............................................................................................11.4本论文所做的工作..........................................................................................31.5论文的主要难点..............................................................................................31.6本章小结..........................................................................................................3第2章测量设计的基本原理.......................................................................................52.1传感器..............................................................................................................52.2数字采集卡......................................................................................................62.2.1信号类型...............................................................................................62.2.2测量方式...............................................................................................62.2.3数字I/O................................................................................................72.2.4计数器...................................................................................................82.3虚拟仪器..........................................................................................................82.3.1虚拟仪器的介绍...................................................................................82.4本章小结........................................................................................................12第3章测量流量系统的设计.....................................................................................133.1流量传感器的选型........................................................................................133.2安装使用........................................................................................................143.3输出特性........................................................................................................153.4数据采集卡.................................