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1、本科学生毕业设计基于电容传感器的大坝测压管水位测试系统院系名称：电气与信息工程学院专业班级：测控技术与仪器08-1班学生姓名：马超指导教师：吴东艳职称：进胚黑龙江工程学院二O—二年六月TheGraduationDesignforBachelor'sDegreeTheTestSystemofDamPiezometricWaterLevelBasedonCapacitiveSensorsCandidate:MaChaoSpecialty：Measurement——ControlTechnologyandInstrumentationClass：08-1Supervisor：Lectu
2、recWuDongyanHeilongjiangInstituteofTechnology2012-06Harbin摘要大坝水位的安全性关系到人民的财产安全和工程效益，大坝安全监测是水库工程管理工作中最重要的一项工作。随着科学技术的发展，大坝水位监测已经从传统的人工监测更替到了用先进的智能仪器来监测。基于电容传感器的大坝测压管水位测试系统基于51单片机,CAV4I4电容转换电路以及A/D转换电路，并由数码管显示水位高度，不仅能实现利用RS-485总线接口与PC机构成主从式大坝水位监测网络，网络最多可监测几百个节点的水位，监测距离达几公里；而且可以根据水位实测值与人工设定的超限制或
3、相关数据模型进行对比分析，若实测值超过设定的范围，则蜂鸣器鸣叫报警，通知值班人员。木设计提高了观测数据的及时性、准确性、可靠性，并且大人减轻测量者的劳动强度，提高了工作效率，对大坝工事的安全运行和发挥水利工程效益具有十分重要的意义。关键词：大坝水位；电容传感器；51单片机；RS-485总线；主从式ABSTRACTTiltmeasuringisanexpertisethatcanbeusedinmakingsuretheinclineofthespatialobjects.TiltsensorbasedonMEMSandMCUtechnologycanbeusedinautomat
4、ion,engineeringmachinery,medicalequipment,etc.Asapromisingfieldbus,CANbushassomeoutstandingcharacteristics,suchasrealtime,reliableandflexible.Itcausestherevolutionagainstthetraditionalcontrolsystemstructure,thenthenewstylenetwork-integratedwhollydistributedcontrolsystemcomesintobeing,andCANis
5、thetypicalrepresentative.Withtheinclinemeasuringtechnologyandfieldbustechnologyintegratingandtheintelligentsensorresearch,inclinefieldbusmeasurecancomeintowork,anditwilltakeanengineeringappliancefutureintheindustrycontrolfield・Inthispaper,theMEMSaccelerometerandCANaretheresearchobject.Thesens
6、orperformanceandCANnodehavebeenstudiedinthesysteminwhichC8051F040isthemaincontrolle匸Thetilt/accelerationsensoroutputissenttotheSCMdevelopmentboardbySPI,afterpassingthelowpassfilterandADC.SCM,whichintegratestheCANcontroller,doesthedigitalfilterandnonlinearcompensationjob,andsendsthefinaldatato
7、thePCnodeinCANnetwork.Themainworkcontainsthehardwaredesignandthesoftwaredesign.Intheformer,thesensorcircuitincludingthelowpassfilterandADC,andtheSCMcircuitincludingCANinterfacearedesigned.Inthelatter,theSPICommunication,digitalfilter,nonlinea
