振弦式传感器测力研究

XXXX大学毕业论文论文题目：振弦式传感器测压力研究姓名XXX学院XXXXXXXXXXXX专业XXXXXXXX班级XXXXXX指导教师XXXXXX2013年06月05日太原科技大学毕业论文I振弦式传感器测压力研究摘要在大型土木工程的安全监测中，压力作为一个重要的参数，其检测方法一直备受重视。通过对各种结构所受压力的实时检测，对于保障其健康、降低事故发生率有重要的意义。由于振弦式传感器具有输出信号稳定、易检测等诸多优点，本文选用振弦式传感器。本文首先对常用的测压力传感器进行了比较，阐述了选用振弦式频率传感器的依据,分析了传感器的结构和工作原理，总结了振弦传感器测力研究中影响测量精度的主要因素，并提出了相应的解决措施。重点对传感器的激振方式进行了研究和优化，采用了反馈式的激振新方法,设计了合理的信号处理电路。关键词：振弦式传感器；压力检测；激振方式太原科技大学毕业论文IIResearcherofMeasuringForceBasedonVibratingWireSensorAbstractInthesecuritymonitoringoflargecivilengineering,Asanimportantparameterthemethodsofpressuremeasurementhavealwaysbeenpaidgreatattention.Ithasanimportantsignificanceforprotectingtheirhealthandreducingtheaccidentrate,throughmonitoringthepressureofvariousstructuresonreal-time.Becauseoftheadvantagesofvibratingwiresensorssuchasoutputsignalstability,easytodetectandsoon.Firstly,thepapercomparewithcommonusedpressuresensors,explainthebasisofselectingthevibratingwiresensor,analyzeitsstructureandworkingprinciple,summarizetheforemostfactorsthatinfluencethemeasuringaccuracyofvibratingwiresensors,proposesomecorrespondingimprovedmethods.Theexcitingmethodsofvibratingwiresensorarestudiedandoptimizedmainly,anewexcitingmethodbasedonfeedbackisusedandarationalsignalprocessingcircuitisdesignedinthepaper.Keywords:vibratingwiresensor；pressuremeasurement；excitingmethods太原科技大学毕业论文III目录摘要................................................................................................................................IAbstract..........................................................................................错误！未定义书签。第1章绪论..................................................................................................................11.1传感器的基础知识..........................................................................................11.2振弦式频率传感器..........................................................................................21.3本文研究的目的和意义..................................................................................2第2章振弦式传感器的工作原理................................................................................42.1压力传感器的选取........................................................................................42.2振弦传感器的结构和工作原理....................................................................62.2.1振弦传感器测量压力的理论依据.......................................................72.2.2振弦传感器的类型.............................................................................102.3影响振弦传感器测量精度的因素................................................................12第3章激振方式和电路..............................................................................................143.1激振模块设计................................................................................................143.1.1振弦传感器激振方式.........................................................................143.1.2本文激振方式.....................................................................................163.2测振模块设计................................................................................................193.2.1滤波电路的设计.................................................................................203.2.2放大电路和信号调理电路.................................................................22第4章振弦式传感器在测压力方面的应用............................................................244.1振弦式土压力计............................................................................................244.1.1用途.....................................................................................................244.1.2结构及工作原理.................................................................................244.2孔隙水压力计...............................................................................................254.2.1用途.....................................................................................................254.2.2结构及工作原理.................................................................................264.3振弦式锚索测力计........................................................................................274.3.1用途.....................................................................................................274.3.2结构及工作原理.................................................................................27致谢............................................................................................................................30附录............................................................................................................................32太原科技大学毕业论文IV附录Ⅰ英文原文.................................................................................................32附录II中文译文................................................................................................38太原科技大学毕业论文1第1章绪论1.1传感器的基础知识传感器是人类探知自然界信息的触角。特别是在科学研究和工程应用中，要获得精确、可靠的信息，就必须要借助传感器技术。随着信息时代的来临，传感器己经广泛地被用于测量与数据采集、诊断与监测、环境保护、家用电器等各个工业领域。传感器技术已经成为构建现代信息技术的三大支柱之一]1[。压力传感器作为传感器大家庭中的一个主要成员，在实际中有着广泛的应用前景]3[。通常力传感器由三部分组成:敏感元件、转换元件和转换电路。其工作原理框图如图2-1所示。图2-1压力传感器工作原理框图其中，敏感元件是直接感受被测量的器件，它的输出是与被测量成一定关系的某一物理量;转换元件是将敏感元件感受或响应的被探测物理量转