电路的RLC测量

本科毕业设计论文题目：工频电路的RLC测量系别：电气与信息工程系专业：电气工程及其自动化班级：电气102学号：学生姓名：李佑辰指导老师：申2015年6月西安交通大学城市学院本科毕业生论文摘要I摘摘要要随着智能科技的不断发展，电子器件的需求急剧增加，应用范围也逐渐广泛了，在日常工作和学习中常常要检测电阻，电容，电感的大小。另外，随着测量技术和手段的飞速发展，人们对于器件参数的测量精度提高了要求，现在教学实验中普遍使用的万用表已不能满足人们需求的测量精度，因此设计可靠，安全，便捷，测量精度更高的电阻，电容，电感测试仪具有广泛的使用价值和应用前景。本文以51单片机为核心。测量电阻和电容以NE555芯片为核心构建震荡电路，再根据电容的充放电过程，使得电路输出矩形波。测量电感的测量是采用电容三点式振荡电路，与发射级相连的两个电抗元件同为电容式的三点式振荡电路，射同基反的原则成为电容三点式振荡电路，同时也输出矩形波，这样把所得的波形送给单片机，通过51单片机的定时、计数功能计算出矩形波的频率，再通过公式计算出电阻、电容、电感的数值，并送于LCD1602显示。关键词：RLC测量仪，NE555，51单片机，LCD1602西安交通大学城市学院本科毕业生论文IIABSTRACTIIIAABBSSTTRRAACCTTWiththedevelopmentofintelligentscienceandtechnology,thedemandofelectronicdevicesareincreasingsharply,itsapplicationmuchwider,andweneedtodetectresistance,capacityandinductanceinourdailylifeandstudy.Besides,asthemeasurementtechnologyandmethoddevelopingfast,themeasurementaccuracyofblockparametersarehigher,thewidelyusedmulti-meterinteachingexperimentcannotmeetthesettingmeasurementaccuracy.Therefore,itwillhavepracticaluseandprospectstodesignreliable,saferconvenient,andhigheraccuracymeasurementdevicestodetectresistance,capacityandinductance.Thepaperisfocusedon51Microcontrollers,,buildingoscillationcircuitbasedonNE555chiptomeasureresistanceandcapacity,makingcircuitexportingrectanglewaveviatheprocessofthecharginganddischargingofelectriccapacity.Thedetectofinductanceadoptthreepointtypeoscillationcircuitelectriccapacity,exportingrectanglewaveatthesametime.thustransmittingthewavetoMicrocontrollers,figuringoutthefrequencyofrectanglewavethroughsetting,countingfunctionof51Microcontrollers,andthengetsthefiguresofthethreeabovebyformula,conveystotheLCD1602todisplay.KEYWORDS：RLCmeasuringdevice，NE555，MCS-51，LCD1602西安交通大学城市学院本科毕业生论文VI绪论1目目录录摘要..........................................................................................................ⅠABSTRACT........................................................................................................Ⅲ第1章.绪论......................................................................................................11.1课题的背景及意义..............................................................................11.2课题的国内外研究现状.......................................................................11.3本章小结.............................................................................................2第2章.系统的总体设计....................................................................................32.1设计要求及任务..................................................................................32.1.1主要任务..................................................................................32.2.2技术要求..................................................................................32.2方案比较.............................................................................................42.3方案论证.............................................................................................52.3.1总体思路..................................................................................52.4本章小结.............................................................................................5第3章.电路的硬件设计与说明.........................................................................73.1555NE芯片的介绍.............................................................................73.1.1555NE芯片的引脚功能............................................................73.1.2555NE的工作原理...................................................................83.2测量电阻的电路设计...........................................................................93.2.1用555NE时基电路构成多谐振荡器..........................................93.2.2测量电阻的电路模块...............................................................113.3测量电容的电路设计.........................................................................123.4测量电感的电路设计.........................................................................133.551单片机系统的硬件电路设计.........................................................143.5.1单片机结构介绍......................................................................143.5.25289CMCS单片机的特点..................................................15西安交通大学城市学院本科毕业生论文VI3.5.3总线结构................................................................................183.5.451单片机最小系统的设计......................................................183.5.5显示电路的设计......................................................................203.5.6键盘电路的设计......................................................................223.5.7多路选择开关的设计...............................................................233.6本章小结...........................................................................................24第4章.电路的软件设计与说明.......................................................................254.1I/O口的分配.....................................................................................254.2主程序流程图....................................................................................264.3本章小结...........................................................................................27第5章.系统的仿真与调试...............................