专科毕业论文题目：基于单片机的数字电压表系：信息工程系专业：电气自动化技术专业班级：学生：学号：指导教师：职称：基于单片机的数字电压表摘要本文介绍一种基于89S52单片机的一种电压测量电路,该电路采用ICL7135专科毕业论文高精度、双积分A/D转换电路，测量范围直流0-±2000伏，使用LCD液晶模块显示，可以与PC机进行串行通信。正文着重给出了软硬件系统的各部分电路，介绍了双积分电路的原理，89S52的特点，ICL7135的功能和应用，LCD1601的功能和应用。该电路设计新颖、功能强大、可扩展性强。关键词：电压测量ICL7135双积分A/D转换器1601液晶模块ABSTRACTTheintroductionofacost-based89S52MCUavoltagemeasurementcircuits,thecircuitsusedICL7135high-precision,dual-scoringA/Dconversioncircuits,measuringscopeDC0-2000volts,theuseofLCDthatcanbecarriedoutwithaPC第2页共35页专科毕业论文serialcommunications.Thepaperfocusesonprovidingasoftwareandhardwaresystemcomponentscircuit,introduceddoubleintegralcircuittheory;89S52featuresICL7135functionsandapplications,LCD1601functionsandapplications.Thecircuitdesignnovel,powerful,canbeexpansionarystrong.Keywords：VoltagemeasurementICL713589S52LCD1601目录引言...................................................................................................................4第一章课题概况..........................................................................................5第二章系统硬件部分方案设计............................................................62.1输入电路................................................................................................62.2A/D转换电路.......................................................................................62.2.1双积A/D转换器的工作原理..............................................7第3页共35页专科毕业论文2.2.27135的应用..............................................................................82.3单片机部分...........................................................................................112.4液晶显示部分......................................................................................122.4.11601使用说明.......................................................................122.4.2液晶显示部分与89S52的接口........................................152.5通讯模块..............................................................................................16第三章系统软件部分方案设计............................................................173.1主程序设计.............................................................................................173.2A/D中断程序设计...............................................................................193.3通讯模块程序设计...............................................................................20第四章总结与展望.....................................................................................22参考文献............................................................................................................22附录A................................................................................................................23附录B................................................................................................................23致谢.....................................................................................................................31第4页共35页专科毕业论文引言数字电压表（DigitalVoltmeter）简称DVM，它是采用数字化测量技术，把连续的模拟量...
