河北大学2009届本科生毕业论文（设计）电脑质量流量计硬件设计摘要本系统的研究课题为电脑质量流量计硬件设计，本系统利用80C51单片机做为微控制器，并利用ACD0809做为模拟信号量的转换芯片。由于80C51容量有限，本系统还使用了2764做为片外程序存储器的扩展芯片，使用6264做为片外数据存储器的扩展芯片，本系统还扩展了键盘和LED静态显示电路，LED静态显示器使用了8255可编程并行接口芯片作为并行接口，使用了8253可编程定时器/计数器做为脉冲的计数器。本系统使用的温度传感器是铂热电阻，可将对温度的测量转换成对电阻阻值的测量。使用的体积传感器是涡轮流量计，可将对体积的测量转换成脉冲计数。本系统的测量原理大致如下：通过8253对涡轮流量计的脉冲的计数，产生的中断做为系统的运行的根据，根据中断源进行测量与中断源有关的数据并进行对数据的处理与计算。关键词：芯片传感器测量原理中断ABSTRACTThissystemicinvestigationproblemisthedesignofcomputerhardwareoncalculatingqualityandflowofliquid.Thissystemuses80C51asthesingle-chipmicrocontroller,andusesACD0809astheanalogsignalconversionchip.Duetothelimitedcapacityof80C51,thesystemalsousesa2764programmemorychipanda6264datamemorychipastheexpansionsofthesystem.ThesystemalsoextendskeyboardcircuitandstaticLEDdisplaycircuit.StaticLEDdisplaycircuituses8255programmableparallelinterfacechipasparallelinterface.Thesystemuses8253programmabletimer/counterchipasapulsecounter.ThesystemusesthetemperaturesensorwhichisaplatinumRTDtomeasurethetemperature,andthetemperaturecanbeconvertedintothemeasurementofresistance.Thevolumemeasurementsensorusesturbineflowmeter,withwhichthemeasurementofthevolumecanbeconvertedintopulsecount.Themeasuringprincipleofthesystemisasfollows:Disruptionarisedfromtheadoptionof8253whichcountstheturbineflowmeterpulse,isthebasisforthesystemoperation.Inaccordancewiththeinterruptsource,thesystemmeasuresanddoesthedataprocessingandcomputingwhichassociatewiththeinterruptsource.Keywords:chipsensormeasuringprincipleinterruption目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc231188381"一概述PAGEREF_Toc231188381\h1HYPERLINK\l"_Toc231188382"1.1引言PAGEREF_Toc231188382\h1HYPERLINK\l"_Toc231188383"1.2功能介绍PAGEREF_Toc231188383\h1HYPERLINK\l"_Toc231188384"二功能说明PAGEREF_Toc231188384\h3HYPERLINK\l"_Toc231188385"2.1题目介绍PAGEREF_Toc231188385\h3HYPERLINK\l"_Toc231188386"2.2电路分析PAGEREF_Toc231188386\h3HYPERLINK\l"_Toc231188387"2.2.1温度传感器PAGEREF_Toc2311883