基于51单片机的流水线产品计数器设计论文.doc

....PAGEIV/NUMPAGES22....毕业设计（论文）基于51单片机的流水线产品计数器设计班级:31001班学号:1姓名:唐树春专业:应用电子技术指导老师:周晓红老师二零一二年六月十日摘要本系统采用的是以单片机STC89c52为核心的光电计数器。其工作原理是采用单片机的外部中断0来进行计数，数据采集部分采用反射式光电传感器，将红外发光管与光电接收管相邻安放，每当物体通过一次，红外光就被物体反射，光电接收管接收一次，光电接收管的输出电压就产生一个变化，这个变化的电压信号通过放大和处理后，形成计数脉冲，输入至STC89c52单片机的P3.2口，通过软件控制和硬件控制并用LED加以显示，便可实现对物体的计数统计。本计数器可将机械或人工计数方式变为电子计数，并且采用LED数码管显示，可适用于诸多行业，以满足现代生产、生活方式的需求。所谓的光电式传感器是将光信号转化为电信号的一种传感器。光电式传感器是以光电器件作为转换组件的传感器，光电检测方法具有精度高、应用快、非接触等优点，而可测参数多，光电传感器的结构简单，形式灵活多变因此，光电式传感器在检测和控制中应用非常广泛。关键词：计数器；光电传感器；单片机；LED数码管AbstractThissystemUSESiswithSTC89c52singlechipmicrocomputerasthecoreofthephotoelectriccounter.TheworkingprincipleofadoptingSCMexternalinterruption0tocount,thedataacquisitionofthereflectingphotoelectricsensor,theinfraredlighttubeandphotoelectricreceivingtubeadjacentput,whenevertheobjectthrougha,infraredlightisobjectreflective,photoelectrictubereceivingareceiving,photoelectricreceivingtubeistheoutputvoltageofproduceachange,thechangesofthevoltagesignalthroughtheamplifierandprocessing,formcountpulse,theinputtoSTC89c52SCMP3.2mouth,throughthecontrolsoftwareandhardwarecontrolandthatLEDto,canrealizetheobjectcountingstatistics.Thiscountercanormechanicalartificialcountwayintoelectroniccounted,andusingLEDdigitaldisplaytube,canbeusedinmanyindustries,tomeetthemodernproduction,thewayoflifeofdemand.Theso-calledphotoelectricsensorislightsignalsareconvertedtoelectricalsignalsasensor.Photoelectricsensorisbasedonphotoelectricdeviceasaconversionofcomponentsofthesensor,photoelectricdetectionmethodhashighaccuracy,application,theadvantagesoffastcontact,andcanbemeasuredparameters,thestructureofthephotoelectricsensorissimple,flexibleinformso,photoelectricsensorinthedetectionandcontroliswidelyused.Keywords:counter;Photoelectricsensor;microcomputer;LEDdigitaltube目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc327715470"摘要PAGEREF_Toc327715470\hIHYPERLINK\l"_Toc327715471"AbstractPAGEREF_Toc327715471\hIIHYPERLINK\l"_Toc327715472"第1章绪论PAGEREF_Toc327715472\h1HYPERLINK\l"_Toc327