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金肯职业技术学院毕业设计（论文）题目基于数字电路4路智力抢答器的设计与实现计算机通信工程系电气自动化技术专业09级姓名焦双银学号0703040404指导教师顾亚文二0一0年一月十三日2目录第一章概述..................................................................................................................51.1数字电路简介..................................................................................................51.2抢答器简介......................................................................................................6第二章方案的选择......................................................................................................72.1系统的任务需求..............................................................................................72.2系统设计方案分析..........................................................................................72.2.1基于单片机的方案...............................................................................82.2.2基于PLC的方案.................................................................................92.3方案的确定....................................................................................................102.4本章小结........................................................................................................10第三章抢答器硬件系统的设计................................................................................113.1硬件总体方案................................................................................................113.2器件的选择...................................................................................................123.2.1主器件的选择....................................................................................123.2.2其它器件的选择.................................................................................133.3I/O分配与电气接口图.................................................................................133.4硬件接线图....................................................................................................163.5本章小结........................................................................................................16第四章抢答器软件系统的设计................................................................................174.1软件的总体方案...........................................................................................174.2灯控系统的软件方案...................................................................................184.2.1灯控波形图........................................................................................184.2.2灯控梯形图程序................................................................................194.3数码管显示系统的软件方案.......................................................................204.3.1真值表与逻辑表达.............................................................................204.3.2数码管的梯形图.................................................................................224.4本章小结........................................................................................................25第五章抢答器硬件电路板的制作和软硬件的调试................................................265.1电路板的制作过程........................................................................................265.2调试过程与成果展示....................................................................................265.3本章小结........................................................................................................27总结..............................................................................................................................28致谢..............................................................................................................................29参考文献......................................................................................................................303基于PLC的三路智力抢答器的设计与实现专业班级：电气自动化技术四班学生姓名：项超超指导教师：顾亚文摘要本文利用三菱FX2N系列PLC对知识竞赛抢答器的控制,阐述了控制方案。实现抢答器功能的方式有多种，可以采用早期的模拟电路、数字电路或模数混合电路。近年来随着科技的飞速发展，单片机、PLC的应用不断地走向深入，同时带动传统的控制检测技术的不断更新。本文采用日本三菱公司生产的FX2N-48MR型PLC作为核心控制器进行三路抢答器系统的设计，并且设计出了系统结构图、程序指令、梯形图以及输入输出端子的分配方案。同时根据知识竞赛抢答器的控制要求和特点,确定PLC的输入输出分配,并进行现场调试。关键词：PLC；智力抢答器；程序设计4PLC-basedthree-wayintellectualDesignandImplementationofResponderAbstractInthispaper,theknowledgeofMitsubishiFX2NSeriesPLCcontestRespondercontrol,describedcontrolprogram.AchievetheResponderfunctionindifferentways,canbeusedearlyanalogcircuits,digitalcircuitsorthenumberofmixed-modecircuits.Inrecentyears,withtherapiddevelopmentofscienceandtechnology,Microcontroller,PLCapplicationscontinuetomovetowardin-depthatthesametimepromotethetraditionalcontroldetectiontechnologyconstantlyupdated.Inthispaper,producedbyJapan'sMitsubishiFX2N-48MR-PLCasthecorecontroller,three-wayRespondersystemdesign,anddesignofthesystemstructurediagram,programinstructions,ladder,aswellasinputandoutputterminalsofthedistributionprogram.ResponderKnowledgeCompetitionunderboththecontrolrequirementsandcharacteristicstodeterminethePLCinputandoutputdistributionandon-sitecommissioning.Keywords:PLC;intellectualResponder;Programming5第一章概述1.1PLC简介国际电工委员会（IEC）于1987年对PLC定义如下:PLC是专为在工业环境下应用而设计的一种数字运算操作的电子装置,是带有存储器,可以编制程序的控制器。它能够存储和执行指令,进行逻辑运算,顺序控制,定时,计数和算术等操作,并通过数字式和模拟式的输入输出,控制各种类型的机械和生产过程。