武汉理工大学课程设计
目 录
摘 要 ················································································································· 2 ABSTRACT ······················································································································· 3 一 Multisim软件介绍 ·························································································· 4
1.1 EDA技术概述·································································································· 4 1.2 Multisim特点 ····························································································· 4 1.3 Multisim 分析方法 ···················································································· 5 二 课程设计题目分析 ······························································································· 6
2.1 设计要点········································································································· 6 2.2 工作原理········································································································· 6 三 电路的设计及工作原理 ····················································································· 8
3.1电路功能显示部分·························································································· 8 3.2串口程序下载电路部分·················································································· 9 3.3单片机最小系统···························································································· 11 3.4系统客户服务部分························································································ 13 3.5电路工作原理································································································ 13 四 系统仿真 ············································································································· 14
4.1系统仿真图···································································································· 14 五 体会感受 ··············································································································· 15 六 元件清单 ··············································································································· 16 七 参考书目 ··············································································································· 17 八 附录 ··················································································································· 18
源程序··················································································································· 18
武汉理工学《数字电子技术》课程设计说明书
摘 要
叫号机又称排队机，是一种综合运用计算机技术、网络技术、多媒体技术、
通讯控制技术的高新技术产品，能有效地代替客户进行排队，适用于各类窗口服务行业，目前已经广泛应用于银行、医院等行业。使用叫号机系统，一方面可消除客户长时间“站队”的辛苦、对“站错队”、“插队”的抱怨，全面改善服务质量和企业形象，另一方面更可以依据统计数据调整业务分配、挖掘潜力、合理安排窗口服务，减少群众的等候时间，提高办事效率。
关键字：叫号机、排队、顾客。
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武汉理工学《数字电子技术》课程设计说明书
ABSTRACT
Calls a number machine calls lining up machine.It is one kind of synthesis utilization computer technology, the networking, the multimedia technologies and the communication control technology high-tech product. It will be the effective zone carry on lining up for the customer,that is suitable each kind of window service industry. At present already widely applied in professions and such as bank, hospital. The use calls a number machine the system. One hand may eliminate the guest head of household time “stands in line” is laborious, is right “stands the wrong team”, “joins a production team” the complaint. Improves the grade of service and the enterprise image comprehensively. The other hand may rest on the statistical data adjustment traffic distribution, the excavation potential, the possible arrangement window service. It will reduce peoples’ waiting time and raise the working efficiency.
Key Words : number maching，queue, customer.
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武汉理工学《数字电子技术》课程设计说明书
一 Multisim软件介绍
Multisim是美国国家仪器（NI）有限公司推出的以Windows为基础的仿真工具，适用于板级的模拟/数字电路板的设计工作。它包含了电路原理图的图形输入、电路硬件描述语言输入方式，具有丰富的仿真分析能力。
1.1 EDA技术概述
EDA就是“Electronic Design Automation”的缩写技术已经在电子设计领域得到广泛应用。发达国家目前已经基本上不存在电子产品的手工设计。一台电子产品的设计过程，从概念的确立，到包括电路原理、PCB版图、单片机程序、机内结构、FPGA的构建及仿真、外观界面、热稳定分析、电磁兼容分析在内的物理级设计，再到PCB钻孔图、自动贴片、焊膏漏印、元器件清单、总装配图等生产所需资料等等全部在计算机上完成。EDA技术借助计算机存储量大、运行速度快的特点，可对设计方案进行人工难以完成的模拟评估、设计检验、设计优化和数据处理等工作。EDA已经成为集成电路、印制电路板、电子整机系统设计的主要技术手段。美国NI公司（美国国家仪器公司）的Multisim 9软件就是这方面很好的一个工具。而且Multisim 9计算机仿真与虚拟仪器技术（LABVIEW 8）（也是美国NI公司的）可以很好的解决理论教学与实际动手实验相脱节的这一老大难问题。学员可以很好地、很方便地把刚刚学到的理论知识用计算机仿真真实的再现出来。并且可以用虚拟仪器技术创造出真正属于自己的仪表。极大地提高了学员的学习热情和积极性。真正的做到了变被动学习为主动学习。这些在教学活动中已经得到了很好的体现。还有很重要的一点就是：计算机仿真与虚拟仪器对教员的教学也是一个很好的提高和促进。Multisim是Interactive Image Technologies (Electronics Workbench)公司推出的以Windows为基础的仿真工具，适用于板级的模拟/数字电路板的设计工作。它包含了电路原理图的图形输入、电路硬件描述语言输入方式，具有丰富的仿真分析能力。
1.2 Multisim特点
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武汉理工学《数字电子技术》课程设计说明书
●通过直观的电路图捕捉环境, 轻松设计电路 ●通过交互式SPICE仿真, 迅速了解电路行为 ●借助高级电路分析, 理解基本设计特征
●通过一个工具链, 无缝地集成电路设计和虚拟测试 ●通过改进、整合设计流程, 减少建模错误并缩短上市时间
NI Multisim软件结合了直观的捕捉和功能强大的仿真，能够快速、轻松、高效地对电路进行设计和验证。凭借NI Multisim，您可以立即创建具有完整组件库的电路图，并利用工业标准SPICE模拟器模仿电路行为。借助专业的高级SPICE分析和虚拟仪器，您能在设计流程中提早对电路设计进行的迅速验证，从而缩短建模循环。与NI LabVIEW和SignalExpress软件的集成，完善了具有强大技术的设计流程，从而能够比较具有模拟数据的实现建模测量
1.3 Multisim 分析方法
Multisim10为仿真电路提供了两种分析方法，即利用虚拟仪表观测电路的某项参数和利用Multisim10 提供的十几种分析工具，进行分析。常用的分析工具有：直流工作点分析、交流分析、 瞬态分析、傅立叶分析、失真分析、噪声分析和直流扫描分析。利用这些分析工具，可以了解电路的基本状况、测量和分析电路的各种响应，且比用实际仪器测量的分析精度高、测量范围宽。下面将详细介绍常用基本分析方法的作用、分析过程的建立、分析对话框的使用以及测试结果的分析等内容。
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