智力抢答器系统的设计2017.docVIP

本科毕业设计 题　　目　 智力抢答器系统设计　 学生姓名　 任 平　　　 专业名称　 电子信息工程　　　 指导教师　 张　 小 娟　　　 2007 年 6月 5日目 录 一、设计正文 中文摘要………………………………………………………………Ⅱ 英文摘要………………………………………………………………Ⅲ 正文目录………………………………………………………………Ⅳ 二、附录 1. 设计任务书 2. 设计中期检查报告 3. 指导教师指导记录表 4. 设计结题报告 5. 成绩评定及答辩评议 6. 设计答辩过程记录 智力抢答器系统设计 摘要: 智力抢答器这一产品是各种竞赛活动中必不可少的设备，在国内外都是比较有用的，而且它的发展很迅速。从一开始的仅具有抢答锁定功能的一个电路，到现在的具有倒计时、定时、自动（或手动）复位、报警（即声响提示，有的以音乐方式来体现）、屏幕显示、按键发光等多种功能的技术合并，这就可以说明其多种功用及发展的迅速。本设计介绍了一种用74系列常用集成电路设计的数码显示八路智力抢答器的设计方案、设计思路、电路组成及功能。该抢答器除具有基本的抢答功能外，还具有定时、计时和报警功能。主持人通过时间预设开关预设供抢答的时间，系统将完成自动倒计时。若在规定的时间内有人抢答，则计时将自动停止；若在规定的时间内无人抢答，则系统中的蜂鸣器将发出声响，提示主持人本轮抢答无效，实现报警功能。本设计所采取的设计方案简便直观，仅用几个TTL门即可实现主持人对整个电路的控制，用集成单稳态触发器控制报警电路，用现有芯片取代自己设计，既实现了预期功能，又减少了布线，使得错误产生的概率大大降低。电路组成选用74系列芯片，经济实用，稳定可靠，适用于大规模生产。 关键词: 智力抢答器；八路；设计；定时；控制The design of intelligence answering racer system Abstract: Intelligence answering racer is the product that is essential equipment in various competitions, which is at home and abroad are more useful, moreover, its development is also fast. From the beginning of having only responder and lock function of a circuit, and now with the countdown, timing, automatically (or manually) reset, alarm (audible alert signal, in some ways embodies with music), the LED display, luminescent keys and other technical functions merger, which illustrates its various function and rapid development. In the design, the electric circuit and designing thought of an intelligence answering racer based on the common-used series of 74 IC with 8-wire is introduced, and its function is also described. The answering race’s function includes timing, counting, and alarming, besides the basic function of an answering racer. The host sets the provided time for the answering race through the time-setting switch, after this the system will count down the time automatically. If anybody answer the question on time, the counting of time will stop; If nobody answer the question on time, the alarm will give out some sound, helping the host kn