八路抢答器（论文）

密级：

NANCHANG UNIVERSITY

实 训 论 文（设 计）

THESIS OF BACHELOR

（2011—2012年）

中文题目:

八路抢答器的设计与制作

英文题目：

学 院： 系 别： 专业班级： 学生姓名： 学 号： 指导教师：

二 ○ 一 一 年 十 二 月

南昌大学共青学院 信息工程系 应用电子技术 xxx xxx 14 23

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摘要

当今的社会竞争日益激烈，选拔人才，评选优胜，知识竞赛之类的活动愈加频繁，那么也就必然离不开抢答器。而现在的抢答器有着数字化，智能化的方向发展，这就必然提高了抢答器的成本。鉴于现在小规模的知识竞赛越来越多，操作简单，经济实用的小型抢答器必将大有市场。因此，我们制作了这款简易八路抢答器屏弃了成本高，体积大，而且操作复杂。我们采用了数字显示器直接指示，自动锁存显示结果，并具有复位的设计思想，本抢答器通过十分巧妙的设计仅用两块数字芯片便实现了数显抢答的功能，与其他抢答器电路相比较有分辨时间极短、结构简单、成本低、制作方便等优点，并且还有按键报警功能。

抢答器在抢答过程中，为了知道哪一组或哪一位选手先答题，必须要设计一个系统来完成这个任务。如果在抢答中，靠视觉很难判断哪组先答题。利用数字芯片系统来设计抢答器，使以上问题得以解决，即使两组的抢答时间相差几微秒，也可分辨出那组优先答题。数字抢答器由主体电路与扩展电路组成。优先编码电路、锁存器、译码电路将参赛队的输入信号在显示器上输出；用控制电路和主持人开关启动报警电路，以上两部分组成主体电路。经过布线、焊接、调试等工作后数字抢答器成形。

关键词： CD4511、 抢答、 数显

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Abstract

The modern society increasingly fierce competition, the selection of talent, selection, knowledge contest winners activities such increasingly frequent, so must leave vies to implement. But now the responder has a digital device, the intelligent direction, this will necessarily improves vies to implement the cost. Now that the small-scale knowledge competition more and more, the operation is simple, economic and practical small vies to implement will certainly market. Therefore, we made this kind of simple eight line vies to implement reject the high cost, big volume and complex operation. We adopted digital display direct instructions, automatic latch showed results, and have reset design ideas, this vies to implement through very clever design with only two digital chip then realized digtal vies to function, and other scare-answering decoder circuit compared have tell time is very short, simple structure, low cost, convenient, and production and buttons alarm function.

Contest in the responder process, in order to know which group or which one player first answer, must design a system to finish the task. If in the contest, it is difficult to judge by visual which group first answer. Using digital chip system to implement, make design contest above problems were solved, even if the two groups of vies time difference microseconds, also can distinguish the group of priority answer. Digital vies to implement by corpus circuit and expansion circuit composed. Priority coding circuit, latches, decoder circuit will be the team's input signal on the display output, With the control circuit and the host switches on the alarming circuit, the above two parts subject circuit. After wiring, welding, commissioning work digital vies to implement forming.

Keywords: CD4511, vies, digital

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目录

摘要 ………………………………………………………………………………………2 Abstract …………………………………………………………………………………3 目录 ………………………………………………………………………………………4 引言 ………………………………………………………………………………………5 1 实训内容 ……………………………………………………………………………6 1.1 实训目的 ……………………………………………………………………………6 1.2思路总体设计 ………………………………………………………………………

1.2.1 设计任务与要求 ………………………………………………………………………6 1.2.2 设计原理与参考电路 …………………………………………………………………6 1.2.2.1设计方案论证与比较 ………………………………………………………………6 1.2.2.2部分电路工作原理 …………………………………………………………………7 1.2.2.2.1开关阵列电路 ……………………………………………………………………7 1.2.2.2.2触发锁存电路 ……………………………………………………………………7 1.2.2.2.3数码显示 …………………………………………………………………………7 1.2.2.3总体电路设计 …………………………………………………………………………8 1.2.2.3.1抢答器电路 ………………………………………………………………………8 1.2.2.3.2倒计时电路 ……………………………………………………………………10 1.3 实训器材清单 ……………………………………………………………………10

2 实训方法

…………………………………………………………………………11

2.1电路板制作过程 ……………………………………………………………………11 2.2电路组装和调试 ……………………………………………………………………12

3 结论 …………………………………………………………………………………12 谢辞 ………………………………………………………………………………………13 参考文献…………………………………………………………………………………14 附录 ………………………………………………………………………………………15

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