毕业设计（论文）-基于单片机的智能抢答器设计.doc

郑州科技学院
专科毕业设计(论文)

题目___八路智能抢答器___
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智能数字抢答器
摘要
随着科学技术的不断发展,促使人们学科学、学技术、学知识的手段多种多样。抢答器作为一种工具,已广泛应用于各种智力和知识竞赛场合。但抢答器的使用频率较低,且有的要么制作复杂,要么可靠性低,减少兴致。做为一个单位若专购一台抢答器虽然在经济上可以承受,但每年使用的次数极少,往往因长期存放使(电子器件的)抢答器损坏,再购置的麻烦和及时性就会影响活动的开展,因此设计了本抢答器。
本设计是以六路抢答为基本理念。考虑到依需设定限时回答的功能,利用AT89C51单片机及外围接口实现的抢答系统,利用单片机的定时器/计数器定时和记数的原理,将软、硬件有机地结合起来,使得系统能够正确地进行计时,同时使数码管能够正确地显示时间。用开关做键盘输出,扬声器发生提示。同时系统能够实现:在抢答中,只有开始后抢答才有效,如果在开始抢答前抢答为无效;抢答限定时间和回答问题的时间可在1-99s设定;可以显示是哪位选手有效抢答和无效抢答,正确按键后有音乐提示;抢答时间和回答问题时间倒记时显示,满时后系统计时自动复位及主控强制复位;按键锁定,在有效状态下,按键无效非法。关键词: AT89S51/LED数码管/声光提示/计时
Responder Smart Design
ABSTRACT

With the continuous development of science and technology, encourage people to study science and technical studies and varied means of as a tool has been widely used in various occasions intelligence and frequency of use, but low, and some or plex, or low reliability and reduce as a unit if purchased a Responder While economically affordable, but very few number of times each year, often due to long-term storage (electronic devices) Responder damage, then the trouble and time of the acquisition will affect theactivities carried out, so the design of this Responder.
The design is based on six-way Responder as the basic into account the need to set the time limit to answer according to the function, using AT89C51 microcontroller and external interface of the answer in the system, using the microcontroller timer / counter timing and counting in principle, the hardware and software anically, making the system can correctlyto carry out time, while making the digital display the time keyboard to do with the switch output, the speaker happened the same time the system can be achieved: In the Responder, the Responder is valid only after the start, if the answer in before the answer in the beginning to be invalid; answer in a limited time and the time to