基于单片机的新型抢答器设计.doc

哈尔滨工业大学工学硕士学位论文 哈尔滨理工大学学士学位论文 - PAGE II - -  PAGE II - 基于单片机的新型抢答器设计 摘要 随着我国经济和文化事业的发展，在很多竞争场合都要求有快速公正的竞争裁决，例如证券、股票交易及各种智力竞赛等。智力竞赛是一种生动活泼的教育方式，而抢答就是智力竞赛中非常常见的一种答题方式。抢答能引起参赛者和观众的极大兴趣，并且能在极短的时间内，使人们迅速增加一些科学知识和生活常识。但是，在这类比赛中，对于谁先谁后抢答，在何时抢答，如何计算答题时间等等问题，若是仅凭主持人的主观判断，就很容易出现误判。一般的抢答器由很多门电路组成，线路复杂，可靠性低，特别是抢答路数增多时，实现起来更加困难。 本文介绍一种利用AT89C51单片机及其外围接口电路实现的抢答系统，具有很强的实用性。本设计功能齐全，可通过LED数码管显示出获得抢答权的编组号，抢答器要有自动定时功能，并且一次抢答时间由主持人任意设定。当主持人启动“开始”键后，定时器自动减计时，并在显示器上显示。同时扬声器上发出短暂声响，并能显示各组选手的得分情况；实现进行倒计时、发光提示、违例判别和不同分值的加减、不同分值的赋初值等功能。 主持人的控制台上，设有开始键、加分键、初值加分键、3分键、5分键，方便主持人在整个抢答过程中进行控制，保证了整个抢答过程在公正、公平的环境下进行。 关键词: 单片机；AT89C51；LED数码管；竞赛抢答器 A Research on a new type of answering device based on single-chip Abstract It demands to have fast and just competition to award in a lot of competition occasions with the development of economic and cultural undertakings of our country, such as securities, stock exchange and various kinds of intelligent tests, etc.. Generally vying for the answering device is made up of much pieces of circuit, the circuit is complicated, and the dependability is low, especially while the number of vying for answering is increasing, it is more difficult to realize. This text introduces a system of answering which is made use of AT89C51 and peripheral interface, having very strong practicability. Its function is powerful .It can show the NO.of group which has the right to vie,also can show the goal of every group.It can carry on count down, and give out light to get attention. It can show fault differentiate and different add and subtractg goal and show diferent initial value of composing group. A start key, a add goal key, a early add value key, a 3-cent key, a 5-cent key, and a contestant serial number card are established on the stage of host, in order to control the whole process of rob answer and mahe the rob answer process fair and just.In this design the answers were sent PC for showing, letting contestants known the rivals goal and showing justice.