基于单片机技术八路抢答器设计及PCB设计.docVIP

基于单片机技术的八路抢答器设计及PCB设计 摘要 当今社会竞争日益激烈，选拔人才，评选优胜，知识竞赛之类的活动愈加频繁，比赛中为了准确、公正、直观的判断出第一抢答者，这就需要一种抢答设备作为裁判员，于是抢答器应运而生。 抢答器是一种应用非常广泛的设备，在各种竞赛、抢答场合中，它能迅速、客观地分辨出最先获得发言权的选手，无论是军队还是电视节目中，都可能会举办各种各样的智力竞赛，都会用到抢答器。如果要是让抢答者用举手等方法，主持人很容易误判，会造成抢答的不公平，比赛中为了准确、公正、直观地判断出第一抢答者，所设计的抢答器通常由数码显示、灯光、音响等多种手段指示出第一抢答者。为了使这种不公平不发生，只有靠电子产品的高准确性来保障抢答的公平性。 本设计是以八路抢答为基本理念。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/计数器定时和计数的原理，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，如果在开始抢答钱抢答为无效；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的时间倒计时显示，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。 关键字：抢答器；单片机；AT89C51；模块；按键 ABSTRACT Todays increasingly fierce social competition, talent selection, selection of winning, knowledge contests activities more frequent, such as game in order to accurate, fair and straightforward to determine first vies to answer first, it will have a vies to answer first device as a referee, and vies to answer first device application. Responder is a kind of application is very wide range of equipment, in the various competitions, vies to answer first, it can promptly and objectively identify the first won the voice, whether the army or TV shows, may hold a variety of quiz, can use the buzzer. If let vies to answer first the use methods of hand, the host is easy to misjudge, unfair will cause the vies to answer first, match in order to accurate, fair and straightforward to determine first vies to answer first, vies to answer first device design by usually by digital display, lighting, sound and so on many kinds of means to indicate the first vies to answer first. In order to make this kind of unfair is not born, only rely on electronic products of high accuracy to guarantee fairness of vies to answer first. this design is based on no vies to answer first the basic concept. Given in accordance with the need to set the function of the prompt answer, using AT89C51 single-chip microcomputer and peripheral interface imp