单片机论文基于51单片机智能竞赛抢答器设计与实现.docVIP

基于51单片机智能竞赛抢答器设计与实现s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：STC89C51 LED数码管 抢答器 计时 ABSTRACT As a tool, the first answer device has been widely used in all kinds of intelligence and knowledge contests occasions. However, it is not used so frequently due to its production complexity, lacking of reliability and reducing interest. And this design is based on the principle of eight-way first answer, with the using of single-chip timer / counter timing and number of the principles in mind, the software and hardware combination, makes the system time correctly, while the digital control to display time correctly. Switch the keyboard to do with output, speaker prompted occurred. At the same time, the system can be realized: In the competitive answering game, only after the answer that will be valid, if at the beginning of pre-answer that will be invalid; Competitive answer to the question and the end of the question can be set in 1-99s; it can show whos effective and whose answer’s invalid, the correct button will prompt after the music; count down to the competitive and finished time, when it’s full time the system will be automatic reset and the master will also be forced reset ;keys locked in the effective state, while the key is invalid illegal. Keywords: STC89C51 LED digital tubes the first answer device Time 引言 在电视和学校中我们能经常看到一些智力抢答的节目，抢答不仅考验选手的反应速度同时也要求选手选手具备一定的知识面和勇气。传统的抢答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，只有靠电子产品的高准确性来保证抢答的公平性。随着电子技术的发展，现在的抢答器功能越来越强，可靠性和准确性也越来越高。 对于目前抢答器的功能描述，如涵盖抢答器、抢答限时、选手答题计时及犯规组号抢答器具有抢答自锁，灯光指示、暂停复位、电子音乐报声、自动定时等功能，还有工作模式的切换和时间设定，对于这些，随着科学技术的发展，肯定还要得到进一步的改进。一般都要趋向于智能化。 系统分析与总体设计 2.1功能需求 基本要求： 给主持人设置一个开关，用来控制系统的清零（编号显示数码管灭灯）和抢答器的开始。 抢答器具有数据锁存和显示的功能。抢答开始后，若有选手按动抢答器按钮，编号立即锁存，并在LED数码上显示选手的编号，同时扬声器给出音响提示。此外，要封锁输入电路，禁止其他选手抢答 图1 系统主要功能模块 本系统采用模块化设计的八路抢答器，在抢答比赛中广泛应用，各组分别有一个抢答按钮。一共有8个按键输入和8个LED灯，分别对应8路选手。 硬件设计 3.1硬件介绍 本设计分为硬件设计和软件设计，随着集成电路技术的飞速发展，硬件设计的工作量在整个项目中的所占的比重逐