【正文】 分為無(wú)線電腦搶答器和有線電腦搶答器。 目前 電子搶答器的中心構(gòu)造一般都是 由數(shù)字電子集成 電路組成，其搭配的配件不同又分為，非語(yǔ)音非記分搶答器和語(yǔ)音記分搶答器。了解國(guó)內(nèi)外搶答器生產(chǎn)核心技術(shù)的研發(fā)動(dòng)向、工藝設(shè)備、技術(shù)應(yīng)用及趨勢(shì)對(duì)于企業(yè)提升產(chǎn)品技術(shù)規(guī)格，提高市場(chǎng)競(jìng)爭(zhēng)力十分關(guān)鍵。 早期的搶答器只由幾個(gè)三極管、可控硅、發(fā)光管等組成，能通過(guò)發(fā)光管的指示辯認(rèn)出選手號(hào)碼。 button 第 1 頁(yè) 共 60 頁(yè) 1 緒論 當(dāng)今的社會(huì)競(jìng)爭(zhēng)日益激烈，選拔人才，評(píng)選優(yōu)勝，知識(shí)競(jìng)賽之類的活動(dòng)愈加頻繁，比賽中為了準(zhǔn)確、公正、直觀地判斷出第一搶答者 ，這就要有一種 搶答設(shè)備 作為裁判員，于是搶答器應(yīng)用而生。s attention. Power supply module is raised to the system design and extensive application of the module, it is the main task of the 220 V ac voltage conversion for dc system ca n directly use of the stability of the dc + 5 V. This design limited the number of eight, vies to answer first vies to answer first process is as follows: when the host to press the start button vies to answer first, digital display shows vies to answer first time countdown, and in the last five second start alarm circuit hint, in vies to answer first time eight players in the process vies to answer first, after the success display module, vies to answer first demonstrated contestant number and answer the question time. To answer the question, can press the stop button host, a new round of vies to answer first began to end. If the host did not press the start button and contestant vies to answer first vies to answer first, it shall be regarded as the foul, display module shows FF and demonstrated contestant number, and alarm circuit hints. According to stop button host, a new round of vies to answer first began after. Display module in the initial display, exceed the prescribed vies to answer first time still no contest and the answer in excess of the prescribed time shows FFF. Vies to answer first time and answer problem of time can set, set a range of 199 s, original state vies to answer first time for 10 s and answer the question time for 30 s. Backstage host can vies to answer first time to adjust key, answer time to adjust key and time add 1 , minus 1 button modify vies to answer first time and player answer problem of time after time, change stop button certain that the new time to start the effective. In the design process, vies to answer first do first overall scheme, and then analyses the argument for the working principle of the system, and based on this, the design of unit of the circuit principle diagram, further to the design of the system to plete the circuit. In the 第 V頁(yè) 共 Ⅴ 頁(yè) working principle of the system based on the study of the fully, and choose appropriate ponent model and parameter, garnish with protel drawing software draw circuit principle diagram, according to write software interface circuit program. Keyword: vies to answer first。 during the countdown, the host would like to stop the countdown,can press the stop button, the system will automatically enter the state. The system USES the software and hardware of the method of bining and design, including hardware design are borrowed from the singlechip microputer AT89C51 as the center control module, the modular design division, with six module, respectively is: the core control module, the power modules, clock and reset module, key input module, display module, alarm module. The software design is the mon assembly language programming. 第 IV頁(yè) 共 Ⅴ 頁(yè) Key input module in 14 key, divided into vies to answer first keys and control buttons. Vies to answer first key there were eight, respectively, for vies to answer first S8 S1players use vies to answer first。 vies to answer first instruments have lock to save and display? function. That39。 host can through the intelligence is set button vies to answer first each question time and answer the vies to answer first time。 在 搶答器設(shè)計(jì) 過(guò)程中，首先完成總體方案的論證制定，然后分析系統(tǒng)的工作原理，在此基礎(chǔ)上設(shè)計(jì)出各部分單元 電路原理圖，進(jìn)一步完成對(duì)系統(tǒng)電路的設(shè)計(jì)。主持人按 “ 停止按鍵 ” 后，新一輪搶答開(kāi)始。電源模塊是為了 增 強(qiáng)本系統(tǒng)應(yīng)用的廣泛性而設(shè)計(jì)的模塊，它的主要任務(wù)是將交流 220V 電壓轉(zhuǎn)換為系統(tǒng)中可以直接使用的 穩(wěn)定的 直流 +5V。搶答按鍵共有八個(gè)，分別為 S1―S8 ，供搶答選手進(jìn)行搶答使用；控制按鍵有六個(gè)，分別為 S9―S14 ， 其中 S9和 S10 分別為“搶答時(shí)間調(diào)整鍵”和“回答時(shí)間調(diào)整鍵”； S11 和 S12 分別為時(shí)間“加 1”和“減 1”按鍵； S13 和 S14 分別為“搶答開(kāi)始按鍵”和“停止按鍵”。即選手按下按鍵，鎖存相應(yīng)選手的參賽編號(hào)，并在 LED 數(shù)碼管上顯示，選手搶答實(shí)行優(yōu)先鎖存，其他按鍵者將不能響應(yīng)，以便公平地選擇第一個(gè)搶答者 ；參賽選手在設(shè)定的時(shí)間內(nèi)進(jìn)行搶答，搶答有效，顯示器上顯示選手的編號(hào)，同時(shí)進(jìn)入回答問(wèn)題的 時(shí)間 倒計(jì)時(shí) ； 倒計(jì)時(shí)期間，主持人想終止倒計(jì)時(shí)，可以按下 “ 停止 ” 鍵，系統(tǒng)會(huì)自動(dòng)進(jìn)入準(zhǔn)備狀態(tài) 。 為適應(yīng)多 選手搶答 活動(dòng)的需要而 設(shè)計(jì)一個(gè) 智能 搶答器 ， 這種搶答器具有電路簡(jiǎn)單 ， 元件普通 ， 易于購(gòu)買(mǎi)等優(yōu)點(diǎn) ， 很好地解決了制作者制作困難 和 難于購(gòu)買(mǎi)的問(wèn)題。 但目前所使用的搶答器有的電路較復(fù)雜 ， 不便于制作 ，而且 可靠性低 ， 實(shí)現(xiàn)起來(lái) 很 困難 ； 有的則用一些專用的集成 芯片， 而專用集成 芯片 的購(gòu)買(mǎi)又很困難 。具有清零和非 法搶答控制功能，設(shè)置一個(gè)系統(tǒng)清除和搶答控制開(kāi)關(guān)，并由主持人操控 ；當(dāng)主持人啟動(dòng) “ 開(kāi)始搶答按鍵 ” 后，定時(shí)器進(jìn)行減計(jì)時(shí)，搶答時(shí)間耗盡后禁止搶答 ； 倒計(jì)時(shí) 5 秒時(shí)，如果仍無(wú)人搶答，則系統(tǒng)每 1s 報(bào)警一次，用以提示參賽選手 ； 搶答器具有鎖存與顯示功能。 按鍵輸入模塊共有 14 個(gè)按鍵，分為搶答按鍵和控制按鍵。 報(bào)警模第 II 頁(yè) 共 Ⅴ 頁(yè) 塊在本系統(tǒng)中為附加模塊，它的主要用途就是起到提示 并引起人們的注意。如果在主持人沒(méi)有按下 “ 搶答開(kāi)始按鍵 ” 而選手就搶答，則視為犯規(guī)，顯示模塊顯示 “ FF” 并顯示選手號(hào)碼， 而且報(bào)警電路進(jìn)行提示。后臺(tái)主持人可以通過(guò) “ 搶答時(shí)間調(diào)整鍵 ” 、 “ 回答時(shí)間調(diào)整鍵 ” 和時(shí)間 “ 加 1” 、 “ 減 1”按鍵修改搶答時(shí)間和選手回答問(wèn)題的時(shí)間時(shí)間，改完后 “ 停止按鍵 ” 確定，新時(shí)間開(kāi)始有效。 Others use some special integrated chips, and the purchase of the special integrated chips and very difficult. In order to adapt to the needs of the many players vies to answer first activities and design a intelligent vies to answer first device, this vies to answer first instruments have circuit is simple, ponents, easy to buy ordinary etc, and solves the difficult and hard to buy makers make the problem. This system is AT89C51 microcontroller as the core and the design of the intelligent vies to answer first 8. According to the function, intelligent vies to answer first the vies to answer first the design requirements of the following: vies to answer first is also for 8 contestants or 8 teams game。 countdown 5 seconds, if still no contest, then system every 1 s? alarm once, to tip petitors。s Numbers, and at the same time into the answer problem of the time countdown。 S13 and S14 are vies to answer first start button and stop button. Display module the system USES four were LED digital display, anode tube a digital works to display the player to vies to answer first, number two used to display the countdown, a time of unused digital tube as the expansion of