【正文】 唐 山 學(xué) 院 畢 業(yè) 設(shè) 計(jì) 設(shè)計(jì)題目： 基于單片機(jī)的 紅外遙控電子密碼鎖設(shè)計(jì)與實(shí)現(xiàn) 系 別 2021 年 6 月 10 日 基于單片機(jī)的紅外遙控電子密碼鎖設(shè)計(jì)與實(shí)現(xiàn) 摘 要 隨著社會的進(jìn)步以及人們生活水平的提高，人們對于貴重物品的安全看的越來越重要。鎖是人們用來保護(hù)貴重物品的一種普遍工具。目前大部分的鎖采用的都是機(jī)械式的，其最大的缺點(diǎn)是利用簡單工具就能很容易地把鎖打開。出于安全、方便等方面的需要，許多電子密碼鎖已經(jīng)相 繼問世。電子密碼鎖由于其保密性高，使用靈活性好，安全系數(shù)高，受到越來越多的關(guān)注。 紅外遙控電子密碼鎖是一種以紅外光作為密碼載體，在單片機(jī)上實(shí)現(xiàn)了遙控開關(guān)。該鎖具有使用方便、操作簡單、價(jià)格低廉等特點(diǎn)， 給人們的生活帶來了極大方便。 適用于那些人不宜接近的特殊場合，比如高輻射區(qū)、高傳染區(qū)等。 本設(shè)計(jì)以單片機(jī) AT89S52作為密碼鎖檢測和控制核心，分為主機(jī)和從機(jī)。根據(jù)51單片機(jī)之間的串行通信原理，利用紅外來傳輸，大大增加了密碼的保密性。采用數(shù)字信號編碼和二次調(diào)制方式，不僅可以實(shí)現(xiàn)多路信息的控制，增加遙控功能，提高信號 傳輸?shù)目垢蓴_性，而且功率消耗低；紅外線不會向室外泄露，不會產(chǎn)生信號串?dāng)_；反應(yīng)速度快、傳輸效率高、工作穩(wěn)定可靠等。所以紅外線遙控是目前使用最廣泛的一種通信和遙控手段。 軟件設(shè)計(jì)采用自上而下的模塊化設(shè)計(jì)思想，以使系統(tǒng)朝著分布式、小型化方向發(fā)展，增強(qiáng)系統(tǒng)的可擴(kuò)展性和運(yùn)行的穩(wěn)定性。測試結(jié)果表明，本系統(tǒng)各項(xiàng)功能已達(dá)到本設(shè)計(jì)的所有要求。 關(guān)鍵詞 紅外線 遙控 電子密碼鎖 單片機(jī) Based on SCM Infrared Remote Control Electronics Combination Lock Design and Implementation Abstract Along with the progress of the society and the improvement of people39。s living standards, security of valuable is more and more important. Lock is a kind of universal tool which people used to protect the valuables. At the moment, most of the locks are mechanical. The biggest drawback is that the lock can be easily opened by using simple tools. Thinking about the safety and convenient, many electronic bination lock appeared. Electronic bination lock receives more and more attention because of its high confidentiality, flexibility and high safety coefficient. Infrared remote control electronic bination lock is a carrier with infrared as the password, in the single chip puter to realize the remote control switch. It has characteristics such as easy to use, simple operation, low prices and brings great convenience for the life of people. Applicable to these special occasions which people should not close to, such as high radiation, high infected area etc. This design uses AT89S52 devices as a bination lock detection and control core, divided into host and slave machine. According to the serial munication principle between 51 SCM, the password is transported by the infrared which increased its privacy significantly. Adopting digital signal encoding and second modulation mode can not only control multichannel information, increase remote control function and improve the signal transmission of immunity but also low power consumption。 infrared will not leak to the outside, no crosstalk, fast response, high transmission efficiency, stable and reliable etc. Therefore infrared remote control is the most widely used means of a munication and remote control. Software design using topdown modular design to enable the system toward a distributed, small direction, enhance system scalability and operational stability. The results show that the various functions of the system have reached all the requirements of the design. Key words: Infrared。 Remote control。 Electronic locks。 Singlechip microputer 目 錄 1 引言 ................................................................................................................................ 1 2 系統(tǒng)簡介 ........................................................................................................................ 3 設(shè)計(jì)方案簡介 ........................................................................................................ 3 芯片的選擇 ............................................................................................................ 3 單片機(jī)的選擇 ........................................................................................... 3 顯示器的選擇 ........................................................................................... 3 鍵盤的選擇 ................................................................................................ 4 其他器件的選擇 ....................................................................................... 4 3 器件介紹 ........................................................................................................................ 5 單片機(jī)簡介 .............................................................................................................. 5 單片機(jī)的發(fā)展歷史 .................................................................................................. 5 AT89S52 單片機(jī) ....................................................................................................... 6 紅外遙控的發(fā)射和接收原理簡介 .......................................................................... 8 紅外線的介紹 .............................................................................................. 8 紅外通信基本原理 ....................................................................................... 8 紅外遙控發(fā)射系統(tǒng) ...................................................................................... 9 LCD1602 的介 紹 .................................................................................................... 12 AT24C02 的介紹 .................................................................................................... 15 4 硬件設(shè)計(jì) ...................................................................................................................... 16 總體方案設(shè)計(jì) ........................................................................................................ 16 電源部分的設(shè)計(jì) .................................................................................................... 17 4. 3 復(fù)位電路的設(shè)計(jì) ................................................................................................... 19 鍵盤電路的設(shè)計(jì) .................................................................................................... 19 顯示電路的設(shè)計(jì) .................................................................................................... 20 密碼保存電路設(shè)計(jì) ................................................................................................ 21 蜂鳴器報(bào)警電路 ......................................