【正文】 high anti interference, and less disoperation, low power consumption, including other advantages, such as fast response infrared transmission, high transmission efficiency, stable and reliable operation . Based on these advantages, this lock can be widely used in civil doors, warehouse doors. The system is an infrared remote controlled electronic lock with functions of a local and remote unlocking, using microputer AT89C51 [2] as a core ponent of this design, according the infrared remote control theory and MCU serial transmitter and receiver functions. The block diagram of the system was shown in Figure 1. The basic functions design of the remote lock is divided into five parts such as choosing a password, password show, unlocking of the machine key, password error alarm and remote unlocking. 2 The Design of Hardware Circuit The Design of infrared remote control transmitter IR transmit / receive control circuits are achieved by the AT89C51 microcontroller with simple circuit, selectable output control method and very practical [5]. The specific work process is as follows: 28 Launch: First, sent back the data from the serial transmit port to the port for internal modem, sent out from the port, and then fired out through the infrared emitting diodes, firing distance is about 10m. Receipt: The infrared receiver head matched with the launch is used. , sent out the data launched to the serial port , and then the system will confirm whether the send data are consistent with the receive data, yes will unlock, no will give up. The design of Infrared remote control transmitter [3] is shown in Figure 2. The Design of machine key unlocking circuit The machine key unlocking circuit is shown in Figure 3, AT89C51 is the core of this circuit, P0 mouth and , , are connected with the keyboard of this machine externally. port is connected with the infrared remote receiver head externally, port with alarm signal amplifier used to enlarge the alarm signal to drive speakers, port with unlocking electromagic drive circuit, with password selection keys, there are two sets of passwords in EPROM memory, P2 with digital tube, used to show whether the key is pressed, is connected with drive control circuitry to control the power supply of LM386, meaning that only the alarm, LM386 can supply power, power outages usually, This greatly reduces the current consumption. 29 This circuit is consist of remote control transmitters, receivers, keyboards, monitors etc., this machine uses 10 keys as a password input keys, using the remote control lock at the same time [4].Features are following: (1) when no remote control signal is received, enter a password though the keyboard, if the five valid password entered correctly, press to confirm, will output high to enable electromagic locks move to plete the unlock .At the same time, the circuit enters extended state, 5 seconds later, the circuit will automatically be restored to the original state of the latch. (2) When the five valid passwords are entered correctly, but did not press the key to confirm, then the circuit will automatically give up and return to the initial locking status. (3)The 5 valid password must be entered in according with the order, error order or the wrong password would not fit the lock if was not confirmed, and fivesecond alarm signal 30 will be issued to remind the user. (4) If 3 consecutive wrong password, there will be a long time alarm, then only reset button can return the system to the original state. (5)When enter the password, the circuit will start automatic timing if the first password was entered correctly, the intervals of between two password number when 。謝謝！ 26 附 錄 附件 1：英文原文及中文翻譯 英文原文 The Design of Infrared Remote Control Electronic Code Lock Tianxing Meng, Lanlan Yu School of Electric and Electronic Engineering Shandong University of Technology School of Electric and Electronic Engineering, Shandong University of Technology, 255049 Zibo, China Abstract: The lock used a microcontroller as the core of the control. It was consist of two major ponents: the infrared remote control launching system and the infrared remote control receiver system, including a microputer control and display, many other modules such as unlock and alarm, and so on. The design of password lock includes hardware system design and software system design. The key technical indicators are: the lock opening, password storage, the effective protection of user39。同時(shí)，感謝通信工程學(xué)院的所有老師在四年里對(duì)我的悉心教導(dǎo)，是你們的付出，讓我自己有了更高的提升。非常感謝我的大學(xué)，它不僅教會(huì)我更多的知識(shí)，同時(shí)也教會(huì)我做人的道理，讓我從一個(gè)稚嫩的高中生變成一個(gè)成熟的青年。 經(jīng)過(guò)這次的畢業(yè)設(shè)計(jì)，我在處理方案 上得到了許多啟發(fā)， 極大的提高了自己的動(dòng)手能力 。 24 參考 文獻(xiàn) [1] 張毅剛 ,彭喜元 .單片機(jī)原理與應(yīng)用設(shè)計(jì) [M].北京 :電子工業(yè)出版社 ， 2020. [2] 童詩(shī)白 ,華成英，模擬電子技術(shù)基礎(chǔ) [M].北京 :高等教育出版社， 2020. [3] 閻石主著 .數(shù)字電子技術(shù)基礎(chǔ) [M].北京 :高等教育出版社， 2020. [4] 張?jiān)?,周明輝 ,周海林 ,等 .基于 AT89S51 的多功能電子密碼鎖設(shè)計(jì) [J].電子設(shè)計(jì)工程，2020, 18(6):2325. [5] 陳丹萍 .基于 AT89S51 單片機(jī)的電子密碼鎖設(shè)計(jì) [J].大眾科技， 2020（ 6） :4546. [6] 田曉翠，李林英 .基于單片機(jī) AT89C51 電子密碼鎖的設(shè)計(jì) [J].無(wú)線互聯(lián)科技， 2020（ 10） ： 94. [7] 余錫存 .單片機(jī)原理及接口技術(shù) [M].西安 :西安電子科技大學(xué)出版社 ,2020. [8] 李全利 .單片機(jī)原理及接口技術(shù) [M].北京 :北京航空航天大學(xué)出版社 ,2020. [9] 薛均義 ,張彥斌 .MCS51 系列單片微型計(jì)算機(jī)及其應(yīng)用 [M].西安 :西安交通大學(xué)出版社 , 2020. 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