Lead: In daily life and work, the security of houses and departments, the preservation of documents and files, financial statements and some personal data of units are mostly solved by locking. Let me introduce you to the design paper of electronic password lock, and welcome you to read it for reference!

Design of electronic password lock: 1. Background and significance of the subject.

Lock is a security measure, a device that can only be opened with a key, which was invented by human beings to protect their private property. With the improvement of people's living standards and the strengthening of safety awareness, the requirements for locks are getting higher and higher, which should be safe, reliable and convenient to use. This makes the traditional lock anti-theft effect can not meet the anti-theft needs of modern society, and it is inconvenient to carry the key with you. Therefore, in recent years, with the continuous development of science and technology, a new type of electronic password lock came into being. The electronic code lock uses electronic circuit to control the mechanical part, so that the two parts are closely combined, which avoids the problem of abnormal unlocking function caused by the damage of the mechanical part. Moreover, there is an alarm sound when the password is input incorrectly, which greatly increases the anti-theft function of the electronic password lock. At the same time, because the electronic password lock does not need to carry the key, it makes up for the defect that the key is easy to be lost and forged, which is convenient for the use of the lock. Due to the simple structure of traditional locks, incidents of being pried are common, while electronic password locks are favored by users because of their high confidentiality, good flexibility and high safety factor.

Second, the research status at home and abroad

There are many kinds of electronic password locks, such as digital locks, fingerprint locks, magnetic card locks, ic card locks, biological locks and so on. , but the key electronic password lock is more practical. After 1980s, with the appearance of ASIC for electronic lock, the volume of electronic lock has been reduced, the reliability has been improved and the cost has been higher. It is suitable for occasions with high safety requirements and needs power supply to provide energy. The use is still limited to a certain range, so it is difficult to popularize, so there has been no obvious progress in its research.

At present, in western developed countries, the technology of password lock is relatively advanced and the types are relatively complete. Electronic password lock has been widely used in access control system, and access control management is realized through various safer and more reliable technologies. In China, the overall level of password locks is still around the 1970s, and the cost of electronic password locks is still very high. Push-button electronic lock is still the main product in the market. Push-button electronic locks and card-button electronic locks have been introduced to the international advanced level, and now there are several factories in China that produce and supply the market. However, the domestic self-developed electronic locks have not yet formed a market structure and are not widely used. Many domestic enterprises have also introduced the world's advanced technology, and their development prospects are very impressive. I hope that through unremitting efforts, electronic password locks can also be widely used in China.

Third, the main content of the thesis design.

1. Analysis and Scheme Selection of Electronic Code Lock;

2. Design a typical electronic password lock, and analyze its circuit structure and control program;

3. Select appropriate electrical components;

4. Write the control program;

5. Input the program into the PC, and carry out simulation operation after modification;

Fourth, the design scheme

By consulting literature and technical data, the structure, working principle and technical requirements of electronic code lock are analyzed. The electronic password lock system is composed of single chip microcomputer as the main control chip, combined with peripheral circuits and software programs, which can realize:

1. Unlock the prompt on the premise of entering the password correctly;

2. If the password is entered incorrectly, the buzzer will give an alarm;

3. You can change the password according to the needs of users.

Verb (abbreviation for verb) work schedule

20 1 1.2.22—20 1 1.3.8

20 1 1.3.9—20 1 1.3. 19

20 1 1.3.2 1—20 1 1.4.9

20 1 1.4. 10—20 1 1.4.30

20 1 1.5. 1—20 1 1.5. 10

2011.5.1-201.5.20 Determine the graduation design topic and submit the opening report; Consult relevant papers, investigate and collect relevant information; Design, review and determine the scheme, submit the interim report writing control scheme, sort out and write papers, improve the papers and submit them.

The main references of intransitive verbs

[1] Shi Wenxuan, Wei Song. Design of intelligent password lock based on MCS-5 1 [M]. Journal of Wuhan Institute of Technology, 2004, (01);

Joe, Liu. A new programmable password lock [J]. Journal of Dalian Institute of Light Industry, 2002, (01);

[3] Ye Qiming. A new type of security password lock made by single chip microcomputer [J]. Home Electronics, 2005, (10);

[4] Li Mingxi. Design of New Electronic Code Lock [J]. Development and Innovation of Electromechanical Products, 2004, (03);

Dong. A New Type of Secure Single Chip Microcomputer Code Lock [J]. Electronic Technology, 2004, (03);

[6] Yang Maotao. Implementation of an electronic password lock [J]. Fujian Computer, 2004, (08);

Qu Rong Gui. Practical electronic password lock [J]. Household appliances, 2000, (07);

Wang Qian. Encyclopedia of Practical Electronic Circuits [M], Electronic Industry Press, 200 1, P101;

[9] He Limin. Selected Applications of Single Chip Microcomputer [M], Beijing: Beijing Aviation University Press,1998;

[ 10] ATmega。 ATmega8L-8AC，2006，(0 1)；

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