毕业设计论文-电子报警密码锁.docVIP

Abstract In the daily life and the work, the means which the housing and departments safe guard, units document file, the financial report form as well as some individual material preservation many locks solves.If use tradition mechanical key unblanking, the people often must carry many the key, the use is not extremely convenient, after also the key loses the security namely to sell at a discount greatly.Unfolds unceasingly along with the science and technology, in peoples is more and more high to daily life safe insurance component request.In order to satisfy the people blockage the operation requirements, increases its security, replaces the key with the password the password lock to arise at the historic moment.The password locking device kto prevent going in has the security high, the cost low, the power loss low, easy to operate and so on the merits. This article introduced manufactures the design system using at89S51 monolithic integrated circuit which a simple password locks.In the article first introduced this design design mentality and the design proposal, it mainly divides into three big modules: Keyboard control module, nixietube demonstration module, password comparison module.Then has made the detailed introduction to the main chip.Finally narrated the system hardware part comprehensively, the software part.This system uses the C language to carry on the software design, and enclosed detailed programming diagram, flow chart, concrete procedure.This design may realize its function, causes the system to have the practical application, the user friendly, the intellectualization. Key word：Monolithic integrated circuit;；Password lock；STC89C52 1. 绪论 1.1 课题背景 随着社会物质财富的日益增长，安全防盗已成为社会问题。而锁自古以来就是把守门户的铁将军，人们对它的要求甚高，既要安全可靠的防盗，又要使用方便，这也是制锁者长期以来研制的主题。目前国内，大部分人使用的还是传统的机械锁。然而，眼下假冒伪劣的机械锁泛滥成灾，互开率非常之高。所谓互开率，是各种锁具的一个技术质量标准，也就是1把钥匙能开几把锁的比率。经国家工商局、国家内贸局、中国消协等部门对锁具市场的调查，发现个别产品的互开率居然超标26倍。 为何弹子锁的“互开率”会如此之高？据有关专家人士剖析，弹子锁质量好坏主要取决于弹子数量的多少以及弹子的大小，而弹子的多少和大小受一定条件的限制。此外，即使是一把质量过