基于单片机的指纹识别系统设计+PCB电路图
时间:2019-01-13 16:30 来源:毕业论文 作者:毕业论文 点击:次
| 基于单片机的指纹识别系统设计摘要：在现代社会越来越快速的发展下，我们对效率高、靠谱的身份识别系统的要求越来越高，现有的身份识别方法有密码、身份证等等各种各样的，还包括了IC卡等，但是它们存在着可破解、可顶替、可盗取、可假造等等缺点，因此人们已经不相信他们可以满足现代社会的经济活动以及安全防范甚至保护个人隐私的需求。而且随着时间过去，关于识别的技术也越来越先进，人的指纹、声线、视网膜、掌纹以及面部特征等这些基于人体的特征的技术已经慢慢的出现在群众的视线当中，并且颇受群众信任,其中最受追捧的就是指纹识别。 这次设计我们是主要通过单片机来对指纹实现录入、识别以及删除的功能。指纹由指纹识别器的光学头采集进数据库，使用按键切换模式，以此达到对指纹的登记与识别等。而当前指纹识别系统的状态信息我们是通过液晶LCD12864进行显示的;最后运用蜂鸣器提醒我们指纹录入的是否成功以及识别状态和删除状态的正确与否。32726 毕业论文关键词：指纹识别 指纹识别传感器 单片机 液晶屏LCD12864 Design of fingerprint identification system based on chip microcomputer Abstract: With the development of the times, the society needs more and more efficient, reliable identification system. The traditional personal identification methods such as password, identity documents, or the IC card identification have weakness as can be faked, forged, theft or deciphered. So it can’t fully meet the needs of modern social economic activities and social security. With the recognition technology becoming mature, the identification system based on characteristics of human physiology such as the fingerprint, palm, voice, retina, pupil and pattern recognition technologies have emerged from the laboratory. At present, from a practical point of view, the technology of fingerprint identification is the identification method is better than other biometric recognition technology. In the design,The collection, identification, and deletion of the fingerprint are controlled by the MCU. The fingerprints are collected by the optical sensor and the button is used to change the mode for collection and identification of the fingerprint. The states of the system are displayed on 12864 LCD. And the buzzer is used to alert whether the collection, identification and deletion are correct or not. Keywords: Fingerprint identification Fingerprint sensor Microcontroller LCD12864 目录 1.绪论 1 1.1指纹识别的基本概念 1 1.2指纹识别的历史发展及前景 2 1.2.1指纹识别的历史 2 1.2.2指纹识别的发展前景 3 1.3指纹识别课题设计的内容与意义 3 2.指纹识别基本原理 5 2.1人类的指纹特征 5 2.1.1指纹的总体特征 5 2.1.2指纹的局部特征 5 2.2总体设计 6 3. 硬件设计 7 3.1系统电路图 7 3.2 STC89C52单片机简介 7 3.3 51单片机最小系统 9 3.3.1晶振电路设计 9 3.3.2复位电路的设计 10 3.4电源电路设计 10 3.5按键控制部分电路 11 3.6LED指示灯电路 12 3.7指纹传感器模块 12 3.8报警模块 15 4.软件程序设计 16 4.1主要的流程 16 4.2流程图 16 4.2.1指纹录入模块 16 4.2.2指纹识别模块 18 (责任编辑：qin) |