基于单片机的指纹识别系统设计+PCB电路图
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