基于单片机的指纹识别系统设计毕业论文_精品.doc

本科毕业论文 基于单片机的指纹识别系统设计 摘 要 科学技术的发展在让社会进步的同时，也让传统的安全管理系统受到威胁。生物识别技术的出现给身份识别的研究带来了突飞猛进的发展。每个人都有着自己特有的特征，用本身的特征来验证身份有着得天独厚的优势。本文概述了自动指纹识别系统的研究现状和指纹识别系统的算法流程，以及在此基础上的指纹图像的分割算法和指纹图像细化算法，并完成基于单片机的指纹识别系统硬件电路设计。 应用TFS-M51指纹识别模块，设计基于单片机的指纹识别硬件电路，形成一个独立的指纹识别系统。该系统实现单片机和指纹模块之间的串口通信。通过操作独立式键盘按键，向指纹模块的DSP芯片发送相应指令，从而执行添加用户、删除指定用户、删除全部用户、认证用户，以及管理用户权限等功能。 关键词：生物识别技术；指纹识别；串口通信；单片机 ABSTRACT The development of science and technology made the social go forward, but at the same time it also makes the traditional safety management system under threaten at the same time. The emergence of biometric technologies brought a rapid development for the research of identification. For everyone has their own special features, with the characteristics of itself to verify identity has a unique advantage. Automatic fingerprint identification technology has been widely used in public security, such as the customs, the bank, the network security and other places which need identification. This article provides an overview of the research of fingerprint identification system in present situation and the algorithm flow of it. On this basis, to do an analysis of the fingerprint image segmentation algorithm and the fingerprint image thinning algorithm, including the microcontroller-based?fingerprint identification system hardware circuit design. With the application of TFS-M51 fingerprint module, I designed a hardware circuit system of fingerprint identification based on the MCU, in order to form an independent fingerprint identification system. The means of communication between MCU and fingerprint module in the system is based on serial communication. MCU sends a corresponding instruction to the fingerprint DSP chip module through stand-alone keyboard keys, in order to execute the functions, such as Add User, Delete the Specified User, Delete All Users, Authenticated Users, and Manage User Permissions and so on. Key words: Biometric technology; Fingerprint identification; Serial Communications; MCU (