【正文】 l System, has broad application prospects. Based on this thinking, this paper gives out the realization of the specific design, but also to be further study on the expansion, such as the use of Inter access to replace RS485 interconnection, expanding the size of the system.Keywods： Access Control System； Radio Frequency Identification； MF RC500； Proximity Coupling Device； Serial Communication.基于射頻識別技術(shù)的門禁系統(tǒng)的設(shè)計(jì)IV目錄摘要 ................................................................................................................................IABSTRACT ..................................................................................................................II第 1 章 緒論 .................................................................................................................1 課題背景及意義 ..................................................................................................1 國內(nèi)外研究發(fā)展現(xiàn)狀 ........................................................................................2 本文主要研究內(nèi)容 ..............................................................................................3第 2 章 門禁系統(tǒng)的技術(shù)基礎(chǔ) ......................................................................................5 射頻識別技術(shù) ......................................................................................................5 射頻識別技術(shù)原理 ...................................................................................5 RFID 天線 ................................................................................................6 射頻識別系統(tǒng)的典型結(jié)構(gòu) .......................................................................8 RFID 同其它自動識別技術(shù)的比較 .........................................................9 門禁系統(tǒng)結(jié)構(gòu)原理 ..........................................................................................10 密碼技術(shù) .........................................................................................................12第 3 章 基于射頻識別的門禁系統(tǒng)總體設(shè)計(jì) ............................................................16 系統(tǒng)總體方案設(shè)計(jì) ..........................................................................................16 系統(tǒng)設(shè)計(jì)的基本要求 .................................................................................16 系統(tǒng)方案 .....................................................................................................17 系統(tǒng)硬件模塊分析 ..........................................................................................17 射頻讀寫模塊分析 .....................................................................................17 其他部分硬件分析 .....................................................................................18 射頻讀寫模塊設(shè)計(jì) ..........................................................................................19 直接匹配天線 ..................................................................................................20 EMC 電路 ....................................................................................................20 接收電路 .....................................................................................................20 直接匹配天線的天線匹配電路 .................................................................21 RS485 通訊模塊 ..............................................................................................25 RS485 接口 .............................................................................................26 RS485 網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu) .............................................................................27 外圍接口電路 ..................................................................................................29 看門狗電路 .............................................................................................29 液晶模塊 .................................................................................................313. 7 數(shù)據(jù)存儲的硬件設(shè)計(jì) ...................................................................................353. 7. 1 數(shù)據(jù)存儲器的接口 .................................................................................363. 7. 2 I2C 總線協(xié)議 ..........................................................................................36 實(shí)時(shí)時(shí)鐘的硬件設(shè)計(jì) ....................................................................................373. 8. 1 實(shí)時(shí)時(shí)鐘的接口 .....................................................................................373. 8. 2 時(shí)鐘數(shù)據(jù)傳輸?shù)目刂?.............................................................................383. 8. 3 時(shí)鐘數(shù)據(jù)傳送方式 .................................................................................38 非接觸式 IC 卡的選擇 .................................................................................39 門禁控制電路 ...............................................................................................40高校在職碩士論文V第 4 章 基于射頻識別的門禁系統(tǒng)軟件設(shè)計(jì) ............................................................42 系統(tǒng)軟件分析與設(shè)計(jì) ........................................................................................42 軟件設(shè)計(jì)方法與設(shè)計(jì)語言選擇 .................................................................42 系統(tǒng)總體程序流程設(shè)計(jì) .............................................................................42 系統(tǒng)軟件模塊化設(shè)計(jì) ........................................................................................42 射頻控制模塊 .............................................................................................43 看門狗模塊 .................................................................................................46 數(shù)據(jù)存儲模塊 .............................................................................................46 通訊模塊 .....................................................................................................48 模塊子程序編譯調(diào)試 ........................................................................................54 實(shí)驗(yàn)樣機(jī) ............................................................................................................56總結(jié)與展望 ..................................................................................................................58參考文