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導教師簽名: 日 期: 使用授權(quán)說明 本人完全了解 大學關于收集、保存、使用畢業(yè)設計(論文)的規(guī)定,即:按照學校要求提交畢業(yè)設計(論文)的印刷本和電子版本;學校有權(quán)保存畢業(yè)設計(論文)的印刷本和電子版,并提供目錄檢索與閱覽服務;學??梢圆捎糜坝 ⒖s印、數(shù)字化或其它復制手段保存論文;在不以贏利為目的前提下,學??梢怨颊撐牡牟糠只蛉績?nèi)容。除了文中特別加以標注引用的內(nèi)容外,本論文不包含任何其他個人或集體已經(jīng)發(fā)表或撰寫的成果作品。本人完全意識到本聲明的法律后果由本人承擔。本人授權(quán) 大學可以將本學位論文的全部或部分內(nèi)容編入有關數(shù)據(jù)庫進行檢索,可以采用影印、縮印或掃描等復制手段保存和匯編本學位論文。 作者簽名: 日期: 年 月 日 導師簽名: 日期: 年 月 日 2021 年 山 東 省 凌 陽 杯 大 學 生 電 子 設 計 競 賽 4 摘要 : 本系統(tǒng)是以凌陽 16 位單片機 SPCE061A 為控制核心而設計的具有高分辨率高速 A/D轉(zhuǎn)換器,實現(xiàn)了對模擬電壓的實時測量和顯示,并具有鍵盤設定、步進、 液晶顯示設定值和測量值、語音提示等功能。不僅完全實現(xiàn)了題目中的基本要求和發(fā)揮部分,并在此基礎上有所創(chuàng)新。 關鍵詞: SPCE061A, 模擬電壓信號,數(shù)模轉(zhuǎn)換 , 模數(shù)轉(zhuǎn)換,光耦隔離 Abstract: With sunplus’ 16 bits single chip——SPCE061A as its control core, the system we designed is an Analog to Digital Converter of high resolving power and high speed. It can measure and display the analog voltage in realtime. What’s more, the keyboard presetting, displaying the given value with LED and actual measuring value with LCD, step and voice reminding make our system’ functions. Initial voltage is given by the frequency to voltage circuit, and the optical coupling isolator is added to realize the isolation of A/D conversion circuit and measuredisplay circuit. It has pletely realized both the basic requests and the extended part, furthermore, it has the innovation in this foundation. The high speed of AD conversion, the friendly operating menu and voice playing are the shining points of our design. Key Words: SPCE061A , Simulated Voltage Signal , Analog to Digital Converter, Digital to Analog Converter, the Optical Coupling Isolator 2021 年 山 東 省 凌 陽 杯 大 學 生 電 子 設 計 競 賽 5 目 錄 1 設計任務與要求 ......................................................................................... 7 設計任務 .......................................................................................................................... 7 設計要求 ......................................................................................................................... 7 1. 2. 1 基本要求 ............................................................................................................... 7 1. 2. 2 發(fā)揮部分 ............................................................................................................... 7 1. 2. 3 創(chuàng)新部分 ............................................................................................................... 8 2 設計原理及方案選擇 ................................................................................ 8 總體設計思想 ................................................................................................................ 8 模塊設計原理與選擇 .................................................................................................... 8 2 .2. 1 AD轉(zhuǎn)換原理 .......................................................................................................... 9 AD 轉(zhuǎn)換方案 ...................................................................................................... 10 D/A 模塊 ............................................................................................................... 12 控制模塊 ............................................................................................................... 16 信號源模塊 ............................................................................................................. 16 電氣隔離方案 ......................................................................................................... 17 鍵盤顯示模塊 ......................................................................................................... 17 語音模塊 ............................................................................................................... 19 時鐘模塊方案 ....................................................................................................... 19 最終方案: ....................................................................................................... 20 3 單元電路計算與實現(xiàn) ................................................................................ 20 直流電源電 路 ............................................................................................................... 20 控制器模塊電路 ............................................................................................................ 22 最小系統(tǒng) ................................................................................................................. 22 I/O 口分配如下: .............................................................................................. 23 信號源模塊電路 ........................................................................................................... 24 鍵盤 LED 顯示電路 .................................................................................................... 25 鍵盤顯示芯片 ......................................................................................................... 25 鍵盤設置 ................................................................................................................. 26 時鐘電路 ....................................................................................................................... 26 時鐘引腳 ................................................................................................................. 26 外圍電路 ............................................................................................................. 27 語音電路 ...................................................................................................................... 27 A/D 轉(zhuǎn)換部分 .............................................................................................................. 28 采樣保持電路 ....................................................................................................... 28 A/D