【正文】 ical work carries on the microputer to protect importantly one step, the exchange sampling method39。 本文介紹了應用 DSP 實現(xiàn)對交流信號的采樣硬件電路設計，論文總共分為四個部分。本系統(tǒng)應用 DSP 制作交流采樣電路，使其實現(xiàn)高速、準確的交 流采樣，通過軟件控制實現(xiàn)模擬微機保護跳閘功能。 由于時間、水平有限，本系統(tǒng)沒有實現(xiàn)與計算機的數(shù)據(jù)通信，將在日后工作 與學習中進一步完善。s parameter size and designs based on the F2812 sampling circuit。s data munication, will be working in the future and in the study further consummates. KEY WORDS: Exchange sampling, DSP, microputer protection 1 目 錄 第一章 緒 論 ................................................................................................................................. 1 研究背景與意義 ................................................................................................................. 1 研究現(xiàn)狀 ............................................................................................................................ 1 課題的總體設計思路 .......................................................................................................... 2 第二章 交流采樣系統(tǒng)的器件介紹 ................................................................................................... 3 DSP芯片介紹 .................................................................................................................... 3 DSP的特點 ............................................................................................................. 3 DSP TMS320 F2812芯片的技術指標 ........................................................................ 4 DSP F2812 開發(fā)板的管腳功能說明 .......................................................................... 4 運算放大器 LM324介紹 ..................................................................................................... 6 LM324工作原理 ...................................................................................................... 6 LM324的引腳、結構及其典型運用 .......................................................................... 8 LM2596介紹 .................................................................................... 12 LM2596的特點 ...................................................................................................... 12 LM2596的引腳及主要性能參數(shù) ............................................................................. 13 穩(wěn)壓芯片 TL431介紹 ....................................................................................................... 14 TL431工作原理 .................................................................................................... 14 TL431的引腳和其主要性能參數(shù) ........................................................................... 15 LED八段數(shù)碼管顯示器 .................................................................................................... 15 LED數(shù)碼管的分類 ................................................................................................ 15 .................................................................................................... 16 ................................................................................................ 17 74LS164移位寄存器介紹 ......................................................................................... 18 74LS164工作原理 ................................................................................................ 18 74LS164的引腳及級聯(lián) ......................................................................................... 18 第三章 基于 DSP的交流采樣系統(tǒng)硬件的總體設計方案 .................................................................. 20 硬件電路設計思路 .......................................................................................................... 20 總體電路的布局 .............................................................................................................. 20 電流互感器、電壓互感器電路的設計 .............................................................................. 21 .............................................................................................................. 21 跟隨電路 .............................................................................................................. 22 二階低通有源濾波電路 ......................................................................................... 22 偏置電路 .............................................................................................................. 24 反相電路 .............................................................................................................. 25 TL431 5V偏置電壓產(chǎn)生電路的設計 ................................................................................. 25 LM2596 5V電源的設計 .................................................................................................... 26 繼電保護電路的設計 ....................................................................................................... 27 合閘電路的設計 .............................................................................................................. 27 數(shù)碼管顯示電路的設計 ................................................................................................... 28 系統(tǒng)軟件的設計 ............................................................................................................ 28 2 第四章 系統(tǒng)的硬件調(diào)試和系統(tǒng)測試 .............................................................................................. 30 系統(tǒng)硬件的調(diào)試 .............................................................................................................. 30 采樣電路的調(diào)試 ................................................................................................... 30 .................................................................................................... 30 繼電保護電路的調(diào)試 ............................................................................................ 30 .................................................................................. 31 結 束 語 ...................................................................................................................................... 32 參考文獻