【正文】 1 攀枝花學(xué)院專業(yè)課課程設(shè)計實驗報告 基于 DSP 的高速采樣系統(tǒng)設(shè)計 學(xué)生姓名： xxxx 學(xué)生學(xué)號： xxxxxxxxxxxxx 院（系）： xxxxxxxxxxxxxxx 年級專業(yè)： 電子信息工程 x 指導(dǎo)教師： 陳 老 師 二〇一三年十二月 2 摘 要 交流采樣是電網(wǎng)進行微機保護的重要一步，交流采樣方法的優(yōu)劣直接影響到微機保護的效果。本系統(tǒng)應(yīng)用 DSP 制作交流采樣電路，使其實現(xiàn)高速、準(zhǔn)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。 本文介紹了應(yīng)用 DSP 實現(xiàn)對交流信號的采樣硬件電路設(shè)計，論文總共分為四個部分。（ 1）介紹交流采樣的基本結(jié)構(gòu)，設(shè)計思路，并分析目前交流采樣的幾種方式；（ 2）通過對交流采樣對象的分析，確定采樣的參數(shù)大小并設(shè)計基于 F2812 的采樣電路；（ 3）運用 利用設(shè)計的程序?qū)Σ蓸与娐愤M行試驗，得出電路的誤差并進行分析；（ 4）通過上述設(shè)計，能夠完成對交流信號的采集、處理并將所需數(shù)值顯示出來。滿足設(shè)計要求。 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(xué)習(xí)中進一步完善。 關(guān)鍵詞： 交流采樣， DSP,微機保護 3 ABSTRACT The exchange sampling is the electrical work carries on the microputer to protect importantly one step, the exchange sampling method39。s protects fit and unfit quality immediate influence the effect which to the microputer. This system applies the DSP manufacture exchange sampling circuit, causes it to realize high speed, the accurate exchange sampling, realizes the simulation microputer protective trip function through the software control. This article introduced realizes using DSP to exchanges the signal sampling hardware circuit design, the paper altogether divides into four parts. (1) introduced that the exchange sampling the basic structure, the design mentality, and analyzes the present exchange sampling several ways。 (2) through to exchanges the sampling object analysis, the definite sampling39。s parameter size and designs based on the F2812 sampling circuit。 (3) carries on the experiment using using the design procedure to the sampling circuit, obtains electric circuit39。s error and carries on the analysis。 (4) through the above design, can plete to exchanges signal gathering, processing and will need the value to demonstrate, satisfies the design requirements. Because the time, the level are limited, this system has not realized with puter39。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(shè)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(shù)指標(biāo) ........................................................................ 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(jié)構(gòu)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(shè)計方案 .................................................................. 20 硬件電路設(shè)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(shè)計 .............................................................................. 21 .............................................................................................................. 21 跟隨電路 .............................................................................................................. 22 二階低通有源濾波電路 ......................................................................................... 22 偏置電路 .............................................................................................................. 24