【正文】
硬件設(shè)計思想 ............................................................................................................ 3 硬件電路設(shè)計 .............................................................................................................. 4 多路轉(zhuǎn)換開關(guān) .................................................................................................... 4 前置放大電路 .................................................................................................... 6 采樣 /保持電路 ................................................................................................... 8 模 /數(shù)轉(zhuǎn)換電路 ................................................................................................. 12 數(shù) /模轉(zhuǎn)換電路 ................................................................................................. 17 硬件和單片機的連接電路 .............................................................................. 22 第三章 系統(tǒng)的軟件設(shè)計 .............................................................................................. 26 KEILC51 編譯器簡介 ............................................................................................... 26 uVision2 集成開發(fā)環(huán)境 .................................................................................... 26 編輯器和調(diào)試器 .............................................................................................. 27 程序流程圖 ................................................................................................................ 28 主程序流程圖 ................................................................................................... 28 A/D 轉(zhuǎn)換程序 的 流程圖 和 D/A 轉(zhuǎn)換 程序的 流程圖 ................................... 29 系統(tǒng)總圖 .................................................................................................................... 30 第四章 系統(tǒng)性能及誤差分析 ....................................................................................... 31 系統(tǒng)可靠性措施 ......................................................................................................... 31 低功耗措施 ....................................................................................................... 31 抗干擾措施 ....................................................................................................... 31 第五章 結(jié)論 ........................................................................................................................ 32 致 謝 ............................................................................................................................... 33 參考文獻(xiàn) ............................................................................................................................... 34 湖南科技大學(xué)本科生畢業(yè)設(shè)計(論文) ii 附錄 1 ..................................................................................................................................... 35 附錄 2(系統(tǒng)硬件總圖) ................................................................................................ 38 湖南科技大學(xué)本科生畢業(yè)設(shè)計(論文) 1 第一章 引言 多路數(shù)據(jù)采集系統(tǒng)簡介 在工業(yè)生產(chǎn)和科學(xué)技術(shù)研究過程的各行業(yè)中,常常要對各種數(shù)據(jù)進(jìn)行采集,隨著現(xiàn)代化工業(yè)的發(fā)展,多路數(shù)據(jù)采集系統(tǒng)成為日益重要的技術(shù) , 廣泛應(yīng)用于工農(nóng)業(yè)等行業(yè)。 AT89S51 microcontroller。 關(guān)鍵詞: 數(shù)據(jù)采集; AT89S51 單片機 ; CD4051; DAC0832 ABSTRACT Completed the design of the main AT89S51 Microcontroller based data acquisition system hardware design and the corresponding software design. The hardware design of the system include: multiswitch and preamplifier circuit design, sample and hold circuit, ADC circuit design, digital to analog conversion circuit. Multiswitch and preamplifier circuit design highlights the choice of multiway switch, AD521, and the calculation of the magnification CD4051 MUX hardware connection circuit and amplifier AD521. Sample and hold circuit design focuses on the principles of sample and hold circuit and the main parameters and sample and hold circuit for the selection and connection. Analogdigital conversion circuits focused on the design of the system A / D channel selection and A / D converter of the error analysis and A / D converter AD574 introduction, input and connection circuits. Digitalanalog conversion circuit design highlights the D / A channel selection, D / A converter selection and D / A converter DAC0832 introduction, connecting the output circuit and the DAC0832. It also describes the hardware design, the choice of microcontroller, microcontroller AT89S51 the clock circuit and reset circuit. The software design includes the choice of piler, various parts of the flow chart and program design. This design also analyzed the system performance and errors. The design is basically realized the design of multichannel data acquisition, but because of tight time and limited knowledge of their own reasons, not the entire system is designed for debugging and simulation, and thus have not been able to make inkind out。 本 設(shè)計中還分析了系統(tǒng)的性能及誤差。 硬件 設(shè)計中還介紹了單片機的選擇,單片機 AT89S51 的時鐘電路和復(fù)位電路。模數(shù)轉(zhuǎn)換電路的設(shè)計中重點介紹了系統(tǒng)A/D 通道的選擇和 A/D 轉(zhuǎn)換器的各項誤差分析以及 A/D 轉(zhuǎn)換器 AD574 的介紹、輸入方式和連接電路。多路轉(zhuǎn)換開關(guān)及前置放大電路的設(shè)計中重點介紹了多路開關(guān)的選擇、 AD521 放大倍數(shù)的計算以及多路開關(guān) CD4051 和放大器 AD521 硬件連接 電路 。 畢 業(yè) 設(shè) 計( 論 文 ) 題目 單片機控制的多路數(shù)據(jù)采集系統(tǒng) 畢業(yè)設(shè)計(論文)任務(wù)書 信息與電氣工程學(xué)院 院 通信工程 系(教研室) 系(教研室)主任 : (簽名) 年 月 日 1 設(shè)計(論文)題目及專題: 單片機控制的多路數(shù)據(jù)采集系統(tǒng) 2 學(xué)生設(shè)計(論文)時間:自 2021 年 2 月 20 日開始至 2021 年 6月 5 日止 3 設(shè)計(論文)所用資源和參考資料: ( 1) 單片機原理與實用技術(shù) ( 2) Bernard Rose. Analog to Digital and Digital to Analog Conversion ( 3) 數(shù)據(jù)采集與處理技術(shù) 4 設(shè)計(論文)應(yīng)完成的主要內(nèi)容: ( 1)介紹多路數(shù)據(jù)采集的發(fā)展歷史、現(xiàn)況及將來的發(fā)展趨勢 ( 2) 簡介單片機的原理、作用 ( 3)多路數(shù)據(jù)采集的總體設(shè)計框圖 ( 4)多路數(shù)據(jù)采集系統(tǒng)設(shè)計及原理說明 ( 5)多路數(shù)據(jù)原理圖設(shè)計及說明 5 提交設(shè)計(論文)形式(設(shè)計說明與圖紙或論文等)及要求: ( 1)論文文本格式嚴(yán)格按照學(xué)校對本科畢業(yè)生 論文