【正文】 贏利為目的前提下，學(xué)校可以公布論文的部分或全部內(nèi)容。本人完全意識到本聲明的法律后果由本人承擔(dān)。作者簽名： 日期： 年 月 日導(dǎo)師簽名： 日期： 年 月 日蘭州理工大學(xué)畢業(yè)設(shè)計說明書V目 錄摘 要 ................................................................................................................................................................IABSTRACT ..............................................................................................................................................................II第一章 緒 論 ............................................................................................................................................1 選題背景 .............................................................1 主要設(shè)計（研究）內(nèi) 容 ................................................2 系統(tǒng)主要技術(shù)指標(biāo) .....................................................2 解決的關(guān)鍵問題 .......................................................2第二章 系統(tǒng)總體結(jié)構(gòu)方案設(shè)計................................................................................................................3 系統(tǒng)總體結(jié)構(gòu)及其功能 .................................................3 方案設(shè)計 .............................................................3 方案一 .............................................................3 方案二 .............................................................4 方案的論證 ...........................................................4 AVR 系列 ...........................................................4 51 系列 ............................................................5 方案的確定 ...........................................................5第三章 系統(tǒng)的硬件設(shè)計 ................................................................................................................................7 單片機(jī) ...............................................................7 采集模塊 .............................................................8 惠斯登電橋 .........................................................8 稱重傳感器 WPL110 ..................................................9 OP07 芯片 .........................................................11 TLC0838 芯片 ......................................................13 小結(jié) .............................................................15 鍵盤模塊 ............................................................16 顯示模塊 ............................................................17 通訊模塊 ............................................................18 RS485 的優(yōu)點(diǎn) .....................................................18蘭州理工大學(xué)畢業(yè)設(shè)計說明書VI MAX485 芯片 .......................................................19 看門狗模塊 ..........................................................20 MAX813L 芯片 ......................................................20 24C02 芯片 ........................................................23 報警模塊 ............................................................24 電源模塊 ...........................................................24第四章 軟件設(shè)計 ..........................................................................................................................................26 系統(tǒng)主程序的設(shè)計 ....................................................26 設(shè)計思想 .........................................................26 資源分配 .........................................................26 主程序流程圖 .....................................................26 參數(shù)恢復(fù)子程序的設(shè)計 ................................................27 設(shè)計思想 .........................................................27 資源分配 .........................................................28 參數(shù)恢復(fù)子程序流程圖 .............................................28 看門狗中斷子程序的設(shè)計 ..............................................30 設(shè)計思想 .........................................................30 資源分配 .........................................................30 看門狗中斷子程序流程圖 ...........................................31 通訊子程序的設(shè)計 ....................................................32 設(shè)計思想 .........................................................32 資源分配 .........................................................33 通訊子程序流程圖 .................................................33 鍵盤子程序的設(shè)計 ....................................................34 設(shè)計思想 .........................................................34 資源分配 .........................................................35 鍵盤子程序流程圖 .................................................35 采集子程序的設(shè)計 ....................................................36 設(shè)計思想 .........................................................36 資源分配 .........................................................36 采集子程序流程圖 .................................................37 顯示子程序的設(shè)計 ....................................................38 設(shè)計思想 .........................................................38 資源分配 .........................................................38蘭州理工大學(xué)畢業(yè)設(shè)計說明書VII 顯示子程序流程圖 .................................................39第五章 總結(jié) ......................................................................................................................................................40 系統(tǒng)先進(jìn)性 ..........................................................40 系統(tǒng)局限性 ..........................................................40參考文獻(xiàn)..............................................................................................................................................................41英文原文及翻譯 ...............................................................................................................................................43原文 ...................................................................43翻譯 ...................................................................49致謝 .......................................................................................................................................................................53附錄 .............................................................................................................................