【正文】 電子與信息工程學(xué)院 本 科 畢 業(yè) 論 文 論文題目 簡易電子秤的設(shè)計 學(xué)生姓名 周 盼 學(xué) 號 073521029 專 業(yè) 電氣工程及其自動化 班 級 073521 指導(dǎo)教師 鄧方雄 2020 年 5 月 摘 要 I 摘 要 隨著微電子技術(shù)的應(yīng)用，市場上使用的傳統(tǒng)稱重工具已經(jīng)滿足不了人們的要求，為了改變傳統(tǒng)稱重工具在使用上存在的問題，在本設(shè)計中將智能化、自動化用在了電子秤系統(tǒng)中。此電子秤很大程度上滿足了應(yīng)用需求，具有很大的應(yīng)用前景。 本文以單片機 MCS51 系列的 AT89C51 集成電路為信息處理核心，提出電子秤的硬件設(shè)計方案，詳細(xì)的分析了各單元的硬件電路，給出了儀器電路設(shè)計和軟件流程，及相關(guān)電路圖、原理圖，最后介紹了系統(tǒng)的硬件調(diào)試和軟件調(diào)試。 關(guān) 鍵 詞 ：電子秤； AT89C51；硬件設(shè)計；電路圖 湖北科技學(xué)院學(xué)士學(xué)位論文 II ABSTRACT With the application of microelectronics technology, traditional weighing tools used in market has been not satisfaction with hunman requirements already. In order to change the traditional weighing tools problems, in this design, I apply intelligent and automation to electronic scales system. This electronic scale is largely to meet the application requirements, and has great application prospects. This article take SCM MCS51 series AT89C51 integrated circuit as information processing core， Put forward the scheme of hardware design of electronic scales， a detailed analysis of the various units of the hardware circuit, gives the instrument circuit design and software flow, and the related circuit diagram, schematic diagram, finally introduced the system of hardware debugging and software debugging. KEY WORDS: Electronic scale。 AT89C51。 Hardware design。 Circuit diagram 目 錄 III 目 錄 1 緒論 ...................................................................................................................................... 1 選題的背景和意義 ....................................................................................................... 1 研究現(xiàn)狀 ....................................................................................................................... 1 論文主要研究內(nèi)容 ....................................................................................................... 1 2 總體方案設(shè)計 ...................................................................................................................... 2 電子秤整體方案 ........................................................................................................... 2 主控制器的方案 ........................................................................................................... 2 稱重傳感器的方案 ....................................................................................................... 3 放大器的方案 ............................................................................................................... 4 模數(shù)轉(zhuǎn)換器的方案 ....................................................................................................... 5 鍵盤部分的方案 ........................................................................................................... 6 顯示部分的方案 ........................................................................................................... 6 過載報警部分的方案 ................................................................................................... 7 3 電子秤的硬件設(shè)計 .............................................................................................................. 8 系統(tǒng)設(shè)計的總體思路 ................................................................................................... 8 單片機 AT89C51 最小系統(tǒng) ......................................................................................... 8 放大電路 ....................................................................................................................... 9 模數(shù)轉(zhuǎn)換器與單片機接口電路 ................................................................................. 10 顯示電路與單片機接口電路 ......................................................................................11 鍵盤電路與單片機接口電路 ..................................................................................... 12 報警電路 ..................................................................................................................... 13 電源電路 ..................................................................................................................... 13 4 電子秤系統(tǒng)的軟件設(shè)計 .................................................................................................... 15 主程序的設(shè)計 ............................................................................................................. 16 子程序的設(shè)計 ............................................................................................................. 16 模數(shù)轉(zhuǎn)換子程序的設(shè)計 ...................................................................................... 17 鍵盤掃描子程序的設(shè)計 ...................................................................................... 18 顯示子程序的設(shè)計 .............................................................................................. 19 價格計算子程序的設(shè)計 ...................................................................................... 20 報警子程序的設(shè)計 .............................................................................................. 21 5 系統(tǒng)調(diào)試 ............................................................................................................................ 22 湖北科技學(xué)院學(xué)士學(xué)位論文 IV 軟件調(diào)試 ..................................................................................................................... 22 硬件調(diào)試 ..................................................................................................................... 23 6 結(jié)論與展望 ........................................................................................................................ 24 論文的特點 ................................................................................................................. 24 研究展望 ..........................................................................