【正文】 ......................................................................................................1 論文主要內(nèi)容和預(yù)期目標(biāo) ..............................................................................................2 論文組織結(jié)構(gòu) ..................................................................................................................22 稱(chēng)重系統(tǒng)總體方案設(shè)計(jì) .........................................................................................................4 稱(chēng)重系統(tǒng)基本工作原理 ..................................................................................................4 稱(chēng)重系統(tǒng)模塊方案設(shè)計(jì) ..................................................................................................4 主控制器模塊方案設(shè)計(jì) ..........................................................................................4 數(shù)據(jù)采集模塊方案設(shè)計(jì) ..........................................................................................4 數(shù)據(jù)顯示模塊方案設(shè)計(jì) ..........................................................................................5 電源管理模塊方案設(shè)計(jì) ..........................................................................................6 設(shè)計(jì)方案總結(jié) ..................................................................................................................63 稱(chēng)重系統(tǒng)硬件設(shè)計(jì) .................................................................................................................7 MSP430 單片機(jī)最小系統(tǒng)設(shè)計(jì) .......................................................................................7 MSP430 單片機(jī)介紹 ...............................................................................................7 MSP430 單片機(jī)接口電路設(shè)計(jì) ...............................................................................8 電源管理模塊設(shè)計(jì) ........................................................................................................11 5V 轉(zhuǎn)換電路 ...........................................................................................................11 轉(zhuǎn)換電路 ........................................................................................................12 信號(hào)采集模塊電路設(shè)計(jì) ................................................................................................12 工作原理 ................................................................................................................12 信號(hào)檢測(cè)電路設(shè)計(jì) ................................................................................................14 信號(hào)調(diào)理電路設(shè)計(jì) ........................................................................................................15 AD620 工作原理 ....................................................................................................15 信號(hào)放大電路 ........................................................................................................16 AD 轉(zhuǎn)換電路設(shè)計(jì) .........................................................................................................16 SD16 概覽 ..............................................................................................................16 轉(zhuǎn)換接口電路設(shè)計(jì) ................................................................................................17 顯示電路設(shè)計(jì) ................................................................................................................17 硬件電路設(shè)計(jì)小結(jié) ........................................................................................................194 稱(chēng)重系統(tǒng)軟件設(shè)計(jì) ...............................................................................................................20 主程序設(shè)計(jì) ....................................................................................................................20 初始化程序模塊 ............................................................................................................21 AD 采集與數(shù)據(jù)處理程序模塊 .....................................................................................22 LCD 顯示程序模塊 .......................................................................................................23 軟件設(shè)計(jì)小結(jié) ................................................................................................................245 調(diào)試與總結(jié) ...........................................................................................................................25 調(diào)試中遇到問(wèn)題及解決方案 ........................................................................................25 結(jié)論 ................................................................................................................................25致謝 ...........................................................................................................................................26參考文獻(xiàn) ...................................................................................................................................27附錄 ?.........................................................................................................................................28附錄 II .......................................................................................................................................29 摘要電子秤是日常生活中常用的電子衡器，智能電子秤測(cè)量準(zhǔn)確、快速，易于實(shí)時(shí)測(cè)量和監(jiān)控，成為測(cè)量領(lǐng)域的主流產(chǎn)品。系統(tǒng)使用橋式應(yīng)變片傳感器測(cè)量重物并輸出電壓信號(hào)，經(jīng)過(guò)信號(hào)調(diào)理電路放大濾波后，經(jīng)模數(shù)轉(zhuǎn)換將信息傳至單片機(jī)處理，同時(shí)將重量實(shí)時(shí)顯示。關(guān)鍵詞：MSP430 ；稱(chēng)重傳感器；LCD；I AbstractElectronic scale is a electron weighing apparatus used in everyday life, intelligent electronic scales measurement accuracy, fast, easy to realtime measuring and monitoring, bee the mainstream of the fields products.This design is a weighing system based on MSP430 MCU, which can realize the 0 ~ 500g clog precision measurement. The system hardware circuit including MSP430 microcontroller smallest system, sensor circuit, signal regulate circuit, AD acquisition circuit, LCD display circuit, power management circuit to wait for a few parts. Systems use bridge type strain film sensor measuring weight and output voltage signal, after filtered signal disposal circuit, the amplification frequencyfield handed to SCM processing information, and will weight realtime displa