此論文適合電子通信專業(yè)的學(xué)生....



基于單片機的電子秤設(shè)計


摘  要


　　　電子秤是將檢測與轉(zhuǎn)換技術(shù)、計算機技術(shù)、信息處理、數(shù)字技術(shù)等技術(shù)綜合一體的現(xiàn)代新型稱重儀器。它與我們?nèi)粘Ｉ罹o密結(jié)合成為一種方便、快捷、稱量精確的工具，廣泛應(yīng)用于商業(yè)、工廠生廠、集貿(mào)市場、超市、大型商場、及零售業(yè)等公共場所的信息顯示和重量計算。

　　　電子稱主要以單片機作為中心控制單元，通過稱重傳感器進行模數(shù)轉(zhuǎn)換單元，在配以鍵盤、顯示電路及強大軟件來組成。電子稱不但計量準確、快速方便，更重要的自動稱重、數(shù)字顯示，對人們生活的影響越來越大，廣受歡迎。

　　　本系統(tǒng)針對電子稱的自動稱重、數(shù)據(jù)處理等進行了設(shè)計和制作。為了闡明用單片機是如何對采樣數(shù)據(jù)進行處理，對數(shù)據(jù)的采集和轉(zhuǎn)換、計算問題進行了研究，討論了單片機控制系統(tǒng)中關(guān)鍵的計算問題。本文在給出智能電子稱硬件設(shè)計的基礎(chǔ)上，詳細分析了電子稱的軟件控制方法。單片機控制的電子稱結(jié)構(gòu)簡單，成本低廉，深受人們的喜愛，本文將對此進行詳細討論。


關(guān)鍵詞：電子稱；單片機；稱重傳感器


 Electrnoic Scale Design Based on MCU


Abstract


　　　Intelligent electronic scale is the detection and conversion technology, computer technology, information processing, digital technology, an integrated modern technology of new weighing equipment. It is closely integrated with our daily lives into a convenient, fast, precision weighing instrument, widely used in commercial, plant health plant, country markets, supermarkets, shopping malls, and retail and other public places, information display and weight.

　　　Intelligent Electronics said the key to SCM as the central control unit, through the weighing sensor analog-digital conversion unit, in the accompanied keyboard, display circuit and powerful software to component. Said not only accurate measurement of the electronic, fast and convenient, more importantly, automatic weighing, statistics show that by the majority of users. Intelligent Electronics said that as easy to carry, easy to use, the impact on people's lives more and more.

　　　This system is known for the electronic automatic weighing and data processing of research. To illustrate how to use the MCU is sampling data processing, data acquisition and conversion, computational problems studied. Discuss the key SCM system calculation. This paper presented the hardware design of intelligent electronics that, based on detailed analysis of the electronic control, said the software. As the structure of microprocessor controlled electronics that simple, low cost and very popular, this will be discussed in detail.

　　　

Keywords: electronic scale; MCU; Load sensor

　　　

目錄


1 緒  論 1

1.1 稱重技術(shù)和衡器的發(fā)展 1

1.2 電子秤的組成 2

1.2.1電子秤的基本結(jié)構(gòu) 2

1.2.2電子秤的工作原理 2

1.2.3電子秤的計量性能 2

1.3本設(shè)計思路 3

2 系統(tǒng)方案論證與選型 5

2.1控制器部分 5

2.2數(shù)據(jù)采集部分 7

2.2.1傳感器的選擇 7

2.2.2放大電路選擇 8

3硬件設(shè)計 10

3.1 總體規(guī)劃 10

3.2 主控制器電路 10

3.3 傳感器放大電路 11

3.4 顯示電路 11

4 軟件設(shè)計 14

4.1 系統(tǒng)應(yīng)用程序組成 14

4.2 主程序流程圖 15

4.3 AD采樣程序塊 15

4.4 液晶顯示程序塊 16

4.5 稱重數(shù)據(jù)處理技術(shù) 21

5 總結(jié)與展望 23

致  謝 25

參考文獻 26

附錄一 電路原理圖 27

附錄二 系統(tǒng)實物圖 28