freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

基于單片機(jī)的智能數(shù)字電子秤設(shè)計(jì)-展示頁(yè)

2024-11-19 21:28本頁(yè)面
  

【正文】 業(yè)貿(mào)易和居民家庭的使用需求,具有廣闊的應(yīng)用前景。儀器主要功能有自檢、去皮、計(jì)價(jià)、單價(jià)設(shè)定、過(guò)載報(bào)警等。 智能電子秤主要由電源、稱(chēng)重傳感器、 A/D 轉(zhuǎn)換器、單片機(jī)、鍵盤(pán) /開(kāi)關(guān)、 LCD 顯示器等部分組成。多年來(lái),人們一直期待測(cè)量準(zhǔn)確、攜帶方便、價(jià)格低廉的智能電子秤投放市場(chǎng)。目 前,臺(tái)式電子秤在商業(yè)貿(mào)易中的使用已相當(dāng)普遍,但存在較大的局限性:體積大、成本高、需要工頻交流電源供應(yīng)、攜帶不便、應(yīng)用場(chǎng)所受到制約。 特此聲明。 本科畢業(yè)論文(設(shè)計(jì)) 論文(設(shè)計(jì))題目: 基于單片機(jī)的智能數(shù)字電子秤設(shè)計(jì) 學(xué) 院: 明德學(xué)院 專(zhuān) 業(yè): 電子信息工程 班 級(jí): 機(jī) 自 05151 學(xué) 號(hào): 0515174118 學(xué)生姓名: 劉小海 指導(dǎo)教師: 王 許 2020 年 6 月 貴州大學(xué)本科畢業(yè)論文(設(shè)計(jì)) 誠(chéng)信責(zé)任書(shū) 本人鄭重聲明:本人所呈交的畢業(yè) 論文(設(shè)計(jì)) ,是在導(dǎo)師的指導(dǎo)下獨(dú)立進(jìn)行研究所完成。畢業(yè) 論文(設(shè)計(jì)) 中凡引用他人已經(jīng)發(fā)表或未發(fā)表的成果、數(shù)據(jù)、觀點(diǎn)等,均已明確注明出處。 論文(設(shè)計(jì))作者簽名: 日 期: 2020 年 6 月 I 目錄 摘要 .................................................................. III Abstract ................................................................ IV 第一章 緒 論 .................................................. 1 稱(chēng)重技術(shù)和衡器的發(fā)展 ............................................. 1 電子秤的發(fā)展現(xiàn)狀和發(fā)展趨勢(shì) ....................................... 2 項(xiàng)目研究意義 ..................................................... 4 第二章 電子秤的硬件構(gòu)成 ................................................. 6 電子秤的構(gòu)成 .................................................... 6 稱(chēng)重傳感器 ...................................................... 6 稱(chēng)重傳感器選用時(shí)需考慮的問(wèn)題 .............................. 7 稱(chēng)重傳感器的基本結(jié)構(gòu) ...................................... 9 應(yīng)變式傳感器 .................................................... 11 彈性元件 ................................................. 11 應(yīng)變膠 ................................................... 12 應(yīng)變片 ................................................... 13 應(yīng)變式稱(chēng)重傳感器的各種補(bǔ)償 ............................... 14 單片機(jī)系統(tǒng) ...................................................... 16 電路設(shè)計(jì) ........................................................ 18 稱(chēng)重傳感器的供橋電源 ..................................... 18 電子秤的調(diào)零電路 ......................................... 20 電子秤的數(shù)據(jù)采集、處理部分 ............................... 20 鍵盤(pán) /開(kāi)關(guān)輸入電路 ........................................ 25 LCD 顯示器 ................................................ 26 打印部分 ................................................. 28 掉電保護(hù)和檢測(cè)電路、報(bào)警電路 ............................. 29 第三章 儀器軟件設(shè)計(jì) .................................................... 31 II 儀器主程序 ....................................................... 31 中斷服務(wù)程序 ..................................................... 32 第四章 儀器的誤差及誤差分配 ........................................... 33 儀器的誤差來(lái)源 ................................................... 33 稱(chēng)重傳感器的誤差 ........................................... 33 電子設(shè)備的誤差 ............................................ 33 機(jī)械承重系統(tǒng)的誤差 ......................................... 34 儀器誤差分配 .................................................... 35 儀器誤差的計(jì)算方法 .............................................. 35 結(jié)論 .................................................................... 37 參考文獻(xiàn) ................................................................ 38 致謝 .................................................................... 39 附錄 .................................................................... 40 III 基于單片機(jī)的智能數(shù)字電子秤設(shè)計(jì) 摘要 現(xiàn)代社會(huì)的發(fā)展,對(duì)稱(chēng)重技術(shù)提出了更高的要求?,F(xiàn)有的便攜秤為桿秤或彈簧壓縮、拉伸變形來(lái)實(shí)現(xiàn)計(jì)量的彈簧秤,居民用戶(hù)使用的是國(guó)家已經(jīng)明令淘汰的桿秤。 本文設(shè)計(jì)了一種智能電子秤,論述了儀器的工作原理,介紹了儀器的誤差來(lái)源于誤差分配,給出了儀器電路設(shè)計(jì)與軟件流程。主要技術(shù) 指標(biāo)為:稱(chēng)量范圍 0~ 15kg;分度值為 ;精度等級(jí)Ⅲ級(jí)。儀器若不進(jìn)行稱(chēng)量操作, 5分鐘后自動(dòng)進(jìn)入休眠模式,降低電源消耗。 關(guān)鍵詞: 智能電子秤, 稱(chēng)重傳感器, A/D 轉(zhuǎn)換器, 8051 單片機(jī), 誤差分析 , 軟件設(shè)計(jì) IV A design of the intelligence electronic scales of microcontroller Abstract The development of the modern society has put forward higher request on weighing technology. Currently, the desktop electronic scales have been great application in mercial trade, but they have many shortings such as large volume, high cost, not inconvenience to carry and AC supply power, so they are restricted to use. The usual portable scales are lever scales which are mostly used by residents and spring balance which measure through pression or drawing of spring. They are being rejected for their big measuring errors. People have been expecting cheap Intelligence electronic scales which can measure accurately and be carried conveniently for many years. This text designs a kind of intelligence electronic scales. It discusses the instrumental working principle, and introduces its error sources and how to distribute the error. Give instrument electric circuit design and software process. Intelligence electronic scales consist of power, and weighs to spread the machine, A/D conversion, keyboard/switch, list slice, LCD etc. Its technical indictors include : Measuring range from 0 to15 kg。 Ⅲ precision. The instrument possesses many intelligence functions, such as shelling, overload alarm, unit price enactment, accumulation putation, selfcalibrating and so on. For lowering power supply to consume, it can get into “sleep” automatically if the instrument is not measuring for 5 minutes. The intelligence electronic scales can measure mass rapidly and accurately and municate value. Furthermore, it is small, simply structured, easy to operate and convenient to carry. The instrument is able to meet the needs of mercial trade and residents, so its application has a bright future. Keyword: Intelligence electronic scales, Weigh to spread a feeling machine, A/D conversion, microcontroller 8051, Error margin analysis, Software design V 貴州大學(xué)本科畢業(yè)論文(設(shè)計(jì)) 第 1 頁(yè) 第一章 緒 論 質(zhì)量是測(cè)量領(lǐng)域中的一個(gè)重要參數(shù) ,稱(chēng)重技術(shù)自古以來(lái)就被人們所重視 ??1 。
點(diǎn)擊復(fù)制文檔內(nèi)容
黨政相關(guān)相關(guān)推薦
文庫(kù)吧 www.dybbs8.com
備案圖鄂ICP備17016276號(hào)-1