【正文】 題 目 ： 基于單片機(jī) 的 酒精濃度測試儀 設(shè)計 摘 要 2021 年以來，隨著中國經(jīng)濟(jì)的高速發(fā)展，人民生活水平的迅速提高，中國逐漸步入“汽車社會”， 酒后駕車 行為所造成事故越來越多，對社會的影響也越來越大， 酒精 正在成為越來越兇殘的“馬路殺手”。據(jù)有關(guān)資料統(tǒng)計，全世界每年因車禍喪生的人數(shù)就超過 60 萬人，留下永久性傷殘者在 400 萬以上，一般受傷者則不計其數(shù)。在許多國家，車禍已成為第一位意外死亡原因。 此外， 因為交通事故 造成的經(jīng)濟(jì)損失也相當(dāng)驚人。據(jù)事故調(diào)查統(tǒng)計，大約 50%— 60%的車禍 與飲酒有關(guān)。 中國公安部門 在 2021 年 8 月，在全國各地加強(qiáng)查處酒后駕駛的力度，以減少由酒后駕駛造成的惡性交通事故。要查處就涉及到檢測人體內(nèi)的酒精含量和使用設(shè)備來進(jìn)行檢測的問題。 本文研究設(shè)計了一種用于公共場所 具有檢測及超限報警功能的 酒精濃度 智能測試儀。其設(shè)計方案基于 89C51 單片機(jī)， MQ3 酒精濃度 傳感器。系統(tǒng)將傳感器輸出的 4~20mA的標(biāo)準(zhǔn)信號通過以 AD0832 為核心的 A/D 轉(zhuǎn)換電路調(diào)理后，經(jīng)由單片機(jī)進(jìn)行數(shù)據(jù)處理，最后由 LCD顯示 酒精 濃度值。文中詳細(xì)介紹了數(shù)據(jù)采集子系統(tǒng)、數(shù)據(jù)處理過程以及數(shù)據(jù)顯示子系統(tǒng)和報 警電路的設(shè)計方法和過程。系統(tǒng)對于采樣地點超出規(guī)定的 酒精濃度時二極管 報警 電路 提醒監(jiān)測人員。同時，操作人員對于具體報警點的上限值可以通過 單片機(jī)編程 進(jìn)行設(shè)置。 關(guān)鍵詞 ： 酒精濃度傳感器（ MQ3）； MCU； A/D 轉(zhuǎn)換器 ； 軟件設(shè)計；硬件設(shè)計 桂林電子科技大學(xué)畢業(yè)設(shè)計（論文）報告紙 Abstract Since 2021, with China39。s rapid economic development and the rapid increase people39。s living standard, China has gradually stepped into car society, drink driving accident caused by more and more impact on society is also growing, Alcohol is being more and more brutal killers. According to statistics, the worldwide number of people killed in road accidents every year on more than 60 million people, left with permanent disability of 400 million or more, usually the injured were numerous. In many countries, traffic accidents have bee the first cause of accidental deaths. In addition, the economic losses caused by the accident is quite amazing. Accident investigation, according to statistics, about 50% 60% of car accidents and alcoholrelated. China’s Ministry of Public Security in August 2021, around the country to strengthen efforts to investigate and deal with drink driving, to reduce the drink driving accident caused by the vicious. To investigate the human body involving the detection of alcohol and use of equipment to detect problems. In this paper, design a public place for the detection and limit alarm functions with an alcohol concentration of intelligent tester. This design,based on STC89C51 microcontroller and MQ3 alcohol concentration sensor. System sensor output 4 ~ 20mA standard signal through AD0832 core A / D converter circuit, after conditioning, data processing by the MCU, the final alcohol concentration value from the LCD display. This paper describes the data acquisition subsystem, data processing and data display subsystem and alarm circuit design methods and processes. System requirements for the sampling sites exceeding the alcohol concentration diode reminder alarm circuit monitors. Meanwhile, the operator specific alarm point for the upper limit set by MCU programming. Alcohol tester will bring a driving signal prior to a safe Key words:Alcohol concentration sensor (MQ3)。 STC85C52 MUC。 A / D converter。 Software design。Hardware design 桂林電子科技大學(xué)畢業(yè)設(shè)計（論文）報告紙 目 錄 引言 ......................................................... 1 1. 緒論 ..................................................... 2 酒精濃度檢測儀開發(fā) 背景 .............................................................................................. 2 酒精濃度檢測儀的發(fā)展 .................................................................................................. 2 酒精濃度檢測儀設(shè)計內(nèi)容 .............................................................................................. 2 2. 方案器件簡介 .............................................. 3 MCU 選擇的簡介 ............................................................................................................. 3 數(shù)模轉(zhuǎn)換器的簡介 .......................................................................................................... 5 時鐘芯片的簡介 .............................................................................................................. 7 液晶顯示器的簡介 .......................................................................................................... 8 3 總體 方案設(shè)計 .............................................. 9 STC89C52 單片機(jī) ............................................................................................................ 9 ADC0832 數(shù)模轉(zhuǎn)換 ....................................................................................................... 10 AT24C02 存儲器 ............................................................................................................ 10 LCD1602 液晶顯示 ........................................................................................................ 10 編譯軟件介紹 ................................................................................................................ 12 4 硬件設(shè)計 ................................................. 13 最小系統(tǒng)的實現(xiàn) ............................................................................................................ 13 數(shù)據(jù)采集設(shè)計 ................................................................................................................ 15 A/D 轉(zhuǎn)換設(shè)計 ................................................................................................................. 16 按鍵設(shè)計 ........................................................................................................................ 16 外圍擴(kuò)充存儲器電路 .................................................................................................... 17 時鐘芯片電路 ................................................................................................................ 18 LCD1602 液晶顯示設(shè)計 ................................................................................................ 19 報警設(shè)計 ........................................................................................................................ 20 電源電路設(shè)計 ................................................................................................................ 21 5. 軟件設(shè)計 ................................................ 22 編譯語言的選擇 ............................................................................................................ 22 主程序模塊 ................