酒精濃度檢測儀的設(shè)計(jì)

測控論文編號:CK128   論文字?jǐn)?shù):12127,頁數(shù):44

 目錄
摘要  I
Abstract  II
目錄  III
1 前言 1
2 總體方案設(shè)計(jì) 3
   2.1 系統(tǒng)總體結(jié)構(gòu) 3
   2.2 系統(tǒng)硬件結(jié)構(gòu) 4
 2.3 系統(tǒng)總體軟件流程 5
3 酒精濃度測試模塊設(shè)計(jì) 7
   3.1 STC89C52RC單片機(jī)介紹 7
   3.2 MQ3酒精氣敏傳感器介紹 9
 3.3 ADC0809模數(shù)轉(zhuǎn)換器介紹 12
4 外圍接口電路設(shè)計(jì) 16
   4.1顯示模塊電路 16
 4.2 鍵盤輸入模塊電路 18
 4.3 聲光報(bào)警模塊電路 20
     4.3.1 聲光報(bào)警模塊電路程序設(shè)計(jì) 21
 4.4 通信模塊電路 21
 4.4.3  Pc機(jī)與單片機(jī)的通信模塊電路圖 23
 4.5 5V直流電壓設(shè)計(jì) 23
5 硬件軟件的調(diào)試、測試分析 25
 5.1硬件的安裝與調(diào)試 25
 5.2軟件的編程與調(diào)試 25
6 結(jié)論 26
致謝 27
參考文獻(xiàn) 28
附錄1 系統(tǒng)總原理圖 29
附錄2 實(shí)物圖 30
附錄3 程序 31

摘  要

 本文介紹一種酒精濃度檢測儀的設(shè)計(jì)方案，以單片機(jī)和氣敏傳感器為核心，實(shí)現(xiàn)了不同環(huán)境下酒精濃度的檢測。本設(shè)計(jì)作品是基于STC89C52RC單片機(jī)，利用MQ3氣敏傳感器，ADC0809 A/D轉(zhuǎn)換器，實(shí)現(xiàn)空氣中酒精濃度測量，通過LED數(shù)碼管顯示。當(dāng)濃度超過設(shè)定的閾值時(shí)，觸動聲光報(bào)警裝置，實(shí)現(xiàn)濃度監(jiān)測報(bào)警功能。其可監(jiān)測出空氣環(huán)境中酒精濃度值，并根據(jù)不同的環(huán)境設(shè)定不同的閾值，對超過閾值的進(jìn)行聲光報(bào)警，來提示危害。本文主要介紹了酒精濃度檢測儀的整體結(jié)構(gòu)，系統(tǒng)硬件電路，軟件結(jié)構(gòu)。電路主要分為六個(gè)部分：酒精濃度測試模塊、單片機(jī)控制模塊、按鍵輸入模塊、LED數(shù)碼管顯示模塊、聲光報(bào)警模塊和通信模塊。
關(guān)鍵詞：STC89C52RC，酒精濃度檢測儀，MQ3氣敏傳感器，A/D轉(zhuǎn)換

Abstract
 
 This text introduces an alcohol concentration detector ,which is designed taken single chip  computer and gas sensor as kernel .The alcohol concentration can be measured in different  environment . The design is based on the STC89C52RC Single -Chip Computer, using MQ3 Gas Sensor and A/D Transformer to realize the alcohol concentration detection .It will be shown through the LED Nixie tube. When the alcohol concentration parameter preponderates over what we set, Single -Chip Computer will drive the alarm module , at the meantime the LED immediately shows the alcohol concentration.So it can measure the alcohol concentration.What’s more, it can remind us of danger.The valve value could be set according to the different environment . In this paper , the whole construct of the alcohol concentration detector is introduced ; the  system  hardware circuit is designed ; the software flowchart  is outlined. The System is made up of seven parts: alcohol concentration measurement module, A/D Transformer module,Single -Chip Computer control module, keyboard input module, LED display module, alarm module and communication module .
Keywords: ST89C52RC,alcohol concentration detector，MQ3 Gas Sensor,A/D Transformer