本科毕业设计--基于单片机的酒精浓度检测系统.doc

摘要随着经济的快速发展，私家车数量增长迅速，但酒后驾驶、醉酒驾驶导致的交通事故比例在不断增加，给人民的生命财产造成巨大的损失。为了预防和减少交通事故的发生，设计了一种基于单片机的酒精浓度检测系统，本设计采用MQ-3气敏传感器采集气体相关数据，经过酒精浓度传感器模块进行调制和数据转化处理，最后将数据传送给单片机进行A/D转换和执行相应的功能。具有液晶实时显示气体中酒精浓度，通过按键进行阀值设定，超过设定的阀值会发光报警等功能。关键词：单片机；酒精浓度检测系统；气敏传感器AbstractWiththerapideconomicdevelopment,thenumberofprivatecarsisgrowingrapidly,buttheproportionoftrafficaccidentsofdrunkdriving,drunkdrivingcauseisincreasing,causinghugelossestothelivesandpropertyofthepeople.Inordertopreventandreducetheoccurrenceoftrafficaccidents,designedakindofalcoholconcentrationdetectionsystembasedonsinglechip,usingtherelevantdataofMQ-3gassensorscollectgasinthisdesign,modulationanddataconversiontreatmentafteralcoholconcentrationsensormodule,thedataistransmittedtotheMCUA/Dconversionandexecutesthecorrespondingfunction.Aliquidcrystaldisplaythealcoholconcentrationinair,forthresholdsetbythekey,morethanthesetthresholdvaluewillbeluminousalarmfunction.Keywords:singlechipmicrocomputer;alcoholconcentrationdetectionsystem;gassensor目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc356200548"第一章前言PAGEREF_Toc356200548\h1HYPERLINK\l"_Toc356200549"1.1概述PAGEREF_Toc356200549\h1HYPERLINK\l"_Toc356200550"2.1总体方案设计PAGEREF_Toc356200550\h2HYPERLINK\l"_Toc356200551"2.2单片机系统总体设计PAGEREF_Toc356200551\h2HYPERLINK\l"_Toc356200552"2.3芯片简介PAGEREF_Toc356200552\h3HYPERLINK\l"_Toc356200553"2.3.1STC12C5A16AD单片机PAGEREF_Toc356200553\h3HYPERLINK\l"_Toc356200554"2.3.2MQ-3酒精传感器PAGEREF_Toc356200554\h5HYPERLINK\l"_Toc356200555"2.3.3EEPROM-24C02阀值存储芯片PAGEREF_Toc356200555\h9HYPERLINK\l"_Toc356200556"2.3.4LCD1602显示模块PAGEREF_Toc356200556\h12HYPERLINK\l"_Toc356200557"第三章硬件电路设计PAGEREF_Toc356200557\h16HYPERLINK\l"_Toc356200558"3.1主程序/CPU模块PAGEREF_Toc356200558\h16HYPERLINK\l"_Toc356200559"3.2AT24C02阀值存储模块PAGEREF_Toc356200559\h16HYPERLINK\l"_Toc356200560"3.3MQ-3传感器调理电路PAGEREF_Toc356200560\h17HYPERLINK\l"_Toc356200561"3.4LCD液晶显示模块PAGEREF_Toc356200561\h18HYPERLINK\l"_Toc356200562"3.5按键单元设计PAGER