酒精浓度测试

I课程设计报告设计题目:酒精溶度测试仪智能酒精浓度检测仪的设计摘要：随着科技的进步，智能产品在社会生产和人们生活等方面扮演着越来越重要的角色。本文介绍的是一款智能酒精浓度检测仪的设计方案，以STC89C52单片机和酒精传感器为核心，具有声光报警和LCD显示功能。为了满足不同环境下的监测，可根据不同的环境设置不同的阀值，超过阀值即进行声光报警，提示危害。该设计方案的优点是硬件电路设计简单，软件功能采用C语言进行调试，方便灵活。而该仪器具有灵敏度高、工作性能好、低功耗、低成本，较高的性价比等优点。可用于交通检测、酒厂和食品工厂发酵监控等场所。关键词：智能；酒精浓度；检测仪；STC89C52单片机；阀值；C语言；交通检测IIDesignforIntelligentAlcoholConcentrationDetectorAbstract:Withtheprogressofscience,intelligentproductsgraduallyplayanimportantroleinmanyaspects,suchassocialproduce,people’sdailylife.Thispaperintroducesanintelligentalcoholconcentrationdetector,whichisbasedonSTC89C52single-chipmicrocomputerandalcoholsensor(transducer).Ithasseveralfunctions,includingdetectingalcoholconcentrationindifferentenvironment,givinganalarmwithvoiceandglowing,andLCDdisplay,exceptforthis,wecanalsosetthevalvenumberofalcoholconcentrationtomeetdifferentenvironment’sdetecting,namely,whenthedetectingnumoverthevalue,thedetectorcansuggestdanger.Theexcellencesofthisdesignprecept:easyhardwarecircuit,softwarefunctionadopttoClanguagetotest,whichisconvenientandflexible.what’smore,thedetectorwithhighdelicacy,lowenergyconsumptionandspending.Itcanbeusedintrafficdetect,winefactory,foodfactoryandsoon.Keywords:intelligent;alcoholconcentration;detector;STC89C52single-chipmicrocomputer;value；Clanguage;trafficdetectIII目录第1章绪论.........................................................................................................................11.1选题的依据和课题的意义.................................................................................11.2国内外研究概况..............................................................................................................11.3课题研究方法...................................................................................................................21.4设计构成及研究内容.....................................................................................................2第2章系统的工作原理与结构...........................................................................................32.1工作原理............................................................................................................................32.2结构框图............................................................................................................................42.3智能酒精浓度检测仪的整体结构特点.....................................................................4第3章检测仪的硬件设计....................................................................................................43.1单片机的选择...................................................................................................................43.2酒精浓度检测的设计.....................................................................................................63.2.1MQ-3气敏传感器的结构和外形..........................................................................73.2.2MQ-3灵敏度特性曲线............................................................................................83.2.3MQ-3的标准工作条件和环境条件.....................................................................83.2.4酒精浓度信号的采集...............................................................................................93.3模数转换电路的设计...................................................................................................10IV3.3.1ADC0809的特点....................................................................................................103.3.2模数转换电路.........................................................................................................103.4按键设定阈值及阈值存储电路的设计...................................................................113.5液晶接口电路的设计...................................................................................................113.6声光报警电路的设计...................................................................................................123.7单片机与PC机串口通讯...........................................................................................133.8晶振电路的设计............................................................................................................133.9复位电路的设计............................................................................................................143.10附加功能电路的设计.................................................................................................14第4章检测仪的整体原理图和实物图..........................................................................15第5章检测仪的软件实现...............................................................................................165.1A/D转换的软件实现....................................................................................................165.2阈值设定及显示的软件控制.....................................................................................175.3整体软件控制流程......................................................................................................18第6章检测仪的软件功能调试........................................................................................206.1按键修改酒精阈值程序...............................................................................................206.2模数转换测试..............................