中文题目手持式酒精浓度测试仪的研制英文题目DevelopmentofHandheldAlcoholConcentrationDetector摘要本文介绍的是一种手持式酒精浓度测试仪的设计方案，采用高精度MQ-3酒精气体传感器对空气中的酒精浓度进行检测，利用宏晶公司高性能低成本单片机STC12C5A32AD对检测信号进行A/D转换和处理，具有声光报警和显示功能。为了适应不同环境下的监测，可依据不同的环境设定不同的阀值，超过阀值即进行声光报警，。该设计方案的优点是硬件电路设计简单，软件功能采用C语言进行编写，方便灵活。该仪器具有灵敏度高、工作性能好、功耗低、成本低，性价比高等优点。能用于交通检测、酒厂及食品工厂发酵监控等场所。关键词：酒精浓度测试STC12C5A32ADMQ-3阈值AbstractThispaperintroducesadesignofaninstrumentwhichisusedtodetecttheconcentrationofthealcohol.ThealcoholintheairisdetectedbyahighprecisionsensornamedMQ-3.MCUisSTC12C5A32ADproducedbySTCcompany.Theanalog-to-digitalconversionisintegratedintheMCU.BothsamplinganalogsignalandprocessingdatacanbeaccomplishedbythiskindofMCU.Asthepriceischeapandfunctionisfully,theMCUhasahighcostperformance.WecanreadtheconcentrationofthealcoholfromtheLCDoftheinstrument.Oncetheconcentrationishigherthanthethresholdlevel,theinstrumentwillalarmthroughvoiceandlight.Thethresholdcanbesetaccordingtothecircumstance.Thedesignisconvenientandflexible.BecausethecircuitissampleandtheprogramiswritteninClanguage.Theinstrumenthastheadvantagesofhighsensitivity,goodworkingperformance,lowpowerconsumption,highperformancepriceratio.Itcanbeusedintrafficdetection,wineries,foodfactoriesandotherplaces.Keywords:AlcoholSTC12C5A32ADMQ-3Threshold目录第1章绪论............................................11.1选题的依据及课题的意义..........................11.2国内外研究概况..................................11.3课题研究方法....................................31.4设计构成及研究内容..............................3第2章系统的工作原理与结构............................52.1工作原理.......................................52.2智能酒精浓度检测仪的整体结构特点................52.3结构框图.......................................6第3章检测仪的硬件设计................................73.1单片机的选择....................................73.2传感器模块的设计................................83.2.1MQ-3气敏传感器的结构和外形...............93.2.2MQ-3灵敏度特性曲线.....................103.2.3MQ-3的标准工作条件和环境条件.............103.2.4酒精浓度信号的采集.......................113.3A/D转换模块...................................123.4按键设定阈值及阈值存储模块....................133.4.1按键电路的设计...........................133.4.2阈值存储电路设计.........................143.5液晶显示模块..................................153.6声光报警模块..................................163.7供电及程序下载电路.............................17第4章酒精浓度测试仪的软件设计......................184.1液晶显示程序设计...............................184.2A/D转换程序设计...............................194.3报警程序设计..................................194.4整体软件控制流程...............................20第5章测试仪的调试及使用.............................215.1系统稳定性测试.................................215.2传感器的定标...................................215.3酒精浓度测试仪的使用方法及测试结果.............24结论..................................................25参考文献..............................................26致谢..................................................27附录..............
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