酒精浓度测试仪的设计[摘 要]：本研究设计的酒精浓度测试仪是一款实用性强、安全可靠的气体乙醇浓度检测工具，采用高精度 MQ-3 乙醇气体传感器对空气中的乙醇浓度进行检测，利用宏晶公司高性能低成本单片机 STC12C5A16AD 对检测信号进行 A/D 转换和处理，最后通过液晶屏显示输出。本研究设计的酒精浓度测试仪还具有醉酒阈值设定功能，可以根据法律法规或用户需要设定修改醉酒阈值，并进行保存。[关键词]：单片机 A/D 转换和处理 醉酒阈值 MQ-3 乙醇气体传感器Alcohol concentration test instrument Abstract ： This study design alcohol tester is a new practical, safe and reliable gas ethanol concentration testing tool, Adopting high precision MQ - 3 ethanol gas sensors to detect the concentration of ethanol in the air, the use of macro crystal company high performance low cost STC12C5A16AD microcontroller to detection signal A/D conversion and processing, finally through the LCD screen display output. This study design alcohol tester also has drunk threshold setting function, can according to laws and regulations or the user need to set modify drunk threshold, and save.Keywords：Scm A/D conversion and processing Drunk threshold MQ - 3 ethanol gas sensor目 录第一章 绪论.........................................................11.1 本课题的研究的背景以及现实意义...............................11.2 关于本课题的简介.............................................21.3 课题论述总体结构安排.........................................2第二章 硬件设计.....................................................32.1 设计框图.....................................................32.2 乙醇信号检测及调理电路.......................................32.3 单片机电路...................................................62.4 显示电路.....................................................82.5 阈值存储.....................................................92.6 供电及程序下载电路..........................................1...
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