3、采样地点超出规定的酒精浓度时二极管报警提醒。同时测试仪特定的上限报警点可以由单片机编程进行设置。大量的验证后，基于51单片机的酒精浓度检测仪比传统的酒精计或机械检测仪灵敏，高监测精度，可靠性好，准确方便，扩展简单，灵敏度高，控制功能强大。超过阈值的声光报警，直观和准确。因此，基于单片机的酒精浓度检测仪研究具有一定的价值。 关键词： 酒精浓度传感器 单片机 数模转换 硬件设计 数码管显示关键词：智能电动小车；STC89C52；传感器I金陵科技学院学士学位论文第1章绪论AbstractThis paper studies has be
4、en designed for public inspection and overrun alarm function with the alcohol concentration intelligent tester. Its design scheme based on 89C51, MQ3 alcohol concentration sensor. System will sensor output signal through the A/D circuit recuperation, data processing byMCU, f
5、inally by LCD display alcohol chroma value.Thispaperdescribesthedataacquisitionsubsystem,dataprocessinganddatadisplaysubsystemandalarmcircuitdesignmethodsandprocesses.Systemrequirementsforthesamplingsitesexceedingthealcoholconcentrationdiodereminderalarmcircuitmonitors.Meanw
6、hile,theoperatorspecificalarmpointfortheupperlimitsetbyMCUprogramming.Alcoholtesterwillbringadrivingsignalpriortoasafe.After a great deal of verification, based on SCM alcohol concentration monitor detector than traditional mechanical detector or alcohol plans, monitoring hi
7、gh precision, sensitivity, good dependability, precise convenient extended simple, control powerful functions. Beyond the value of acousto-optic alarm, intuitive accurate. So based on SCM alcohol concentration monitor research has certain value. . Keywords: Alcohol conc
