一种基于单片机的防酒后驾驶自动控制系统，应用于酒精浓度的检测。该系统由酒精传感器、AD0832转换器、89S51单片机控制器、声光报警、LED显示以及继电器等构成。其设计方案基于AT89S51单片机，MQ3酒精浓度传感器。-A microcontroller-based anti-drink driving system of automatic control, applied to the detection of alcohol concentration. The system consists of alcohol sensors, the AD0832 converter, 89S51 micro-controller, sound and light alarm, LED display and relays, etc. constitute. Its design is based on AT89S51 microcontroller the, MQ3 alcohol concentration sensor.