本课程的目的是研究了基于气体传感器和单片机的A/ D转换器，检测驾驶者的酒精浓度在呼出的空气，并拥有完善的空气酒精浓度监测器的光报警功能。它可以检测在空气环境醇的浓度，并设置不同的阈值取决于环境，超过声光报警以提示危害的阈值。-This course is designed to study a gas sensor and microcontroller A/D converter based, detect the driver s alcohol concentration in exhaled air, and has a sound and light alarm function of air alcohol concentration monitor. It can detect the concentration of alcohol in the air environment, and set different thresholds depending on the environment, to exceed the threshold of sound and light alarm to prompt hazards.