基才51单片机的酒精浓度检测仪的设计

为了能有效防患因驾驶员酒后驾车而造成的事故发生，设计一种以智能仪器能够监测驾驶员呼出气体酒精含量非常必要。本设计以51单片机和MQ-3气体传感器为核心，设计了系统硬件电路，阐述了各模块功能并着重研究了气体传感器的选择。该系统能提供检测、显示、报警等多种功能，具有成本低、体积小、智能化强的特点。

Design of the alcohol concentration detector based on 51 single-chip

In order to hedge against the accidents because of drunk driving effectively, The need to design an intelligent instruments to monitor the driver＇s exhaled breath alcohol content. The alcohol concentration detector is designed taken STC89C51 single-chip computer and MQ-3 gas sensor as kernel. The system hardware circuit is designed; the function of each model and how to select the gas sensor are discussed especially. It has the display, alarm and other features, and it has the high accuracy, low cost, small size, intelligent strong, user-friendly characteristics. The simulation result it has higher accuracy corn pared to other alcohol detection systems.