1、 基于单片机防酒后驾驶控制系统设计基于单片机防酒后驾驶控制系统设计 The Design Of Anti-drunk Driving Control System On Single Chip Microcomputer 20132013 年年 6 6 月月 I 摘摘 要要 近年来,随着我国汽车的普及,汽车的安全问题已经引起了我们的注意,根据最 新的数据显示,目前,酒后驾车成为车祸频发的主要原因,我国因酒后驾车而导致的 死亡人数平均每年以 7.3%的速度增长,酒后驾车轻则害人害己,重则车毁人亡。为 了防止酒后驾车, 设计一种智能电路来检测驾驶员体内的酒精含量并且能够及时切断 汽车电源是非常有必
2、要的。 该设计由 MQ-3 酒精传感器来测量饮酒后驾驶员体内的酒精浓度,通过 A/D0832 转换器转换成数字信号传入单片机, 最后由单片机通过对数字信号的处理来显示酒精 浓度。在超过阈值时,发出声光报警,并且通过控制继电器来切断汽车电源。软件方 面,各个子程序的功能相对独立,便于调试和修改。当驾驶员体内酒精浓度超标时, 该系统能够自动切断汽车启动系统电源,同时发出声光报警,并通过数码管实时显示 酒精浓度。 本系统选择AT89C51单片机、A/D0832转换器、MQ-3酒精传感器、数码管、LED、 蜂鸣器、继电器等元器件通过DXP来设计硬件系统电路图,使用keil uvision4完成软 件系
3、统的编程调试。 关键词:关键词: AT89C51 单片机;A/D0832 转换器;MQ-3 酒精传感器;智能电路;酒 后驾车; II ABSTRACT In recent years, with the popularity of cars in China, safety problem of cars has caused our attention. According to the latest data, driving after drinking has become the main reason of the car accident, the death that case
4、d by the car accident has been increased at the rate of 7.3%. Driving after drinking is so dangerous that it cause death or hurt . To avoid the driving after drinking, it is necessary to design a intelligent circuit to check the alcohol concentration and cut off the power of the car in time. The design uses the MQ-3 alcohol sensor to measure the alcohol concentration of the drivers body and send those signals to SCM by A/D0832 converter. In the last, the SCM process the digital signal to d