"基于单片机的酒精浓度监测仪设计及应用研究"

基于单片机的酒精浓度检测仪是一种具有检测及超限报警功能的智能测试仪，适用于公共场所的使用。该设计方案基于89C51单片机和MQ3酒精浓度传感器，通过A/D转换电路对传感器输出信号进行调理，然后通过单片机进行数据处理，并最终通过LCD显示酒精浓度值。这个设计的目的是让驾驶员在饮酒后知道何时可以安全地驾驶，这在现代生活中是非常实用的。经过大量的验证，基于单片机的酒精浓度监测仪比传统的机械检测仪或酒精计更灵敏、监测精度更高、准确方便、可靠性更好、扩展更简单、控制功能更强大。它还可以对超出阈值的情况进行声光报警，直观准确。因此，基于单片机的酒精浓度监测仪的研究具有一定的实用价值。 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 Abstract：The paper studies the design of an alcohol concentration tester with detection and overrun alarm functions for public places. This design scheme is based on the 89C51 single-chip microcomputer and the MQ3 alcohol concentration sensor. The sensor output signal is conditioned by an A/D conversion circuit, processed by the single-chip microcomputer, and ultimately displayed on the LCD screen. The purpose of this design is to let drivers know when it is safe to drive after drinking, which is very practical in modern life. After a large number of validations, the single-chip microcontroller-based alcohol concentration monitor is more sensitive, has higher monitoring accuracy, is more convenient and reliable, simpler to expand, and has more powerful control functions than traditional mechanical detectors or alcohol calculators. It can also provide audible and visual alarms for situations that exceed the threshold, intuitively and accurately. Therefore, the research on the single-chip microcontroller-based alcohol concentration monitor has certain practical value.