基于单片机的酒精浓度检测仪设计与应用研究

基于单片机的酒精浓度检测仪毕业设计论文.doc 本文研究设计了一种用于公共场所具有检测及超限报警功能的酒精浓度智能测试仪。该设计方案基于 89C51 单片机和 MQ3 酒精浓度传感器。系统通过 A/D 转换电路将传感器输出信号调理后，经由单片机进行数据处理，最后由 LCD 显示酒精浓度值。该设备可以让驾车的人们知道自己是否可以开车，极大地提高了现代生活的实用性。经过大量验证，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为灵敏，监测精度高，准确方便，可靠性好，扩展简单，控制功能强大。该设备可以对超出阀值的情况进行声光报警，具有直观准确的特点。因此，基于单片机的酒精浓度监测仪的研究具有一定的价值。 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 This paper studies has been designed for public inspection and overrun alarm function with the alcohol concentration intelligent tester. Its design scheme based on 89C51, MQ3 alcohol concentration sensor. The system adjusts the sensor output signal through an A/D conversion circuit, processes the data through the single-chip microcomputer, and finally displays the alcohol concentration value on the LCD. This device allows drivers to know whether they can drive, greatly improving the practicality of modern life. After extensive testing, the alcohol concentration monitor based on single-chip microcomputer is more sensitive, accurate, convenient, reliable, easy to expand, and has powerful control functions compared to traditional mechanical detectors or alcohol meters. It can provide audio and visual alarms for situations that exceed the threshold, making it intuitive and accurate. Therefore, the research on the alcohol concentration monitor based on a single-chip microcomputer has certain value. Keywords: alcohol concentration sensor, single-chip microcomputer, analog-to-digital conversion, hardware design, digital display.