"基于单片机的酒精浓度智能测试仪设计及实现"

Based on the content from the "基于单片机的酒精浓度检测仪-学位论文.doc," this paper discusses the research and design of an intelligent alcohol concentration tester for public places. The device is equipped with detection and over-limit alarm functions, and is based on the 89C51 single-chip microcomputer and MQ3 alcohol concentration sensor. The system processes the sensor output signal through an A/D conversion circuit, and then the microcontroller processes the data, displaying the alcohol concentration value on an LCD screen. This technology is highly practical in modern life, particularly for drivers who need to know when it is safe to operate a vehicle. Extensive validation has been conducted, and the alcohol concentration tester based on a single-chip microcontroller has been found to be more sensitive, precise, convenient, reliable, and easy to expand compared to traditional mechanical detectors or alcohol meters. It also has powerful control functions and provides intuitive and accurate sound and light alarms for values that exceed the threshold. Therefore, the research on the alcohol concentration tester based on a single-chip microcontroller holds significant value. Key words include alcohol concentration sensor, single-chip microcomputer, analog-to-digital conversion, hardware design, and digital display. In summation, this paper provides a comprehensive overview of the research and design of an alcohol concentration tester based on a single-chip microcontroller. It outlines the system's components, operation, and the advantages it offers over traditional alcohol detectors. The device's ability to provide accurate and reliable measurements, as well as its intuitive alarm system, make it highly valuable for public use, particularly in the context of promoting safe driving practices.