3、决酒后驾车事故和特殊场合酒精检测都可以使用。 关键词：气体传感器，模数转换，单片机I中文摘要Abstract Different concentrations of alcohol solution are detected and showed in the design. The design can be used to the detection of drunk driving through improvement. In this thesis, the concentration of alcohol can
4、 be measured and displayed by using the gas sensor based on SPCE061A MCU and MQ-3. At the same time the concentration is displayed by LED, and the system allow to alarm in the certain value. In the thesis Major researches are three points. (1) In the hardware, det
5、ecting the technology parameters MQ-3 gas sensor, and connecting it to a testing part of the alcohol gas concentration; Analog voltage signal amplification to drive light-emitting diode light to alarm; conversing the voltage signal through the A/D conversion at the
6、 control of the single-chip, obtaining the digital voltage signal; displaying the concentration in the digital tube display module.(2)In the Software, linear conversion between the concentration of the alcohol and the voltage and the digital display of the final c
7、oncentration value.(3) The designed sensor is calibrated. The design of gas sensor is responsive to the alcohol, can measure concentration in the effective range of its concentration. And in the low concentration of alcohol in the test the error is small with the m
8、aximum error 8.2%, meeting requirements of the design. The characteristics of the thesis are to determine the standard. The solutions and ver
