(毕业论文)便携式有毒气体检测仪---软件部分.doc

摘 要 随着经济和科学技术的快速发展,人们对生活质量的提高和生活环境的改善越来越重视,液化气、煤气进入家庭的使用为人们带来了方便,也改善了城市的环境,但同时也给人们带来了潜在的危险,其中一氧化碳是最主要的危险源。一氧化碳是一种无色无味同时这些气体燃料在使用中，若管道和阀门密封不好，它们泄露出去，轻者引起中毒，重者造成火灾，危及人们的生命财产。由于这些原因，对于气体的检测与控制就变得很重要了，研究各种气体的检测方法与气体传感器也随之成为一个重要课题。 本设计利用电化学式传感器，将置于测试环境中待测气体的浓度转换为模拟电压，再通过ADC0809将模拟电压转换为数字信号，送入单片机AT89C51中进行处理。对气体浓度进行实时了解，进行静态显示。通过设置报警值，用单片机控制发光二极管和音乐IC同时报警。 由于所设计的数字气体报警器采用单片机AT89C51，其价格便宜，性能稳定，易于产品化。以电化学式传感器和AT89C51 单片机为核心， 设计气体泄漏报警器，该报警器设计方法简单易行，使用效果良好。 关键词：一氧化碳；气体泄露报警器；AT89C51单片机；电化学式传感器Abstract With the rapid development of economy and the science technology， people become pay more and more attention to the quality of life and improving the environment ,and gas into the family the use of convenience for people , but also to improve the urban environment, but also to people with to the potential dangers, including the risk of carbon monoxide is the most important source. If not sealed pipes and valves , they leaked , light caused poisoning , caused by heavy fire , endangering peoples lives and property . For these reasons ,so it is very important for us to inspect and control these gases well. And it is obviously very important to study on the inspection methods and sensors of all kinds of gases. The design of the series of sensors, will be placed on the test environment measured the concentration of gas converted to analog voltage, and then through the ADC0809 will be converted to analog voltage digital signal, into the SCM AT89C51 in the process. To users of gas concentrations in real-time understanding, can be static display. By setting the alarm level, the MCU control LED and music IC alarm at the same time.SCM control use of technology, produced a program-controlled carbon monoxide alarm. As designed by the number of gas alarm using SCM AT89C51, it is cheap, stable performance, easy-production. Gases Sensor to gas sensors and AT89C51 microcontroller as the coredesign of gas leakage alarm, the alarm system design method is simple, use good effect. Keywords：CO;