单点可燃性气体监控系统的设计.doc

摘 要：随着城市煤气、天然气事业及化学工业的迅速发展，易燃、易爆的气体种类和应用范围在不断增加，这些易燃易爆气体在生产和使用过程中，一旦发生泄露将会引起中毒、火灾、爆炸等重大事故。在人们对安全生产的重视程度和生产技术手段不断提高的同时，可燃气体监测报警器正广泛地应用在这些领域中。可燃气体监测报警器是预防易燃易爆气体在生产和使用过程中发生泄露的报警装置。因此，可燃性气体报警器的研究是很有意义和必要的。课题主要阐述了可燃气体监测报警器的设计。报警器的总体工作流程是：A/D转换芯片将传感器送来的模拟量转化成数字量送给单片机，然后进行数字滤波，数据处理，将电压信号转化成为对应的浓度值。最后，将实际可燃气体浓度送液晶LCD12864显示，当有可燃气体浓度超出设定的限定值时，则单片机将驱动蜂鸣器实现报警功能。实验表明，课题设计的可燃气体监测报警器具有性能稳定，测量准确等优点，因此，是一种具有较好实用价值的气体监测装置。 关键词：报警器；STC89C52单片机；蜂鸣器 The Design of Single Point of Combustible Gas Monitor Alarm Apparatus Abstract: With the rapidly development of the city gas, natural gas utilities and the chemical industry, flammable, explosive gas type and range of applications is increasing, the flammable and explosive gases in the process of production and use, in the event of leakage will be caused by poisoning, fires, explosions and other major accidents. People of the importance of safety in production and the production of technical means to continuously improve, the combustible gas alarm monitoring are widely used in these areas. Combustible gas alarm monitoring is the prevention of explosive gas in the production and use of the leakage occurred during the alarm. So the design of combustible gas monitor alarm apparatus is necessary and takes remedial measures.The topic elaborated on combustible gas alarm monitoring software design. Alarm overall workflow is: A / D conversion chip will be sent to the analog sensors into digital to the microcontroller, and then proceed to digital filtering, data processing, the voltage signal into the corresponding concentration value. Finally, the actual concentration of combustible gases to send LCD12864, when the concentration of combustible gases in excess of the limit value set, then the realization of single-chip drive buzzer alarm function. The experimental results show that this method is designed to monitor combustible gas alarm has a stable performance, accurate measurement, therefore, is a good practical value of the gas monitoring dev