1、摘摘 要要 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。可燃气体探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。为了防止这类事故的发生， 装设可燃气体监测报警器是非常必要的，可以及时发现事故隐患，及早 采取补救措施。 鉴于单片机 AT89C51 具有高集成度等优点，开发设计了一种基于 AT89C51 的可燃气体报警器， 为了提高系统的灵敏度和
2、准确性，系统采用 了一种十分稳定的传感器 MQ-2。该报警器对可燃气体进行实时控制，当 可燃气体的浓度超过允许值时，控制电路进行报警,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. 本设计的可燃性气体报警、控制器可以检测空气中以烷类及一氧化 碳气体为主的多种可燃性气体的浓度，实时显示浓度值，当达到预先设 定的上限报警设定值时，发出声音报警和控制信号，以提示操作人员采 取安全对策或自动控制相关安全装置。该报警器可以实时、准确检测可 燃性气体，并且可以长时间可靠无误的报警，具有很广泛的应用前景。 关键词：关键词：报警器；传感器；单片机；蜂鸣器 AbstractAbstract With
3、the city gas, natural gas utilities and the chemical industry is developing rapidly, 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 a
4、nd other major incidents. People of the importance of safety in production and the production of technical means to continuously improve, the combustible gas alarm monitoring is widely used in these areas. Combustible gas alarm monitoring is the prevention of explosive gas in the production and use
5、of the leakage occurred during the alarm. In order to prevent the occurrence of such incidents, the installation of combustible gas alarm monitoring is essential to the timely detection of potential causes of accidents and take remedial measures. Carbon monoxide alarm is designed based on AT89C51 wi
6、th a high level of integration. In order to improve sensitivity and accuracy ,the electrochemical sensor is used. The carbon monoxide alarm is monitored on for real - time, when permitted vale of the concentration of carbon monoxide is exceeded,the control circuit will alarm, and it is program - controlled through external row fans and solenoid valve with .that this method is designed to monitor combustible gas alarm has a stable performance, accurate measurement. Combustible gas alarm instrum
