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这里设计了一种结构简单且具有较强实用意义的家庭天然气管道泄漏检测系统。该系统基于AT82S52单片机收集信号，并针对天然气的特征进行各类气敏传感器的对比选择。使用MQ?2型半导体气敏传感器，用C语言进行程序编程，最终制作出的监测系统实物可以通过按键设定报警浓度上限。当空气中天然气的浓度超过预定值时会出现声光双重报警，且制作成本较低。“,”A detection system for household natural gas pipeline leak was designed ,which has simple structure and ob?servable practicability. This system is based on the AT82S52 to collect signals. Several gas sensitive sensors were compared for a the most proper one according to the characteristics of natural gas. MQ?2 semiconductor gas sensitive sensor was used to detect natural gas pipeline leakage. System software is programmed by C language. The upper limit of alarm concentration can be set by a simple keyboard. Both sound and light alarm appears by the system when the gas concentration in the air is beyond the preset value. The cost to make the system is low.