Considering the fact that most smoke alarm employs a wired signal transmission and the safety office can' t be informed directly, a GSM module-based smoke alarm system was proposed to send and receive information via SMS modules and to alarm remotely. The system can have gas density collected with MQ-2 sensor and data processed with STC89C52 MCU,as well as the smoke concentration displayed on LCD12864. While the threshold is exceeded, the alarm information can be sent to the target mobile phone via TC35 GSM module and to alarm via a voice module.%针对目前瓦斯报警信号传输大多是有线的形式,并且不能直接从现场通知安全部门的状况,提出了基于GSM模块的烟雾报警系统,利用短消息模块传送和接收信息,在全球范围内实现了报警信息的漫游,实现远程报警功能.该系统采用MQ-2传感器采集瓦斯浓度,经过主控模块STC89C58RD单片机进行数据处理,同时将烟雾浓度在LCD12864上显示,当超过阈值时则通过GSM模块TC35将报警信息发送给目标手机号码,然后通过语音模决发出报警提示.
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