我国各地时常发生洗澡而导致煤气中毒的事件,为了防止悲剧再度发生,其人们开发了一套新型家庭浴室煤气报警与自救系统。该系统以半导体传感器MQ7为核心,煤气浓度达到危险值后通过直流电动机来关闭煤气阀门,启动排气扇,发出警报来达到报警与自救。整套系统造价便宜,适合大规模推广。 In our country, taking frequent bathing and gas poisoning incidents, in order to prevent the recurrence of tragedies, people have developed a new family of bathroom gas alarm and self-help system. The system uses semiconductor sensor MQ7 as the core, the gas concentration reaches a dangerous value after the gas through the DC motor to close the gas valve, start the exhaust fan, alarm to achieve the alarm and self-help. The whole system is cheaper and suitable for large-scale promotion.