Fecha de publicación: 13/11/2020 Fuente: Wipo "IOT" The invention discloses a fuel gas leakage alarm system based on NB-IoT. The system comprises a gas leakage detection module and an NB-IoT remote transmission module, wherein the gas leakage detectionmodule and the NB-IoT remote transmission module work independently in a split mode, the gas leakage module comprises a wireless transmitting module and a combustible gas alarm, the NB-IoT remote transmission module comprises a wireless receiving module, a main control module and an NB-IoT module, the gas leakage detection module and the NB-IoT remote transmission module communicate with each other through a low-power 2.4 G wireless mode, the gas leakage detection module is connected with a gas meter with a valve, the NB-IoT remote transmission module is responsible for data transmission withthe gas early warning platform and is connected with exhaust equipment, and the gas early warning platform sends the alarm information to the mobile phone terminal after receiving an alarm signal. Compared with the prior art, the system is advantaged in that the split design is adopted, the gas leakage detection module is powered by a battery, a user can conveniently install the NB-IoT remote transmission module in an area meeting requirements, the NB-IoT remote transmission module is powered by mains supply, and the user can select a position with good NB-IoT signals at home and directly plug the NB-IoT signals into a mains supply socket.