A remote mobile gas monitoring and power-off control system based on internet of things in underground coal mine

A Remote Mobile Gas Monitoring and Power-off Control System (RMMPCS-IoT) based on Internet of Things is proposed, in order to help avoid gas disasters or accidents in underground coal mines. The key techniques and scheme of RMMPCS-IoT are given and analyzed, such as methane sensor and system architecture, communication and anti-jamming techniques, frequency offset compensation and CRC error checking and correction algorithm. The experimental tests are done in the working face entrance in the Xinjing coal from Yangquan coal industry (Group) Co., Ltd. in China, and the results show that the system not only provides a disaster prevention paradigm by remote mobile gas monitoring, but also has superior performance in terms of real-time (15ms) and accurate (99.99%) data transmission in working face as compared to other traditional gas monitoring systems.