The event-driven wireless sensor networks of coal mine
Liu Xiaoyang, Qiao Zhi, Lv Hongjie · 2017
To solve the problem of high-energy-consumption of Wireless Sensor Network (WSN) nodes and short WSN lifetime, considering the practical underground environment of coal mine, this paper proposes a novel event-driven WSN in the coal mine system. The paper also discusses different working patterns of the proposed event-driven WSN, and switching methods between them. According to the safety regulation in coal mine industry, we designed thresholds of the event trigger and corresponding working status of the nodes, which can significantly reduce the energy consumption of WSN nodes under the premise of safety. And by taking advantage of the space characteristics of underground tunnel, a routing protocol of the proposed event-driven WSN of coal mine was designed in this paper, which improved the algorithm of selecting the optimal number of WSN cluster heads. Moreover, we designed a rapid extraction method of accident data as to the proposed WSN, which increases the reaction speed when accidents occurs. The simulation results show that the proposed event-driven WSN in the coal mine system has lower energy consumption and longer network lifetime than traditional WSNs.