Design and Performance Analysis of a Mining Wireless Sensor Node for Disaster–Resistance

Wireless sensor networks are often used to monitor environmental information underground in coal mines, but gas/thermal disasters can easily damage wireless sensor nodes, making them ineffective. To solve the problems of poor adaptability and short survival time of traditional wireless sensor nodes in coal mine disaster environments, this paper designs a mining disaster-resistant variable sensor node with a secondary protection structure. The dynamic and thermodynamic performance of the node in gas/thermodynamic disaster environments was analyzed through simulation, and based on this, a physical node was developed and communication experiments were conducted. The research results indicate that when a gas/thermodynamic disaster occurs and the node interacts with rocks and shock waves in two main postures, it benefits from the first layer of protective shell (P1 shell) and the buffering and damping effects of rubber shock absorbers. The second layer of protective shell (P2 shell) and internal circuit board are not damaged; The node had good heat dissipation before the disaster; After the disaster, the node still has at least 1632s of effective working time within a range of 0-250m from the 9.5%, 200m ³ gas explosion source. The proposed mining disaster-resistant sensor nodes can provide conditional support for the construction of post-disaster emergency rescue information systems.