A wireless charging algorithm for rechargeable wireless sensor networks in coal mines faces

The working face is the most dangerous place of coal mines, and it difficult (even impossible) to replenish energy by replacing batteries sensor nodes in faces. This paper presents a wireless charging method for this scenario that composed two sub methods called mining maintaining charging, respectively. Mining provides opportunistic services during process cutting through airborne Mobile Chargers (MCs) installed on ends shearer portable MCs carried drivers. Maintaining radius when scraper conveyor repairmen hydraulic support check or repair equipment, with each repairman carrying one MC. Simulation results show both can give replenishment When power greater than equal 5.2 W, first row work sustainably. If requirements second are also met, cannot be less 12 W.