Three-Dimensional DV-Hop Location Technology for Coal Mine Based on WSNs

Aiming at the problem that the 3D DV-Hop localization algorithm has great error in the location of coal mine roadway, an improved three-dimensional DV-Hop fixed node location method is proposed based on the relationship between the geometric model of coal mine roadway and the sensor node. Based on the traditional 3D DV-Hop calculation hops and the lack of distance between nodes, the difference method is used to correct the distance between unknown nodes and beacon nodes, so that the estimated distance is more accurate and further improve the positioning accuracy. The experimental results show that the improved DV-Hop localization algorithm has greatly improved the positioning accuracy and is suitable for coal mine location.