Fig. 1
From: Research on positioning method of industrial wireless sensor networks
Anchor box node distribution. The mine has a narrow roadway, roadway width w, A and B two anchor nodes, the node communication radius r, anchor nodes separated by cloth on the side of the roadway d, d less than 2r that any two anchors inter-node communication radius overlap; the anchor box width is limited to the roadway width, length is limited to the roadway width