| 摘要 |
An underground mine communication system using underground mesh nodes (4 and 5) connected by mesh communication paths (6) which are typically conventional wire line or line of sight wireless communication paths, is connected to a number of higher level receiver stations (7) in locations corresponding to the nodes (4) by way of through the ground wireless communication. The through the ground wireless communication may be implemented by way of magnetic loop antennae at corresponding locations (4) and (7) or by way of earth current antennae. The system provides numerous redundant pathways in the mesh, allowing communication to continue even when various mesh communication paths (6) are disrupted or destroyed by emergency situations. |
