Developing dual-surveillance based networks for intelligent tunnel management

Abstract

Although more than 100-kilometer-long tunnel structures are considered in many areas including the Taiwan Strait, the risk challenges of long tunnels, including sabotage / terrorism, need be concerned accordingly. Hence, establishing SCADA networks with distributed intelligence and real-time fault-tolerance mechanism is worthwhile for long tunnels. Besides, the dual-surveillance system can be featured with better functionality just as the human beings can have better vision by two eyes instead of by one in addition to node fault-tolerance. For professionals' interest, the features of the bipartite GHT network are proofed with graphs: GHT(m,n,0) / GHT(m,n,n/2) is 1-edge hamiltonian if n greater than or equal to.4, and GHT(m,n,0) / GHT(m,n,n/2) is 1p-hamiltonian if and only if either n greater than or equal to 6 or m = 2 and n greater than or equal to 4. Therefore, the proposed GHT-SCADA network prototypes can be dual-surveillance based, with optimal degree (3 connected links to a node) and have both nodes' and links' fault-tolerance as well as a mechanism supporting orderly inspection and maintenance. Such reliable SCADA networks are not only for preventing disasters, but also actively for best judgment and control of incidents in tunnels. (A) This paper was presented at Safety in the underground space - Proceedings of the ITA-AITES 2006 World Tunnel Congress and the 32nd ITA General Assembly, Seoul, Korea, 22-27 April 2006. For the covering abstract see ITRD E129148. Reprinted with permission from Elsevier.