Experiments with autonomous mobile radios for wireless tethering in tunnels

Abstract

Tunnels are a challenging environment for radio communications. In this paper we consider the use of autonomous mobile radio nodes (AMRs) to provide wireless tethering between a base station and a leader in a tunnel exploration scenario. We propose a tethering algorithm for AMR motion control based on a consensus variable protocol. Using radio signal strength measurements, the AMRs autonomously space themselves so as to achieve equal radio distance between each entity in the chain from the base station to the leader. Experimental results show the feasibility of our ideas.

Development of remote controlled manipulation device for a conventional excavator without renovation

“…These systems are commonly made with their remote control enabled from their development stage. The concept that existing heavy equipment for excavation cannot be reused is applied to such remote-control systems [7][8][9][10][11][12][13][14][15]. This research proposes a system for maintaining existing work and, if necessary, a installable remote-control-operation system within a short time without renovating the existing excavator.…”