Masashi Murata

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Integrated operations of a multi-robot rescue system are investigated. The system consists of a base station (BS) and autonomous mobile robots. A wireless ad hoc network connects all of them. Mobile robots coordinatedly explore a disaster area to detect victims and send their information to operators at the BS. Three related subjects are reviewed in this(More)
A coordination procedure is proposed for a multi-robot rescue system that performs real-time exploration over disaster areas. Real-time exploration means that every robot exploring the area always has a communication path to human operators standing by a monitor station and that the communication path is configured by ad hoc wireless networking. The(More)
We investigated a collaboration scheme for rescue robots for reliable and effective operation of rescue systems using robots. The investigation focused on the collaborative movement of robots to maintain their wireless network. We propose classifying the robots into search robots and relay robots and using a behavior algorithm for their collaborative(More)
The autonomous chain network formation by multi-robot rescue system is investigated. Chain networks connecting a base station and rescue robots are essential to reconnoiter distant spaces in disaster areas. The chains must be formed to assure communications among them and must be transformed if the target of exploration changes. These formations must be(More)
A victim detection system is proposed for rescue operations in urban disaster areas. This system consists of autonomous mobile robots and a stationary monitor station connected by a wireless ad hoc network with an active network operation. Robots are instructed to detect victims in a disaster area and send the information to the monitor station through the(More)
This paper investigates QoS routing in an ad hoc network applied to a multi-robot network system named the "victim detection system" proposed for detecting victims in urban disaster areas. For the purpose to secure the survivability of victims, a modified frame structure is examined in this paper based on the already proposed method: synchronized QoS(More)
In this paper, we describe an experimental speech translation system utilizing small, PC-based hardware with multi-modal user interface. Two major problems for people using an automatic speech translation device are speech recognition errors and language translation errors. In this paper we focus on developing techniques to overcome these problems. The(More)