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On March 11, 2011, a massive earthquake (Magnitude 9.0) and accompanying tsunami hit the Tohoku region of eastern Japan. Since then, the Fukushima Daiichi Nuclear Power Plants have been facing a crisis because of loss of all power resulting in meltdown accidents. Three buildings housing nuclear reactors were seriously damaged from hydrogen explosions and,(More)
Rapid information gathering during the initial stage of investigation is an important process in case of disasters. However this task could be very risky, or even impossible for human rescue crews, when the environment has contaminated by nuclear, biological, or chemical weapons. We developed the information gathering system using multiple mobile robots(More)
— Mobile robots may be able to aid rescue crews in dangerous environments during search and rescue missions after natural or man-made disasters. In 2006, we began a research project to realize mobile robots that can gather information rapidly at the first stage of a disaster. 3D mapping, which can be an important aid for rescue crews in strategizing rescue(More)
— The track mechanism has high mobility on irregular terrain, and is typically used as a locomotion mechanism for all-terrain robots. However, the track mechanism sometimes slips while traversing slopes comprising loose soil. Therefore, we developed a new locomotion mechanism, referred to as surface-contact-type locomotion, which has high mobility on weak(More)