Mai Endo

Design of a Tendon-Drive Manipulator for Positioning a Probe of a Cooperative Robot System for Fault Diagnosis of Solar Panels at Mega Solar Power Plant

In recent years, several large-scale solar power plants, called mega solar power plants, have been built at various locations. Inspection of a faulty solar panel is important for the maintenance of solar panels. However, previous methods of determining a fault in a solar panel required removal of panels from the solar power plant. In this paper, a cooperative robot system using wire-parallel mechanism is proposed for the realization of on-site inspection. Based on Vector-Closure and manipulability, the design of the system is described.

A nozzle position control for the road surface decontaminating System

The Great East Japan Earthquake that occurred on March 11, 2011 resulted in the explosion of the TEPCO Fukushima 1st Nuclear Power Plant and the global dispersion of a large quantity of radioactive substances. A high radiation dose was particularly recorded in Fukushima prefecture several weeks after the accident, although the level is presently sufficiently low. However, considering that the adverse effects of low but extended exposure to radiation are yet to be negated, there is the urgent need for further decontamination. In our study, we focused on the efficient decontamination of radioactive substances in residential areas, for which we propose a high-pressure water jet system for washing road surfaces. The system differs from conventional systems of its type that were initially designed for use in the immediate environment of the nuclear reactors of the TEPCO Fukushima 1st Nuclear Power Plant. The proposed system consists of multiple washing, transporter, and server robots. The washing robots decontaminate the road surface using high-pressure water jets and are transported between washed and unwashed areas by the transporter robots. The server robots supply the water used for washing and absorb the polluted water together with ground dust. In this paper, we describe the concept of the system and present the results of decontamination experiments. Particular attention is given to the washing robot and its mechanism and control method. The results of the integration of the washing robot in an experimental system confirmed the feasibility of the proposed system.

Road surface washing system for decontaminating radioactive substances.

The Great East Japan Earthquake that occurred on March 11, 2011 resulted in the explosion of the TEPCO Fukushima 1st Nuclear Power Plant and the global dispersion of a large quantity of radioactive substances. In our study, we focused on the efficient decontamination of radioactive substances in residential areas, for which we propose a high-pressure water jet system for washing road surfaces. The proposed system consists of multiple washing, transporter, and server robots. Particular attention is given to the washing robot and its mechanism and control method. The results of the integration of the washing robot in an experimental system confirmed the feasibility of the proposed system.