Abstract

This paper deals with a recovery method of a crack shape for preventive maintenance of power plant. In order to detect a crack and recover of its shape automatically, we develop a mobile inspection robot with ECT (Eddy Current Testing) sensor composed of a transmitter-receiver coil probe. ECT is a major technique for detection of surface and subsurface cracks found out in structures of the power plant. The robot detects a crack by ECT sensor signals, localizes the crack and recover its shape by rough and fine inspection mode. For showing the effectiveness of this method, we show a experimental results.

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