数値モデルを援用した上水道管の漏水位置のガイド波検査の検討

抄録

In this study, we examine the time-reversal imaging for guided wave inspection in a water pipe. In general, the guided waves exhibit multimodal and dispersion characteristics. Time-reversal imaging is one of the promising methods because the dispersion characteristics can be taken into account automatically. Green’s function, required in the process of time-reversal imaging, is calculated using normal mode expansion method for guided waves. The normal-mode solutions are obtained from the result of the semi-analytical finite element method.