Non-Destructive Inspection of Reinforced Concrete by Electromagnetic Wave (Radar) Based on a Signal Propagation Model

Abstract

Non-destructive inspection by the electromagnetic wave (Radar) conventionally makes use of the shaded image on the magnitude variation of the reflected waves, i.e., B-mode images, and the anomaly diagnosis has been qualitatively done based on inspector's eye. This yields the diagnosis of a low reliability and a low accuracy.
The paper proposes a diagnosis method of high reliability and high accuracy based on the received signal obtained as time-series one. The method compares the peak pattern of the received signal with the predicted one based on a signal propagation model and realizes a high reliable non-destructive inspection of reinforced concretes.