Abstract
The paper proposes non-destructive inspection methods using ultrasonic and electromagnetic wave radar. That is, it presents first, for ultrasonic sensor, two types of detection methods of a multi-reflective wave model method and a stationary wave model method. And, next an electromagnetic wave radar inspection method based on a signal propagaion model. All these methods are based on the physical model of the object and thus they guarantee a high reliable and high accurate defect's detection and measurement. In this respect, it entirely differs from the conventional methods based on the human's five senses.
