J. Phys. IV France 08 (1998) Pr2-789-Pr2-792
A moving magnetic flux type sensor with shading coils for eddy current testingY. Tsuchida, T. Okamoto and M. Enokizono
Department of Electrical and Electronic Engineering, Faculty of Engineering, Oita University, 700 Dannoharu, Oita 870-11, Japan
This paper presents a moving magnetic flux type sensor with shading coils for eddy current testing. The eddy current testing is useful for detecting cracks and defects on the surface of the conductive materials. However, it is much difficult to detect them on the reverse side surface otherwise the cracks and defects occur on this surface. Therefore we have developed a new sensor for detecting cracks and defects on the reverse side surface. This sensor consists of shading coils which can yield the moving magnetic field, pick-uap coils and an exciting coil. In this paper, the results measured by this new sensor are shown and the availability of our new sensors is discussed.
© EDP Sciences 1998