This paper is concerned with quantitative evaluation of corrosion shape on back surface of Stainless s amples by Electro Magnetic Acoustic Transducer (EMAT). First we summarize numerical studies of the qua ntitative nondestructive evaluation by EMAT. Secondly, a method for recovering corrosion shape is prop osed. Aspect ratio (corrosion height / corrosion radius) is important for recovery a corrosion shape....
英字タイトル:
Identification of Corrosion Shape by EMAT

This report is concerned with construction of an inspection robot system. The system is assumed to be composed of a set of nondestructive inspection devices and an autonomous moving robot. The inspection devices are assumed to be set over the target materials used in remote large artifacts while the robot is expected to acquire test data and to supply sufficient energies. This report is devoted to development of inspection device using electromagnetic acoustic transducer (EMAT). Guided wave inspection enabl...
英字タイトル:
Development of Remote Inspection Robot using Electromagnetic Acoustic Transducer

This paper is concerned with a computational method for evaluating a degradation level of magnetic materials. Applying current to a probe with magnetic yoke, the detecting signal can be measured by pick-up coil attached with the probe. An inspection model is described by a nonlinear Euler equation in two dimensions with the state dependent magnetic permeability. The nonlinear output l east square problem is formulated for identifying the material degradation parameter. Some numerical experiments are summar...
英字タイトル:
Nonlinear Electromagnetic Field Analysis and Its Application to Nondestructive Evaluation in Material Degradation of Steel Samples