Development of an electromagnetic acoustic transducer for Lamb wave with magnetic field concentrator

Abstract

When a Lamb wave electromagnetic transducer(EMAT) is used to detect different types of defects, any different types of electromagnetic induction coils and magnets are needed to change modes. This study is examined whether it is possible to improve the function of Lamb wave EMAT by combining the same Lamb wave EMAT and a magnetic field concentrator with a different structure.