Patent ID: 7295001

Claim:
A magnetostrictive transducer having a ferromagnetic patch that attaches to a predetermined position of a subject, a cylindrical insulator installed around the periphery of the ferromagnetic patch, and a coil wound around the cylindrical surface of the insulator, wherein the ferromagnetic patch comprises: a strip unit attached to the subject in an inclined manner with respect to an axis of the subject and transferring the torsional wave to the subject; and tail units formed at opposite ends of the strip unit and concentrating a magnetic flux on the strip unit when current is applied to the coil, wherein the ferromagnetic patch generates a torsional wave based on a magnetostrictive effect in the subject when current is applied to the coil, and wherein the ferromagnetic patch further comprises a connection unit that is connected to the strip unit and the tail unit and is formed in a direction parallel with the axis of the subject.