SEGMENTED MAGNETOSTRICTIVE PATCH ARRAY TRANSDUCER, A STRUCTURE DIAGNOSIS DEVICE HAVING THE TRANSDUCER AND A METHOD FOR OPERATING THE TRANSDUCER

摘要

PURPOSE: A segmented magnetostrictive patch array transducer, a structure diagnosis device having the transducer and a method for operating the transducer are provided to inspect more precise fault in a structure such as a rod or pipeline by generating strong shear wave.;CONSTITUTION: A segmented magnetostrictive patch array transducer(200) comprises magnetostrictive patches(201), insulators(203), meander coils(204) and magnets(206). The magnetostrictive patches are attached to the circumference of a rod member(202). The insulators are arranged on the respective magnetostrictive patches. Each of the meander coils has multiple coil lines which are extended in the circumferential direction of the rod member on each insulator, wherein electric currents of opposite flow directions flow in the adjacent coil lines. The magnets form a magnetic field of the rod circumference direction on each magnetostrictive patch. When electric current is applied to one or more of the meander coils, the magnetostrictive patches positioned in the selected meander coils are deformed to generate shear wave in the rod member.;COPYRIGHT KIPO 2011