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Proceedings Paper

Mode-selectable ultrasonic transducer for cylindrical ferromagnetic waveguides
Author(s): Youngkyu Kim; Hocheol Lee; Seung Hyun Cho; Yoon Young Kim
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Paper Abstract

Ultrasonic inspection techniques using magnetostrictive transducers have received much attention in recent years as non-contact, non-destructive means of inspecting ferromagnetic materials. By the selection of a desired mode and thus the rejection of the unwanted modes among propagating waves in a waveguide, different types of flaws existing in a cylindrical ferromagnetic waveguide can be effectively detected. However, desired mode selection methods have not been fully developed yet. The purpose of this research is to present a mangetostrictive sensor based technique for the selection of either the bending or longitudinal waves alone in a ferromagnetic waveguide. To achieve this goal, new bias magnet configurations, particularly for bending mode selection are suggested. Several experimental results are conducted to verify the effectiveness of the suggested magnetostrictive sensors.

Paper Details

Date Published: 22 July 2003
PDF: 10 pages
Proc. SPIE 5050, Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems, (22 July 2003); doi: 10.1117/12.484232
Show Author Affiliations
Youngkyu Kim, Seoul National Univ. (South Korea)
Hocheol Lee, Samsung Electro-Mechanics (South Korea)
Seung Hyun Cho, Seoul National Univ. (South Korea)
Yoon Young Kim, Seoul National Univ. (South Korea)

Published in SPIE Proceedings Vol. 5050:
Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems
Daniele Inaudi; Eric Udd, Editor(s)

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