• Title/Summary/Keyword: Magnetostrictive patch

Search Result 33, Processing Time 0.022 seconds

Development and Application of Phased Array System for Defect Imaging in Plate-like Structures (평판 구조물의 영상화를 위한 위상 배열 시스템 개발 및 응용)

  • Lee, Joo Kyung;Kwon, Young Eui;Lee, Heung Son;Seung, Hong Min;Kim, Ki Yeon;Lee, Jun Kyu;Kim, Hoe Woong;Lee, Ho Cheol;Kim, Yoon Young
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.24 no.2
    • /
    • pp.123-130
    • /
    • 2014

  • An ultrasonic magnetostrictive transducer-based phased-array system for imaging defects in plate structures is newly proposed. In that most ultrasonic phased array systems rely on piezoelectric transducers or electromagnetic acoustic transducers, this system has its own unique feature of employing magnetostrictive transducers. Interest in using a phased array system using magnetostrictive transducers has been recently reported for pipe inspection but no such system has been developed for plate inspection. In this investigation, we aim to propose a phased array system using OL-MPTs (Omnidirectional Lamb wave Magnetostrictive Patch Transducers) for plate inspection. The developed system consists of a multi-channel function generator, power amplifiers, preamplifiers and a data acquisition unit. In the process of its development, each of the units must be checked and in doing so, we suggest types of ultrasonic wave experiments that should be carried out. Finally, the phased system using a transducer array composed of eight OL-MPTs is newly configured and is applied for actual crack detection experiments.

  • https://doi.org/10.5050/KSNVE.2013.24.2.123 인용 PDF KSCI KPUBS HTML

Nondestructive Evaluation of plate structures using the Ultrasonic Transducer OPMT (OPMT 초음파 트랜스듀서를 이용한 평판구조 이상진단)

  • Kim, Yoon-Young;Cho, Seung-Hyun;Lee, Ju-Seung;Sun, Kyung-Ho
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2004.11a
    • /
    • pp.423-427
    • /
    • 2004

  • In this work, we propose a new ultrasonic damage inspection method in plate structures. The proposed method employs an OPMT (Orientation-adjustable Patch-type Magnetostrictive Transducer) in order to make the ultrasonic waves focused on the specific target point. For experiments, virtual grid points were set up at every 50 mm in an aluminum plate and two OPMTs were used for inspection. If there exists a crack in a plate, the reflected Lamb wave from the crack is measured in addition to the direct waves from the transmitting transducer to the receiving transducer.

  • PDF