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Spiral Coil Magnetostrictive Strip Transducers for Long Range Ultrasonic Testing of Cylindrical Structures  

Heo, Won-Nyoung (Department of Physics, Yeungnam University)
Choi, Myoung-Seon (Department of Physics, Yeungnam University)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.28, no.5, 2008 , pp. 416-420 More about this Journal
Abstract
In EMAT field, spiral RF coils are much more widely used when compared with solenoid coils. In the field of the magnetostrictive strip transducers for long range ultrasonic testing of cylindrical structures, however, solenoid coils has been used. This seems to be attributed to the difficulty in fabricating low frequency (i.e., large size) spiral coils. In this paper, we describe a method for fabricating spiral coil magnetostrictive strip guided wave transducers from FFC (flexible flat cable). It is demonstrated through a comparison experiment that the spiral coil transducer has much superior performance (sensitivity, SNR, and guided wave direction control capability) than the previous transducer with solenoid coils.
Keywords
Long Range Ultrasonic Testing; Spiral Coil; Magnetostrictive Strip Transducer;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 H. Kwun, S. Y. Kim and G. Light, 'Long range guided wave inspection of structures using the magnetostrictive sensor,' J. Korean Soc. NDT. Vol. 21, No. 4, pp. 383-390, (2001)
2 M. G. Silk, Ultrasonic Transducers for Nondestructive Testing, Ch. 5, Adam Hilger, (1984)
3 http://www.dooyoun.com
4 M. Hirao and H. Ogi, EMATs for Science and Industry, Ch. 2, Kluwer Academic, (2003)
5 H. Kwun, S. Y. Kim and M. S. Choi, 'Experimental comparison of analytical modeling of a guided wave interaction with a notch in a pipe,' J. Korean Phys. Soc. Vol. 45, No. 2, pp. 380-385, (2004)
6 S. J. Kim and M. S. Choi, 'Magnetic property effects of the strip on transducer sensitivity in a magnetostrictive strip type guided wave transducers,' J. Korean Soc. NDT. Vol. 28, No. 2, pp. 205-210, (2008)   과학기술학회마을
7 H. Kwun and C. M. Teller, 'Magnetostrictive generation and detection of longitudinal, torsional, and flexural waves in a steel rod,' Mat. Eval. Vol. 52, No. 4, pp. 503-507, (1994)
8 G. M. Light, H. Kwun, S. Y. Kim and R. L. Spinks, 'Method and apparatus for short term inspection or long term structural health monitoring,' U.S. Patent No. 6396262, (2002)
9 http://www.guided-ultrasonics.com
10 http://www.eunsung-ind.com
11 http://www.mkckorea.com
12 http://www.imperial.ac.uk/ndt
13 http://www.ndttech.swri.org
14 H. Kwun and A. E. Holt, 'Feasibility of under-lagging corrosion detection in steel pipe using the magnetostrictive sensor technique,' NDT&E International Vol. 28, Issue 4, pp. 211-214, (1995)   DOI   ScienceOn