MULTIPLE HELICAL COILS, TRANSMISSION EMAT SYSTEM AND RECEIVING EMAT SYSTEM USING SAME, AND TRANSMITTING/RECEIVING EMAT SYSTEM

WIPO Patent Application WO/2010/137764

A1

The present invention provides a multi-helical coil which is formed by winding the conducting wire in the helical type and formed by serially connecting m helical coils having both terminals corresponding to the start and the end of the conducting wire, and which has one terminal of a first helical coil and the other terminal of an m-th helical coil as both final terminals among the m helical coils. According to the provided multi-helical coil, unlike a conventional meander line coil, the number of coil legs and the wound number thereof can be variously changed, and thus the design and the use of an optimal coil for the EMAT application are possible and the ultrasonic transmitting/receiving efficiency can be improved. In addition, it is possible to implement a transmission EMAT system, a receiving EMAT system, and a transmitting/receiving EMAT system which have superior ultrasonic transmitting/receiving efficiency due to the employment of the multi-helical coil.

JPH04328461	METHOD OF DETECTING DEFECT OF SURFACE OF SEMICONDUCTOR CERAMIC
JPS6086458	ULTRASONIC FLAW DETECTING METHOD OF NOZZLE PART

CHOI MYOUNG SEON (KR)
KIM JIN YOON (KR)

PCT/KR2009/003538

December 02, 2010

June 30, 2009

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UNIV YEUNGNAM IACF (KR)
DIGITAL ULTRASONICS CO LTD (KR)
CHOI MYOUNG SEON (KR)
KIM JIN YOON (KR)

G01N29/04

JPS59105304A	1984-06-18
JPH04103711U	1992-09-07
JPS61117210U	1986-07-24
KR100602994B1	2006-07-20
US6951133B2	2005-10-04

TAEBAEK INTELLECTUAL PROPERTY LAW FIRM (KR)
특허법인 태백 (KR)

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