Development of an electromagnetic acoustic transducer for Lamb wave with magnetic field concentrator

The Proceedings of Mechanical Engineering Congress Japan ◽

10.1299/jsmemecj.2020.j04110 ◽

2020 ◽

Vol 2020 (0) ◽

pp. J04110

Author(s):

Zhanghan ZHAO ◽

Riichi MURAYAMA

Keyword(s):

Magnetic Field ◽

Lamb Wave ◽

Electromagnetic Acoustic Transducer ◽

Acoustic Transducer ◽

Field Concentrator

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Conventional electromagnetic acoustic transducer development for optimum Lamb wave modes

Ultrasonics ◽

10.1016/s0041-624x(02)00164-6 ◽

2002 ◽

Vol 40 (1-8) ◽

pp. 491-495 ◽

Author(s):

Riichi Murayama ◽

Koichi Mizutani

Keyword(s):

Lamb Wave ◽

Electromagnetic Acoustic Transducer ◽

Acoustic Transducer ◽

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Lamb wave signal selective enhancement by an improved design of meander-coil electromagnetic acoustic transducer

Chinese Physics B ◽

10.1088/1674-1056/27/8/084301 ◽

2018 ◽

Vol 27 (8) ◽

pp. 084301

Author(s):

Wen-Xiu Sun ◽

Guo-Qiang Liu ◽

Hui Xia ◽

Zheng-Wu Xia

Keyword(s):

Lamb Wave ◽

Electromagnetic Acoustic Transducer ◽

Wave Signal ◽

Acoustic Transducer ◽

Improved Design ◽

Selective Enhancement

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Development of a Non-Contact Stress Measurement System During Tensile Testing Using the Electromagnetic Acoustic Transducer for a Lamb Wave

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A ◽

10.1299/kikaia.72.602 ◽

2006 ◽

Vol 72 (717) ◽

pp. 602-607 ◽

Author(s):

Riichi MURAYAMA ◽

Kazuhiro MISUMI

Keyword(s):

Contact Stress ◽

Measurement System ◽

Lamb Wave ◽

Tensile Testing ◽

Stress Measurement ◽

Electromagnetic Acoustic Transducer ◽

Acoustic Transducer

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Study of magnetic pole materials for static magnetic field and dynamic magnetic field that compose an electromagnetic acoustic transducer for Lamb waves using the magnetostriction effect

Sensors and Actuators A Physical ◽

10.1016/j.sna.2021.113294 ◽

2021 ◽

pp. 113294

Author(s):

Riichi Murayama ◽

Yuta Akizuki

Keyword(s):

Magnetic Field ◽

Static Magnetic Field ◽

Magnetic Pole ◽

Electromagnetic Acoustic Transducer ◽

Acoustic Transducer ◽

Dynamic Magnetic Field

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Design of Electromagnetic Acoustic Transducer for Helical Lamb Wave With Concentrated Beam

IEEE Sensors Journal ◽

10.1109/jsen.2020.2976512 ◽

2020 ◽

Vol 20 (12) ◽

pp. 6305-6313 ◽

Author(s):

Zhe Wang ◽

Songling Huang ◽

Shen Wang ◽

Qing Wang ◽

Wei Zhao

Keyword(s):

Lamb Wave ◽

Electromagnetic Acoustic Transducer ◽

Acoustic Transducer

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Development of a non-contact stress measurement system during tensile testing using the electromagnetic acoustic transducer for a Lamb wave

NDT & E International ◽

10.1016/j.ndteint.2005.08.009 ◽

2006 ◽

Vol 39 (4) ◽

pp. 299-303 ◽

Author(s):

Riichi Murayam ◽

Kazuhiro Misumi

Keyword(s):

Contact Stress ◽

Measurement System ◽

Lamb Wave ◽

Tensile Testing ◽

Stress Measurement ◽

Electromagnetic Acoustic Transducer ◽

Acoustic Transducer

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Study of driving mechanism on electromagnetic acoustic transducer for Lamb wave using magnetostrictive effect and application in drawability evaluation of thin steel sheets

Ultrasonics ◽

10.1016/s0041-624x(98)00032-8 ◽

1999 ◽

Vol 37 (1) ◽

pp. 31-38 ◽

Author(s):

Riichi Murayama

Keyword(s):

Lamb Wave ◽

Driving Mechanism ◽

Electromagnetic Acoustic Transducer ◽

Steel Sheets ◽

Acoustic Transducer ◽

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Development of an ultrasonic inspection robot using an electromagnetic acoustic transducer for a Lamb wave and an SH-plate wave

Ultrasonics ◽

10.1016/j.ultras.2004.01.059 ◽

2004 ◽

Vol 42 (1-9) ◽

pp. 825-829 ◽

Author(s):

Riichi Murayama ◽

Shunnichi Makiyama ◽

Mitutoshi Kodama ◽

Yasutoshi Taniguchi

Keyword(s):

Lamb Wave ◽

Ultrasonic Inspection ◽

Electromagnetic Acoustic Transducer ◽

Inspection Robot ◽

Acoustic Transducer

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OS02W0013 A functional electromagnetic acoustic transducer for optimum Lamb wave modes with multi-wavelengths

The Abstracts of ATEM International Conference on Advanced Technology in Experimental Mechanics Asian Conference on Experimental Mechanics ◽

10.1299/jsmeatem.2003.2._os02w0013 ◽

2003 ◽

Vol 2003.2 (0) ◽

pp. _OS02W0013-_OS02W0013

Author(s):

Riichi Murayama ◽

Koichi Mizutani

Keyword(s):

Lamb Wave ◽

Electromagnetic Acoustic Transducer ◽

Acoustic Transducer ◽

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Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic Transducers

Applied Sciences ◽

10.3390/app10103491 ◽

2020 ◽

Vol 10 (10) ◽

pp. 3491 ◽

Author(s):

Yinghong Zhang ◽

Zhenghua Qian ◽

Bin Wang

Keyword(s):

Magnetic Field ◽

Lamb Wave ◽

Single Mode ◽

Plate Surface ◽

Electromagnetic Acoustic Transducer ◽

Bias Magnetic Field ◽

Low Frequencies ◽

Aluminum Plates ◽

The multimode and dispersion characteristics of Lamb waves make them difficult to apply to nondestructive evaluation. This paper presents a paired configuration of a meander-line coil electromagnetic acoustic transducer (EMAT) to generate a single-mode symmetric and antisymmetric Lamb wave in aluminum plates. In the paired structure, the bias magnetic field of the EMAT that generates symmetric mode Lamb waves is perpendicular to the plate surface, while the bias magnetic field of the EMAT that generates antisymmetric Lamb waves is parallel to the plate surface. The symmetric and antisymmetric exciting forces generated by these two EMATs are consistent with the dispersion equations of single symmetric and antisymmetric Lamb wave modes, respectively. The numerical simulations and experiments verified that the presented paired configurations of meander-line coil EMATs can effectively control the generation of single-mode Lamb waves at low frequencies.

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