Development of an Electromagnetic Acoustic Transducer that can Alternately Drive the Lamb Wave and Shear Horizontal Plate Wave
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概要
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The Lamb wave is often utilized for the inspection of thin metal plates using a wheel-type probe with piezoelectric oscillators is used as the sensor. The Lamb wave is too sensitive to the conditions of the surface, although it has a high ability for defect detection. On the other hand, a shear horizontal (SH) plate wave is not very sensitive to surface conditions, although it has a low ability for defect detection. They have different characteristics for defect detection. It may then be desirable if both ultrasonic waves could be used by the same transducer; however, it is difficult to generate both ultrasonic modes using a wheel-type transducer. We attempted to generate both ultrasonic modes using an electromagnetic acoustic transducer (EMAT). We then confirmed the basic structure and the fundamental drive conditions. We also observed that the basic characteristics for defect detection different between both ultrasonic modes.
- 2003-05-15
著者
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Murayama Riichi
Intelligent Mechanical Engineering Fukuoka Institute Of Technology
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Murayama Riichi
Intelligent Mechanical Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-Higashi, Higashi-Ku, Fukuoka 811-0295, Japan
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Hoshihara Horitugu
Intelligent Mechanical Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-Higashi, Higashi-Ku, Fukuoka 811-0295, Japan
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Fukushige Tomonori
Intelligent Mechanical Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-Higashi, Higashi-Ku, Fukuoka 811-0295, Japan
関連論文
- Development of an Electromagnetic Acoustic Transducer with Multi-Wavelength for Lamb Wave
- Nonlinear Ultrasonic Wave Detection by Electromagnetic Acoustic Transducer [EMAT] for Guided Wave
- Development of a Movable Inspection Sensor for a Pipe Using an Electromagnetic Acoustic Transducer of the Magnetostriction Effect Type
- Temperature Distribution in a Rectangular Space Measured by a Small Number of Transducers and Reconstructed from Reflected Sounds
- Development of an Electromagnetic Acoustic Transducer that can Alternately Drive the Lamb Wave and Shear Horizontal Plate Wave