J042012 集束型空気超音波センサーによる円周Lamb波の効率的励起メカニズムと減肉計測への応用([J04201]超音波計測・解析法の新展開(1))

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概要

• 論文の詳細を見る

• Efficient transduction of a circumferential (C-) Lamb wave by a pair of noncontact air-coupled ultrasonic transducers (NAUT) was presented. A line focus type (LFT-) of the NAUT was employed for the efficient transduction. Characteristics of the LFT-NAUT were theoretically and experimentally shown in comparison to those of the conventional plane type (CPT-) NAUT. The efficiency of the C-Lamb wave generated and detected by the LFT-NAUT took about 20 times higher than that by the CPT-NAUT. As for an application of the C-Lamb wave generated by the LFT-NAUT, a novel method of an accurate estimation of pipe wall thickness was introduced and evaluated with a theoretical model. It was confirmed that the averaged error between the experiments and the theoretical model was at less than 10 μm.

• 一般社団法人日本機械学会の論文
• 2011-09-11

著者

• 西野 秀郎

  The University of Tokushima

• 吉田 憲一

  The University of Tokushima

• 小倉 幸夫

  Japan Probe Co. Ltd.

• 小川 仁

  仁

• 谷口 優太

  徳島大学大学院先端技術科学教育部

• 高橋 雅和

  Japan Probe Co. Ltd.

関連論文

• J042012 集束型空気超音波センサーによる円周Lamb波の効率的励起メカニズムと減肉計測への応用([J04201]超音波計測・解析法の新展開(1))

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