Detecting pipe wall reduction using air-coupled MHz range ultrasonic wave

IEICE Electronics Express

Kazuhiko Imano¹  Masaaki Kondou¹ 

[1] Department of Electrical & Electronic Engineering, Faculty of Engineering and Resource Science, Akita University

关键词: air-coupled ultrasonic wave;    megahertz range;    wall reduction;    nondestructive evaluation;   

DOI  :  10.1587/elex.6.613

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(4)Cited-By(1)Air-coupled ultrasonic waves in the megahertz range are applied for noncontact detection in a pipe wall reduction model. Various widths and depths of pipe wall reductions were used, and the pipes were irradiated with 1.2MHz air-coupled ultrasonic waves. F-mode guide waves were used to detect the defects in the pipe walls. The experimental results confirmed that ultrasonic waves reflecting from areas of wall reduction in the pipes could be detected. A wall reduction of about 10mm could be deduced from the reflected waveforms. A clear correlation between the depth of the wall reduction and the amplitude of the reflected waves was found.

【 授权许可】

Unknown