Long Range Ultrasonic Guided Wave Technique for Inspection of Pipes

Park, Ik Keun; Kim, Yong Kwon; Kim, Hyun Mook; Song, Won Joon; Cho, Young‐Sam

doi:10.4028/0-87849-412-x.799

Cited by 1 publication

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“…장점을 가지고 있어 활발히 연구되고 있다 [1][2][3] . 기존의 유도초음파 기술은 결함특성, 즉 크기나 형상에 대한 정확한 정보를 제공하지 못하여 이를 보완하기위해 여러 개의 센서를 장착하거나 검사부위 를 탐상하여 이미지화하는 연구를 수행하고 있다.…”

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Development of Tomograph Technique for Evaluating Thickness Reduction using Noncontact Ultrasonic Sensor Network

Lee¹,

Kim²,

Park³

2014

Journal of manufacturing engineering & technology

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ARTICLE INFO ABSTRACT Article history:This paper describes a tomographic imaging technique for evaluating the thickness reduction of a plate-like structure using a noncontact sensor network based on an electromagnetic acoustic transducer that generates shear horizontal plate waves. Because this technique is based on the effect of mode cutoff and time of flight of guided waves caused by a change in thickness, the tomographic image provides information on the presence of defects in the structure. To verify the performance of the method, artificial defects with various thickness reduction ratios were machined in an aluminum plate, and the tomographic imagingresults are reported. The results show that the generated tomographic image displays the thickness reductions and can identify their locations. Therefore, the proposed technique has good potential as a tool for health monitoring of the integrity of plate-like structures.

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