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논문 기본 정보

자료유형
학술저널
저자정보
Je-Woong Park (Chosun University) Do-Jung Kim (Chosun University) Young-Sub Kweon (Chosun University) Kwang-Hee Im (Woosuk University) David K. Hsu (Iowa State University) Sun-Kyu Kim (Chonbuk National University) In-Young Yang (Chosun University)
저널정보
한국비파괴검사학회 비파괴검사학회지 비파괴검사학회지 제29권 제3호
발행연도
2009.6
수록면
235 - 241 (7page)

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초록· 키워드

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Composite wood materials are very sensitive to water and inspection without any coupling medium of a liquid is really needed to wood materials due to the permeation of coupling medium such as water. However, air-coupled ultrasound has obvious advantages over water-coupled experimentation compared with conventional C-scanner. In this work, it is desirable to perform contact-less nondestructive evaluation to assess wood material homogeneity. A wood material was nondestructively characterized with non-contact and contact modes to measure ultrasonic velocity using automated data acquisition software. We have utilized a proposed peak-delay measurement method. Also through transmission mode was performed because of the main limitation for air-coupled transducers, which is the acoustic impedance mismatch between most materials and air. The variation of ultrasonic velocity was found to be somewhat difference due to air-coupled limitations over conventional scan images. However, conventional C-scan images are well agreed with increasing the resin-infiltrated time as expected. Finally, we have developed a measurement system of an ultrasonic velocity based on data acquisition software for obtaining ultrasonic quantitative data for correlation with C-scan images.

목차

Abstract
1. Introduction
2. Experimental Approach
3. Test Result and Examination
4. Summary and Conclusions
References

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