지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.12
- 수록면
- 696 - 702 (7page)
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초록· 키워드
오류제보하기
In this study, a noncontact laser ultrasonic system is proposed for rail defect detection. An Nd-Yag pulse laser is used for generation of ultrasonic waves, and the corresponding ultrasonic responses are measured by a laser Doppler vibrometer. For the detection of rail surface damages, the shape of the excitation laser beam is transformed into a line. On the other hand, a point source laser beam is used for the inspection of defects inside a rail head. Then, the interactions of propagating ultrasonic waves with defects are examined using actual rail specimens. Amplitude attenuation was mainly observed for a surface crack, and reflections were most noticeable from an internal damage. Finally, opportunities and challenges associated with real-time rail inspection from a high-speed train are discussed.
목차
Abstract
1. Introduction
2. Noncontact Laser Ultrasonic System
3. Experimental Setup
4. Experimental Results
5. Conclusions
References
참고문헌 (6)
참고문헌 신청
1. [학술대회논문] - S. W. Han / 2011 / Review ofrail inspection technology / Proc. of 2011Spring Conference of Korean Society forRailway : 154 ~ 161
2. [학술지(정기간행물)] - S. Kenderian / 2001 / Point and line sourcegeneration of ultrasound for inspection ofinternal and surface flaws in rail andstructural materials / Research inNondestructive Evaluation 13 (4) : 189 ~ 200
3. [학술지(정기간행물)] - J. W. Wagner / 1988 / Generation of ultrasound byrepetitively Q-switching a pulsed Nd:YAGlaser / Appl. Opt 27 : 4696 ~ 4700
4. [단행본] - C. B. Scruby / 1990 / Laser Ultrasonic: Techniques and Applications / Adam Hilger
5. [학술지(정기간행물)] - M. Bauer / 2002 / High-precision laser vibrometers based ondigital Doppler-signal processing / Proc.SPIE 4827 : 50 ~ 61
2. [학술지(정기간행물)] - S. Kenderian / 2001 / Point and line sourcegeneration of ultrasound for inspection ofinternal and surface flaws in rail andstructural materials / Research inNondestructive Evaluation 13 (4) : 189 ~ 200
3. [학술지(정기간행물)] - J. W. Wagner / 1988 / Generation of ultrasound byrepetitively Q-switching a pulsed Nd:YAGlaser / Appl. Opt 27 : 4696 ~ 4700
4. [단행본] - C. B. Scruby / 1990 / Laser Ultrasonic: Techniques and Applications / Adam Hilger
5. [학술지(정기간행물)] - M. Bauer / 2002 / High-precision laser vibrometers based ondigital Doppler-signal processing / Proc.SPIE 4827 : 50 ~ 61
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UCI(KEPA) : I410-ECN-0101-2014-500-003306967