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High-speed angular-scan pulse-echo ultrasonic propagation imager for in situ non-destructive evaluation
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High-speed angular-scan pulse-echo ultrasonic propagation imager for in situ non-destructive evaluation

논문 기본 정보

자료유형
학술저널
저자정보
Syed H. Abbas (Korean Advanced Institute for Science and Technolo) Jung-Ryul Lee (Korean Advanced Institute for Science and Technolo)
저널정보
국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.22 No.2
발행연도
2018.1
수록면
223 - 230 (8page)

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표지
High-speed angular-scan pulse-echo ultrasonic propagation imager for in situ non-destructive evaluation
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초록· 키워드

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This study examines a non-contact laser scanning-based ultrasound system, called an angular scan pulse-echo ultrasonic propagation imager (A-PE-UPI), that uses coincided laser beams for ultrasonic sensing and generation. A laser Doppler vibrometer is used for sensing, while a diode pumped solid state (DPSS) Q-switched laser is used for generation of thermoelastic waves. A high-speed raster scanning of up to 10-kHz is achieved using a galvano-motorized mirror scanner that allows for coincided sensing and for the generation beam to perform two-dimensional scanning without causing any harm to the surface under inspection. This process allows for the visualization of longitudinal wave propagation through-the-thickness. A pulse-echo ultrasonic wave propagation imaging algorithm (PE-UWPI) is used for on-the-fly damage visualization of the structure. The presented system is very effective for high-speed, localized, non-contact, and non-destructive inspection of aerospace structures. The system is tested on an aluminum honeycomb sandwich with disbonds and a carbon fiber-reinforced plastic (CFRP) honeycomb sandwich with a layer overlap. Inspection is performed at a 10-kHz scanning speed that takes 16 seconds to scan a 100 ⨯ 100 mm2 area with a scan interval of 0.25 mm. Finally, a comparison is presented between angular-scanning and a linear-scanning-based pulse-echo UPI system. The results show that the proposed system cThis study examines a non-contact laser scanning-based ultrasound system, called an angular scan pulse-echo ultrasonic propagation imager (A-PE-UPI), that uses coincided laser beams for ultrasonic sensing and generation. A laser Doppler vibrometer is used for sensing, while a diode pumped solid state (DPSS) Q-switched laser is used for generation of thermoelastic waves. A high-speed raster scanning of up to 10-kHz is achieved using a galvano-motorized mirror scanner that allows for coincided sensing and for the generation beam to perform two-dimensional scanning without causing any harm to the surface under inspection. This process allows for the visualization of longitudinal wave propagation through-the-thickness. A pulse-echo ultrasonic wave propagation imaging algorithm (PE-UWPI) is used for on-the-fly damage visualization of the structure. The presented system is very effective for high-speed, localized, non-contact, and non-destructive inspection of aerospace structures. The system is tested on an aluminum honeycomb sandwich with disbonds and a carbon fiber-reinforced plastic (CFRP) honeycomb sandwich with a layer overlap. Inspection is performed at a 10-kHz scanning speed that takes 16 seconds to scan a 100 ⨯ 100 mm2 area with a scan interval of 0.25 mm. Finally, a comparison is presented between angular-scanning and a linear-scanning-based pulse-echo UPI system. The results show that the proposed system can successfully visualize defects in the inspected specimens.an successfully visualize defects in the inspected specimens.

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참고문헌 (26)

참고문헌 신청
Abetew, A.D. / 2017 / Remote defect visualization of standard composite coupons using a mobile pulse-echo ultrasonic propagation imager / Adv. Compos. Mater. 26(1):15~27 Crossref 1989 / ASM Handbook, Volume 17: Nondestructive Evaluation and Quality Control google schola Aylward, R.P. / 1999 / Advances and technologies of galvanometer-based optical scanners / Proc. SPIE 3787:158~164 google schola Bentouhami, F. / 2010 / LUCIE-A flexible and powerful Laser Ultrasonic system for inspection of large CFRP components / Proceedings of the 2nd International Symposium on Laser Ultrasonics google schola Campagne, B. / 2013 / Laser ultrasonic developments for NDT of aeronautic composite parts / Proceedings of the 13th International Symposium on Nondestructive Characterization of Materials (NDCM-XIII) google schola

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