Visualization of Ultrasonic Waves Scattered From Rear Defects by Using a Laser-Based Imaging Technique

Takatsubo, Junji; Wang, B.; Miyauchi, Hidekazu; Tsuda, Hiroshi; Toyama, Nobuyuki; Urabe, Kei

doi:10.1063/1.3114320

Cited by 6 publications

(4 citation statements)

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“…Yashiro et al . (2008) and Takatsubo et al . (2009) used a pulsed laser excitation scanning system to detect the interaction between ultrasonic wave propagation and defects.…”

Section: Laser Ultrasonic Devicesmentioning

confidence: 91%

Sensing solutions for assessing and monitoring of nuclear power plants (NPPs)

Sohn

Yang

Lee

et al. 2014

Sensor Technologies for Civil Infrastructures

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“…Yashiro et al . (2008) and Takatsubo et al . (2009) used a pulsed laser excitation scanning system to detect the interaction between ultrasonic wave propagation and defects.…”

Section: Laser Ultrasonic Devicesmentioning

confidence: 91%

Sensing solutions for assessing and monitoring of nuclear power plants (NPPs)

Sohn

Yang

Lee

et al. 2014

Sensor Technologies for Civil Infrastructures

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“…A few result-processing algorithms operate mainly in the original space and/or time domains, as summarized in table 1. The possibility of reducing the amplitude of incident wavefield and thereby improving the visibility of anomalous waves was first explored by Takatsubo et al based on the principle of synchronizing differentiation [216], and was also independently explored by Lee et al [112,210,217] in the adjacent waves subtraction (AWS) algorithm. The anomalous waves refer to any waves induced by damage or converted from the incident waves through waves-damage interactions.…”

Section: Spatio-temporal Domainmentioning

confidence: 99%

Guided ultrasonic waves propagation imaging: a review

Chia¹,

Lee²,

Harmin³

et al. 2023

Meas. Sci. Technol.

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This article presents a comprehensive review of the laser-based guided ultrasonic waves propagation imaging (G-UPI) system and respective signal/data processing methods related to the nondestructive testing and evaluation of thin-walled structures. The primary goal of this study is to review and recognize various processing methods, explain the working principles of the most influential methods, and highlight outstanding capabilities. In addition, the suitability of the methods for multiple types of damage and defect in various materials and structures are presented. At the same time, success stories of difficult-to-inspect cases are highlighted. Its secondary goal is to compare and discuss the merits and demerits of the laser-scanning part of the system for ultrasound generation and acquisition to provide a guideline for scanning scheme or hardware selection. Finally, the potential challenges and prospects of the G-UPI are discussed. It is expected that this review would serve as an entrance key for newcomers and a reference point for researchers to explore the opportunities for further improvement in the laser ultrasound-based evaluation of critical engineering structures.

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“…28 Several scanning configurations have been applied to detection of defects in metal and composite structures. Examples of different configurations include excitation laser scanning and an embedded sensor at a fixed point, 25,29 a surface-mounted ultrasonic actuator and sensing laser scanning, [30][31][32][33][34] and a complete noncontact scanning system that can scan both the excitation and sensing laser beams. 23 Once ultrasonic wave propagation is visualized, the interaction of the propagating waves with the defect can be observed.…”

Section: Overview Of Noncontact Laser Ultrasonic Scanning Techniquesmentioning

confidence: 99%

Laser ultrasonic imaging and damage detection for a rotating structure

Park

Sohn

Yeum

et al. 2013

Structural Health Monitoring

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This study presents a laser ultrasonic imaging and damage detection technique that creates images of ultrasonic waves propagating on a rotating structure and identifies damage. Laser ultrasonics is attractive for nondestructive testing mainly because of two reasons: (1) ultrasonic waves can be generated and/or measured in a noncontact manner and (2) even a small defect can be detected when laser ultrasonic scanning produces ultrasonic images with high spatial resolution. However, when it comes to a moving target, it becomes challenging to create reliable ultrasonic images. In this study, ultrasonic wave propagation images are obtained from a rotating blade using a pulse laser beam for ultrasonic generation, a galvanometer for laser scanning, and an embedded piezoelectric sensor for ultrasonic measurement. To properly estimate the laser excitation points during the scanning process rather than to precisely control the excitation points, a simple but rather effective localization technique is developed so that ultrasonic images can be constructed even from a moving target. Once the ultrasonic wave propagation images are created, damage on the target structure is visualized using a specially designed standing wave filter.

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Visualization of Ultrasonic Waves Scattered From Rear Defects by Using a Laser-Based Imaging Technique

Cited by 6 publications

References 0 publications

Sensing solutions for assessing and monitoring of nuclear power plants (NPPs)

Sensing solutions for assessing and monitoring of nuclear power plants (NPPs)

Guided ultrasonic waves propagation imaging: a review

Laser ultrasonic imaging and damage detection for a rotating structure

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