Composite NDE using full-field pulse-echo ultrasonic propagation imaging system

Hong, Seung-Chan; Lee, Jung-Ryul; Park, Jongwoon

doi:10.1117/12.2219659

Cited by 3 publications

(8 citation statements)

References 3 publications

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“…C‐scan results of aluminium honeycomb sandwich specimen a Linear PE UPI system at 15.6 μs [5 ] b Robotic PE UPI system at 15.6 μs…”

Section: System Verification Using Honeycomb Sandwich Specimenmentioning

confidence: 99%

“…Aluminium honeycomb sandwich specimen a Dimensions and C‐scan area of a specimen b Specimen defects in [5 ]…”

Section: System Verification Using Honeycomb Sandwich Specimenmentioning

confidence: 99%

“…The range of the band‐pass filter was set at 50–250 kHz. The robotic PE UPI system experiment results were compared to those of the linear stage PE UPI system of Hong et al [5 ].…”

Section: System Verification Using Honeycomb Sandwich Specimenmentioning

confidence: 99%

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Robotic scanning technology for laser pulse‐echo inspection

et al. 2020

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The full‐field pulse‐echo ultrasonic propagation imaging (PE UPI) system using a two‐axis linear stage has been successfully used to perform a non‐destructive evaluation of flat specimens. This study used a six‐axis robot arm to develop a robotic scanning algorithm that can be applied to the laser pulse‐echo inspection of non‐flat objects. The robotic PE UPI system was constructed and verified for both flat and curved specimens. The internal structures and defects of a honeycomb sandwich plate and a glass‐fibre‐reinforced polymer specimen were visualised by the robotic PE UPI system. The quality of the evaluation of the flat specimen was equivalent to that of a two‐axis linear system, and the result of the curved specimen showed improvement compared to that of the linear system. The ability of the robotic scanning technique to evaluate the structural health performance of arbitrarily shaped surfaces was validated.

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“…C‐scan results of aluminium honeycomb sandwich specimen a Linear PE UPI system at 15.6 μs [5 ] b Robotic PE UPI system at 15.6 μs…”

Section: System Verification Using Honeycomb Sandwich Specimenmentioning

confidence: 99%

“…Aluminium honeycomb sandwich specimen a Dimensions and C‐scan area of a specimen b Specimen defects in [5 ]…”

Section: System Verification Using Honeycomb Sandwich Specimenmentioning

confidence: 99%

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Robotic scanning technology for laser pulse‐echo inspection

et al. 2020

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“…Such a laser-based UT method was proposed by Hong et al 6 for the non-destructive and contactless inspection of structures. The pulse-echo ultrasonic propagation imaging (PE UPI) technique makes use of an excitation and a sensing laser to generate and detect through-the-thickness ultrasounds in the specimen.…”

Section: Introductionmentioning

confidence: 99%

“…This path planning can be done either offline or online. The offline methods use either fixed scan shape and scan path 6,13 or it generates the scan path based on computer-aided design (CAD) model of the specimen; 14 optionally, specimen-sensing techniques may also be used to compliment the CAD driven scan path. 15,16 While the former non-flexible approach results in scan paths not conforming to the specimen under test, the later approach adds pre-conditions to the inspections.…”

Section: Introductionmentioning

confidence: 99%

Development of autonomous target recognition and scanning technology for pulse-echo ultrasonic propagation imager

Ahmed

Lee

2019

Structural Health Monitoring

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This article proposes a pulse-echo ultrasonic propagation imaging system that is capable of autonomous target recognition and scanning an area of a customizable shape for the non-destructive evaluation of structural defects. The proposed system employs through-the-thickness bulk waves for ultrasonic inspection, which is achieved by joining two laser beams: one each for the ultrasonic wave generation and sensing. Moreover, the system is capable of autonomously suggesting a suitable inspection area for a specimen placed in front of the scanning head. The scan area delimitation algorithm uses the specimen image and ascertains the specimen border by means of edge and contour detection operations, following which a scan area closely conforming to the specimen boundary is suggested. The system can scan an area of any arbitrary shape, thereby preventing any wasteful operations that may result from fixed shape (rectangular or square) scanning. A Q-switched laser is used for generating the aforementioned ultrasonic waves, while a laser Doppler vibrometer is used for sensing these signals. A dual-axis automated translation stage is applied for raster scanning of the specimen, and a data acquisition card is employed for taking measurements. A camera mounted on the scan head is used for imaging the specimen for the scan area detection. Graphical user interface software controls all the individual blocks of the system, while implementing the required image processing, scan area detection, signal acquisition, signal processing, and result display. The graphical user interface is created in C++ using the Qt framework. Moreover, Qt Widgets for Technical Applications is used for the result display, and the Open Source Computer Vision Library is employed for the implementation of basic image processing algorithms. Multi-threading is used for real-time updating of the scan results while the scanning is ongoing.

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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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Composite NDE using full-field pulse-echo ultrasonic propagation imaging system

Cited by 3 publications

References 3 publications

Robotic scanning technology for laser pulse‐echo inspection

Robotic scanning technology for laser pulse‐echo inspection

Development of autonomous target recognition and scanning technology for pulse-echo ultrasonic propagation imager

Guided ultrasonic waves propagation imaging: a review

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