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Scattering-based Defect Characterisation using Laser Ultrasound Arrays
Peter Lukacs;Geo Davis;Don Pieris;Jie Zhang;Katy Tant;Theodosia Stratoudaki
2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS)
Year: 2024 | Conference Paper |
Assessment of defect size, shape and orientation is critical in the field of Non-Destructive Evaluation. This assessment can be performed with high accuracy by measuring the ultrasonic scattered wave field generated by a defect as a function of incidence and reflected angles, and producing the associated scattering matrix. In this work the scattering matrix is measured for defect characterization ...Show More
Grating-lobe Suppression through Angular Weighting for Laser Induced Phased Arrays
Peter Lukacs;Don Pieris;Geo Davis;Paul Wilcox;Theodosia Stratoudaki
2023 IEEE International Ultrasonics Symposium (IUS)
Year: 2023 | Conference Paper |
Cited by: Papers (1)
Laser Induced Phased Arrays (LIPAs) use lasers to generate and detect ultrasound, synthesizing the array in post processing. Data acquisition is done remotely, without couplant, addressing NDE challenges of inspection on complex structures and under extreme environments. Previously high-resolution ultrasonic imaging of components using LIPAs have been demonstrated by capturing the Full Matrix and ...Show More
Grating Lobe Suppression Through Novel, Sparse Laser Induced Phased Array Design
Peter Lukacs;Geo Davis;Don Pieris;Anthony Gachagan;Theodosia Stratoudaki
2022 IEEE International Ultrasonics Symposium (IUS)
Year: 2022 | Conference Paper |
Cited by: Papers (3)
Laser Induced Phased Array (LIPA) is a non-contact, couplant-free inspection technique providing high quality ultrasonic imaging. LIPAs use lasers for ultrasound generation and detection: ultrasonic beam forming is performed in post processing, using delay-and-sum algorithms, while the data acquisition is done by scanning the two lasers, offering a unique flexibility in array designs that are curr...Show More
Remote Ultrasonic Imaging of a Wire Arc Additive Manufactured Ti-6AI-4V Component using Laser Induced Phased Array
Peter Lukacs;Geo Davis;Theodosia Stratoudaki;Stewart Williams;Charles N. MacLeod;Anthony Gachagan
2021 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)
Year: 2021 | Conference Paper |
Cited by: Papers (7)
Additive manufacturing (AM) has been revolutionizing the manufacturing industry due to its ability to significantly reduce waste and produce components with intricate shapes. Laser Ultrasonics (LU) is a non-contact and couplant free method to generate and detect ultrasound. LU can accommodate complex component shapes; thus, it has the potential to provide a reliable in-process inspection method fo...Show More
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