Results 21 to 30 of about 2,327,371 (190)
Laser-induced ultrasonic measurements for the detection and reconstruction of surface defects
Acta Acustica, 2021 Laser-induced ultrasonic measurement is a non-contact non-destructive technology that can be employed for the testing and assessment of surface defects.
Qian Feiming +5 more
doaj +1 more source
IEEE Access, 2020 Ultrasonic phased array technology is used in various fields. Traditional full phased arrays place elements in every position of a uniform lattice with half-wavelength spacing between the lattice points, so the hardware cost is very high.
Han Zhang +3 more
doaj +1 more source
Laser induced ultrasonic phased array using Full Matrix Capture data acquisition and Total Focusing Method [PDF]
, 2015 Laser based ultrasound is a technique where a short pulsed laser is used to generate ultrasound and optical interferometry is used in order to detect the signal.
Clark, Matt +2 more
core +4 more sources
Multi-Mode Total Focusing Method (MTFM) to Detect High-Temperature Hydrogen Attack (HTHA) – A Review
Journal of Materials Exploration and Findings, 2023 High temperature hydrogen attack (HTHA) is a commonly observed harm component in carbon steels exposed to high temperature and pressure in a hydrogen-rich environment. Hydrogen together with carbon responds to produce methane.
Anjar Oktikawati +2 more
doaj +1 more source
Ultrasonic phased array total focusing method based on sparse deconvolution [PDF]
Proceedings of Meetings on Acoustics, 2018 Ultrasonic phased array total focusing method (TFM) has been widely used in the field of non-destructive testing (NDT) as an advances post-processing imaging algorithm. It shows great potential in defect detection and characterization. However, due to the small number of excitation elements and large amount of collecting data, its temporal resolution ...
Bei Yu +4 more
openaire +1 more source
Sensors, 2020 Plane wave imaging (PWI) is attracting more attention in industrial nondestructive testing and evaluation (NDT&E). To further improve imaging quality and reduce reconstruction time in ultrasonic imaging with a limited active aperture, an optimized PWI ...
Hao Sui +3 more
doaj +1 more source
Fighting against fast speckle decorrelation for light focusing inside live tissue by photon frequency shifting [PDF]
, 2020 Light focusing inside live tissue by digital optical phase conjugation (DOPC) has drawn increasing interest due to its potential biomedical applications in optogenetics, microsurgery, phototherapy, and deep-tissue imaging.
Cheng, Zhongtao +5 more
core +1 more source
Total Focusing Method (TFM) and Phase Coherence Imaging (PCI) applied to various industrial cases
e-Journal of Nondestructive Testing, 2023 Imaging techniques based on ultrasonic Total Focusing Method (TFM1) are more and more applied for industrial applications. Adoption of the technique has been made easier with the publication of the revised ASME V and ISO 23864 and 23865 standards.
Frederic Reverdy, Paul Hillman, Guy Maes
doaj +3 more sources
Sensors, 2019 Ultrasonic arrays have been investigated for inspecting the quality of special materials. Unfortunately, non-destructive testing and evaluation (NDT&E) of internal defects in additive manufacturing (AM) materials are difficult due to the anisotropy ...
Wentao Li, Zhenggan Zhou, Yang Li
doaj +1 more source
Plane Wave Imaging through Interfaces
Sensors, 2021 Plane Wave Imaging (PWI) has been recently proposed for fast ultrasound inspections in the Non-Destructive-Testing (NDT) field. By using a single (or a reduced number) of plane wave emissions and parallel beamforming in reception, frame rates of hundreds
Guillermo Cosarinsky +2 more
doaj +1 more source