Results 51 to 60 of about 6,397,796 (189)

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, Yujian Mei, Haoran Jin, Eryong Wu, Keji Yang   +4 more
openaire   +1 more source

Near-surface defect detection in additively manufactured components using laser induced phased arrays with surface acoustic wave crosstalk suppression

Materials & Design, 2023
In-process inspection of the additive manufacturing process requires a technique that can provide reliable measurements given the extreme operating environments, the small size of the defects and the cyclic melting and heating of the material, caused by ...
Geo Davis, Theodosia Stratoudaki, Peter Lukacs, Matthew W. Riding, Ahmed Al Fuwaires, Panagiotis Kamintzis, Don Pieris, Alan Keenan, Paul Wilcox, Gareth Pierce, Charles MacLeod, Stewart Williams   +11 more
doaj   +1 more source

Full-Matrix Imaging in Fourier Domain towards Ultrasonic Inspection with Wide-Angle Oblique Incidence for Welded Structures

Sensors
The total focusing method (TFM) has been increasingly applied to weld inspection given its high image quality and defect sensitivity. Oblique incidence is widely used to steer the beam effectively, considering the defect orientation and structural ...
Mu Chen, Xintao Xu, Keji Yang, Haiteng Wu   +3 more
doaj   +1 more source

An Adaptive Total Focusing Method for Ultrasonic Imaging ofArbitrarily Stacked Carbon Fiber-Reinforced Composites

e-Journal of Nondestructive Testing
The total focusing method (TFM) is increasingly recognized as a powerful ultrasonic imaging technique for the quality assessment and internal defect detection of carbon fiber-reinforced composites (CFRPs).
Jiancheng Cao, Jingli Yan, Hui Ding, Jun Zhang   +3 more
doaj   +1 more source

Screening of Corrosion in Storage Tank Walls and Bottoms Using an Array of Guided Wave Magnetostrictive Transducers

Sensors
Aboveground storage tanks are used to store various fluids and chemicals for many industrial purposes. According to API standard 653, the structural integrity of these tanks must be regularly assessed. The U.S.
Sergey Vinogradov, Nikolay Akimov, Adam Cobb, Jay Fisher   +3 more
doaj   +1 more source

High-density polyethylene buried natural gas pipe butt fusion joint defects automatic detection via total focusing method and deep learning [PDF]

MATEC Web of Conferences
This paper presents a defect detection method for butt fusion joints of high-density polyethylene (HDPE) pipes based on deep learning, which aims to achieve both high accuracy and rapid detection.
Wang Qiang, Zhang Haowen, Chen Tianliang, Xu Weirong   +3 more
doaj   +1 more source

Deep learning framework for image enhancement of phased array ultrasonic imaging

Results in Engineering
Phased array ultrasonic imaging is widely used in non-destructive testing for defect detection. Sector scan (S-scan) is widely used method for rapid inspection at lower resolution.
Keonhyeok Park, Jun Hyeong Park, Bumsoo Park, Hyung Jin Lee, Sooyoung Lee, Iljoo Jeong, Anna Lee, Choon-Su Park, Seungchul Lee   +8 more
doaj   +1 more source

Total focusing method (TFM) robustness to material deviations [PDF]

AIP Conference Proceedings, 2018
Guillaume Painchaud-April, Nicolas Badeau, Benoit Lepage   +2 more
openaire   +1 more source

Direction finding method for wideband signals base on consistent focusing

Tongxin xuebao, 2006
MTLS focusing method needs estimating direction of arrival firstly.Estimation bias in only few frequency bins could impair the entire USCM（universal spatial covariance matrix）estimation.Consistent MTLS focusing method was proposed based on the idea of ...
CHEN Hong-guang, YU Sheng-fa, SHEN Zhen-kang   +2 more
doaj   +2 more sources

HDPE pipe butt fusion joint defects ultrasonic automatic detection via phase coherence TFM imaging and improved YOLOX model

Polymer Testing
Detection of butt fusion joints is essential for in-service high-density polyethylene (HDPE) natural gas pipe operating safety. A directivity-compensated circular coherence factor weighted total focusing method (D-CCF-TFM) algorithm is presented to solve
Haowen Zhang, Tianliang Chen, Qiang Wang, Zhaodong Zhang, Quanjing Xiao, Yanlei Liu   +5 more
doaj   +1 more source