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NDT & E international, 2022
The random microdefects are inevitable during the Selective laser melting (SLM) process due to the principle of discrete-stacking. The rough surface induced strong background noise reduces the probability of detection of traditional laser ultrasonic ...
X. Wanli +7 more
semanticscholar +1 more source
The random microdefects are inevitable during the Selective laser melting (SLM) process due to the principle of discrete-stacking. The rough surface induced strong background noise reduces the probability of detection of traditional laser ultrasonic ...
X. Wanli +7 more
semanticscholar +1 more source
Laser ultrasonic imaging of complex defects with full-matrix capture and deep-learning extraction.
Ultrasonics, 2022Phased array-based full-matrix ultrasonic imaging has been the golden standard for the non-destructive evaluation of critical components. However, the piezoelectric phased array cannot be applied in hazardous environments and online monitoring due to its
Yujian Mei +4 more
semanticscholar +1 more source
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2020
This work demonstrates the ultrasonic imaging ability of piezoelectric micromachined ultrasonic transducer (PMUT) for the detection of defects deep in solids by total-focus imaging algorithm.
Weiliang Ji +8 more
semanticscholar +1 more source
This work demonstrates the ultrasonic imaging ability of piezoelectric micromachined ultrasonic transducer (PMUT) for the detection of defects deep in solids by total-focus imaging algorithm.
Weiliang Ji +8 more
semanticscholar +1 more source
, 2021
Transverse cracks in the rail foot are responsible for the breaking of the rail. The existing non-destructive testing technology for high-speed railway track is difficult to perform in-situ and rapid detection for the rail foot, which poses a hidden ...
Songtao Hu +5 more
semanticscholar +1 more source
Transverse cracks in the rail foot are responsible for the breaking of the rail. The existing non-destructive testing technology for high-speed railway track is difficult to perform in-situ and rapid detection for the rail foot, which poses a hidden ...
Songtao Hu +5 more
semanticscholar +1 more source
Ultrasonic probe, ultrasonic imaging apparatus and ultrasonic imaging method
The Journal of the Acoustical Society of America, 2007An ultrasonic probe is disclosed for reducing the influence of electromagnetic wave leakage to a magnetic resonance imaging (MRI) device even when the probe is inside the MRI gantry. The ultrasonic probe includes a piezoelectric material, an acoustic matching layer provided on the ultrasonic radiation side of the piezoelectric material, and backing ...
Takashi Azuma, Shinichiro Umemura
openaire +1 more source
, 2021
Ultrasonic full-matrix imaging can sense small defects in non-destructive evaluation using full-matrix capture (FMC). However, the accompanying heavy computational burden limits FMC’s applications, especially for real-time scenarios.
Haoran Jin, Jian Chen
semanticscholar +1 more source
Ultrasonic full-matrix imaging can sense small defects in non-destructive evaluation using full-matrix capture (FMC). However, the accompanying heavy computational burden limits FMC’s applications, especially for real-time scenarios.
Haoran Jin, Jian Chen
semanticscholar +1 more source
Full-Matrix Phase Shift Migration Method for Transcranial Ultrasonic Imaging
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2020A spectrum-domain method, called full-matrix phase shift migration (FM-PSM), is presented for transcranial ultrasound phase correction and imaging with ideal synthetic aperture focusing technology.
Chen Jiang, Ying Li, Kailiang Xu, D. Ta
semanticscholar +1 more source
Ultrasonics, 1980
The feasibility of noise measurement in medical ultrasonic imaging has been studied and a theoretical evaluation of stochastic noise influence upon the perceived image has been undertaken. The influence of noise on a perceived image has been calculated by considering the light intensity perception characteristic of the human eye and it has been found ...
Viculin, Tomislav +2 more
openaire +3 more sources
The feasibility of noise measurement in medical ultrasonic imaging has been studied and a theoretical evaluation of stochastic noise influence upon the perceived image has been undertaken. The influence of noise on a perceived image has been calculated by considering the light intensity perception characteristic of the human eye and it has been found ...
Viculin, Tomislav +2 more
openaire +3 more sources
Digitization of Ultrasonic Images
Radiology, 1970Abstract The authors describe a method for digitizing diagnostic ultrasonic data using a system originally constructed for use with radioisotope scan data. A commercial ultrasonic unit drives the transducer and amplifies the preliminary echo signal. The output signals from the ultrasonic unit are fed to a programmable digital logic interface coupled to
J J, Erickson, A B, Brill
openaire +2 more sources
Ultrasonic imaging of irregularly shaped notches based on elastic reverse time migration
NDT & E international, 2019Ultrasonic techniques have been proved to be useful for detection and characterization of flaws in solid structures. However, it remains challenging to characterize flaws that do not have regular shapes.
J. Rao +4 more
semanticscholar +1 more source