Results 211 to 220 of about 993,506 (266)
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Ultrasonic C-scan imaging for material characterization
Ultrasonics, 1993Abstract Advances in the field have enabled ultrasonic C-scan imaging to go beyond its classical application of detecting large single flaws to meet the challenge of non-destructive evaluation for modern engineered structures and new materials. Increased frequency of operation and novel transducer designs have led to micrometre resolution limits for ...
G.A. Gordon, S. Canumalla, B.R. Tittmann
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Automated Ultrasonic Testing of Materials based on C-scan Flaw Classification
2021 12th International Symposium on Image and Signal Processing and Analysis (ISPA), 2021The analysis of the data in non-destructive ultrasonic testing of materials is a very time- intensive task. To alleviate the aforementioned strain on the human expert inspectors, a plethora of assisted analysis methods based on deep learning have been developed recently.
Branimir Filipovic +5 more
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Evaluation of ultrasonic C-scan attenuation image
IEEE 1991 Ultrasonics Symposium, 2002Temporal averaging and homomorphic processing, which extract the local ultrasonic wavelet and estimate the attenuation coefficient, have been incorporated into C-scan imaging to generate and attenuation map. The variation of this map displays changes in the scattering cross section and in the absorption of materials.
T. Wang, J. Saniie
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Defect Monitoring of CFRP with Ultrasonic C-Scan Method
Advanced Materials Research, 2011In this study, carbon fiber reinforced polymer (CFRP) laminates that were under three-point bending load within and without initial impact damage, were detected and monitored by ultrasonic C-scan method. The defect morphology at various load levels was recorded.
Peng Li +5 more
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Improved C-scan imaging using a Bayesian approach
2010 IEEE International Ultrasonics Symposium, 2010Conventional ultrasonic C-scan imaging in composite materials typically employs peak amplitude extraction where the obtained image quality is extremely dependent on the gate setup on the ultrasonic acquisition hardware. Additionally structural noise created by scattering phenomenon is often high enough to bury meaningful reflection echoes, due to the ...
K. S. Ho +4 more
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LOW-COST DEVICE FOR C-SCAN PHOTOACOUSTIC IMAGING
The Journal of the Acoustical Society of America, 2013The prostate gland or other region of interest is stimulated with laser light, resulting in ultrasound waves (photoacoustic effect) which are focused by an acoustic lens and captured by a specific 1- or 2D sensor array and subsequently displayed as a C-scan on a computer screen.
Vikram S. Dogra, Navalgund A. H. K. Rao
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An inexpensive computer-controlled ultrasonic C-scan system
NDT International, 1983Abstract A microcomputer-controlled ultrasonic C-scan system is described with emphasis on interfacing and image formation. Examples are given which illustrate the potential of the system for quantitative C-scanning and image enhancement. The system was assembled from inexpensive off-the-shelf items of equipment.
M. Moghisi, D.P. Almond
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Blind image-deconvolution for ultrasonic C-scans
AIP Conference Proceedings, 2001Ultrasonic C-scan images suffer from the problem of gating truncations, blurring due to quantization and squaring distortion, and noise. In this work the H∞ identification strategy is presented to restore the image without any prior information about the distortion and noise, hence the scheme is called blind deconvolution.
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Phased subarrays for low cost C-Scan applications
IEEE Ultrasonics Symposium, 2005., 2006The performance of subarray processing as a means of reducing overall beamforming computational load for a low cost C-Scan imaging device is analyzed. Unlike the case encountered in B-Mode imaging, the C-Scan format is characterized by a large channel count (4096 in this case) and very short data record lengths. Additionally, unlike the case in B-Mode,
Y. Li +3 more
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Novel approach to secure channel using C-SCAN and microcontroller in openflow
2013 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), 2013Openflow is a openly managed platform to future internet. Various approaches are given to widely implement this. The main concept of openflow is transferring the data packet in minimum path and cost which completely depends upon the controller-switch connection.
S. Veeramani +2 more
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