Results 311 to 320 of about 16,629 (343)
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Ultrasonic receive beamformer with phased sub-arrays
The Journal of the Acoustical Society of America, 1997An ultrasonic receive beamformer includes transducers forming receive signals that are applied to sub-array processors. Each sub-array processor includes at least one phase shifter and a summer, and each phase shifter is responsive to at least one of the transducer signals to shift the transducer signal by a respective phase angle and to apply the ...
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Ultrasonic Phased Array Technology in the Pipeline Industry
Volume 2: Integrity and Corrosion; Offshore Issues; Pipeline Automation and Measurement; Rotating Equipment, 2000This paper presents an overview of current pipeline inspection techniques, and a more in depth discussion of phased array technology as it applies to the inspection of automated GMAW girth welds in big inch pipelines.
Eric M. Sjerve +2 more
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Ultrasonic backscatter measurements using phased array ultrasonic transducers
The Journal of the Acoustical Society of AmericaDiffuse ultrasonic backscatter techniques are used to characterize microstructures and work well when grain scattering is confined within the single-scattering regime. When effects from higher-order scattering are present within the measurements, grain sizes are often overestimated.
Geoffrey R. Soneson +2 more
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Two-dimensional phased array of ultrasonic transducers
The Journal of the Acoustical Society of America, 1991A two-dimensional ultrasonic phase array is a rectilinear approximation to a circular aperture and is formed by a plurality of transducers, arranged substantially symmetrical about both a first (X) axis and a second (Y) axis and in a plurality of subarrays, each extended in a first direction (i.e.
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Ultrasonic measurement models for imaging with phased arrays
AIP Conference Proceedings, 2014Ultrasonic imaging measurement models (IMMs) are developed that generate images of flaws by inversion of ultrasonic measurement models. These IMMs are generalizations of the synthetic aperture focusing technique (SAFT) and the total focusing method (TFM).
Lester W. Schmerr, Jr. +3 more
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Portable Ultrasonic Phased Array System
2004A new portable Phased Array System is presented in this contribution. Due to the modern computer technology it allows to generate in a fast way sector scans with extremely high lateral and axial resolution. The sector scan image is a final composition of separate scans with sound beams being focussed to different depths and then scanned by sweeping and
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Study of Ultrasonic Phased Array in Underwater Welding
2017The popular sensors used in water have a lot of difficulties when compared with those used in land welding automation. It is meaningful to find a new kind of sensor which is suitable to work in underwater welding. Ultrasonic phased array (PA) can work in water conveniently and send out required sound beam.
Jianxiong Ye +4 more
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Ultrasonic and phased-array inspection in titanium-based alloys: A review
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 2023Mahmoud Ebrahimi
exaly
Application of phased arrays in ultrasonic nondestructive testing
2020The object of the research is ultrasonic nondestructive testing. The purpose of the work is to make analytical comparison of the techniques for ultrasonic with phased arrays. In the course of research the most promising techniques for ultrasonic imaging with phased arrays was determined according to analytical study of literature sources.
Fidel Castro Parimala Rangan +1 more
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Evaluation of material degradation using phased array ultrasonic technique with full matrix capture
Engineering Failure Analysis, 2021Santhakumar Sampath +2 more
exaly