Results 171 to 180 of about 4,717 (201)

Ultrasonic backscatter measurements using phased array ultrasonic transducers

The Journal of the Acoustical Society of America
Diffuse 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, Nathanial Matz, Joseph A. Turner   +2 more
openaire   +1 more source

Ultrasonic phased array design for reduced crosstalk

The Journal of the Acoustical Society of America, 1998
In recent years, therapeutic ultrasound has received increased attention as a treatment modality for cancer therapy (hyperthermia) and heart arrythmia (ablation surgery). Ultrasonic phased arrays offer the benefit of noninvasive treatment with the flexibility of variable focus and beam steering. In designing and building these arrays, electromechanical
John Dodson, Karl Grosh
openaire   +1 more source

Portable Ultrasonic Phased Array System

2004
A 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
openaire   +1 more source

Ultrasonic receive beamformer with phased sub-arrays

The Journal of the Acoustical Society of America, 1997
An 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 ...
openaire   +1 more source

Two-dimensional phased array of ultrasonic transducers

The Journal of the Acoustical Society of America, 1991
A 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.
openaire   +1 more source

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, 2023
Mahmoud Ebrahimi
exaly  

Applications of ultrasonic phased arrays

Insight - Non-Destructive Testing and Condition Monitoring, 2003
openaire   +2 more sources

Evaluation of material degradation using phased array ultrasonic technique with full matrix capture

Engineering Failure Analysis, 2021
Santhakumar Sampath, Hoon Sohn, Anish Kumar   +2 more
exaly  

Application of phased arrays in ultrasonic nondestructive testing

2020
The 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, Samiru Alhassan   +1 more
openaire   +1 more source

Phased array for ultrasonic transducer

The Journal of the Acoustical Society of America, 1986
openaire   +1 more source