Results 11 to 20 of about 1,828,003 (344)
Ultrasonic Mammography with Circular Transducer Array [PDF]
Archives of Acoustics, 2014 Ultrasonic projection imaging is similar to X-ray radiography. Nowadays, ultrasonic projection methods have been developed in the set-up of multi-element flat arrays with miniature transducers, where one of the array acts as a transmitter and the other ...
Krzysztof J. OPIELIŃSKI +2 more
doaj +2 more sources
High-Frequency Ultrasound Focusing Using Low-Cost PMMA and PDMS Acoustic Lenses [PDF]
MicromachinesThis study presents a high-frequency ultrasound lens system that uses simply fabricated and low-cost acoustic lenses made from PMMA and PDMS materials.
Mohammadamir Ghasemishabankareh +3 more
doaj +2 more sources
3D cone-beam breast ultrasonic tomography imaging for capacitive micromachined ultrasonic transducer cylindrical array [PDF]
JASA Express Letters, 2021 In this paper, a 3D cone-beam ultrasonic transmission tomography method for capacitive micromachined ultrasonic transducer (CMUT) cylindrical phased array was proposed.
Yu Pei +6 more
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Aerospace, 2023 Carbon fiber-reinforced polymers (CFRP) are extensively used in aerospace applications. Out-of-plane wrinkles frequently occur in aerospace CFRP parts that are commonly large and complex.
Tengfei Ma +3 more
semanticscholar +1 more source
Applied Physics A, 2023 In response to the continuous demand for industry progress and the need for low-cost alternative materials that have superior properties than the present ones, a new coupling agent was used to treat composites, which were used as new backing materials in
Mirham A. Y. Barakat +3 more
semanticscholar +1 more source
Numerical simulation of phased array ultrasonic testing for fillet weld defects of type-B sleeve
You-qi chuyun, 2022 Type-B sleeve repair is one of the main permanent repair methods for long-distance oil and gas pipelines at present. However, fillet weld defects are often produced during the operation, which need to be detected and evaluated by phased array ultrasonic ...
Hongbo ZHANG +5 more
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Ultrasonics, 2022 With the increasing use of high density polyethylene (HDPE) pipes in nuclear industry which puts safety at the forefront, ultrasonic array imaging methods play a vital role in the structural integrity of HDPE pipe materials.
J. Rao +5 more
semanticscholar +1 more source
Frontiers in Earth Science, 2022 In order to improve the accuracy and efficiency of deep in-situ stress measurement, based on the wall collapse in deep borehole, a deep borehole in-situ stress measurement method based on multi-array ultrasonic scanning technology is proposed in this ...
Jinchao Wang +5 more
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Sensors, 2022 Butt welding is extensively applied in long-distance oil and gas pipelines, and it is of great significance to conduct non-destructive ultrasonic testing of girth welds in order to avoid leakage and safety accidents during pipeline production and ...
Bolun Li +6 more
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Nonlinear Ultrasonic Phased Array Imaging [PDF]
Physical Review Letters, 2014 This Letter reports a technique for the imaging of acoustic nonlinearity. By contrasting the energy of the diffuse field produced through the focusing of an ultrasonic array by delayed parallel element transmission with that produced by postprocessing of sequential transmission data, acoustic nonlinearity local to the focal point is measured. Spatially
Potter, J. N. +2 more
openaire +3 more sources