Results 11 to 20 of about 1,899,314 (382)
A SAFT Method for the Detection of Void Defect inside a Ballastless Track Structure Using Ultrasonic Array Sensors. [PDF]
Sensors (Basel), 2019 High-precision ultrasound imaging of void defects is critical for the performance and safety assessment of ballastless track structures. The sound propagation velocity of each layer in the ballastless track structure is quite different.
Zhu WF +6 more
europepmc +2 more sources
Phased array ultrasonic testing of micro-flaws in additive manufactured titanium block
Materials Research Express, 2020 While titanium components manufactured by additive manufacturing have been widely used in direct molding of complex components, their performance is strongly affected by existing internal flaws generated in the unique manufacturing process.
Xiaohui Wang +6 more
doaj +2 more sources
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 +5 more sources
Beamforming for hyperthermia treatment by training a weighted network of an ultrasonic array. [PDF]
Health Inf Sci Syst, 2017 Li FC +5 more
europepmc +3 more sources
Ultrasonic Arrays for Remote Sensing of Pasture Biomass [PDF]
Remote Sensing, 2019 The profitability of agricultural industries that utilise pasture can be strongly affected by the ability to accurately measure pasture biomass. Pasture height measurement is one technique that has been used to estimate pasture biomass. However, pasture height measurement errors can occur if the sensor is mounted to a farm vehicle that experiences ...
Mathew Legg, Stuart Bradley
openaire +3 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
doaj +1 more source
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
doaj +1 more source