Results 11 to 20 of about 934,305 (288)

Application of conformal map theory for design of 2-D ultrasonic array structure for ndt imaging application : a feasibility study [PDF]

open access: yes, 2014
Two-dimensional ultrasonic phased arrays are becoming increasingly popular in nondestructive evaluation (NDE). Sparse array element configurations are required to fully exploit the potential benefits of 2-D phased arrays. This paper applies the conformal
Ramadas, Sivaram Nishal   +4 more
core   +4 more sources

An annular array with fiber composite microstructure for far field NDT imaging applications [PDF]

open access: yes, 2010
This paper describes the design and fabrication of a reduced element count annular array for far field NDT imaging applications, built with a random fiber piezoelectric composite microstructure.
Dziewierz, J.   +5 more
core   +4 more sources

Simulation of the influence of hydrophones used for the characterization of pressure field distribution in low frequency, high power ultrasonic reactor vessels [PDF]

open access: yes, 2007
This paper describes the use of a finite element (FE) modeling approach to investigate the influence of different hydrophone designs in laboratory scale reactor vessels.
O'Leary, R.L., Harvey, G., Gachagan, A.
core   +4 more sources

Evaluation of chromosomal abnormalities and copy number variations in fetuses with ultrasonic soft markers

open access: yesBMC Medical Genomics, 2021
Background Some ultrasonic soft markers can be found during ultrasound examination. However, the etiology of the fetuses with ultrasonic soft markers is still unknown.
Meiying Cai   +6 more
doaj   +1 more source

A dynamic coal quantity detection system for conveyor belt based on ultrasonic array

open access: yesGong-kuang zidonghua, 2023
Dynamic coal quantity detection for conveyor belt is the foundation and key to achieving energy consumption optimization measures for multi-stage belt conveyors such as coal flow starting and automatic speed regulation.
HAO Hongtao, WANG Kai, DING Wenjie
doaj   +1 more source

Pulse Peak Delay-Total Focusing Method for Ultrasonic Tomography on Concrete Structure

open access: yesApplied Sciences, 2021
An ultrasonic array device like the A1040 MIRA is used to non-destructively visualize the inside of concrete structures. A data set acquired by the ultrasonic array device is so unfocused that an image reconstruction algorithm is required to transform ...
Hungjoo Kwon   +2 more
doaj   +1 more source

Measurement of a 3D Ultrasonic Wavefield Using Pulsed Laser Holographic Microscopy for Ultrasonic Nondestructive Evaluation

open access: yesSensors, 2018
In ultrasonic array imaging, 3D ultrasonic wavefields are normally recorded by an ultrasonic piezo array transducer. Its performance is limited by the configuration and size of the array transducer.
Xing Wang   +4 more
doaj   +1 more source

Parameter optimization method for delamination defects detection of composite laminate using phased array ultrasonic

open access: yesCailiao gongcheng, 2020
Aiming at the problem of accurate identification of delamination defects of composite laminates, an optimization method of activation aperture of phased array ultrasonic testing was proposed by simulation and experiment, and the effects of the activation
CAO Hong-yi   +6 more
doaj   +1 more source

A modular FPGA-based ultrasonic array system for applications including non-destructive testing [PDF]

open access: yes, 2008
This paper reports work aimed at the development of an ultrasonic imaging system comprising modular, reprogrammable building blocks, or tiles, which can be customised for multiple applications, including and within non-destructive testing (NDT), by the ...
Afroukh, F.   +6 more
core   +1 more source

MOSAIC: An integrated ultrasonic 2-D array system [PDF]

open access: yes, 2007
An investigation into the development of an ultrasound imaging system capable of customization for multiple applications via the tessellation of in-system programmable scalable modules, or tiles, is presented here.
D.R.S. Cumming   +9 more
core   +1 more source

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