Results 71 to 80 of about 115,036 (200)

High Performance Relaxor-Based Ferroelectric Single Crystals for Ultrasonic Transducer Applications

Sensors, 2014
Relaxor-based ferroelectric single crystals Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) have drawn much attention in the ferroelectric field because of their excellent piezoelectric properties and high electromechanical coupling coefficients (d33~2000 pC/N, kt~60%)
Yan Chen, Kwok-Ho Lam, Dan Zhou, Qingwen Yue, Yanxiong Yu, Jinchuan Wu, Weibao Qiu, Lei Sun, Chao Zhang, Haosu Luo, Helen L. W. Chan, Jiyan Dai   +11 more
doaj   +1 more source

Leak Detection in Spacecraft Using a 64-Element Multiplexed Passive Array to Monitor Structure-Borne Noise [PDF]

, 2005
We demonstrate an array sensor method intended to locate leaks in manned spacecraft using leak‐generated, structure‐borne ultrasonic noise. We have developed and tested a method for sensing and processing leak noise to reveal the leak location involving ...
Chimenti, Dale, Holland, Stephen, Holland, Stephen, Roberts, Ronald, Song, Junho   +4 more
core   +2 more sources

Full matrix capture and the total focusing imaging algorithm using laser induced ultrasonic phased arrays [PDF]

, 2016
Laser ultrasonics is a technique where lasers are used for the generation and detection of ultrasound instead of conventional piezoelectric transducers.
Clark, Matt, Stratoudaki, Theodosia, Wilcox, Paul D.   +2 more
core   +3 more sources

Toroidally focused sensor array for real-time laser-ultrasonic imaging: The first experimental study

Photoacoustics, 2020
In this paper we report on the first toroidally focused 2D real-time laser-ultrasonic imaging system and a modified filtered back projection algorithm that can be used in the region near the waist of the astigmatic laser-ultrasonic probe beam. The system
Anton Bychkov, Varvara Simonova, Vasily Zarubin, Igor Kudinov, Elena Cherepetskaya, Alexander Karabutov   +5 more
doaj   +1 more source

Research progress of automated ultrasonic imaging detection technology for complex aircraft components

Journal of Aeronautical Materials
Traditional ultrasonic automated non-destructive testing is a great challenge in the inspection of aviation components with complex surfaces. Complex surfaces can interfere with the formation of the focus in the sound beam，and the waveform transformation
CHEN Yao, XIONG Zhenghui, LUO Junwei, WANG Hanyang, YUAN Jinzhao, LU Chao   +5 more
doaj   +1 more source

A wireless ultrasonic NDT sensor system [PDF]

, 2005
Ultrasonic condition monitoring technologies have been traditionally utilized in industrial and construction environments where structural integrity is of concern.
Benny, C.G., Hayward, G., McNab, A., Steel, K.   +3 more
core  

LENS ACOUSTIC MICROSCOPE WITH A LINEAR ARRAY FOR QUANTITATIVE CHARACTERIZATION OF LAYERED OBJECTS

Российский технологический журнал, 2016
In this paper, the acoustic microscope with a linear ultrasonic array and a cylindrical lens has been proposed in order to carry out quantitative characterization of layered regions of the sample under research.
S. A. Titov, R. G. Maev, A. N. Bogachenkov   +2 more
doaj   +1 more source

2-D Ultrasonic Array-Based Optical Coherence Elastography. [PDF]

IEEE Trans Ultrason Ferroelectr Freq Control, 2021
Kang H, Qian X, Chen R, Wodnicki R, Sun Y, Li R, Li Y, Shung KK, Chen Z, Zhou Q.   +9 more
europepmc   +1 more source

Laser Scanning Guided Localization Imaging with a Laser-Machined Two-Dimensional Flexible Ultrasonic Array. [PDF]

Micromachines (Basel), 2022
Chen J, Liu W, Gu D, Wu D.
europepmc   +1 more source

Positioning and Imaging Detection of Corona Discharge in Air with Double Helix Acoustic Sensors Array

Energies, 2017
Corona discharge could be a serious hazard to the outdoor insulation of a high-voltage (HV) system and also is an important detection issue for insulation status diagnosis.
Ming Dong, Ao Ma, Ming Ren, Chongxing Zhang, Jiacheng Xie, Ricardo Albarracín   +5 more
doaj   +1 more source