Results 61 to 70 of about 2,754 (159)

Sparse-TFM Imaging of Lamb Waves for the Near-Distance Defects in Plate-Like Structures

Metals, 2019
The ultrasonic phased array total focusing method (TFM) has the advantages of high imaging resolution and high sensitivity to small defects. However, it has a long imaging time and cannot realize near-distance defect imaging, which limits its application
Haiyan Zhang, Yaqun Liu, Guopeng Fan, Hui Zhang, Wenfa Zhu, Qi Zhu   +5 more
doaj   +1 more source

Occluded Grape Cluster Detection and Vine Canopy Visualisation Using an Ultrasonic Phased Array. [PDF]

Sensors (Basel), 2021
Parr B, Legg M, Bradley S, Alam F.
europepmc   +1 more source

Crack Orientation and Depth Estimation in a Low-Pressure Turbine Disc Using a Phased Array Ultrasonic Transducer and an Artificial Neural Network

Sensors, 2013
Stress corrosion cracks (SCC) in low-pressure steam turbine discs are serious hidden dangers to production safety in the power plants, and knowing the orientation and depth of the initial cracks is essential for the evaluation of the crack growth rate ...
Wenshuang Chang, Shijiu Jin, Shili Chen, Xiaoxia Yang   +3 more
doaj   +1 more source

Sparse Total Focus Imaging of Rail Transit Rail Defects Based on Grey Wolf Algorithm

Chengshi guidao jiaotong yanjiu
[Objective] Using the ultrasonic phased array technology can realize high-precision imaging detection of rail transit rail defects. However, the widely used FMC-TFM (full matrix capture-total focusing method) has the disadvantages of long computation ...
Lubin QIAN, Hongbo WU, Chunxiang GAO, Zhengbo WEI, Yuhui XING   +4 more
doaj   +1 more source

A 2D Ultrasonic Phased Array Optimization Framework Enabled by Reconfigurable Laser Induced Phased Arrays

Journal of Physics: Conference Series
Abstract Three-dimensional (3D) ultrasonic imaging enables the viewing of internal features in a more accurate way than cross-sectional imaging. 3D imaging requires two-dimensional (2D) ultrasonic phased arrays to resolve all three spatial dimensions through beamforming along azimuthal and elevation angles.
Lukacs, Peter, Davis, Geo, Pieris, Don, Stratoudaki, Theodosia   +3 more
openaire   +3 more sources

Optimal Design of Sparse Matrix Phased Array Using Simulated Annealing for Volumetric Ultrasonic Imaging with Total Focusing Method

Sensors
The total focusing method (TFM) is often considered to be the ‘gold standard’ for ultrasonic imaging in the field of nondestructive testing. The use of matrix phased arrays as probes allows for high-resolution volumetric TFM imaging.
Dmitry Olegovich Dolmatov, Vadim Yurevich Zhvyrblya   +1 more
doaj   +1 more source

Instantaneous Phase Coherence Imaging for Near-Field Defects by Ultrasonic Phased Array Inspection. [PDF]

Sensors (Basel), 2020
Zhang H, Zeng L, Fan G, Zhang H, Zhu Q, Zhu W.   +5 more
europepmc   +1 more source

Application of Dual Focused Ultrasonic Phased Array Transducer in Two Orthogonal Cross-Sections for Inspection of Multi-Layered Composite Components of the Aircraft Fuselage. [PDF]

Materials (Basel), 2020
Raišutis R, Tumšys O.
europepmc   +1 more source

Application of Phased Array Ultrasound Flaw Detection Technology in Locomotive Integral Wheel Inspection

机车电传动, 2019
Based on the analysis of the application situation of locomotive integral wheel and the research of phased array technology, aiming at the structural characteristics and defect-prone areas of locomotive integral wheel, the application effect of phased ...
Jinlin ZHANG
doaj  

Ultrasonic Phased Array Compressive Imaging in Time and Frequency Domain: Simulation, Experimental Verification and Real Application. [PDF]

Sensors (Basel), 2018
Bai Z, Chen S, Jia L, Zeng Z.
europepmc   +1 more source