Results 11 to 20 of about 18,542,829 (238)

Ultrasonic Total Focusing Imaging Method of Multilayer Composite Structures Using the Root-Mean-Square (RMS) Velocity

Advances in Materials Science and Engineering, 2021
Multilayer composite structures have been widely used in industrial manufacturing, and nondestructive testing of these multilayer structures is to ensure their reliable quality and performance.
Xufei Guo, Yan Han
doaj   +2 more sources

Extensional flow of Newtonian and Boger fluids through a flow focusing microdevice [PDF]

, 2011
This paper was presented at the 3rd Micro and Nano Flows Conference (MNF2011), which was held at the Makedonia Palace Hotel, Thessaloniki in Greece.
Alves, MA, Pinho, FT, Oliveira, MSN, 3rd Micro and Nano Flows Conference (MNF2011)   +3 more
core   +6 more sources

Locally Optimal Subsampling Strategies for Full Matrix Capture Measurements in Pipe Inspection

Applied Sciences, 2021
In ultrasonic non-destructive testing, array and matrix transducers are being employed for applications that require in-field steerability or which benefit from a higher number of insonification angles.
Fabian Krieg, Jan Kirchhof, Eduardo Pérez, Thomas Schwender, Florian Römer, Ahmad Osman   +5 more
doaj   +1 more source

Wrinkle Detection in Carbon Fiber-Reinforced Polymers Using Linear Phase FIR-Filtered Ultrasonic Array Data

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, Yang Li, Zhenggan Zhou, Jia Meng   +3 more
doaj   +1 more source

Automated Classification of Pipeline Defects from Ultrasonic Phased Array Total Focusing Method Imaging

Energies, 2022
The defects in the welds of energy pipelines have significantly influenced their safe operation. The inefficient and inaccurate detection of the defects may give rise to catastrophic accidents.
Haibin Wang, Zhichao Fan, Xuedong Chen, Jingwei Cheng, Wei Chen, Zhe Wang, Yangguang Bu   +6 more
doaj   +1 more source

Secondary Interface Echoes Suppression for Immersion Ultrasonic Imaging Based on Phase Circular Statistics Vector

Sensors, 2023
Immersion ultrasonic phased array imaging technology offers great advantages, particularly in coupling and automatic detection of industrial non-destructive testing (NDT).
Ming Chen, Zhenghui Xiong, Yan Jing, Xi He, Qingru Kong, Yao Chen   +5 more
doaj   +1 more source

Sound Field Modeling Method and Key Imaging Technology of an Ultrasonic Phased Array: A Review

Applied Sciences, 2022
An ultrasonic phased array consists of multiple ultrasonic probes arranged in a certain regular order, and the delay time of the excitation signal sent to each array element is controlled electronically.
Qian Xu, Haitao Wang
doaj   +1 more source

Supporting Imaging of Austenitic Welds with Finite Element Welding Simulation—Which Parameters Matter?

Applied Sciences, 2023
The basic principle of ultrasound is to relate the time of flight of a received echo to the location of a reflector, assuming a known and constant velocity of sound.
Michał K. Kalkowski, Zoltán Bézi, Michael J. S. Lowe, Andreas Schumm, Bernadett Spisák, Szabolcs Szavai   +5 more
doaj   +1 more source

On Dispersion Compensation for GAW-Based Structural Health Monitoring

Sensors, 2023
Guided acoustic waves (GAW) have proven to be a useful tool for structural health monitoring (SHM). However, the dispersive nature of commonly used Lamb waves compromises the spatial resolution making it difficult to detect small or weakly reflective ...
Alexander Backer, Viktor Fairuschin, Klaus Stefan Drese   +2 more
doaj   +1 more source

Camera focusing based on fringe pattern matching [PDF]

, 1997
A method of camera focusing based on fringe pattern matching is presented. In the method, the variance of the mismatch function is used as a focus measure.
Bryanston-Cross, P., Wang, Zuobin
core   +1 more source