Results 251 to 260 of about 5,447,906 (320)

Progress in the Reliable Detection of Near-Surface Reflectors when Inspecting Anisotropic and Isotropic Material Using the Total Focusing Method

Insight - Non-Destructive Testing and Condition Monitoring, 2023
Load-bearing components made of composite laminates of several centimetres in thickness, for example those used in wind turbine blades, are frequently used in the energy sector. These components are usually tested using conventional ultrasound techniques.
L. Bergbreiter, J. Grager, A. Narr, H. Mooshofer, C. Grosse   +4 more
semanticscholar   +1 more source

A Circular Total Focusing Method With Eccentricity Correction and Intensity Compensation for Endoscopic Ultrasound Imaging of Dual-Layered Media

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2023
Present endoscopic ultrasound (EUS) imaging methods for circular array (CA) suffer from the nonuniform spatial resolution in the imaging of a dual-layered media, such as the tubes’ immersion EUS inspection.
Ze Xi, Xiaowei Luo, Yahui Peng, Xiangang Wang   +3 more
semanticscholar   +1 more source

Fast total focusing method for ultrasonic imaging

2015 IEEE International Ultrasonics Symposium (IUS), 2015
This work deals with advanced and fast imaging techniques using phased array probes for non destructive evaluation or medical imaging. These methods employ a large amount of summations in order to focus at each pixel of the reconstruction image, which often represent a prohibitive computational cost. We present two acceleration methods, i.e.
Ewen Carcreff, Gavin Dao, Dominique Braconnier   +2 more
openaire   +1 more source

Fast total focusing method by a migration approach

2015 IEEE Far East NDT New Technology & Application Forum (FENDT), 2015
The Total Focusing method is an efficient approach to perform ultrasonic imaging of industrial components. It consists in focusing at each point of a reconstruction area by applying coherent summations. The main issue of this method is the computation time which makes real-time imaging difficult for large images.
Ewen Carcreff, Guiyang Lv, Dominique Braconnier   +2 more
openaire   +1 more source

Ultrasonic Phased Array Detection of Crack-Like Defects in Welds Based on Multi-Mode Total Focusing Method

Volume 6: Operations, Applications, & Components, 2023
As a critical structural component within pressure vessels, weld can be frequently found with harmful defects during service, such as microcracks with different orientations.
Yangguang Bu, Zhichao Fan, X. Chen, Jingwei Cheng, Wei Chen, Zhe Wang, Haibin Wang   +6 more
semanticscholar   +1 more source

Use of the Total Focusing Method with the Envelope Feature

Materials Evaluation, 2020
This paper presents how to compute the envelope of a total focusing method (TFM) image and the benefits of using this TFM envelope as part of a code-compliant solution. The TFM envelope is obtained by computing the norm of two different TFM images; namely, a first TFM image computed using the standard acquired full matrix capture (FMC), and a second ...
Nicholas Badeau, Guillaume Painchaud-April, Alain Le Duff   +2 more
openaire   +1 more source

Lamb Wave Based Total Focusing Method for Integral Grid-Stiffened Plate Damage Identification

IEEE Sensors Journal, 2022
The integral grid-stiffened plate is often used as the outer wall structure of spacecraft, which can reduce weight and increase strength. The Lamb wave is often used to detect damage of plate structure due to its advantages of strong penetration and ...
Sunquan Yu, Chengguang Fan, Yong Zhao, Lei Chen, Bin Gao, Lei Yang   +5 more
semanticscholar   +1 more source

A Study of Total Focusing Method for Ultrasonic Nondestructive Testing

Journal of Testing and Evaluation, 2013
Abstract Commercial ultrasonic phased array (PA) systems can perform multiple inspections in real-time using array transducers. This approach involves firing array elements in a particular sequence to produce high-resolution images at a high frame rate with excellent signal-to-noise ratio (SNR).
Po-Yen Tseng, Young-Fo Chang, Chao-Ming Lin, Wei-Jen Nien, Chih-Hsiung Chang, Chih-Chung Huang   +5 more
openaire   +1 more source

Total Focusing Method with Laser-Generated Ultrasonic Waves for Defect Detection in Finite Plates

ASNT 30th Research Symposium Conference Proceedings, 2022
Total Focusing Method (TFM) was employed using laser-generated ultrasonic plate waves. The goal was to assess the feasibility of using this technique for applications where testing constraints necessitate couplant-free, remote, guided-wave conditions ...
Megan E. McGovern, Dmitriy D. Bruder, R. James, V. Gattani   +3 more
semanticscholar   +1 more source

Effects of directivity function on total focusing method imaging performance

2014 IEEE Far East Forum on Nondestructive Evaluation/Testing, 2014
The Total Focus Method (TFM) is a post-processing algorithm which uses all elements in the array to focus in both transmission and reception at every image point. The time-domain signals is captured in a process termed Full Matrix Capture (FMC). In this paper, the main objective is to research the effects of directivity function on the TFM.
null Xiang Zhou, null Jian-ping Peng, null Lin Luo, null Ze-yong Wang, null Xiao-rong Gao   +4 more
openaire   +1 more source