Results 111 to 120 of about 6,397,796 (189)

An optimized total focusing method based on delay-multiply-and-sum for nondestructive testing

Ultrasonics, 2023
Total focusing method (TFM) attracts much interest because of high image resolution and large inspection coverage. However, the synthetic focusing approach based on delay-and-sum beamforming employs only the defect information contained in the dataset while ignoring the spatial information of the array signals, leading to limited imaging performance ...
Lishuai Liu, Fu-Zhen Xuan, Yanxun Xiang   +2 more
exaly   +4 more sources

Ultrasonic total focusing method for internal defects in composite insulators

Insight - Non-Destructive Testing and Condition Monitoring
In order to address the problem of poor imaging detection of internal defects caused by the multi-layer curved surface structure and strongly attenuating material of composite insulators, the total focusing method (TFM) with two-layer curved surface correction was investigated.
Hongwei Hu, Jinhan Huang, Duo Lyu, Wenzheng Liu, Xiaoqiang Xu   +4 more
openaire   +2 more sources

Electromagnetic Acoustic Damage Imaging Using Compressive Sensing and Total Focusing Method

IEEE Transactions on Instrumentation and Measurement
The total focusing method (TFM) is widely used in ultrasonic imaging [by means of piezoelectric transducers (PZTs)] due to its inherent nature of high precision.
Xiaofei Huang, Yuedong Xie, Fulu Liu, Lijun Xu 0001   +3 more
openaire   +2 more sources

Acoustic Path Filtering for Improved Multimode Total Focusing Method Inspection

Materials Evaluation, 2023
Total focusing method (TFM) is an ultrasonic testing (UT) technique that provides nondestructive testing (NDT) inspectors with new imaging modes, enabling more accurate detection, sizing, and representation of challenging defects. While TFM may offer convenient, nearly true-to-geometry imagery as the inspection result, it is often detrimentally ...
Benoit Lepage, Guillaume Painchard-April
openaire   +2 more sources

Total focusing method applied to probability of detection

The International Journal of Advanced Manufacturing Technology, 2023
Mohammad Ebrahim Bajgholi, Gilles Rousseau, Edward Ginzel, Denis Thibault, Martin Viens   +4 more
openaire   +2 more sources

Accelerating Algorithm for Total Focusing Method Imaging Based on Optimization of Full Matrix Data

Russian Journal of Nondestructive Testing, 2023
Junhan Li, Shaofeng Wang, Xin Mao, Wenjing Liu, Hailing Wang, Shengrong Zhou   +5 more
exaly   +2 more sources

Virtual source total focusing method for crack detection in complex curved structure

NDT and E International, 2023
Wenbin Zhou, Zhenggan Zhou
exaly   +2 more sources

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

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