Results 141 to 150 of about 6,397,796 (189)
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Ultrasonic imaging in coarse-grained stainless steels by total focusing method
AIP Conference Proceedings, 2016In the present work, the Total Focusing Method (TFM) is used to image flaws in coarse-grained steels with a contact phased-array probe. In order to reduce the noise introduced by the heterogeneous structure, as well as artifacts due to surface guided waves, the Decomposition of the Time Reversal Operator method is performed before calculating TFM ...
Villaverde, E.L., Robert, S., Prada, C.
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The post-processing of ultrasonic array data using the total focusing method
Insight - Non-Destructive Testing and Condition Monitoring, 2004The use of ultrasonic arrays for NDT has increased significantly in recent years. This is due to the flexibility of array systems which can be electronically configured to produce plane, focused, steered and steer-focusedbeams. In this way, one array transducer can do the job of many standard single-element transducers.
Holmes, C, Drinkwater, BW, Wilcox, PD
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Total Focusing Method with Subsampling in Space and Frequency Domain for Ultrasound NDT
2019 IEEE International Ultrasonics Symposium (IUS), 2019In this paper, we present a compressed sensing model for 2D Full Matrix Capture data from a uniform linear array. Data is reconstructed via a matrix-free implementation of the Total Focusing Method (TFM) combined with the Fast Iterative Shrinkage/ Thresholding Algorithm.
Eduardo Perez +4 more
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Research on Detection of Weld Defects with Multi-Wave Total Focusing Method
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA), 2019In the modern industry, welded structures are widely used, especially in the aerospace and nuclear industries. In order to prevent accidents, defect detection must be performed. Due to the high anisotropy and non-uniformity in the soldered area, the signal-to-noise ratio(SNR) of the imaging defect is low and the image quality is poor.
Ping ZHANG +3 more
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Effects of array transducer inconsistencies on total focusing method imaging performance
NDT & E International, 2011The total focusing method (TFM) is a post-processing imaging algorithm for ultrasonic array data in which the array is synthetically focused at every image pixel. In this paper, the performance of the TFM imaging algorithm is examined in the presence of inter-element variability in the array, coupling and instrumentation.
Zhang, J, Drinkwater, BW, Wilcox, PD
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Implementation of total focusing method for phased array ultrasonic imaging on FPGA
SPIE Proceedings, 2015This paper describes a multi-FPGA imaging system dedicated for the real-time imaging using the Total Focusing Method (TFM) and Full Matrix Capture (FMC). The system was entirely described using Verilog HDL language and implemented on Altera Stratix IV GX FPGA development board.
JianQiang Guo +4 more
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, 2020
Full matrix capture coupled with total focusing method (FMC-TFM) is one of the most advanced and popular phased array ultrasonic techniques used to achieve simultaneous focusing at all depths in a specimen.
Sumana, Anish Kumar
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Full matrix capture coupled with total focusing method (FMC-TFM) is one of the most advanced and popular phased array ultrasonic techniques used to achieve simultaneous focusing at all depths in a specimen.
Sumana, Anish Kumar
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Simulation on qualitative detection of defects with multi-mode total focusing method
2018 IEEE Far East NDT New Technology & Application Forum (FENDT), 2018Multi-mode total focusing method (TFM) is applied to overcome the limitation that defect type is difficult to be accurately determined with conventional ultrasonic testing. The phased array transducer connected with wedge is employed to implement electronic scan and receive the multiple reflected waves generated from defect surface.
Shijie Jin +3 more
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Total focusing method for non destructive evaluation: Toward real-time imaging systems
2013 IEEE 56th International Midwest Symposium on Circuits and Systems (MWSCAS), 2013This paper describes a dedicated architecture for real-time imaging using the Total Focusing Method (TFM) and an advanced acquisition technique called the Full Matrix Capture (FMC). The architecture was entirely described using VHDL language and implemented on a V5FX70T Xilinx FPGA for the control part and a V5SX95T Xilinx FPGA for the acquisition part.
Njiki, Mickael +4 more
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AIP Conference Proceedings, 2015
In this paper, we propose an ultrasonic adaptive imaging method based on the phased-array technology and the synthetic focusing algorithm Total Focusing Method (TFM). The general principle is to image the surface by applying the TFM algorithm in a semi-infinite water medium.
Le Jeune, L. +4 more
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In this paper, we propose an ultrasonic adaptive imaging method based on the phased-array technology and the synthetic focusing algorithm Total Focusing Method (TFM). The general principle is to image the surface by applying the TFM algorithm in a semi-infinite water medium.
Le Jeune, L. +4 more
openaire +1 more source