Results 31 to 40 of about 296 (144)

Defect recognition of circumferential welds of pipelines in TOFD images based on YOLOv5

Hanjie xuebao
In order to enhance defect recognition in time-of-flight diffraction (TOFD) scan images for circumferential welds of pipelines under conditions such as background signal interference and uneven sample distribution, an improved YOLOv5s network model was ...
Cheng XU, Shihao DONG, Zhengyu OU, Zandong HAN   +3 more
doaj   +1 more source

Time of flight diffraction and imaging (TOFDI) combining B- scans and cross-sectional imaging

, 2011
Time of Flight Diffraction and Imaging (ToFDI), based on Time of Flight Diffraction (ToFD), uses a sparse transducer array (laser-EMAT for non-contact applications), and adds an imaging stage based on multiple wave mode (and mode-converted) ultrasound ...
Dixon, S., Donald O. Thompson, Dale E. Chimenti, S. Dixon, P. A. Petcher, Petcher, P. A.   +5 more
core   +1 more source

Approaching code-compliant Non-Destructive Testing of carbon steel weld using Total Focusing Method technique

e-Journal of Nondestructive Testing
The Total Focusing Method (TFM) technique is an advanced Non-Destructive Testing (NDT) Ultrasonic Testing (UT) technique. It is usually used together with special acquisition configurations such as Full Matrix Capture (FMC) or Plane Wave Imaging (PWI ...
Wang Ke, Weina Ke
doaj   +1 more source

Immersion and TOFD

, 2011
Time of flight diffraction (TOFD) is a well-developed ultrasonic non-destructive testing (NDT) technique which has been applied successfully for accurate sizing of defects in thick sections.
Subbaratnam, R., Baldev Raj,, Abraham, Saju T.   +2 more
core   +1 more source

Equivalent flaw time-of-flight diffraction sizing with ultrasonic phased arrays

, 2012
Ultrasonic phased array transducers can be used to extend traditional time-of-flight diffraction (TOFD) crack sizing, resulting in more quantitative information about the crack being obtained.
Brady J. Engle, Schmerr, Lester, Alexander Sedov, Engle, Brady, Sedov, Alexander, Lester W. Schmerr Jr   +5 more
core   +1 more source

Highly Sensitive Phased Array Probes based on Capacitive Micromachined Ultrasonic Transducers

e-Journal of Nondestructive Testing
Capacitive Micromachined Ultrasonic Transducers (CMUTs) offer a wide freedom of design for ultrasonic phased arrays. They are characterized, in comparison to piezoelectric transducers, by a higher sensitivity in receiving and a wider bandwidth based on ...
Uwe Voelz, Marco Kircher, Sandro G. KOCH, Marcel Krenkel   +3 more
doaj   +1 more source

Time of flight diffraction and imaging (TOFDI) [PDF]

Time of flight diffraction and imaging (TOFDI) is based on time of flight diffraction (TOFD), adding cross-sectional imaging of the sample bulk by exploiting the scattering of ultrasonic waves from bulk defects in metals.
Petcher, P. A.
core  

Corrosion of API 5L X60 Pipeline Steel in Soil and Surface Defects Detection by Ultrasonic Analysis

Metals
The corrosion steels phenomenon is one of the main problems in the oil industry, such as in buried transmission pipelines used for high gas pressure for long distances.
Fatima Benkhedda, Ismail Bensaid, Abderrahim Benmoussat, Sid Ahmed Benmansour, Abdeldjelil Amara Zenati   +4 more
doaj   +1 more source

Finite difference time domain simulation of the time-of-flight diffraction technique for imaging and sizing cracks

, 2007
This paper reports on the numerical simulations of the Time-of-Flight Diffraction (TOFD) technique to image and size cracks in plate specimens, using the Finite Difference Time Domain (FDTD) method for modelling the ultrasonic wave propagation ...
Balasubramanian, Krishnan, Krishnamurthy, C V, Satyanarayan, L   +2 more
core   +1 more source

PA+TOFD testing by automated UT systems – implementation and applications —

, 2022
Celem referatu jest prezentacja prac wdrożeniowych automatycznych systemów ultradźwiękowych PA+TOFD, dedykowanych do badania doczołowych złączy spawanych o zakresie grubości od 6 do 40 mm na obiektach ze stali węglowych - płaskich oraz na rurociągach w ...
Śliwowski, Marek
core   +1 more source