Results 11 to 20 of about 3,455 (216)
TOFD Defect Image Recognition Based on YOLOv7
Journal of Physics: Conference Series, 2023 Abstract Welding technology is an important link in shipbuilding, and ultrasonic diffraction time difference method is one of its important inspection means, but the identification of its TOFD image still mainly relies on manual evaluation.
Xiongfang Fan +6 more
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Système de contrôle novateur basé sur la technique UT TOFD
e-Journal of Nondestructive Testing, 2023 Du fait de ses nombreux avantages en termes de facilité de mise en oeuvre, de vitesse d’examen, de performances de détection et de caractérisation des indications, la technique de contrôle TOFD (Time of Flight Diffraction) est de plus en plus utilisée ...
Michel Cence, Weina Ke, Celia Chevallier
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Machines, 2022 Ultrasonic time-of-flight diffraction (TOFD) is a non-destructive testing (NDT) technique for weld inspection that has gained popularity in the industry, due to its ability to detect, position, and size defects based on the time difference of the echo ...
Sulochana Subramaniam +2 more
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Chinese Journal of Mechanical Engineering, 2022 The shallow subsurface defects are difficult to be identified and quantified by ultrasonic time-of-flight diffraction (TOFD) due to the low resolution induced by pulse width and beam spreading.
Xu Sun, Li Lin, Shijie Jin
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Case Studies in Construction MaterialsTime-of-flight diffraction (TOFD) has been widely adopted for weld defect detection in bridge steel quality assurance due to its harmlessness to the human body, real-time performance, and satisfactory detection accuracy.
Yanfeng Gong +4 more
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CIVA as an Aid to Understanding TOFD Dead Zones
e-Journal of Nondestructive TestingTOFD (Time of Flight Diffraction) has been a popular ultrasonic testing method for many years. It has associated with it, limitations associated with the pulse duration.
Edward Ginzel
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Modeling of ultrasonic testing Time of Flight Diffraction (ToFD) technique by Finite Element Method [PDF]
مجله مدل سازی در مهندسی, 2015 Time-of-flight diffraction (ToFD) is an ultrasonic nondestructive testing technique used for detection, sizing and location of defects in industrial parts. This method has better abilities and benefits than other nondestructive testing techniques.
Somayeh Khorasani, Farhang Honarvar
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Impacts of parameterized orographic drag on the Northern Hemisphere winter circulation. [PDF]
J Adv Model Earth Syst, 2016 A recent intercomparison exercise proposed by the Working Group for Numerical Experimentation (WGNE) revealed that the parameterized, or unresolved, surface stress in weather forecast models is highly model-dependent, especially over orography.
Sandu I +6 more
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Non-contacted Permanent Magnetic Absorbed Wall-climbing Robot for Ultrasonic Weld Inspection of Spherical Tank [PDF]
MATEC Web of Conferences, 2019 A novel wall-climbing robot for the onsite weld inspecting of spherical tank with Time of Flight Diffraction (TOFD) method has been developed, in order to liberate operators from dangerous and heavy working environment.
Ding Yulin, Sun Zhenguo, Chen Qiang
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Multi-Mode Total Focusing Method (MTFM) to Detect High-Temperature Hydrogen Attack (HTHA) – A Review
Journal of Materials Exploration and Findings, 2023 High temperature hydrogen attack (HTHA) is a commonly observed harm component in carbon steels exposed to high temperature and pressure in a hydrogen-rich environment. Hydrogen together with carbon responds to produce methane.
Anjar Oktikawati +2 more
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