Results 161 to 170 of about 3,511 (220)
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Untersuchungen mit TOFD an geschweißten Längsnahtproben
Materials Testing, 2000Weld examination on Tube Test Specimen using TOFD. In contrast to the pulse echo technique, which is based on the sound field reflection at the flaw surface, the Time of Flight Diffraction (TOFD) technique uses the diffraction of the sound field at the flaw tips.
Gerhard Brekow, Anton Erhard
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Research on ultrasonic TOFD scanning image weld defect detection method based on PyTorch
International Conference on Signal Processing and Computer Science, 2023In order to overcome the shortcomings of low efficiency and subjective factors in manually analyzing and evaluating weld defect images obtained by the ultrasonic TOFD method.
Yu Chen +4 more
semanticscholar +1 more source
A metrological approach to the time of flight diffraction method (ToFD)
Measurement: Journal of the International Measurement Confederation, 2021Introduction Non-Destructive Testing (NDT) is widely used in industry, especially in the evaluation of mechanical parts and structures for identifying defects, corrosion, flaws or imperfections.
R. Mayworm, A. Alvarenga, R. Costa-Felix
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Weld TOFD defect classification method based on multi-scale CNN and cascaded focused attention
Journal of Manufacturing ProcessesDonglin Tang +3 more
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Automatic Recognition of Welding Seam Defects in TOFD Images Based on TensorFlow
Automatic Control and Computer Sciences, 2022Shuohui Chen +4 more
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Development of Assisted Software for TOFD Testing
Applied Mechanics and Materials, 2012The detection of flaws is essential as the defects of pipes and containers affect the safe operation of many kinds of equipment. During the industrial production process, it is usually use the ray method to detect the flaws which has radiant effect on the testing personnel.
Qing He, Ze Yue Pan, Yu Ning Zhang
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Experimental study on TOFD technology in weld nondestructive testing of aluminum pressure equipment
Journal of Physics: Conference SeriesAt present, there is a lack of practical application cases of TOFD technology for Aluminum Pressure Equipment Welds in China, and there are no relevant national standards and industry standards on the application of TOFD technology in aluminum pressure ...
Fei Qiu, Mao Chen, Guogen Huang
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Дефектоскопия, 2023
A technique was developed and tested for selecting beam steering and focusing methods for mechanized ultrasonic testing of circumferential welds of pipelines up to 16 mm thick using phased antenna arrays.
D. A. Ajibaye +2 more
semanticscholar +1 more source
A technique was developed and tested for selecting beam steering and focusing methods for mechanized ultrasonic testing of circumferential welds of pipelines up to 16 mm thick using phased antenna arrays.
D. A. Ajibaye +2 more
semanticscholar +1 more source
AIP Conference Proceedings, 2001
We applied laser ultrasound for the time of flight diffraction (TOFD) measurement. To find an effective testing condition of TOFD method, laser ultrasonic transmission around the slit in glass specimens was observed using the photoelastic ultrasonic visualization system. After the observation we constructed the laser TOFD system and applied to the slit
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We applied laser ultrasound for the time of flight diffraction (TOFD) measurement. To find an effective testing condition of TOFD method, laser ultrasonic transmission around the slit in glass specimens was observed using the photoelastic ultrasonic visualization system. After the observation we constructed the laser TOFD system and applied to the slit
openaire +1 more source
Reducing Dead Zone in Ultrasonic Time-of-Flight Diffraction (TOFD): A Review
Russian Journal of Nondestructive TestingShijie Jin, Xu Sun, zhongbing luo
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