Enhancing Time-of-Flight Diffraction (TOFD) Inspection through an Innovative Curved-Sole Probe Design [PDF]
SensorsTime-of-Flight Diffraction (TOFD) is a method of ultrasonic testing (UT) that is widely established as a non-destructive technique (NDT) mainly used for the inspection of welds.
Irati Sanchez Duo +3 more
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Towards an Alternative to Time of Flight Diffraction Using Instantaneous Phase Coherence Imaging for Characterization of Crack-Like Defects [PDF]
Sensors, 2021 Time of flight diffraction (TOFD) is considered a reliable non-destructive testing method for the inspection of welds using a pair of single-element probes.
Baptiste Gauthier +3 more
doaj +2 more sources
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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Broadband and High Sensitive Time-of-Flight Diffraction Ultrasonic Transducers Based on PMNT/Epoxy 1–3 Piezoelectric Composite [PDF]
Sensors, 2015 5–6 MHz PMNT/epoxy 1–3 composites were prepared by a modified dice-and-fill method. They exhibit excellent properties for ultrasonic transducer applications, such as ultrahigh thickness electromechanical coupling coefficient kt (85.7%), large ...
Dongxu Liu +8 more
doaj +2 more sources
Ultrasonic Time-of-Flight Diffraction Imaging Enhancement for Pipeline Girth Weld Testing via Time-Domain Sparse Deconvolution and Frequency-Domain Synthetic Aperture Focusing [PDF]
SensorsUltrasonic TOFD imaging, as an important non-destructive testing method, has a wide range of applications in pipeline girth weld inspection and testing.
Eryong Wu +4 more
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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
doaj +2 more sources
The Maximum Entropy Method in Ultrasonic Non-Destructive Testing—Increasing the Resolution, Image Noise Reduction and Echo Acquisition Rate [PDF]
Entropy, 2018 The use of linear methods, for example, the Combined Synthetic Aperture Focusing Technique (C–SAFT), does not allow one to obtain images with high resolution and low noise, especially structural noise in all cases. Non-linear methods should improve
Evgeny Gennadievich Bazulin
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Design and Validation of an Articulated Sensor Carrier to Improve the Automatic Pipeline Inspection [PDF]
Sensors, 2019 Pipeline inspection gauges (PIGs) carry out automatic pipeline inspection with nondestructive testing (NDT) technologies like ultrasound, magnetic flux leakage, and eddy current.
Antonio Ramirez-Martinez +4 more
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A Novel Method for Ultrasonic Evaluation of Horizontal Defects Using Time-of-Flight Diffraction [PDF]
Iranian Journal of Oil & Gas Science and Technology, 2014 Time-of-flight diffraction method (ToFD) is an amplitude-independent sizing method which is based on the measurement of time-of-flight of defect tip diffracted waves.
Parastoo Bagheri +3 more
doaj +1 more source
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
doaj +1 more source