Results 11 to 20 of about 725 (150)
Surface-Wave Based Model for Estimation of Discontinuity Depth in Concrete. [PDF]
Sensors (Basel), 2018 In this paper, we propose an accurate and practical model for the estimation of surface-breaking discontinuity (i.e., crack) depth in concrete through quantitative characterization of surface-wave transmission across the discontinuity.
Ahn E +5 more
europepmc +3 more sources
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
Large‐scale system identification using self‐adaptive penguin search algorithm
IET Control Theory &Applications, Volume 17, Issue 17, Page 2292-2303, November 2023., 2023 This research addresses the non‐linear large‐scale system identification problem under the consideration of two systems: bilinear system and Volterra system as the large‐scale system identification. This work proposes a novel algorithm, called Self Adaptive Penguin Search Optimization (SAPeSO), to attain the system characteristics properly and minimize
Karthikeyan Udaichi +4 more
wiley +1 more source
Applicability Analysis of Inspection and Monitoring Technologies in Wind Turbine Towers
Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 Wind turbines are one of the key systems in wind energy development. The wind tower supporting the whole wind turbine is a towering structure, which has been affected by installation, transportation, environment, and other factors. Furthermore, it is prone to experience other quality problems that would be difficult to detect for wind turbine towers ...
Yanchao Yue +7 more
wiley +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
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
doaj +1 more source
Research progress in ultrasonic testing for friction stir welding of aluminum alloy
Cailiao gongcheng, 2022 The defects in friction stir welding (FSW) of aluminum alloy, e.g., tunnel defect, lack of penetration (LOP) and kissing bond, are with complex shape and narrow gap by inappropriate welding parameters.
JIN Shijie, TIAN Xin, LIN Li
doaj +1 more source
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
doaj +1 more source
Equivalent flaw time-of-flight diffraction sizing with ultrasonic phased arrays [PDF]
, 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.
Engle, Brady J. +2 more
core +3 more sources
Materials & Design, 2021 Automated in-process Non-Destructive Testing (NDT) systems are rapidly gaining traction within the manufacturing industry as they reduce manufacturing time and costs.
Ehsan Mohseni +12 more
doaj +1 more source