Results 201 to 210 of about 2,905,814 (268)
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Lamb Wave Frequency Diverse Array
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2022The imaging method based on the conventional phased array (PA) can only realize angle focusing. To break through the above limitations, frequency diverse array (FDA) is first introduced from radar to Lamb wave, which opens up a possibility to realize angle-range focusing in damage localization. The energy pattern of FDA without considering the features
Yanfeng Lang +3 more
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Lamb wave propagation method for nondestructive characterization of the elastic properties of wood
, 2021Nondestructive evaluation (NDE) of the mechanical properties of structural wood is of great importance for quality control purposes in wood industries and construction applications. The currently used ultrasonic and stress wave methods fail to accurately
H. Fathi, S. Kazemirad, Vahid Nasir
semanticscholar +1 more source
Ultrasonics, 2020
Lamb wave is widely recognized as one of the most encouraging tools for structural health monitoring (SHM) systems. In spite of many favourable characteristics of Lamb wave for SHM, real-world application of these systems is still quite limited.
Rahim Gorgin, Ying Luo, Zhanjun Wu
semanticscholar +1 more source
Lamb wave is widely recognized as one of the most encouraging tools for structural health monitoring (SHM) systems. In spite of many favourable characteristics of Lamb wave for SHM, real-world application of these systems is still quite limited.
Rahim Gorgin, Ying Luo, Zhanjun Wu
semanticscholar +1 more source
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1998
Lamb waves are extensively involved in plate structure inspection because of their guided nature. However, their dispersive nature often limits their use in flaw detection. In this paper we show that the use of a time-reversal mirror (TRM) allows to automatically compensate for the dispersive nature of Lamb waves.
R K, Ing, M, Fink
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Lamb waves are extensively involved in plate structure inspection because of their guided nature. However, their dispersive nature often limits their use in flaw detection. In this paper we show that the use of a time-reversal mirror (TRM) allows to automatically compensate for the dispersive nature of Lamb waves.
R K, Ing, M, Fink
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A Bayesian fusion method for composite damage identification using Lamb wave
Structural Health Monitoring, 2020This study presents a novel method for composite damage identification using Lamb wave. A probabilistic integration of the elliptical loci method and the RAPID (reconstruction algorithm for probabilistic inspection of defects) in a Bayesian framework is ...
Haode Huo, Jingjing He, Xuefei Guan
semanticscholar +1 more source
IEEE Symposium on Ultrasonics, 2002
Tomographic imaging of the condition of tin materials has been performed using Lamb waves. Lamb waves were generated in thin sheets of aluminum submerged in water using an immersion transducer set at the critical angle. An identical transducer at a fixed separation detected energy radiated back into the water by the propagating Lamb wave.
D.P. Jansen, D.A. Hutchins
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Tomographic imaging of the condition of tin materials has been performed using Lamb waves. Lamb waves were generated in thin sheets of aluminum submerged in water using an immersion transducer set at the critical angle. An identical transducer at a fixed separation detected energy radiated back into the water by the propagating Lamb wave.
D.P. Jansen, D.A. Hutchins
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, 2020
In order to study the application of ultrasonic Lamb wave in the detection of defective plates, a nonlinear Lamb wave detection system was established.
Hanxin Chen +4 more
semanticscholar +1 more source
In order to study the application of ultrasonic Lamb wave in the detection of defective plates, a nonlinear Lamb wave detection system was established.
Hanxin Chen +4 more
semanticscholar +1 more source
Ultrasonic Lamb wave diffraction tomography
Ultrasonics, 2001Ultrasonic guided waves, Lamb waves, allow large sections of aircraft structures to be rapidly inspected. Unlike conventional ultrasonic C-scan imaging that requires access to the whole inspected area, tomographic algorithms work with data collected over the perimeter.
E V, Malyarenko, M K, Hinders
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Lamb Wave Multitouch Ultrasonic Touchscreen
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2016Touchscreen sensors are widely used in many devices such as smart phones, tablets, and laptops with diverse applications. We present the design, analysis, and implementation of an ultrasonic touchscreen system that utilizes the interaction of transient Lamb waves with objects in contact with the screen. It attempts to improve on the existing ultrasound
Kamyar Firouzi +3 more
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Air-coupled Lamb wave tomography
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1997An entirely air-coupled inspection system using a pair of micromachined silicon capacitance transducers has been used to image defects in thin plates of different materials (0.7 mm to 2.22 mm thick) using air-coupled Lamb wave tomography. A filtered back projection algorithm was used in a form of difference tomography to reconstruct images of defects ...
W, Wright +3 more
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