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Non-contact ultrasonic guided wave inspection of rails
SPIE Proceedings, 2013The University of California at San Diego (UCSD), under a Federal Railroad Administration (FRA) Office of Research and Development (R&D) grant, is developing a system for high-speed and non-contact rail integrity evaluation. A prototype using an ultrasonic air-coupled guided wave signal generation and air-coupled signal detection, in pair with a ...
Nguyen, T. V. +5 more
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Ultrasonic guided wave tomography for ice detection
Ultrasonics, 2016Of great concern for many structures, particularly critical sections of rotary and fixed wing aircrafts, is the ability to detect ice either on grounded or in-flight vehicles. As a consequence, some work is reported here that could be useful for a variety of different industries where ice formation is an important problem.
Xiang, Zhao, Joseph L, Rose
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Ultrasonic guided waves in bone
The Journal of the Acoustical Society of America, 2008Recent progress in quantitative ultrasound (QUS) has shown increasing interest towards measuring long bones by ultrasonic guided waves. This technology is widely used in the field of non-destructive testing and evaluation of different waveguide structures.
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Ultrasonic guided-waves characterization with warped frequency transforms
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2008Guided wave (GW) dispersion curves can be extracted from a time-transient measurement by means of timefrequency representations (TFRs). Unfortunately, any TFR is subject to the time-frequency uncertainty principle. This, in general, limits the capability of TFRs to characterize closely spaced guided modes over a wide frequency range.
DE MARCHI, LUCA +3 more
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Guided ultrasonic waves in composite cylinders
Mechanics of Composite Materials, 2007The ultrasonic nondestructive evaluation of composite cylinders requires a thorough understanding of the propagation of waves in these materials. In this paper, the propagation of flexural and longitudinal guided waves in fiber-reinforced composite (FRC) rods with transversely isotropic symmetry properties is studied.
F. Honarvar, E. Enjilela, A. N. Sinclair
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Flexible piezopolymer ultrasonic guided wave arrays
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2006Ultrasonic guided wave technology is being applied to a variety of gas and liquid transmission pipeline inspection applications. There are a variety of promising transduction techniques used to excite longitudinal, torsional, and flexural modes in pipe. Some of the more common methods include electromagnetic-acoustic, magnetostrictive, and piezoceramic
T.R. Hay, J.L. Rose
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Guided Wave Electromagnetic Ultrasonic Tomography
2019The defect of the aluminum plate concerned in this chapter is mainly the plate thickness loss-type defect caused by corrosion, and the plate thickness change caused by such defects is relatively flat. When Lamb waves encounter such defects, the amplitudes of other modal waves generated by modal transformation are relatively small.
Songling Huang +4 more
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Guided wave nuances for ultrasonic nondestructive evaluation
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2000Recent developments in guided wave generation, reception, and mode control show that increased penetration power and sensitivity are possible. A tone burst function generator and appropriate signal processing are generally used. Variable angle beam and comb-type transducers are the key to this effort.
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Ultrasonic guided wave tomography of pipes
2010 International Conference on Audio, Language and Image Processing, 2010Ultrasonic guided wave tomography has been shown to be an effective nondestructive evaluation technique for pipe-like structures. Guided waves propagating in pipe with damage are simulated using the finite element and the first arrival times of the received signals are extracted as input data of tomography.
Zhang Haiyan +3 more
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Ice detection by ultrasonic guided waves
CEAS Aeronautical Journal, 2018This paper describes a method for inflight ice detection using ultrasonic guided waves that is little studied until now. Unlike existing systems, the proposed method can immediately detect icing at the place of formation. The detection area can also include whole structural segments and the proposed sensor can be integrated into a wing structure ...
Mendig, Christian +5 more
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