Modelling of a novel high-impedance matching layer for high frequency (>30 MHz) ultrasonic transducers [PDF]
, 2013 This work describes a new approach to impedance matching for ultrasonic transducers. A single matching layer with high acoustic impedance of 16 MRayls is demonstrated to show a bandwidth of around 70%, compared with conventional single matching layer ...
Harris, N.R., Qian, Yi Chen
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Investigating the thermal stability of 1-3 piezoelectric composite transducers by varying the thermal conductivity and glass transition temperature of the polymeric filler material [PDF]
, 2002 The thermal behaviour of a number of 1-3 piezoelectric composite transducers is discussed. In particular, devices manufactured from a polymer filler with a relatively high glass to rubber transition temperature (T-g), and from polymer systems with ...
Hayward, G. +6 more
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Research and Modeling of Mechanical Crosstalk in Linear Arrays of Ultrasonic Transducers
Archives of Acoustics, 2016 Linear arrays of ultrasonic transducers are commonly used as ultrasonic probes in medical diagnostics for imaging the interior of a human body in vivo. The crosstalk phenomenon occurs during the operation of transducers in which electrical voltages and ...
Mateusz CELMER, Krzysztof J. OPIELIŃSKI
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Harmonic analysis of lossy piezoelectric composite transducers using the plane wave expansion method [PDF]
, 2008 Periodic composite ultrasonic transducers oer many advantages but the periodic pillar architecture can give rise to unwanted modes of vibration which interfere with the piston like motion of the fundamental thickness mode.
Hayward, G. +9 more
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Simulation of ultrasonic lamb wave generation, propagation and detection for an air coupled robotic scanner [PDF]
, 2011 A computer simulator, to facilitate the design and assessment of a reconfigurable, air-coupled ultrasonic scanner is described and evaluated. The specific scanning system comprises a team of remote sensing agents, in the form of miniature robotic ...
Keith Worden +13 more
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A noncontact ultrasonic platform for structural inspection [PDF]
, 2011 Miniature robotic vehicles are receiving increasing attention for use in nondestructive testing (NDE) due to their attractiveness in terms of cost, safety, and their accessibility to areas where manual inspection is not practical. Conventional ultrasonic
Summan, Rahul +9 more
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Air-Coupled Low Frequency Ultrasonic Transducers and Arrays with PMN-32%PT Piezoelectric Crystals
Sensors, 2017 Air-coupled ultrasonic techniques are being increasingly used for material characterization, non-destructive evaluation of composite materials using guided waves as well as for distance measurements.
Rymantas J. Kazys +2 more
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Incorporation of viscoelastic loss into the plane wave expansion approach to modelling composite transducers [PDF]
, 2006 The plane wave expansion (PWE) method has been proposed as a theoretical model for periodic composite ultrasonic transducers. This paper extends previous work by importantly including viscoelastic loss in the material parameters.
A. J. Mulholland +9 more
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DESIGN OF INNOVATIVE MEASUREMENT SYSTEMS IN ULTRASONIC TOMOGRAPHY
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2022 The article describes the progress of construction and research works on ultrasound tomography. The devices allow for non-invasive measurements of various objects using ultrasonic low and high-frequency transducers.
Michał Gołąbek, Tomasz Rymarczyk
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Multi-layered piezoelectric composite transducers [PDF]
, 2003 Multilayered piezoelectric materials present themselves as a suitable technology for the development of sub 100kHz transducers. A variety of different configurations have been proposed, including stacked 2-2, 1-3 and 3-1 connectivity configurations ...
R.L. O'Leary +5 more
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