ultrasonic transducer
Properties of photocured epoxy resin materials for application in piezoelectric ultrasonic transducer matching layers
... This paper describes the acoustic properties of a range of epoxy resins prepared by photocuring that are suitable for application in piezoelectric ultrasonic transducer matching layers. Materials, based on ...
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Concurrent photoacoustic and ultrasound microscopy with a coaxial dual-element ultrasonic transducer
... dual-element ultrasonic transducer (DE-UST) and provides anatomical and functional information with complementary contrast mechanisms, achieving a spatial resolution of 7 μ m for PA imaging and 106 μ m for ...
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3D Reconstruction of Surface Topography using Ultrasonic Transducer
... the transducer with the necessary distance between each step. An Ultrasonic pulse receiver receives the analog signals from the ultrasonic transducer and converts them into digital ...
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Flexible Two-dimensional Ultrasonic Transducer Array: Design, Fabrication and Characterization.
... of ultrasonic transducer are designed and ...2D ultrasonic transducer ...flexible transducer arrays can be used to conform to the targets curvature and give better ...two-dimensional ...
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A theoretical model of an ultrasonic transducer incorporating spherical resonators
... This article considers the theoretical modelling of such an ultrasonic transducer. The design con- sists of a metalized Mylar membrane stretched over a conducting backplate which incorporates evenly spaced ...
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Optimization Design of Phased Array Ultrasonic Transducer Arrays
... Can be seen, with the expansion of the deflection angle range, array spacing must be reduced sharply in order to ensure the absence of grating lobes. When the deflection range is about ± 20°, the array element spacing ...
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Piezoceramic Element Design and Fabrication for Ultrasonic Transducer of Gas Meter
... in ultrasonic flowmeters. Depending on the required accuracy, the ultrasonic transducers can be installed either in one pair or more in an ultrasonic ...an ultrasonic transducer is its ...
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Analysis of a fractal ultrasonic transducer with a range of piezoelectric length scales
... pre-fractal transducer has more resonance ...fractal transducer also produced a higher amplitude (or gain) in transmission and reception sensitivities than the standard design, a 5 dB increase in ...
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Ultrasonic transducer attenuation behavior of fiber glass composite laminates (FGCL) through signal filtering approach
... In ultrasonic non-destructive tests, transducer is one of the most part need to determine ...of transducer will impact overall ultrasonic measurement accuracy base on signal processing ...
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An Approach to Designing a Dual Frequency Piezoelectric Ultrasonic Transducer
... piezoelectric ultrasonic transducer having longitudinal vibrations for high power ...the transducer in the half-wave and the all-wave vibrational modes were determined for the assumed first resonance ...
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A pipe organ-inspired ultrasonic transducer
... The mathematical model used in this article is a transmission line (1D in space) model introduced by Walker & Mulholland (2010) and discussed further by Walker & Mulholland (2016). The model outputs the ...
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Evaluation of Rolling Fatigue Damage in Deep Groove Ball Bearings by Divided Type Focusing Ultrasonic Transducer
... focusing ultrasonic transducer. A new focusing ultrasonic transducer was developed by molding a piezoelectric copolymer into a concave-shaped ...fabricate ultrasonic transducers with a ...
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Investigating the performance of a fractal ultrasonic transducer under varying system conditions
... existing transducer designs have been iteratively improved over many ...standard transducer design, and a transducer based on a fractal ...fractal transducer performance is ...
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Heartbeat rate and heart rate variability Extraction using ultrasonic transducer
... Abstract :This paper presents a Doppler radar system used to detect the heartbeat signal from a distance of one meter. The proposed system is based on using a ultrasonic transceiver and two antennas. Measurements ...
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A Low-Power Integrated Interface Circuit for a Resonant Gas Sensor Based on a Capacitive Micromachined Ultrasonic Transducer (CMUT).
... Fig. 3.6 shows the complete BJT-based design. In this implementation the current-based biasing is used. An external current source is used and that current is mirrored inside the chip to bias the BJT. A resistor ...
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Apparatus and method for driving an ultrasonic transducer
... an ultrasonic acoustic transducer. The transducer is operable in two modes; in a first mode, the lock-in frequency of the transducer is determined; in a second mode, the lock-in frequency ...
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Focusing system for an ultrasonic transducer
... hemisphere piezoelectric crystal having a non-uniform beam width and a better lateral resolution than the plane transducer due to reduced beam width in the foc... Objective of Research T[r] ...
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A Composite Ultrasonic Transducer with a Fractal Architecture
... [29] L. A. Orr, A. J. Mulholland, R. L. O’Leary, A. Parr, R. Pethrick, and G. Hayward. Theoretical Modelling of Frequency Dependent Elastic Loss in Composite Piezoelectric Transducers. Ultrasonics, 47(1):130–137, (2007). ...
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Multiviewing Ultrasonic Transducer System for Flaw Reconstruction
... AUTOMATED FLAW RECONSTRUCTION WITH MULTIVIEW APPARATUS When a flaw of arbitrary orientation is situated below a flat part surface, a multiviewing aperture with its axis perpendicular to [r] ...
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Wideband electromagnetic dynamic acoustic transducer as a standard acoustic source for air coupled ultrasonic sensors
... of ultrasonic sensors, a wideband air-coupled ultrasonic transducer, wideband electromagnetic dynamic acoustic transducer (WEMDAT), is designed and ...the transducer has a wide ...
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