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High frequency copolymer ultrasonic transducer array of size-effective elements

A layer-by-layer deposition method for producing dual-layer ultrasonic transducers from piezoelectric copolymers has been developed. The method uses a combination of customized and standard processing to obtain 2D array transducers with electrical connection of the individual elements routed directl...

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Published in:Smart materials and structures 2018-02, Vol.27 (2), p.25001
Main Authors: Decharat, Adit, Wagle, Sanat, Habib, Anowarul, Jacobsen, Svein, Melandsø, Frank
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Language:English
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cited_by cdi_FETCH-LOGICAL-c378t-eb9d835201edcafa24ea28c46cf89200a0b8582bdab1d04008c327ec672c0d503
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description A layer-by-layer deposition method for producing dual-layer ultrasonic transducers from piezoelectric copolymers has been developed. The method uses a combination of customized and standard processing to obtain 2D array transducers with electrical connection of the individual elements routed directly to the rear of the substrate. A numerical model was implemented to study basic parameters effecting the transducer characteristics. Key elements of the array were characterized and evaluated, demonstrating its viability of 2D imaging. Signal reproducibility of the prototype array was studied by characterizing the variations of the center frequency ( 42 MHz) and bandwidth ( 25 MHz) of the acoustic. Object identification was also tested and parameterized by acoustic-field beamwidth as well as proper scan step size. Simple tests to illustrate a benefit of multi-element scan on lowering the inspection time were conducted. Structural imaging of the test structure underneath multi-layered wave media (glass plate and distilled water) was also performed. The prototype presented in this work is an important step towards realizing an inexpensive, compact array of individually operated copolymer transducers that can serve in a fast/volumetric high frequency (HF) ultrasonic scanning platform.
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1361-665X
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source NORA - Norwegian Open Research Archives; Institute of Physics
subjects copolymer-based transducer
Fysikk: 430
high frequency ultrasonic imaging
high-frequency piezoelectric transducer
Matematikk og Naturvitenskap: 400
Mathematics and natural science: 400
multi element scanning
multi layer transducer
P(VDF-TrFe)
Physics: 430
VDP
title High frequency copolymer ultrasonic transducer array of size-effective elements
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