Reducing mechanical cross-coupling in phased array transducers using stop band material as backing

Henneberg, Johannes; Gerlach, André; Storck, Heiner; Cebulla, Holger; Marburg, Steffen

doi:10.1016/j.jsv.2018.03.021

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…Fig. 1 schematically illustrates the mode elimination technique and wave propagation in a BG structure in which the evanescent wave decays before it reaches boundaries [29][30][31] in comparison to a bare plate. In the figure, the green squares represent the periodic elements that compose the BG structure.…”

Section: Introductionmentioning

confidence: 99%

Spectrally smooth and spatially uniform sound radiation from a thin plate structure using band gaps

Jung

Jeong

Jensen

2020

Journal of Sound and Vibration

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Section: Introductionmentioning

confidence: 99%

Spectrally smooth and spatially uniform sound radiation from a thin plate structure using band gaps

Jung

Jeong

Jensen

2020

Journal of Sound and Vibration

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“…The major objective of ongoing and future research in this area is to optimize the electroacoustic performance of these transducers, to obtain a high image resolution for more reliable and safe diagnostics. For this purpose, several works investigate the crosstalk phenomenon, which decreases the performance of the ultrasonic transducer arrays [6][7][8][9][10][11][12][13][14]. Indeed, when one element of a transducer array is driven, it generates parasitic voltages and/or displacement fields on the passive neighboring elements, which affects the performance of these devices.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the electrical limit conditions effects in piezoelectric transducer arrays utilized in medical imaging

et al. 2020

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Crosstalk is considered as an undesirable phenomenon disturbing the electromechanical behavior of the ultrasonic transducer arrays used in medical imaging applications. Indeed, when one element of a transducer array is excited, it generates parasitic voltages and/or displacement fields on the adjacent passive elements. Consequently, these interactions between elements decrease the array's electroacoustic performance, which affects the obtained image quality. To overcome the crosstalk's problem, several research works propose active cancellation techniques. In this case, the correction voltages are determined by considering the array's elements grounded, contrary to the conventional crosstalk's definition which considers the array elements in Open-Circuit. The novelty of this paper is in one hand the study of the electrical limit conditions' effects on the physical behavior of a piezoelectric transducer array radiating in a fluid medium (water). On the other hand, a displacement method is proposed to evaluate the crosstalk level when the array elements are grounded. The limitations of the proposed method are also discussed. For this purpose, a piezoelectric transducer array is firstly modeled using a Two-dimensional Finite Elements Method (FEM), when the array elements are not grounded (open-circuit). Then, the results are compared to those obtained when the neighboring elements are grounded (as in the case of the crosstalk's active cancellation techniques).Finally, measurements are realized on a fabricated transducer array vibrating in air medium and are successfully compared to the results predicted using FEM.

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Periodically arranged acoustic metamaterial in industrial applications: The need for uncertainty quantification

et al. 2020

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Reducing mechanical cross-coupling in phased array transducers using stop band material as backing

Cited by 9 publications

References 19 publications

Spectrally smooth and spatially uniform sound radiation from a thin plate structure using band gaps

Spectrally smooth and spatially uniform sound radiation from a thin plate structure using band gaps

Investigation of the electrical limit conditions effects in piezoelectric transducer arrays utilized in medical imaging

Periodically arranged acoustic metamaterial in industrial applications: The need for uncertainty quantification

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