Contact-Type Vibration Sensors Using Curved Clamped PVDF Film

Toda, Minoru; Thompson, Mitchell

doi:10.1109/jsen.2006.881407

Cited by 61 publications

(33 citation statements)

References 5 publications

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“…Curved [1][2][3][4][5] and corrugated [6][7][8][9][10][11] cylindrical shell piezoelectric transducers (see Fig.1) have been studied recently both experimentally [1,3,[5][6][7] and theoretically by either the theory of piezoelectricity [1,[3][4][5] or equivalent circuits [2] . They have been extensively used as sensors [1,2,5,7] , and devices for acoustic · 565 · wave generation and reception.…”

Section: Introductionmentioning

confidence: 99%

“…They have been extensively used as sensors [1,2,5,7] , and devices for acoustic · 565 · wave generation and reception. In particular, it is a crucial component in an acoustic wave generation device we have been developing [10,11] in which the shell transducer is made from a PVDF film fully electroded on both sides.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the reported theoretical analyses [1,[3][4][5] are on curved transducers or equivalently one piece of a corrugated transducer. For a corrugated transducer made of identical circular cylindrical pieces mounted properly, theoretically there exist spatially periodic vibration modes in which all pieces vibrate in the same way and it is sufficient to analyze one piece for certain purposes.…”

Section: Introductionmentioning

confidence: 99%

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High-frequency vibrations of corrugated cylindrical piezoelectric shells

Xu¹,

Hu²,

Hu³

et al. 2008

Acta Mech. Solida Sin.

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Coupled extensional and flexural cylindrical vibrations of a corrugated cylindrical piezoelectric shell consisting of multiple pieces of circular cylindrical surfaces smoothly connected along their generatrix are studied. To validate the results for the case of relatively thick shells or equivalently high-frequency modes with short wavelengths, existing analysis is extended by considering shear deformation and rotatory inertia. An analytical solution is obtained. Based on the solution, resonant frequencies and mode shapes are calculated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-frequency vibrations of corrugated cylindrical piezoelectric shells

Xu¹,

Hu²,

Hu³

et al. 2008

Acta Mech. Solida Sin.

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show abstract

“…introduction c urved [1]- [5] and corrugated [6], [7] cylindrical shell piezoelectric transducers (see fig. 1) have been studied recently both experimentally [1], [3], [5]- [7] and theoretically by either the theory of piezoelectricity [1], [3]- [5] or equivalent circuits [2]. they have found various applications as sensors [1], [2], [5], [7] or devices for acoustic wave generation and reception.…”

mentioning

confidence: 99%

“…1) have been studied recently both experimentally [1], [3], [5]- [7] and theoretically by either the theory of piezoelectricity [1], [3]- [5] or equivalent circuits [2]. they have found various applications as sensors [1], [2], [5], [7] or devices for acoustic wave generation and reception. in particular, it is a crucial component in an acoustic wave generation device we have been developing [8], [9] in which the shell transducer is made from a PVdf film fully electroded on its two major faces.…”

mentioning

confidence: 99%

Study on the vibration characteristics of a finite-width corrugated cylindrical shell piezoelectric transducer

Xu¹,

Hu²,

Shan³

et al. 2010

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Coupled extensional and flexural vibrations of an ultrasonic piezoelectric transducer are studied in the paper. The ultrasonic piezoelectric transducer is made of piezoelectric polymer PVDF films and modeled as a corrugated cylindrical shell with a finite width in the ridge direction, which consists of multiple pieces of circular cylindrical surfaces smoothly connected along their ridges. The classical shell theory is used to obtain the theoretical solution. Effects of the edge constraints on vibrational characteristics of the resonant frequencies, mode shapes, and internal forces are investigated for a corrugated ultrasonic piezoelectric transducer consisting of a few circular pieces each with a thickness of about 40 microm, radius of 5 mm, and span angle of 120 degrees.

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A Soft Resistive Acoustic Sensor Based on Suspended Standing Nanowire Membranes with Point Crack Design

Gong

Yap

Zhu

et al. 2020

Adv Funct Materials

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An artificial basilar membrane (ABM) is an acoustic transducer that mimics the mechanical frequency selectivity of the real basilar membrane, which has the potential to revolutionize current cochlear implant technology. While such ABMs can be potentially realized using piezoelectric, triboelectric, and capacitive transduction methods, it remains notoriously difficult to achieve resistive ABM due to the poor frequency discrimination of resistive‐type materials. Here, a point crack technology on noncracking vertically aligned gold nanowire (V‐AuNW) films is reported, which allows for designing soft acoustic sensors with electric signals in good agreement with vibrometer output—a capability not achieved with corresponding bulk cracking system. The strategy can lead to soft microphones for music recognition comparable to the conventional microphone. Moreover, a soft resistive ABM is demonstrated by integrating eight nanowire‐based sensor strips on a soft trapezoid frame. The wearable ABM exhibits high‐frequency selectivity in the range of 319–1951 Hz and high sensitivity of 0.48–4.26 Pa−1. The simple yet efficient fabrication in conjunction with programmable crack design indicates the promise of the methodology for a wide range of applications in future wearable voice recognition devices, cochlea implants, and human–machine interfaces.

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Contact-Type Vibration Sensors Using Curved Clamped PVDF Film

Cited by 61 publications

References 5 publications

High-frequency vibrations of corrugated cylindrical piezoelectric shells

High-frequency vibrations of corrugated cylindrical piezoelectric shells

Study on the vibration characteristics of a finite-width corrugated cylindrical shell piezoelectric transducer

A Soft Resistive Acoustic Sensor Based on Suspended Standing Nanowire Membranes with Point Crack Design

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