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Piezoelectric sensor

About: Piezoelectric sensor is a research topic. Over the lifetime, 7127 publications have been published within this topic receiving 115903 citations.


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TL;DR: In this paper, an omnidirectional multi-element transducer for selective Lamb wave mode excitation is described, which is composed of several coaxial ring-shaped piezoelectric elements actuated by n-cycled sinusoidal tone bursts.
Abstract: This paper describes an omnidirectional multi-element transducer for selective Lamb wave mode excitation. It is composed of several coaxial ring-shaped piezoelectric elements actuated by n-cycled sinusoidal tone bursts. Mode selection is achieved through a special choice of the amplitudes and time delays of the input driving signals. The method for the determination of these parameters is based on strict analytical consideration. In the limiting case of an infinite number of cycles and with a sufficient number of actuators one can generate a single required mode and completely eliminate all undesired ones. It is shown that within the range of applicability of a simplified model for the piezoelectric elements, i.e. when the actuating contact traction is replaced by a pair of concentrated opposite ring tangential forces, no time delays are needed, and the mode selection is achieved through an appropriate choice of the driving input-signal amplitudes applied in phase or out of phase to different transducer elements.

39 citations

Journal ArticleDOI
TL;DR: In this article, the free vibration of multilayered piezoelectric composite plates is investigated using the differential quadrature (DQ) technique to solve three-dimensional equations of piezoelasticity.

39 citations

Journal ArticleDOI
TL;DR: In this paper, a postbuckling analysis for a cross-ply laminated cylindrical shell with piezoelectric actuators subjected to the combined action of mechanical, electric and thermal loads is presented.

39 citations

Journal ArticleDOI
TL;DR: In this paper , a simple and effective method is proposed for quantitatively identifying and extracting the piezoelectric charge from the hybrid signal generated by a polyvinylidene fluoride-based device.
Abstract: Polymer-based piezoelectric devices are promising for developing future wearable force sensors, nanogenerators, and implantable electronics, etc. The electric signals generated by them are often assumed as solely coming from the piezoelectric effect. However, triboelectric signals originated from contact electrification between the piezoelectric devices and the contacted objects can produce non-negligible interfacial electron transfer, which is often combined with the piezoelectric signal to give a triboelectric-piezoelectric hybrid output, leading to an exaggerated measured "piezoelectric" signal. Herein, a simple and effective method is proposed for quantitatively identifying and extracting the piezoelectric charge from the hybrid signal. The triboelectric and piezoelectric parts in the hybrid signal generated by a poly(vinylidene fluoride)-based device are clearly differentiated, and their force and charge characteristics in the time domain are identified. This work presents an effective method to elucidate the true piezoelectric performance in practical measurement, which is crucial for evaluating piezoelectric materials fairly and correctly.

39 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202385
2022134
2021146
2020219
2019251
2018238