Topic
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, a theoretical Lamb wave tuning curve (LWTC) of a specific transducer size is obtained for selective actuation and sensing of Lamb wave modes, the sizes of the transducers and the driving frequency of the input waveform should be tuned.
Abstract: Surface-bonded lead zirconate titanate (PZT) transducers have been widely used for guided wave generation and measurement. For selective actuation and sensing of Lamb wave modes, the sizes of the transducers and the driving frequency of the input waveform should be tuned. For this purpose, a theoretical Lamb wave tuning curve (LWTC) of a specific transducer size is generally obtained. Here, the LWTC plots each Lamb wave mode' amplitude as a function of the driving frequency. However, a discrepancy between experimental and existing theoretical LWTCs has been observed due to little consideration of the bonding layer and the energy distribution between Lamb wave modes. In this study, calibration techniques for theoretical LWTCs are proposed. First, a theoretical LWTC is developed when circular PZT transducers are used for both Lamb wave excitation and sensing. Then, the LWTC is calibrated by estimating the effective PZT size with PZT admittance measurement. Finally, the energy distributions among symmetric and antisymmetric modes are taken into account for better prediction of the relative amplitudes between Lamb wave modes. The effectiveness of the proposed calibration techniques is examined through numerical simulations and experimental estimation of the LWTC using the circular PZT transducers instrumented on an aluminum plate.
75 citations
TL;DR: In this article, a simply supported symmetric cross-ply (0°/90°/0°) graphite-epoxy composite plate covered with piezoelectric material polyvinylidene fluoride (PVDF) is presented.
75 citations
TL;DR: In this article, a finite element formulation is presented for modeling the plate structure containing distributed piezoelectric sensors and actuators (S/As), and a new plate bending element for analysis of the plate with distributed S/As is developed.
75 citations
TL;DR: In this article, a two-stage damage identification method has been proposed using the data obtained from piezoelectric sensors, where first-order approximation technique is presented for numerically predicting the transient response of electrical potential change on sensors caused by damages, and the damage locations can then be detected by matching the numerical data and the experimental data in the frequency domain through a proposed detection technique.
74 citations
TL;DR: In this paper, a highly sensitive tactile sensor based on a floating gate organic transistor called Organic Charge Modulated FET coupled with a flexible piezoelectric polymer (namely a film of polyvinylene fluoride, PVDF) was proposed.
74 citations