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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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Journal ArticleDOI
TL;DR: In this paper, a step-up DC-AC piezoelectric-based power supply for driving high voltage actuators is described. But the proposed solution allows a reduction in size, weight and magnetic noise generation compared to the classical electromagnetic-based systems.
Abstract: This paper describes a novel step-up DC-AC piezoelectric-based power supply for driving piezoelectric actuators. Piezoelectric actuators have been demonstrated to be very attractive in applications requiring fast response and high actuation force, such as active damping applications. These actuators are commonly installed in self-powered systems (cars, helicopters, aircrafts, satellites, etc.) with limitation in the battery performance, dimensions and maximum weight. Nevertheless, the required driving electrical AC voltage for these actuators is typically in the range of 100 V to 1000 V, quite far from the 9 to 24 V of common batteries. Thus, the use of heavy, large and EMI-noisy electromagnetic transformers becomes necessary which is a drawback for the compact size required. This paper introduces an alternative system for driving piezoelectric actuators using a novel design of piezoelectric transformer, the Transoner®. The proposed solution allows a reduction in size, weight and magnetic noise generation compared to the classical electromagnetic-based systems. The work represents a completely novel approach to the possibilities of piezoelectric transformers for powering high voltage piezoelectric actuators. The solution offers significant advantages in environments requiring high integration, low weight, and low electromagnetic interferences operated with batteries. A circuit configuration capable of converting a 24 V DC input voltage up to 600 Vpp AC output voltage with frequency and magnitude control is implemented. Experimental results are presented for a standard multilayer piezoelectric actuator driven at 100 Vpp within the range of 10 Hz to 500 Hz.

36 citations

Patent
16 Mar 1998
TL;DR: In this paper, an operating plate made of a thin metal plate with a piezo sensor stuck on the side opposite to the operating surface is used to detect operating pressure and outputs a signal to a control unit accordingly.
Abstract: The appliance has an operating plate (5) made of a thin metal plate with a piezo sensor stuck on the side opposite to the operating surface. The piezo sensor detects an operating pressure and outputs a signal to a control unit accordingly. The operating surface may have symbols in the form of depressions in the surface, especially by engraving.

36 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of piezoceramic actuator hysteresis on helicopter vibration control using dual trailing-edge flaps is investigated, and the optimal actuator control input for hub vibration suppression is considerably different from the case of ideal-linear actuators.
Abstract: This study investigates the effect of piezoceramic actuator hysteresis on helicopter vibration control using dual trailing-edge flaps. Piezoceramic stack actuators are promising candidates for trailing-edge flap actuation in full-scale helicopters. However, they are inherently nonlinear in response to an applied electric field and exhibit hysteretic behavior between the applied electric field and displacement. In this study, bench-top tests are conducted on a commercially available piezoceramic stack actuator, and its dynamic hysteretic behavior is studied. A Preisach-type dynamic hysteresis model is used to describe the hysteresis in the stack actuator. The unknown coefficients in the model are obtained through identification from experimental data. An aeroelastic model of the helicopter with multiple trailing-edge flaps is then used to predict the hub vibration levels under different flight conditions. The optimal actuator control input for hub vibration suppression in the presence of actuator hysteresis is considerably different from the case of an ideal-linear actuator. Numerical results show the importance of modeling actuator hysteresis in helicopter vibration control using trailing-edge flaps. Ignoring or inaccurate modeling of hysteresis in the piezoceramic actuator can lead to inaccurate phasing of the trailing-edge flap motion which directly affects the performance of the vibration control system.

36 citations

Proceedings ArticleDOI
01 May 1996
TL;DR: In this article, the authors investigated the effect of temperature on the electrical impedance magnitude of a PZT sensor, and proposed a temperature compensation technique to compensate for the effects of temperature.
Abstract: Piezoelectric materials have been known to have temperature dependency regarding their basic properties, such as the dielectric constant and the piezoelectric coefficient. In this paper, this temperature dependency is investigated. The motivation of this work is linked to the impedance-based nondestructive evaluation (NDE) technique which employs piezoceramic (PZT) sensors for tracking changes in the structural impedance, by measuring the electrical impedance, to qualitatively identify damage. However, for this NDE technique to be successful in all types of environments, it must be insensitive to temperature variations. As mentioned earlier, piezoelectric materials have strong temperature dependency and a temperature compensation procedure is necessary. The approach used in this paper is empirical due to the complexity of the thermoelectromechanical constitutive modeling. Through experimental investigation, it was found that temperature will have the effect of shifting the electrical impedance magnitude of the piezoelectric sensor, while leaving the impedance phase unaffected. For a PZT PSI-5A, the variation was found to be linear in the 80 degree F to 160 degree F temperature range. To characterize the temperature effects in piezoelectric materials, a temperature coefficient which is independent of frequency has been defined. Finally, based on the defined temperature coefficient, a simple temperature compensation technique has been implemented successfully, eliminating the effects of temperature on PZT sensors while not eliminating the effects of temperature on the structure.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

36 citations

Journal ArticleDOI
TL;DR: A fast boundary element method for the analysis of three-dimensional solids with cracks and adhesively bonded piezoelectric patches, used as strain sensors, is presented in this article.

36 citations


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