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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.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the shape functions of smart slender beams with integrated piezoelectric actuators and sensors are derived and formulated in the form of integral equations of the first kind for shape functions.
Abstract: Flexural vibrations of smart slender beams with integrated piezoelectric actuators and sensors are considered. A spatial variation of the sensor/actuator activity is achieved by shaping the surface electrodes and/or varying the polarization profile of the piezoelectric layers, and this variation is characterized by shape functions. Seeking shape functions for a desired purpose is termed a shaping problem. Utilizing the classical lamination theory of slender composite beams, equations for shaped sensors and actuators are derived. The interaction of mechanical, electrical and thermal fields is taken into account in the form of effective stiffness parameters and effective thermal bending moments. Self-sensing actuators are included. From these sensor/actuator equations, shaping problems with a practical relevance are formulated and are cast in the form of integral equations of the first kind for the shape functions. As a practical interesting aspect of these inverse problems, shape functions which fail to me...

64 citations

Patent
30 May 2001
TL;DR: In this paper, a piezoelectric element, for generating drive force for an injector, is provided with a plurality of alternately stacked layers expanding and contracting in accordance with application of voltage and internal electrode layers for supplying the applied voltage.
Abstract: A piezoelectric element, for generating drive force for an injector, is provided with a plurality of alternately stacked piezoelectric layers expanding and contracting in accordance with application of voltage and internal electrode layers for supplying the applied voltage. The piezoelectric layers contain voids, but the total thickness in the stacking direction of the voids contained in any one piezoelectric layer is not more than ⅓ of the thickness in the stacking direction of the piezoelectric layer and the thickness in the stacking direction of each of the voids is not more than 50 μm.

64 citations

Journal ArticleDOI
TL;DR: In this article, the authors examined the feasibility of employing the new generation fibre optic and piezoelectric sensor systems for comprehensive monitoring of rocks, covering load history monitoring/retrieval as well as damage assessment.

63 citations

Journal ArticleDOI
TL;DR: In this article, the active aeroelastic flutter characteristics and vibration control of supersonic beams applying the piezoelectric material are studied further using the assumed mode method.
Abstract: The active vibration control of all kinds of structures by using the piezoelectric material has been extensively investigated. In this paper, the active aeroelastic flutter characteristics and vibration control of supersonic beams applying the piezoelectric material are studied further. The piezoelectric materials are bonded on the top and bottom surfaces of the beams to act as the actuator and sensor so that the active aeroelastic flutter suppression for the supersonic beams can be conducted. The supersonic piston theory is adopted to evaluate the aerodynamic pressure. Hamilton's principle with the assumed mode method is used to develop the dynamical model of the structural systems. By using the standard eigenvalue methodology, the solutions for the complex eigenvalue problem are obtained. A negative velocity feedback control strategy is used to obtain active damping. The aeroelastic flutter bounds are calculated and the active aeroelastic flutter characteristics are analyzed. The impulse responses of the structural system are obtained by using the Houbolt numerical algorithm to study the active aeroelastic vibration control. The influences of the non-dimensional aerodynamic pressure on the active flutter control are analyzed. From the numerical results it is observed that the aeroelastic flutter characteristics of the supersonic beams can be significantly improved and that the aeroelastic vibration amplitudes can be remarkably reduced, especially at the flutter points, by using the piezoelectric actuator/sensor pairs which can provide an active damping. Within a certain value of the feedback control gain, with the increase of it, the flutter aerodynamic pressure (or flutter velocity) can be increased and the control results are also improved.

63 citations

Proceedings ArticleDOI
H.S. Tzou1
14 May 1989
TL;DR: The development of a lightweight piezoelectric end-effector (multifinger type) for robotic applications is reported, designed for lightweight objects such as electronic chips, and for high-precision operation.
Abstract: The development of a lightweight piezoelectric end-effector (multifinger type) for robotic applications is reported. The fundamental configuration of each finger is a simple piezoelectric bimorph structure made of a piezoelectric polyvinylidene fluoride material. Injection of a controlled high voltage into the finger can induce a deformation in a prescribed direction. Depending on the applied voltage, the effector can hold an object from outside or inside. The theoretical predictions are verified by the experimental and finite-element simulation results. This end effector is designed for lightweight objects such as electronic chips, and for high-precision (or even micro-precision) operation. Gripping force can always be enhanced by injecting higher voltage. Coordinating the applied voltage in two fingers can also compensate the position offset if misalignment exists in the setup. >

63 citations


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