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 article, a plate with a single-piece symmetrically distributed and quarterly segmented-distributed sensors/actuators is modeled and analytical solutions are derived for modal sensitivities and modal feedback factors.
86 citations
TL;DR: In this article, the effects of embedding piezoelectric lead zirconate-titanate (PZT) sensors on the tensile strength and fatigue behavior of a quasi-isotropic graphite/epoxy laminate as well as the embedded sensor's voltage degradation under these loading conditions were investigated.
Abstract: This study investigated the effects of embedding piezoelectric lead zirconate-titanate (PZT) sensors on the tensile strength and fatigue behavior of a quasi-isotropic graphite/epoxy laminate as well as the embedded sensor's voltage degradation under these loading conditions. For this, AS4/3501-6 laminates were fabricated with a lay-up where PZT was inserted into a cut-out area in the two middle plies. Monotonic tensile tests showed that both the average ultimate strength and Young's modulus of the tested laminate with or without PZT were within 4% of each other. The fatigue lives with and without PZT were very close to each other as well. Overall, the sequence of damage in this study agreed with previous investigations of the damage mechanisms for quasi-isotropic laminates. The ranges of modulus reduction in both cases, with and without PZT, were within 5 to 15% of each other during fatigue loading. Delamination growths in both cases during most of the fatigue life were also very comparable to each other. Further, this study showed that the embedded PZT would maintain a steady voltage output indefinitely when mechanically cycled within its operational strain limit. It thus appears that the embedment of PZTs in a cut-out area of plies of quasi-isotropic graphite/epoxy laminates would not affect their monotonic tensile and fatigue behavior.
86 citations
TL;DR: In this paper, a piezoelectric and conductivity sensor in electrolyte solution was constructed by connecting an AT-cut piezel crystal and a conductivity electrode in series, which has a sensitive and selective frequency response to the change in solution conductivity and permittivity.
86 citations
TL;DR: In this paper, a mechanically excited unimorph piezoelectric membrane transducer was used to generate a power of 0.65 mW at the resonance frequency (1.71 kHz) across a 5.6 kΩ optimal resistor and for a 80 n force.
85 citations
22 May 2008
TL;DR: In this paper, a diaphragm micro-pump with two valves was developed to actuate liquid by the vibration of a diophragm, and the measured maximum flow rate of present design is 72ml/min at zero total pump head in the range of operation frequency 70-180 Hz.
Abstract: In this study, a new type of thin, compact, and light weighed diaphragm micro-pump has been successfully developed to actuate liquid by the vibration of a diaphragm. The micro-diaphragm pump with two valves is fabricated in an aluminum case by using highly accurate CNC machine, and the cross-section dimension is 28 mm × 5 mm. Both valves and diaphragm are manufactured from PDMS. The amplitude of vibration by a piezoelectric device produces an oscillating flow and alters the chamber volume by the curvature change of a diaphragm. Several experimental set-ups for performance tests in a single micro-diaphragm pump, isothermal flow open system, and a closed liquid cooling system are designed and implemented. The performance of a one-side actuating micro-diaphragm pump is affected by the design of check valves, diaphragm, piezoelectric device, chamber volume, input voltage and frequency. The measured maximum flow rate of present design is 72 ml/min at zero total pump head in the range of operation frequency 70–180 Hz.
85 citations