نتایج جستجو برای: piezoelectric

تعداد نتایج: 13993  

2008
M. Rohani D. Dunn-Rankin F. Jabbari

In this paper, we study the response of a practical piezoelectric transducer, used to initiate droplet pinch-off in a capillary jet, to different driving waveforms at different frequencies. The study also examines how the piezoelectric’s response affects the jet breakup into droplets. Here we study sine wave and square wave periodic signals. The piezoelectric vibrates when a periodic voltage wi...

2016
Mahmoud Al Ahmad

The monitoring and early detection of abnormalities or variations in the cardiac cycle functionality are very critical practices and have significant impact on the prevention of heart diseases and their associated complications. Currently, in the field of biomedical engineering, there is a growing need for devices capable of measuring and monitoring a wide range of cardiac cycle parameters cont...

2015
Stefan Stübinger Andres Stricker Britt-Isabelle Berg

Piezosurgery, or the use of piezoelectric devices, is being applied increasingly in oral and maxillofacial surgery. The main advantages of this technique are precise and selective cuttings, the avoidance of thermal damage, and the preservation of soft-tissue structures. Through the application of piezoelectric surgery, implant-site preparation, bone grafting, sinus-floor elevation, edentulous r...

2013
Shiuh-Chuan Her Chi-Sheng Lin

Piezoelectric materials can be used as actuators for the active vibration control of smart structural systems. In this work, piezoelectric patches are surface bonded to a composite laminate plate and used as vibration actuators. A static analysis based on the piezoelectricity and elasticity is conducted to evaluate the loads induced by the piezoelectric actuators to the host structure. The load...

Journal: :Progress in materials science 2014
Qifa Zhou Kwok Ho Lam Hairong Zheng Weibao Qiu K Kirk Shung

Piezoelectric single crystals, which have excellent piezoelectric properties, have extensively been employed for various sensors and actuators applications. In this paper, the state-of-art in piezoelectric single crystals for ultrasonic transducer applications is reviewed. Firstly, the basic principles and design considerations of piezoelectric ultrasonic transducers will be addressed. Then, th...

2016
Alfredo Vazquez Carazo Kenji Uchino

Piezoelectric transformers (PTs) are solid-state devices that transform electrical energy into electrical energy by means of a mechanical vibration. These devices are manufactured using piezoelectric materials that are driven at resonance. With appropriate design and circuitry, it is possible to step up and step down the voltages between the input and output sections of the piezoelectric transf...

Journal: :journal of computational applied mechanics 0
rouhollah hosseini islamic azad university, south tehran branch maryam nouri young researchers and elite club

the most promising method for micro scale energy scavenging is via vibration energy harvesting which converts mechanical energy to electrical energy by the effect of coupling between electric fields and mechanical variables. using piezoelectric cantilevers is the most common method for vibration energy harvesting. changing the shape of the cantilevers can lead to changing the generated output v...

2014
Jun Liu Min Li Lan Qin Jingcheng Liu

To address the bottleneck issues of an elastic-style six-axis force/torque sensor (six-axis force sensor), this work proposes a no-elastic piezoelectric six-axis force sensor. The operating principle of the piezoelectric six-axis force sensor is analyzed, and a structural model is constructed. The static-active design theory of the piezoelectric six-axis force sensor is established, including a...

2014
Shifeng Huang Mimi Li Yuesheng Xu Dongyu Xu Xinchun Xie Xin Cheng

In this article, embedded ultrasonic sensors were prepared using 1–3-type piezoelectric composite and piezoelectric ceramic as the piezoelectric elements, respectively. The frequency bandwidth of the novel embedded ultrasonic sensors was investigated. To obtain the relationship between the receiving ultrasonic velocity and compressive strength, as well as their response signals to crack damage,...

2006
Albert C. To Shaofan Li Steven D. Glaser

An analysis is presented for transient response of a mode-III interfacial crack propagating between two dissimilar piezoelectric half spaces. The dynamic fracture toughness of a piezoelectric interface is examined, which is a central issue related to the interface strength of multi-layered sensors and ferroelectric thin film devices. For the mode-III crack propagation in piezoelectric materials...

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