Results 51 to 60 of about 57,861 (293)

Compound Damages Detection for Rotors by the Coupled Piezoelectric Impedance

IEEE Access, 2018
The rotor is a key component of rotating machinery, thus it is of great importance to quantitatively detect its damage. Since the sensitivity matrix in the impedance-based rotor damage identification model with a single piezoelectric transducer has lower
Yongfang Mao, Yi Qin, Aibing Zhang
doaj   +1 more source

Analysis of ultrasonic transducers with fractal architecture [PDF]

, 2008
Ultrasonic transducers composed of a periodic piezoelectric composite are generally accepted as the design of choice in many applications. Their architecture is normally very regular and this is due to manufacturing constraints rather than performance ...
ANTHONY J. MULHOLLAND, GORDON HAYWARD, Kigami J., Lapidus M. L., LEIGH-ANN ORR, Meeker T. R., Neumaier A., O'Leary R. L., RICHARD L. O'LEARY, Yamaguti M.   +9 more
core   +1 more source

Smart Face Masks as Wearable Respiratory Sensors: A Review of Sensor Technologies, Materials, and Future Directions

Advanced Healthcare Materials, EarlyView.
This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi, Naseeh Backer Kannanthodi, Alice Nicole Casling, Babar Ali, Samira Lakouraj Mansouri, Alessandro Giuseppe D'aloia, Hossein Cheraghi Bidsorkhi, Maria Sabrina Sarto   +7 more
wiley   +1 more source

Bubble Electret-Elastomer Piezoelectric Transducer

Energies, 2020
Ferroelectret-based piezoelectric transducers are, nowadays, commonly used in energy harvesting applications due to their high piezoelectric activity. Unfortunately, the processing properties of such materials are limited, and new solutions are sought ...
Ryszard Kacprzyk, Agnieszka Mirkowska
doaj   +1 more source

Printing High Viscosity Fluids using Ultrasonic Droplet Generation [PDF]

, 2008
A new printing technology based on ultrasonic actuation (~1 MHz) is presented that has the potential to print high viscosity fluids. In this paper, we describe the print-head’s operating principles and construction.
Margolin, Lauren, Rosen, David W., Vohra, Sanjay   +2 more
core   +1 more source

Nanotherapies for Atherosclerosis: Targeting, Catalysis, and Energy Transduction

Advanced Healthcare Materials, EarlyView.
Atherosclerosis management is hindered by poor drug targeting and plaque heterogeneity. Nanotechnology overcomes these barriers via three core strategies: (1) target‐engineered nanocarriers that achieve lesion‐specific precision via ligand modification, biomimetic camouflage, stimuli‐responsive release, and self‐propelling nanomotors; (2) catalytic ...
Yuqi Yang, Jingguo Qu, Tonghuan Xiao, Xinyang Han, Michael Tin‐Cheung Ying   +4 more
wiley   +1 more source

Fabrication and performance of Tile transducers for piezoelectric energy harvesting

AIP Advances, 2020
In recent years, pavement piezoelectric energy harvesting has become one of the most promising road energy harvesting system clean energy sources. However, it is difficult for existing piezoelectric transducer structures to meet road power generation ...
Zhiming Liu, Guangya Ding, Jun Wang, Guojun Cai, Xiangzhen Qin, Kaixi Shi   +5 more
doaj   +1 more source

A Data Driven Review of In Vitro Electrical and Mechanical Stimulation for Post‐Acute Phase Wound Healing

Advanced Healthcare Materials, EarlyView.
This review examines how in vitro electrical and mechanical stimulation modulates wound healing in fibroblasts and keratinocytes. Analyzing over 560 experimental data points, we relate stimulation parameters to proliferation and migration outcomes, evaluate platform designs, and highlight the need for multi‐parameter optimization to advance targeted ...
Matthew K. Burgess, Ellen F. Marsh, Veronica M. Lucian, Malavika Nair   +3 more
wiley   +1 more source

Hybrid electromagnetic–piezoelectric vibration energy harvester for harsh temperature environments

Applications in Engineering Science
This study presents a hybrid vibration energy harvester developed for operation in harsh temperature environments. The device features a single-degree-of-freedom bimorph cantilever beam that incorporates electromagnetic and piezoelectric transduction ...
Muhammad Zafar Ijaz, Farid Ullah Khan
doaj   +1 more source

Radial Vibration Characteristics of Piezoelectric Ceramic Composite Ultrasonic Transducer

Shock and Vibration, 2020
Different from the existing equivalent circuit analysis method of the transducer, based on the vibration theory of the mechanical system and combined with the constitutive equation, this paper analyzes the radial vibration characteristics of the ...
Chundong Yao, Chao Zhang, Jiani Zhang, Yang Zhang   +3 more
doaj   +1 more source