Results 31 to 40 of about 50,810 (296)

Progress Towards a Multi-Modal Capsule Endoscopy Device Featuring Microultrasound Imaging [PDF]

, 2016
Current clinical standards for endoscopy in the gastrointestinal (GI) tract combine high definition optics and ultrasound imaging to view the lumen superficially and through its thickness.
Al-Rawhani, M., Beeley, J., Cochran, S., Cox, B.F., Cumming, D., Cummins, G., Demore, C.E.M., Desmulliez, M.P.Y., Lay, H.S., McPhillips, R., Poltarjonoks, R., Qiu, Y., Seetohul, V., Trolier-McKinstry, S., Wallace, M.   +14 more
core   +2 more sources

Active control of a clamped beam equipped with piezoelectric actuator and sensor using generalized predictive control [PDF]

, 2004
of a flexible structure is here presented. The studied structure is a clamped-free beam equipped with collocated piezoelectric actuator/sensor. Piezoelectric transducers advantages lie in theirs compactness and reliability, making them commonly used in
Bordeneuve-Guibé, Joël, Pommier-Budinger, Valérie, Richelot, Julien   +2 more
core   +2 more sources

Theoretical modelling of frequency dependent elastic loss in composite piezoelectric transducers [PDF]

, 2007
The large number of degrees of freedom in the design of piezoelectric transducers requires a theoretical model that is computationally efficient so that a large number of iterations can be performed in the design optimisation.
Hayward, G., Mulholland, A.J., O'Leary, R.L., Orr, L., Parr, A.C.S., Pethrick, R.A.   +5 more
core   +1 more source

Comparative analysis of ultrasonic control sensitivity in using straight and angle piezoelectric transducers of different manufacturers on the example of flaw detector UD2-102 Peleng

Вестник Научно-исследовательского института железнодорожного транспорта
Introduction. Railway transport has ultrasonic control as one of the main methods of detection of defects of the type of continuity violation (cracks, pores and others) both in the base metal and in weld seams of various items.
A. G. Otoka, O. V. Kholodilov
doaj   +1 more source

Investigating the thermal stability of 1-3 piezoelectric composite transducers by varying the thermal conductivity and glass transition temperature of the polymeric filler material [PDF]

, 2002
The thermal behaviour of a number of 1-3 piezoelectric composite transducers is discussed. In particular, devices manufactured from a polymer filler with a relatively high glass to rubber transition temperature (T-g), and from polymer systems with ...
Benny, C.G., Ewing, H.C., Hayward, G., MacKintosh, A.R., O'Leary, R.L., Parr, A.C.S., Smillie, G.   +6 more
core   +1 more source

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

Piezoelectric Micromachined Ultrasonic Transducers (PMUTs): Performance Metrics, Advancements, and Applications

Sensors, 2022
With the development of technology, systems gravitate towards increasing in their complexity, miniaturization, and level of automation. Amongst these systems, ultrasonic devices have adhered to this trend of advancement.
Yumna Birjis, Siddharth Swaminathan, Haleh Nazemi, Gian Carlo Antony Raj, Pavithra Munirathinam, Aya Abu-Libdeh, Arezoo Emadi   +6 more
doaj   +1 more source

Analysis and Comparison of Macro Fiber Composites and Lead Zirconate Titanate (PZT) Discs for an Energy Harvesting Floor

Applied Sciences, 2020
The main drawback in many electronic devices is the duration of their batteries. Energy harvesting provides a solution for these low-consumption devices. Piezoelectric energy harvesting use is growing because it collects small amounts of clean energy and
Carlos Quiterio Gómez Muñoz, Gabriel Zamacola Alcalde, Fausto Pedro García Márquez   +2 more
doaj   +1 more source

An Acoustically Transparent Electrical Cap for Piezoelectric Ultrasound Transducers on Silicon

Proceedings
Bulk piezoelectric ultrasound transducers on integrated circuits offer unique properties for therapeutic applications of ultrasound neuromodulation. However, current implementations of such transducers are not optimized for the high transmit efficiency ...
Gandhika K. Wardhana, Tiago L. Costa, Massimo Mastrangeli   +2 more
doaj   +1 more source

Design Strategies and Emerging Applications of High‐Performance Flexible Piezoresistive Pressure Sensors

Advanced Functional Materials, EarlyView.
Flexible piezoresistive pressure sensors underpin wearable and soft electronics. This review links sensing physics, including contact resistance modulation, quantum tunneling and percolation, to unified materials/structure design. We highlight composite and graded architectures, interfacial/porous engineering, and microstructured 3D conductive networks
Feng Luo, Artur Ciesielski, Paolo Samorì   +2 more
wiley   +1 more source