Results 31 to 40 of about 28,947 (291)
Mechanical On-Chip Microwave Circulator [PDF]
, 2017 Nonreciprocal circuit elements form an integral part of modern measurement and communication systems. Mathematically they require breaking of time-reversal symmetry, typically achieved using magnetic materials and more recently using the quantum Hall ...
Barzanjeh, S. +6 more
core +7 more sources
Improving Electromechanical Impedance Damage Detection Under Varying Temperature
Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 2022 The field of structural health monitoring has seen a fundamental shift in recent years, as researchers strive to replace conventional non-destructive evaluation techniques with smart material-based techniques. Perhaps the most promising of smart material techniques for developing structural health monitoring (SHM) systems is electromechanical impedance
null Mohamed Djemana +2 more
openaire +2 more sources
Experimental investigation of inter-element isolation in a medical array transducer at various manufacturing stages [PDF]
, 2016 This work presents the experimental investigation of vibration maps of a linear array transducer with 192 piezoelements by means of a laser Doppler vibrometer at various manufacturing finishing steps in air and in water.
Bini, Fabiano +2 more
core +1 more source
The Scientific World Journal, 2014 This study developed an integrated global-local approach for locating damage on building structures. A damage detection approach with a novel embedded frequency response function damage index (NEFDI) was proposed and embedded in the Imote2.NET-based ...
Tzu-Hsuan Lin +2 more
doaj +1 more source
IEEE Access, 2018 Bolted joint are among the key components that enable the robust assembly of a wide variety of structures. However, due to wear and tear over time, bolted joint may loosen, and if not detected in its early stages, can lead to devastating results.
Furui Wang +3 more
doaj +1 more source
Frequency support characteristics of grid-interactive power converters based on the synchronous power controller [PDF]
, 2016 Grid-interactive converters with primary frequency control and inertia emulation have emerged and are promising for future renewable generation plants because of the contribution in power system stabilization.
Remón Rodríguez, Daniel +2 more
core +2 more sources
Equivalent parameter model of 1-3 piezocomposite with a sandwich polymer
Results in Physics, 2018 A theoretical model was developed to investigate the performance of 1-3 piezoelectric composites with a sandwich polymer. Effective parameters, such as the electromechanical coupling factor, longitudinal velocity, and characteristic acoustic impedance of
Yanjun Zhang, Likun Wang, Lei Qin
doaj +1 more source
, 2013 Underwater acoustic transducers often include a stack of thickness polarized piezoelectric material pieces of alternating polarity interspersed with electrodes, bonded together and electrically connected in parallel.
Markley, Douglas C. +2 more
core +1 more source
Characterization of Epoxy Resin (SU-8) Film Using Thickness-Shear Mode (TSM) Resonator under Various Conditions [PDF]
, 2004 Characterization of an epoxy resin film, commonly known as SU-8, is presented using thickness shear mode (TSM) quartz resonator. The impedance-admittance characteristics of the equivalent circuit models of the unperturbed and coated resonators are ...
Cernosek, Richard +3 more
core +2 more sources
Piezoelectric Wafer Active Sensor Transducers for Acoustic Emission Applications
Sensors, 2023 Piezoelectric materials are defined by their ability to display a charge across their surface in response to mechanical strain, making them great for use in sensing applications.
Connor Griffin, Victor Giurgiutiu
doaj +1 more source