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The use of pulsed electric acoustic technique for measuring the polarization reversal in ferroelectric ceramic samples
(2002-01-01)
The pulsed electric acoustic technique, PEA, has been usually applied to probe space charge profiles in polymers. Preliminary PEA results using a ferroelectric ceramic are presented. If the reverse applied electric field ...
The use of pulsed electric acoustic technique for measuring the polarization reversal in ferroelectric ceramic samples
(2002-01-01)
The pulsed electric acoustic technique, PEA, has been usually applied to probe space charge profiles in polymers. Preliminary PEA results using a ferroelectric ceramic are presented. If the reverse applied electric field ...
Laser ultrasonics system for measurement of speed of sound in gases
(2012-06-21)
In this work we developed a setup to measure the speed of sound in gases using a laser ultrasonics system. The mentioned setup is an all optical system composed by a Q-switched Nd:YAG laser to generate the sound waves, and ...
Laser ultrasonics system for measurement of speed of sound in gases
(2012-06-21)
In this work we developed a setup to measure the speed of sound in gases using a laser ultrasonics system. The mentioned setup is an all optical system composed by a Q-switched Nd:YAG laser to generate the sound waves, and ...
Sistema para medição de distâncias horizontais na água utilizando transdutor ultrassônico
(Universidade Tecnológica Federal do ParanáToledoBrasilCurso de Engenharia EletrônicaUTFPR, 2019-06-28)
This work describes the development of a prototype of a sensor that can be embedded into an amphibious UAV (Unmanned Aerial Vehicle) to detect obstacles that can damage the UAV in case of collision. The system consists on ...
Sistema de varredura para aquisição e processamento de sinais ultrassônicos para caracterização de meios biológicos
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Engenharia Elétrica e Informática IndustrialUTFPR, 2018-08-01)
The use of ultrasound for material characterization has been applied with satisfactory results since the 50's. Such success is justified by its non-invasive and non-ionizing characteristics, as well as its low implementation ...
Inversor ressonante em comutação suave para levitação ultrassônica
(2021-12)
In this work was developed an ultrasonic resonant inverter as a power source for a power ultrasonic transducer capable of emitting acoustic waves enough to levitate small particles. It has been allied with a hypothetical ...