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A novel approach for measuring nanometric displacements by correlating speckle interferograms
(Elsevier, 2018-11)
Recently, two phase evaluation methods were proposed to measure nanometric displacements by means of digital speckle pattern interferometry when the phase changes introduced by the deformation are in the range [0, π) rad. ...
Effect of phase transformation onset temperature on residual stress in welded thin steel plates
(2008-12)
The effect of solid-state phase transformation at low temperature on residual stresses in butt welded ferritic thin steel plates has been examined employing a finite element (FE) code. An algorithm considering the solidstate ...
Measurement of in-plane displacements using the phase singularities generated by directional wavelet transforms of speckle pattern images
(Optical Society of America, 2013-03)
We present a method to determine micro and nano in-plane displacements based on the phase singularities generated by application of directional wavelet transforms to speckle pattern images. The spatial distribution of the ...
Nano-displacement measurements of a new piezoelectric flextensional actuator by using a high dynamic range interferometry homodyne method
(IEEE, 2014-05-12)
Piezoelectric flextensional actuator (PFA) devices consist in a technology in development, with increasing number of applications in precision mechanics such as nanotechnology equipments, electronic microscopy instruments, ...
FILTERING TECHNIQUES APPLIED ON RAW CARRIER PHASE FOR GPS DETECTING SMALL DYNAMIC DISPLACEMENTS
(UNIV FEDERAL PARANA, CENTRO POLITECNICO, 2010)
This work is part of a research under construction since 2000, in which the main objective is to measure small dynamic displacements by using L1 GPS receivers. A very sensible way to detect millimetric periodic displacements ...
Distribution transformers modeling with angular displacement: actual values and per unit analysis
(Sociedade Brasileira de Automática, 2007-12-01)
In this work a detailed modeling of three-phase distribution transformers aimed at complementing well-known approaches is presented. Thus, incidence of angular displacement and tapping is taken into account in the proposed ...
Distribution transformers modeling with angular displacement: actual values and per unit analysis
(Sociedade Brasileira de Automática, 2007-12-01)
In this work a detailed modeling of three-phase distribution transformers aimed at complementing well-known approaches is presented. Thus, incidence of angular displacement and tapping is taken into account in the proposed ...
Interferometric measurements of nanometric displacements in a Piezoelectric Flextensional Actuator by using the new J1...J5 method
(IEEE, 2012-12-01)
In this work, nanometric displacement amplitudes of a Piezoelectric Flextensional Actuator (PFA) designed using the topology optimization technique and operating in its linear range are measured by using a homodyne Michelson ...