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Progress on holographic techniques to measure real-time phase and amplitude gratings in photosensitive materials
(Iop Publishing Ltd, 2003-09-01)
In this paper we present and demonstrate a technique that allows simultaneous and independent measurement of small changes in the refractive index and the absorption coefficient produced in photosensitive materials during ...
Progress on holographic techniques to measure real-time phase and amplitude gratings in photosensitive materials
(Iop Publishing Ltd, 2003-09-01)
In this paper we present and demonstrate a technique that allows simultaneous and independent measurement of small changes in the refractive index and the absorption coefficient produced in photosensitive materials during ...
A new technique for separation of partial discharge sources and electromagnetic noise in radiofrequency measurements using energy ratios of different antennas
(Wiley-Blackwell, 2021-01-11)
One of the main tools for monitoring the condition of high voltage equipment is the measurement of partial discharges (PD). The electromagnetic (EM) radiation originated from this degradation phenomenon can be captured by ...
Using the ultrasound and instrumented indentation techniques to measure the elastic modulus of engineering materials
(CENIM, 2008)
Currently, the acoustic and nanoindentation techniques are two of the most used techniques for material elastic modulus measurement. In this article fundamental principles and limitations of both techniques are shown and ...
New signal processing approach for structural health monitoring in noisy environments based on impedance measurements
(2019-04-01)
The electro-mechanical impedance (EMI) technique is one of the most promising structural health monitoring (SHM) approaches for material damage detection, which is based on impedance measurements of low-cost piezoelectric ...
Parameters of infiltration models affected by the infiltration measurement technique and land-use
(Sociedade Brasileira de Ciência do Solo, 2022)
Digital image-stitching techniques applied to dynamic measurement of large structures
(2018-04-01)
In this work has been discussed a propose of using three-dimensional point-tracking measuring technique for measurement of large structures in which the entire field of interest could not be captured by a unique stereo-vision ...
A chromatic technique for structural damage detection under noise effects based on impedance measurements
(2019-05-31)
Structural health monitoring (SHM) based on electromechanical impedance (EMI) measurements has been extensively studied in recent years and stands out as an effective damage detection approach. The EMI method commonly uses ...
Power transformers monitoring based on electrical measurements: State of the art
(Institution of Engineering and Technology, 2018-07-10)
Faults diagnosis in power transformers has been traditionally based on the insulation resistance measurement, polarisation index, analysis of dissolved gasses in oil, dissipation/power factor measurement, and partial ...