Results 11 to 20 of about 251,123 (306)

A Phase Correlation Anti-Noise Displacement Estimation Method Based on PSD Phase Screening

open access: yesApplied Sciences, 2022
When using digital images to obtain the displacement of a structure, noise is always a factor that greatly affects the accuracy of the displacement results.
Yunsheng Zhang   +5 more
doaj   +2 more sources

Comparative Analysis of Additional Measurement Error Introduced by Inductive Current Transformers, Rogowski Coils and Electronic Current Transducer for Harmonics of Distorted Current [PDF]

open access: yesSensors
This paper investigates the accuracy of conventional inductive current transformers (iCTs) and Rogowski coils (RCs) in measuring distorted currents, evaluating compliance with the WB0 (up to the 13th harmonic) and WB1 (up to the 60th harmonic) accuracy ...
Michal Kaczmarek   +2 more
doaj   +2 more sources

Sinusoidal phase-modulation interferometer capable of measuring 1D displacement and 2D in-plane displacement [PDF]

open access: yesEPJ Web of Conferences
Interferometers for displacement measurement with picometer resolution are required. The main cause of degradation of interferometer resolution is air fluctuation. To investigate the effect of air fluctuation on displacement resolution, we have developed
Aketagawa Masato   +3 more
doaj   +2 more sources

Relative permeability model of polymer particle dispersed phase for oil displacement based on fractal theory [PDF]

open access: yesYouqicang pingjia yu kaifa
In the later stage of water injection development, the rapid increase in water content significantly degrades the development performance of water drive reservoirs.
CUI Chuanzhi, SUI Yingfei, WANG Yidan, WU Zhongwei, LI Jing
doaj   +4 more sources

Methodology for determining angular displacement in three-phase transformers

open access: yesTecnoLógicas, 2017
This paper presents methodology for determining angular displacement (connections or vector group (colloquial)) in three-phase transformers. The proposed methodology is useful to determine the angular displacement if connections are known or the ...
Nicolás Muñoz-Galeano   +2 more
doaj   +3 more sources

Determining the Amount of Earthquake Displacement Using Differential Synthetic Aperture Radar Interferometry (D-InSAR) and Satellite Images of Sentinel-1 A: A Case Study of Sarpol-e Zahab City [PDF]

open access: yesAdvances in Engineering and Intelligence Systems, 2022
One of the effects of an earthquake is the creation of displacement on the land surface. It’s important to determine displacement due to natural disasters such as earthquakes.
Jacob Cherian
doaj   +1 more source

Low-Power Voltage Transformer Smart Frequency Modeling and Output Prediction up to 2.5 kHz, Using Sinc-Response Approach

open access: yesSensors, 2020
The instrument transformers scenario is moving towards the adoption of a new generation of low-power instrument transformers. This disruptive change also requires that the modeling, characterization, and testing of those devices must be improved ...
Abbas Ghaderi   +3 more
doaj   +1 more source

Calibration Procedure to Test the Effects of Multiple Influence Quantities on Low-Power Voltage Transformers

open access: yesSensors, 2020
The article presents a study on low-power voltage transformers (LPVTs). Considering their increasing spread among Smart Grids, it is fundamental to assess their accuracy behavior in as realistic conditions as possible.
Alessandro Mingotti   +2 more
doaj   +1 more source

Stability and Resolution of a Conventional Displacement Measuring Heterodyne Interferometer Using a Single Phase-Locked Loop

open access: yes, 2023
Background: Heterodyne interferometry offers an exciting solution for achieving sub-nanometer or ten-picometer-order mechanical displacement measurements because of its high resolution and noise immunity.
Thanh Dong Nguyen   +3 more
core   +1 more source

Phase Converter of Composing Displacement

open access: yesBulletin of the South Ural State University. Ser. Computer Technologies, Automatic Control & Radioelectronics, 2016
Minimax strategy of mechatronic converters efficiency improving relative to error decrease with velocity increase at the same time provides common dataware level rise. The analysis of usage possibilities of different type position transducers (PT) gives the advantages of resolvers.
SMIRNOV YU.S.   +4 more
openaire   +4 more sources

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