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Listar por palabra clave "Wavelet transforms"

Mostrando ítems 1-14 de 14

A feature extraction software tool for agricultural object-based image analysis

Ruiz Fernández, Luis Ángel; Recio Recio, Jorge Abel; Fernández-Sarría, Alfonso; Hermosilla, T. (Elsevier, 2011-05-01)

A software application for automatic descriptive feature extraction from image-objects, FETEX 2.0, is presented and described in this paper. The input data include a multispectral high resolution digital image and a vector ...
A General Approach for the Transient Detection of Slip-Dependent Fault Components Based on the Discrete Wavelet Transform

Riera-Guasp, Martín; Antonino-Daviu, J.; Pineda-Sanchez, Manuel; Puche-Panadero, Rubén; Pérez-Cruz, Juan (Institute of Electrical and Electronics Engineers, 2008)

[EN] In this paper, a general methodology based on the application of discrete wavelet transform (DWT) to the diagnosis of the cage motor condition using transient stator currents is exposed. The approach is based on ...
Adaptive multiresolution non-local means filter for 3D magnetic resonance image denoising

Coupé ., Pierrick; Manjón Herrera, José Vicente; Robles Viejo, Monserrat; Collins ., Louis (Institution of Engineering and Technology (IET), 2012-07)

In this study, an adaptive multiresolution version of the blockwise non-local (NL)-means filter is presented for three-dimensional (3D) magnetic resonance (MR) images. On the basis of an adaptive soft wavelet coefficient ...
Advanced Rotor Fault Diagnosis for Medium-Voltage Induction Motors Via Continuous Transforms

Antonino-Daviu, J.; Pons Llinares, Joan; Lee, Sang Bin (Institute of Electrical and Electronics Engineers, 2016)

[EN] Anumber of field case studies for rotor fault diagnosis on medium-voltage induction motors operating in a petrochemical plant are presented in this paper. The methodology employed is based on analyzing the induction ...
Electrical monitoring under transient conditions: a new paradigm in electric motors predictive maintenance

Antonino Daviu, José Alfonso (MDPI AG, 2020-09)

[EN] Electric motors condition monitoring is a field of paramount importance for industry. In recent decades, there has been a continuous effort to investigate on new techniques and methods that are able to determine the ...
Evaluation of the detectability of electromechanical faults in induction motors via transient analysis of the stray flux

Ramirez-Nunez, Juan A.; Antonino-Daviu, Jose; Climente Alarcon, Vicente; Quijano-Lopez, Alfredo; Razik, Hubert; Osornio-Rios, Roque A.; Romero-Troncoso, Rene J. (Institute of Electrical and Electronics Engineers, 2018)

[EN] The stray flux that is present in the vicinity of an induction motor is a very interesting information source to detect several types of failures in these machines. The analysis of this quantity can be employed, in ...
Induction Motor Diagnosis based on a Transient Current Analytic Wavelet Transform via Frequency B-Splines

Pons Llinares, Joan; Antonino Daviu, J.; Riera-Guasp, Martín; Pineda Sánchez, Manuel; Climente Alarcón, Vicente (Institute of Electrical and Electronics Engineers (IEEE), 2011-05)

[EN] In this paper, a new induction motor diagnosis methodology is proposed. The approach is based on obtaining a 2-D time–frequency plot representing the time–frequency evolution of the main components in an electrical ...
Influence of the start-up system in the diagnosis of faults in the rotor of induction motors using the Discrete Wavelet Transform

Corral Hernández, Jesús Ángel; Antonino Daviu, José Alfonso (Elsevier, 2016)

[EN] In previous articles, both the procedure and the advantages of the use of advanced mathematical tools,(as for example the Discrete Wavelet Transforms (DWT) and the continuous wavelet transforms (CWT)), for the ...
Mixed eccentricity diagnosis in Inverter-Fed Induction Motors via the Adaptive Slope Transform of transient stator currents

Pons Llinares, Joan; Antonino-Daviu, J.; Roger-Folch, José; Moriñigo Sotelo, Daniel; Duque Pérez, Oscar (Elsevier, 2014)

[EN] This paper researches the detection of mixed eccentricity in Inverter-Fed Induction Motors. The classic FFT method cannot be applied when the stator current captured is not in steady state, which is very common in ...
Operation of the Discrete Wavelet Transform: basic overview with examples

Antonino Daviu, José Alfonso (Universitat Politècnica de València, 2013-07-08)

This learning object describes the operation of the Discrete Wavelet Transform under an engineering perspective, without deepening in complex mathematical details. It includes several didactic examples that illustrate the ...
Pursuing optimal electric machines transient diagnosis: The adaptive slope transform

Pons Llinares, Joan; Riera-Guasp, Martín; Antonino-Daviu, José Alfonso; Habetler, TG (Elsevier, 2016)

[EN] The aim of this paper is to introduce a new linear time-frequency transform to improve the detection of fault components in electric machines transient currents. Linear transforms are analysed from the perspective of ...
Reliable Detection of Rotor Winding Asymmetries in Wound Rotor Induction Motors via Integral Current Analysis

Antonino-Daviu, J.; Quijano Lopez, Alfredo; Climente Alarcón, Vicente; Garín-Abellán, Carlos (Institute of Electrical and Electronics Engineers, 2017)

[EN] Current analysis has been widely employed in academy and industry for the diagnosis of rotor damages in cage induction motors. The conventional approach based on the FFT analysis of steady-state current (MCSA) has ...
Transient motor current signature analysis via modulus of the continuous complex wavelet: A pattern approach

Pineda Sánchez, Manuel; Riera Guasp, Martín; Pérez Cruz, Juan; Puche Panadero, Rubén (Elsevier, 2013-09)

[EN] In this paper a new method to perform Transient Motor Current Signature analysis (TMCSA), based on the Continuous Complex Wavelet Transform (CCWT) of the line current, is presented. TMCSA is a powerful online method ...
Transient-Based Rotor Cage Assessment in Induction Motors Operating With Soft Starters

Corral Hernández, Jesús Ángel; Antonino-Daviu, J.; Pons Llinares, Joan; Climente Alarcón, Vicente; Francés-Galiana, Vicente (Institute of Electrical and Electronics Engineers, 2015)

[EN] The reliable assessment of the rotor condition in induction motors is a matter of increasing concern in the industry. Although rotor damages are more likely in line-started motors operating under high inertias, some ...