Vibro-Acoustic Signature Comparison and Time-Warping Correction With Multi-Scale Correlation

Léonard, François; Foata, M.; Paquin, Jean-Yves

doi:10.1006/mssp.1999.1252

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…In a normal spectrogram, only the amplitude (or power) of the FFT analysis is displayed, also called the amplitude spectrogram (Leonard 2000). The relative phase information of the FFT can be equivalently used to construct a phase-time representation, which is called a phase spectrogram (Leonard 1997(Leonard , 2000Leonard et al 2000). To our knowledge, the phase spectrogram has not been used in published animal sound studies.…”

Section: Introductionmentioning

confidence: 98%

Spectrogram Analysis of Animal Sound Production

2008

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Section: Introductionmentioning

confidence: 98%

Spectrogram Analysis of Animal Sound Production

2008

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An Improved Vibration Analysis Algorithm as a Diagnostic Tool for Detecting Mechanical Anomalies on Power Circuit Breakers

Landry

Léonard

Landry

et al. 2008

IEEE Trans. Power Delivery

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Evaluation of the Technical Condition of the Active Part of the High Power Transformer Based on Measurements and Analysis of Vibroacoustic Signals

Borucki¹,

Cichoń²,

Majchrzak³

et al. 2017

Archives of Acoustics

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This article presents the results of research connected with the development and industrial use of vibroacoustic methods for the evaluation of the technical condition of the active part of transformers. The article presents the results of the analysis of vibrations generated by the high power transformer in which a defect was found on the basis of tests of oil carried out using the chromatography tests. In order to confirm the damage of the active part of this transformer, vibroacoustic measurements were performed in three states of its operation. The measurement using the classical vibroacoustic method included the registration of vibrations at the idle speed and during the load operation of the transformer. The original diagnostic method, so-called the modified vibroacoustic method, was also used during the measurement. The analysis of signals recorded using the classical vibroacoustic method was carried out in the frequency domain by indicating the amplitude of even harmonic vibrations. However, the analysis of signals measured during the commissioning of the transformer was conducted in the time-frequency domain using the short-time Fourier transform (STFT), continuous wavelet transform (CWT), and discrete wavelet transform (DWT). On the basis of the analysis of the results obtained it was stated that the increased level of vibrations of this transformer is a consequence of the loss of rigidity of the mechanical structure of its core.

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Vibro-Acoustic Signature Comparison and Time-Warping Correction With Multi-Scale Correlation

Cited by 4 publications

References 18 publications

Spectrogram Analysis of Animal Sound Production

Spectrogram Analysis of Animal Sound Production

An Improved Vibration Analysis Algorithm as a Diagnostic Tool for Detecting Mechanical Anomalies on Power Circuit Breakers

Evaluation of the Technical Condition of the Active Part of the High Power Transformer Based on Measurements and Analysis of Vibroacoustic Signals

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