Low-Oscillation Complex Wavelets

Addison, Paul; Watson, James N.; Tian, Feng

doi:10.1006/jsvi.2001.4119

Cited by 115 publications

(67 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Different wavelets serve different purposes. In this application, we used the Daubechies wavelet [18] and the Morlet wavelet [19], [20] for the fault diagnosis of mass unbalance and gear, respectively.…”

Section: Resultsmentioning

confidence: 99%

Application of Wavelet Transform for Fault Diagnosis in Rotating Machinery

Bendjama¹,

Bouhouche²,

Boucherit³

2012

IJMLC

View full text Add to dashboard Cite

Abstract-Vibration analysis is essential in improving condition monitoring and fault diagnostics of rotating machinery. Many signal analysis methods are able to extract useful information from vibration data. Currently, the most of these methods use spectral analysis based on Fourier Transform (FT). However, these methods present some limitations; it is the case of non-stationary signals. In the present work, we are interested to the vibration signal analysis by the Wavelet Transform (WT). The WT is one of the most important methods for signal processing; it is especially suitable for non-stationary vibration measurements obtained from accelerometer sensors. The monitoring results indicate that the WT can diagnose the abnormal change in the measured data.

show abstract

Section: Resultsmentioning

confidence: 99%

Application of Wavelet Transform for Fault Diagnosis in Rotating Machinery

Bendjama¹,

Bouhouche²,

Boucherit³

2012

IJMLC

View full text Add to dashboard Cite

show abstract

“…The Wavelet technique is more and more used in the analysis and the synthesis of the sounds, due to the advantages with respect to the fast Fourier transform [8].…”

Section: Methods Of Processing Acoustic Signalsmentioning

confidence: 99%

Monitoring power breakers using vibro acoustic techniques

Bălan¹,

Varodi²,

Buzdugan³

2017

Adv. sci. technol. eng. syst. j.

View full text Add to dashboard Cite

“…In practice, it becomes negligible for values of ω 0 > 5. Previous investigators have concentrated on wavelet transforms with ω 0 in the range 5-6, where it can be performed without the correction term since it becomes very small [7].…”

Section: Time-frequency Analysismentioning

confidence: 99%

“…This method has seen growing importance in research in pile integrity tests in recent years. The time-frequency analysis of the wavelet transform application for low-strain integrity testing was first researched at Napier University, Edinburgh [7]. Joint time-frequency analysis was applied to explore the time-frequency component of the pile testing result successfully, and showed better resolution than traditional time and frequency methods [8].…”

Section: Introductionmentioning

confidence: 99%

Non-destructive test for pile beneath bridge in the time, frequency, and time-frequency domains using transient loading

Yan

2010

Nonlinear Dyn

View full text Add to dashboard Cite

The main objective of this paper is to evaluate the capabilities of non-destructive test (NDT) methods by using transient loading, i.e. the sonic echo (SE) method in the time domain and the impulse response (IR) method in the frequency domain, in detecting the pile length in the foundations of bridges. Methods such as these, which are based on transient elastic waves, have been used for many years. However, several drawbacks have been described in the literature, including difficulties with the installation of the testing devices. In this paper, several experimental studies were carried out on existing scoured bridge pile foundations. In order to overcome environmental limitations, the Ultrasonic Pulse Velocity method was adopted, and the installation procedure for the testing devices was modified. Moreover, a recently developed numerical signal processing tool, the Wavelet Transform (WT), was adopted to interpret the testing signal in the time-frequency domain. The results indicate that the modified testing procedure is feasible for in-service pile integrity tests. The processed signal clearly and visually illustrates the temporal changes, and the pile tip can be highlighted in the timefrequency domain. The depth of the scour pile tips can be detected precisely with the proposed modified device installation and the improved numerical signal processing. The results in the time-frequency domain are also consistent with traditional SE/IR testing methods.

show abstract

Low-Oscillation Complex Wavelets

Cited by 115 publications

References 58 publications

Application of Wavelet Transform for Fault Diagnosis in Rotating Machinery

Application of Wavelet Transform for Fault Diagnosis in Rotating Machinery

Monitoring power breakers using vibro acoustic techniques

Non-destructive test for pile beneath bridge in the time, frequency, and time-frequency domains using transient loading

Contact Info

Product

Resources

About