Method, computer program product and system

Patent metadata

Field	Value
Publication number	US-10677685-B2
Application number	US-201314781929-A
Country	US
Kind code	B2
Filing date	Apr 5, 2013
Priority date	Apr 5, 2013
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A method for processing data obtained from a condition monitoring system, which comprises the step of obtaining dynamic signal data in the form of a time waveform and/or a Fast Fourier Transform (FFT) from at least one sensor. The method comprises the step of extracting at least two parameters from the time waveform and/or FFT and transmitting or displaying the at least two parameters instead of the dynamic signal time waveform data and/or a Fast Fourier Transform (FFT).

First claim

The invention claimed is:

1. A method for processing dynamic signal data obtained from a condition monitoring system, the method comprising:
obtaining the dynamic signal data in a form of at least one of an acoustic emission enveloping time waveform and a Fast Fourier Transform (FFT) from an acoustic emission enveloping sensor of the condition monitoring system, the acoustic emission enveloping sensor coupled to a component;
extracting at least two parameters from the at least one of the acoustic emission enveloping time waveform and the Fast Fourier Transform FFT, the at least two parameters comprising peak-to-peak values and root means squared values and counts with low, medium, and high thresholds;
transmitting and displaying the at least two parameters instead of at least one of the acoustic emission enveloping time waveform data and the Fast Fourier Transform (FFT); and
electronically recording the at least two parameters in a database with respect to residual life data gathered in the database for the component, the residual life data comprising information about relationships between types or environments of usage versus rates of change of residual life for the component,
wherein the at least two parameters are used to predict of the residual life of the component as a residual life prediction, the residual life prediction being provided to another database that provides notifications of when to service, replace, or refurbish the component, the residual life prediction is utilized to determine a cost of intervention by a reduction in a risk cost implicit in continued operation of the component,
wherein the component is serviced, replaced, or refurbished in accordance with the notification and the cost of intervention.

2. The method according to claim 1 , wherein the step of extracting at least two parameters is carried out using one of: Discrete Wavelet Transform (DWT), Continuous Wavelet Transform (CWT) or another time domain analysis.

3. The method according to claim 1 , wherein the at least two parameters comprises: quantitative or statistical parameters, a peak-to-peak amplitude as one or the peak-to-peak values, a root mean squared amplitude as one or the root mean squared values, a statistical value, a maximum statistical value, a minimum statistical value, a mean statistical value, a median statistical value, a Crestfactor, a Kurtosis, threshold crossing event counts as one or the root mean squared counts, periodicity of events values, wavelet-derived amplitudes, wavelet-derived parameters, FFT-derived amplitudes, FFT-derived parameters, harmonic activity, and sideband activity.

4. The method according to claim 1 , wherein the an acoustic emission enveloping sensor obtains data comprising: vibration, vibration enveloping, acoustic emission, acoustic emission enveloping, temperature, a rolling contact force, a rolling contact stress, high frequency stress waves, a lubricant condition, rolling surface damage, an operating speed, a load carried, lubrication conditions, humidity, exposure to moisture, exposure to ionic fluids, exposure to mechanical shocks, corrosion, fatigue damage, and wear.

5. The method according to claim 1 , wherein the at least two parameters are transmitted wirelessly over a wireless communication network.

6. The method according to claim 1 , wherein the condition monitoring system is arranged to monitor at least one bearing.

7. The method according to claim 1 , wherein the condition monitoring system is arranged to monitor at least rolling element bearing.

8. A computer program product comprising a non-transitory computer readable medium comprising computer program code for possessing dynamic signal data obtained from a condition monitoring system, the computer program code causing a processor to execute:
obtaining the dynamic signal data in the form of at least one of an acoustic emission enveloping time waveform and a Fast Fourier Transform (FFT) from an acoustic emission enveloping sensor of the condition monitoring system, the acoustic emission enveloping sensor coupled to a component;
extracting at least two parameters from the at least one of the acoustic emission enveloping time waveform and the Fast Fourier Transform FFT, the at least two parameter comprising peak-to-peak values and root means squared values and counts with low, medium, and high thresholds;
transmitting and displaying the at least two parameters instead of at least one of the acoustic emission enveloping time waveform data and the Fast Fourier Transform (FFT); and
electronically recording the at least two parameters in a database with respect to residual life data gathered in the database for the component, the residual life data comprising information about relationships between types or environments of usage versus rates of change of residual life for the component,
wherein the at least two parameters are used to predict of the residual life of the component as a residual life prediction, the residual life prediction being provided to another database that provides notifications of when to service, replace, or refurbish the component,
wherein the component is serviced, replaced, or refurbished in accordance with the notification.

9. A system for processing dynamic signal data obtained from a condition monitoring system, the system comprising:
a database;
an acoustic emission enveloping sensor coupled to a component and providing the dynamic signal data in the form of one of: a time waveform or a Fast Fourier Transform (FFT);
a processing unit arranged to extract at least two parameters from at least one of: the acoustic emission enveloping time waveform and Fast Fourier Transform (FFT), the at least two parameter comprising peak-to-peak values and root means squared values and counts with low, medium, and high thresholds; and
a transmission system arranged to transmit and a display system arranged to display the at least two parameters instead of at least one of the acoustic emission enveloping time waveform data and the Fast Fourier Transform (FFT); and
electronically recording the at least two parameters in the database with respect to residual life data gathered in the database for the component, the residual life data comprising information about relationships between types or environments of usage versus rates of change of residual life for the component,
wherein the at least two parameters are used to predict of the residual life of the component as a residual life prediction, the residual life prediction being provided to another database that provides notifications of when to service, replace, or refurbish the component, the residual life prediction is utilized to determine a cost of intervention by a reduction in a risk cost implicit in continued operation of the component,
wherein the component is serviced, replaced, or refurbished in accordance with the notification and the cost of intervention.

10. The system according to claim 9 , wherein the processing unit is arranged to extract the at least two parameters using one of: a Discrete Wavelet Transform (DWT), a Continuous Wavelet Transform (CWT) or another time domain analysis.

11. The system according to claim 9 , wherein the at least two parameters comprises: quantitative or statistical parameters, a peak-to-peak amplitude as one or the peak-to-peak values, a root mean squared amplitude as one or the root mean squared values, a statistical value, a maximum statistical value, a minimum statistical value, a mean statistical value, a median statistical value, a Crestfactor, a Kurtosis, threshold crossing event counts as one or the root mean squared counts, periodicity of events values, wavelet-derived amplitudes, wavele

Assignees

• Skf Ab

Inventors

• Thomson Allan

Classifications

• G01N29/46

  by spectral analysis, e.g. Fourier analysis {or wavelet analysis (spectral signal processing per se G06F17/14)} · CPC title

• G01M13/045 Primary

  Acoustic or vibration analysis · CPC title

• G01N2291/2696

  Wheels, Gears, Bearings · CPC title

• G01N29/14

  using acoustic emission techniques {(echo of particles G01N29/046; measuring mechanical vibrations or acoustic waves in solids in general G01H1/00)} · CPC title

• G01M13/04 Primary

  Bearings · CPC title