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Reconfigurable Monitoring System for Time-Frequency Analysis on Industrial Equipment Through STFT and DWT

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5 Author(s)
Cabal-Yepez, E. ; Div. de Ingenierias, Univ. de Guanajuato, Salamanca, Mexico ; Garcia-Ramirez, A.G. ; Romero-Troncoso, R.J. ; Garcia-Perez, A.
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Nowadays industry pays much attention to prevent failures that may interrupt production with severe consequences in cost, product quality, and safety. The most-analyzed parameters for monitoring dynamic characteristics and ensuring correct functioning of systems are electric current, voltage, and vibrations. System-on-chip (SoC) design is an approach to increase performance and overcome costs during equipment monitoring. This work presents the design and implementation of a low-cost SoC design that utilizes reconfigurable hardware and a customized embedded processor for time-frequency analysis on industrial equipment through short-time Fourier transform and discrete wavelet transform. Three study cases (electric current supply to an induction motor during startup transient, voltage supply to an induction motor through a variable speed drive, and vibration signals from industrial-robot links) show the suitability of the proposed monitoring system for time-frequency analysis of different signals in distinct industrial applications, and early diagnosis and prognosis of abnormalities in monitored systems.

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Industrial Informatics, IEEE Transactions on  (Volume:9 ,  Issue: 2 )