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A fault diagnosis framework for centrifugal pumps by scalogram-based imaging and deep learning.

Hasan, Md. Junayed; Rai, Akhand; Ahmad, Zahoor; Kim, Jong-Myon


Akhand Rai

Zahoor Ahmad

Jong-Myon Kim


Centrifugal pumps are the most vital part of any process industry. A fault in centrifugal pump can affect imperative industrial processes. To ensure reliable operation of the centrifugal pump, this paper proposes a novel automated health state diagnosis framework for centrifugal pump that combines a signal to time-frequency imaging technique and an Adaptive Deep Convolution Neural Network model (ADCNN). First, the vibration signals corresponding to different health conditions of the centrifugal pump are acquired. Vibration signals obtained from the centrifugal pump carry a great deal of information and generally, statistical features are extracted from the vibration signals to retain meaningful fault information. However, these features are either insensitive to weak incipient faults or unsuitable for tracking severe faults, thus, decreasing the fault classification accuracy. To tackle this problem, a signal to time-frequency imaging technique is applied to the pump vibration signals. For this purpose, Continuous Wavelet Transform (CWT) is applied to decompose the vibration signals over different time-frequency scales and extract the pump fault information in both the time and frequency domains. The CWT scales form two-dimensional time-frequency images commonly referred to as scalograms. The CWT scalograms are then converted into grayscale images (SGI). Over the past few decades, CNN models have been established as an effective practice to process images for classification and pattern recognition. Consequently, the extracted CWTSGIs are finally provided as inputs to the proposed ADCNN architecture to achieve feature extraction and classification for centrifugal pump faults. The performance of the proposed diagnostic framework (CWTSGI + ADCNN) is validated with a vibration dataset collected from a testbed specifically designed for centrifugal pump diagnosis. The experimental results suggest that the proposed technique based on CWTSGI and ADCNN outperformed existing methods with an average performance improvement of 4.7 - 15.6%.


HASAN, M.J., RAI, A., AHMAD, Z. and KIM, J.-Y. 2021. A fault diagnosis framework for centrifugal pumps by scalogram-based imaging and deep learning. IEEE access [online], 9, pages 58052-58066. Available from:

Journal Article Type Article
Acceptance Date Apr 9, 2021
Online Publication Date Apr 13, 2022
Publication Date Dec 31, 2021
Deposit Date May 13, 2022
Publicly Available Date May 30, 2022
Journal IEEE Access
Electronic ISSN 2169-3536
Publisher IEEE Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 9
Pages 58052-58066
Keywords Centrifugal pump; Continuous wavelet transformations; Scalogram; Gray images; Convolutional neural
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