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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 72,
  • Issue 8,
  • pp. 1199-1204
  • (2018)

Fault Detection Based on Near-Infrared Spectra for the Oil Desalting Process

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Abstract

The fault detection problem of the oil desalting process is investigated in this paper. Different from the traditional fault detection approaches based on measurable process variables, near-infrared (NIR) spectroscopy is applied to acquire the process fault information from the molecular vibrational signal. With the molecular spectra data, principal component analysis was explored to calculate the Hotelling T2 and squared prediction error, which act as fault indicators. Compared with the traditional fault detection approach based on measurable process variables, NIR spectra-based fault detection illustrates more sensitivity to early failure because of the fact that the changes in the molecular level can be identified earlier than the physical appearances on the process. The application results show that the detection time of the proposed method is earlier than the traditional method by about 200 min.

© 2018 The Author(s)

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