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Application of a gas sensors array to the detection of fuel as contamination defect in engine oil

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7 Author(s)
Capone, S. ; Inst. of Microelectron. & Microsyst., CNRIMM, Lecce ; Zuppa, M. ; Montagna, G. ; Siciliano, P.
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In this work we proposed a system based on metal oxide gas micro-sensors to estimate diesel or gasoline contamination in different engine oil samples. The gas-sensing layers (undoped, Pt, Pd, Rh-doped SnO2, In2O3 and mixed In2O3-SnO2) have been synthetized by the sol-gel method and deposited by spin-coating onto 2 mm times 2 mm silicon substrates equipped by Pt heater on the back and Pt interdigitated electrodes on the front. The sensor array has been exposed to no-used and used commercial engine oil samples contaminated with different amounts of unburned fuel. The results of data analysis (DWT-based feature extraction, PCA and Gaussian mixture model classifier (GMM)) showed that different fuel contaminated used engine oils can be discriminated and successfully classified by the sensor array.

Published in:

Sensors, 2008 IEEE

Date of Conference:

26-29 Oct. 2008

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