Impedance Spectroscopy for Enhanced Data Collection of Conductometric Soot Sensors

Conference paper (2020)

Authors

L.M. Middelburg Electronic Components, Technology and Materials - EEMCS
Mohammadamir Ghaderi Chalmers University of Technology
David Bilby Ford Motor Company
J.H. Visser Ford Motor Company
Kouchi Zhang Electronic Components, Technology and Materials - EEMCS
R.F. Wolffenbuttel Chalmers University of Technology
Research Group
Electronic Components, Technology and Materials (EEMCS) (TU Delft)
Copyright: © 2020 L.M. Middelburg, Mohammadamir Ghaderi, David Bilby, J.H. Visser, Kouchi Zhang, R.F. Wolffenbuttel
DOI: https://doi.org/10.1109/ISIE45063.2020.9152484
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Published Date

2020

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Components, Technology and Materials

Abstract

Impedance spectroscopy in the frequency range 100 Hz to 10 kHz has been applied to the Inter-Digitated Electrode (IDE) structure that is conventionally operated as a resistive sensor for the measurement of Particulate Matter (PM). The measurement of both the in-phase (resistive) and out-of-phase (capacitive) components of the impedance over this frequency range provides more data on PM as compared to DC resistance measurement only. Experimental validation confirms a more gradual change in capacitance with soot buildup as compared to the sudden reduction of resistance with dendrite formation. The effect of an additional vertical electric field for an increased capacitive sensitivity due to stimulated soot buildup has been experimentally investigated using the electrically conductive flow housing of the IDE structure as an additional suspended electrode.

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