Impedance Spectroscopy for Enhanced Data Collection of Conductometric Soot Sensors

Middelburg, L.M.; Ghaderi, Mohammadamir; Bilby, David; Visser, J.H.; Zhang, Kouchi; Wolffenbuttel, R.F.

doi:10.1109/ISIE45063.2020.9152484

Impedance Spectroscopy for Enhanced Data Collection of Conductometric Soot Sensors

Title

Impedance Spectroscopy for Enhanced Data Collection of Conductometric Soot Sensors

Author

Middelburg, L.M. (TU Delft Electronic Components, Technology and Materials)
Ghaderi, Mohammadamir (Chalmers University of Technology)
Bilby, David (Ford Motor Company)
Visser, J.H. (Ford Motor Company)
Zhang, Kouchi (TU Delft Electronic Components, Technology and Materials)
Wolffenbuttel, R.F. (Chalmers University of Technology)

Date

2020

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.

Subject

Particulate matter sensing
exhaust gas after-treatment
impedance spectroscopy
on-board diagnostics
resistive soot sensor

To reference this document use:

http://resolver.tudelft.nl/uuid:ba33cb44-6547-401d-b1a2-1cb0a83a0221

DOI

https://doi.org/10.1109/ISIE45063.2020.9152484

Publisher

IEEE

ISBN

978-1-7281-5635-4

Source

2020 IEEE 29th International Symposium on Industrial Electronics (ISIE)