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Proceedings Paper

Application of thermistor effect intelligent ozone sensors
Author(s): Tadeusz Habdank-Wojewodzki; Tadeusz Pisarkiewicz; Przemyslaw Potempa; Seweryn Habdank-Wojewodzki
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Paper Abstract

When constructing ozone sensor one should consider dynamics of circuit inputs and of circuit itself. That dynamics is related to heat capacity conductivity of sensors substrate and case. Physical parameters are described as an implicit functions but we can use simplified model to resolve input space. During measurement stochastic parameters like humidity, medium temperature, medium flow velocity should be observed, due to their influence on heat conductivity and convection. When PID controller with two state output was used to stabilize temperature, regardless of constant input parameters at system output appeared binary noise. That phenomenon is related to temperature sensitivity of semiconductor layer which is higher than sensitivity of PID controller. That sensitivity causes amplification of controller output signal changes. Solution of that problem are physical models based estimators.

Paper Details

Date Published: 30 April 1999
PDF: 7 pages
Proc. SPIE 3730, Optoelectronic and Electronic Sensors III, (30 April 1999); doi: 10.1117/12.346853
Show Author Affiliations
Tadeusz Habdank-Wojewodzki, Univ. of Mining and Metallurgy (Poland)
Tadeusz Pisarkiewicz, Univ. of Mining and Metallurgy (Poland)
Przemyslaw Potempa, Univ. of Mining and Metallurgy (Poland)
Seweryn Habdank-Wojewodzki, Univ. of Mining and Metallurgy (Poland)

Published in SPIE Proceedings Vol. 3730:
Optoelectronic and Electronic Sensors III
Antoni Nowakowski; Bogdan Chachulski, Editor(s)

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