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Proceedings Paper

Extraction and evaluation of gas-flow-dependent features from dynamic measurements of gas sensors array
Author(s): Paweł Kalinowski; Łukasz Woźniak; Grzegorz Jasiński; Piotr Jasiński
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Paper Abstract

Gas analyzers based on gas sensors are the devices which enable recognition of various kinds of volatile compounds. They have continuously been developed and investigated for over three decades, however there are still limitations which slow down the implementation of those devices in many applications. For example, the main drawbacks are the lack of selectivity, sensitivity and long term stability of those devices caused by the drift of utilized sensors. This implies the necessity of investigations not only in the field of development of gas sensors construction, but also the development of measurement procedures or methods of analysis of sensor responses which compensate the limitations of sensors devices. One of the fields of investigations covers the dynamic measurements of sensors or sensor-arrays response with the utilization of flow modulation techniques. Different gas delivery patterns enable the possibility of extraction of unique features which improves the stability and selectivity of gas detecting systems. In this article three utilized flow modulation techniques are presented, together with the proposition of the evaluation method of their usefulness and robustness in environmental pollutants detecting systems. The results of dynamic measurements of an commercially available TGS sensor array in the presence of nitrogen dioxide and ammonia are shown.

Paper Details

Date Published: 10 November 2016
PDF: 8 pages
Proc. SPIE 10161, 14th International Conference on Optical and Electronic Sensors, 101610M (10 November 2016); doi: 10.1117/12.2247541
Show Author Affiliations
Paweł Kalinowski, Gdansk Univ. of Technology (Poland)
Łukasz Woźniak, Gdansk Univ. of Technology (Poland)
Grzegorz Jasiński, Gdansk Univ. of Technology (Poland)
Piotr Jasiński, Gdansk Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 10161:
14th International Conference on Optical and Electronic Sensors
Piotr Jasiński, Editor(s)

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