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http://dx.doi.org/10.5369/JSST.2002.11.5.279

Classification of Indoor Environmental Gases Using Temperature Modulation  

Choi, Nak-Jin (School of Electronic & Electrical Eng., Kyungpook National Univ.)
Shim, Chang-Hyun (School of Electronic & Electrical Eng., Kyungpook National Univ.)
Song, Gap-Duk (School of Electronic & Electrical Eng., Kyungpook National Univ.)
Joo, Byung-Su (School of Electronic & Electrical Eng., Kyungpook National Univ.)
Lee, Yun-Su (School of Electronic & Electrical Eng., Kyungpook National Univ.)
Lee, Sang-Moon (School of Electronic & Electrical Eng., Kyungpook National Univ.)
Lee, Duk-Dong (School of Electronic & Electrical Eng., Kyungpook National Univ.)
Huh, Jeung-Soo (Dept. Materials Science and Metallurgy, Kyungpook National Univ.)
Publication Information
Journal of Sensor Science and Technology / v.11, no.5, 2002 , pp. 279-285 More about this Journal
Abstract
Two $SnO_2$ based sensing films(pure $SnO_2$ and $SnO_2$/Pt) and a Pt thin film for temperature sensor on an alumina substrate were designed and fabricated for classifying the indoor environmental gases. By controlling the heating power in the shape of trapezoid, unique four sensing response curves created from both $SnO_2$ film and $SnO_2$/Pt film. Then, various parameters were extracted from sensing response curves and carried out principal component analysis(PCA). The results confirm that a sensor array with the proposed operating mode was extremely effective in classifying indoor environmental gases such as $CO_2$, $C_3H_8$, $C_4H_{10}$.
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