Gas Mixture Analysis Based on Metal-Oxide Semiconductor gas sensors with Temperature Modulated Method

To analyze the compounds in a gas mixture is difficult because of the low selectivity of gas sensors. In this research, we propose a temperature modulated method which operates the sensing film with a low frequency triangular heater voltage. The proposed method was validated for classifying methanol...

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Bibliographic Details
Published in2019 IEEE International Symposium on Olfaction and Electronic Nose (ISOEN) pp. 1 - 4
Main Authors Wen, Wei-Chih, Liu, Yen-Tung, Tang, Kea-Tiong
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2019
Subjects
Ethanol
gas mixture analysis
Gases
Heating systems
Metal-oxide gas sensor
Methanol
MOX
Sensor phenomena and characterization
temperature modulated method
Temperature sensors
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Summary:To analyze the compounds in a gas mixture is difficult because of the low selectivity of gas sensors. In this research, we propose a temperature modulated method which operates the sensing film with a low frequency triangular heater voltage. The proposed method was validated for classifying methanol, ethanol, and mixture of both, with different concentrations. The experiment results show that the proposed method can reach 97.7% accuracy with only two sensors, comparing to the 94.4% of traditional constant temperature method with six sensors.
DOI:10.1109/ISOEN.2019.8823144