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Gas identification using micro gas sensor array and neural-network pattern recognition
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DOI：10.1016/0925-4005(96)01892-8.png)
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Abstract
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In order to identify CH3SH, (CH3)(3)H, C2H5OH and CO gases in the concentration range of 0.1 to 100 ppm, a gas recognition system using a gas sensor array and neural-network pattern recognition has been fabricated. The sensor array consists of such thin film oxide semiconductor sensing materials as 1 wt% Pd-doped SnO2, 6 wt% Al2O3-doped ZnO, WO3 and ZnO. The principal component analysis and the neural-network pattern recognition analysis were used for the discrimination of gas species and concentrations. Good separation among gases and concentrations was obtained using the principal component analysis. The recognition probability of the neural-network was 100% for each 5 trials of 12 gas samples.
Keywords:
gas sensor array
power consumption
gas identification
pattern recognition
back-propagation
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