HE Ai-xiang, TANG Zhen-an, WEI Guang-fen, et al. Study on dynamic signal recognition of gas sensor based on temperature modulation[J]. 2015, 34(6): 24-26.
HE Ai-xiang, TANG Zhen-an, WEI Guang-fen, et al. Study on dynamic signal recognition of gas sensor based on temperature modulation[J]. 2015, 34(6): 24-26. DOI: 10.13873/J.1000-9787(2015)06-0024-03.
Present a method for identifying three different kinds of industrial gases( CO
CH4 and C2H5OH)
the sensor array consists of 4 Sn O2 micro hotplate gas sensor doped Pt. Micro hotplate sensor heater adopts triangle wave
sine wave
saw tooth wave and pulse wave respectively. Then feature information of sensor dynamic response signal is extracted with short-time Fourier transform and combined with principal component analysis method
feature information is processed by dimensionality reduction
it is found that the influence of modulation period on gas species is smaller. Finally
three different gases are recognized by decision tree
recognition accuracy rate is high. Experimental result proves the correctness and feasibility of the algorithm.
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references
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