CJCU

Chem. J. Chinese Universities ›› 2006, Vol. 27 ›› Issue (1): 55.

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Studies on Blind Separation of Gas Sensor Array Signals

WEI Guang-Fen1, TANG Zhen-An 1* , CHAN Philip C. H.2, YU Jun1, WANG Li-Ding1, YAN Gui-Zhen3   

  1. 1. Research Center for Micro Systems, Dalian University of Technology, Dalian 116024, China;
    2. Department of Electrical and Electronic Engineering, Hong Kong University of Science and Technology, Hong Kong, China;
    3. Institute of Microelectronics, Peking University, Beijing 100871, China
  • Received:2004-11-23 Online:2006-01-10 Published:2006-01-10
  • Contact: TANG Zhen-An, E-mail: tangza@dlut.edu.cn

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Abstract:

Responses of a Micro-hotplate based integrated gas sensor array to CO and CH4 were measured with an automated gas sensor calibration system. Combining with the blind source separation(BSS) techniques, the blind separability in gas mixture analysis was discussed. The widely used BSS approach-Independent Component Analysis(ICA) was adopted to verify the proposed method by analyzing the gas mixtures of CO and CH4. The analysis results demonstrate that BSS was an effective way to extract the information of gas components in mixtures, from which the gas concentrations can be estimated. The average relative quantification errors were 9.37% and 8.11% for CO and CH4, respectively, in the specified concentration ranges.

Key words: Blind source separation; Gas sensor array; Gas mixture analysis; Independent component analysis

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