1.4.3 The EMD Based IMF Analysis of Gas Sensor Dynamic Signals

Guangfen Wei, Shutian Wei & Wen An
Temperature modulation has been proved an efficient technique for improving the selectivity of gas sensors. However, it suffers from the complex and subjective feature extraction processes. This paper introduces the empirical mode decomposition (EMD) method to obtain the intrinsic mode functions (IMFs) of the dynamic signals from the modulated gas sensor system. Instantaneous spectrum and its spectrum peaks are extracted from the IMFs as meaningful features, which not only improve the classification and quantification performance,...