pp. 209-217
S&M761 Research Paper of Special Issue https://doi.org/10.18494/SAM.2009.608 Published: July 21, 2009 EStudy on Feature Extraction of Semiconductor Gas Sensor Based on Prony's Method [PDF] Yoshinori Takei, Shin Koyama, Hidehito Nanto and Takashi Mihara (Received February 7, 2009; Accepted April 10, 2009) Keywords: semiconductor gas sensor, feature extraction, Prony's method
In this study, feature extraction from a transient response of a semiconductor gas sensor is investigated. For the sensor response given as the step response of the first-order lag system, the sensor output can be approximated as a sum of exponentials by Prony’s method. The model parameters can be estimated as the time constant and the gain, which are inherent parameters for each gas. The parameters can be used as features for the discrimination of gases. Using the extracted features, the discrimination of gases will be achieved even if only a single sensor is used. The parameter estimation procedure is basically an offline algorithm. We will then show an online estimation procedure for feature extraction with a low computational burden.
Corresponding author: Yoshinori TakeiCite this article Yoshinori Takei, Shin Koyama, Hidehito Nanto and Takashi Mihara, EStudy on Feature Extraction of Semiconductor Gas Sensor Based on Prony's Method, Sens. Mater., Vol. 21, No. 4, 2009, p. 209-217. |