Gas mixture analysis with dynamic gas sensor array signals

A new gas mixture analysis method with dynamic sensor array signals is proposed based on. the Independent Component Analysis (ICA). The array responses to gas mixture components are first extracted through ICA algorithm as the Independent Components (ICs). The independent components in response of gas mixture component are then studied as an individual sensor signals in response to a individual gas. Time-dependent signals are obtained from a micro-hotplate (MHP) based integrated gas. sensor array. Samples of CO, NO2 and their binary gas mixtures are chosen to analyse the sensor array signals using the ICA method. It is demonstrated that ICA could extract the independent gas components in the gas mixture. Results show that the new dynamic signal processing method is quite effective for sensor array data fusion. Such a gas sensor array is a useful device to enhance the selectivity of gas detectors