Gas sensing device and method for operating a gas sensing device

A gas sensing device for sensing one or more gases in a mixture of gases;

• the gas sensing device comprising:
• one or more chemo-resistive gas sensors, wherein each of the gas sensors is configured for generating signal samples corresponding to a concentration of one of the one or more gases in the mixture of gases, wherein the one or more gas sensors are alternately operated in recovery phases and in sense phases, wherein at least some of the signal samples of each of the gas sensors are generated during the sense phases;
• one or more heating elements for heating the gas sensors according to one or more first temperature profiles during the recovery phases and according to one or more second temperature profiles during the sense phases, wherein for each of the gas sensors a maximum temperature of the respective first temperature profile is higher than a maximum temperature of the respective second temperature profile;
• an information extraction block configured for receiving the signal samples and for generating representations for the received signal samples for each of the gas sensors based on a plurality of features of the received signal samples of the respective gas sensor, wherein each of the features refers to a variation of dynamic characteristics of the received signal samples of the respective gas sensor over time, wherein each of the representations comprises a plurality of feature samples, wherein each of the feature samples is based on one or more of the features of the respective gas sensor;
• and
• a decision making block configured for receiving the representations, wherein the decision making block comprises a weighting block and a trained model based algorithm stage, wherein the weighting block is configured for receiving the feature samples of one of the representations and for applying one or more time-variant weighting functions to each of the feature samples of the respective representation in order to calculate for each of the representations a weighted representation comprising weighted feature samples, wherein the algorithm stage comprises an input layer and an output layer, wherein the decision making block comprises one or more trained models for the algorithm stage, wherein the weighted representations for each of the gas sensors are input to the input layer of the algorithm stage, wherein the decision making block creates for each of the gas sensors sensing results based on output values of the output layer of the algorithm stage, wherein the output values for each of the gas sensors are created by using at least one of the one or more trained models at the algorithm stage so that the output values for each of the gas sensors depend on the weighted representations of each of the gas sensors.