Control method for chemical gas sensors and gas detection system (Machine-translation by Google Translate, not legally binding)

摘要

Control method for chemical gas sensors of the type having a sensitive layer, comprising the steps of: a) measuring the resistivity of the sensitive layer in an instant, with the sensitive layer being at a temperature; b) depending on the measured resistivity value, establish a temperature profile to apply to the sensitive layer; c) obtaining the average of the temperature values along the temperature profiles applied to the sensitive layer during a time interval, and comparing said average temperature with stored values to determine changes in the gas concentration; a gas detection system comprising a chemical gas sensor linked to a control means linked to a heating means associated with the sensitive layer is also object, defining a sigma-delta topology control loop. (Machine-translation by Google Translate, not legally binding)