Metodo per il controllo della risposta temporale di un sensore per sostanze chimiche
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Abstract
The present invention relates to a method for the control or the response time
of a sensor (1) for chemical substances, said sensor (1) being comprised of a
first (2) and a second (3) pins, at least a layer of active material deposited
between said first (2) and said second (3) pins, said active material varying its
own impedance following the contact with said chemical substances and as a
function of their concentration, and a further control pin (4); said method being
characterized in that it provides at least a phase of detection of said chemical
substances corresponding to an absorption of said chemical substances by
said material, and at least a phase of recovery of said sensor, corresponding to
a desorption of said chemical substances by said material; and in that during
said phases of detection and recovery a signal is applied to said control pin
(4), suited to solicit the absorption or desorption of said material varying the
duration of the respective phases of detection and recovery