Patent ID: 9651529
Date: 2017-05-16
CPC Classifications: G01N

Claim:
1. A method for detecting a gas or a vapour, which comprises using an artificial olfactory system ( 100 ), comprising: an inlet ( 101 ); a gas chamber ( 110 ) having a detector means, connected to a data acquisition system ( 104 ); a heater ( 112 ) and a plurality of fans ( 115 ) for controlling the temperature in the gas chamber ( 110 ); a humidity absorber ( 111 ); an outlet ( 102 ); a vacuum pump ( 103 ) for eliminating remaining polluting gas or vapours; wherein the detector means comprises a plurality of clusters ( 120 ) and each cluster comprises a plurality of identical sensors ( 121 ) capable of responding to a particular gas or vapour, said method comprising the steps of: exposing the gas or vapour to the plurality of sensors ( transferring the plurality of output signals to the data acquisition system ( extracting median data from the plurality of output signals from each of the plurality of clusters ( applying a principal component analysis (PCA) on the median data from all of the plurality of clusters ( applying a neural network on the median data from all of the plurality of clusters ( applying a least square regression analysis on the median data from all of the plurality of clusters (