Patent ID: 8000903
Filing Date: 2011-08-16
Classification: G01N,Y10S

Abstract:
1. A method of sensing presence or absence of a specified gas molecule in a target gas, the method comprising: providing, in a chamber, a target gas that may contain up to H candidate gas molecules present with unknown concentrations c providing, within the chamber, an environment having a sequence of values EP measuring, between the first and second interdigitated electrodes, in a presence of the target gas, an electrical parameter value (“response value”), denoted V(EP providing reference response values V({EP approximating the sequence of electrical parameter values V({EP of the concentration values c h of the candidate gas molecules, where a 0 , . . . , a H are known response coefficients that may depend upon one or more values EP p of at least one of the environmental parameters that the candidate gas molecules experience, and a 0 represents a response coefficient when none of the candidate gas molecules is present; estimating an error value ε({c where w p is a non-negative weight value that may vary with estimated relative importance of the environmental parameter values EP p and q is a positive number; determining or providing concentration values c comparing the minimum error value ε({c when ε({c when ε(c