Patent ID: 7640125

Claim:
A method for controlling the quality of an industrial process, of the type comprising the steps of: making available one or more reference signals relating to the industrial process; acquiring one or more real signals, indicative of the quality of said industrial process; comparing, using a processing unit, said one or more reference signal to said one or more real signals to identify defects in said industrial process, said comparing operation including: obtaining a real part and an imaginary part from said reference signal; and obtaining a real part and an imaginary part from said real signal; wherein said comparing operation further comprises the operations of: computing first comparison quantities by performing a comparison between values of said real part and of said imaginary part from said reference signal; computing second comparison quantities by performing a comparison between values of said real part and of said imaginary part from said real signal; and comparing said first comparison quantities and said second comparison quantities to obtain time location information associated to the presence of defects.