| 摘要 |
A method for monitoring the quality of an industrial working process, which includes identifying defects of the working process, of the type comprising the steps of:
acquiring (100) at least one signal ( x(t) ) having multiple frequency components from the industrial working process (10), According to the invention, the method further comprises the operations of:
decomposing (200) said at least one signal having multiple frequency components ( x(t) ) in signals having single frequency components ( IMF 1 ...IMF n-1 , OIMF 1 ...OIMF n-1 ),
calculating (300) the information content ( var 1 ...var n-1 ) for each signal having a single frequency component ( IMF 1 ...IMF n-1 , OIMF 1 ...OIMF n-1 ),
analyzing (400) the information content ( var 1 ...var n-1 ) for each signal having a single frequency component ( IMF 1 ...IMF n-1 , OIMF 1 ...OIMF n-1 ), and
if the value of the information content ( var n-1 ) of the signal at the lowest single frequency component (IMF n-1 , OIMF n-1 ) does not represent a main percentage of the information content of the whole acquired signal ( x(t) ), said acquired signal having multiple frequency components ( x(t) ) is evaluated as indicative of a working process with defects and a defect analysis step (500) is performed on said signal having multiple frequency components ( x(t) ). |
