An optimal automated signal superimposing method for Remote Field Eddy Current Transformer Coupling signals

Remote Field Eddy Current Transformer Coupling (RFECTC) is a nondestructive testing method. Some forms of RFECTC require several channels to be viewed simultaneously, this is achieved by superimposing the channels. Superimposing is difficult because every channel has a different amplitude scale. This paper develops a method to superimpose the channels by formulation a new cost function and then minimizing. The method can be used with any application that requires multiple channels to be viewed simultaneously. The method was tested with RFECTC signals and it was concluded that the method outperforms the current method visually and quantitatively superior.