Patent ID: 8823389
Filing Date: 2014-09-02
Classification: G01R

Abstract:
1. A method for identifying EMI sources in an electrical system having a plurality of electrical components connected together by a plurality of cables, each set of two electrical components connected by one of said plurality of cables forming a potential EMI source, said method comprising the steps of: a) positioning a plurality of antennas at spaced positions around the vehicle, b) measuring EMI from each of said antennas over a plurality of frequencies, c) identifying one or more frequencies with measured EMI greater than a predetermined threshold, d) creating a measurement profile of received EMI versus said antennas for each of said identified frequencies, e) simulating EMI reception by said antennas at one of said identified frequencies for each potential EMI source and creating a simulation profile of received EMI versus said antennas for each potential EMI source, f) identifying an actual source of EMI from said potential EMI sources by comparing said measurement profile with said simulation profile for each potential EMI source wherein a match of the shape of said measurement profile with the shape of one simulation profile for one potential EMI source identifies said one potential EMI source as the actual source of EMI, repeating steps d) through f) for each identified frequency.