Aging deterioration diagnosis apparatus and aging deterioration diagnosis method

摘要

This aging degradation diagnosis apparatus is provided with: a degradation pattern generation unit (3) which generates a degradation pattern that indicates distributions of signal intensities of measured signals and phases of alternate-current voltage; a histogram calculation unit (4) which calculates a gradient vector of the signal density at each distribution point in the degradation pattern, and which calculates, from the calculated gradient vectors, a histogram in the gradient direction of the signal densities for each of mutually different phase ranges; a feature vector generation unit (5) which generates a feature vector in which bin values of the histograms in the respective phase ranges are lined up; and a degradation cause identification unit (9) which, from among feature vectors for respective degradation causes, searches for a feature vector similar to the feature vector generated by the feature vector generation unit (5), and outputs a degradation cause related to said similar feature vector.