METHOD AND DEVICE FOR DETECTING DETERIORATION OF INSULATED-WIRE COVERING

PURPOSE:To provide a method and a device for detecting the deterioration of an insulated-wire covering in which non-destructive measurements of an insulated wire are made to quantitatively determine the degree of deterioration of the insulating covering with ease. CONSTITUTION:A device for detecting the deterioration of an insulated-wire covering comprises an input device 4 for measuring the surface condition of an insulating covering while scanning a pair of a light-emitting element 5 and a photocell 6 in the longitudinal direction of the insulated wire, an A/D coverter 7 for converting received analog signals into signals in series, a waveform memory device 8 for string the signals as lines of waveform data, an arithmetic unit 9 for creating a distribution of frequencies of occurrence from the lines of waveform data, for calculating from the distribution of frequencies of occurrence the level of a threshold for detecting cracks, and for determining the degree of deterioration of the insulating covering from the number of cracks, and an output device 11 for outputting and displaying.