DETERIORATION DIAGNOSIS METHOD OF POWER APPARATUS, AND DETERIORATION DIAGNOSIS SYSTEM OF POWER APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a technology of diagnosing the deterioration of a power apparatus with a simple method.;SOLUTION: This diagnosis method is a deterioration diagnosis method of a power apparatus disposed in a housing, and includes: a process (a) of attaching an ultrasonic sensor 3 to one predetermined place in the housing; a process (b) of calculating a frequency spectrum of an electric signal based on an ultrasonic signal received by the ultrasonic sensor; and a process (c) of determining the deterioration of the power apparatus when a main peak value of the frequency spectrum is a predetermined threshold frequency or less.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT