APPARATUS AND METHOD FOR LOCATING INFERIOR PARTS IN POWER DISTRIBUTION LINE EQUIPMENT BASED ON VARIATION OF RADIO FREQUENCY NOISE SIGNAL

摘要

An apparatus for locating inferior parts in distribution line equipment may include a wireless noise receiver for continually receiving multiple noise-free frequencies and converting the received multiple noise-free frequencies into an audio frequency signal, a signal processor for quantifying a power frequency and harmonic frequencies of the audio frequency signal, a signal analyzer for calculating variation of the power frequency and the harmonic frequencies, determining the number of changed frequencies based on the calculated variation, detecting a radio frequency noise signal generated from an inferior part based on the calculated variation and the number of changed frequencies, and a frequency calibrator for determining a noise-free band, selecting the multiple noise-free frequencies from the noise-free band, and managing a list of the selected multiple noise-free frequencies.