| 摘要 |
PROBLEM TO BE SOLVED: To provide a means capable of accurately detecting the occurrence of tracking phenomena and similar abnormal currents from a point of view different from conventional techniques. SOLUTION: A first parameter acquired by converting an aspect of distortion of a current waveform into a numerical value is computed for every first section to determine the difference with a first parameter of a previous first section as the variation of the first parameter. A ratio between an average amount of variation in an n-number of first parameters and an average amount of the n-number of the first parameters is computed as a second parameter for every second section, n-times of the first section, to determine the occurrence of tracking on the basis of a value of the second parameter. COPYRIGHT: (C)2009,JPO&INPIT
|
