| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic discrimination method of a normal sound and an abnormal sound by analyzing a rubbing sound. SOLUTION: A threshold is set, based on a sound pressure level of a normal vacuum capacitor, a motor driver 2 is activated, and a rubbing sound is recorded by a microphone 4, rotating an adjustment axis of a vacuum capacitor 1d. The recorded rubbing sound is input to a personal computer 3, compared with the pre-determined threshold, and a sound over the threshold is judged as abnormal. |
