| 摘要 |
<p>The method involves measuring, during a determined duration, signals (5) representing motion of teeth (6) of a phonic wheel (3) integrated with a rotor (2). The carried out measurement is sampled, digitized and stored for obtaining an initial digital vector. A detection signal about a known disturbance frequency is extracted from the initial vector. The detection signal is compared with a predetermined threshold and an alert message is delivered when the detection signal exceeds the threshold. An independent claim is also included for a system for detecting speed variation of a rotor.</p> |
