| 摘要 |
<p>A power device according to an embodiment of the present invention comprises: a sensing part to sense ultrasonic wave or vibration; a calculating part to generate a first trigger signal related to failure occurrence and a second trigger signal for the discriminating power device based on the magnitude of ultrasonic wave or vibration; a signal generating part outputting a failure occurrence signal or a discrimination signal unique to power device based on the first and the second trigger signals; an amplifying part to amplify the failure occurrence signals or discrimination signal; and a carrier part to output a first signal by adding the failure occurrence signal or discrimination signal to a carrier signal through a power-line.</p> |
