| 摘要 |
A technique capable of recognizing a usage state of a power of a user, curbing additionally needed power consumption is provided. Scanning bit stream data containing information regarding scan frequencies and an initial-stage power of each of the frequencies is outputted from an output part, decomposed into data of respective scan frequencies, transformed to time series digital data in an IFFT module, transformed to scanning analog data by D/A transform in an AFE, and transmitted to a power line. Reflected analog data received from the power line is transformed by A/D transform in the AFE, transformed to frequency series reflected spectrum data in the FFT module, and sent to a check part. The check part checks combination of attenuation rates of respective scan frequencies against registered pattern data registered in a pattern correspondence relationship storage part, and outputs a related connection state of an outlet as a checked result. |
