Indoor line terminal state determination apparatus, plc adaptor, and method for determining indoor line terminal state

A PLC adaptor comprising:

• an indoor line terminal state determination apparatus;
• an encoder configured to decompose digital data containing information regarding frequencies and information regarding a power of each of the frequencies into signals of the respective frequencies;
• an inverse Fourier transform module configured to superimpose the digital data of the respective frequencies generated by the encoder and transform the superimposed digital data to time series digital data;
• an analog front end configured to transform the time series digital data to transformed analog data by D/A transform, transmit the transformed analog data to a indoor power line, and transform the analog data received from the indoor power line to transformed digital data by A/D transform;
• and
• a Fourier transform module configured to transform the transformed time series digital data outputted from the analog front end to frequency series digital data, wherein
• the indoor line terminal state determination apparatus automatically determines whether an outlet set to connect the indoor power line to an electric device is in an open state or in a state connected to the device, and comprises:
• a scanning bit stream data output part configured to output scanning bit stream data containing information regarding a plurality of scan frequencies and information regarding an initial-stage power of each of the scan frequencies;
• a pattern correspondence relationship storage part configured to store registered pattern data provided in such a manner that information regarding an attenuation rate of each of the scan frequencies or information capable of calculating the attenuation rate is related to a connection state of each outlet set on the indoor power line;
• and
• a check part configured to recognize a power of each of the scan frequencies from inputted frequency series reflected spectrum data, calculate the attenuation rate of each of the scanning frequencies from the initial-stage power, retrieve the registered pattern data having the same attenuation rate of each of the scanning frequencies or almost the same attenuation rate thereof within an error range, from the pattern correspondence relationship storage part, and output the connection state of the outlet related to the retrieved registered pattern data, as a check result when the retrieving can be successfully performed, and
• when the scanning bit stream data output part outputs the scanning bit stream data, the encoder decomposes the scanning bit stream data into the signals of the respective frequencies, the inverse Fourier transform module transforms the signals of the respective frequencies to the time series digital data, and the analog front end transforms the time series digital data to the scanning analog data and transmits the scanning analog data to the indoor power line, and after that,
• when the analog front end receives the reflected analog data from the indoor power line and transforms the reflected analog data to digital data, the Fourier transform module transforms the digital data to the reflected spectrum data serving as the frequency series digital data and applies the reflected spectrum data to the check part, and the check part performs a checking process.