Power line communication device

Patent metadata

Field	Value
Publication number	US-2020212958-A1
Application number	US-201916719452-A
Country	US
Kind code	A1
Filing date	Dec 18, 2019
Priority date	Dec 28, 2018
Publication date	Jul 2, 2020
Grant date	—

Abstract

The power line communication device detects inverter noise from the voltage waveforms of the power line, and executes the output of the transmission signal in a period in which it is determined that the signal amplitude of the transmission signal in the transmission processing unit exceeds a predetermined value from the output amplitude of the inverter noise, and stops the output of the transmission signal in other periods.

First claim

What is claimed is:

1 . A power line communication device comprising:
a transmission processing unit for generating a transmission signal to be output to a power line; a transmission position determination unit for determining a transmission period of the transmission signal; and an output unit for outputting the transmission signal in the transmission period, wherein the transmission position determination unit determines the transmission period based on an amplitude of the transmission signal and a noise voltage amplitude of the power line.

2 . The power line communication device according to claim 1 ,
wherein the transmission period is a period in which the amplitude of the transmission signals exceeds a predetermined value from the noise voltage amplitude.

3 . The power line communication device according to claim 2 , further comprising:
an inverter noise detection processing unit for detecting inverter noise by the DC/AC inverter, wherein the noise voltage amplitude is a voltage amplitude of the inverter noise.

4 . The power line communication device according to claim 1 , further comprising:
a reception processing unit for obtaining reception data from reception signals from the power line.

5 . The power line communication device according to claim 4 , further comprising:
a reception position determination unit for determining a reception period of the reception signal; and an input unit for inputting the reception signal in the reception period, wherein the reception position determination unit determines the reception period based on a signal amplitude of the reception signal and a noise voltage amplitude of the power line.

6 . A power line communication device comprising:
an inverter noise detection processing unit for detecting inverter noise by a DC/AC inverter; a half-wavelength shift processing unit for generating a half-wavelength shift signal in which a phase corresponding to a half-wavelength of the inverter noise is shifted with respect to a received signal from a power line; an addition unit for generating an addition signal in which the received signal and the half-wavelength shift signal are added; and a reception processing unit for acquiring received data based on the addition signal.

7 . The power line communication device according to claim 6 , further comprising:
a noise waveform storage device for retaining a waveform substantially containing a large amount of inverter noise, wherein the half-wavelength shift processing unit generates the half-wavelength shift signal by shifting a phase corresponding to a half-wavelength of the inverter noise with respect to a waveform substantially containing a large amount of inverter noise, wherein the half-wavelength shift processing unit removes frequency components of the received signal from the inverter noise.

8 . The power line communication device according to claim 6 , further comprising:
a transmission processing unit for generating a transmission signal to be output to the power line; a transmission position determination unit for determining a transmission period of the transmission signal; and an output unit for outputting the transmission signal in the transmission period, wherein the transmission position determination unit has a first period corresponding to a half-wavelength of the inverter noise as a transmission period.

9 . The power line communication device according to claim 8 ,
wherein the same transmit signals as the first period are outputted in a second period corresponding to a half-wavelength of the inverter noise, which is consecutive to the first period.

10 . The power line communication device according to claim 9 , further comprising:
a reception position determination unit for determining a reception period of the reception signal; an input unit for inputting the reception signal in the reception period; and a reception processing unit for acquiring reception data based on an input signal from the input unit; wherein the reception position determination unit has a period corresponding to the second period as the reception period.

11 . A power line communication device comprising:
an inverter noise detection processing unit for detecting inverter noise by a DC/AC inverter of a power line; a half-wavelength shift processing unit for generating a half-wavelength shift signal in which a phase corresponding to a half-wavelength of the inverter noise is shifted with respect to the inverter noise; a transmission processing unit for generating a transmission signal from transmission data; a transmission position determination unit for determining a transmission period of the transmission signal; an output unit for outputting the transmission signal in the transmission period; and an addition unit for generating an addition signal obtained by adding the transmission signal and the half-wavelength shift signal, and outputting the addition signal to the power line.

12 . The power line communication device according to claim 11 ,
wherein the transmission position determination unit sets a first period corresponding to a half-wavelength of the inverter noise as a transmission period.

13 . The power line communication device according to claim 12 , further comprising:
a reception position determination unit for determining a reception period of a reception signal; and an input unit for inputting the reception signal in the reception period, wherein the reception position determination unit defines a period corresponding to the first period or a second period corresponding to a half-wavelength of the inverter noise as the reception period.

Assignees

• Renesas Electronics Corp

Inventors

• Shibuya Kosuke
• Shibuya Yoshitaka

Classifications

• H04B3/46

  Monitoring; Testing · CPC title

• H04B3/546 Primary

  Combination of signalling, telemetering, protection (circuits for remote indication of supply or distribution network condition H02J13/00) · CPC title

• H04B3/54 Primary

  Systems for transmission via power distribution lines · CPC title

• H04B3/544

  Setting up communications; Call and signalling arrangements · CPC title

• H04B3/06 Primary

  by the transmitted signal · CPC title