Communication system and communication device

Patent metadata

Field	Value
Publication number	US-9735832-B2
Application number	US-201214232218-A
Country	US
Kind code	B2
Filing date	Jul 13, 2012
Priority date	Jul 13, 2011
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

An output circuit sends a control pilot signal generated in a voltage generator to an input circuit. A communication unit is connected between an earthed wire and a control pilot wire on the output side of the output circuit via a bandpass filter. A communication unit is connected between the earthed wire and the control pilot wire on the input side of the input circuit via a bandpass filter. A low-pass filter is interposed between the output circuit and the communication unit. A low-pass filter is interposed between the input circuit and the communication unit.

First claim

What is claimed is:

1. A communication system including an output circuit provided in a power feeding device for feeding power to a vehicle and outputting a rectangular wave signal of a predetermined frequency, and an input circuit provided in the vehicle and connected with the output circuit through a plurality of signal lines, the rectangular wave signal output by the output circuit being input to the input circuit, the communication system performing communication between the vehicle and the power feeding device by superimposing a communication signal onto the signal lines, comprising:
a first series circuit in the power feeding device, connected between the signal lines, and comprising: a first communication unit, configured to perform transmission and reception of a communication signal, and a first bandpass filter;
a second series circuit in the vehicle, connected between the signal lines, and comprising: a second communication unit, configured to perform transmission and reception of a communication signal, and a second bandpass filter;
a first low pass filter interposed between the output circuit and the first communication unit; and
a second low pass filter interposed between the input circuit and the second communication unit, wherein
one end of the first communication unit of the first series circuit is directly and only connected to one end of the first bandpass filter, and
one end of the second communication unit of the second series circuit is directly and only connected to one end of the second bandpass filter.

2. The communication system according to claim 1 , wherein
each of the first and second low pass filters includes an inductor connected in series with the signal line.

3. The communication system according to claim 2 , wherein
each of the first and second low pass filters includes a resistance connected in parallel with the inductor.

4. The communication system according to claim 2 , wherein
each of the first and second low pass filters includes a resistance connected in series with the inductor.

5. The communication system according to claim 2 , wherein
each of the first and second low pass filters includes a serial circuit of a capacitor and a resistance between signal lines on one end of the inductor.

6. The communication system according to 1 , wherein
the output circuit is configured to output a rectangular wave signal of 1 kHz, and
rise time and fall time of the rectangular wave signal on an input side of the input circuit correspond to 10 μs or shorter.

7. The communication system according to claim 2 , wherein
the output circuit is configured to output a rectangular wave signal of 1 kHz, and
rise time and fall time of the rectangular wave signal on an input side of the input circuit correspond to 10 μs or shorter.

8. The communication system according to claim 3 , wherein
the output circuit is configured to output a rectangular wave signal of 1 kHz, and
rise time and fall time of the rectangular wave signal on an input side of the input circuit correspond to 10 μs or shorter.

9. The communication system according to claim 4 , wherein
the output circuit is configured to output a rectangular wave signal of 1 kHz, and
rise time and fall time of the rectangular wave signal on an input side of the input circuit correspond to 10 μs or shorter.

10. The communication system according to claim 5 , wherein
the output circuit is configured to output a rectangular wave signal of 1 kHz, and
rise time and fall time of the rectangular wave signal on an input side of the input circuit correspond to 10 μs or shorter.

11. A communication device including an output circuit outputting a rectangular wave signal of a predetermined frequency through a plurality of signal lines, comprising:
a series circuit connected between the signal lines and comprising: a communication unit, configured to perform transmission and reception of a communication signal by superimposing a communication signal onto the signal lines, and a bandpass filter; and
a low pass filter interposed between the output circuit and the communication unit, wherein
one end of the communication unit of the series circuit is directly and only connected to one end of the bandpass filter.

12. The communication device according to claim 11 further comprising:
a generation unit generating the rectangular wave signal;
a voltage detection unit detecting an output voltage of the output circuit; and
an adjustment unit adjusting a rectangular wave signal generated by the generation unit in accordance with the voltage detected by the voltage detection unit.

13. A communication device, including an input circuit to which a rectangular wave signal of a predetermined frequency is input through a plurality of signal lines, comprising:
a series circuit connected between the signal lines and comprising: a communication unit, configured to perform transmission and reception of a communication signal by superimposing a communication signal onto the signal lines, and a bandpass filter; and
a low pass filter interposed between the input circuit and the communication unit, wherein
one end of the communication unit of the series circuit is directly and only connected to one end of the bandpass filter.

14. The communication device according to claim 13 , further comprising:
a resistance unit having a plurality of resistances and capable of adjusting a resistance value; and
an adjustment unit adjusting a resistance value of the resistance unit so as to change a voltage of the resistance unit.

Assignees

• Hagihara Takeshi
• Komatsu Yutaka
• Izumi Tatsuya
• Nii Kazuhiko
• Okada Ryou
• Takata Yousuke
• Andoh Hiroya
• Ochiai Yuta
• Kamaga Ryuichi
• Iwai Atsushi
• Miyashita Yukihiro
• Nakagawa Nobuyuki
• Sumitomo Electric Industries
• Sumitomo Wiring Systems
• Autonetworks Technologies Ltd
• Toyota Motor Co Ltd

Inventors

• Hagihara Takeshi
• Komatsu Yutaka
• Izumi Tatsuya
• Nii Kazuhiko
• Okada Ryou
• Takata Yousuke
• Andoh Hiroya
• Ochiai Yuta
• Kamaga Ryuichi
• Iwai Atsushi
• Miyashita Yukihiro
• Nakagawa Nobuyuki

Classifications

• Y02T90/16

  Information or communication technologies improving the operation of electric vehicles · CPC title

• B60L2270/147

  electro magnetic [EMI] · CPC title

• H04B2203/547

  via DC power distribution · CPC title

• B60L11/1846

  Operations & Transport · mapped topic

• B60R16/0231

  Circuits relating to the driving or the functioning of the vehicle (monitoring tyres B60C23/00; indicating overspeed B60K31/00; for dash boards B60K37/00, B60Q3/10; for indicating emergencies B60Q1/52; brake control systems B60T; registering or indicating the working of vehicles G07C5/00; measuring distance G01C, e.g. combinations of speed and distance G01C23/00; engine indicators G01L; measuring speed or acceleration G01P) · CPC title