POWER TRANSFER SYSTEM, POWER RECEIVING APPARATUS, CONTROL METHOD, AND STORAGE MEDIUM

• US 20160094052A1
• Filed: 04/24/2014
• Published: 03/31/2016
• Est. Priority Date: 05/16/2013
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Nago, Hidetada
• Granted Patent: US 10,256,672 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A first power receiving apparatus observes a power transfer signal from a power supply apparatus, and detects whether power transfer is being performed between the power supply apparatus and a second power receiving apparatus. When the power transfer is being performed between the power supply apparatus and the second power receiving apparatus, a waveform of the signal is deformed with a predetermined pattern. The second power receiving apparatus detects deterioration in power which is received from the power supply apparatus and detects whether the waveform of the signal changes with the predetermined pattern within a predetermined time after detecting the power deterioration. When detecting the change in the waveform of the signal with the predetermined pattern, the second power receiving apparatus determines that the first power receiving apparatus is in a power suppliable range of the power supply apparatus.

Claims

1. A power transfer system comprising a power supply apparatus, and a first power receiving apparatus and a second power receiving apparatus which receive power supply from said power supply apparatus,

said first power receiving apparatus comprising

first detection unit configured to observe a power transfer signal from said power supply apparatus, and detect whether power transfer is being performed between said power supply apparatus and said second power receiving apparatus, and

deformation unit configured to deform a waveform of the signal with a predetermined pattern when the power transfer is being performed between said power supply apparatus and said second power receiving apparatus, and

said second power receiving apparatus comprising

second detection unit configured to detect deterioration in power which is received from said power supply apparatus and detect whether the waveform of the signal changes with the predetermined pattern within a predetermined time after detecting the power deterioration, and

determination unit configured to determine that said first power receiving apparatus is in a power suppliable range of said power supply apparatus when detecting the change in the waveform of the signal with the predetermined pattern.

2. The system according to claim 1, wherein said determination unit determines that there is an abnormality when detecting no change in the waveform of the signal with the predetermined pattern, and

said second power receiving apparatus further comprises notification unit configured to notify said power supply apparatus of the abnormality when determining that there is the abnormality.

3. The system according to claim 2, wherein once the abnormality is notified from said second power receiving apparatus, said power supply apparatus stops power supply to said second power receiving apparatus.

4. The system according to claim 1, wherein said deformation unit deforms, by load modulation, the waveform of the signal with the predetermined pattern.

5. The system according to claim 4, wherein said first detection unit detects whether said second power receiving apparatus performs load modulation on the signal, and

said deformation unit deforms the waveform of the signal by performing load modulation in a period in which said second power receiving apparatus does not perform load modulation on the signal.

6. The system according to claim 1, wherein said power supply apparatus comprises authentication unit configured to perform authentication between said power supply apparatus and a power receiving apparatus when detecting the change in the waveform of the signal with the predetermined pattern.

7. The system according to claim 6, wherein said second power receiving apparatus does not respond to an authentication signal from said power supply apparatus when receiving the power supply from said power supply apparatus.

8. A power receiving apparatus for receiving power supply from a power supply apparatus, comprising:

detection unit configured to observe a power transfer signal from said power supply apparatus, and detect whether power transfer is being performed between said power supply apparatus and another power receiving apparatus; and

deformation unit configured to deform a waveform of the signal with a predetermined pattern when the power transfer is being performed between said power supply apparatus and said other power receiving apparatus.

9. A power receiving apparatus for receiving power supply from a power supply apparatus, comprising:

detection unit configured to detecting deterioration in power which is received from said power supply apparatus and detect whether a waveform of a power transfer signal from said power supply apparatus changes with a predetermined pattern within a predetermined time after detecting the power deterioration; and

determination unit configured to determine that another power receiving apparatus is in a power suppliable range of said power supply apparatus when detecting the change in the waveform of the signal with the predetermined pattern.

10. A method of controlling a power transfer system including a power supply apparatus, and a first power receiving apparatus and a second power receiving apparatus which receive power supply from the power supply apparatus, comprising:

in the first power receiving apparatus,

observing a power transfer signal from the power supply apparatus, and detecting whether power transfer is being performed between the power supply apparatus and the second power receiving apparatus, and

deforming a waveform of the signal with a predetermined pattern when the power transfer is being performed between the power supply apparatus and the second power receiving apparatus; and

in the second power receiving apparatus,

detecting deterioration in power which is received from the power supply apparatus and detecting whether the waveform of the signal changes with the predetermined pattern within a predetermined time after detecting the power deterioration, and

determining that the first power receiving apparatus is in a power suppliable range of the power supply apparatus when detecting the change in the waveform of the signal with the predetermined pattern.

11. A method of controlling a power receiving apparatus which receives power supply from a power supply apparatus, comprising:

observing a power transfer signal from the power supply apparatus, and detecting whether power transfer is being performed between the power supply apparatus and another power receiving apparatus; and

deforming a waveform of the signal with a predetermined pattern when the power transfer is being performed between the power supply apparatus and the other power receiving apparatus.

12. A method of controlling a power receiving apparatus which receives power supply from a power supply apparatus, comprising:

detecting deterioration in power which is received from the power supply apparatus and detecting whether a waveform of a power transfer signal from the power supply apparatus changes with a predetermined pattern within a predetermined time after detecting the power deterioration; and

determining that another power receiving apparatus is in a power suppliable range of the power supply apparatus when detecting the change in the waveform of the signal with the predetermined pattern.

13. A computer-readable storage medium storing a computer program for causing a computer included in a power receiving apparatus which receives power supply from a power supply apparatus to execute:

observing a power transfer signal from the power supply apparatus, and detecting whether power transfer is being performed between the power supply apparatus and another power receiving apparatus, and

deforming a waveform of the signal with a predetermined pattern when the power transfer is being performed between the power supply apparatus and the other power receiving apparatus.

14. A computer-readable storage medium storing a computer program for causing a computer included in a power receiving apparatus which receives power supply from a power supply apparatus to execute:

detecting deterioration in power which is received from the power supply apparatus and detecting whether a waveform of a power transfer signal from the power supply apparatus changes with a predetermined pattern within a predetermined time after detecting the power deterioration, and

determining that the other power receiving apparatus is in a power suppliable range of the power supply apparatus when detecting the change in the waveform of the signal with the predetermined pattern.