Bank card presence detection to avoid a wireless charger demagnetizing a bank card

• US 9,608,470 B2
• Filed: 11/27/2013
• Issued: 03/28/2017
• Est. Priority Date: 11/27/2013
• Status: Expired due to Fees

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Huijser, Jan Paulus Freerk
• Primary Examiner(s): LEE, ERIC D
• Application Number:
  US14/091,585
• Publication Number:
  US 20150145471A1
• Time in Patent Office: 1,217 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 7/00032 characterised by data exchange
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

Various embodiments relate to a method, machine-readable medium, and a system for preventing demagnetization of a magnetically sensitive object comprising detecting, by a first identification sensor at a wireless charging transceiver, a foreign object; determining, by a processor using information from the first identification sensor, whether the foreign object is magnetically sensitive; and responsive to a determination that the foreign object is magnetically sensitive, preventing the wireless charging transceiver from operating.

Claims

1. A method for preventing demagnetization of a magnetically sensitive object, the method comprising the steps of:

detecting, by a first identification sensor at a wireless charging transceiver, a foreign object;

determining, by a processor using information from the first identification sensor, whether data on the foreign object is magnetically sensitive;

responsive to a determination by the processor that the data on the foreign object identifies the foreign object as being magnetically sensitive, preventing the wireless charging transceiver from operating; and

responsive to an inconclusive determination, taking an action which is assigned as the default action for an inconclusive determination.

2. The method of claim 1, further comprising the step of:

responsive to a determination that the foreign object is not magnetically sensitive, triggering the wireless charging transceiver to begin operating.

3. The method of claim 1, further comprising the steps of:

determining, by a processor using information from said first identification sensor, that the foreign object may be charged; and

responsive to a determination that the foreign object may be charged, triggering the wireless charging transceiver to begin operating.

4. The method of claim 1, wherein the first identification sensor is one of near field communication (NFC) sensor, a radio frequency identification (RFID) sensor, an ultrasound sensor, a Bluetooth transceiver, an optical sensor, and a tactile sensor.

5. The method of claim 1, wherein the wireless charging transceiver transfers power using an air-core transformer, resonant coupling, or strongly coupled resonators.

6. The method of claim 1, wherein determining, by a processor using information from the first identification sensor, whether the foreign object is magnetically sensitive comprises:

receiving, by the processor, a first information from the first identification sensor;

receiving, by the processor, a second information from a second identification sensor, wherein the second identification sensor is a different type of sensor than the first identification sensor; and

determining, by the processor, whether the foreign object is magnetically sensitive based on the first information and the second information.

7. The method of claim 1, wherein the information is received via an active communicative electronic circuit on the foreign object.

8. A non-transitory machine-readable medium capable of storing instructions, wherein said instructions, when executed by a processor, cause the processor to perform the steps comprising:

receiving a detection of a foreign object from a first identification sensor at a wireless charging transceiver;

determining, using information from the first identification sensor, whether data on the foreign object is magnetically sensitive;

responsive to a determination that the data on the foreign object identifies the foreign object as being magnetically sensitive, preventing the wireless charging transceiver from operating; and

responsive to an inconclusive determination, taking an action which is assigned as the default action for an inconclusive determination.

9. The non-transitory machine-readable medium of claim 8, said instructions further comprising the step of:

responsive to a determination that the foreign object is not magnetically sensitive, triggering the wireless charging transceiver to begin operating.

10. The non-transitory machine-readable medium of claim 8, said instructions further comprising the steps of:

determining, using information from said first identification sensor, that the foreign object may be charged; and

responsive to a determination that the foreign object may be charged, triggering the wireless charging transceiver to begin operating.

11. The non-transitory machine-readable medium of claim 8, wherein the first identification sensor is one of near field communication (NFC) sensor, a radio frequency identification (RFID) sensor, an ultrasound sensor, a Bluetooth transceiver, an optical sensor, and a tactile sensor.

12. The non-transitory machine-readable medium of claim 8, wherein the wireless charging transceiver transfers power using an air-core transformer, resonant coupling, or strongly coupled resonators.

13. The non-transitory machine-readable medium of claim 8, wherein determining, using information from the first identification sensor, whether the foreign object is magnetically sensitive comprises:

receiving a first information from the first identification sensor;

receiving a second information from a second identification sensor, wherein the second identification sensor is a different type of sensor than the first identification sensor; and

determining whether the foreign object is magnetically sensitive based on the first information and the second information.

14. A system comprising:

a first identification sensor;

a wireless charging transceiver; and

a processor configured to;

receive a detection of a foreign object from the first identification sensor at a wireless charging transceiver;

determine, using information from the first identification sensor, whether data on the foreign object is magnetically sensitive;

responsive to a determination that the data on the foreign object identifies the foreign object as being magnetically sensitive, prevent the wireless charging transceiver from operating; and

responsive to an inconclusive determination, taking an action which is assigned as the default action for an inconclusive determination.

15. The method of claim 14, the processor further configured to:

responsive to a determination that the foreign object is not magnetically sensitive, trigger the wireless charging transceiver to begin operating.

16. The method of claim 14, the processor further configured to:

determine, using information from said first identification sensor, that the foreign object may be charged; and

responsive to a determination that the foreign object may be charged, trigger the wireless charging transceiver to begin operating.

17. The method of claim 14, wherein the first identification sensor is one of near field communication (NFC) sensor, a radio frequency identification (RFID) sensor, an ultrasound sensor, a Bluetooth transceiver, an optical sensor, and a tactile sensor.

18. The method of claim 14, wherein the wireless charging transceiver transfers power using an air-core transformer, resonant coupling, or strongly coupled resonators.

19. The method of claim 14, wherein the system further comprises a second identification sensor;

and determining, using information from the first identification sensor, whether the foreign object is magnetically sensitive further comprises;

receiving a first information from the first identification sensor;

receiving a second information from the second identification sensor, wherein the second identification sensor is a different type of sensor than the first identification sensor; and

determining whether the foreign object is magnetically sensitive based on the first information and the second information.

20. The method of claim 14, wherein the information is received via an active communicative electronic circuit on the foreign object.