INDUCTIVE POWER TRANSFER FOR WIRELESS SENSOR SYSTEMS INSIDE A TYRE

• US 20120049620A1
• Filed: 05/05/2010
• Published: 03/01/2012
• Est. Priority Date: 05/11/2009
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Jansen, Gerardus Lucien Mathildus
• Granted Patent: US 9,199,516 B2
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60C 23/041 Means for supplying power to the signal- transmitting means on the wheel
• CPC Class Codes: B60C 23/0413 Wireless charging of active radio frequency circuits
• CPC Class Codes: B60C 23/0433 Radio signals
• CPC Class Codes: B60C 23/0452 Antenna structure, control or arrangement vehicle tyre mounted antennas H01Q1/2241
• CPC Class Codes: H02J 50/12 of the resonant type
• 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: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/73 for taking measurements, e.g. using sensing coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A system for inductive power transfer comprises: a send coil for transmitting power, a receive coil for receiving the power by induction, wherein the receive coil is moveable with respect to the send coil. The system further comprises a communication path from the receive coil to the send coil for only turning on the send coil in case that the receive coil is in close proximity. The invention also provides: a vehicle comprising the system as substantially described above, a tyre comprising a sensor for sensing a physical signal and a receive coil for receiving the power by induction and a method for wireless power transfer making use of the system as substantially described above

Claims

1. A system for inductive power transfer comprising:

a send coil for transmitting power,

a receive coil for receiving the power by induction,

wherein the receive coil is moveable with respect to the send coil, characterized in that

the system further comprises a communication path from the receive coil to the send coil for only turning on the send coil in case that the receive coil is in close proximity.

2. The system according to claim 1, wherein the communication path comprises a RF-link.

3. The system according to claim 1, wherein a trajectory of the receive coil movements forms a substantially circle-shape.

4. The system according to claim 1, wherein the send coil is adapted for mounting on a vehicle and the receive coil is adapted for mounting in a vehicle-tyre.

5. A vehicle comprising the system according to claim 1.

6. The vehicle according to claim 5, wherein the vehicle further comprises a sensor for sensing a physical signal associated with the vehicle wherein the sensor is provided with the receive coil.

7. The vehicle according to claim 6, wherein the vehicle comprises a tyre and the sensor is located in the tyre.

8. A tyre comprising a sensor for sensing a physical signal and a receive coil for receiving the power by induction.

9. A method for wireless power transfer making use of the system as substantially described above.