Wireless charging transmitter with foreign object and living object detection systems
AssigneeWiTricity Corporation
InventorsBernward Dimke, Milenko Stamenic
Life of this patent
Estimating the term…
Abstract
Techniques for detecting foreign objects in a charging path of a wireless power transfer system are disclosed. An example apparatus for detecting a presence of a foreign object includes a foreign object detection (FOD) system, a living object protection (LOP) system, a control circuit operably coupled to the FOD system and the LOP system and configured to detect a change in one or more power transfer parameters, perform a calibration procedure on the FOD system based on the change in the one or more power transfer parameters, operate the LOP system in a high sensitivity mode concurrently with the calibration procedure, and operate the LOP system in a standard detection mode upon completing the calibration procedure.
Claims30
An apparatus for detecting a presence of a foreign object within a region of a wireless power transfer system, the apparatus comprising:
- a foreign object detection (FOD) system;
- a living object protection (LOP) system;
- a control circuit operably coupled to the FOD system and the LOP system, and configured to:
- perform a calibration procedure on the FOD system;
- operate the LOP system in a high sensitivity mode concurrently with the calibration procedure;
- and
- operate the LOP system in a standard detection mode upon completing the calibration procedure.
A method of detecting a foreign object on a wireless charging base pad, comprising:
- initiating a wireless power transfer between a transmitter and a receiver, wherein the transmitter includes a foreign object detection (FOD) system and a living object protection (LOP) system;
- detecting a change in one or more power transfer parameters;
- performing a calibration procedure on the FOD system;
- operating the LOP system in a high sensitivity detection mode concurrently with the calibration procedure;
- and
- operating the FOD system and the LOP system in a standard detection mode upon completing the calibration procedure.
An apparatus for detecting a foreign object on a wireless charging base pad, comprising:
- means for initiating a wireless power transfer between a transmitter and a receiver, wherein the transmitter includes a foreign object detection (FOD) system and a living object protection (LOP) system;
- means for detecting a change in one or more power transfer parameters;
- means for performing a calibration procedure on the FOD system;
- means for operating the LOP system in a high sensitivity detection mode concurrently with the calibration procedure;
- and
- means for operating the FOD system and the LOP system in a standard detection mode upon completing the calibration procedure.
A non-transitory processor-readable storage medium comprising processor-readable instructions configured to cause one or more processors to detect a foreign object on a wireless charging base pad, comprising:
- code for initiating a wireless power transfer between a transmitter and a receiver, wherein the transmitter includes a foreign object detection (FOD) system and a living object protection (LOP) system;
- code for detecting a change in one or more power transfer parameters;
- code for performing a calibration procedure on the FOD system;
- code for operating the LOP system in a high sensitivity detection mode concurrently with the calibration procedure;
- and
- code for operating the FOD system and the LOP system in a standard detection mode upon completing the calibration procedure.
Dependencies are inferred from the claim text.