Rogue object detection algorithm for wireless charging notification
AssigneeIntel Corporation
InventorsLei Shao, Xintian E. Lin
Life of this patent
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Abstract
The disclosure generally relates to methods, system and apparatus to detect a rogue object placed on an A4WP charging pad (interchangeably, charging mat). In one embodiment, presence of a rogue object on a charging pad is detected by measuring currents and voltages from sensor circuits on PTU and apply machine learning algorithms to develop power leakage algorithm. The algorithm identifies false objects placed on the charging pad and obviates false alarm while simultaneously detecting presence of a rogue object which can damage the A4WP wireless charging system.
Claims24
A device to detect presence of a rogue object at or near a wireless charging pad of a Power Transmission Unit (PTU) configured to charge a Power Receiving Unit (PRU), the device comprising:
- a first processor to identify a PTU operating mode as one of power save (PS) mode, power transfer (PT) mode or power save charge-complete (PS-CC) mode, the first processor to receive one or more PTU charging parameters;
- a second processor to receive one or more received PRU power characteristics including one or more of voltage, current or power received at a PRU rectifier;
- and
- a third processor to determine a PTU power loss value as a function of one or more of the PRU received power characteristics, one or more of the PTU charging parameters and the PTU operating mode, the third processor further configured to detect presence of the rogue object if the calculated power loss exceeds a predefined threshold.
A method to detect presence of a rogue object at or near a wireless charging pad of a Power Transmission Unit (PTU) configured to charge a Power Receiving Unit (PRU), the method comprising:
- (a) identifying a PTU operating mode as one of power save (PS) mode, power transfer (PT) mode or power save charge-complete (PS-CC) mode;
- (b) receiving one or more PRU received power characteristics including one or more of voltage, current or power received at a PRU rectifier;
- (c) receiving one or more PTU charging parameters;
- (d) determining a PTU power loss value as a function of one or more of the PRU received power characteristics, one or more of the PTU charging parameters and the PTU operating mode;
- and
- (e) detecting presence of the rogue object if the calculated power loss exceeds a predefined threshold.
A non-transitory computer readable medium comprising instructions when executed to cause one or more processor to perform a process comprising:
- (a) identify a PTU operating mode as one of power save (PS) mode, power transfer (PT) mode or power save charge-complete (PS-CC) mode;
- (b) receive one or more PRU received power characteristics including one or more of voltage, current or power received at a PRU rectifier;
- (c) receive one or more PTU charging parameters;
- (d) determine a PTU power loss value as a function of one or more of the PRU received power characteristics, one or more of the PTU charging parameters and the PTU operating mode;
- and
- (e) detect presence of the rogue object if the calculated power loss exceeds a predefined threshold.
A system to detect presence of a rogue object at or near a wireless charging pad of a Power Transmission Unit (PTU) configured to charge a Power Receiving Unit (PRU), comprising:
- a PTU having a power amplifier, a resonator, a communication platform, a power supply and a controller circuitry, the communication platform configured to communicate with the PRU;
- wherein the controller circuitry includes a memory circuitry configured to communicate with one or more of:
- a first processor to identify a PTU operating mode as one of power save (PS) mode, power transfer (PT) mode or power save charge-complete (PS-CC) mode, the first processor to receive one or more PTU charging parameters;
- a second processor to receive one or more received PRU power characteristics including one or more of voltage, current or power received at a PRU rectifier;
- and
- a third processor to determine a PTU power loss value as a function of one or more of the PRU received power characteristics, one or more of the PTU charging parameters and the PTU operating mode, the third processor further configured to detect presence of the rogue object if the calculated power loss exceeds a predefined threshold.
Dependencies are inferred from the claim text.