Smart wireless charger
A wireless charging system is disclosed. The wireless charging system includes a coil to create electromagnetic field and a sniffer system to detect a presence of a low frequency (LF) signal. The sniffer system is configured to deactivate the coil for a predetermined duration and perform an operation to detect the presence of the LF signal.
1. A wireless charging system, comprising:
an induction coil configured to create an electromagnetic field; and
a sniffer system configured to detect communication by a low frequency (LF) signal at preselected intervals between a base station and a wireless key, deactivate the induction coil prior to performing the detection of communication by the LF signal, and continue to keep the induction coil deactivated for a predetermined duration after the sniffer system detected the communication by the LF signal between the base station and the key.
2. The wireless charging system of claim 1 , wherein the sniffer system includes a LF sensing coil and a signal detector.
3. The wireless charging system of claim 1 , wherein the LF signal is transmitted by a keyless entry system.
4. The wireless charging system of claim 1 , wherein the induction coil is configured to transmit electromagnetic energy to charge a battery of an external device.
5. A method, comprising:
(a) deactivating an induction coil in a wireless charging system;
(b) activating a low frequency (LF) detection system incorporated in the wireless charging system; and
(c) detecting, in the wireless charging system, communication by a LF signal between the base station and a wireless key, wherein, if the LF signal is detected, continuing to keep the induction coil deactivated for a predetermined duration and, if the LF signal is not detected, reactivating the induction coil.
6. The method of claim 5 , further comprising:
repeating steps (a) to (c) at regular predetermined intervals.