Foreign matter detection method and system, storage medium and program product

Abstract

The embodiment of the invention provides a foreign matter detection method and system, a storage medium and a program product, and relates to the technical field of wireless charging. The method comprises the following steps: setting at least three sampling points for each detection coil in a detection coil matrix covering a working range of a transmitting coil and a receiving coil of the wireless charging system, and acquiring voltage state data of each resonant circuit at a first sampling point, a second sampling point and a sampling resistor; the voltage state data represents the change relation of the voltage at the corresponding sampling point along with time; according to the voltage state data, performance parameters of the detection coils are determined, and the performance parameters represent the control capability of the detection coils on the current on the resonance loop where the detection coils are located; and obtaining foreign matter detection data according to the voltage state data and the performance parameters. According to the method, foreign matter detection can be judged from more dimensions, then multi-feature recognition is achieved, the accuracy of tiny metal foreign matter detection can be improved, and then the stability and safety of operation of a wireless electric energy transmission system are improved.

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