Object Detection and Tracking

Foreign objects near wireless power transfer (WPT) systems are fire hazards that must be detected. In this paper, a new accurate method is presented for foreign object detection based on an electromagnetic model for WPT. Foreign objects are detected by quantifying the deviation from a normal model. This deviation is caused by the foreign object's additional electromagnetic coupling. Advantages of this new method include invariance to receiver coil misalignment, and power level, allowing low-power detection prior to startup. Electromagnetic modelbased foreign object detection (EM-FOD) was demonstrated in hardware to detect a 2 cm diameter U.S. nickel coin, a small disposable lighter, and a saline proxy for a living animal in a kilowatt-level wireless power transfer system, using a pre-startup power of only 7 W. Furthermore, foreign objects can be detected regardless of an Rx coil misalignment of up to 10 cm. This paper is accompanied by an instructional video.

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Object Detection and Tracking

Cited by 4 publications

References 49 publications

An effective framework to recognise multiple objects using single shot detection algorithm over histogram of oriented gradients

An effective framework to recognise multiple objects using single shot detection algorithm over histogram of oriented gradients

A Small-Size Foreign Metal Objects Detection Based on Rectangular-Coil Array for DWPT Systems

Electromagnetic Model-Based Foreign Object Detection for Wireless Power Transfer

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