This article proposes a new detection method for foreign metal objects (FMOs) based on a new detection array. Compared with traditional FMO detection (FMOD), the proposed method can detect smaller FMOs without any external sensors. The nature of the method is to decouple the receiving (Rx) coil that has similar feedback characteristics to small-size FMOs. Hence, the cost of FMOD system is reduced in the actual implementation. Furthermore, this kind of FMOD does not require communication. So, it has high stability and can be easily realized. Finally, the experimental results prove that the proposed method has a high effectiveness for detecting small-size FMOs (able to detect FMOs up to 1.08 cm2).

中文翻译：

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基于矩形线圈阵列的DWPT系统小尺寸金属异物检测

本文提出了一种基于新型检测阵列的异物金属物体（FMO）检测方法。与传统的FMO检测（FMOD）相比，该方法无需任何外部传感器即可检测更小的FMO。该方法的本质是对接收 (Rx) 线圈进行去耦，该线圈具有与小尺寸 FMO 类似的反馈特性。因此，FMOD系统的成本在实际实施中降低了。此外，这种FMOD不需要通信。因此，它具有较高的稳定性并且易于实现。最后，实验结果证明，该方法对于检测小尺寸FMO（能够检测到1.08 cm2以下的FMO）具有较高的有效性。