US 11,833,916 B2
Foreign substance detection device, electricity transmission device, electricity reception device, and electric power transmission system
Akira Gotani, Tokyo (JP); and Kazuki Kondo, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Appl. No. 17/628,700
Filed by TDK CORPORATION, Tokyo (JP)
PCT Filed Dec. 4, 2020, PCT No. PCT/JP2020/045218
§ 371(c)(1), (2) Date Jan. 20, 2022,
PCT Pub. No. WO2021/131608, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-239626 (JP), filed on Dec. 27, 2019.
Prior Publication US 2022/0266703 A1, Aug. 25, 2022
Int. Cl. B60L 53/124 (2019.01); H02J 50/12 (2016.01); H02J 50/60 (2016.01); H02J 7/02 (2016.01)
CPC B60L 53/124 (2019.02) [H02J 7/02 (2013.01); H02J 50/12 (2016.02); H02J 50/60 (2016.02)] 15 Claims
OG exemplary drawing
 
1. A foreign object detection device, comprising:
a detection coil unit including a substrate and a plurality of coils mounted on a first surface of the substrate, each of the coils having a first conductive pattern turned around a first axis orthogonal to the first surface; and
a detector connected to the coils to detect existence of a foreign object on basis of a vibration signal output when each of the coils is excited, wherein
the coils each define an opening, and
the substrate has a through hole and a component space within each of the openings of the coils as seen in a direction of the first axis, the through hole extending through the substrate, the component space accommodating a component or a wire.