| CPC H02J 50/60 (2016.02) [G01R 19/10 (2013.01); G01V 3/10 (2013.01); H02J 50/10 (2016.02)] | 23 Claims |
|
1. A detection coil comprising:
a first sub coil disposed on at least one surface of a first printed circuit board (PCB) and comprising a first part and a second part, wherein the second part includes one end connected to one end of the first part and is wound in a direction opposite to a direction in which the first part is wound; and
a second sub coil disposed on at least one surface of a second PCB and comprising a third part and a fourth part, wherein the fourth part includes one end connected to one end of the third part, and is wound in a direction opposite to a direction in which the third part is wound,
wherein the first part and the second part are polygonal shapes symmetrical to each other when viewed from a first direction,
wherein the third part and the fourth part are polygonal shapes symmetrical to each other when viewed from the first direction,
wherein the second part is disposed under the first part when viewed from a second direction different from the first direction,
wherein the fourth part is disposed under the third part when viewed from the second direction, and
wherein the first sub coil and the second sub coil are arranged to partially overlap each other when viewed from the first direction.
|