US 12,235,240 B2
Magnetic body inspection apparatus and magnetic body inspection method
Daichi Chiba, Osaka (JP)
Assigned to OSAKA UNIVERSITY, Osaka (JP)
Appl. No. 18/009,113
Filed by OSAKA UNIVERSITY, Osaka (JP)
PCT Filed May 25, 2021, PCT No. PCT/JP2021/019773
§ 371(c)(1), (2) Date Dec. 8, 2022,
PCT Pub. No. WO2021/251129, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 2020-100072 (JP), filed on Jun. 9, 2020.
Prior Publication US 2023/0213480 A1, Jul. 6, 2023
Int. Cl. G01N 27/82 (2006.01); G01R 33/00 (2006.01); G01R 33/07 (2006.01)
CPC G01N 27/82 (2013.01) [G01R 33/0023 (2013.01); G01R 33/072 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A magnetic body inspection apparatus comprising:
a magnet;
a first magnetic sensor disposed at a first predetermined position relative to the magnet and configured to output a first electric signal; and
a second magnetic sensor disposed at a second predetermined position that is different from the first predetermined position relative to the magnet and configured to output a second electric signal;
wherein the magnetic body inspection apparatus is configured to output a difference between the first electric signal outputted from the first magnetic sensor and the second electric signal outputted from the second magnetic sensor, and
the first and second magnetic sensors are disposed at points symmetrically positioned with respect to a gravity center of the magnet.