US 11,699,052 B2
Bearing component, bearing, machine, vehicle, individual identification method for bearing component, manufacturing method for bearing, manufacturing method for machine, and manufacturing method for vehicle
Satoru Suzuki, Fujisawa (JP); and Asahi Saito, Fujisawa (JP)
Assigned to NSK LTD., Tokyo (JP)
Appl. No. 17/424,355
Filed by NSK LTD., Tokyo (JP)
PCT Filed Jan. 14, 2020, PCT No. PCT/JP2020/000836
§ 371(c)(1), (2) Date Jul. 20, 2021,
PCT Pub. No. WO2020/158367, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 2019-012189 (JP), filed on Jan. 28, 2019.
Prior Publication US 2022/0114353 A1, Apr. 14, 2022
Int. Cl. G06K 7/14 (2006.01); F16C 41/00 (2006.01); G06K 19/06 (2006.01)
CPC G06K 7/1417 (2013.01) [F16C 41/008 (2013.01); G06K 19/06037 (2013.01)] 22 Claims
OG exemplary drawing
 
18. A method for reading a two-dimensional code included in a bearing component which is an annular member with the two-dimensional code which has a shape with a maximum circumferential dimension longer than a maximum radial dimensional, wherein the two dimensional code is provided on a flat part of the annular member, and at least one dot row among a plurality of dot rows arranged in a longitudinal direction of the two-dimensional code has a line pattern in which all dots are marked, the method comprising:
imaging the bearing component, and
reading information of the two-dimensional code from the captured image of the bearing component,
wherein the information of the two-dimensional code is read from one of captured images of a captured image group obtained by moving an imaging optical system for imaging the bearing component and imaging a plurality of different locations in the circumferential direction of the bearing.