US 12,147,619 B2
Method of evaluating magneto-rheological rotating load device
Hyeong Jun Kim, Seoul (KR); Jeen Gi Kim, Seoul (KR); Min Jae Kang, Seoul (KR); and Dong Wook Kim, Seoul (KR)
Assigned to CK MATERIALS LAB CO., LTD., Ansan-si (KR)
Filed by CK MATERIALS LAB CO., LTD., Ansan-si (KR)
Filed on Feb. 22, 2023, as Appl. No. 18/172,736.
Claims priority of application No. 10-2022-0068842 (KR), filed on Jun. 7, 2022.
Prior Publication US 2023/0393677 A1, Dec. 7, 2023
Int. Cl. G06F 3/0362 (2013.01); G01L 5/00 (2006.01); G01L 25/00 (2006.01); G06F 3/01 (2006.01); G01L 3/02 (2006.01); G01M 99/00 (2011.01); H01H 19/14 (2006.01)
CPC G06F 3/0362 (2013.01) [G01L 5/0042 (2013.01); G01L 25/003 (2013.01); G06F 3/016 (2013.01); G01L 3/02 (2013.01); G01M 99/007 (2013.01); G01M 99/008 (2013.01); H01H 19/14 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of evaluating a structural defect of a magneto-rheological rotating load device, wherein the magneto-rheological rotating load device comprises a housing, a shaft rotatably installed in the housing, one or more rotary rings connected to the shaft and configured to rotate in conjunction with a rotation of the shaft, a coil part disposed in the housing, a magneto-rheological fluid with which at least a part in the housing is filled, and a controller configured to control a magnetic field applied to the magneto-rheological fluid by the coil part,
the method comprising:
when at least one of the one or more rotary rings is separated from the shaft, determining by the controller that the structural defect has occurred when measuring of a torque value indicates that the torque value, which is applied when the shaft rotates, decreases from an initial set value within a predetermined range,
wherein the decrease of the torque value within the predetermined range is a discontinuous decrease of the torque value from the initial set value.