公开(公告)号：US11486777B2

公开(公告)日：2022-11-01

申请号：US17259636

申请日：2019-07-10

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jinseok Kim ,  Sungwook Yang ,  Min Su Jang ,  Jun Sik Kim ,  Kyumin Kang ,  Bum-Jae You

IPC: G01L1/24 ,  G01L3/12

Abstract: Embodiments relate to a torsion sensor device which measures a degree of torsion of a measurement object by using a fiber Bragg gratings (FBG) sensor, the sensor device comprising: an FBG sensor including a sensing unit formed in one section of an elongated optical fiber; and a fixing device for fixing and supporting the FBG sensor to cause displacement of the FBG sensor according to motion of the measurement object, wherein the fixing device includes a bending prevention member to enable the sensing unit to have torsion displacement without bending displacement, according to the motion of the measurement object.