US 12,442,833 B2
Strain sensor-based IMU sensor, and inertial measurement system comprising same
Jinseok Kim, Seoul (KR); Minsu Jang, Seoul (KR); Byung Kook Kim, Seoul (KR); and Kyumin Kang, Seoul (KR)
Assigned to Korea Institute of Science and Technology, Seoul (KR)
Appl. No. 18/019,930
Filed by KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY, Seoul (KR)
PCT Filed Aug. 4, 2021, PCT No. PCT/KR2021/010268
§ 371(c)(1), (2) Date Feb. 6, 2023,
PCT Pub. No. WO2022/031034, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 10-2020-0098078 (KR), filed on Aug. 5, 2020.
Prior Publication US 2023/0288446 A1, Sep. 14, 2023
Int. Cl. G01P 15/097 (2006.01); G01F 15/02 (2006.01); G01K 11/3206 (2021.01); G01P 15/02 (2013.01); G01P 15/08 (2006.01); G01P 15/093 (2006.01); G01P 15/18 (2013.01)
CPC G01P 15/097 (2013.01) [G01F 15/02 (2013.01); G01K 11/3206 (2013.01); G01P 15/0802 (2013.01); G01P 15/093 (2013.01); G01P 15/18 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An inertial measurement unit (IMU) sensor for measuring inertia of an object, the IMU sensor comprising:
a plurality of cantilevers each having a surface comprising a first axis and a second axis and configured to be deformable;
a core body coupled to the plurality of cantilevers; and
a plurality of strain sensors respectively located on the plurality of cantilevers and each configured to detect a bending strain of a corresponding cantilever,
wherein at least one from among the plurality of cantilevers is coupled so that a direction of the first axis of the surface of the at least one cantilever faces an x-axis with respect to the core body, at least one other cantilever from among the plurality of cantilevers is coupled so that a direction of the first axis of the surface of the at least one other cantilever faces a y-axis, and at least one other cantilever from among the plurality of cantilevers is coupled so that a direction of the first axis of the surface faces a z-axis,
wherein a linear acceleration or an angular acceleration for the object is measured based on a strain measurement result obtained from the plurality of strain sensors,
wherein the plurality of cantilevers comprise six cantilevers,
wherein each of the six cantilevers comprises a strain sensor aligned in a direction of the first axis on the surface,
wherein two cantilevers from among the six cantilevers are coupled so that an axis parallel to the x-axis is a normal direction of the surface of each of the two cantilevers among the six cantilevers, other two cantilevers are coupled so that an axis parallel to the y-axis is a normal direction of the surface of each of the other two cantilevers, and remaining two cantilevers among the six cantilevers are coupled so that an axis parallel the z-axis is a normal direction of the surface of each of the remaining two cantilevers.