US 12,332,056 B2
Vibrating-type gyroscope element and angular velocity sensor including same
Ryohei Uchino, Hyogo (JP); Takafumi Moriguchi, Hyogo (JP); and Naoki Okimoto, Hyogo (JP)
Assigned to Sumitomo Precision Products Co., Ltd., Hyogo (JP)
Appl. No. 18/002,961
Filed by Sumitomo Precision Products Co., Ltd., Hyogo (JP)
PCT Filed Jun. 24, 2021, PCT No. PCT/JP2021/024034
§ 371(c)(1), (2) Date Dec. 22, 2022,
PCT Pub. No. WO2022/004563, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 2020-115612 (JP), filed on Jul. 3, 2020.
Prior Publication US 2023/0358539 A1, Nov. 9, 2023
Prior Publication US 2025/0137786 A9, May 1, 2025
Int. Cl. G01C 19/5684 (2012.01); B81B 3/00 (2006.01); G01C 19/5719 (2012.01); H10N 30/30 (2023.01)
CPC G01C 19/5684 (2013.01) [B81B 3/0086 (2013.01); G01C 19/5719 (2013.01); H10N 30/302 (2023.02); B81B 2201/0242 (2013.01); B81B 2203/04 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A vibrating-type gyroscope element, comprising at least:
a fixed part,
a resonator,
a plurality of support parts connecting the resonator to the fixed part and vibratably supporting the resonator,
at least 4N electrodes formed in a plane of the resonator, where N is a natural number of two or more, and
a magnetic field applier that applies a magnetic field to the at least 4N electrodes in a direction crossing a front surface of the resonator,
the resonator having a cos Nθ mode of vibration,
at least one of the electrodes being arranged in each of 4N orientations, where axes of the electrodes are arranged at equiangular intervals in an outer circumferential direction of the resonator,
the electrodes including at least two primary driving electrodes that excite first order vibration of the resonator in the cos Nθ mode and at least two secondary pickoff electrodes that detect second order vibration of the resonator,
wherein:

OG Complex Work Unit Math
and
a relationship of S1=S2
are satisfied,
where S1 is the number of cases where a primary driving electrode is arranged in an orientation adjacent to a clockwise side of a secondary pickoff electrode, S2 is the number of cases where a primary driving electrode is arranged in an orientation adjacent to a counterclockwise side of a secondary pickoff electrode, and U is the number of secondary pickoff electrodes that a primary driving electrode is not arranged in an orientation adjacent to either the clockwise or counterclockwise side thereof.