US 12,276,674 B2
Servo-type vibration detector and vibration control device
Teruo Maruyama, Hirakata (JP); Kozo Okamoto, Kawanishi (JP); Michihiko Tani, Amagasaki (JP); and Takumi Okada, Ikoma (JP)
Assigned to TOKKYOKIKI CORPORATION, Amagasaki (JP)
Appl. No. 18/001,710
Filed by TOKKYOKIKI CORPORATION, Amagasaki (JP)
PCT Filed Jun. 16, 2021, PCT No. PCT/JP2021/022934
§ 371(c)(1), (2) Date Dec. 13, 2022,
PCT Pub. No. WO2021/256521, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 2020-104515 (JP), filed on Jun. 17, 2020.
Prior Publication US 2023/0228787 A1, Jul. 20, 2023
Int. Cl. G01F 15/10 (2006.01); G01P 7/00 (2006.01); G01P 15/105 (2006.01)
CPC G01P 15/105 (2013.01) [G01P 7/00 (2013.01)] 36 Claims
OG exemplary drawing
 
1. A servo-type vibration detector comprising:
a fixed member;
a movable member provided to be movable in a predetermined direction with respect to the fixed member, the movable member being configured to allow a magnetic flux to flow inside the movable member;
an elastic member supporting the fixed member such that the movable member is disposed with a void portion interposed;
a displacement detecting unit detecting displacement of the movable member in the predetermined direction; and
a drive means configured to generate an electromagnetic force for returning the movable member to an origin position when the displacement detecting unit detects a relative displacement of the movable member from the origin position,
wherein the drive means includes a coil fixed to the fixed member, and
the movable member includes at least a movable-side yoke material constituting a part of a closed loop magnetic circuit.