US 12,130,261 B2
Abnormality diagnosis system and abnormality diagnosis method
Shuhei Yamanaka, Tokyo (JP); Katsuya Iida, Tokyo (JP); Takuya Sakamoto, Tokyo (JP); Yoshiyuki Honjo, Tokyo (JP); Hiroshi Inoko, Tokyo (JP); Masatomo Tokuno, Tokyo (JP); and Satoru Nagai, Tokyo (JP)
Assigned to THK CO., LTD., Tokyo (JP)
Appl. No. 17/605,316
Filed by THK CO., LTD., Tokyo (JP)
PCT Filed Apr. 24, 2020, PCT No. PCT/JP2020/017776
§ 371(c)(1), (2) Date Oct. 21, 2021,
PCT Pub. No. WO2020/218543, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-084361 (JP), filed on Apr. 25, 2019.
Prior Publication US 2022/0214311 A1, Jul. 7, 2022
Int. Cl. G01N 29/12 (2006.01); G01M 15/02 (2006.01)
CPC G01N 29/12 (2013.01) [G01M 15/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An abnormality diagnosis system that diagnoses an abnormality related to each control shaft in equipment in which a plurality of control shafts, each control shaft of the plurality of control shafts including a distinct motor and a distinct output unit driven by each distinct motor, are incorporated, the equipment being configured such that a first control shaft of the plurality of control shafts, the first control shaft, arranged to be driven by a first motor, at least receives transmission of vibration due to a second motor driving a second control shaft of the plurality of control shafts when the second motor drives, comprising:
a plurality of vibration sensors that are provided for the plurality of control shafts, respectively, and that detect vibration occurring in connection with driving of each distinct motor corresponding to each control shaft, wherein each control shaft of the plurality of control shafts is connected to a distinct vibration sensor;
a calculation unit that calculates, for each control shaft of the plurality of control shafts, vibration levels in a plurality of predetermined frequency ranges, based on vibration information detected by each vibration sensor of the plurality of vibration sensors; and
a diagnosis unit that diagnoses an abnormality of each control shaft of the plurality of control shafts, based on a distribution state, across the plurality of predetermined frequency ranges and across the plurality of control shafts, of the vibration levels calculated by the calculation unit.