Title:
BELT CONVEYOR ABNORMALITY DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/166778
Kind Code:
A1
Abstract:
To provide a belt conveyor abnormality detection system that, if frequency components of a motor current that drives a belt conveyor are used as features, can separate types of abnormality even if a plurality of abnormalities affect the same frequency component. A belt conveyor abnormality detection device 9 that detects an abnormality in a belt conveyor driven by a motor, said abnormality detection device having: a specific frequency component extraction unit 11 that uses a mechanical specification value of the belt conveyor to extract an amplitude value of a specific frequency component in the motor current; a separate feature extraction unit 12 that extracts, as separate features, features pertaining to a waveform of the change over time in the amplitude value, and features pertaining to the frequency spectrum shape of the motor current; and an abnormality classification unit 16 that, on the basis of the separate features, classifies the abnormalities by type.
Inventors:
NAKAMURA AKIHIRO (JP)
NISHIMURA TAKUMA (JP)
NISHIMURA TAKUMA (JP)
Application Number:
PCT/JP2022/038418
Publication Date:
September 07, 2023
Filing Date:
October 14, 2022
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01M99/00; G01M13/023; H02P29/024
Foreign References:
| JP2020153926A | 2020-09-24 | |||
| JP2006161677A | 2006-06-22 | |||
| JP2021005921A | 2021-01-14 | |||
| JPH1183686A | 1999-03-26 | |||
| US20140336812A1 | 2014-11-13 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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