Title:
ANOMALY SENSING DEVICE, ANOMALY SENSING METHOD, AND COMPUTER PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/090766
Kind Code:
A1
Abstract:
An anomaly sensing device for sensing an anomaly in a ball screw provided in an injection molding machine. The anomaly sensing device is provided with: a current sensor for detecting an AC current of a motor providing the ball screw with a driving force; and a computation unit which senses an anomaly in the ball screw on the basis of information pertaining to a frequency component distribution obtained by performing frequency analysis on the AC current detected by the current sensor, and information pertaining to a frequency component distribution obtained by performing frequency analysis on an AC current detected when a normal ball screw is operated.
Inventors:
OCHIIWA TAKASHI (JP)
MITANI SOMA (JP)
KAWAKITA MASATO (JP)
MITANI SOMA (JP)
KAWAKITA MASATO (JP)
Application Number:
PCT/JP2020/040741
Publication Date:
May 14, 2021
Filing Date:
October 30, 2020
Export Citation:
Assignee:
JAPAN STEEL WORKS LTD (JP)
International Classes:
B22D17/32; B29C45/76; G01M13/02
Foreign References:
| JPH0484728A | 1992-03-18 | |||
| JP2018202706A | 2018-12-27 | |||
| JP2017194371A | 2017-10-26 | |||
| JP2015111113A | 2015-06-18 | |||
| JPH0550480A | 1993-03-02 | |||
| JPH09262889A | 1997-10-07 |
Other References:
See also references of EP 4056298A4
Attorney, Agent or Firm:
KOHNO, Hideto et al. (JP)
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