Title:
THREAD MONITORING DEVICE, THREAD MONITORING METHOD, THREAD WINDER, AND THREAD MONITORING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/205745
Kind Code:
A1
Abstract:
A thread monitoring device 8 is provided with: a light-emitting part 22 which irradiates with light a traveling area where a thread Y travels; a light-receiving part 24 which is disposed at a location facing the light-emitting part 22 across the traveling area, which receives the light having been emitted from the light-emitting part and having been partially blocked by the thread Y, and which outputs a detection signal corresponding to the amount of the light received; and a control unit 26 which detects, on the basis of the detection signal, the state of the thread Y traveling through the travel area. The control unit 26 extracts a prescribed frequency component from the detection signal, and estimates an amount of nap on the thread Y by calculating a standard deviation or an average deviation of the extracted frequency component.
Inventors:
NAKADE KAZUHIKO (JP)
MINAMINO KATSUSHI (JP)
MINAMINO KATSUSHI (JP)
Application Number:
PCT/JP2021/005320
Publication Date:
October 14, 2021
Filing Date:
February 12, 2021
Export Citation:
Assignee:
MURATA MACHINERY LTD (JP)
International Classes:
D01H13/22; B65H63/06; D01H13/32
Domestic Patent References:
| WO2014054528A1 | 2014-04-10 |
Foreign References:
| JPH11325841A | 1999-11-26 | |||
| JP2018177380A | 2018-11-15 | |||
| JP2019128262A | 2019-08-01 | |||
| JP2005299037A | 2005-10-27 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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